Role of Patient-controlled Epidural Analgesia After Total Hip Replacement

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

111 participants

Study Classification

INTERVENTIONAL

Study Start Date

2014-09-01

Study Completion Date

2016-03-31

Brief Summary

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Total hip replacement (THR) is frequently followed by high pain experience. Epidural analgesia is a mainstay in postoperative treatment in patients after THR. The investigators found that patient-controlled epidural analgesia (PCEA) decreases total analgesics consumption compared to conventional method of analgesia based on physician's prescription while maintaining similar pain relief and safety profile. Therefore, PCEA should be considered the first choice method of analgesia in patients undergoing THR.

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Detailed Description

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The prospective, randomized controlled trial was performed at University Hospital Ostrava. All eligible participants were adult patients of both genders aged 18 years or older, and scheduled for elective orthopaedic surgery (THR). The enrolled patients underwent per-protocol randomization into one of two groups (PCEA or non-PCEA group) using the envelopes method. Randomization was performed immediately after ICU admission by an independent physician, who was not involved in the data collection or management of the study subjects. Following randomization, patients were admitted to the ICU. Data for the analyses were collected for 24 hours after THR. The baseline demographic and preoperative characteristics (age, gender, weight, body mass index, and American Society of Anesthesiologists \[ASA\] physical status) were obtained at the time of admission. The degree of motor block was assessed using the modified Bromage Score. The level of sedation due to the residual effect of anaesthetics at the time of admission was assessed using a sedation score. The Visual Analogue Scale (VAS) values were determined at hourly intervals and 30 minutes after administration of analgesics to determine the effect of the analgesic dose. The other parameters evaluated at hourly intervals were: a) the presence of hypotension defined as a decrease in systolic blood pressure below 90 mmHg or a greater than 30% decrease from the baseline value; b) bradypnea measured on a numeric scale; c) bradycardia defined as heart rate ≤ 50/min and tachycardia defined as heart rate ≥ 120/min; d) the presence of postoperative nausea and vomiting (PONV); and e) skin itching. At the time of discharge from the ICU, the total consumption of analgesics was recorded, and patients' satisfaction was evaluated using the Likert scale. All patients were perioperatively treated by the protocol for administration of anesthesia and analgesia: The patients were administered 7.5 mg of midazolam orally one hour before surgery. Patients weighing more than 70 kg received 2 mg of bisulepin. Prior to surgery, a subarachnoid blockade was established with 2-4 ml of levobupivacaine 0.5% at the L2-L3 spinal interspace. Subsequently, a catheter for postoperative analgesia was inserted into the epidural space. If the subarachnoid blockade was insufficient for surgery, epidural levobupivacaine 0.5 % was administered to a maximum dose of 10 ml, after which the patient underwent general anesthesia and was excluded from the study. During surgery, patients were sedated with a target-controlled infusion of propofol (dose of 1-2 mg/kg body weight per hour) so that they were asleep but aroused when spoken to. After surgery, patients received a mixture of levobupivacaine 0.1% and sufentanil 1 µg/ml. Postoperatively, patients were moved to the ICU. Immediately after ICU admission, continuous monitoring of vital functions and pain was initiated. When the pain intensity exceeded ≥ 4 points, analgesic therapy was initiated by the administration of a mixture containing levobupivacaine 0.1% and sufentanil 1 μg/ml. The PCEA group was initially given a bolus of 10 ml of the mixture, and then a basal infusion at the rate of 3 ml/h. The bolus was set on 4 ml, a lockout interval of 20 minutes, and a maximum dose of 40 ml/4 h according to the literature recommendation. The non-PCEA group was initially administered 5 ml of the analgesic mixture followed by a basal infusion at 5 ml/h. If pain developed, a bolus of 8 ml of the mixture was administered according to the physician's prescription. If analgesia was insufficient after 1 hour of maximal dosing in both groups, the patient was given adjunctive analgesic therapy including one or a combination of the following drugs: i.v. paracetamol, i.v. metamizole, or i.v. tramadol. Patients requiring systemic adjunctive medication were excluded from the final analysis.

Conditions

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Hip Joint Disorders

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

The patients were randomized into two groups with two distinct interventions - patient-controlled analgesia vs. conventional analgesia prescribed by the attending physician.

Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Neither the investigators nor the patients were blinded in the study.

Study Groups

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PCEA Group

The patients randomized into this arm were able to control the administration of analgesics, according to their subjective condition.

Group Type EXPERIMENTAL

PCEA

Intervention Type PROCEDURE

The patients were able to control the administration of analgesics by themselves.

Total hip replacement

Intervention Type PROCEDURE

All patients enrolled in the study were indicated for total hip replacement surgery.

Non-PCEA Group

The patients randomized into this arm were receiving analgesics according to the physician's prescription.

Group Type ACTIVE_COMPARATOR

Non-PCEA

Intervention Type PROCEDURE

The patients were receiving analgesics according to the physician's prescription.

Total hip replacement

Intervention Type PROCEDURE

All patients enrolled in the study were indicated for total hip replacement surgery.

Interventions

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PCEA

The patients were able to control the administration of analgesics by themselves.

Intervention Type PROCEDURE

Non-PCEA

The patients were receiving analgesics according to the physician's prescription.

Intervention Type PROCEDURE

Total hip replacement

All patients enrolled in the study were indicated for total hip replacement surgery.

Intervention Type PROCEDURE

Other Intervention Names

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Patient-controlled epidural analgesia (PCEA) Non-patient controlled epidural analgesia (Non-PCEA)

Eligibility Criteria

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Inclusion Criteria

* Age \> 18 years
* ASA I-III on pre-anesthesia evaluation
* ICU admission after total hip replacement surgery
* Glasgow Coma Scale (GCS) 13 or more
* Spontaneous breathing at a rate of 12-24 breaths/min
* SpO2 ≥ 90%
* Modified Bromage Score 0 or 1
* Visual analog scale (VAS) ≥ 4
* Signed Informed Consent Form for participation

Exclusion Criteria

* History of long-term opioid therapy (the use of an opioid analgesic at doses higher than codeine 120 mg/day, hydrocodone 40 mg/day, tramadol 200 mg/day or oxycodone 40 mg/day 0-4 days before surgery)
* Indications for revision surgery during immediate postoperative care
* Acute skin disease

Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No