This is a prospective observational study investigating the correlation between Perfusion Index (PI) ratio and End Diastolic Velocity (EDV) ratio as early predictors of successful supraclavicular brachial plexus block (SCBPB) in patients undergoing superficialization surgery of the upper limb.
Adults aged 18-65 years
Patient refusal
Participants are adult patients aged 18-65 years, both male and female, classified as ASA II-VI, and scheduled for elective superficialization procedures (mainly AV fistula superficialization). Patients must be capable of understanding and signing informed consent. Excluded are patients with contraindications to nerve block such as coagulopathy, local infection, allergy to local anesthetics, severe vascular disease, morbid obesity (BMI \>35), severe neurological or psychiatric impairment, or those taking vasopressors or beta-blockers that could alter vascular reactivity.
Cohort
Prospective
Not listed
Change in Perfusion Index ratio
Change in Perfusion Index ratio at 15 minutes after supraclavicular brachial plexus block in predicting successful block
Change in End Diastolic Velocity ratio
Change in End Diastolic Velocity ratio at 15 minutes after supraclavicular brachial plexus block in predicting successful block
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