止血带加压所需的精确压力尚未确定，有证据表明许多年来我们所使用的压力偏大，真正需要的正确压力在某种程度上要根据患者年龄、血压以及肢体的周径来确定，Reid 、Camp和Jacob借助于多普勤听诊器（Doppler Stethoscope）测量使外周脉搏消失所需的压力，并以此确定使用止血带所需压力。考虑到侧支循环及血压的变化，他们将此压力上肢提高100-150mmHg(13-20kp)下肢提高200-300mHg(26-40kp)，即止血带压力在上肢为190～300mmHg(25-40kp)，下肢为280-450mmHg(37-60kp)，维持此压力即可达到满意的止血效果。
The exact pressure required for tourniquet pressurization has not been determined. There is evidence that the pressure we have used for many years is too high. To some extent, the correct pressure we really need is determined according to the patient's age, blood pressure and limb circumference. Reid, camp and Jacob use the Doppler stethoscope to measure the pressure required to make the peripheral pulse disappear, so as to confirm Set the pressure required for tourniquet use. Considering the changes of collateral circulation and blood pressure, they increased the pressure of upper limb by 100-150mmhg (13-20kp) and lower limb by 200-300mmhg (26-40kp), that is, the pressure of tourniquet was 190-300mmhg (25-40kp) in upper limb and 280-450mmhg (37-60kp) in lower limb. Maintaining this pressure can achieve satisfactory hemostasis effect.
通过Crenshaw等人的研究，充气压力较低时宽的止血带比窄的止血带更为有效，Pedowitz等人证实采用弧形止血带（Curved Tourniquet） 对圆锥形的肢体部分加压时，使动脉闭塞所需的压力比使用直止血带（长方形的）时（Straight Tourniqnet） 显著降低（图2－1）。因此在圆锥形的大腿上应避免使用直止血带，尤其是在那些肌肉非常丰富或过度肥胖的患者。
According to the research of Crenshaw et al., the wide tourniquet with lower inflation pressure is more effective than the narrow tourniquet. Pedowitz et al. Confirmed that when the curved tourniquet is used to pressurize the conical limb part, the pressure required for artery occlusion is significantly lower than that when the straight tourniqnet is used (Fig. 2-1). Therefore, the use of straight tourniquets should be avoided on the conical thighs, especially in patients with very rich muscles or obesity.