Arm conicity is associated with non-invasive blood pressure (NIBP) measurement error and may be avoided by using finger cuffs. Predicting arm conicity may help decisions regarding NIBP measurement techniques. We obtained upper limb measurements of adults presenting to the Pre-Anesthetic Clinic to determine: the suitability of arm and finger cuff sizes; the best anthropometric predictor of arm conicity based on the right arm slant angle; the incidence of a right arm slant angle < 83 degrees. Right mid-arm circumference (MAC) was compared to recommended cuff sizes and finger circumference compared to available cuffs. Slant angle was calculated from the measurements obtained. Linear regression was used to determine the better predictor of right arm slant angle. Correlation coefficients were calculated and R2 values compared. Four hundred fifty-four patients participated and 453 had cone-shaped arms. One participant (0.2, 95% CI 0.0–1.2) had a MAC outside the recommended cuff range. Twenty-five participants (5.5, 95% CI 3.6–8.0) had a middle finger circumference greater than the largest ClearSight™ cuff. Body mass index (BMI), weight and right MAC all had low to moderate correlation with right arm slant angle (r = − 0.49, − 0.39, − 0.48, all p < 0.001) and regression revealed R2 values of 0.24, 0.15 and 0.23. Six participants (1.3, 95% CI 0.5–2.9) had a slant angle < 83 degrees. Current NIBP equipment caters for most patients, based on the traditional measure of MAC. The utility of finger cuffs is limited by cuff size. BMI and right MAC showed the most promise in predicting arm conicity.

中文翻译：

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接受择期手术的成人上肢尺寸 - 对血压测量的影响。


手臂锥度与无创血压 (NIBP) 测量误差相关，可以通过使用指套来避免。预测手臂锥度可能有助于做出有关 NIBP 测量技术的决策。我们对在麻醉前诊所就诊的成年人进行了上肢测量，以确定： 手臂和手指袖带尺寸的适用性；基于右臂倾斜角度的最佳手臂锥度人体测量预测器；右臂倾斜角度< 83 度的发生率。将右中臂周长 (MAC) 与推荐的袖带尺寸进行比较，并将手指周长与可用袖带进行比较。根据获得的测量值计算倾斜角。使用线性回归来确定右臂倾斜角度的更好预测因子。计算相关系数并比较 R2 值。共有 454 名患者参加，其中 453 名患者手臂呈锥形。一名参与者（0.2，95% CI 0.0-1.2）的 MAC 超出了推荐的袖带范围。 25 名参与者（5.5，95% CI 3.6-8.0）的中指周长大于最大的 ClearSight™ 袖带。体重指数 (BMI)、体重和右侧 MAC 均与右臂倾斜角度具有低至中度相关性（r = − 0.49、− 0.39、− 0.48，所有 p < 0.001），回归显示 R2 值为 0.24、0.15 和0.23。六名参与者（1.3，95% CI 0.5-2.9）的倾斜角度为 < 83 度。目前的 NIBP 设备基于传统的 MAC 测量，适合大多数患者。手指袖带的实用性受到袖带尺寸的限制。 BMI 和右 MAC 在预测手臂锥度方面最有希望。