Nerves in quadratus lumborum planes: A cadaveric study.

Dermatomal analgesia achieved with quadratus lumborum blocks is site-dependent and inconsistent. Cadaveric and clinical studies reveal multiple mechanisms of action. We dissected six fresh human cadavers bilaterally and thoroughly studied their neurological linkages to the quadratus lumborum muscle (QLM) to identify neural structures and block targets.

Anatomic and radiological correlation of injectate spread from first thoracic costotransverse junction in cervical erector spinae plane.

Introduction: Cervical erector spinae plane block (ESPB) provides postoperative pain relief when administered at the level of first thoracic costotransverse junction (CTJ) for surgeries on the proximal shoulder and cervical spine. We propose to describe the spread of 20 ml radiocontrast - dye solution administered at this level from caudad to cephalad direction in a fresh frozen cadaveric model through imaging and cross-sections.

Methods: An observational study with four thoracic to cervical ESP blocks at the level of first thoracic CTJ level on two fresh cadavers (total 4 specimens) was conducted using 20 ml of radiocontrast- methylene blue combination (10 ml through the needle and 10 ml through the catheter).

Ultrasound guidance for the performance of sciatic and saphenous nerve blocks in dogs.

The aim of this study was to investigate the use of ultrasound (US) guidance to perform sciatic and saphenous nerve blocks in dogs. Five dogs were sedated with medetomidine and butorphanol. A high-resolution US transducer was used to locate the nerves, guide placement of the needle and visualise the perineural injection of lidocaine 2%.