Mars M, Hadley G P
University of Natal Medical School, Republic of South Africa.
Injury. 1994 Aug;25(6):379-81. doi: 10.1016/0020-1383(94)90130-9.
Pulse oximetry has been proposed as an aid to monitoring raised intracompartmental pressures (ICPs). ICP and percentage haemoglobin oxygen saturation in the affected limb were studied in 10 consecutive patients with raised ICP. Compartment pressures ranged from 28 to 64 mmHg (mean 40.9 mmHg). In two patients with absent pulses, pulse oximetry failed to detect pulsatile flow and recorded 0 per cent saturation. The remaining eight patients, including four with absent peripheral pulses, all had percentage haemoglobin saturations within 2 per cent of the opposite normal limb. Arterial haemoglobin desaturation was not associated with raised ICP. The presence of an oximeter signal and a normal reading does not necessarily imply adequacy of tissue perfusion. Pulse oximetry does not appear to be a reliable aid in the diagnosis or monitoring of impaired perfusion due to raised ICP.
脉搏血氧测定法已被提议作为监测骨筋膜室压力升高（ICP）的辅助手段。对10例连续的ICP升高患者的患侧肢体的ICP和血红蛋白氧饱和度百分比进行了研究。骨筋膜室压力范围为28至64 mmHg（平均40.9 mmHg）。在2例无脉搏的患者中，脉搏血氧测定法未能检测到搏动血流，并记录为0%饱和度。其余8例患者，包括4例无外周脉搏的患者，其血红蛋白饱和度百分比均在对侧正常肢体的2%以内。动脉血红蛋白去饱和与ICP升高无关。存在血氧仪信号和正常读数并不一定意味着组织灌注充足。脉搏血氧测定法似乎不是诊断或监测因ICP升高导致的灌注受损的可靠辅助手段。
