Trial Outcomes & Findings for EXPAREL Dose-Response for Single-Injection Femoral Nerve Blocks (NCT NCT01349140)

NCT ID: NCT01349140

Last Updated: 2021-03-25

Results Overview

A dynamometer was used to measure the force produced during a maximum voluntary isometric contraction (MVIC) in a seated position with the knees flexed at 90°. The dynamometer was placed on the anterior tibia perpendicular to the tibial crest, just proximal to the medial malleolus. Subjects were asked to take 2 seconds to come to maximum effort contracting the ipsilateral quadriceps femoris, maintain this effort for 5 seconds, and then relax. The measurements immediately before study drug administration were designated baseline, and all subsequent are expressed as a percentage of the baseline.

Recruitment status

COMPLETED

Study phase

PHASE1

Target enrollment

14 participants

Primary outcome timeframe

Baseline until 99 hours

Results posted on

2021-03-25

Participant Flow

We enrolled 14 subjects, and therefore "Protocol Enrollment" is "14". However, each leg of each subject was treated separately with a different dose of liposomal bupivacaine (Exparel); and, therefore the number of units analyzed is 28.

Unit of analysis: Side (left or right)

Participant milestones

Participant milestones
Measure
Nerve Block
EXPAREL: active liposome bupivacaine
Overall Study
STARTED
14 28
Overall Study
COMPLETED
14 28
Overall Study
NOT COMPLETED
0 0

Reasons for withdrawal

Withdrawal data not reported

Baseline Characteristics

EXPAREL Dose-Response for Single-Injection Femoral Nerve Blocks

Baseline characteristics by cohort

Baseline characteristics by cohort
Measure
Nerve Block
n=14 Participants
Exparel: liposome bupivacaine
Age, Continuous
35 years
n=93 Participants
Sex: Female, Male
Female
7 Participants
n=93 Participants
Sex: Female, Male
Male
7 Participants
n=93 Participants
Region of Enrollment
United States
14 participants
n=93 Participants

PRIMARY outcome

Timeframe: Baseline until 99 hours

Population: Each of 14 subjects had a different dose of medication administered to each the left and right sides, and therefore there were 14 subjects, 28 units analyzed.

A dynamometer was used to measure the force produced during a maximum voluntary isometric contraction (MVIC) in a seated position with the knees flexed at 90°. The dynamometer was placed on the anterior tibia perpendicular to the tibial crest, just proximal to the medial malleolus. Subjects were asked to take 2 seconds to come to maximum effort contracting the ipsilateral quadriceps femoris, maintain this effort for 5 seconds, and then relax. The measurements immediately before study drug administration were designated baseline, and all subsequent are expressed as a percentage of the baseline.

Outcome measures

Outcome measures
Measure
Nerve Block
n=28 side of the body (left or right)
Exparel: liposome bupivacaine
Quadriceps Femoris Muscle Strength
Leg #1: Dose 0 mg nondominant
NA percentage of baseline measurement
Unavailable due to observation error by research nurse.
Quadriceps Femoris Muscle Strength
Leg #2: Dose 0 mg nondominant
NA percentage of baseline measurement
Unavailable due to observation error by research nurse.
Quadriceps Femoris Muscle Strength
Leg #3: Dose 0 mg nondominant
9 percentage of baseline measurement
Quadriceps Femoris Muscle Strength
Leg #4: Dose 0 mg dominant
13 percentage of baseline measurement
Quadriceps Femoris Muscle Strength
Leg #5: Dose 1 mg dominant
12 percentage of baseline measurement
Quadriceps Femoris Muscle Strength
Leg #6: Dose 2 mg Nondominant
NA percentage of baseline measurement
Unavailable due to observation error by research nurse.
Quadriceps Femoris Muscle Strength
Leg #7: Dose 3 mg Dominant
8 percentage of baseline measurement
Quadriceps Femoris Muscle Strength
Leg #8: Dose 4 mg dominant
NA percentage of baseline measurement
Unavailable due to observation error by research nurse.
Quadriceps Femoris Muscle Strength
Leg #9: Dose 7 mg nondominant
NA percentage of baseline measurement
Unavailable due to observation error by research nurse.
Quadriceps Femoris Muscle Strength
Leg #10: Dose 10 mg nondominant
NA percentage of baseline measurement
Unavailable due to observation error by research nurse.
Quadriceps Femoris Muscle Strength
Leg #11: Dose 15 mg dominant
NA percentage of baseline measurement
Unavailable due to observation error by research nurse.
Quadriceps Femoris Muscle Strength
Leg #12: Dose 20 mg dominant
NA percentage of baseline measurement
Unavailable due to observation error by research nurse.
Quadriceps Femoris Muscle Strength
Leg #13: Dose 25 mg dominant
31 percentage of baseline measurement
Quadriceps Femoris Muscle Strength
Leg #14: Dose 30 mg dominant
52 percentage of baseline measurement
Quadriceps Femoris Muscle Strength
Leg #15: Dose 35 mg nondominant
27 percentage of baseline measurement
Quadriceps Femoris Muscle Strength
Leg #16: Dose 40 mg nondominant
74 percentage of baseline measurement
Quadriceps Femoris Muscle Strength
Leg #17: Dose 40 mg nondominant
49 percentage of baseline measurement
Quadriceps Femoris Muscle Strength
Leg #18: Dose 50 mg nondominant
13 percentage of baseline measurement
Quadriceps Femoris Muscle Strength
Leg #19: Dose 60 mg dominant
52 percentage of baseline measurement
Quadriceps Femoris Muscle Strength
Leg #20: Dose 60 mg dominant
28 percentage of baseline measurement
Quadriceps Femoris Muscle Strength
Leg #21: Dose 60 mg dominant
39 percentage of baseline measurement
Quadriceps Femoris Muscle Strength
Leg #22: Dose 60 mg nondominant
60 percentage of baseline measurement
Quadriceps Femoris Muscle Strength
Leg #23: Dose 70 mg dominant
40 percentage of baseline measurement
Quadriceps Femoris Muscle Strength
Leg #24: Dose 80 mg dominant
9 percentage of baseline measurement
Quadriceps Femoris Muscle Strength
Leg #25: Dose 80 mg dominant
81 percentage of baseline measurement
Quadriceps Femoris Muscle Strength
Leg #26: Dose 80 mg nondominant
41 percentage of baseline measurement
Quadriceps Femoris Muscle Strength
Leg #27: Dose 80 mg nondominant
11 percentage of baseline measurement
Quadriceps Femoris Muscle Strength
Leg #28: Dose 80 mg nondominant
37 percentage of baseline measurement

SECONDARY outcome

Timeframe: Baseline until 99 hours

Population: Each of 14 subjects had a different dose of medication administered to each the left and right sides, and therefore there were 14 subjects, 28 units analyzed.

We evaluated tolerance of transcutaneous electrical stimulation with the same quantitative procedure as described previously. Electrocardiogram pads were placed 2 cm medial to the distal quadriceps tendon and attached to a nerve stimulator (EZstimII, Model ES400; Life-Tech, Stafford, TX). The current was increased from 0 mA until subjects described mild discomfort, at which time the current was recorded as the tolerated level and the nerve stimulator turned off. All sensory measurements are expressed as a percentage of each patient's pre-infusion baseline.

Outcome measures

Outcome measures
Measure
Nerve Block
n=28 side of the body (left or right)
Exparel: liposome bupivacaine
Sensory Effect
Leg #7: Dose 3 mg Dominant
NA percentage of baseline measurement
Subject never exhibited a sensory block \>100% of baseline
Sensory Effect
Leg #1: Dose 0 mg nondominant
127 percentage of baseline measurement
Sensory Effect
Leg #2: Dose 0 mg nondominant
275 percentage of baseline measurement
Sensory Effect
Leg #3: Dose 0 mg nondominant
486 percentage of baseline measurement
Sensory Effect
Leg #4: Dose 0 mg dominant
209 percentage of baseline measurement
Sensory Effect
Leg #5: Dose 1 mg dominant
400 percentage of baseline measurement
Sensory Effect
Leg #6: Dose 2 mg Nondominant
NA percentage of baseline measurement
Subject never exhibited a sensory block \>100% of baseline
Sensory Effect
Leg #8: Dose 4 mg dominant
125 percentage of baseline measurement
Sensory Effect
Leg #9: Dose 7 mg nondominant
NA percentage of baseline measurement
Subject never exhibited a sensory block \>100% of baseline
Sensory Effect
Leg #10: Dose 10 mg nondominant
127 percentage of baseline measurement
Sensory Effect
Leg #11: Dose 15 mg dominant
300 percentage of baseline measurement
Sensory Effect
Leg #12: Dose 20 mg dominant
156 percentage of baseline measurement
Sensory Effect
Leg #13: Dose 25 mg dominant
107 percentage of baseline measurement
Sensory Effect
Leg #14: Dose 30 mg dominant
NA percentage of baseline measurement
Subject never exhibited a sensory block \>100% of baseline
Sensory Effect
Leg #15: Dose 35 mg nondominant
225 percentage of baseline measurement
Sensory Effect
Leg #16: Dose 40 mg nondominant
NA percentage of baseline measurement
Subject never exhibited a sensory block \>100% of baseline
Sensory Effect
Leg #17: Dose 40 mg nondominant
109 percentage of baseline measurement
Sensory Effect
Leg #18: Dose 50 mg nondominant
300 percentage of baseline measurement
Sensory Effect
Leg #19: Dose 60 mg dominant
150 percentage of baseline measurement
Sensory Effect
Leg #20: Dose 60 mg dominant
190 percentage of baseline measurement
Sensory Effect
Leg #21: Dose 60 mg dominant
157 percentage of baseline measurement
Sensory Effect
Leg #22: Dose 60 mg nondominant
200 percentage of baseline measurement
Sensory Effect
Leg #23: Dose 70 mg dominant
229 percentage of baseline measurement
Sensory Effect
Leg #24: Dose 80 mg dominant
363 percentage of baseline measurement
Sensory Effect
Leg #25: Dose 80 mg dominant
325 percentage of baseline measurement
Sensory Effect
Leg #26: Dose 80 mg nondominant
150 percentage of baseline measurement
Sensory Effect
Leg #27: Dose 80 mg nondominant
200 percentage of baseline measurement
Sensory Effect
Leg #28: Dose 80 mg nondominant
138 percentage of baseline measurement

Adverse Events

Nerve Block

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
Nerve Block
n=14 participants at risk
Exparel: liposome bupivacaine
Skin and subcutaneous tissue disorders
rash
7.1%
1/14 • Number of events 1

Additional Information

Brian Ilfeld, MD, MS

University California San Diego

Phone: 1-858-444-5949

Results disclosure agreements

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