Systematic review and meta-analysis of continuous local anaesthetic wound infiltration versus epidural analgesia for postoperative pain following abdominal surgery

Continuous wound infusion as a valid alternative to tap block for postoperative analgesia after abdominal hysterectomy: A randomized controlled trial

Background

Total abdominal hysterectomy is a procedure associated with moderate to severe postoperative pain. Regional anesthesia techniques, such as fascial plane blocks, have shown promise in improving postoperative pain control. While continuous wound infusion is recommended for cesarean section, it is not recommended for open abdominal hysterectomy. Our aim is to compare surgically placed catheter for wound infusion with the transverse abdominis plane block.

Methods

A single-center prospective randomized controlled trial was conducted in Italy from January to July 2023. Patients undergoing elective hysterectomy were randomly assigned to receive either bilateral transverse abdominis plane block or continuous wound infusion. The primary outcome measure was the assessment of static pain in the recovery room and at 6, 12, 24, and 48 hours postoperatively using the numeric rating scale (NRS) for pain. Of the 34 patients assessed for eligibility, 32 were randomized and equally distributed between the continuous wound infusion and transverse abdominis plane block groups.

Result

Patients receiving continuous wound infusion consistently reported lower static NRS pain scores compared to those receiving transverse abdominis plane block across all postoperative time points. The median NRS scores were significantly lower in the wound infusion group at 6, 12, 24, and 48 hours post surgery (P < 0.05). Importantly, similar significant differences were also observed between the groups for dynamic NRS scores. However, no significant differences were observed between the groups for secondary outcomes, including nausea and vomiting, and recovery of functional capacity.

Conclusion

Continuous wound infusion with a properly positioned catheter is noninferior to transverse abdominis plane block for postoperative pain management following total abdominal hysterectomy and may even provide superior pain control. These findings suggest continuous wound infusion as a viable alternative for effective pain management in total abdominal hysterectomy procedures.

The efficacy of wound catheter infusion with local anesthetics for the treatment of postoperative pain in children: A systematic review

Wound catheter infusion (WCI) with local anesthetics (LA) is a regional anesthesia technique, which has shown to produce effective postoperative analgesia in adults, without any adverse effects on wound healing. To investigate the efficacy and safety of WCI with LA for the treatment of postoperative pain in children, we conducted a systematic review of literature published until 2020. The literature search included articles concerning subcutaneous WCI with LA, in the surgical wound, as treatment of postoperative pain, in children <18 years of age. Exclusion criteria were studies describing peripheral nerve blocks, intercostal, abdominal or thoracic wall blocks and single local anesthetic infiltration of the surgical wound. The articles were appraised for quality and only randomized controlled trials with a Jadad score ≥3 were included for evaluation of results concerning postoperative pain scores and opioid use. All relevant original studies, including observational studies and case reports, were assessed for adverse events and measurements of LA plasma concentrations during WCI. A total of 1907 articles were found, leading to 92 relevant abstracts selected for further review. After exclusion of articles of which full texts could not be retrieved or because of exclusion criteria, 28 articles remained. Thirteen articles described randomized controlled trials, of which 10 were assessed as good or excellent in quality. Due to the small number and heterogeneity of the studies, the data could not be pooled. Instead, results were described per type of procedure: abdominal surgery, extremity surgery, thoracic surgery and iliac crest bone harvesting. Reduced pain scores and opioid needs were demonstrated after abdominal and extremity surgery. In five studies, plasma levels of LA were measured, which all remained below toxic thresholds. In all relevant studies, no serious adverse events concerning the use of WCI were reported.

Spinal analgesia with continuous local wound infusion vs thoracic epidural analgesia after open pancreaticoduodenectomy

BACKGROUND

The current gold standard for postoperative analgesia following a pancreaticoduodenectomy (PD) is a thoracic epidural analgesia (TEA). Spinal analgesia with continuous wound infusion (CWI) of local anaesthetic is an emerging alternative modality. This non-inferiority study aimed to compare CWI with spinal analgesia to TEA and assess its impact on clinical outcomes.

METHODS

A retrospective observational analysis of patients undergoing open pancreatoduodenectomy through a midline laparotomy. A total of 74 patients were included in the study forming two groups: CWI (n = 33) and TEA (n = 41).

RESULTS

TEA resulted in lower median pain scores at rest (p = 0.002) and with coughing (p = 0.005) on postoperative day 2. CWI was non-inferior to TEA for all other pain outcomes measures from days 0-5. Patients in the CWI group had a shorter time to first bowel motion (p = 0.001), commencement of a liquid diet (p = 0.04), earlier removal of nasogastric tube (p = 0.005), abdominal drain (p = 0.003) and indwelling catheter (p < 0.001). Analgesic failure and postoperative nausea and vomiting were also less frequent (p = 0.001 and p < 0.001 respectively).

CONCLUSION

Local CWI with spinal analgesia was non-inferior to TEA for pain management in open pancreaticoduodenectomy. CWI demonstrated advantages in measures associated with enhanced recovery after surgery programs without disadvantages in terms of analgesia requirements.

Efficacy and safety of ketamine wound infiltration for postoperative pain management: a systematic review, meta-analysis, and trial sequential analysis

Background

Postoperative pain has a huge impact on the patients, families, healthcare practitioners, and healthcare delivery. Pain management with opioid-based analgesics and blind techniques have certain limitations, and ultrasound-based regional analgesia necessitates resources and experience, but ketamine wound infiltration is innovative with few side effects. However, its effectiveness is still uncertain.

Methods

A thorough search was carried out across various databases including PubMed/Medline, Cochrane, ScienceDirect, CINAHL, and LILACS, with no limitations on date or language. Only randomized trials comparing the effectiveness of ketamine wound infiltration for managing postoperative pain were considered for inclusion. Two authors independently conducted data extraction, and the quality of evidence was assessed using GRADEpro software. Trial sequential analysis (TSA) was utilized to ascertain the conclusiveness of the findings.

Results

The review showed that the first analgesic request was higher in the control group as compared to ketamine standard mean difference (SMD)=1.68 (95% CI: 0.95-2.41). The TSA revealed that the cumulative Z-curve crosses both alpha-spending boundaries and reaches the required information size threshold, revealing strong power for current evidence. However, the quality of evidence was moderate.

Conclusion

Despite available evidence, the provision of a firm conclusion is less optimal with current evidence as the included studies were unpowered with low to very low quality of evidence.

Perioperative pain management with regional analgesia techniques for visceral cancer surgery: A systematic review and meta-analysis

STUDY OBJECTIVE

Regional analgesia following visceral cancer surgery might provide an advantage but evidence for best treatment options related to risk-benefit is unclear.

DESIGN

Systematic review of randomized controlled trials (RCT) with meta-analysis and GRADE assessment.

SETTING

Postoperative pain treatment.

PATIENTS

Adult patients undergoing visceral cancer surgery.

INTERVENTIONS

Any kind of peripheral (PRA) or epidural analgesia (EA) with/without systemic analgesia (SA) was compared to SA with or without placebo treatment or any other regional anaesthetic techniques.

MEASUREMENTS

Primary outcome measures were postoperative acute pain intensity at rest and during activity 24 h after surgery, the number of patients with block-related adverse events and postoperative paralytic ileus.

MAIN RESULTS

59 RCTs (4345 participants) were included. EA may reduce pain intensity at rest (mean difference (MD) -1.05; 95% confidence interval (CI): -1.35 to -0.75, low certainty evidence) and during activity 24 h after surgery (MD -1.83; 95% CI: -2.34 to -1.33, very low certainty evidence). PRA likely results in little difference in pain intensity at rest (MD -0.75; 95% CI: -1.20 to -0.31, moderate certainty evidence) and pain during activity (MD -0.93; 95% CI: -1.34 to -0.53, moderate certainty evidence) 24 h after surgery compared to SA. There may be no difference in block-related adverse events (very low certainty evidence) and development of paralytic ileus (very low certainty of evidence) between EA, respectively PRA and SA.

CONCLUSIONS

Following visceral cancer surgery EA may reduce pain intensity. In contrast, PRA had only limited effects on pain intensity at rest and during activity. However, we are uncertain regarding the effect of both techniques on block-related adverse events and paralytic ileus. Further research is required focusing on regional analgesia techniques especially following laparoscopic visceral cancer surgery.

Use of wound infusion catheters for delivery of local anesthetic following standing partial ostectomy of thoracolumbar vertebral spinous processes in horses is not associated with increased surgical site infections

Background

Wound infusion catheters (WICs) have been used in humans and some veterinary species for post-operative local anesthetic administration following a variety of surgical procedures, aiming to reduce post-operative analgesia requirements and improve patient comfort. Benefit in reduction in pain, post-operative analgesia requirements and length of hospital stay are well documented in humans, but use of WICs may not have been widely adopted in veterinary species due to the concern of increased complications, such as dehiscence or surgical site infection (SSI), creating a barrier to their use. This study aimed to evaluate the use of WICs in horses undergoing standing partial ostectomy surgeries, document complications and investigate if the incidence of SSI was equivalent between those horses that did and did not have a WIC.

Methods

Clinical records were searched between January 2010-December 2023 for horses undergoing standing partial ostectomy surgery of thoracolumbar vertebral spinous processes at one institution. Population variables (age, breed, bodyweight), placement of a WIC or not, post-operative complications, analgesia protocols and surgical time were recorded. Horses received up to 0.1 mg kg-1 bupivacaine (0.5 mg mL-1) every 6-8 h via the WIC where one was placed. To compare SSI complication incidence between using or not using a WIC, a proportional independent equivalence test was used.

Results

There were 64 horses included in the final analysis with a WIC placed in 29/64 horses (45.3%) and 35/64 (54.7%) having no WIC placed at surgery. Incidence of short-term SSI was 11.4% (no WIC used) and 13.8% (WIC used), respectively. The difference in proportion of SSI between the presence or absence of a WIC was not significant [-0.024 (90% CI -0.181; 0.133); p = 0.94].

Conclusion

The incidence of SSIs was equivalent between groups whether a WIC was used or not. WICs should be considered as part of a multi-modal analgesic approach in the post-operative period. Further research into local anesthetic dosing and its impact on rescue analgesia requirements and pain-scores is warranted.

Loco-Regional Anesthesia for Pain Management in Robotic Thoracic Surgery

Robotic thoracic surgery is a prominent minimally invasive approach for the treatment of various thoracic diseases. While this technique offers numerous benefits including reduced blood loss, shorter hospital stays, and less postoperative pain, effective pain management remains crucial to enhance recovery and minimize complications. This review focuses on the application of various loco-regional anesthesia techniques in robotic thoracic surgery, particularly emphasizing their role in pain management. Techniques such as local infiltration anesthesia (LIA), thoracic epidural anesthesia (TEA), paravertebral block (PVB), intercostal nerve block (INB), and erector spinae plane block (ESPB) are explored in detail regarding their methodologies, benefits, and potential limitations. The review also discusses the imperative of integrating these anesthesia methods with robotic surgery to optimize patient outcomes. The findings suggest that while each technique has unique advantages, the choice of anesthesia should be tailored to the patient's clinical status, the complexity of the surgery, and the specific requirements of robotic thoracic procedures. The review concludes that a multimodal analgesia strategy, potentially incorporating several of these techniques, may offer the most effective approach for managing perioperative pain in robotic thoracic surgery. Future directions include refining these techniques through technological advancements like ultrasound guidance and exploring the long-term impacts of loco-regional anesthesia on patient recovery and surgical outcomes in the context of robotic thoracic surgery.

Continuous wound infusion catheter as part of a multimodal analgesia regimen for post-Caesarean delivery pain: a quality improvement impact study

Background

The role of continuous wound infusion catheters as part of a multimodal analgesia strategy after Caesarean delivery is unclear. We introduced continuous wound infusion catheters to our multimodal analgesia regimen to evaluate the impact on analgesic outcomes after Caesarean delivery.

Methods

After institutional review board (IRB) approval, a 4-month practice change was instituted as a quality improvement initiative. In addition to multimodal analgesia, continuous wound infusion catheters for up to 3 days were offered on alternate weeks for all women undergoing Caesarean deliveries. The primary outcome was postoperative in-hospital opioid consumption. Secondary outcomes were static and dynamic pain scores at 24 and 72 h, time until first analgesic request, opioid-related side-effects, length of stay, satisfaction (0-100%), and continuous wound infusion catheter-related complications.

Results

All women scheduled for Caesarean delivery (n=139) in the 4-month period were included in the analysis, with 70 women receiving continuous wound infusion catheters, and 69 in the control group. Opioid consumption (continuous wound infusion catheter group 11.3 [7.5-61.9] mg morphine equivalents vs control group 30.0 [11.3-48.8] mg morphine equivalents), pain scores (except 24 h resting pain scores which were higher in the control group 2 [1-3] vs 1.5 [0-3] in the continous wound infusion catheters group; P=0.05), side-effects, length of stay, and complications were similar between groups. Satisfaction scores at 24 h were higher with continuous wound infusion catheters (100% [91-100%] vs 90% [86-100%]; P=0.003) with no differences at 72 h. One patient demonstrated symptoms of systemic local anaesthetic toxicity which resolved without significant harm.

Conclusions

The addition of continuous wound infusion catheters to a multimodal analgesia regimen for post-Caesarean delivery pain management demonstrated minimal clinically significant analgesic benefits. Future studies are needed to explore the use of continuous wound infusion catheters in populations that may benefit most from this intervention.

To assess the analgesic efficacy of adjuvant magnesium sulfate added with ropivacaine over ropivacaine alone as a continuous infiltration in total abdominal hysterectomy wound: A randomized controlled trial

Background and Aims

Magnesium sulfate (MgSO4) has been demonstrated to have analgesic property in various clinical settings. This study explores if addition of MgSO4 to ropivacaine increases its analgesic efficacy when infiltrated continuously in the postsurgical wound following total abdominal hysterectomy.

Material and Methods

This randomized controlled trial was conducted at a tertiary care referral hospital in New Delhi, India. Fifty-two patients were randomized into two groups to receive the intervention of which 48 were able to complete the study. The first group (n = 26) received 0.25% ropivacaine infiltration and the second group (n = 26) received 0.25% ropivacaine with 5% MgSO4 at the incision site for 48 h postoperatively. Primary objective was to compare the total postoperative opioid (morphine) consumption by the study participants in both the groups and the secondary objectives were pain scores at rest and at movement, patient satisfaction score, and wound quality of life on the 7th postoperative day among the two groups.

Results

Both the groups were comparable in their demographic characteristics. The median morphine consumed at 48 h postoperatively was 16.5 [0-77] mg in the ropivacaine group and 13[1-45] mg in the ropivacaine with MgSO4 group and the difference was statistically insignificant (P = 0.788). There was no statistical difference between the groups with respect to the pain scores, patient satisfaction, or wound quality of life at 7 days.

Conclusion

The addition of MgSO4 to ropivacaine does not confer any additional postoperative analgesic benefits over ropivacaine alone in continuous wound infiltration following total abdominal hysterectomy.

Ropivacaine-loaded hydrogels for prolonged relief of chemotherapy-induced peripheral neuropathic pain and potentiated chemotherapy

Chemotherapy can cause severe pain for patients, but there are currently no satisfactory methods of pain relief. Enhancing the efficacy of chemotherapy to reduce the side effects of high-dose chemotherapeutic drugs remains a major challenge. Moreover, the treatment of chemotherapy-induced peripheral neuropathic pain (CIPNP) is separate from chemotherapy in the clinical setting, causing inconvenience to cancer patients. In view of the many obstacles mentioned above, we developed a strategy to incorporate local anesthetic (LA) into a cisplatin-loaded PF127 hydrogel for painless potentiated chemotherapy. We found that multiple administrations of cisplatin-loaded PF127 hydrogels (PFC) evoked severe CIPNP, which correlated with increased pERK-positive neurons in the dorsal root ganglion (DRG). However, incorporating ropivacaine into the PFC relieved PFC-induced CIPNP for more than ten hours and decreased the number of pERK-positive neurons in the DRG. Moreover, incorporating ropivacaine into the PFC for chemotherapy is found to upregulate major histocompatibility complex class I (MHC-I) expression in tumor cells and promote the infiltration of cytotoxic T lymphocytes (CD8+ T cells) in tumors, thereby potentiating chemotherapy efficacy. This study proposes that LA can be used as an immunemodulator to enhance the effectiveness of chemotherapy, providing new ideas for painless cancer treatment.

Analgesic efficacy of continuous wound infiltration compared with continuous intravenous fentanyl after gynaecological surgery: a non-inferiority, randomised controlled trial

OBJECTIVE

The present trial aimed to prove the non-inferiority of the analgesic efficacy of continuous wound infiltration (CWI) to that of continuous intravenous fentanyl (IV) and to compare the safety of the two methods.

METHODS

This trial was a prospective, single-centre, two-arm, non-inferiority, randomised controlled trial. Patients participating in the trial were randomised to a CWI group or an IV group. The VAS (visual analogue scale), additional analgesic usage and side effects were then compared between the groups.

RESULTS

In total, 61 patients were enrolled; two in CWI were excluded, leaving 59 (30 in the CWI group and 29 in the IV group) for analysis. The difference in the VAS score at 24 h (CWI group - IV group) was -3.2 (95% confidence interval [CI] -14.7 to 8.2), which was less than the non-inferiority margin of 15. The mean amount of total fentanyl use at postoperative hour 48 was 1395 (95% CI 886-1903) µg in the CWI group and 3186 (95% CI 2716-3658) µg in the IV group. The amount of other analgesics and the incidence of adverse effects did not differ significantly between the groups.

CONCLUSION

CWI was non-inferior to IV in terms of its analgesic effect, and has an opioid sparing effect in open gynaecological surgery.

Advances in the Management of Acute Postsurgical Pain: A Review

Despite the millions of surgeries performed every year around the world, postoperative pain remains prevalent and is often addressed with inadequate or suboptimal treatments. Chronic postsurgical pain is surprisingly prevalent, and its rate varies with the type of surgery, as well as with certain patient characteristics. Thus, better clinical training is needed as well as patient education. As pain can be caused by more than one mechanism, multimodal or balanced postsurgical analgesia is appropriate. Pharmacological agents such as opioid and nonopioid pain relievers, as well as adjuvants and nonpharmacologic approaches, can be combined to provide better and opioid-sparing pain relief. Many specialty societies have guidelines for postoperative pain management that emphasize multimodal postoperative analgesia. These guidelines are particularly helpful when dealing with special populations such as pregnant patients or infants and children. Pediatric pain control, in particular, can be challenging as patients may be unable to communicate their pain levels. A variety of validated assessment tools are available for diagnosis. Related to therapy, most guidelines agree on the fact that codeine should be used with extreme caution in pediatric patients as some may be "rapid metabolizers" and its use may be life-threatening. Prehabilitation is a preoperative approach that prepares patients in advance of elective surgery with conditioning exercises and other interventions to optimize their health. Prehabilitation may have aerobic, strength-training, nutritional, and counseling components. Logistical considerations and degree of patient adherence represent barriers to effective prehabilitation programs. Notwithstanding all this, acute postoperative pain represents a clinical challenge that has not yet been well addressed.

Consensus Guidelines for Perioperative Care for Emergency Laparotomy Enhanced Recovery After Surgery (ERAS®) Society Recommendations Part 2-Emergency Laparotomy: Intra- and Postoperative Care

BACKGROUND

This is Part 2 of the first consensus guidelines for optimal care of patients undergoing emergency laparotomy (EL) using an Enhanced Recovery After Surgery (ERAS) approach. This paper addresses intra- and postoperative aspects of care.

METHODS

Experts in aspects of management of high-risk and emergency general surgical patients were invited to contribute by the International ERAS® Society. PubMed, Cochrane, Embase, and Medline database searches were performed for ERAS elements and relevant specific topics. Studies on each item were selected with particular attention to randomized clinical trials, systematic reviews, meta-analyses, and large cohort studies and reviewed and graded using the Grading of Recommendations, Assessment, Development and Evaluation (GRADE) system. Recommendations were made on the best level of evidence, or extrapolation from studies on elective patients when appropriate. A modified Delphi method was used to validate final recommendations. Some ERAS® components covered in other guideline papers are outlined only briefly, with the bulk of the text focusing on key areas pertaining specifically to EL.

RESULTS

Twenty-three components of intraoperative and postoperative care were defined. Consensus was reached after three rounds of a modified Delphi Process.

CONCLUSIONS

These guidelines are based on best available evidence for an ERAS® approach to patients undergoing EL. These guidelines are not exhaustive but pull together evidence on important components of care for this high-risk patient population. As much of the evidence is extrapolated from elective surgery or emergency general surgery (not specifically laparotomy), many of the components need further evaluation in future studies.

Analgesic Modalities in Patients Undergoing Open Pancreatoduodenectomy-A Systematic Review and Meta-Analysis

BACKGROUND

This systematic review explored the efficacy of different analgesic modalities and the impact on perioperative outcome in patients undergoing pancreatoduodenectomy.

METHODS

A systematic literature search was performed on PubMed, Embase, Web of Science, Scopus, and Cochrane Library Database using the PRISMA framework. The primary outcome was pain scores on postoperative day one (POD1) and postoperative day two (POD2). The secondary outcomes included length of hospital stay (LOS) and specific procedure-related complications.

RESULTS

Five randomized controlled trials and ten retrospective cohort studies were included in the systematic review. Studies compared epidural analgesia (EA), patient-controlled analgesia (PCA), continuous wound infiltration (CWI), continuous bilateral thoracic paravertebral infusion (CTPVI), intrathecal morphine (ITM), and sublingual sufentanil. The pain scores on POD1 (p < 0.001) and POD2 (p = 0.05) were higher in the PCA group compared with the EA group. Pain scores were comparable between EA and CWI plus PCA or CTPVI on POD1 and POD2. Pain scores were comparable between EA and ITM on POD1. The procedure-related complications and length of hospital stay were not significantly different according to the type of analgesia.

CONCLUSIONS

EA provided lower pain scores compared with PCA on the first postoperative day after pancreatoduodenectomy; the length of hospital stay and procedure-related complications were similar between EA and PCA. CWI and CTPVI provided similar pain relief to EA.

Efficacy of a continuous wound infiltration system for postoperative pain management in gynecologic patients who underwent single-port access laparoscopy for adnexal disease

Introduction

Single-port access (SPA) laparoscopy requires only one incision, unlike conventional laparoscopy. However, its umbilical incision is larger than that of conventional laparoscopy and can be vulnerable to postoperative pain. This study aimed to evaluate whether simultaneous use of a continuous wound infiltration (CWI) system and intravenous patient-controlled analgesia (IV PCA) effectively decreases surgical site pain in patients who underwent SPA laparoscopy due to gynecologic adnexal disease.

Methods

A total of 371 patients who underwent SPA laparoscopy and who received IV PCA or CWI was retrospectively reviewed (combined group [CWI + IV PCA, n = 159] vs. PCA group [IV PCA only, n = 212]). To evaluate postoperative pain management, the numeric rating scale (NRS) pain score after surgery, total amount of fentanyl administered via IV PCA, and additional pain killer consumption were collected.

Results

The NRS scores at 12 h (1.90 ± 1.11 vs. 2.70 ± 1.08, p < 0.001) and 24 h (1.82 ± 0.82 vs. 2.11 ± 1.44, p = 0.026) after surgery were significantly lower in the combined group than in the PCA group. The total amount of PCA fentanyl was significantly smaller in the combined group than in the PCA group (p < 0.001). The total quantity of rescue analgesics was smaller in the combined group than in the PCA group (p < 0.05).

Conclusion

Combined use of the CWI system and IV PCA is an effective postoperative pain management strategy in patient who underwent SPA laparoscopy for adnexal disease.

Locoregional strategies to decrease postoperative pain and neck discomfort after open thyroidectomy: A scoping review

Adequate pain control enhances patients' quality of life and allows a quick return to normal activities. Current pain management practices may contribute to the crisis of opioid addiction. We summarize the evidence that evaluates locoregional interventions to decrease pain and neck discomfort after thyroidectomy. We designed a scoping review. The search strategy was made in the Pubmed/MEDLINE and EMBASE database. We included only systematic reviews and RCTs that compared two or more strategies. Forty-nine publications including 5045 patients fulfilled criteria. Sore throat frequency is higher for endotracheal intubation and topical administration of anesthetic before intubation decreases this. Pre-incisional infiltration of the surgical wound decreases postoperative pain. Bilateral superficial plexus nerve block decreases analgesic requirements during and after thyroidectomy. Wound massage and neck exercises decrease postoperative discomfort. Locoregional interventions significantly impact postoperative pain and may reduce opioid use and improve patient outcomes.

Prolonged continuous wound infusion of local anesthetic and steroid after major abdominal surgery to reduce opioid consumption: a randomized, double-blind trial

BACKGROUND

Continuous wound infusion (CWI) is effective for post-operative pain management, but the effect of prolonged infusions and the use of steroids in the infused mixture have never been addressed. We investigate the effect of prolonged CWI with ropivacaine 0.2% (R) over seven days and methylprednisolone (Mp) 1 mg/kg infused in the wound in the first 24 hours.

METHODS

This is a randomized, double blind, phase III trial (RCT) in major abdominal surgery with laparotomy. After a 24-hours pre-peritoneal CWI of R-Mp, patients were randomized to receive either R-Mp or placebo for the next 24 hours. Then, patient-controlled CWI with only ropivacaine 0.2% or placebo (according to the randomization group) was planned between 48 hours and seven days after surgery. Morphine equivalents at seven days were analyzed, together with any catheter- or drug-related side effect and PPSP at 3 months.

RESULTS

We enrolled 120 patients (63 in the CWI group, 57 in the placebo group). Prolonged CWI did not reduce opioid consumption in the first seven postoperative days (P=0.08). CWI was associated with reduced consumption of non-opioid analgesics (P=0.03). Most of the patients continued to require bolus in the surgical wound beyond 48 hours. PPSP prevalence was not different between groups.

CONCLUSIONS

Prolonged infusion with R-Mp is safe and effective but did not reduce opioid consumption in the seven days after surgery or PPSP prevalence.

A prospective cohort study to evaluate continuous wound infusion with local analgesics within an enhanced recovery protocol after colorectal cancer surgery

AIM

To reduce detrimental opioid-related side effects, minimising the postoperative opioid consumption is needed, especially in older patients. Continuous wound infusion (CWI) with local analgesics appears to be an effective opioid-sparing alternative. However, the added value of CWI to an enhanced recovery protocol after colorectal cancer (CRC) surgery is unclear. The aim of this study was to evaluate the outcomes of CWI after CRC surgery within a strictly adhered to enhanced recovery protocol.

METHODS

In this multicentre prospective observational cohort study, patients who underwent CRC surgery between May 2019 and January 2021 were included. Patients were treated with CWI as adjunct to multimodal pain management within an enhanced recovery protocol. Postoperative opioid consumption, pain scores and outcomes regarding functional recovery were evaluated.

RESULTS

A cohort of 130 consecutive patients were included, of whom 36.2% were ≥75 years. Postoperative opioids were consumed by 80 (61.5%) patients on postoperative day 0, and by 28 (21.5%), 27 (20.8%), and 18 (13.8%) patients on postoperative days 1, 2, and 3, respectively. Median pain scores were <4 on all days. The median time until first passage of stool was 1.0 (IQR: 1.0-2.0) day. Postoperative delirium occurred in 0.8%. Median length of hospital stay was 3.0 days (IQR: 2.0-5.0).

CONCLUSION

In patients treated with CWI, low amounts of postoperative opioid consumption, adequate postoperative pain control, and enhanced recovery were observed. CWI seems a beneficial opioid-sparing alternative and may further improve the outcomes of an enhanced recovery protocol after CRC surgery, which seems especially valuable for older patients.

Efficacy and safety of wound infiltration modalities for postoperative pain management after cesarean section: a systematic review and network meta-analysis protocol

BACKGROUND

Postoperative pain after a cesarean section has negative consequences for the mother during the postoperative period. Over the years, various postoperative pain management strategies have been used following cesarean section. Opioid-based analgesics and landmark approaches have negative side effects, while ultrasound-based regional analgesia necessitates resources and experience, but various wound infiltration adjuvants are innovative with few side effects and are simple to use. The efficacy and safety of each adjuvant, however, are unknown and require further investigation.

OBJECTIVE

This network meta-analysis is intended to provide the most effective wound infiltration drugs for postoperative management after cesarean section.

METHOD

A comprehensive search will be conducted in PubMed/MEDLINE, Cochrane Library, Science Direct, CINHAL, and LILACS without date and language restrictions. All randomized trials comparing the effectiveness of wound infiltration drugs for postoperative pain management after cesarean section will be included. Data extraction will be conducted independently by two authors. The quality of studies will be evaluated using the Cochrane risk of bias tool, and the overall quality of the evidence will be determined by GRADEpro software.

DISCUSSION

The rate of postoperative acute and chronic pain is very high which has a huge impact on the mother, family, healthcare practitioners, and healthcare delivery. It is a basic human right to give every patient with postoperative pain treatment that is realistic in terms of resources, technique, cost, and adverse event profile.

SYSTEMATIC REVIEW REGISTRATION

PROSPERO CRD42021268774.

Optimal postoperative pain management after VATS lung resection by thoracic epidural analgesia, continuous paravertebral block or single-shot intercostal nerve block (OPtriAL): study protocol of a three-arm multicentre randomised controlled trial

BACKGROUND

Adequate pain control after video-assisted thoracoscopic surgery (VATS) for lung resection is important to improve postoperative mobilisation, recovery, and to prevent pulmonary complications. So far, no consensus exists on optimal postoperative pain management after VATS anatomic lung resection. Thoracic epidural analgesia (TEA) is the reference standard for postoperative pain management following VATS. Although the analgesic effect of TEA is clear, it is associated with patient immobilisation, bladder dysfunction and hypotension which may result in delayed recovery and longer hospitalisation. These disadvantages of TEA initiated the development of unilateral regional techniques for pain management. The most frequently used techniques are continuous paravertebral block (PVB) and single-shot intercostal nerve block (ICNB). We hypothesize that using either PVB or ICNB is non-inferior to TEA regarding postoperative pain and superior regarding quality of recovery (QoR). Signifying faster postoperative mobilisation, reduced morbidity and shorter hospitalisation, these techniques may therefore reduce health care costs and improve patient satisfaction.

METHODS

This multi-centre randomised study is a three-arm clinical trial comparing PVB, ICNB and TEA in a 1:1:1 ratio for pain (non-inferiority) and QoR (superiority) in 450 adult patients undergoing VATS anatomic lung resection. Patients will not be eligible for inclusion in case of contraindications for TEA, PVB or ICNB, chronic opioid use or if the lung surgeon estimates a high probability that the operation will be performed by thoracotomy.

PRIMARY OUTCOMES

(1) the proportion of pain scores ≥ 4 as assessed by the numerical rating scale (NRS) measured during postoperative days (POD) 0-2; and (2) the QoR measured with the QoR-15 questionnaire on POD 1 and 2. Secondary outcome measures are cumulative use of opioids and analgesics, postoperative complications, hospitalisation, patient satisfaction and degree of mobility.

DISCUSSION

The results of this trial will impact international guidelines with respect to perioperative care optimization after anatomic lung resection performed through VATS, and will determine the most cost-effective pain strategy and may reduce variability in postoperative pain management. Trial registration The trial is registered at the Netherlands Trial Register (NTR) on February 1st, 2021 (NL9243). The NTR is no longer available since June 24th, 2022 and therefore a revised protocol has been registered at ClinicalTrials.gov on August 5th, 2022 (NCT05491239).

PROTOCOL VERSION

version 3 (date 06-05-2022), ethical approval through an amendment (see ethical proof in the Study protocol proof).

Analgesic Effects of Continuous Wound Infusion Combined with Intravenous Patient-Controlled Analgesia for Thoracic Surgery: A Retrospective Study

Continuous wound infusion analgesia (CWA) with local anesthetics is a loco-regional anesthetic approach for multimodal analgesia management in surgical procedures. This study analyzed whether the combination of intravenous patient-controlled analgesia (PCA) and CWA would be more effective than PCA alone for postoperative analgesia and in preventing chronic postsurgical pain syndrome (PSPS) after thoracic surgeries. We enrolled 166 patients after propensity score matching, the PCA alone (PCA group, n = 83) and the combination of PCA and CWA (PCA-CWA group, n = 83), through a review of electronic medical records. The primary endpoint was the numeric rating scale (NRS) at postoperative days 1, 2, 3, 4, and 5. The secondary endpoint was the presence of PSPS at 3 and 6 months postoperatively. The NRS were lower in the PCA-CWA group than in the PCA group throughout the postoperative period (p < 0.001). The sedation incidence was lower in the PCA-CWA group (1.2%) than in the PCA group (9.6%) (p = 0.034), and there was no significant difference in other postoperative complications or in the incidence of PSPS (p = 1.000). The combination of intravenous PCA and CWA is an effective postoperative analgesic modality for thoracic surgery.

Updates on Wound Infiltration Use for Postoperative Pain Management: A Narrative Review

Local anesthetic wound infiltration (WI) provides anesthesia for minor surgical procedures and improves postoperative analgesia as part of multimodal analgesia after general or regional anesthesia. Although pre-incisional block is preferable, in practice WI is usually done at the end of surgery. WI performed as a continuous modality reduces analgesics, prolongs the duration of analgesia, and enhances the patient’s mobilization in some cases. WI benefits are documented in open abdominal surgeries (Caesarean section, colorectal surgery, abdominal hysterectomy, herniorrhaphy), laparoscopic cholecystectomy, oncological breast surgeries, laminectomy, hallux valgus surgery, and radical prostatectomy. Surgical site infiltration requires knowledge of anatomy and the pain origin for a procedure, systematic extensive infiltration of local anesthetic in various tissue planes under direct visualization before wound closure or subcutaneously along the incision. Because the incidence of local anesthetic systemic toxicity is 11% after subcutaneous WI, appropriate local anesthetic dosing is crucial. The risk of wound infection is related to the infection incidence after each particular surgery. For WI to fully meet patient and physician expectations, mastery of the technique, patient education, appropriate local anesthetic dosing and management of the surgical wound with “aseptic, non-touch” technique are needed.

Postoperative Pain Relief after Pancreatic Resection: Systematic Review and Meta-Analysis of Analgesic Modalities

Background

This systematic review explored the efficacy of different pain relief modalities used in the management of postoperative pain following pancreatoduodenectomy (PD) and distal pancreatectomy (DP) and impact on perioperative outcomes.

Methods

MEDLINE (OVID), Embase, Pubmed, Web of Science and CENTRAL databases were searched using PRISMA framework. Primary outcomes included pain on postoperative day 2 and 4 and respiratory morbidity. Secondary outcomes included operation time, bile leak, delayed gastric emptying, postoperative pancreatic fistula, length of stay, and opioid use.

Results

Five randomized controlled trials and seven retrospective cohort studies (1313 patients) were included in the systematic review. Studies compared epidural analgesia (EDA) (n = 845), patient controlled analgesia (PCA) (n = 425) and transabdominal wound catheters (TAWC) (n = 43). EDA versus PCA following PD was compared in eight studies (1004 patients) in the quantitative meta-analysis. Pain scores on day 2 (p = 0.19) and 4 (p = 0.18) and respiratory morbidity (p = 0.42) were comparable between EDA and PCA. Operative times, bile leak, delayed gastric emptying, pancreatic fistula, opioid use, and length of stay also were comparable between EDA and PCA. Pain scores and perioperative outcomes were comparable between EDA and PCA following DP and EDA and TAWC following PD.

Conclusions

EDA, PCA and TAWC are the most frequently used analgesic modalities in pancreatic surgery. Pain relief and other perioperative outcomes are comparable between them. Further larger randomized controlled trials are warranted to explore the relative merits of each analgesic modality on postoperative outcomes with emphasis on postoperative complications.

Supplementary Information

The online version contains supplementary material available at 10.1007/s00268-021-06217-x.

Comparison of multimodal analgesia with thoracic epidural after transthoracic oesophagectomy

BACKGROUND

Thoracic epidural analgesia (TEA) has been regarded as the standard of care after oesophagectomy for pain control, but has several side-effects. Multimodal (intrathecal diamorphine, paravertebral and rectus sheath catheters) analgesia (MA) may facilitate postoperative mobilization by reducing hypotensive episodes and the need for vasopressors, but uncertainty exists about whether it provides comparable analgesia. This study aimed to determine whether MA provides comparable analgesia to TEA following transthoracic oesophagectomy.

METHODS

Consecutive patients undergoing oesophagectomy for cancer between January 2015 and December 2018 were grouped according to postoperative analgesia regimen. Propensity score matching (PSM) was used to account for treatment selection bias. Pain scores at rest and on movement, graded from 0 to 10, were used. The incidence of hypotensive episodes and the requirement for vasopressors were evaluated.

RESULTS

The study included 293 patients; 142 (48.5 per cent) received TEA and 151 (51.5 per cent) MA. After PSM, 100 patients remained in each group. Mean pain scores were significantly higher at rest in the MA group (day 1: 1.5 versus 0.8 in the TEA group, P = 0.017; day 2: 1.7 versus 0.9 respectively, P = 0.014; day 3: 1.2 versus 0.6, P = 0.047). Fewer patients receiving MA had a hypotensive episode (25 per cent versus 45 per cent in the TEA group; P = 0.003) and fewer required vasopressors (36 versus 53 per cent respectively; P = 0.016). There was no significant difference in the overall complication rate (71.0 versus 61.0 per cent; P = 0.136).

CONCLUSION

MA is less effective than TEA at controlling pain, but this difference may not be clinically significant. However, fewer patients experienced hypotension or required vasopressor support with MA; this may be beneficial within an enhanced recovery programme.

Effectiveness of Pain Control of Local Anaesthetic Wound Infusion Following Elective Midline Laparotomy: A Randomized Trial

BACKGROUND

Post-operative pain control is an important pillar in enhanced recovery after surgery. There is a paucity of data that compares efficacy of pain control between continuous local anaesthetic wound infusion and thoracic epidural analgesia in elective midline laparotomy patients OBJECTIVE: To evaluate pain control between continuous local anaesthetic wound infusion and thoracic epidural analgesia in elective laparotomy patients.

DESIGN

A randomized, single-blind, controlled clinical trial.

SETTING

Aga Khan University Hospital, Nairobi, Kenya.

POPULATION

Patients underwent elective laparotomy.

METHODS

Thirty-eight patients scheduled for elective laparotomy were randomized into two equal groups to receive either continuous local anaesthetic wound infusion or thoracic epidural analgesia. Data on the baseline patient characteristics, total morphine consumption at 72 h, visual analogue scores and rates of adverse effects were collected.

RESULTS

Baseline characteristics of the participants were similar. Continuous local anaesthetic wound infusion was equivalent to thoracic epidural analgesia in terms of pain scores and total morphine consumption at 72 h. Duration of hospital stay was shorter in the intervention arm. There were more surgical site infections in the intervention arm, while catheter dislodgement rate was higher in the thoracic epidural arm.

CONCLUSION

Continuous local anaesthetic wound infusion is equivalent to thoracic epidural analgesia in management of post-operative pain following elective midline laparotomy.

CLINICAL TRIAL REGISTRATION

Pan African Clinical Trial registry, number PACTR201808607220790.

Bupivacaine infiltration for acute postoperative pain management after cardiac surgery

BACKGROUND

Despite increased attention, acute and persistent post-operative pain are not treated efficiently and interventions against acute pain are therefore of clinical importance and should be welcomed.

AIMS AND OBJECTIVES

To evaluate the effectiveness of wound infiltration with 0.5% bupivacaine for pain management in the immediate post-operative period in patients that underwent cardiac surgery with sternotomy.

DESIGN

The study was performed employing a single-centre nonrandomized experimental design to evaluate a prospective cohort of patients recruited from June to December of 2017.

METHODS

A single-centre study with a non-randomized experimental design compared the pain perceived by 137 patients undergoing to cardiac surgery within which 68 patients who received infiltration of bupivacaine and 69 patients received infiltration with saline solution. Pain measures were made with the numeric rating scale (NRS) at 2, 12, 24, and 48 hours. Socio-demographic and clinical variables were included too and descriptive, bivariate, and multivariate logistic regression analyses were performed.

RESULTS

A statistically significant difference was found between the means of the NRS scores in favour of the intervention group. Cohen's d showed a significant effect size. NRS scores were grouped into NRS ≥4 or NRS <4 and similar results were found. Multivariate logistic regression analyses showed the absence of confounding factors that could call results into question.

CONCLUSION

Subcutaneous infiltration of 0.5% bupivacaine in the surgical site of patients who have undergone cardiac surgery showed clinically and statistically significant pain relief compared with patients who received saline infiltration throughout the first 12 hours after surgery. This intervention provides promising preliminary results that, alone or in conjunction with other nursing interventions, could constitute an important therapeutic tool for this area of nursing clinical practice.

Continuous local bupivacaine wound infusion reduces oral opioid use for acute postoperative pain control following myelomeningocele repair

BACKGROUND

For pregnancies complicated by fetal myelomeningocele who meet the established criteria, prenatal closure is a viable management option. Prenatal closure is an open procedure, with some techniques requiring greater dissection of maternal tissue than cesarean delivery; pain control is an important postoperative goal. Given the rising rates of opioid dependence and concerns regarding the fetal and neonatal effects of opioid use, our practice has turned to nonopioid pain management techniques.

OBJECTIVE

This study aimed to compare postoperative opioid use and pain scores in women undergoing open fetal myelomeningocele repair with and without continuous local bupivacaine wound infusion.

STUDY DESIGN

This was a retrospective, single-center chart review of all consecutive patients who underwent open myelomeningocele repair from March 2013 to December 2019. Women were enrolled at the time of referral and locally followed for 2 weeks postoperatively. The control group received patient-controlled epidural analgesia for 48 hours with acetaminophen and oral and intravenous opioids as needed. The treatment group received patient-controlled epidural analgesia for 24 hours with acetaminophen, oral and intravenous opioids, and continuous local bupivacaine infusion. Pain scores, medication use, and postoperative milestones and complications through discharge were abstracted from the chart and compared.

RESULTS

Of 72 subjects, 51 were in the control group and 21 in the treatment group. Total opioid use, including intravenous doses (165 vs 52.5 mg; P=.001) and daily average oral opioid use (30 vs 10.5 mg; P=.002) were lower in the treatment group. In addition, 24% of women in the treatment group used no opioid postoperatively, compared with 4% in the control group. There was no difference in postoperative day 1 to 4 pain scores, antiemetic use, or bowel function; the treatment group was discharged significantly earlier.

CONCLUSION

Postoperative opioid use was reduced in women who received continuous local wound infusion of bupivacaine for incisional pain control after prenatal myelomeningocele repair. Pain control is paramount following open myelomeningocele repair; local bupivacaine wound infusion is an important adjunct to reduce opioid use postoperatively.

Epidural analgesia for postoperative pain: Improving outcomes or adding risks?

Current evidence shows that the benefits of epidural analgesia (EA) are not as impressive as believed in the past, while the risks of adverse effects and serious complications are greater than previously estimated. There are many reasons for the decreasing role of epidural technique in clinical practice (table). Indeed, EA can cause harm and hinder early mobilization in enhanced recovery after surgery (ERAS) programmes. Some ERAS interventions are complex, confusing, sometimes contradictory and apparently unimplementable. In spite of much hype and after almost 25 years, the originator of the concept has described the current status of ERAS as 'far from good'. Outpatient surgery setup has been a remarkable success for many major surgical procedures, and it predates ERAS and appears to be a simpler and better model for reducing postoperative morbidity and hospitalization times. Systematic reviews of comparative studies have shown that less invasive and safer but equally effective alternatives to EA are available for almost all major surgical procedures. These include: paravertebral block, peripheral nerve blocks, catheter wound infusion, periarticular local infiltration analgesia, preperitoneal catheters and transversus abdominis plane block. Increasingly, these non-EA methods are being used as surgeon-delivered regional analgesia (RA) techniques. This encouraging trend of active surgeon participation, with anaesthesiologist collaboration, will undoubtedly improve the decades-old twin problems of underused RA techniques and undertreated postoperative pain. The continued use of EA at any institution can only be justified by results from its own audits; however, regrettably only very few institutions perform such regular audits.

Epidural Versus Transabdominal Wall Catheters: A Comparative Study of Outcomes After Pancreatic Resection

BACKGROUND

This study compared epidural analgesia with local anesthetic administration via transabdominal wall catheters (TAWC), to determine the effect on perioperative outcomes in pancreatic surgery.

MATERIALS AND METHODS

A retrospective review of patients undergoing open pancreatic surgery at Auckland City Hospital from 2015 to 2018 was undertaken. Data collected included patient demographics, type of perioperative analgesia, intravenous fluid and vasopressor use, length of high dependency unit stay, postoperative complications, and length of hospital stay.

RESULTS

Seventy-two patients underwent pancreatic surgery, of which 47 had epidural analgesia and 25 TAWC. The median age was 64 y (range 29-85). Failure of analgesia method occurred in 45% of epidural patients and 28% of TAWC patients (P = 0.209). There was no significant difference in volume of intravenous fluid given or need for vasopressors in the first 3 postoperative days, length of high dependency unit stay (median 1 d, P = 0.2836), rates of postoperative pancreatic fistula (32% versus 40%, P = 0.6046), postoperative complications (38% versus 20%, P = 0.183), or mortality (0.04% versus 0.04%, P = 1.0).

CONCLUSIONS

Epidural analgesia and TAWC may have comparable perioperative outcomes in patients undergoing pancreatic surgery. Further randomized studies with a larger cohort of patients are warranted to identify the best postoperative analgesic method in patients undergoing pancreatic resection.

Continuous peripheral nerve blocks compared to thoracic epidurals or multimodal analgesia for midline laparotomy: a systematic review and meta-analysis

BACKGROUND

Continuous peripheral nerve blocks (CPNBs) have been investigated to control pain for abdominal surgery via midline laparotomy while avoiding the adverse events of opioid or epidural analgesia. The review compiles the evidence comparing CPNBs to multimodal and epidural analgesia.

METHODS

We conducted a systematic review using broad search terms in MEDLINE, EMBASE, Cochrane. Primary outcomes were pain scores and cumulative opioid consumption at 48 hours. Secondary outcomes were length of stay and postoperative nausea and vomiting (PONV). We rated the quality of the evidence using Cochrane and GRADE recommendations. The results were synthesized by meta-analysis using Revman.

RESULTS

Our final selection included 26 studies (1,646 patients). There was no statistically significant difference in pain control comparing CPNBs to either multimodal or epidural analgesia (low quality evidence). Less opioids were consumed when receiving epidural analgesia than CPNBs (mean difference [MD]: -16.13, 95% CI [-32.36, 0.10]), low quality evidence) and less when receiving CPNBs than multimodal analgesia (MD: -31.52, 95% CI [-42.81, -20.22], low quality evidence). The length of hospital stay was shorter when receiving epidural analgesia than CPNBs (MD: -0.78 days, 95% CI [-1.29, -0.27], low quality evidence) and shorter when receiving CPNBs than multimodal analgesia (MD: -1.41 days, 95% CI [-2.45, -0.36], low quality evidence). There was no statistically significant difference in PONV comparing CPNBs to multimodal (high quality evidence) or epidural analgesia (moderate quality evidence).

CONCLUSIONS

CPNBs should be considered a viable alternative to epidural analgesia when contraindications to epidural placement exist for patients undergoing midline laparotomies.

Adjuncts to local anesthetic wound infiltration for postoperative analgesia: a systematic review

Local anesthetics (LAs) are commonly infiltrated into surgical wounds for postsurgical analgesia. While many adjuncts to LA agents have been studied, it is unclear which adjuncts are most effective for co-infiltration to improve and prolong analgesia. We performed a systematic review on adjuncts (excluding epinephrine) to local infiltrative anesthesia to determine their analgesic efficacy and opioid-sparing properties. Multiple databases were searched up to December 2019 for randomized controlled trials (RCTs) and two reviewers independently performed title/abstract screening and full-text review. Inclusion criteria were (1) adult surgical patients and (2) adjunct and LA agents infiltration into the surgical wound or subcutaneous tissue for postoperative analgesia. To focus on wound infiltration, studies on intra-articular, peri-tonsillar, or fascial plane infiltration were excluded. The primary outcome was reduction in postoperative opioid requirement. Secondary outcomes were time-to-first analgesic use, postoperative pain score, and any reported adverse effects. We screened 6670 citations, reviewed 126 full-text articles, and included 89 RCTs. Adjuncts included opioids, non-steroidal anti-inflammatory drugs, steroids, alpha-2 agonists, ketamine, magnesium, neosaxitoxin, and methylene blue. Alpha-2 agonists have the most evidence to support their use as adjuncts to LA infiltration. Fentanyl, ketorolac, dexamethasone, magnesium and several other agents show potential as adjuncts but require more evidence. Most studies support the safety of these agents. Our findings suggest benefits of several adjuncts to local infiltrative anesthesia for postoperative analgesia. Further well-powered RCTs are needed to compare various infiltration regimens and agents.

Protocol registration

PROSPERO (CRD42018103851) (https://www.crd.york.ac.uk/prospero/display_record.php?RecordID=103851)

Continuous wound infiltration versus epidural analgesia for midline abdominal incisions - a randomized-controlled pilot trial (Painless-Pilot trial; DRKS Number: DRKS00008023)

OBJECTIVES

To test the feasibility of a randomized controlled study design comparing epidural analgesia (EDA) with continuous wound infiltration (CWI) in respect to postoperative complications and mobility to design a future multicentre randomized controlled trial.

DESIGN, SETTING, PARTICIPANTS

CWI has been developed to address drawbacks of EDA. Previous studies have established the equivalent analgesic potential of CWI compared to EDA. This is a single centre, non-blinded pilot randomized controlled trial at a tertiary surgical centre. Patients undergoing elective non-colorectal surgery via a midline laparotomy were randomized to EDA or CWI. Endpoints included recruitment, feasibility of assessing postoperative mobility with a pedometer and morbidity. No primary endpoint was defined and all analyses were explorative.

INTERVENTIONS

CWI with local anaesthetics (experimental group) vs. thoracic EDA (control).

RESULTS

Of 846 patients screened within 14 months, 71 were randomized and 62 (31 per group) included in the intention-to-treat analysis. Mobility was assessed in 44 of 62 patients and revealed no differences within the first 3 postoperative days. Overall morbidity did not differ between the two groups (measured via the comprehensive complication index). Median pain scores at rest were comparable between the two groups, while EDA was superior in pain treatment during movement on the first, but not on the second and third postoperative day. Duration of preoperative induction of anaesthesia was shorter with CWI than with EDA. Of 17 serious adverse events, 3 were potentially related to EDA, while none was related to CWI.

CONCLUSION

This trial confirmed the feasibility of a randomized trial design to compare CWI and EDA regarding morbidity. Improvements in the education and training of team members are necessary to improve recruitment.

TRIAL REGISTRATION

DRKS00008023.

Strategies of analgesic treatment after cesarean delivery. Current state and new alternatives

The number of caesarean sections performed worldwide is increasing, and with it, the need for the optimal analgesia strategies. Deficient postoperative analgesia increases the need for opioids, delays recovery, and is associated with chronic pain and postpartum depression. It is essential to find good postoperative pain control strategies that facilitate early mobility, early recovery, and early hospital discharge with minimal side effects on the mother and infant. Multimodal analgesia based on neuroaxial anaesthesia with morphine in combination with non-opioids such as non-steroidal anti-inflammatory drugs and paracetamol, gives the best post-caesarean analgesia outcome, and allows anaesthesiologists to reserve opioids, corticoids, gabapentin, magnesium or ketamine for situations where neuroaxial anaesthesia cannot be performed, for high-risk patients, or when pain is difficult to control. Peripheral nerve block techniques can also be added, such as transverse abdominis plane block, erector spinae block, or continuous wound infiltration.

Continuous Wound Infiltration of Local Anesthetics in Postoperative Pain Management: Safety, Efficacy and Current Perspectives

Local infiltration and continuous infusion of surgical wound with anesthetics are parts of multimodal analgesia for postoperative pain control. The techniques, given the simplicity of execution that does not increase the timing of the intervention and does not require additional technical skills, are applied in several kinds of surgeries. The continuous wound infiltration can be used for days and a variety of continuous delivery methods can be chosen, including patient-controlled analgesia, continuous infusion or intermittent bolus. The purpose of this narrative review is to analyze the literature, in particular by researching the safety, efficacy and current perspectives of continuous wound infiltration for postoperative pain management in different surgical settings. We have identified 203 articles and 95 of these have been taken into consideration: 17 for the lower limb surgery; 7 for the upper limb surgery, 51 for the laparotomy/laparoscopic surgery of the abdominopelvic area, 13 studies regarding breast surgery and 7 for cardiothoracic surgery. The analysis of these studies reveals that the technique has a variable effectiveness based on the type of structure involved: it is better in structures rich in subcutaneous and connective tissue, while the effectiveness is limited in anatomic districts with a greater variability of innervation. However, regardless the heterogeneity of results, a general reduction in pain intensity and in opioid consumption has been observed with continuous wound infiltration: it is an excellent analgesic technique that can be included in the multimodal treatment of postoperative pain or represents a valid alternative when other options are contraindicated.

Comparison of Continuous Wound Infusion versus Continuous Epidural Infusion in Upper Abdominal Surgery: Noninferiority Randomized Controlled Trial

Context:

Wound catheter offers a less invasive alternative for postoperative analgesia in the abdominal surgery.

Methods:

We conducted a single-center, prospective, open-label noninferiority randomized controlled trial. A total of 40 patients who consented to this trial, undergoing upper abdominal surgery via an upper midline incision, were randomized into two groups. In the continuous wound infusion (CWI) group, the wound catheter was placed in the subcutaneous plane of the surgical incision; the continuous epidural infusion (CEI) group received thoracic epidural with a catheter placed. After the surgery, both the groups received 0.2% ropivacaine infusion at 10 mL/h following a 10 mL bolus for 48 h postsurgery. Postoperatively, the pain scores were noted at multiple time points, along with a record of morphine consumption and adverse effects.

Results:

There was no significant difference in pain scores both at rest and on movement between the two groups at all the time points assessed. The mean difference in numerical rating scale score 24 h postsurgery at rest (0.1, 95% confidence interval [CI] = −0.45, 0.65) and on movement (0.05, 95% CI = −0.73, 0.83), with 95% CI in both the groups, was within the noninferiority limit. Morphine consumption was less in the CEI group, though not significant. The time to appearance of bowel movement, time to ambulate, and length of hospital stay were significantly lower in the CWI group. The incidence of hypotension requiring intervention was higher in the CEI group.

Conclusion:

Hence, analgesia provided by continuous wound catheter infusion is not inferior to CEI with better preservation of hemodynamics and faster recovery.

A Randomized Controlled Trial Comparing Epidural Analgesia Versus Continuous Local Anesthetic Infiltration Via Abdominal Wound Catheter in Open Liver Resection

AIM

To compare outcomes following open liver resection (OLR) between patients receiving thoracic epidural (EP) versus abdominal wound catheters plus patient-controlled analgesia (AWC-PCA).

METHOD

Patients were randomized 1:1 to either EP or AWC-PCA within an enhanced recovery protocol. Primary outcome was length of stay (LOS), other variables included functional recovery, pain scores, peak flow, vasopressor and fluid requirements, and postoperative complications.

RESULTS

Between April 2015 and November 2017, 83 patients were randomized to EP (n = 41) or AWC-PCA (n = 42). Baseline demographics were comparable. No difference was noted in LOS (EP 6 d (3-27) vs AWC-PCA 6 d (3-66), P = 0.886). Treatment failure was 20% in the EP group versus 7% in the AWC-PCA (P = 0.09). Preoperative anesthetic time was shorter in the AWC-PCA group, 49 minutes versus 62 minutes (P = 0.003). EP patients required more vasopressor support immediately postoperatively on day 0 (14% vs 54%, P = <0.001) and day 1 (5% vs 23%, P = 0.021). Pain scores were greater on day 0, afternoon of day 1 and morning of day 2 in the AWC-PCA group however were regarded as low at all time points. No other significant differences were noted in IV fluid requirements, nausea/sedation scores, days to open bowels, length of HDU, and postoperative complications.

CONCLUSION

AWC-PCA was associated with reduced treatment failure and a reduced vasopressor requirement than EP up to 2 days postoperatively. While the use of AWC-PCA did not translate into a shorter LOS in this study, it simplified patient management after OLR. EP cannot be routinely recommended following open liver resections.

A review of peripheral nerve blocks for cesarean delivery analgesia

Peripheral nerve blocks have a unique role in postcesarean delivery multimodal analgesia regimens. In this review article, options for peripheral nerve blocks for cesarean delivery analgesia will be reviewed, specifically paravertebral, transversus abdominis plane, quadratus lumborum, iliohypogastric and ilioinguinal, erector spinae, and continuous wound infiltration blocks. Anatomy, existing literature evidence, and specific areas in need of future research will be assessed. Considerations for local anesthetic toxicity, and for informed consent for these modalities in the context of emergency cesarean deliveries, will be presented.

Subpleural multilevel intercostal continuous analgesia after thoracoscopic pulmonary resection: a pilot study

BACKGROUND

Sufficient pain control and rapid mobilisation after VATS are important to enhance recovery and prevent complications. Thoracic epidural analgesia (TEA) is the gold standard, but failure rates of 9-30% have been described. In addition, TEA reduces patient mobilisation and bladder function. Subpleural continuous analgesia (SCA) is a regional analgesic technique that is placed under direct thoracoscopic vision and is not associated with the mentioned disadvantages of TEA. The objective of this study was to assess surgical feasibility, pain control and patient satisfaction of SCA.

METHODS

Observational pilot study in patients who underwent VATS pulmonary resection and received SCA (n = 23). Pain scores (numeric rating scale 0-10) and patient satisfaction (5-point Likert scale) were collected on postoperative day (POD) 0-3. Secondary outcomes were the period of urinary catheter use and period to full mobilisation.

RESULTS

Placement of the subpleural catheter took an average of 11 min (SD 5) and was successful in all patients. Pain scores on POD 0-3 were 1.2 (SD 1.2), 2.0 (SD 1.9), 1.7 (SD 1.5) and 1.2 (SD 1.1) respectively. On POD 0-3 at least 79% of patients were satisfied or very satisfied on pain relief and mobilisation. The duration of subpleural continuous analgesia was 4 days (IQR 3-5, range 2-11). Urinary catheters were used zero days (IQR 0-1, range 0-6) and full mobilisation was achieved on POD 2 (IQR 1-2, range 1-6).

CONCLUSION

Subpleural continuous analgesia in VATS pulmonary resection is feasible and provides adequate pain control and good patient satisfaction.

TRIAL REGISTRATION

This pilot study was not registered in a trial register.

Local anaesthetic infiltration via wound catheter versus epidural analgesia in open hepatectomy: a systematic review and meta-analysis of randomised controlled trials

BACKGROUND

Although epidural analgesia (EA) provides effective pain control after open hepatectomy, postoperative hypotension is a common problem that limits ambulation. There is growing interest in alternative methods of pain control after open abdominal surgery, including a potential role for local anaesthetic infusion via wound catheter (WC). The aim of this study was to evaluate the available evidence for WC in open hepatectomy by conducting a meta-analysis of randomised trials.

METHODS

A systematic database search of literature published in the last 20 years was performed. Only randomised controlled trials (RCTs) were included in the study. Meta-analyses were performed using both fixed-effects and random-effects models.

RESULTS

WC patients had significantly faster functional recovery (WMD = -0.73 (-1.13, -0.32), I² = 0%, p = 0.004). There was no significant difference in pain scores on the first postoperative day (POD1). On POD2, WC patients had higher pain scores compared to EA patients (WMD = 0.29 (0.09, 0.49), I² = 0%, p < 0.004), but this corresponded with significantly lower opioid consumption in WC patients (WMD = -6.29 (-7.92, -4.65), I² = 62%, p < 0.001). There was no significant difference in major hepatectomy, incision length, complications, length of hospital stay or readmissions between groups.

CONCLUSION

Despite higher pain scores on the second postoperative day, functional recovery after open hepatectomy is faster in patients with wound catheters compared with epidural analgesia. Wound catheters should be considered the preferred mode of analgesia after open hepatectomy.

Regional analgesia modalities in abdominal and lower limb surgery - comparison of efficacy

A significant component of all surgical procedures and postoperative treatment is pain management.Due to the physiological and psychological advantages of pain relief, it is one of the foremost indicators of quality of care. Today, there are various modalities of pain reduction, aimed to reduce patient discomfort andminimize side effects, which can be divided by therapeutic agents used (opioid or non-opioid), route of administration (intravenous, regional, oral, etc.) and modality (controlled by patients or "as needed"). Although opioids have proven to be very effective pain relief agents and are commonly used in postoperative analgesia, concerns about their side effects have spurred the development of modified, multimodal treatments that seek to minimize opioid use and associated drawbacks. Enhanced recovery protocols that emphasize sparing administration of opioids are growing in importance, andresulting in reduced length of hospital stay after abdominal and lower limb surgery. To further improve such protocols and optimize postoperative care for individual patient needs, it is imperative to fully assess the efficacy of available drugs and analgesia modalities.

Peripartum Anesthesia Considerations for Placenta Accreta

Placenta accreta spectrum is becoming more common and is the most frequent indication for peripartum hysterectomy. Management of cesarean delivery in the setting of a morbidly adherent placenta has potential for massive hemorrhage, coagulopathies, and other morbidities. Anesthetic management of placenta accreta spectrum presents many challenges including optimizing surgical conditions, providing a safe and satisfying maternal delivery experience, preparing for massive hemorrhage and transfusion, preventing coagulopathies, and optimizing postoperative pain control. Balancing these challenging goals requires meticulous preparation with a thorough preoperative evaluation of the parturient and a well-coordinated multidisciplinary approach in order to optimize outcomes for the mother and fetus.

Efficacy of Ultrasound-Guided Serratus Plane Block on Postoperative Quality of Recovery and Analgesia After Video-Assisted Thoracic Surgery: A Randomized, Triple-Blind, Placebo-Controlled Study

BACKGROUND

The optimal regional technique for analgesia and improved quality of recovery after video-assisted thoracic surgery (a procedure associated with considerable postoperative pain) has not been established. The main objective in this study was to compare quality of recovery in patients undergoing serratus plane block (SPB) with either ropivacaine or normal saline on the first postoperative day. Secondary outcomes were analgesic outcomes, including postoperative pain intensity and opioid consumption.

METHODS

Ninety patients undergoing video-assisted thoracic surgery were randomized to receive ultrasound-guided SPB with 0.4 mL/kg of either 0.375% ropivacaine (SPB group) or normal saline (control group) after anesthetic induction. The primary outcome was the 40-item Quality of Recovery (QoR-40) score at 24 hours after surgery. The QoR-40 questionnaire was completed by patients the day before surgery and on postoperative days 1 and 2. Pain scores, opioid consumption, and adverse events were assessed for 2 days postoperatively.

RESULTS

Eighty-five patients completed the study: 42 in the SPB group and 43 in the control group. The global QoR-40 scores on both postoperative days 1 and 2 were significantly higher in the SPB group than in the control group (estimated mean difference 8.5, 97.5% confidence interval [CI], 2.1-15.0, and P = .003; 8.5, 97.5% CI, 2.0-15.1, and P = .004, respectively). The overall mean difference between the SPB and control groups was 8.5 (95% CI, 3.3-13.8; P = .002). Pain scores at rest and opioid consumption were significantly lower up to 6 hours after surgery in the SPB group than in the control group. Cumulative opioid consumption was significantly lower up to 24 hours postoperatively in the SPB group.

CONCLUSIONS

Single-injection SPB with ropivacaine enhanced the quality of recovery for 2 days postoperatively and improved postoperative analgesia during the early postoperative period in patients undergoing video-assisted thoracic surgery.

Patient-controlled Intravenous Analgesia With Combination of Dexmedetomidine and Sufentanil on Patients After Abdominal Operation: A Prospective, Randomized, Controlled, Blinded, Multicenter Clinical Study

Objective:

To investigate the effect of combination of dexmedetomidine and sufentanil on patient-controlled intravenous analgesia (PCIA) in patients after abdominal operation and to assess the safety and validity of this treatment.

Methods:

This is a prospective, randomized controlled, blinded, multicenter clinical study. A total of 210 patients from 9 clinical research centers underwent selective abdominal operation with general anesthesia were enrolled in the study, including laparoscopic-assisted abdominal operation on stomach, intestines or open surgery on stomach, intestines, kidneys and liver, the American Society of Anesthesiologists status I to II. Patients were randomly assigned into 2 groups: control group (group C) sufentanil 100 μg+normal saline 100 mL in total and test group (group D) sufentanil 100 μg+ dexmedetomidine 200 μg+normal saline 100 mL in total. PCIA was set as follow: background infusion of sufentanil 2 μg/h, bolus dose of sufentanil 2 μg, lockout interval 5 minutes. Main measure indices were analgesic consumption, pressing times and effective pressing times of analgesic pump, usage count, and consumption of remedy drug. Validity indices were visual analog scale (VAS) scores and patient satisfaction. Drug safety indices were hemodynamic parameters, drug side effects, and anal exhaust time.

Results:

In total, 203 cases were analyzed. Seven cases were eliminated for incomplete data record. The total consumption of sufentanil (μg) in 24 hours after operation of group C and group D were 56.9±21.5 and 49.8±15.5, respectively, and the difference was statistically significant (P<0.05). Pressing times of analgesic pump in 24 hours after operation of group C and group D were 9.47±16.07 and 5.02±5.56 times, respectively, and the difference was statistically significant (P<0.05). Effective pressing times of analgesic pump in 24 hours after operation of group C and group D were 7.8±9.7 and 4.57±5.02 times, respectively, and the difference was statistically significant (P<0.05). Resting VAS scores and movement VAS scores at 2, 4, 8, and 24 hours postoperatively were statistically different (P<0.05). Usage times of rescue drug (pethidine) of group C and group D were 9 and 1, mean rank 118.13 and 85.71, respectively, and the difference was statistically significant (P<0.05). Mean rank of general satisfaction of group C and group D were 98.99 and 105.04, respectively, and the difference was statistically significant (P<0.05). Incidence rate of nausea in group C and group D within 24 hours after surgery was 25% and 12.5%, and of vomiting 18.2% and 6.25%, respectively and of vomiting and the difference was statistically significant.

Conclusions:

Compared with sufentanil PCIA alone, the combination of dexmedetomidine and sufentanil for PCIA after abdominal operation could reduce sufentanil consumption, decrease VAS scores, lower the rate of nausea and vomiting, and improve patient satisfaction.

Prevention and Treatment of Chronic Postsurgical Pain: A Narrative Review

Chronic postsurgical pain affects between 5 and 75% of patients, often with an adverse impact on quality of life. While the transition of acute to chronic pain is a complex process-involving multiple mechanisms at different levels-the current strategies for prevention have primarily been restricted to perioperative pharmacological interventions. In the present paper, we first present an up-to-date narrative literature review of these interventions. In the second section, we develop several ways by which we could overcome the limitations of the current approaches and enhance the outcome of our surgical patients, including the better identification of individual risk factors, tailoring treatment to individual patients, and improved acute and subacute pain evaluation and management. The third and final section covers the treatment of established CPSP. Given that evidence for the current therapeutic options is limited, we need high-quality trials studying multimodal interventions matched to pain characteristics.

Postoperative pain management in patients undergoing posterior spinal fusion for adolescent idiopathic scoliosis: a narrative review

Posterior spinal fusion for adolescent idiopathic scoliosis is one of the most invasive surgical procedures performed in children and adolescents. Because of the extensive surgical incision and massive tissue trauma, posterior spinal fusion causes severe postoperative pain. Intravenous patient-controlled analgesia with opioids has been the mainstay of postoperative pain management in these patients. However, the use of systemic opioids is sometimes limited by opioid-related side effects, resulting in poor analgesia. To improve pain management while reducing opioid consumption and opioid-related complications, concurrent use of analgesics and analgesic modalities with different mechanisms of action seems to be rational. The efficacy of intrathecal opioids and nonsteroidal anti-inflammatory drugs as components of multimodal analgesia in scoliosis surgery has been well established. However, there is either controversy or insufficient evidence regarding the use of other analgesic methods, such as continuous ketamine infusion, perioperative oral gabapentin, acetaminophen, continuous wound infiltration of local anesthetics, a single dose of systemic dexamethasone, and lidocaine infusion in this patient population. Moreover, appropriate combinations of analgesics have not been established. The aim of this literature review is to provide detailed information of each analgesic technique so that clinicians can make appropriate choices regarding pain management in patients with adolescent idiopathic scoliosis undergoing posterior spinal fusion.

Comparison of the postoperative effect between epidural anesthesia and continuous wound infiltration on patients with open surgeries: A meta-analysis

PURPOSE

The study aimed to compare the effect of epidural anesthesia (EA) and continuous wound infiltration (CWI) on surgical patients.

METHODS

The literature retrieval was conducted in relevant databases from their inception to June 2018 with the predefined searching strategy and selection criteria. Then, the Cochrane Collaboration's tool was used to assess the quality of included studies. In addition, odds ratio (OR) and standardized mean difference (SMD) with its corresponding 95% confidence interval (CI) were used as a measure of effect size for evaluating outcomes indicators.

RESULTS

Totally, sixteen RCTs were included. The incidence of hypotension in EA group was significantly higher than CWI group (OR = 3.7398; 95% CI: 1.0632 to 13.1555). In addition, EA provided better pain relief than CWI on rest at 72 h (SMD = -0.6037; 95% CI: -1.0767 to -0.1308) after surgery. Additionally, there were no significant differences in pain score on rest and mobilization at 2 h, 12 h, 24 h and 48 h. Moreover, the subgroup analysis showed that pain scores in EA group was significantly reduced at 2 h on rest and 12 h on mobilization than CWI group after liver resection surgery, as well as at 72 h on rest after colorectal surgery.

CONCLUSION

CWI is superior to EA with a lower incidence of complications for use in surgery, and EA may provide better pain control than CWI on pain relief after surgery.