Efficacy and safety of superior trunk block versus interscalene block for post-operative analgesia in shoulder surgeries

The interscalene brachial plexus block is the gold standard analgesic technique for surgery involving the shoulder and upper arm. However, due to its complications as hemidiaphragmatic paralysis, the superior trunk block was developed in an attempt to reduce major complications.The utility of the superior trunk block has yet to be studied in shoulder surgeries.

Inclusion Criteria:

• Patients American Society of Anaesthesiologists physical status (ASA) is I to II.
• Both genders.
• Aged group from 21 to 50 years old.
• Patients electively scheduled for shoulder surgery under general anesthesia with normal coagulation profile.

Exclusion Criteria:

• Refusal of the procedure or participation in the study.
• Any history or evidence of coagulopathy.
• Evidence of infection at injection site.
• Allergy to study drugs.
• Patients with pulmonary severe respiratory disease.
• Herniated cervical disc or cervical myelopathy.
• Pre-existing neuropathy of the operative limb