Limitations of pulse oximetry: respiratory insufficiency--a failure of detection.
نویسندگان
چکیده
Acute respiratory insufficiency may occur through failure of any component of the respiratory apparatus from the brain to the lungs. Causes include acute exacerbation of an underlying disease, such as asthma or chronic obstructive airways disease; interference with the mechanical action of the lungs and chest-for example, trauma or pneumothorax; interference with the neuromuscular function-for example, stroke or poliomyelitis; or even injudicious use of sedative or narcotic drugs. The resultant hypoxaemia or hypercapnia (or both) may be life threatening, and, although these are often readily apparent from clinical signs, in some instances they may be difficult to detect. The introduction of pulse oximetry, a non-invasive method of measuring arterial oxygen saturation, has certainly enhanced the detection of borderline hypoxaemia. Indeed, pulse oximetry is now widely used, its worth having been proved in many clinical settings. Although pulse oximetry measures adequacy of oxygenation, it does not measure the adequacy of ventilation. We present a case in which over-reliance on the pulse oximeter resulted in failure to detect severe ventilatory insufficiency.
منابع مشابه
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ورودعنوان ژورنال:
- BMJ
دوره 307 6900 شماره
صفحات -
تاریخ انتشار 1993