Comparative effectiveness of surgeon-performed transversus abdominis plane blocks and epidural catheters following open hernia repair with transversus abdominis release

PURPOSE

Recovery protocols aim to limit narcotic administration following ventral hernia repair (VHR). However, little is known about the contribution of a protocol's individual components on patient outcomes. We previously reported that surgeon-performed transversus abdominis plane block (TAP-block) is more effective than ultrasound-guided TAP-block following VHR. This study evaluates the effectiveness of two postoperative analgesia modalities: epidural catheter and surgeon-performed TAP-block following VHR performed with transversus abdominis release (TAR).

METHODS

A retrospective analysis was performed on data prospectively collected between 2012 and 2019. All patients undergoing open VHR with TAR performed by a single surgeon were identified. Parastomal hernia repairs and any patients receiving ultrasound-guided TAP blocks or paraspinal blocks were excluded. Primary outcome was length of stay (LOS) with secondary outcomes including pain scores, opioid requirements, and 30-day morbidity. Linear regression was used to model LOS.

RESULTS

One hundred thirty-five patients met inclusion criteria (63 epidural, 72 TAP-block). The majority (67.4%) of patients were modified ventral hernia working group grade 2. The only statistically significant difference in postoperative pain scores between the groups was on postoperative day 2 (TAP block 3.19 versus epidural 4.11, p = 0.0126). LOS was significantly shorter in the TAP block group (4.7 versus 6.2 days, p = 0.0023) as was time to regular diet (3.2 versus 4.7 days, p < 0.0001). After controlling for confounders, epidural was associated with increased LOS by 1.3 days (p = 0.0004).

CONCLUSION

Epidural use following VHR with TAR is associated with increased LOS and increased time to regular diet without reducing pain or opioid use when compared to surgeon-performed TAP block.

Epidural Analgesia Is Associated with Prolonged Length of Stay After Open HPB Surgery in Over 27,000 Patients

BACKGROUND

The impact of epidural analgesia (EA) on postoperative morbidity and length of stay (LOS) after HPB surgery remains to be determined. These specific outcomes have been highlighted by the implementation of multiple enhanced recovery pathways (ERAS). The authors hypothesized that EA in the current environment may be associated with LOS and other outcomes.

METHODS

The American College of Surgeons (ACS) National Surgical Quality Improvement Program (NSQIP) databases from 2014 to 2017 for patients undergoing open hepatopancreaticobiliary (HPB) surgery were included in a retrospective cohort analysis with propensity score matching (PSM) comparing EA with control.

RESULTS

Twenty-seven thousand two hundred eighteen patients underwent open HPB surgery, of which 6048 (22%) received EA. There was an increase use of EA over time (from 19.3 to 25.5%, p = 0.001). On PSM, EA was associated with more than half of a day increase in LOS for both pancreatic (p < 0.001) and hepatic surgery (p < 0.001). Furthermore, for pancreatic surgery, there was an increase in urinary tract infection (2.5% vs. 3.3%, p = 0.018), time to drain removal (7.8 vs. 8.7 days, p < 0.001), and discharge to rehabilitation (2.9% vs. 4.3%, p = 0.029). For hepatic surgery, there was an increase in blood transfusion requirements (17% vs. 20%, p = 0.019). There were no differences in overall morbidity and mortality.

CONCLUSION

In this cohort of over 27,000 patients with granular surgical details, there was a significant increase in LOS associated with EA after HPB surgery, along with increased procedure-specific UTI and blood transfusion. With the ever-increasing need for standardized and efficient patient care pathways that reduce LOS, alternative analgesic adjuncts may be considered to optimize patient outcomes.

Epidural analgesia for hepatopancreatobiliary operations and postoperative urinary tract infections: an unrecognized association of "best-practices" and adverse outcomes

BACKGROUND

Thoracic epidural analgesia (TEA) is considered "best-practices" for pain-control following HPB operations. It is unknown if TEA increases the risk of UTI. We sought to examine the association of TEA and UTI following HPB operations.

METHODS

A retrospective cohort study of patients undergoing elective HPB operations was performed (ACS-NSQIP [2014-2016]). Patients were categorized by TEA utilization. The primary outcome was UTI. Multivariable logistic regression models were created to examine the association of TEA with UTI; including sensitivity and interaction analyses for age and gender.

RESULTS

Among 28,571 patients included, 5764 (20.2%) had TEA. UTI occurred more frequently with TEA (3.5% vs. 2.2%, p < 0.01). After multivariable analysis, TEA was associated with increased risk of UTI (1.59 [1.34-1.89]); when stratified by age and gender, the association persisted with an incremental increased risk observed in males over 70 years (1.91 [1.41-2.59]). UTI was associated with increased risk of sepsis (16.8% vs. 5.6%, P < 0.001), LOS (9 versus 6 days, P < 0.001) and readmission rates (21.4% vs. 12.3%, P < 0.001).

CONCLUSION

Despite TEA recommended as a best-practice standard for HPB operations, the increased risk of UTI calls for evaluation of current practices and consideration of alternative strategies for high-risk vulnerable populations - elderly males.

Modeling drug exposure in rodents using e-cigarettes and other electronic nicotine delivery systems

Smoking tobacco products is the leading cause of preventable death worldwide. Coordinated efforts have successfully reduced tobacco cigarette smoking in the United States; however, electronic cigarettes (e-cigarette) and other electronic nicotine delivery systems (ENDS) recently have replaced traditional cigarettes for many users. While the clinical risks associated with long-term ENDS use remain unclear, advancements in preclinical rodent models will enhance our understanding of their overall health effects. This review examines the peripheral and central effects of ENDS-mediated exposure to nicotine and other drugs of abuse in rodents and evaluates current techniques for implementing ENDS in preclinical research.