Annabi Emil H, Barker Steven J
Department of Anesthesiology, University of Arizona College of Medicine, P.O. Box 245114, Tucson, AZ 85724-5114, USA.
Anesth Analg. 2009 Mar;108(3):898-9. doi: 10.1213/ane.0b013e318172af73.
An elderly surgical patient acquired a life-threatening methemoglobinemia as a result of topical benzocaine spray to the oropharynx in preparation for awake endotracheal intubation. A new multiwavelength pulse oximeter, the Masimo Rad-57, detected this methemoglobinemia an hour before it was confirmed by laboratory CO-oximetry. The Rad-57 monitored the patient's methemoglobin levels during diagnosis and treatment with methylene blue, and the values it provided (as high as 33%) were very close to those of the laboratory CO-oximeter. The new pulse oximeter gave continuous readings of methemoglobin level at the bedside, whereas the laboratory values were delayed by up to an hour. This case demonstrates the clinical application of a multiwavelength pulse oximeter in the diagnosis and treatment of a life-threatening dyshemoglobinemia.
一名老年外科患者在准备清醒气管插管时，因口咽局部使用苯佐卡因喷雾剂而患上危及生命的高铁血红蛋白血症。一种新型多波长脉搏血氧仪Masimo Rad - 57在实验室一氧化碳血氧测定法确诊前一小时就检测到了这种高铁血红蛋白血症。Rad - 57在使用亚甲蓝诊断和治疗期间监测患者的高铁血红蛋白水平，其提供的值（高达33%）与实验室一氧化碳血氧仪的值非常接近。新型脉搏血氧仪可在床边连续读取高铁血红蛋白水平，而实验室值最多延迟一小时。该病例展示了多波长脉搏血氧仪在诊断和治疗危及生命的血红蛋白异常血症中的临床应用。
