Interscalene Nerve Block

Impedance can have an impact on nerve block during loco-regional anesthesia, particularly when using techniques such as nerve stimulation or ultrasound guidance to locate and block specific nerves. Impedance refers to the resistance to electrical current flow within tissue, and it can affect the ability to stimulate nerves or visualize them using ultrasound. The aim of this research is to assess the impedance across different tissue type during an axillary peripheral nerve block (skin, fat, fascia, muscle, nerve proximity). The results of this study would help clinicians performing nerve block to enhance the precision of needle placement, thus increase the success rate of nerve block and reduce adverse events such as intraneural or intravascular injections.

This prospective observational study evaluates the effect of the anesthesia method (general anesthesia versus regional anesthesia \[interscalene nerve block/superficial cervical block\] with sedation) on the operating clarity of the surgical view and the surgeon's satisfaction during elective shoulder arthroscopy. The study investigates how these different anesthesia techniques influence intraoperative conditions, specifically bleeding amounts and the visibility of the surgical field, which are critical for the success of this minimally invasive procedure. Additionally, the research will monitor patient-centered outcomes, including postoperative pain levels, recovery time, and potential side effects such as nausea or vomiting, to determine which anesthesia strategy provides the optimal balance of surgical efficiency and patient comfort.

This study is aims to compare between combined suprascapular and axillary nerve blocks versus interscalene nerve block regarding phrenic nerve affection assessed by ultrasound guided diaphragmatic excursion in shoulder arthroscopy surgeries.