The median effective concentration of ropivacaine for ultrasound-guided anterior iliopsoas muscle space block in the elderly undergoing hip surgery: a dose-finding study.

ABSTRACT:

Background

In order to improve perioperative pain and reduce the adverse outcome of severe pain in elderly hip fractures, anterior iliopsoas muscle space block (AIMSB) can be used clinically to reduce pain. The aim of the study is to investigate the 50% effective concentration (EC₅₀) of ropivacaine for ultrasound-guided anterior iliopsoas space block in elderly with hip fracture.

Methods

A total of 27 patients were enrolled with aged ≥65 years, American society of Anesthesiologists (ASA) physical status classification II-III and undergoing Total Hip Arthroplasty (THA). We measured the EC₅₀ using Dixon's up-and-down method. Ultrasound-guided AIMSB was performed preoperatively with an initial concentration of 0.2% in the first patient. After a successful

SUBMITTER: Ma P 

PROVIDER: S-EPMC11365473 | biostudies-literature | 2024

REPOSITORIES: biostudies-literature