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Transverse Abdominus Plane Block Study

Effect of Laparoscopic-Guided Transversus Abdominus Plane (TAP) Block on Opioid Consumption Using Dual-Adjunct Therapy With Dexmedetomidine and Dexamethasone Versus Liposomal Bupivacaine (Exparel®) Following Minimally Invasive Colorectal Surgery: A Single-Blinded Randomized Clinical Trial.

Status
Withdrawn
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05216055
Acronym
TAP
Enrollment
0
Registered
2022-01-31
Start date
2022-04-19
Completion date
2022-12-27
Last updated
2023-03-06

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Colorectal Disorders, Surgery

Keywords

Benign, Malignant, Laparoscopic Surgery, Robotic Surgery, Hybrid Surgery

Brief summary

Study the effect of laparoscopic guided TAP block on opioid consumption and associated costs using a mixture of dexmedetomidine, dexamethasone, and ropivacaine versus Liposomal bupivacaine (Exparel®) in patients who undergo elective minimally invasive colorectal surgery.

Detailed description

This is a non-inferiority single-blinded randomized trial aiming to study the effect of laparoscopic guided TAP block on opioid consumption and associated costs using a mixture of dexmedetomidine, dexamethasone, and ropivacaine versus Liposomal bupivacaine (Exparel®) in patients who undergo elective minimally invasive colorectal surgery. This study aims to continue improving our current hospital wide effort in reducing opioid consumption and, consequently, the acute and long-term consequences of opioids. It will also complement the current ongoing efforts of the Department of Surgery's quality and safety improvement project in opioid stewardship. Additionally, this dual adjunct TAP solution combination is inexpensive ($28 per injection) and may result in a significant cost savings for the hospital.

Interventions

COMBINATION_PRODUCTRopivacaine, Dexmedetomidine, Dexamethasone sodium phosphate, Normal saline

Ropivacaine 0.5% HCl, 40 mL (5 mg per mL) (200 mg) Dexmedetomidine HCl, 0.50 ml (100 ug per mL) (50 ug) Dexamethasone sodium phosphate, 1 mL (10 mg per mL) (10 mg) Normal saline 0.9%, 18.5mL

DRUGLiposomal bupivacaine

Liposomal bupivacaine, 20 mL (13.3 mg/ml) (266 mg) Normal saline 0.9%, 40mL

Sponsors

University of Colorado, Denver
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
SUPPORTIVE_CARE
Masking
SINGLE (Subject)

Masking description

This study is a randomized single blinded trial to minimize bias and provide highest level of evidence in use as part of effort to reduce opioid use consumption. This study cannot be performed as a double blinded RCT due to Exparel being milky white color in appearance and cannot be altered or shielded from being visible by the operating surgeon performing the TAP block.

Eligibility

Sex/Gender
ALL
Age
18 Years to 100 Years
Healthy volunteers
No

Inclusion criteria

* provision to sign and date the consent form. * stated willingness to comply with all study procedures and be available for the duration of the study. * Male and female patients aged 18 and older * Benign or malignant colorectal disease undergoing laparoscopic, robotic, or a hybrid (minimally invasive dissection with a 6-8 cm incision to complete the surgery) colorectal resection with or without an ostomy

Exclusion criteria

* Pregnant or breastfeeding patients * Medical conditions that may interfere with the use of the study medications (e.g., drug allergy), * Patients with opioid dependence defined as chronic opioid use more than 3 times per week preoperatively * Incarcerated individuals * Age less than 18 years-old * Urgent/emergent operations as defined by need for operation within 24 hours * Other conditions or general disability or infirmity that in the opinion of the investigator precludes further participation in the study. * Enrollment in another concurrent study with use of investigational drugs

Design outcomes

Primary

MeasureTime frameDescription
Outpatient narcotic refill2 monthsUse the EMR to determine outpatient narcotic refill
Visual analog scale pain scores in the PACU72 hoursVisual analog scale (VAS) pain scores in the PACU
Visual analog scale pain scores 12 hours post op12 hoursVisual analog scale pain scores 12 hours post op
Visual analog scale pain scores 36 hours post op36 hoursVisual analog scale pain scores 36 hours post op
Visual analog scale pain scores 48 hours post op48 hoursVisual analog scale pain scores 48 hours post op
Visual analog scale pain scores 72 hours post op72 hoursVisual analog scale pain scores 72 hours post op
Epidural need2 monthsNeed for an epidural post-operatively. Reviewed using the EMR.
Need for postoperative patient-controlled analgesia (PCA)72 hoursDetermined by review of EMR. Patients use or non-use of PCA.
Need for adjunctive systemic nonopioid pain medications2 monthsAdjunctive systemic nonopioid pain medications
Prescribed opioid at discharge2 monthsAmount of opioid prescribed at discharge
Visual analog scale pain scores 24 hours post op24 hoursVisual analog scale pain scores 24 hours post op
Post-operative opioid consumption in the first 72 hours72 hoursTotal amount of both intravenous and oral opioid use in the first 72 hours after surgery measured in morphine milligram equivalents.
Post-operative opioid consumption over hospital stay2 monthsTotal morphine dose equivalents administered throughout hospital stay

Secondary

MeasureTime frameDescription
Time to first bowel movement2 monthsDays from surgery to first bowel movement postoperatively. Reviewed using the EMR.
Length of hospital stay2 monthsTo assess the impact of laparoscopic guided TAP blocks and dual-adjunct therapy on length of hospital stay following minimally invasive (laparoscopic or robotic) surgery of the colon and rectum. Calculating the length of hospital stay will allow for evaluation of effectiveness of dual adjunct therapy in context of ERAS protocol compared to liposomal bupivacaine
Use of antiemetics in the first 12 hours post op12 hoursTo assess the impact of laparoscopic guided TAP blocks and dual-adjunct therapy on return of bowel function following minimally invasive (laparoscopic or robotic) surgery of the colon and rectum. Antiemetic dosage reviewed using the EMR.
Use of antiemetics in the first 24 hours post op24 hoursTo assess the impact of laparoscopic guided TAP blocks and dual-adjunct therapy on return of bowel function following minimally invasive (laparoscopic or robotic) surgery of the colon and rectum. Antiemetic dosage reviewed using the EMR.
Use of antiemetics in the first 36 hours post op36 hoursTo assess the impact of laparoscopic guided TAP blocks and dual-adjunct therapy on return of bowel function following minimally invasive (laparoscopic or robotic) surgery of the colon and rectum. Antiemetic dosage reviewed using the EMR.
Use of antiemetics in the first 48 hours post op48 hoursTo assess the impact of laparoscopic guided TAP blocks and dual-adjunct therapy on return of bowel function following minimally invasive (laparoscopic or robotic) surgery of the colon and rectum. Antiemetic dosage reviewed using the EMR.
Use of antiemetics in the first 72 hours post op72 hoursTo assess the impact of laparoscopic guided TAP blocks and dual-adjunct therapy on return of bowel function following minimally invasive (laparoscopic or robotic) surgery of the colon and rectum. Antiemetic dosage reviewed using the EMR.
Need to insert nasogastric tube2 monthsTo assess the impact of laparoscopic guided TAP blocks and dual-adjunct therapy on return of bowel function following minimally invasive (laparoscopic or robotic) surgery of the colon and rectum. Reviewed using the EMR.
Time to first flatus2 monthsDays from surgery to first flatus postoperatively. Reviewed using the EMR.

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026