Liposomal vs. Conventional Bupivacaine for Pain Control

NCT ID: NCT06231355

Last Updated: 2025-07-30

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

PHASE4

Total Enrollment

61 participants

Study Classification

INTERVENTIONAL

Study Start Date

2024-02-21

Study Completion Date

2024-10-14

Brief Summary

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The goal of this pilot study is to test the hypothesis that liposomal bupivacaine extends the duration of paravertebral block in patients undergoing radical nephrectomy, achieving improved analgesia compared to conventional bupivacaine. The main questions it aims to answer are:

* Area under curve of numeric rating scale of pain from 12 to 72 h after surgery.
* Cumulative opioid consumption during the period of 12 to 72 h after surgery.

Detailed Description

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Random numbers will be generated by an independent biostatistician in a 1:1 ratio, sealed in sequentially numbered opaque envelopes, and stored by a study coordinator. Only anesthesiologists who perform paravertebral block know group allocation but are not involved in other parts of the trial. Patients, other health-care team members, and investigators for data collection and outcome assessment are masked from group assignments.

Paravertebral block will be performed with either liposomal bupivacaine or plain bupivacaine. The efficacy of nerve block will be assessed every 5 minutes after local anesthetic injection. We will evaluate pain severity, opioid consumption, and occurrence of adverse events at the following timepoints, i.e., end of surgery, 30 minutes after surgery, and 2, 6, 12, 24, 36, 48, 60, and 72 hours after surgery. Additionally, occurrence of complications, quality of recovery, and subjective sleep quality will be assessed during hospital stay after surgery.

Conditions

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Local Anesthetics Analgesia Regional Block Paravertebral Block

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

TRIPLE

Participants Caregivers Outcome Assessors

Study Groups

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Lipo-bupivacaine

Paravertebral block is performed with liposomal bupivacaine.

Group Type EXPERIMENTAL

Performing paravertebral nerve block with lipo-bupivacaine

Intervention Type DRUG

Paravertebral block is performed using liposomal bupivacaine.

Bupivacaine

Paravertebral block is performed with bupivacaine.

Group Type ACTIVE_COMPARATOR

Performing paravertebral nerve block with bupivacaine

Intervention Type DRUG

Paravertebral block is performed using bupivacaine.

Interventions

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Performing paravertebral nerve block with lipo-bupivacaine

Paravertebral block is performed using liposomal bupivacaine.

Intervention Type DRUG

Performing paravertebral nerve block with bupivacaine

Paravertebral block is performed using bupivacaine.

Intervention Type DRUG

Other Intervention Names

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艾恒平 (Ai Heng Ping) Bupivacaine liposome injection Bupivacaine injection

Eligibility Criteria

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Inclusion Criteria

* Age between 18 and 70 years old.
* Scheduled for laparoscopic-assisted unilateral radical nephrectomy.
* Agree to undergo regional nerve blockade and receive patient-controlled intravenous analgesia after surgery.

Exclusion Criteria

* Renal cancer with venous thrombus of grade II or higher, or cases that may convert to open surgery.
* Body mass index ≥30 kg/m² or ≤15 kg/m².
* Severe renal dysfunction (serum creatinine \>442 μmol/L or requiring renal replacement therapy), severe liver dysfunction (Child-Pugh class C), or American Society of Anesthesiologists class ≥IV.
* Contraindications for deep nerve block, including severe spinal deformity or history of spinal surgery, severe coagulation abnormalities (international normalized ratio \>1.7, activated partial thromboplastin time \>4 seconds above normal, platelet count \<80×10⁹/L), trauma or infection at the planned puncture site, or severe lumbar back pain.
* Chronic opioid dependence and long-term use of various analgesics for more than 3 months.
* Preoperative inability to communicate due to severe dementia, language barriers, or end-stage diseases.
* Preoperative concomitant central nervous system and/or peripheral nervous system diseases.
* Planned endotracheal intubation and admission to the intensive care unit after surgery.
* Known allergy to local anesthetics.
* Other conditions that are deemed unsuitable for trial participation by the attending surgeons or investigators.
Minimum Eligible Age

18 Years

Maximum Eligible Age

70 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Peking University First Hospital

OTHER

Sponsor Role lead

Responsible Party

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Dong-Xin Wang

Professor

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

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Dong-Xin Wang, MD, PhD

Role: PRINCIPAL_INVESTIGATOR

Peking University First Hospital

Locations

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Peking University First Hospital

Beijing, Beijing Municipality, China

Site Status

Countries

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China

References

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Other Identifiers

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2023-553

Identifier Type: -

Identifier Source: org_study_id

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