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✅   The effect of passive leg raising on the cross-sectional area of the right internal jugular vein in obese patients undergoing surgery: a prospective observational study

Health

Objectives To observe the association between passive leg raising (PLR) and the cross-sectional area (CSA) of the right internal jugular vein (IJV) in obese patients undergoing elective surgery. Design Prospective observational study with randomised position sequence. Setting Single-centre, tertiary care hospital in Shanghai, China. Participants Forty obese patients (body mass index (BMI) >30 kg/m²) scheduled for elective surgery were enrolled. Inclusion criteria were American Society of Anesthesiologists Physical Status Classification (ASA) physical status II–III and age ≥18 years. Exclusion criteria included history of neck surgery, severe cardiovascular disease, end-stage renal disease, severe infection or sepsis and significant coagulopathy.

BMJ     May 15, 2025