Evidence map›Paper›PMID 23591549›Full record

Trial reportObesity surgery2013

Ultrasound-guided transversus abdominis plane (TAP) block for laparoscopic gastric-bypass surgery: a prospective randomized controlled double-blinded trial.

Eric Albrecht, Kyle R Kirkham, Ryan V W Endersby, Vincent W S Chan, Timothy Jackson, Allan Okrainec, Todd Penner, Rongyu Jin, Richard Brull

Registry-linked trialAbstract readRandomized Controlled Trial
PubMed Publisher
In one paragraph

Trial report in Obesity surgery, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT04073056 (Quadratus Lumborum II Block vs Conventional Therapy Alone For Laparoscopic Sleeve Gastrectomy), which is not on this map. Cited by 49 papers, 13 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
49citing papers in PubMed, 13 pooled it
5.8field-weighted citation impact, top 4% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

NCT04073056 phase4completednot on this mapstarted 2018, after this paper: background citation

Quadratus Lumborum II Block vs Conventional Therapy Alone For Laparoscopic Sleeve Gastrectomy

TypeinterventionalSponsorIcahn School of Medicine at Mount SinaiRan2018 to 2021Enrolled41ConditionsMorbid Obesity, High BMIArmsBupivacaine
3 · Its place in the literature

Who cites it

49 citing papers in PubMed, 13 syntheses or guidelines pooled it, 101 citations in OpenAlex.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

9 authors at 2 institutions in 1 country.

Eric AlbrechtDepartment of Anesthesia and Pain Management, Toronto Western Hospital, University of Toronto, 399 Bathurst Street, Toronto, ON M5T 2S8, Canada.
Kyle R Kirkham
Ryan V W Endersby
Vincent W S Chan
Timothy Jackson
Allan Okrainec
Todd Penner
Rongyu Jin
Richard Brull
University of Toronto · CAToronto Western Hospital · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundDespite the laparoscopic approach, patients can suffer moderate to severe pain following bariatric surgery. This randomized controlled double-blinded trial investigated the analgesic efficacy of ultrasound-guided transversus abdominis plane (TAP) blocks for laparoscopic gastric-bypass surgery.

methodsSeventy patients undergoing laparoscopic gastric-bypass surgery were randomized to receive either bilateral ultrasound-guided subcostal TAP block injections after induction of general anesthesia or none. All patients received trocar insertion site local anesthetic infiltration and systemic analgesia. The primary outcome was cumulative opioid consumption (IV morphine equivalent) during the first 24 h postoperatively. Interval opioid consumption, pain severity scores, rates of nausea or vomiting, and rates of pruritus were measured during phase I recovery, and at 24 and 48 h postoperatively.

resultsThere was no difference in cumulative opioid consumption during the first 24 h postoperatively between the TAP (32.2 mg [95% CI, 27.6-36.7]) and control (35.6 mg [95% CI, 28.6-42.5]; P = 0.41) groups. Postoperative opioid consumptions during phase I recovery and the 24-48-h interval were similar between groups, as were pain scores at rest and with movement during all measured intervals. The rates of nausea or vomiting and pruritus were equivalent.

conclusionsBilateral TAP blocks do not provide additional analgesic benefit when added to trocar insertion site local anesthetic infiltration and systemic analgesia for laparoscopic gastric-bypass surgery.

Indexed as

Abdominal MusclesGastric BypassNerve BlockPostoperative PainUltrasonography, InterventionalAdolescentAdultAgedAnalgesics, OpioidAnesthesia, GeneralCanadaDouble-Blind MethodFemaleHumansMaleMiddle AgedAnalgesics, Opioid

Identifiers

PMID23591549
OpenAlexW2050170584

What OpenQuestion holds

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Read underepoch 390

Registered trials

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.