Correlation of Vertebral Column Length and Abdominal Circumference with Subarachnoid Block Characteristics of Hyperbaric Ropivacaine for Infraumbilical Surgeries: A Single-arm Interventional Study. - BALA, MANJU; KUMAR, PRAVESH; CHHIKARA, MONICA; SEELWAL, DEEPIKA; GEHLAUT, PREETI (Journal of Clinical & Diagnostic Research, 2024)