Randomized Clinical Trial Comparing Laparoscopic Versus Ultrasound-Guided Transversus Abdominis Plane Block in Minimally Invasive Colorectal Surgery

The 2024 Korean Enhanced Recovery After Surgery (ERAS) guidelines for colorectal cancer: a secondary publication

The Korean Enhanced Recovery After Surgery (ERAS) Committee within the Korean Society of Surgical Metabolism and Nutrition was established to develop ERAS guidelines tailored to the Korean context. This guideline focuses on creating the most current evidence-based practice guidelines for ERAS purposes, based on systematic reviews. All key questions targeted randomized controlled trials exclusively, and if fewer than 2 were available, studies employing propensity score matching were also included. Recommendations for each key question were marked with strength of recommendation and level of evidence following internal and external review processes by the committee.

Ultrasound-guided vs. laparoscopic-guided transversus abdominis plane block for postoperative pain following laparoscopic cholecystectomy: a systematic review and meta-analysis

BACKGROUND

Postoperative pain following laparoscopic cholecystectomy (LC) is a major concern. The transversus abdominis plane block (TAPB) is one of the anesthetic techniques that has been developed to address this issue. The TAPB can be delivered by the guidance of either ultrasound (UTAPB) or laparoscopic (LTAPB). Our aim is to compare the efficacy of these guidance methods in reducing postoperative pain after LC.

METHODS

A systematic search was performed in PubMed, Scopus, Cochrane, and Web of Science databases from inception to June 2024 for randomized studies comparing the delivery of TAPB under ultrasound and laparoscopic guidance. Data analysis was conducted using Review Manager V5.4.

RESULTS

Five randomized studies were included in our study. UTAPB was significantly more effective in reducing postoperative pain after 6 h compared to LTAPB (MD =  - 0.38, 95% CI, - 0.67 to 0.09, p = 0.01). However, UTAPB was insignificantly more effective than LTAPB in reducing postoperative pain after 12 h (MD =  - 0.14, 95% CI, - 0.44 to 0.17, p = 0.39), 24 h (MD =  - 0.09, 95% CI, - 0.41 to 0.23, p = 0.60), and 48 h (MD =  - 0.12, 95% CI, - 0.44 to 0.19, p = 0.44). UTAPB insignificantly resulted in decreased opioid consumption (SMD: - 0.09; 95% CI: - 0.42, 0.25; p = 0.62) and less postoperative nausea and vomiting (OR = 0.73, 95% CI, 0.21 to 2.51, p = 0.62) in comparison with LTAPB.

CONCLUSION

Ultrasound guidance of TAPB offers superior pain relief in the setting of LC, especially in the early postoperative period. Further trials are needed to prove and support the results.

Transversus abdominis plane block in minimally invasive colon surgery: a multicenter three-arm randomized controlled superiority and non-inferiority clinical trial

BACKGROUND AND OBJECTIVES

The transversus abdominis plane (TAP) block is the most widely used abdominal field block in colorectal surgery with a postoperative enhanced recovery pathway. We aimed to determine whether the laparoscopic-assisted and ultrasound-guided TAP (US-TAP) blocks provide superior pain relief compared with placebo. We separately investigated whether the laparoscopic-assisted technique was non-inferior to the ultrasound-guided technique in providing pain relief, with a non-inferiority margin of 10 mg morphine dose equivalents.

METHODS

340 patients undergoing elective minimally invasive colon surgery were randomly allocated to one of three groups: (1) US-TAP block, (2) laparoscopic-assisted TAP (L-TAP) block, or (3) placebo. Superiority and non-inferiority were tested for the primary outcome: 24-hour postoperative morphine equivalent consumption. Secondary outcomes, including patient-reported quality of recovery, were included in the superiority analysis.

RESULTS

127 patients were included in each block group and 86 in the placebo group. The US-TAP block was no different from placebo at -1.4 mg morphine (97.5% CI -6.8 to 4.0 mg; p=0.55). The L-TAP block was superior to placebo at -5.9 mg morphine (97.5% CI -11.3 to -0.5 mg; p=0.01) and non-inferior to the US-TAP block at -4.5 mg morphine (98.75% CI -10.0 to 1.1 mg).

CONCLUSION

The L-TAP block was superior to placebo and non-inferior to the US-TAP block. However, neither met our predetermined estimate of the minimal clinically important difference of 10 mg morphine.

TRIAL REGISTRATION NUMBER

NCT04311099.

The Efficacy of Transversus Abdominis Plane (TAP) Blocks When Completed by Anesthesiologists Versus by Surgeons: A Systematic Review and Meta-Analysis

Background/Objectives: Current literature has demonstrated the benefits of transversus abdominis plane (TAP) blocks for reducing postoperative pain and opioid consumption for an array of surgical procedures. Some randomized controlled trials and retrospective studies have compared ultrasound guidance TAP blocks completed by anesthesiologists (US-TAP) to laparoscopic guidance TAP blocks completed by surgeons (LAP-TAP). However, the findings of these studies have not been consolidated to improve recommendations and patient outcomes. Our objective is to consolidate and summarize current literature regarding the efficacy of TAP blocks for postoperative pain control and opioid consumption when performed with ultrasound guidance (US-TAP, compared to laparoscopic guidance (LAP-TAP). Methods: We performed a systematic review and meta-analysis of RCTs and retrospective studies to evaluate US-TAP versus LAP-TAP blocks for postoperative pain control and opioid consumption. We searched PubMed/MEDLINE, CINAHL, Cochrane, and Web of Science databases for all articles meeting the search criteria until the time of article extraction in February 2024. The primary outcome variables were postoperative pain scores and opioid consumption. The secondary outcome variables were complications, time taken to perform the block, length of stay (LOS) in the hospital, and cost of performing the block. Results: Of the 1673 articles initially identified, 18 studies met the inclusion criteria for evaluation. Of the included studies, 88.9% and 77.8% found no significant difference in postoperative pain scores or opioid consumption, respectively, between US-TAP and LAP-TAP groups. Six studies (33.3%) found that LAP-TAP was faster to perform than US-TAP. Meta-analysis demonstrated no statistically significant differences in postoperative pain scores or opioid consumption between groups but showed that block times were significantly longer in the US-TAP group. Conclusions: US-TAP and LAP-TAP blocks may be equivocal in terms of reducing postoperative pain and opioid consumption. LAP-TAPs may be less time-consuming and more cost-effective and viable alternatives to US-TAP blocks in the perioperative setting.

Comparing Ultrasound- and Laparoscopic-Guided Transversus Abdominis Plane (TAP) Blocks in Sleeve Gastrectomy Patients

Introduction Obesity is a major disease process in the United States with increasing prevalence and is associated with various comorbid conditions. Bariatric surgery, particularly laparoscopic sleeve gastrectomy (LSG), is an effective weight loss intervention but presents challenges in postoperative pain management. This study compares the effectiveness of ultrasound-guided transversus abdominis plane (UTAP) blocks, laparoscopic-guided transversus abdominis plane (LTAP) blocks, and no regional anesthesia on overall opioid use and postoperative outcomes in LSG patients. Methods This retrospective cohort study included 1,239 obese patients who underwent LSG at a single hospital from January 2019 to June 2023. Patients were categorized into the following three groups: UTAP, LTAP, and no TAP. The primary outcome was the total morphine milligram equivalents (MME) used within the first 24 h and 48 h, and the average amount of MME during the hospital stay (all reported in median interquartile ranges). Secondary outcomes included total anesthesia time, postoperative pain scores, length of stay (LOS), 30-day readmission, and emergency room visit rates. Statistical analyses included chi-square tests, Fisher's exact test, independent t-tests, Mann-Whitney U tests, and multiple linear regression. Results The UTAP group had significantly lower median MME within the first 24 h (63 MME) compared to the LTAP group (98.8 MME, p<0.0001) and throughout the hospital stay (93 MME vs. 120 MME, p=0.0004). Both UTAP and LTAP groups had significantly lower total MME compared to the no TAP group (p<0.0001 for both). Total anesthesia time was longer for UTAP (98.5 min) compared to LTAP (92.5 min, p=0.0472). LOS was significantly longer in the UTAP group (1.59 days) compared to LTAP (1.18 days, p=0.0061). There were no significant differences in pain scores at various time points or in 30-day readmission and emergency room visit rates between the UTAP and LTAP groups. Conclusion UTAP blocks demonstrated reduced opioid use compared to LTAP and no TAP, likely due to enhanced accuracy with ultrasound guidance. Further prospective studies are warranted to confirm these findings and refine pain management strategies for bariatric surgery patients.

Robotic colorectal resections are associated with less postoperative pain, decreased opioid use, and earlier return to work as compared to the laparoscopic approach

While robotic and laparoscopic surgeries are both minimally invasive in nature, they are intrinsically different approaches and it is critical to understand outcome differences between the two. Studies evaluating pain outcomes and opioid requirement differences between the robotic and laparoscopic colorectal resections are conflicting and often underpowered. In this retrospective, cohort study, we compare postoperative opioid requirements, reported as morphine milligram equivalents (MME), postoperative average and highest pain scores across postoperative days (POD) 0-5, and return to work in patients who underwent robotic versus laparoscopic colorectal resections. The sample size was selected based on power calculations. Daily pain scores and MME were used as outcomes in linear mixed effect models with unstructured covariance between time points. Propensity score weighting was used to adjust for imbalances. Patients in the robotic group required significantly less opioids as measured by MME on all postoperative days (p = 0.004), as well as lower average and highest daily pain scores for POD 0-5 (p = 0.02, and p = 0.006, respectively). In a linear mixed-effects model, robotic resections were associated with a decrease in average pain scores by 0.36 over time (p = 0.03) and 35 fewer MME requirements than the laparoscopic group (p = 0.0004). Patients in the robotic arm had earlier return to work (2.1 vs 3.8 days, p = 0.036). The robotic approach to colorectal resections is associated with significantly less postoperative pain, decreased opioid requirements, and earlier return to work when compared to laparoscopy, suggesting that the robotic platform provides important clinical advantages over the laparoscopic approach.

The optimal concentration of ropivacaine for transversus abdominis plane blocks in elective cesarean section: A protocol for systematic review and meta-analysis

INTRODUCTION

Transversus abdominis plane (TAP) blocks are commonly performed for postoperative analgesia in elective cesarean section. Ropivacaine is the most commonly used local anesthetic for TAP blocks. Currently, the concentration of ropivacaine for TAP blocks is various, and increasing number of randomized controlled trials (RCTs) have compared the effects of different concentration of ropivacaine for TAP blocks in cesarean section. This protocol of a systematic review and meta-analysis aims to identify the optimal concentration of ropivacaine for TAP blocks in elective cesarean section.

METHODS AND ANALYSIS

Databases including PubMed, Web of science, the Cochrane library, and EMBASE will be searched from their inception to May 1, 2024. RCTs that investigated the analgesia of different concentrations of ropivacaine for TAP blocks in elective cesarean section will be identified. The analgesia duration will be the primary outcome. Secondary outcomes will include the analgesics consumption over postoperative 24 hours, postoperative pain scores at rest and movement, and the incidence of adverse effects. RevMan 5.4 software will used for statistical analysis. The evidence quality of synthesized results will be evaluated by the Grading of Recommendations Assessment, Development, and Evaluation (GRADE) approach.

ETHICS AND DISSEMINATION

Ethical approval is not applicable. The results of this study will be published on completion.

TRIAL REGISTRATION

PROSPERO registration number: CRD42024496907.

Influence of Transverse Abdominis Plane Block on Intraoperative Diaphragmatic and Respiratory Functions in Patients Receiving Laparoscopic Colorectal Surgery

Background

The positive roles of deep muscle relaxation in abdominal surgeries and transversus abdominis plane block (TAPB) in the postoperative analgesia. This study aimed to discuss the effects of TAPB on abdominal muscle relaxation, the intraoperative diaphragmatic, and the respiratory functions.

Methods

The patients were randomly divided into the TAPB group who received single-shot TAPB bilaterally (n=30), and the control group who did not receive TAPB (n=30). Both groups keep the same steps for other procedures in the surgeries and anesthesia. Four time points for monitoring were defined: The moment when pneumoperitoneum pressure stabilized following endotracheal intubation and anesthetic induction (T0), appearance of the first incisure in the pressure-volume (P-V) loop (T1), appearance of the second incisure in the P-V loop (T2), and the moment with single stimulation (SS) =20% (T3). Primary observation parameters were SS1 measured by muscle relaxation monitoring at T1, and SS2 at T2. Secondary observation parameters included surgeon's satisfaction with surgical field and respiratory dynamics at the four time points.

Results

The two groups were comparable in age, gender, BMI, ASA grade, and operation time. The TAPB group had a dramatic reduction in the total dose of intraoperative sufentanil (0.73±0.21 ug/kg) compared with the control group (0.87±0.18 ug/kg) (P=0.023); Other use of drug did not differ between the two groups. The two groups did not differ significantly in SS at either T1 (SS1) or T2 (SS2). In either group, surgeon's satisfaction with surgical field at T1 and T2 decreased dramatically compared with T0 and T3 (all P<0.05). At each time point, the respiratory dynamics and the surgeon's satisfaction with surgical field did not differ significantly between the two groups.

Conclusion

TAPB reduced the use of intraoperative analgesics without altering the degree of abdominal relaxation, or affecting surgeon's satisfaction with surgical field in the patients receiving laparoscopic colorectal surgery.

Optimal approach for ultrasound-guided transversus abdominis plane (TAP) blocks for abdominal surgeries: a protocol for systematic review and meta-analysis

INTRODUCTION

Transversus abdominis plane (TAP) blocks are commonly used for postoperative analgesia after various abdominal surgeries. There are several different approaches for performing TAP blocks, mainly including posterior, lateral and subcostal approaches. An increasing number of randomised controlled trials (RCTs) have compared the analgesic effects of different TAP block approaches, but the results have not been consistent. This protocol aims to determine the optimal approach of ultrasound-guided TAP blocks for postoperative analgesia after abdominal surgery.

METHODS AND ANALYSIS

Four databases, including Web of Science, PubMed, EMBASE and the Cochrane Library will be systematically searched to identify RCTs that compared the analgesic effects of different ultrasound-guided TAP block approaches. The search interval will range from the inception of the databases to 30 July 2024. The postoperative opioid consumption over 24 hours will be defined as the primary outcome. The secondary outcomes will include the analgesia duration, postoperative pain scores at rest and during movement at different timepoints and the incidence of adverse effects. All the statistical analyses will be conducted using RevMan V.5.4. The quality of evidence will be evaluated by the Grading of Recommendations Assessment, Development and Evaluation approach.

ETHICS AND DISSEMINATION

Ethical approval will not be needed. The results will be submitted to one peer-reviewed journal when completed.

PROSPERO REGISTRATION NUMBER

CRD42024510141.

Laparoscopic assisted versus ultrasound guided transversus abdominis plane block in laparoscopic bariatric surgery: a randomized controlled trial

BACKGROUND

Transversus abdominis plane block (TAPB) guided by laparoscopy and ultrasound showed promise in enhancing the multimodal analgesic approach following several abdominal procedures. This study aimed to compare the efficacy and safety between Laparoscopic (LAP) TAP block (LTAP) and ultrasound-guided TAP block (UTAP) block in patients undergoing LAP bariatric surgery.

PATIENTS AND METHODS

This non-inferiority randomized controlled single-blind study was conducted on 120 patients with obesity scheduled for LAP bariatric surgeries. Patients were allocated into two equal groups: LTAP and UTAP, administered with 20 mL of 0.25% bupivacaine on each side.

RESULTS

There was no statistically significant difference in the total morphine consumption, Visual Analogue Scale (VAS) score at all times of measurements, and time to the first rescue analgesia (p > .05) between both groups. The duration of anesthesia and duration of block performance were significantly shorter in the LTAP group than in the UTAP group (p < .001). Both groups had comparable post-operative heart rate, mean arterial pressure, adverse effects, and patient satisfaction.

CONCLUSIONS

In LAP bariatric surgery, the analgesic effect of LTAP is non-inferior to UTAP, as evidenced by comparable time to first rescue analgesia and total morphine consumption with similar safety blocking through the low incidence of post-operative complications and patient satisfaction.

TRIAL REGISTRATION

The study was registered in Pan African Clinical Trials Registry (PACTR) (ID: PACTR202206871825386) on June 29, 2022.

Laparoscopic vs. ultrasound-guided transversus abdominis plane (TAP) block in colorectal surgery: a systematic review and meta-analysis of randomized trials

BACKGROUND

The transversus abdominis plane block (TAPB) is effective for postoperative pain management in patients undergoing colorectal surgery. However, evidence regarding the optimal delivery method, either laparoscopic (L-TAPB) or ultrasound-guided (U-TAPB) is lacking. Our study aimed to compare the effectiveness of these delivery methods.

METHODS

We carried out a literature search of PubMed, Cochrane Library, Web of Science, and Google Scholar databases to include randomized studies comparing patients receiving either L-TAPB or U-TAPB during minimally invasive colorectal surgery. The primary endpoint was opioid consumption in the first 24 h after surgery. Risk of bias was assessed with the RoB-2 tool. Effect size was estimated for each study with 95% confidence interval and overall effect measure was estimated with a random effect model.

RESULTS

The literature search revealed 294 articles, of which four randomized trials were eligible. A total of 359 patients were included, 176 received a L-TAPB and 183 received a U-TAPB. We established the non-inferiority of L-TAPB, as the absolute difference of - 2.6 morphine-mg (95%CI - 8.3 to 3.0) was below the pooled non-inferiority threshold of 8.1 morphine-mg (low certainty level). No difference in opioid consumption was noted at 2, 6, 12, and 48 h (low to very low certainty level). Postoperative pain, nausea and vomiting were similar between groups at different timepoints (low to very low certainty level). No TAPB-related complications were recorded. Finally, the length of hospital stay was similar between groups.

CONCLUSION

For postoperative multimodal analgesia both L-TAPB and U-TAPB may result in little to no difference in outcome in patients undergoing colorectal surgery. Registration Prospero CRD42023421141.

PROcedure-SPECific postoperative pain management guideline for laparoscopic colorectal surgery: A systematic review with recommendations for postoperative pain management

Colorectal cancer is the second most common cancer diagnosed in women and third most common in men. Laparoscopic resection has become the standard surgical technique worldwide given its notable benefits, mainly the shorter length of stay and less postoperative pain. The aim of this systematic review was to evaluate the current literature on postoperative pain management following laparoscopic colorectal surgery and update previous procedure-specific pain management recommendations. The primary outcomes were postoperative pain scores and opioid requirements. We also considered study quality, clinical relevance of trial design, and a comprehensive risk-benefit assessment of the analgesic intervention. We performed a literature search to identify randomised controlled studies (RCTs) published before January 2022. Seventy-two studies were included in the present analysis. Through the established PROSPECT process, we recommend basic analgesia (paracetamol for rectal surgery, and paracetamol with either a nonsteroidal anti-inflammatory drug or cyclo-oxygenase-2-specific inhibitor for colonic surgery) and wound infiltration as first-line interventions. No consensus could be achieved either for the use of intrathecal morphine or intravenous lidocaine; no recommendation can be made for these interventions. However, intravenous lidocaine may be considered when basic analgesia cannot be provided.

Laparoscopic transverse abdominis plane block: how I do it and a cost efficiency analysis

PURPOSE

To determine the efficacy and efficiency of laparoscopic transverse abdominis plane block (Lap-TAP) in patients undergoing pancreatoduodenectomy and gastrectomy compared to those of ultrasound-guided TAP (US-TAP).

METHODS

We retrospectively analyzed the records of patients who underwent open or minimally invasive (MIS) pancreatoduodenectomy and major gastrectomy with the use of Lap-TAP or US-TAP at our institution between November 1, 2018, and September 30, 2021. We compared the estimated time and cost associated with Lap-TAP and US-TAP. We also compared postoperative opioid use and pain scores between patients who underwent open laparotomy with these TAPs.

RESULTS

A total of 194 patients were included. Overall, 114 patients (59%) underwent pancreatectomy, and 80 patients (41%) underwent gastrectomy. Additionally, 138 patients (71%) underwent an open procedure, and 56 patients (29%) underwent MIS. A total of 102 patients (53%) underwent US-TAP, and 92 (47%) underwent Lap-TAP. The median time to skin incision was significantly shorter in the Lap-TAP group (US-TAP, 59 min vs. Lap-TAP, 45 min; P < 0.001), resulting in an estimated reduction in operation cost by $602. Pain scores and postoperative opioid use were similar between Lap-TAP and US-TAP among open surgery patients, indicating equivalent pain control between Lap-TAP and US-TAP.

CONCLUSION

Lap-TAP was equally effective in pain control as US-TAP after pancreatectomy and gastrectomy, and Lap-TAP can reduce operation time and cost. Lap-TAP is considered the preferred approach for MIS pancreatectomy and gastrectomy, which occasionally needs conversion to laparotomy.

Laparoscopic versus Ultrasound-Guided Transversus Abdominis Plane Block for Postoperative Analgesia Management after Radical Prostatectomy: Results from a Single Center Study

(1) Background: Regional anesthesia, achieved through nerve blocks, has gained widespread acceptance as an effective pain management approach. This research aimed to evaluate the efficacy of laparoscopic (LAP) transversus abdominis plane (TAP) block in patients undergoing laparoscopic radical prostatectomy. (2) Methods: From January 2023 to July 2023, 60 consecutive patients undergoing minimally invasive radical prostatectomy were selected. Patients were split into two groups receiving ultrasound-guided (US) or laparoscopic-guided TAP block. The primary outcome was a pain score expressed by a 0-10 visual analog scale (VAS) during the first 72 h after surgery. (3) Results: Both LAP-TAP and US-TAP block groups were associated with lower pain scores postoperatively. No statistically significant differences were observed between the two groups in surgery time, blood loss, time to ambulation, length of stay, and pain after surgery (all p > 0.2). In the LAP-TAP block group, the overall operating room time was significantly shorter than in the US-TAP block group (140 vs. 152 min, p = 0.04). (4) Conclusions: The laparoscopic approach, compared to the US-TAP block, was equally safe and not inferior in reducing analgesic drug use postoperatively. Moreover, the intraoperative LAP-TAP block seems to be a time-sparing procedure that could be recommended when patient-controlled analgesia cannot be delivered.

Laparoscopic versus ultrasound-guided transversus abdominis plane block in colorectal surgery: a non-inferiority, multicentric randomized double-blinded clinical trial

AIM

The aim of this study was to assess if laparoscopic-assisted transversus abdominis plane (TAP) block (L-TAPB) is as efficient as ultrasound-guided TAP block (U-TAPB) in postoperative pain control.

METHOD

In all, 112 patients scheduled for elective laparoscopic colon resection from February 2018 to December 2021 at two Swiss hospitals were included and randomized in a 1:1 ratio before surgery with either L-TAPB or U-TAPB. The primary end-point was the non-inferiority of the L-TAPB compared to U-TAPB with regard to the total opioid consumption within the first 24 h after surgery. Data regarding patients' characteristics, opioid consumption, pain on the visual analogue scale, operative and anaesthesia induction time, complications and length of stay were collected and analysed.

RESULTS

Fifty-five patients were allocated to the L-TAPB and fifty-seven to the U-TAPB. No significant difference was found in the overall dose of opioids within 24 h, and the non-inferiority of the L-TAPB was confirmed. There were almost twice as many patients in the L-TAPB group requesting opioid reserves compared to the U-TAPB group (54.5% vs. 29.8%, P = 0.008). The anaesthesia induction time was significantly longer in the U-TAPB group (17 ± 11 min vs. 23 ± 12 min, P = 0.014). For all other variables (pain on the visual analogue scale, opioid consumption, need of epidural analgesia, operating time, postoperative complications and hospital stay) no statistically significant difference between the L-TAPB and the U-TAPB groups was noted.

CONCLUSION

Our results showed the non-inferiority of the laparoscopic delivery compared to ultrasound-guided administration of the TAP block, with the advantage of not affecting anaesthesia times.

STUDY REGISTRATION NUMBER

2017-02017 CE 3294, ClinicalTrials.gov identifier NCT04575233.

Surgeon administered transversus abdominis plane block: anatomic principles and technique

The Transversus Abdominis Plane (TAP) block is a regional abdominal wall block that has been effectively used as an adjunct to alleviate postoperative pain. The ultrasound-guided TAP (USTAP) administered by anesthesiologists is the gold standard and has been effective for surgeries involving abdominal wall incisions. Recently, the TAP block has been administered by surgeons with the help of direct visualization during minimally invasive surgery. The surgeon-administered or laparoscopic-guided TAP block has been compared to the USTAP with no discernible difference in patient outcomes. Also, directly visualizing the injection in the surgeon-administered block can offset complications such as visceral injury and block failure (injectate in the wrong plane). This review explores the literature's surgeon-administered TAP blocks for minimally invasive surgery in the literature. In addition, the prerequisite anatomy of the anterolateral abdominal wall, various approaches, and other factors that influence the efficacy of the block are described to increase awareness of this analgesic tool among surgeons and achieve better postoperative pain management.

Laparoscopic versus ultrasound-guided transversus abdominis plane block for postoperative pain management in minimally invasive colorectal surgery: a meta-analysis protocol

INTRODUCTION

Transversus abdominis plane block (TAPB) is now commonly administered for postoperative pain control and reduced opioid consumption in patients undergoing major colorectal surgeries, such as colorectal cancer, diverticular disease, and inflammatory bowel disease resection. However, there remain several controversies about the effectiveness and safety of laparoscopic TAPB compared to ultrasound-guided TAPB. Therefore, the aim of this study is to integrate both direct and indirect comparisons to identify a more effective and safer TAPB approach.

MATERIALS AND METHODS

Systematic electronic literature surveillance will be performed in the PubMed, Embase, Cochrane Central Register of Controlled Trials (CENTRAL), and ClinicalTrials.gov databases for eligible studies through July 31, 2023. The Cochrane Risk of Bias version 2 (RoB 2) and Risk of Bias in Non-randomized Studies of Interventions (ROBINS-I) tools will be applied to scrutinize the methodological quality of the selected studies. The primary outcomes will include (1) opioid consumption at 24 hours postoperatively and (2) pain scores at 24 hours postoperatively both at rest and at coughing and movement according to the numerical rating scale (NRS). Additionally, the probability of TAPB-related adverse events, overall postoperative 30-day complications, postoperative 30-day ileus, postoperative 30-day surgical site infection, postoperative 7-day nausea and vomiting, and length of stay will be analyzed as secondary outcome measures. The findings will be assessed for robustness through subgroup analyses and sensitivity analyses. Data analyses will be performed using RevMan 5.4.1 and Stata 17.0. P value of less than 0.05 will be defined as statistically significant. The certainty of evidence will be examined via the Grading of Recommendations, Assessment, Development, and Evaluation (GRADE) working group approach.

ETHICS AND DISSEMINATION

Owing to the nature of the secondary analysis of existing data, no ethical approval will be required. Our meta-analysis will summarize all the available evidence for the effectiveness and safety of TAPB approaches for minimally invasive colorectal surgery. High-quality peer-reviewed publications and presentations at international conferences will facilitate disseminating the results of this study, which are expected to inform future clinical trials and help anesthesiologists and surgeons determine the optimal tailored clinical practice for perioperative pain management.

SYSTEMATIC REVIEW REGISTRATION

https://www.crd.york.ac.uk/PROSPERO/display_record.php?RecordID=281720, identifier (CRD42021281720).

Feasibility of opioid-free surgery for inflammatory bowel disease

AIM

Patients undergoing colorectal surgery or those with inflammatory bowel disease (IBD) are particularly at risk for opioid-related complications and progression to long-term opioid dependence. The aim of this work is to explore the real-world possibility of perioperative opioid avoidance in colorectal surgery and IBD.

METHOD

We conducted a retrospective analysis of patients aggregated from two prospective studies on multimodal postoperative pain control conducted at a single tertiary referral centre. All patients underwent major colorectal surgery with bowel resection. Patients with chronic preoperative opioid use were excluded. Opioid use was measured in oral morphine equivalents (OME) each postoperative day (POD) and cumulatively for the first 72 h.

RESULTS

Our cohort of 209 patients included 148 (71%) with IBD and 61 (29%) non-IBD patients. IBD patients required significantly more opioids cumulatively over the first 72 postoperative hours compared with non-IBD patients [median OME 77 mg (interquartile range 33-148 mg) vs. 4 mg (interquartile range 17-82 mg), respectively; p = 0.001]. Five percent of IBD patients achieved opioid-free postoperative pain control during the entire 72 h postoperative period compared with 12% of non-IBD patients. Only 7% of IBD patients avoided opioid use on POD 1 compared with 20% of non-IBD patients (p = 0.02); however the number of IBD patients increased to 16% on POD 2 then 40% on POD 3, closely resembling the non-IBD cohort at 49% (p = 0.22).

CONCLUSION

In the era of modern enhanced recovery protocols and minimally invasive techniques, we show that early postoperative opioid avoidance is feasible in a limited number of IBD patients after colorectal surgery.

Postoperative Analgesia in Enhanced Recovery After Surgery Protocols: Trends and Updates

Multimodal analgesia is an effective strategy to decrease opioid use after surgery and has been a mainstay of the surgical contribution to combat the opioid epidemic. Postoperative multimodal analgesia in Enhanced Recovery After Surgery (ERAS) continues to evolve as different adjuncts are added and removed based on the most up to date literature. This review examines recent trends in ERAS analgesia and what current evidence and research supports as well as those adjuncts that may not be as beneficial as once thought.

Evaluation of the Two-Point Ultrasound-Guided Transversus Abdominis Plane Block for Laparoscopic Canine Ovariectomy

The transversus abdominis plane (TAP) block causes desensitization of the abdominal wall and peritoneum. Of all the approaches proposed to perform it, the two-injection-point TAP showed the best results in terms of the area reached by the anesthetic solution. However, to date, no clinical data exist. The aim of this study was to evaluate the intra- and postoperative analgesic efficacy of a two-injection-point TAP block in dogs undergoing laparoscopic ovariectomy. A total of 26 animals were assigned to receive general inhalation anesthesia (control group), and 26 dogs were assigned to general inhalation anesthesia combined with TAP block (TAP group). The ultrasound-guided TAP block was carried out with a subcostal and cranial-to-ilium injection per hemiabdomen. The end-tidal concentration of isoflurane (EtISO) was recorded at different moments during the surgery. Postoperative pain was assessed at different time points during the first 24 h after surgery. The control group required significantly higher EtISO concentration during the ovarian resection and showed higher postoperative pain scores than the TAP group. Fewer dogs in the TAP group required intra- or postoperative rescue analgesia. TAP block can be implemented to improve postoperative pain management after laparoscopy, reducing the dosage of the systemic drugs used and, hence, their possible side effects.

Transversus abdominis plane block for laparoscopic colorectal surgery: A meta-analysis of randomised controlled trials

BACKGROUND

The effectiveness of transversus abdominis plane block (TAP) on pain management after laparoscopic colorectal surgery (CRS) remains unclear since the only relevant meta-analysis on this topic did not separate laparoscopic CRS from open CRS. The aim of the study was to compare the analgesic efficacy and safety of TAP with non-TAP in patients undergoing laparoscopic CRS.

METHODS

Four databases were searched for randomized controlled trials (RCTs) on this topic using relevant keywords. Two authors independently completed evidence selection, data extraction, and critical appraisal. Available data were pooled in the random-effects model, and point estimates with 95% confidence interval (CI) were reported for postoperative pain at rest and on coughing, opioid consumption, length of hospital stay, and adverse events.

RESULTS

A total of 14 RCTs (n = 1216) contributed to the present synthesis. Pooled result showed that patients in the TAP group had lower pain at rest than those in the non-TAP group at postoperative 2-h (mean difference [MD] = -1.42; P < 0.05), 4-h (MD = -0.97; P < 0.05), 12-h (MD = -0.75; P < 0.05), and 24-h (MD = -0.61; P < 0.05). Patients in the TAP group also had lower postoperative pain on coughing than those in the non-TAP group on the first day (MD = -1.02; P < 0.05). Moreover, TAP had lesser postoperative opioid consumption than non-TAP (standardized mean difference, -0.26; P < 0.05; I-square = 20%), and there were non-significant differences in hospital stay and adverse event between the two groups.

CONCLUSION

Intraoperative TAP is a safe and feasible pain management for laparoscopic CRS, particularly it is recommended when patient-controlled analgesia is not delivered. Therefore, laparoscopic TAP block might be a favorable administered strategy.

Preoperative transversus abdominis plane block decreases intraoperative opiate use during pancreatoduodenectomy

BACKGROUND

Multimodal analgesia and regional anesthetic blocks, such as transversus abdominis plane (TAP) block, decrease postoperative opiate consumption but their effect on intraoperative opiates is unknown.

METHODS

This was a retrospective review of patients undergoing pancreatoduodenectomy between June 2018 and February 2021, in which perioperative data, operative times, and medication administration data were collected. Intraoperative opiate use was calculated in total morphine equivalent doses (MED) for each patient and adjusted for operative time. Univariate analysis and multivariate linear regression were performed to determine factors affecting intraoperative opiate requirements.

RESULTS

Of the 169 patients in the study, 51 (30.2%) received pre-surgical TAP blocks and 118 (69.8%) did not. There were no statistically significant differences in intraoperative opiate use with preoperative acetaminophen (p = 0.527), celecoxib (p = 0.553), gabapentin (p = 0.308), intraoperative ketorolac (p = 0.698) or epidural placement (p = 0.086). Minimally invasive surgery had lower intraoperative opiate use compared to open (p = 0.011), as well as pre-surgical TAP block compared to no pre-surgical block (5.24 vs 7.27 MED/hour, p < 0.001). On multivariate linear regression, pre-surgical TAP block (p = 0.001) was independently associated with decreased intraoperative opiate use.

CONCLUSION

Preoperative TAP blocks were associated with decreased intraoperative opiate use during pancreatoduodenectomy and should be considered for routine use.

A meta-analysis of laparoscopic versus ultrasound-guided transversus abdominis plane block in laparoscopic colorectal surgery

BACKGROUND

Enhanced recovery programmes in laparoscopic colorectal surgery (LCS) employ combined approaches to achieve postoperative analgesia. Transversus abdominis plane (TAP) block is a locoregional anaesthetic technique that may reduce postoperative pain.

AIMS

To perform a systematic review and meta-analysis to compare the effectiveness of laparoscopic- versus ultrasound-guided TAP block in LCS.

METHODS

Databases were searched for relevant articles from inception until March 2022. All randomised controlled trials (RCTs) that compared laparoscopic (LTB) versus ultrasound-guided (UTB) TAP blocks in LCS were included. The primary outcome was narcotic consumption at 24 h postoperatively, whilst secondary outcomes included pain scores at 24 h postoperatively, operative time, postoperative nausea and vomiting (PONV) and complication rates. Random effects models were used to calculate pooled effect size estimates.

RESULTS

Three RCTs were included capturing 219 patients. Studies were clinically heterogenous. On random effects analysis, LTB was associated with significantly lower narcotic consumption (SMD - 0.30 mg, 95% CI = - 0.57 to - 0.03, p = 0.03) and pain scores (SMD - 0.29, 95% CI = - 0.56 to - 0.03, p = 0.03) at 24 h. However, there were no differences in operative time (SMD - 0.09 min, 95% CI = - 0.40 to 0.22, p = 0.56), PONV (OR = 0.97, 95% CI = 0.36 to 2.65, p = 0.96) or complication (OR = 1.30, 95% CI = 0.64 to 2.64, p = 0.47) rates.

CONCLUSIONS

LTB is associated with significantly less narcotic usage and pain at 24 h postoperatively but similar PONV, operative time and complication rates, compared to UTB. However, the data were inconsistent, and our findings require further investigation. LTB obviates the need for ultrasound devices whilst also decreasing procedure logistical complexity.

Ultrasound-guided versus laparoscopic-guided subcostal transversus abdominis plane (TAP) block versus No TAP block in laparoscopic cholecystectomy; a randomized double-blind controlled trial

BACKGROUND

Transversus abdominis plane (TAP) block is an effective modality for the control of immediate postoperative pain. The present randomized trial aimed to assess the efficacy of ultrasound-guided subcostal TAP (USTAP) and laparoscopic subcostal TAP (LSTAP) block as compared to standard care without TAP block after laparoscopic cholecystectomy.

METHODS

This was a prospective, randomized, controlled trial on patients who underwent laparoscopic cholecystectomy. Patients were equally randomized to one of three groups: USTAP, LSTAP, and control group (no TAP block). The main outcome measures were pain scores and analgesic consumption within the first 24 h postoperatively, postoperative nausea and vomiting (PONV), time to ambulation, time to first flatus, and adverse effects of TAP block.

RESULTS

The trial included 110 patients (90% females) with a mean age of 40.9 ± 11.7 years. Both USTAP and LSTAP block groups were associated with significantly lower pain scores at 2, 6, 12, and 24 h postoperatively, lower cumulative dose of paracetamol, less PONV, and shorter time to flatus than the control group. USTAP and LSTAP block were associated with similar pain scores at all time points, similar analgesic requirements, a similar incidence of PONV, and comparable time to first ambulation and time to first flatus. No adverse effects related to TAP block were recorded.

CONCLUSIONS

TAP block is a safe and effective method for pain control and improving recovery after laparoscopic cholecystectomy. Both USTAP and LSTAP blocks were equally effective in terms of pain relief, analgesic requirements, PONV, return of bowel function, and time to ambulation.

A Prospective Randomized Trial of Surgeon-Administered Intraoperative Transversus Abdominis Plane Block With Bupivacaine Against Liposomal Bupivacaine: The TINGLE Trial

BACKGROUND

Transversus abdominis plane blocks are increasingly used to achieve opioid-sparing analgesia after colorectal surgery. Traditionally, bupivacaine was the long-acting analgesic of choice, but the addition of dexamethasone and/or epinephrine to bupivacaine may extend block duration. Liposomal bupivacaine has also been suggested to achieve an extended analgesia duration of 72 hours but is significantly more expensive.

OBJECTIVE

The purpose of this study was to compare pain control between laparoscopic transversus abdominis plane blocks using liposomal bupivacaine versus bupivacaine with epinephrine and dexamethasone.

DESIGN

This was a parallel-group, single-institution, randomized clinical trial.

SETTINGS

The study was conducted at a single tertiary medical center.

PATIENTS

Consecutive patients between October 2018 to October 2019, ages 18 to 90 years, undergoing minimally invasive colorectal surgery with multimodal analgesia were included.

INTERVENTIONS

Patients were randomly assigned 1:1 to receive a laparoscopic transversus abdominis plane block with liposomal bupivacaine or bupivacaine with epinephrine and dexamethasone.

MAIN OUTCOME MEASURES

The primary outcome was total oral morphine equivalents administered in the first 48 hours postoperatively. Secondary outcomes included pain scores, time to ambulation and solid diet, hospital length of stay, and complications.

RESULTS

A total of 102 patients (50 men) with a median age of 42 years (interquartile range, 29-60 y) consented and were randomly assigned. The primary end point, total oral morphine equivalents administered in the first 48 hours, was not significantly different between the liposomal bupivacaine group (median = 69 mg) and the bupivacaine with epinephrine and dexamethasone group (median = 47 mg; difference in medians = 22 mg, (95% CI, -17 to 49 mg); p = 0.60). There were no significant differences in pain scores, time to ambulation, time to diet tolerance, time to bowel movement, length of stay, overall complications, or readmission rate between groups. There were no treatment-related adverse outcomes.

LIMITATIONS

This study was not placebo controlled or blinded.

CONCLUSIONS

This first randomized trial comparing laparoscopic transversus abdominis plane block with liposomal bupivacaine or bupivacaine with epinephrine and dexamethasone showed that a liposomal bupivacaine block does not provide superior or extended analgesia in the era of standardized multimodal analgesia protocols.See Video Abstract at http://links.lww.com/DCR/B533.

ESTUDIO PROSPECTIVO Y RANDOMIZADO DE BLOQUEO DEL PLANO MUSCULAR TRANSVERSO DEL ABDOMEN REALIZADO POR EL CIRUJANO CON BUPIVACANA VERSUS BUPIVACANA LIPOSOMAL ESTUDIO TINGLE

ANTECEDENTES:El bloqueo anestésico del plano muscular transverso del abdomen se utiliza cada vez más para lograr una analgesia con menos consumo de opioides después de cirugía colorrectal. Tradicionalmente, la Bupivacaína era el analgésico de acción prolongada de elección, pero al agregarse Dexametasona y/o Adrenalina a la Bupivacaína se puede prolongar la duración del bloqueo. También se ha propuesto que la Bupivacaína liposomal logra una duración prolongada de la analgesia de 72 horas, pero es significativamente más cara.OBJETIVO:Comparar el control del dolor entre bloqueo laparoscópico del plano de los transversos del abdomen usando Bupivacaína liposomal versus Bupivacaína con Adrenalina y Dexametasona.DISEÑO:Estudio clínico prospectivo y randomizado de una sola institución en grupos paralelos.AJUSTE:Centro médico terciario único.PACIENTES:Todos aquellos pacientes entre 18 y 90 años sometidos a cirugía colorrectal mínimamente invasiva con analgesia multimodal, entre octubre de 2018 a octubre de 2019 incluidos de manera consecutiva.INTERVENCIONES:Los pacientes fueron seleccionados aleatoriamente 1:1 para recibir un bloqueo laparoscópico del plano de los transversos del abdomen con Bupivacaína liposomal o Bupivacaína con Adrenalina y Dexametasona.PRINCIPALES MEDIDAS DE RESULTADO:El resultado primario fue el total de equivalentes de morfina oral administradas en las primeras 48 horas después de la operación. Los resultados secundarios incluyeron puntuaciones de dolor, inicio de dieta sólida, tiempo de inicio a la deambulación, la estadía hospitalaria y las complicaciones.RESULTADOS:Un total de 102 pacientes (50 hombres) con una mediana de edad de 42 años (IQR 29-60) fueron incluidos aleatoriamente. El criterio de valoración principal, equivalentes de morfina oral total administrada en las primeras 48 horas, no fue significativamente diferente entre el grupo de Bupivacaína liposomal (mediana = 69 mg) y el grupo de Bupivacaína con Adrenalina y Dexametasona (mediana = 47 mg; diferencia en medianas = 22 mg, IC del 95% [-17] - 49 mg, p = 0,60). No hubo diferencias significativas en las puntuaciones de dolor, tiempo de inicio a la deambulación, el tiempo de tolerancia a la dieta sólida, el tiempo hasta el primer evacuado intestinal, la duración de la estadía hospitalaria, las complicaciones generales o la tasa de readmisión entre los grupos. No hubo resultados adversos relacionados con el tratamiento.LIMITACIONES:Este estudio no fue controlado con placebo ni de manera cegada.CONCLUSIONES:Este primer estudio prospectivo y randomizado que comparó el bloqueo del plano de los músculos transversos del abdomen por vía laparoscópica, utilizando Bupivacaína liposomal o Bupivacaína con Adrenalina y Dexametasona, demostró que el bloqueo de Bupivacaína liposomal no proporciona ni mejor analgesia ni un efecto mas prolongado.Consulte Video Resumen en http://links.lww.com/DCR/B533.

Laparoscopic versus ultrasound-guided visualization of transversus abdominis plane blocks

BACKGROUND

Ultrasound-guided (US) transversus abdominis plane (TAP) block is commonly utilized as part of a multi-modal approach for postoperative pain management. This study seeks to determine whether laparoscopic-guided TAP blocks are as effective as US-guided TAP blocks among pediatric patients.

METHOD

In this prospective, randomized controlled trial, pediatric patients undergoing laparoscopic procedures were randomly assigned to one of two treatment arms: US-guided TAP block (US-arm) or laparoscopic-guided TAP block (LAP-arm). Primary outcome was PACU pain scores. Secondary outcomes included PACU opioid consumption, block completion time and block accuracy.

RESULTS

Twenty-five patients were enrolled in each arm. In the LAP-arm, 59% of blocks were in the transversus abdominis plane compared to 74% of TAP blocks in the US-arm (p = 0.18). Blocks were completed faster in the LAP-arm (2.1 ± 1.9 vs. 7.9 ± 3.4 min, p<0.001). The average highest PACU pain score was 3.4 ± 3.1 for the LAP-arm and 4.3 ± 3.8 for the US-arm (p = 0.37). Overall PACU pain scores and opioid consumption were similar between the groups (1.2 ± 1.3 vs. 1.6 ± 1.6, p = 0.24; 2.2 ± 5.8 vs. 0.9 ± 1.4MME, p = 0.26).

CONCLUSION

Laparoscopic TAP blocks have equivalent efficacy in post-operative pain scores, narcotic use, and tissue plane accuracy as compared to US-guided TAP blocks. They are also completed faster and may result in less operating room and general anesthetic time for the pediatric patient.

[Initial experiences with the implementation of the enhanced recovery after surgery (ERAS®) protocol]

BACKGROUND

To further improve treatment quality and patient orientation, a multiprofessional enhanced recovery after surgery (ERAS®) transformation program was initiated in our clinic in January 2020. The ERAS® treatment pathway for colorectal surgery was established in October 2020.

OBJECTIVE

The aim of the study was to show that the perioperative treatment quality can be increased by implementing a certified ERAS® program in the setting of a fast-track pathway that has been established since 2008.

MATERIAL AND METHODS

The first ERAS® patients from October/November 2020 (ERAS®) were compared with those of a representative consecutive control cohort (pre-ERAS®) who had undergone interventions from August to December 2019. Patient care and data collection of the ERAS® patients were ensured by an ERAS® nurse in daily visits. For the comparison cohorts, the electronic patient files were analyzed and historical colon pathway data from our clinic from 2008 were used.

RESULTS AND CONCLUSION

A total of 10 ERAS® and 50 pre-ERAS® patients were included. After the ERAS® transformation, an increase in overall compliance with ERAS® guideline recommendations from 45% (pre-ERAS®) to 75% (ERAS®) was achieved. The number of days to tolerance of solid food decreased from 2 days (pre-ERAS®) to 1 day (ERAS®). The general postoperative complication rate was comparable (22% pre-ERAS® vs. 20% ERAS®). Most noticeable was the reduction of the median hospital stay of 9 days in the historical cohort to 3 days after ERAS® implementation. We attribute the necessary high ERAS® pathway compliance of 75% to a successful combination of process standards and multiprofessional ERAS® teams.

A Standardized Multimodal Analgesia Protocol Reduces Perioperative Opioid Use in Minimally Invasive Colorectal Surgery

BACKGROUND

Multimodal analgesia protocols are becoming a common part of enhanced recovery pathways after colorectal surgery. However, few protocols include a robust intraoperative component in addition to pre-operative and post-operative analgesics.

METHOD

A prospective cohort study was performed in an urban teaching hospital in patients undergoing minimally invasive colorectal surgery before and after implementation of a multimodal analgesia protocol consisting of pre-operative (gabapentin, acetaminophen, celecoxib), intraoperative (lidocaine and magnesium infusions, ketorolac, transversus abdominis plane block), and post-operative (gabapentin, acetaminophen, celecoxib) opioid-sparing elements. The main outcome measure was use of morphine equivalents in the first 24-h post-operative period.

RESULTS

The study cohort (n = 71) included 41 patients before and 30 patients after implementation of a multimodal analgesia protocol. Mean age of the entire study cohort was 47 ± 19.7 years and 46% were male. Patients undergoing surgery post-multimodal analgesia vs. pre-multimodal analgesia had significantly lower use of IV morphine equivalents in first 24-h post-operative period (5.8 ± 6.4 mg vs. 22.8 ± 21.3 mg; p = 0.005) and first 48-h post-operative period (7.6 ± 9.4 mg vs. 42 ± 52.9 mg; p = 0.0008). This reduction in IV morphine equivalent use post-multimodal analgesia was coupled with improved pain scores in the post-operative period. Post-operative hospital length of stay, post-operative ileus, and overall complications were not significantly different between groups.

CONCLUSIONS

Multimodal analgesia incorporating pre-operative, intraoperative, and post-operative opioid-sparing agents is an effective method for reducing perioperative opioid utilization and pain after minimally invasive colorectal surgery.

Transversus abdominis plane block using a short-acting local anesthetic reduces pain and opioid consumption after laparoscopic bariatric surgery: a meta-analysis

BACKGROUND

Transversus abdominis plane (TAP) block is a form of regional anesthesia that has been increasingly employed in minimally invasive surgery. The data regarding its use in laparoscopic bariatric surgery, however, are still limited and at times controversial.

OBJECTIVES

The aim of this meta-analysis was to assess the efficacy of TAP block after laparoscopic bariatric surgery.

SETTING

Soba University Hospital, Sudan.

MATERIALS

A systematic search was conducted through the Embase, Cochrane Collaboration, and PubMed databases for randomized controlled trials evaluating the effects of TAP block in patients undergoing laparoscopic bariatric surgery. Meta-analysis was performed using a random effects model. Primary endpoints were late (24 hr) pain scores at rest and on movement. Secondary endpoints included early (0-3 hr) pain scores at rest and on movement, opioid consumption, time to ambulation, length of hospital stay, and adverse events.

RESULTS

Ten randomized controlled trials met our inclusion criteria, with 404 patients in the TAP block groups and 413 patients in the control groups. TAP block was associated with significantly improved late pain scores (at rest, standardized mean difference [SMD] -.95, P < .001; on movement, SMD -1.04, P = .01) and early pain scores (at rest, SMD -1.81, P < .001; on movement, SMD -1.80, P < .001), reduced postoperative opioid consumption at 24 hours (SMD -2.23 mg intravenous morphine, P < .001), a shorter time to ambulation (SMD -1.07 hours, P < .001), and reduced incidence of postoperative nausea and vomiting (OR .20, P = .01). No significant difference was noted regarding length of hospital stay (P = .70). Postoperative TAP block administration resulted in greater effects on opioid consumption at 24 hours compared with preoperative block administration. Finally, none of the studies reported any adverse effect of local anesthetic.

CONCLUSION

Given the significant effect on early and late postoperative pain, opioid consumption, and postoperative recovery and the low risk profile, TAP block using a short-acting anesthetic should be encouraged in routine practice in patients undergoing laparoscopic bariatric surgery.

Laparoscopic-Guided Transversus Abdominis Plane Block for Postoperative Pain Management in Minimally Invasive Surgery: Systematic Review and Meta-Analysis

BACKGROUND

Optimal postoperative pain therapy for patients undergoing minimally invasive surgery remains controversial. The aim of this meta-analysis was to compare the efficacy and safety of the novel laparoscopic-guided transversus abdominis plane block (L-TAP) with other analgesic alternatives in adults undergoing minimally invasive surgery.

STUDY DESIGN

A systematic literature search of several databases was conducted according to the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) guidelines through March 9, 2020, to identify randomized controlled trials (RCTs) reporting on L-TAP. Primary outcomes were pain scores at rest and movement at 24 hours postoperatively. Secondary outcomes included postoperative pain scores at 0 to 4 and 48 hours, opioid consumption, hospital stay, functional recovery, patient satisfaction, and adverse events.

RESULTS

Nineteen RCTs with 1,983 patients were included. All trials compared L-TAP with ultrasound-guided transversus abdominis plane block (US-TAP), local infiltration analgesia (LIA), or inactive control; none controlled for epidural analgesia. Methodologic quality of these RCTs ranged from moderate to high. L-TAP provided comparable pain control compared with US-TAP, and better early pain control compared with LIA. Recovery parameters, 24-hour opioid consumption, and postoperative nausea and vomiting (PONV) were comparable between L-TAP and US-TAP. Meanwhile, 24-hour opioid consumption, PONV incidence, hospital stay, and patient satisfaction favored L-TAP compared with LIA. None of the studies reported adverse events related to the L-TAP procedure.

CONCLUSIONS

L-TAP is safe, and superior to LIA with respect to early pain control, opioid consumption, and patient satisfaction in adults undergoing minimally invasive surgery. Given its equivalence to US-TAP, L-TAP can be used as a safer and pragmatic alternative to epidural analgesia in this patient population.

Transversus Abdominis Plane Block in Laparoscopic Bariatric Surgery-a Systematic Review and Meta-Analysis of Randomized Controlled Trials

PURPOSE

Effective postoperative analgesia is paramount in patients undergoing bariatric surgery, given their increased predisposition to narcotic-induced respiratory depression. Transversus abdominis plane (TAP) block has shown promise in the enhanced recovery pathway for several abdominal procedures. We performed a systematic review and meta-analysis to compare the effectiveness of TAP block in laparoscopic bariatric surgery.

MATERIALS AND METHODS

PubMed, EMBASE and Cochrane databases were searched for relevant articles from inception until June 2020. All randomized trials that compared TAP blocks versus none in laparoscopic bariatric procedures were included. The primary outcome was narcotic consumption at 24 h postoperatively, whilst secondary outcomes included postoperative pain scores at 24 h, time to ambulation, postoperative nausea and vomiting (PONV) and complication rates. Random effects models were used to calculate pooled effect size estimates.

RESULTS

Seven randomized controlled trials were included, capturing 617 patients. There was high statistical heterogeneity across studies. On random effects analysis, there were no significant differences in narcotic consumption (MD -12.63 mg, 95% CI = -31.67 to 6.41, p = 0.19), pain scores (MD -0.71, 95% CI = -1.93 to 0.50, p = 0.25) or complications (RD = -0.00, 95% CI = -0.03 to 0.03, p = 0.87) between TAP and no TAP groups. However, TAP was associated with significantly less time to ambulation (MD -2.22 h, 95% CI = -3.89 to -0.56, p = 0.009) and PONV (OR = 0.13, 95% CI = 0.05 to 0.35, p < 0.0001).

CONCLUSIONS

TAP in laparoscopic bariatric surgery is associated with significantly less PONV and time to ambulation, but similar complication rates, narcotic usage and postoperative pain at 24 h compared to no TAP.

Efficacy of transversus abdominis plane (TAP) block in colorectal surgery: a systematic review and meta-analysis

BACKGROUND

Multimodal opioid-sparing analgesia is a key component of the enhanced recovery after surgery (ERAS) protocol for postoperative pain management. Transversus abdominis plane (TAP) block has contributed to the implementation of this approach in different kinds of surgical procedures. The aim of this study was to evaluate the efficacy of TAP block and its impact on recovery in colorectal surgery.

METHODS

A comprehensive literature search of the PubMed, Embase, and Scopus databases was conducted. Studies that compared TAP block to a control group (no TAP block or placebo) after colorectal resections were included. The effects of TAP block in patients undergoing colorectal surgery were assessed, including the technical aspects of the procedure. Two measures were used to evaluate the effectiveness of postoperative pain control: a numeric pain rating score at rest and on coughing or movement at 24 h following surgery and the opioid requirement at 24 h. Clinical aspects of recovery were postoperative ileus, surgical site infection, postoperative nausea and vomiting, and length of hospital stay.

RESULTS

Sixteen studies were included in the analysis. Data showed that TAP block is a safe procedure associated with a significant reduction in the pain score at rest [WMD - 0.91 (95% CI - 1.56; - 0.27); p < 0.05] and on coughing or movement [WMD - 0.36 (95% CI - 0.72; - 0.01); p < 0.05] at 24 h after surgery and a significant decrease in morphine consumption in the TAP block group the day after surgery [WMD - 2.07 (95% CI - 2.63; - 1.51); p < 0.001].

CONCLUSIONS

TAP block appears to provide both an effective analgesia and a significant reduction in opioid use on the first postoperative day after colorectal surgery. Its use does not seem to lead to increased postoperative complications.

Network meta-analysis of local and regional analgesia following colorectal resection

BACKGROUND

Postoperative pain management after colorectal surgery remains challenging. Systemic opiates delivered on demand or via a patient-controlled pump have traditionally been the mainstay of treatment. Opiate analgesia is associated with slower gastrointestinal recovery and unpleasant side-effects; many regional and local analgesic techniques have been developed as alternatives.

METHODS

MEDLINE, Embase and CENTRAL databases were searched systematically for RCTs comparing analgesic techniques after major colorectal resection. A network meta-analysis was performed using a Bayesian random-effects framework with a non-informative prior. Primary outcomes included pain at rest and cumulative opiate consumption 24 h after surgery. Secondary outcomes included pain at rest and cumulative opiate consumption at 48 h, pain on movement and cough at 24 and 48 h, time to first stool, time to tolerance of oral diet, duration of hospital stay, nausea and vomiting, and postoperative complications.

RESULTS

Seventy-four RCTs, including 5101 patients and 11 different techniques, were included. Some inconsistency and heterogeneity was found. SUCRA scores showed that spinal analgesia was the best intervention for postoperative pain and opiate reduction at 24 h. Transversus abdominus plane blocks were effective in reducing pain and opiate consumption 24 h after surgery. Subgroup analysis showed similar results for open versus minimally invasive surgical approaches, and enhanced recovery after surgery programmes.

CONCLUSION

Spinal analgesia and transversus abdominus plane blocks best balanced pain control and opiate minimization in the immediate postoperative phase following colorectal resection. Multimodal analgesia reduces pain, minimizes systemic opiate use and optimizes postoperative recovery.

Analgesic efficacy of pre-emptive local wound infiltration plus laparoscopic-assisted transversus abdominis plane block versus wound infiltration in patients undergoing laparoscopic colorectal resection: results from a randomized, multicenter, single-blind, non-inferiority trial

BACKGROUND

Transversus abdominis plane (TAP) block is considered a reliable locoregional technique for pain control after laparoscopic colorectal surgery. However, no clear benefit of TAP block over wound infiltration has been demonstrated by the current literature. This multicenter randomized clinical trial tested the non-inferiority of wound infiltration (WI) compared to WI plus laparoscopic-assisted TAP block (L-TAP).

METHODS

All patients with colorectal cancer and diverticular disease scheduled for laparoscopic resection at the Division of General and Hepatobiliary Surgery, University of Verona Hospital Trust, Verona, Italy and at the Colorectal Cancer Center, Kyungpook National University Medical Center, Kyungpook National University, Daegu, Korea, between April 2018 and March 2019 were considered for the trial. Patients were randomly allocated to either the WI group or the WI plus L-TAP group in a 1:1 allocation ratio. In total, 108 patients entered the study and 102 patients were analyzed; 50 patients received WI plus L-TAP and 52 patients received WI. The primary end point was the efficacy in pain control at 6 h measured according to Numeric Rating Scale (NRS). Secondary aims evaluated pain control at 12, 24, 48 and 72 h and other short-term results related to pain management.

RESULTS

Estimation of pain intensity at 6 h was comparable between the two groups (p = 0.16) with a mean (95% CI) difference in pain scores of 0.94 (- 0.13 to 2.02). No differences in pain scores were observed at other interval times or considering analgesic consumption, return of bowel function, postoperative complications and length of hospital stay.

CONCLUSION

This study suggests that adding TAP block to WI does not affect pain control, amount of analgesics and other short-term outcomes.

TRIAL REGISTRATION

NCT03376048 ( https://www.clinicaltrials.gov ).

Reducing the pain: A cost-effectiveness analysis of transversus abdominis plane block using liposomal bupivacaine for outpatient laparoscopic ventral hernia repair

Background

Transversus abdominis plane block with liposomal bupivacaine has been studied as an effective method of reducing the need for postoperative opioids and increasing same-day discharge rates. However, less is known about the cost-effectiveness of this strategy relative to opioids alone for hernia repair. We performed an economic evaluation of these strategies using a computer simulation model.

Methods

A decision tree was constructed to determine cost-effectiveness as measured by incremental cost-effectiveness ratios per quality-adjusted life-year. Base-case costs, quality-adjusted life-year values, and probabilities were derived from published studies and Medicare fee schedules. For input parameters for which we could not find values in the published literature, we used expert opinion. A 1-month time horizon was selected to focus on the immediate postoperative period. Finally, we performed 1-way, 2-way, and probabilistic sensitivity analyses.

Results

The liposomal bupivacaine transversus abdominis plane block was a dominant strategy yielding a $456.75 decrease in cost and an 0.1 increase in quality-adjusted life-years relative to opioids alone. In 1-way sensitivity analysis of cost incremental cost-effectiveness ratio, values were most sensitive to variations in the amount saved by same-day discharge and the cost of bupivacaine. In probabilistic sensitivity analyses, transversus abdominis plane strategy was cost-effective at a willingness-to-pay threshold of $50,000/quality-adjusted life-year in 94.5% of iterations and at a willingness-to-pay threshold of $100,000/quality-adjusted life-year in 97.1% of iterations.

Conclusion

The use of liposomal bupivacaine transversus abdominis plane block resulted in cost savings and improved quality-adjusted life-years in base-case analyses and was cost-effective at conventional willingness-to-pay thresholds in the majority of iterations in probabilistic sensitivity analyses.

•

A decision tree was constructed to determine cost-effectiveness as measured by incremental cost-effectiveness ratios (ICER) per quality-adjusted life-year (QALY).

•

The liposomal bupivacaine TAP block was a dominant strategy yielding a $456.75 decrease in cost and an 0.1 increase in QALYs relative to opioids alone.

•

In 1-way sensitivity analysis of cost, ICER values were most sensitive to variations in the amount saved by SDD and the cost of bupivacaine.

•

In probabilistic sensitivity analyses, TAP strategy was cost-effective at a willingness-to-pay threshold of $50,000/QALY in 94.5% of iterations and pay threshold of $100,000/QALY in 97.1% of iterations.

Transversus Abdominis Plane Block

In this narrative review article, the authors discuss the anatomy, nomenclature, history, approaches (posterior vs. lateral vs. subcostal), techniques, pharmacology, indications, and complications of transversus abdominis plane blocks, as well as possible alternative truncal blocks.

Despite the scarcity of evidence and contradictory findings, certain clinical suggestions can nonetheless be made. Overall transversus abdominis plane blocks appear most beneficial in the setting of open appendectomy (posterior or lateral approach). Lateral transversus abdominis plane blocks are not suggested for laparoscopic hysterectomy, laparoscopic appendectomy, or open prostatectomy. However, transversus abdominis plane blocks could serve as an analgesic option for Cesarean delivery (posterior or lateral approach) and open colorectal section (subcostal or lateral approach) if there exist contraindications to intrathecal morphine and thoracic epidural analgesia, respectively.

Future investigation is required to compare posterior and subcostal transversus abdominis plane blocks in clinical settings. Furthermore, posterior transversus abdominis plane blocks should be investigated for surgical interventions in which their lateral counterparts have proven not to be beneficial (e.g., laparoscopic hysterectomy/appendectomy, open prostatectomy). More importantly, because posterior transversus abdominis plane blocks can purportedly provide sympathetic blockade and visceral analgesia, they should be compared with thoracic epidural analgesia for open colorectal surgery. Finally, transversus abdominis plane blocks should be compared with newer truncal blocks (e.g., erector spinae plane and quadratus lumborum blocks) with well-designed and adequately powered trials.

Efficacy of laparoscopic-guided transversus abdominis plane block for patients undergoing robotic-assisted gynaecologic surgery: A randomised control trial

Background and Aims:

Transverse abdominis plane (TAP) block has been used regularly as part of multimodal analgesia for caesarean sections and other lower abdominal surgeries. Adequate postoperative analgesia provided with regional blocks allows faster postoperative recovery and better patient satisfaction. In our study, we are comparing the analgesic efficacy of laparoscopic-guided TAP block with port infiltration using a local anaesthetic in patients undergoing gynaecologic robotic surgeries.

Methods:

After obtaining approval from the hospital ethics committee, Central Trial Registry of India (CTRI) clearance and written informed consent from patients, this prospective double-blinded randomised control trial was conducted on patients undergoing robotic-assisted gynaecologic surgery under general anaesthesia. Group B patients received bilateral TAP block under direct laparoscopic vision with 15 ml of 0.1% ropivacaine on each side and Group C patients received routine port site infiltration with 30 ml of 0.1% ropivacaine. Postoperative pain score was measured till 24 hours, need for rescue analgesics, complications associated were noted. Independent two sample 't' test, Mann Whitney u test, Chi-square and Fisher's exact test were used for statistical analysis.

Results:

Pain score was significantly lower in Group B patients up to 24h (P < 0.001). The use of rescue analgesic was also significantly less in group B compared to Group C (P < 0.001). No adverse events were noted in both groups.

Conclusion:

Laparoscopic-guided TAP block is effective and superior to port site infiltration in providing postoperative analgesia in patients undergoing robotic-assisted gynaecologic surgery.

Surgeon-delivered laparoscopic transversus abdominis plane blocks are non-inferior to anesthesia-delivered ultrasound-guided transversus abdominis plane blocks: a blinded, randomized non-inferiority trial

BACKGROUND

The transversus abdominis plane (TAP) block is an important non-narcotic adjunct for post-operative pain control in abdominal surgery. Surgeons can use laparoscopic guidance for TAP block placement (LTAP), however, direct comparisons to conventional ultrasound-guided TAP (UTAPs) have been lacking. The aim of this study is to determine if surgeon placed LTAPs were non-inferior to anesthesia placed UTAPs for post-operative pain control in laparoscopic colorectal surgery.

METHODS

This was a prospective, randomized, patient and observer blinded parallel-arm non-inferiority trial conducted at a single tertiary academic center between 2016 and 2018 on adult patients undergoing laparoscopic colorectal surgery. Narcotic consumption and pain scores were compared for LTAP vs. UTAP for 48 h post-operatively.

RESULTS

60 patients completed the trial (31 UTAP, 29 LTAP) of which 25 patients were female (15 UTAP, 10 LTAP) and the mean ages (SD) were 60.0 (13.6) and 61.5 (14.3) in the UTAP and LTAP groups, respectively. There was no significant difference in post-operative narcotic consumption between UTAP and LTAP at the time of PACU discharge (median [IQR] milligrams of morphine, 1.8 [0-4.5] UTAP vs. 0 [0-8.7] LTAP P = .32), 6 h post-operatively (5.4 [1.8-17.1] UTAP vs. 3.6 [0-12.6] LTAP P = .28), at 12 h post-operatively (9.0 [3.6-29.4] UTAP vs. 7.2 [0.9-22.5] LTAP P = .51), at 24 h post-operatively (9.0 [3.6-29.4] UTAP vs. 7.2 [0.9-22.5] LTAP P = .63), and 48 h post-operatively (39.9 [7.5-70.2] UTAP vs. 22.2 [7.5-63.8] LTAP P = .41). Patient-reported pain scores as well as pre-, intra-, and post-operative course were similar between groups. Non-inferiority criteria were met at all post-op time points up to and including 24 h but not at 48 h.

CONCLUSIONS

Surgeon-delivered LTAPs are safe, effective, and non-inferior to anesthesia-administered UTAPs in the immediate post-operative period.

TRIAL REGISTRY

The trial was registered at clinicaltrials.gov Identifier NCT03577912.