Transversus abdominis plane block

Regional Anesthetic Blocks in Plastic Surgery Using Portable Ultrasound: A Simplified Approach

BACKGROUND

With the introduction of latest generation ultrasound technology and its easy availability and portability, regional anesthetic blocks, which were formally in the domain of anesthesiologists, have now become available to practicing plastic surgeons. Enhanced Recovery After Surgery protocols for other specialties such as orthopedics and colorectal surgery have incorporated regional anesthetic blocks. These regional blocks have been shown to be effective in improving the patient comfort and experience and decreasing reliance on opioid medications.

METHODS

Patients scheduled for elective plastic surgery received PEC-1, serratus anterior plane, or transversus abdominis plane blocks as indicated for the proposed procedure. All blocks were performed under ultrasound guidance using the Philips Lumify system with the linear array 12-4 probe by the operating surgeon.

RESULTS

A total of 83 patients received regional anesthetic blocks by the senior author. Thirty-three patients undergoing cosmetic breast augmentation or implant-based breast reconstruction received the PEC-1 and the serratus anterior plane blocks after the induction of anesthesia but before the prep and drape. Fifty patients undergoing either abdominoplasty or deep inferior epigastric perforator flap reconstruction received intraoperative transversus abdominis plane blocks. Anatomic planes were clearly visualized with this new ultrasound technology. Patients experienced good to excellent analgesia with less reliance on opioid medications and decreased need for refills. For hospitalized patients, length of stay in some cases was decreased up to 1 day, and PCA pumps were eliminated. There were no complications or adverse sequelae observed in any of these patients related to the regional blocks.

CONCLUSIONS

Incorporation of these known regional anesthetic techniques in this single-surgeon experience seems to confirm reports of effectiveness in the anesthesia literature and may be of benefit to a wide range of plastic surgery patients.

Adding a transversus abdominis plane block to parenteral opioid for postoperative analgesia following trans-abdominal hysterectomy in a low resource setting: a prospective, randomised, double blind, controlled study

Background

The current gold standard treatment for acute postoperative pain after major abdominal surgery is multimodal analgesia using patient controlled analgesia delivery systems. Patient controlled analgesia systems are expensive and their routine use in very low income countries is not practical. The use of ultrasound in anaesthesia has made some regional anaesthesia blocks technically easy and safe to perform. This study aimed to determine whether adding an ultrasound guided transversus abdominis plane block as an adjunct to the current parenteral opioid based regimen would result in superior pain relief after a trans abdominal hysterectomy compared to using parenteral opioids alone.

Methods

Thirty-two elective patients having trans abdominal hysterectomy were recruited into a prospective randomised double-blind, controlled study comparing a bilateral transversus abdominis plane block using 21 ml of 0.25 % bupivacaine and 4.0 mg dexamethasone with a sham block containing 21 ml 0.9 % saline. Sixteen patients were allocated to each group. Anaesthesia and postoperative analgesia was left to the attending anaesthetist’s discretion. Primary outcome was visual analogue scale for pain at 2 h and 4 h. Secondary outcomes were time to first request for analgesia, visual analogue scale for comfort and bother. The data were analysed using the Statistical Package for Social Sciences (SPSS version 16).

Results

There was no statistically significant difference in the demographics of the two groups regarding weight, height, physical status and type of surgical incision. There was a statistically significant difference in visual analogue scale for pain at 4 h during movement with lower pain scales in the test group (p = 0.034). Women in the control group had an average pain free period of 56.8 min (median 56.5 min) before requesting a rescue analgesic compared to 116.5 min (median 103 min) in the study group. The between group difference in the average total analgesia duration was statistically significant at the 0.05 level (p = 0.005).

Conclusion

The addition of a bupivacaine–dexamethasone transverse abdominis plane block to intramuscular opioid does produce superior acute post-operative pain relief following a hysterectomy. However a single-shot block has a limited duration of action, and we recommend a repeat block.

Trial registration: Clinical trials registration was obtained PACTR201501000965252.http//www.pactr.org/ATMWeb/appmanager/atm/atmregistry?_nfpb=true&_windowLabel=BasicSearchUpdateController_1&BasicSearchUpdateController_1_actionOverride=%2Fpageflows%2Ftrial%2FbasicSearchUpdate%2FviewTrail&BasicSearchUpdateController_1id=965. The trial was registered on the 12th Dec 2014