Stress response in shoulder surgery under interscalene block, randomized controlled study comparing ultrasound guidance to nerve stimulation

Comparison of ultrasound-guided and nerve stimulator-guided interscalene blocks as a sole anesthesia in shoulder arthroscopic rotator cuff repair: A retrospective study

Ultrasound-guided interscalene block (US-ISB) and nerve stimulator-guided interscalene block (NS-ISB) have both been commonly used for anesthesia in shoulder arthroscopic surgery.This study aims to compare which method provides surgical block as a sole anesthesia. In this retrospective study, 1158 patients who underwent shoulder arthroscopic rotator cuff tear repair surgery under ISB between October 2002 and March 2018 were classified into either the US-ISB or NS-ISB anesthesia groups. Demographic and anesthetic characteristics and intraoperative medications were analyzed after propensity score matching and compared between the 2 groups.There was a 0.5% rate of conversion to general anesthesia in the US-ISB group and a 6.7% rate in the NS-ISB group (P < .001). The volume of local anesthetics used for ISB was 29.7 ± 8.9 mL in the US-ISB group versus 38.1 ± 4.8 mL in the NS-ISB group (P < .001). The intraoperative use of analgesics and sedatives such as fentanyl, midazolam and propofol in combination was significantly lowered in the US-ISB group (P < .001).US-ISB is a more effective and safer approach for providing intense block to NS-ISB because it can decrease the incidence of conversion to general anesthesia and reduce the use of analgesics and sedatives during arthroscopic shoulder surgery.

Magnesium interscalene nerve block for the management of painful shoulder disorders

Shoulder pain is a common and distressing disorder. Systemic multimodal analgesia may be ineffective, but interscalene nerve block provides effective therapy. Magnesium may increase the efficacy and duration of systemic or regional analgesia. This case series examines the utility of magnesium interscalene nerve block for the management of painful shoulder disorders. Six elderly patients with shoulder pain and dysfunction received interscalene nerve block with injection of bupivacaine and magnesium. The patients subsequently reported significant improvement in sleep, shoulder pain, and physical function for 16 weeks. This report highlights that magnesium interscalene nerve block provides safe, effective, and prolonged shoulder analgesia.

The effect of ultrasound-guided transversus abdominis plane (TAP) block on postoperative analgesia and neuroendocrine stress response in pediatric patients undergoing elective open inguinal hernia repair

BACKGROUND

Transversus abdominis plane block (TAP) is a compartmental block of the anterior abdominal wall. Surgical trauma produces multisystem reactions. Anesthetic techniques can modify the neuroendocrine surgical stress response.

AIM

The aim of this study was to evaluate the effect of TAP block on the modification of the surgical neuroendocrine stress response as well as its analgesia effect in children undergoing open inguinal hernia repair.

METHOD

Sixty children aged 3-10 years undergoing elective unilateral open inguinal hernia repair were randomized into group I (general anesthesia) or group II (received TAP block after induction of general anesthesia). Serum cortisol, blood glucose, quality of analgesia, postoperative need for rescue analgesia, and complications and degree of satisfaction of the patients and their parents were assessed.

RESULTS

Serum cortisol level was significantly lower in group II as compared to group I intraoperatively (17.73 ± 1.51 vs 21.80 ± 2.22 μg·dl^-1 ) and 30 min postoperatively (15.03 ± 1.56 vs 18.30 ± 1.53 μg·dl^-1 ). Blood glucose level was significantly lower in group II as compared to group I intraoperatively (107.57 ± 3.77 vs 115.40 ± 6.30 mg·dl^-1 ) and 30 min postoperatively (104.13 ± 3.78 vs 110.73 ± 4.83 mg·dl^-1 ). The quality of analgesia as indicated by CHEOPS and OPS scales was significantly better in group II. The consumption of postoperative rescue analgesia was significantly higher in group I as compared to group II (27.00 ± 9.97 vs 13.00 ± 9.43 mg·kg^-1 ).

CONCLUSION

TAP block is effective as a part of multimodal analgesia for children undergoing open inguinal hernia repair with significant attenuation in the neuroendocrine stress response induced by surgery.