Trial Outcomes & Findings for Intravenous Dexmedetomidine for Cesarean Section (NCT NCT03065530)

NCT ID: NCT03065530

Last Updated: 2020-01-13

Results Overview

visual analogue scale (VAS; with 0, no pain; to 10, the worst imaginable pain) is a validated assessing scale for pain intensity. VAS at rest was assessed when the patient was in supine position

Recruitment status

COMPLETED

Study phase

PHASE4

Target enrollment

120 participants

Primary outcome timeframe

6h after cesarean section.

Results posted on

2020-01-13

Participant Flow

Parturients (\>18 and \<45 years old) with a singleton pregnancy admitted to our institute who underwent elective caesarean delivery under epidural anaesthesia were recruited in this study between February 2017 and October 2017.

not meeting inclusion criteria (n=39) declined to participate , n=14 other reasons, n=3

Participant milestones

Participant milestones
Measure
Group C
The placebo group will pumped in the same volume of saline 0.9% as calculated by parturients' weight in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Normal Saline: Drug: Normal saline control group receive NS after delivery. Drug: butorphanol tartrate PCA: butorphanol tartrate after cesarean section.
Group D1
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.03ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.03ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.03ug/kg/h Dexmedetomidine after cesarean section.
Group D2
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.05ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.05ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.05ug/kg/h Dexmedetomidine after cesarean section.
Group D3
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.08ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.08ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.08ug/kg/h Dexmedetomidine after cesarean section.
Overall Study
STARTED
30
30
30
30
Overall Study
COMPLETED
28
29
29
28
Overall Study
NOT COMPLETED
2
1
1
2

Reasons for withdrawal

Reasons for withdrawal
Measure
Group C
The placebo group will pumped in the same volume of saline 0.9% as calculated by parturients' weight in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Normal Saline: Drug: Normal saline control group receive NS after delivery. Drug: butorphanol tartrate PCA: butorphanol tartrate after cesarean section.
Group D1
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.03ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.03ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.03ug/kg/h Dexmedetomidine after cesarean section.
Group D2
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.05ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.05ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.05ug/kg/h Dexmedetomidine after cesarean section.
Group D3
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.08ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.08ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.08ug/kg/h Dexmedetomidine after cesarean section.
Overall Study
Lack of Efficacy
1
1
0
1
Overall Study
Protocol Violation
1
0
1
1

Baseline Characteristics

Intravenous Dexmedetomidine for Cesarean Section

Baseline characteristics by cohort

Baseline characteristics by cohort
Measure
Placebo
n=28 Participants
The placebo group will pumped in the same volume of saline 0.9% as calculated by parturients' weight in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Normal Saline: Drug: Normal saline control group receive NS after delivery. Drug: butorphanol tartrate PCA: butorphanol tartrate after cesarean section.
Dexmedetomidine 0.03ug/kg/h
n=29 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.03ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.03ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.03ug/kg/h Dexmedetomidine after cesarean section.
Dexmedetomidine 0.05ug/kg/h
n=29 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.05ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.05ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.05ug/kg/h Dexmedetomidine after cesarean section.
Dexmedetomidine 0.08ug/kg/h
n=28 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.08ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.08ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.08ug/kg/h Dexmedetomidine after cesarean section.
Total
n=114 Participants
Total of all reporting groups
Age, Categorical
<=18 years
0 Participants
n=93 Participants
0 Participants
n=4 Participants
0 Participants
n=27 Participants
0 Participants
n=483 Participants
0 Participants
n=36 Participants
Age, Categorical
Between 18 and 65 years
28 Participants
n=93 Participants
29 Participants
n=4 Participants
29 Participants
n=27 Participants
28 Participants
n=483 Participants
114 Participants
n=36 Participants
Age, Categorical
>=65 years
0 Participants
n=93 Participants
0 Participants
n=4 Participants
0 Participants
n=27 Participants
0 Participants
n=483 Participants
0 Participants
n=36 Participants
Age, Continuous
31.75 years
STANDARD_DEVIATION 3.46 • n=93 Participants
31.41 years
STANDARD_DEVIATION 3.69 • n=4 Participants
32.07 years
STANDARD_DEVIATION 4.2 • n=27 Participants
31.11 years
STANDARD_DEVIATION 3.37 • n=483 Participants
31.59 years
STANDARD_DEVIATION 3.67 • n=36 Participants
Sex: Female, Male
Female
28 Participants
n=93 Participants
29 Participants
n=4 Participants
29 Participants
n=27 Participants
28 Participants
n=483 Participants
114 Participants
n=36 Participants
Sex: Female, Male
Male
0 Participants
n=93 Participants
0 Participants
n=4 Participants
0 Participants
n=27 Participants
0 Participants
n=483 Participants
0 Participants
n=36 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants
n=93 Participants
0 Participants
n=4 Participants
0 Participants
n=27 Participants
0 Participants
n=483 Participants
0 Participants
n=36 Participants
Race (NIH/OMB)
Asian
28 Participants
n=93 Participants
29 Participants
n=4 Participants
29 Participants
n=27 Participants
28 Participants
n=483 Participants
114 Participants
n=36 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants
n=93 Participants
0 Participants
n=4 Participants
0 Participants
n=27 Participants
0 Participants
n=483 Participants
0 Participants
n=36 Participants
Race (NIH/OMB)
Black or African American
0 Participants
n=93 Participants
0 Participants
n=4 Participants
0 Participants
n=27 Participants
0 Participants
n=483 Participants
0 Participants
n=36 Participants
Race (NIH/OMB)
White
0 Participants
n=93 Participants
0 Participants
n=4 Participants
0 Participants
n=27 Participants
0 Participants
n=483 Participants
0 Participants
n=36 Participants
Race (NIH/OMB)
More than one race
0 Participants
n=93 Participants
0 Participants
n=4 Participants
0 Participants
n=27 Participants
0 Participants
n=483 Participants
0 Participants
n=36 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants
n=93 Participants
0 Participants
n=4 Participants
0 Participants
n=27 Participants
0 Participants
n=483 Participants
0 Participants
n=36 Participants
Region of Enrollment
China
28 Participants
n=93 Participants
29 Participants
n=4 Participants
29 Participants
n=27 Participants
28 Participants
n=483 Participants
114 Participants
n=36 Participants

PRIMARY outcome

Timeframe: 6h after cesarean section.

visual analogue scale (VAS; with 0, no pain; to 10, the worst imaginable pain) is a validated assessing scale for pain intensity. VAS at rest was assessed when the patient was in supine position

Outcome measures

Outcome measures
Measure
Group C
n=28 Participants
The placebo group will pumped in the same volume of saline 0.9% as calculated by parturients' weight in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Normal Saline: Drug: Normal saline control group receive NS after delivery. Drug: butorphanol tartrate PCA: butorphanol tartrate after cesarean section.
Group D1
n=29 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.03ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.03ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.03ug/kg/h Dexmedetomidine after cesarean section.
Group D2
n=29 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.05ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.05ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.05ug/kg/h Dexmedetomidine after cesarean section.
Group D3
n=28 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.08ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.08ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.08ug/kg/h Dexmedetomidine after cesarean section.
Postoperative Pain Score (Visual Analogue Scale, VAS) at Rest
3.143 units on a scale
Standard Deviation 1.38
2.897 units on a scale
Standard Deviation 1.012
1.665 units on a scale
Standard Deviation 1.045
1.25 units on a scale
Standard Deviation 0.7515

SECONDARY outcome

Timeframe: 48h after cesarean section.

Relative infant dose (RID) =Dose (infant, mg•kg-1•day-1) /Dose (mother, mg•kg-1•day-1) μg·kg-1·h-1. The Dose (infant) in mg•kg-1 is calculated by multiplying the concentration of the drug in breast milk by the volume of breast milk consumed daily (about 150 mL•kg-1).

Outcome measures

Outcome measures
Measure
Group C
n=16 Participants
The placebo group will pumped in the same volume of saline 0.9% as calculated by parturients' weight in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Normal Saline: Drug: Normal saline control group receive NS after delivery. Drug: butorphanol tartrate PCA: butorphanol tartrate after cesarean section.
Group D1
n=15 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.03ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.03ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.03ug/kg/h Dexmedetomidine after cesarean section.
Group D2
n=17 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.05ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.05ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.05ug/kg/h Dexmedetomidine after cesarean section.
Group D3
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.08ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.08ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.08ug/kg/h Dexmedetomidine after cesarean section.
Relative Infant Dose (RID) of Dexmedetomidine
0.1712 percentage of one hundred
Standard Deviation 0.1764
0.1967 percentage of one hundred
Standard Deviation 0.1141
0.3701 percentage of one hundred
Standard Deviation 0.2357

SECONDARY outcome

Timeframe: 12h after cesarean section.

visual analogue scale (VAS; with 0, no pain; to 10, the worst imaginable pain) is a validated assessing scale for pain intensity. VAS at rest was assessed when the patient was in supine position

Outcome measures

Outcome measures
Measure
Group C
n=28 Participants
The placebo group will pumped in the same volume of saline 0.9% as calculated by parturients' weight in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Normal Saline: Drug: Normal saline control group receive NS after delivery. Drug: butorphanol tartrate PCA: butorphanol tartrate after cesarean section.
Group D1
n=29 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.03ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.03ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.03ug/kg/h Dexmedetomidine after cesarean section.
Group D2
n=29 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.05ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.05ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.05ug/kg/h Dexmedetomidine after cesarean section.
Group D3
n=28 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.08ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.08ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.08ug/kg/h Dexmedetomidine after cesarean section.
Postoperative Pain Score (Visual Analogue Scale, VAS) at Rest
3.29 score on a scale
Standard Deviation 1.01
2.86 score on a scale
Standard Deviation 0.99
1.62 score on a scale
Standard Deviation 0.78
0.93 score on a scale
Standard Deviation 0.94

SECONDARY outcome

Timeframe: 6h after cesarean section.

Sedation intensity measured with RSS is recorded at the 6, 12 24 and 48 h after cesarean section. Sedation was assessed by the Ramsay Sedation Scores (RSS) (1, anxious patient; 2, cooperative and tranquil; 3, responding to command; 4, brisk response to stimulus; 5, sluggish response to stimulus; 6, no response to stimulus).

Outcome measures

Outcome measures
Measure
Group C
n=28 Participants
The placebo group will pumped in the same volume of saline 0.9% as calculated by parturients' weight in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Normal Saline: Drug: Normal saline control group receive NS after delivery. Drug: butorphanol tartrate PCA: butorphanol tartrate after cesarean section.
Group D1
n=29 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.03ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.03ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.03ug/kg/h Dexmedetomidine after cesarean section.
Group D2
n=29 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.05ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.05ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.05ug/kg/h Dexmedetomidine after cesarean section.
Group D3
n=28 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.08ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.08ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.08ug/kg/h Dexmedetomidine after cesarean section.
Ramsay Sedation Score(RSS)
2 score on a scale
Standard Deviation 0
2.17 score on a scale
Standard Deviation 0.38
2.14 score on a scale
Standard Deviation 0.35
3.14 score on a scale
Standard Deviation 0.71

SECONDARY outcome

Timeframe: 48h after cesarean section.

The degree of satisfaction (0, very satisfied; 1, satisfied; 2, moderately satisfied; 3, not satisfied) was evaluated at 48 h after surgery. The number of overall satisfied patients (satisfied and very satisfied) is reported.

Outcome measures

Outcome measures
Measure
Group C
n=28 Participants
The placebo group will pumped in the same volume of saline 0.9% as calculated by parturients' weight in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Normal Saline: Drug: Normal saline control group receive NS after delivery. Drug: butorphanol tartrate PCA: butorphanol tartrate after cesarean section.
Group D1
n=29 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.03ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.03ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.03ug/kg/h Dexmedetomidine after cesarean section.
Group D2
n=29 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.05ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.05ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.05ug/kg/h Dexmedetomidine after cesarean section.
Group D3
n=28 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.08ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.08ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.08ug/kg/h Dexmedetomidine after cesarean section.
The Degree of Satisfaction
12 Participants
16 Participants
26 Participants
25 Participants

SECONDARY outcome

Timeframe: 48h after cesarean section.

Total times during 48h after cesarean section.

Outcome measures

Outcome measures
Measure
Group C
n=28 Participants
The placebo group will pumped in the same volume of saline 0.9% as calculated by parturients' weight in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Normal Saline: Drug: Normal saline control group receive NS after delivery. Drug: butorphanol tartrate PCA: butorphanol tartrate after cesarean section.
Group D1
n=29 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.03ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.03ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.03ug/kg/h Dexmedetomidine after cesarean section.
Group D2
n=29 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.05ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.05ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.05ug/kg/h Dexmedetomidine after cesarean section.
Group D3
n=28 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.08ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.08ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.08ug/kg/h Dexmedetomidine after cesarean section.
Number of Participants That Experienced Nausea or Vomiting
1 participants
2 participants
1 participants
1 participants

SECONDARY outcome

Timeframe: 12h after cesarean section.

Sedation intensity measured with RSS is recorded at the 6, 12, 24, and 48 h after cesarean section. Sedation was assessed by the Ramsay Sedation Scores (RSS) (1, anxious patient; 2, cooperative and tranquil; 3, responding to command; 4, brisk response to stimulus; 5, sluggish response to stimulus; 6, no response to stimulus).

Outcome measures

Outcome measures
Measure
Group C
n=28 Participants
The placebo group will pumped in the same volume of saline 0.9% as calculated by parturients' weight in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Normal Saline: Drug: Normal saline control group receive NS after delivery. Drug: butorphanol tartrate PCA: butorphanol tartrate after cesarean section.
Group D1
n=29 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.03ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.03ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.03ug/kg/h Dexmedetomidine after cesarean section.
Group D2
n=29 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.05ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.05ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.05ug/kg/h Dexmedetomidine after cesarean section.
Group D3
n=28 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.08ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.08ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.08ug/kg/h Dexmedetomidine after cesarean section.
Ramsay Sedation Score(RSS)
2 score on a scale
Standard Deviation 0
2.21 score on a scale
Standard Deviation 0.41
2.28 score on a scale
Standard Deviation 0.45
3.21 score on a scale
Standard Deviation 0.74

SECONDARY outcome

Timeframe: 24h after cesarean section.

Sedation intensity measured with RSS is recorded at the 6, 12, 24, and 48 h after cesarean section. Sedation was assessed by the Ramsay Sedation Scores (RSS) (1, anxious patient; 2, cooperative and tranquil; 3, responding to command; 4, brisk response to stimulus; 5, sluggish response to stimulus; 6, no response to stimulus).

Outcome measures

Outcome measures
Measure
Group C
n=28 Participants
The placebo group will pumped in the same volume of saline 0.9% as calculated by parturients' weight in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Normal Saline: Drug: Normal saline control group receive NS after delivery. Drug: butorphanol tartrate PCA: butorphanol tartrate after cesarean section.
Group D1
n=29 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.03ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.03ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.03ug/kg/h Dexmedetomidine after cesarean section.
Group D2
n=29 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.05ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.05ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.05ug/kg/h Dexmedetomidine after cesarean section.
Group D3
n=28 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.08ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.08ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.08ug/kg/h Dexmedetomidine after cesarean section.
Ramsay Sedation Score(RSS)
2 score on a scale
Standard Deviation 0
2.07 score on a scale
Standard Deviation 0.26
2.10 score on a scale
Standard Deviation 0.31
2.25 score on a scale
Standard Deviation 0.44

SECONDARY outcome

Timeframe: 48h after cesarean section.

Sedation intensity measured with RSS is recorded at the 6, 12, 24, and 48 h after cesarean section. Sedation was assessed by the Ramsay Sedation Scores (RSS) (1, anxious patient; 2, cooperative and tranquil; 3, responding to command; 4, brisk response to stimulus; 5, sluggish response to stimulus; 6, no response to stimulus).

Outcome measures

Outcome measures
Measure
Group C
n=28 Participants
The placebo group will pumped in the same volume of saline 0.9% as calculated by parturients' weight in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Normal Saline: Drug: Normal saline control group receive NS after delivery. Drug: butorphanol tartrate PCA: butorphanol tartrate after cesarean section.
Group D1
n=29 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.03ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.03ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.03ug/kg/h Dexmedetomidine after cesarean section.
Group D2
n=29 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.05ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.05ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.05ug/kg/h Dexmedetomidine after cesarean section.
Group D3
n=28 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.08ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.08ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.08ug/kg/h Dexmedetomidine after cesarean section.
Ramsay Sedation Score(RSS)
2 score on a scale
Standard Deviation 0
2 score on a scale
Standard Deviation 0
2 score on a scale
Standard Deviation 0
2 score on a scale
Standard Deviation 0

SECONDARY outcome

Timeframe: 24h after cesarean section.

visual analogue scale (VAS; with 0, no pain; to 10, the worst imaginable pain) is a validated assessing scale for pain intensity. VAS at rest was assessed when the patient was in supine position

Outcome measures

Outcome measures
Measure
Group C
n=28 Participants
The placebo group will pumped in the same volume of saline 0.9% as calculated by parturients' weight in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Normal Saline: Drug: Normal saline control group receive NS after delivery. Drug: butorphanol tartrate PCA: butorphanol tartrate after cesarean section.
Group D1
n=29 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.03ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.03ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.03ug/kg/h Dexmedetomidine after cesarean section.
Group D2
n=29 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.05ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.05ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.05ug/kg/h Dexmedetomidine after cesarean section.
Group D3
n=28 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.08ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.08ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.08ug/kg/h Dexmedetomidine after cesarean section.
Postoperative Pain Score (Visual Analogue Scale, VAS) at Rest
3.21 score on a scale
Standard Deviation 0.92
2.93 score on a scale
Standard Deviation 1.03
1.72 score on a scale
Standard Deviation 0.84
1.57 score on a scale
Standard Deviation 1.17

SECONDARY outcome

Timeframe: 48h after cesarean section.

visual analogue scale (VAS; with 0, no pain; to 10, the worst imaginable pain) is a validated assessing scale for pain intensity. VAS at rest was assessed when the patient was in supine position

Outcome measures

Outcome measures
Measure
Group C
n=28 Participants
The placebo group will pumped in the same volume of saline 0.9% as calculated by parturients' weight in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Normal Saline: Drug: Normal saline control group receive NS after delivery. Drug: butorphanol tartrate PCA: butorphanol tartrate after cesarean section.
Group D1
n=29 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.03ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.03ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.03ug/kg/h Dexmedetomidine after cesarean section.
Group D2
n=29 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.05ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.05ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.05ug/kg/h Dexmedetomidine after cesarean section.
Group D3
n=28 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.08ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.08ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.08ug/kg/h Dexmedetomidine after cesarean section.
Postoperative Pain Score (Visual Analogue Scale, VAS)
2.11 score on a scale
Standard Deviation 0.96
2 score on a scale
Standard Deviation 0.8
1.72 score on a scale
Standard Deviation 0.84
125 score on a scale
Standard Deviation 0.75

SECONDARY outcome

Timeframe: 6h after cesarean section.

visual analogue scale (VAS; with 0, no pain; to 10, the worst imaginable pain) is a validated assessing scale for pain intensity. VAS on movement was assessed when patients changed from supine to lateral position.

Outcome measures

Outcome measures
Measure
Group C
n=28 Participants
The placebo group will pumped in the same volume of saline 0.9% as calculated by parturients' weight in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Normal Saline: Drug: Normal saline control group receive NS after delivery. Drug: butorphanol tartrate PCA: butorphanol tartrate after cesarean section.
Group D1
n=29 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.03ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.03ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.03ug/kg/h Dexmedetomidine after cesarean section.
Group D2
n=29 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.05ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.05ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.05ug/kg/h Dexmedetomidine after cesarean section.
Group D3
n=28 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.08ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.08ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.08ug/kg/h Dexmedetomidine after cesarean section.
Postoperative Pain Score (Visual Analogue Scale, VAS) on Movement
4.39 score on a scale
Standard Deviation 0.74
4.31 score on a scale
Standard Deviation 1.14
2.86 score on a scale
Standard Deviation 1.48
2.2 score on a scale
Standard Deviation 0.65

SECONDARY outcome

Timeframe: 12h after cesarean section.

visual analogue scale (VAS; with 0, no pain; to 10, the worst imaginable pain) is a validated assessing scale for pain intensity. VAS on movement was assessed when patients changed from supine to lateral position.

Outcome measures

Outcome measures
Measure
Group C
n=28 Participants
The placebo group will pumped in the same volume of saline 0.9% as calculated by parturients' weight in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Normal Saline: Drug: Normal saline control group receive NS after delivery. Drug: butorphanol tartrate PCA: butorphanol tartrate after cesarean section.
Group D1
n=29 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.03ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.03ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.03ug/kg/h Dexmedetomidine after cesarean section.
Group D2
n=29 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.05ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.05ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.05ug/kg/h Dexmedetomidine after cesarean section.
Group D3
n=28 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.08ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.08ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.08ug/kg/h Dexmedetomidine after cesarean section.
Postoperative Pain Score (Visual Analogue Scale, VAS) on Movement
3.71 score on a scale
Standard Deviation 0.81
3.52 score on a scale
Standard Deviation 0.87
2.69 score on a scale
Standard Deviation 1.07
1.18 score on a scale
Standard Deviation 0.86

SECONDARY outcome

Timeframe: 24h after cesarean section.

visual analogue scale (VAS; with 0, no pain; to 10, the worst imaginable pain) is a validated assessing scale for pain intensity. VAS on movement was assessed when patients changed from supine to lateral position.

Outcome measures

Outcome measures
Measure
Group C
n=28 Participants
The placebo group will pumped in the same volume of saline 0.9% as calculated by parturients' weight in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Normal Saline: Drug: Normal saline control group receive NS after delivery. Drug: butorphanol tartrate PCA: butorphanol tartrate after cesarean section.
Group D1
n=29 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.03ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.03ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.03ug/kg/h Dexmedetomidine after cesarean section.
Group D2
n=29 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.05ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.05ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.05ug/kg/h Dexmedetomidine after cesarean section.
Group D3
n=28 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.08ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.08ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.08ug/kg/h Dexmedetomidine after cesarean section.
Postoperative Pain Score (Visual Analogue Scale, VAS) on Movement
3.82 score on a scale
Standard Deviation 0.86
3.79 score on a scale
Standard Deviation 0.82
2.35 score on a scale
Standard Deviation 1.20
1.93 score on a scale
Standard Deviation 1.02

SECONDARY outcome

Timeframe: 48h after cesarean section.

visual analogue scale (VAS; with 0, no pain; to 10, the worst imaginable pain) is a validated assessing scale for pain intensity. VAS on movement was assessed when patients changed from supine to lateral position.

Outcome measures

Outcome measures
Measure
Group C
n=28 Participants
The placebo group will pumped in the same volume of saline 0.9% as calculated by parturients' weight in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Normal Saline: Drug: Normal saline control group receive NS after delivery. Drug: butorphanol tartrate PCA: butorphanol tartrate after cesarean section.
Group D1
n=29 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.03ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.03ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.03ug/kg/h Dexmedetomidine after cesarean section.
Group D2
n=29 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.05ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.05ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.05ug/kg/h Dexmedetomidine after cesarean section.
Group D3
n=28 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.08ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.08ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.08ug/kg/h Dexmedetomidine after cesarean section.
Postoperative Pain Score (Visual Analogue Scale, VAS) on Movement
3.43 score on a scale
Standard Deviation 1.26
3.28 score on a scale
Standard Deviation 1.10
2.24 score on a scale
Standard Deviation 1.19
1.21 score on a scale
Standard Deviation 0.92

SECONDARY outcome

Timeframe: 6h after cesarean section.

visual analogue scale (VAS; with 0, no pain; to 10, the worst imaginable pain) is a validated assessing scale for pain intensity. VAS-C was assessed when the patient required oxytocin after surgery in supine position

Outcome measures

Outcome measures
Measure
Group C
n=28 Participants
The placebo group will pumped in the same volume of saline 0.9% as calculated by parturients' weight in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Normal Saline: Drug: Normal saline control group receive NS after delivery. Drug: butorphanol tartrate PCA: butorphanol tartrate after cesarean section.
Group D1
n=29 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.03ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.03ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.03ug/kg/h Dexmedetomidine after cesarean section.
Group D2
n=29 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.05ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.05ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.05ug/kg/h Dexmedetomidine after cesarean section.
Group D3
n=28 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.08ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.08ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.08ug/kg/h Dexmedetomidine after cesarean section.
Postoperative Pain Score (Visual Analogue Scale, VAS) on Uterine Cramping
3.86 score on a scale
Standard Deviation 0.85
3.66 score on a scale
Standard Deviation 0.94
2.79 score on a scale
Standard Deviation 0.98
2 score on a scale
Standard Deviation 1.22

SECONDARY outcome

Timeframe: 12h after cesarean section.

visual analogue scale (VAS; with 0, no pain; to 10, the worst imaginable pain) is a validated assessing scale for pain intensity. VAS-C was assessed when the patient required oxytocin after surgery in supine position

Outcome measures

Outcome measures
Measure
Group C
n=28 Participants
The placebo group will pumped in the same volume of saline 0.9% as calculated by parturients' weight in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Normal Saline: Drug: Normal saline control group receive NS after delivery. Drug: butorphanol tartrate PCA: butorphanol tartrate after cesarean section.
Group D1
n=29 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.03ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.03ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.03ug/kg/h Dexmedetomidine after cesarean section.
Group D2
n=29 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.05ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.05ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.05ug/kg/h Dexmedetomidine after cesarean section.
Group D3
n=28 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.08ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.08ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.08ug/kg/h Dexmedetomidine after cesarean section.
Postoperative Pain Score (Visual Analogue Scale, VAS) on Uterine Cramping
3.46 score on a scale
Standard Deviation 1.20
3.41 score on a scale
Standard Deviation 0.95
2.17 score on a scale
Standard Deviation 1.00
1.07 score on a scale
Standard Deviation 1.15

SECONDARY outcome

Timeframe: 24h after cesarean section.

visual analogue scale (VAS; with 0, no pain; to 10, the worst imaginable pain) is a validated assessing scale for pain intensity. VAS-C was assessed when the patient required oxytocin after surgery in supine position

Outcome measures

Outcome measures
Measure
Group C
n=28 Participants
The placebo group will pumped in the same volume of saline 0.9% as calculated by parturients' weight in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Normal Saline: Drug: Normal saline control group receive NS after delivery. Drug: butorphanol tartrate PCA: butorphanol tartrate after cesarean section.
Group D1
n=29 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.03ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.03ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.03ug/kg/h Dexmedetomidine after cesarean section.
Group D2
n=29 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.05ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.05ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.05ug/kg/h Dexmedetomidine after cesarean section.
Group D3
n=28 Participants
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.08ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.08ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.08ug/kg/h Dexmedetomidine after cesarean section.
Postoperative Pain Score (Visual Analogue Scale, VAS) on Uterine Cramping
3.75 score on a scale
Standard Deviation 1.35
3.55 score on a scale
Standard Deviation 0.99
2.59 score on a scale
Standard Deviation 1.21
1.79 score on a scale
Standard Deviation 1.10

Adverse Events

Group C

Serious events: 0 serious events
Other events: 1 other events
Deaths: 0 deaths

Group D1

Serious events: 0 serious events
Other events: 2 other events
Deaths: 0 deaths

Group D2

Serious events: 0 serious events
Other events: 1 other events
Deaths: 0 deaths

Group D3

Serious events: 0 serious events
Other events: 1 other events
Deaths: 0 deaths

Serious adverse events

Adverse event data not reported

Other adverse events

Other adverse events
Measure
Group C
n=28 participants at risk
The placebo group will pumped in the same volume of saline 0.9% as calculated by parturients' weight in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Normal Saline: Drug: Normal saline control group receive NS after delivery. Drug: butorphanol tartrate PCA: butorphanol tartrate after cesarean section.
Group D1
n=29 participants at risk
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.03ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.03ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.03ug/kg/h Dexmedetomidine after cesarean section.
Group D2
n=29 participants at risk
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.05ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.05ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.05ug/kg/h Dexmedetomidine after cesarean section.
Group D3
n=28 participants at risk
This group will receive 0.5ug/kg intravenous dexmedetomidine diluted to 4ug/ml in 30 min. Postoperative analgesic formula: 3ug/kg/h butorphanol tartrate with 0.08ug/kg/h dexmedetomidine, diluted with normal saline to 100ml. Background dose: 2ml/h, PCA: 0.5ml, locking time: 15 min. Dexmedetomidine 0.08ug/kg/h: Drug: Dexmedetomidine This group receive Dex 0.5ug/kg after delivery. Drug: butorphanol tartrate and Dexmedetomidine. PCA: butorphanol tartrate with 0.08ug/kg/h Dexmedetomidine after cesarean section.
Gastrointestinal disorders
nausea
3.6%
1/28 • Number of events 1 • Every 6 hours post cesarean section, up to 48 hours in total.
6.9%
2/29 • Number of events 2 • Every 6 hours post cesarean section, up to 48 hours in total.
3.4%
1/29 • Number of events 1 • Every 6 hours post cesarean section, up to 48 hours in total.
3.6%
1/28 • Number of events 1 • Every 6 hours post cesarean section, up to 48 hours in total.

Additional Information

Dr. Shijiang Liu, Dr. Mei Gao

The First Affiliated Hospital of Nanjing Medical University

Phone: +862568303569

Results disclosure agreements

  • Principal investigator is a sponsor employee
  • Publication restrictions are in place