Pharmacokinetics and Safety of Bupivacaine HCl Spinal Block and EXPAREL Local Infiltration in Total Knee Arthroplasty

Phase 4

Completed

• Conditions: Pain
• Interventions: Drug: Bupivacaine SNB; Drug: EXPAREL Infiltration

• Registration Number: NCT02284386
• Lead Sponsor: Pacira Pharmaceuticals, Inc

Brief Summary

This is a Phase 4, multicenter, open-label study designed to characterize the pharmacokinetic (PK) profile of total bupivacaine in approximately 15 adult subjects undergoing primary unilateral total knee arthroplasty (TKA) with bupivacaine hydrochloride (HCl) spinal nerve block (SNB) and EXPAREL local infiltration into the surgical site.

Detailed Description

On Day 1, following an epinephrine "wash" of the spinal block syringe, eligible subjects will receive a single 1.6 mL dose of bupivacaine HCl 7.5 mg/mL within 2 hours prior to the surgical procedure as a spinal block. EXPAREL 266 mg in 20 mL (expanded with 70 mL of preservative-free sterile normal saline to a total volume of 90 mL) will be infiltrated into the surgical site at the end of the surgery prior to wound closure. There will be no local co-administration of the two drugs.

Blood samples for bupivacaine PK analysis will be obtained from subjects at baseline (prior to bupivacaine HCl administration for nerve block), 15 minutes, 30 minutes, and 1, 2, 4, 8, 12, 24, 48, and 72 hours after the beginning of EXPAREL administration, and on Day 14.

Study Timeline

• Study First Submitted: 2014-11-03
• Study First Submitted QC: 2014-11-03
• Study First Posted: 2014-11-06
• Study Start: 2014-12
• Primary Completion: 2015-03
• Study Completion: 2015-03
• Results First Submitted: 2016-05-20
• Results First Submitted QC: 2016-05-20
• Results First Posted: 2016-06-28
• Status Verified: 2021-02
• Last Update Submitted: 2021-02-11
• Last Update Posted: 2021-03-08

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 15

Inclusion Criteria

1. Males or females ≥18 years of age.
2. American Society of Anesthesiologists (ASA) physical status 1, 2, or 3.
3. Scheduled to undergo spinal block in conjunction with unilateral TKA.
4. Female subjects must be surgically sterile, at least 2 years postmenopausal, or using a medically acceptable method of birth control. Females of childbearing potential must have a documented negative blood or urine pregnancy test result within 24 hours before surgery.
5. Able to provide informed consent, adhere to the study schedule, and complete all study assessments.

Exclusion Criteria

1. History of hypersensitivity or idiosyncratic reactions to amide-type local anesthetics or opioids.

2. Contraindication to bupivacaine.

3. Received bupivacaine or any other local anesthetic within 7 days of EXPAREL administration.

4. Currently pregnant, nursing, or planning to become pregnant during the study or within 1 month after EXPAREL administration.

5. Planned concurrent surgical procedure (e.g., bilateral TKA).

6. Body weight <50 kg (110 pounds) or a body mass index ≥45 kg/m2.

7. Received any investigational drug within 30 days prior to EXPAREL administration, and/or has planned administration of another investigational product or procedure during the subject's participation in this study.

8. Previous participation in an EXPAREL study.

9. Malignancy in the last 2 years, with the exception of non-metastatic basal cell or squamous cell carcinoma of the skin or localized carcinoma in situ of the cervix.

10. Current or historical evidence of any clinically significant disease or condition, especially cardiovascular or neurological conditions that, in the opinion of the Investigator, may increase the risk of surgery or complicate the subject's postsurgical course.

11. Clinically significant medical or psychiatric disease that, in the opinion of the Investigator, would constitute a contraindication to participation in the study, or cause inability to comply with the study requirements.

    In addition, the subject will be ineligible to receive EXPAREL if he or she meets the following criteria during surgery:

12. Any clinically significant event or condition uncovered during the surgery (e.g., excessive bleeding, acute sepsis) that might render the subject medically unstable or complicate the subject's postsurgical course.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
Bupivacaine SNB + EXPAREL Infiltration	EXPAREL Infiltration	Spinal block with bupivacaine HCl 7.5 mg/mL. Local infiltration of EXPAREL 266 mg.
Bupivacaine SNB + EXPAREL Infiltration	Bupivacaine SNB	Spinal block with bupivacaine HCl 7.5 mg/mL. Local infiltration of EXPAREL 266 mg.

Primary Outcome Measures

Name	Time	Method
Maximum Plasma Concentration (Cmax)	baseline, 15,30 min, 1,2,4,8,12,24,48,72 hours post dose, day 14
Time to Peak Plasma Concentration (Tmax)	baseline, 15,30 min, 1,2,4,8,12,24,48,72 hours post dose, day 14
Area Under the Plasma Concentration Versus Time Curve From Time 0 to the Last Collection Time After Drug Administration (AUC0-last)	baseline, 15,30 min, 1,2,4,8,12,24,48,72 hours post dose, day 14
Area Under the Plasma Concentration Versus Time Curve From Time 0 Extrapolated to Infinity After Drug Administration (AUC0-∞)	baseline, 15,30 min, 1,2,4,8,12,24,48,72 hours post dose, day 14
The Apparent Terminal Elimination Rate Constant (λz)	baseline, 15,30 min, 1,2,4,8,12,24,48,72 hours post dose, day 14
The Apparent Terminal Elimination Half-life (t1/2el)	baseline, 15,30 min, 1,2,4,8,12,24,48,72 hours post dose, day 14

Trial Locations

Locations (2)

University of Minnesota Medical Center - Fairview, West Bank; 🇺🇸 Minneapolis, Minnesota, United States

Shaols Medical Trials, Inc.; 🇺🇸 Sheffield, Alabama, United States