Trends in Blood Gases Analysis-Portable Blood Gas Analyzers,POC Testing, and Venous Blood Gas Values

摘要

Arterial blood gas (ABG) analysis consists of three separate measurements—pH, pCO_2, and pO_2, but depending on the platform may also include calculated values for bicarbonate (HCO_3), base excess (BE), total CO_2 (TCO_2), and blood oxygen saturation (sO_2). Together, these measurements are evaluated to assess acid–base status, ventilation, and arterial oxygen-ation. Though arterial needlesticks, as required by ABG platforms, are routine in many hospital departments, the pro-cedure can result in patient discomfort and serious adverse events such as arte-rial injury, thrombosis or embolization, hematoma, aneurysm formation, and reflex sympathetic dystrophy.~(1-4) Also problematic is the risk of needlestick to the health-care provider. In contrast, sampling of venous blood gases is usually less invasive, less painful, and more convenient. Researchers are currently exploring venous blood gas analysis, in conjunction with noninvasive pulse oxymetry measurements of arterial oxygen saturation (SpO_2), as a comparable surrogate method for assessing patient respiratory function and establishing acid-base status.~(5-7)