Evaluation of AI-based nerve segmentation on ultrasound: relevance of standard metrics in the clinical setting.

Background: In artificial intelligence for ultrasound-guided regional anaesthesia, accurate nerve identification is essential. The technology community typically favours objective metrics of pixel overlap on still-frame images, whereas clinical assessments often use subjective evaluation of cine loops by physician experts. No clinically acceptable threshold of pixel overlap has been defined for nerve segmentation.

Posterior quadratus lumborum block versus intrathecal morphine analgesia after scheduled cesarean section: a prospective, randomized, controlled study.

Background: During the postoperative period of elective cesarean section, intrathecal morphine is effective in the multimodal analgesic regimen, but can cause significant adverse effects. Bilateral posterior quadratus lumborum block could be alternatively used. The aim of this study was to compare efficacy and safety of both strategies as part of a multimodal analgesic regimen.