4．4 体位的影响血压测量最常采用坐位或卧位,但这两种位置有不同大小。广泛认为在坐位时测的舒张压比卧位时要高些[约5 mm Hg(1 mm Hg:0．133 3 kPa)],虽对收缩压较少一致意见。当在两个位置时,手臂位置均仔细调节至袖带在右心房的水平,收缩压据报告在卧位时要比直立位时高8 mm Hg。另外要考虑的是背和腿的位置。如果背未支撑,舒张压可能增加6mm Hg,双腿交叉可增加收缩压2-8 mm Hg。 4.4 The impact of posture Blood pressure measurement most commonly used sitting or lying position, but the two positions have different sizes. It is widely accepted that the diastolic blood pressure measured at sitting is higher than that at supine position [about 5 mm Hg (1 mm Hg: 0.133 3 kPa)], although there is less agreement on systolic blood pressure. When in both positions, the arm position was carefully adjusted to the level of the cuff in the right atrium and systolic pressure was reported to be 8 mm Hg higher in the supine position than in the upright position. Another consideration is the back and leg position. Diastolic pressure may increase by 6 mm Hg if back is not supported, and systolic pressure 2-8 mm Hg if legs are crossed.