The Efficacy and Safety of Liposomal Bupivacaine for Transversus Abdominis Plane Block in Relieving Postoperative Pain After Laparoscopic Surgery in Gynecologic Oncology

Official title

The Efficacy and Safety of Liposomal Bupivacaine Plus Bupivacaine Transversus Abdominis Plane Block for Postoperative Pain in Patients Undergoing Laparoscopic Surgery in Gynecologic Oncology:A Multi-Center Randomized Controlled Trial

Overview

Laparoscopic surgery, characterized by minimal invasiveness, rapid recovery, and shorter hospital stays, has been widely adopted in Gynecologic Oncology. However, the elevation and stretching of the diaphragm following pneumoperitoneum, combined with increased intra-abdominal pressure compressing visceral organs and causing ischemia-hypoxia, can trigger systemic inflammatory responses and lead to postoperLaparoscopic surgery, characterized by minimal invasiveness, rapid recovery, and shorter hospital stays, has been widely adopted in gynecological procedures. However, the elevation and stretching of the diaphragm following pneumoperitoneum, combined with increased intra-abdominal pressure compressing visceral organs and causing ischemia-hypoxia, can trigger systemic inflammatory responses and lead to postoperative pain. Inadequate or delayed pain management may prolong hospitalization, and some patients may develop chronic pain, resulting in altered behavioral patterns. As one of the analgesic strategies after abdominal surgery, transversus abdominis plane block (TAPB) not only reduces opioid consumption and the incidence of complications but also avoids adverse effects associated with epidural analgesia. Nevertheless, the analgesic duration provided by a single-injection TAPB is limited, while continuous TAPB faces constraints in clinical application due to challenges such as catheter fixation.Inadequate or delayed pain management may prolong hospitalization, and some patients may develop chronic pain, resulting in altered behavioral patterns. As one of the analgesic strategies after abdominal surgery, TAPB not only reduces opioid consumption and the incidence of complications but also avoids adverse effects associated with epidural analgesia. Nevertheless, the analgesic duration provided by a single-injection TAPB is limited, while continuous TAPB faces constraints in clinical application due to challenges such as catheter fixation. Liposomal bupivacaine(LB) is a novel, long-acting, sustained-release amide-type local anesthetic, providing localized analgesic effects for up to 72 hours.However, its efficacy and safety in laparoscopic surgery not yet been fully validated. Based on this premise, the present study aims to evaluate and compare the clinical outcomes of Ultrasound-guided TAPB utilizing liposomal bupivacaine plus bupivacaine for postoperative pain management in patients undergoing Laparoscopic Surgery in Gynecologic Oncology.

Interventions

• Drug Bupivacaine hydrochloride
  Prior to surgical incision, the Doppler ultrasound-guided injection technique will be employed. A bilateral transverse abdominis plane block(TAPB) will be performed using a 22-gauge block needle, with 20 mL of 0.25% bupivacaine administered per side. The patient-controlled analgesia (PCA) pump solution consists of 100 μg sufentanil and 16 mg ondansetron diluted with normal saline to a total volume of 100 mL. Postoperatively, patients may self-administer a 2-mL bolus per demand, with a lockout in
• Drug Liposomal bupivacaine plus bupivacaine
  Prior to surgical incision, the Doppler ultrasound-guided injection technique will be employed. A bilateral transverse abdominis plane block(TAPB) will be performed using a 22-gauge block needle, 20 mL (266 mg) of liposomal bupivacaine will be mixed with 20 mL of 0.25% bupivacaine hydrochloride (50 mg, diluted in normal saline) to prepare a 40 mL solution. A volume of 20 mL will be administered to each side.The patient-controlled analgesia (PCA) pump solution consists of 100 μg sufentanil and 16

Primary outcome measures

• Intravenous Morphine Equivalents of Rescue Analgesic Medications Within 48 Hours Postoperatively [Time frame: The postoperative period 48 hours.]

Secondary outcome measures (12)

• Area Under the Curve (AUC) of Numeric Rating Scale at rest (NRSr) Within 0-72 Hours Postoperatively [Time frame: Data will be collected at 2 hours, 24 hours, 48 hours, and 72 hours postoperatively.]
• Area under the curve (AUC) of the Numerical Rating Scale during movement (NRSm) within 0-72 hours postoperatively [Time frame: Data will be collected at 2 hours, 24 hours, 48 hours, and 72 hours postoperatively.]
• Numeric Rating Scale at rest (NRSr) at 1 week, 1 month, and 3 months postoperatively [Time frame: Postoperative day 7, month 1, and month 3.]
• Numeric Rating Scale during movement (NRSm) at 1 week, 1 month, and 3 months postoperatively [Time frame: Postoperative day 7, month 1, and month 3.]
• Time to request of first analgesia [Time frame: Within 48 hours postoperatively.]
• Cumulative sufentanil dose for four separate periods (0-4, 4-8, 8-24, and 24-48 h), a total press count including both valid and invalid presses [Time frame: Postoperative Hours 4, 8, 24, and 48.]
• Duration days of Oral Oxycodone and Acetaminophen Tablets Administration [Time frame: Within 3 months postoperatively.]
• Total dosage of orally oxycodone and acetaminophen tablets [Time frame: Within 3 months postoperatively.]
• Intraoperative Anesthetic Dosage [Time frame: During the surgical anesthesia phase.]
• Patient Satisfaction Scale，PSS [Time frame: Postoperative hours 2, 24, 48, and 72; week 1; month 1; and month 3.]
• Ramsay Sedation Scale，RSS [Time frame: Postoperative at 2 hours, 24 hours, 48 hours, and 72 hours.]
• Quality of Recovery-40，QoR-40 [Time frame: Postoperative hours 24, 48, and 72.]

Eligibility criteria

Inclusion criteria

• Patients scheduled for elective Laparoscopic Surgery in Gynecologic Oncology under general anesthesia;
• Ages 18 to 64 years old；
• American Society of Anesthesiologists (ASA) physical status of I-III；
• Glasgow Coma Scale (GCS) score of 15；
• Patients must be able to understand the nature and potential personal consequences of the clinical trial, signing of the informed consent form.

Exclusion criteria

• History of chronic pain syndrome of any cause.
• Patients with heart conduction block (sinus block or atrioventricular block).
• Patients with unstable coronary artery disease.
• Patients with gastric ulcer or gastric bleeding.
• Patients with diabetes and are being treated with insulin.
• Subjects with coagulation dysfunction (prothrombin time or activated partial thromboplastin time is higher than the normal threshold) or patients who are taking oral anticoagulants for other medical reasons and have not stopped it before surgery, such as warfarin or new anticoagulants rivaroxaban or dabigatran.
• Patients with abnormal liver function: alanine aminotransferase (ALT) and/or aspartate aminotransferase (AST) > 2× the upper limit of normal (ULN) or total bilirubin (TBIL) ≥ 1.5×ULN.
• Patients with renal impairment (serum creatinine > 176 µmol/L) or receiving dialysis treatment within 28 days before surgery.
• Patients with a history of diagnosed mental illness or currently taking psychotropic medication.
• Excessive alcohol or drug abuse, chronic opioid use (more than 2 weeks or 3 days per week for more than 1 month), use of drugs with confirmed or suspected sedative or analgesic effects, or use of any painkiller within 24 h before surgery.
• Pregnancy or breastfeeding.
• Extreme body mass index (BMI) (< 15 or > 35).
• Participation in another interventional trial that interferes with the intervention or outcome of this trial.
• Patients with a history of allergy to local anaesthetics or one of the study drugs.

Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.

Healthy volunteers: No

Study design

Allocation

Randomized

Model

Parallel assignment

Masking

Quadruple blind

Primary purpose

Prevention

Study locations

China · 1 center

• Beijing Tiantan Hospital — Beijing

Publications

• Korkmaz Toker M, Altiparmak B, Uysal AI, Demirbilek SG. The analgesic efficacy of oblique subcostal transversus abdominis plane block after laparoscopic hysterectomy: A randomized, controlled, observer-blinded study. Medicine (Baltimore). 2019 Jan;98(1):e13994. doi: 10.1097/MD.0000000000013994. PMID 30608444
• Hutchins J, Vogel RI, Ghebre R, McNally A, Downs LS Jr, Gryzmala E, Geller MA. Ultrasound-guided subcostal transversus abdominis plane infiltration with liposomal bupivacaine for patients undergoing robotic-assisted hysterectomy: a retrospective study. Int J Gynecol Cancer. 2015 Jun;25(5):937-41. doi: 10.1097/IGC.0000000000000429. PMID 25790044
• McDonald V, Wang Y, Patel A, Betcher R, Fontenot AC, Scoggin S, Black D. Laparoscopic guided liposomal bupivacaine injection compared to transversus abdominus plane block for postoperative pain after robotic gynecologic oncology surgery. Gynecol Oncol. 2022 Sep;166(3):432-437. doi: 10.1016/j.ygyno.2022.06.006. Epub 2022 Jul 9. PMID 35817618

Identifiers

NCT: NCT07458295 · KY2025-289-02-6

Primary sources (government registries)

• ClinicalTrials.gov (US NIH)

View this study on ClinicalTrials.gov ↗