Bailey R H, Bauer J H, Yanos J
Department of Internal Medicine, University of Missouri-Columbia 65212.
Crit Care Med. 1995 Jan;23(1):187-92. doi: 10.1097/00003246-199501000-00029.
To assess the initial accuracy, drift in calibration over several hours, and decline in accuracy over daily use of blood pressure transducers used in the critical care setting.
Prospective, criterion standard.
Three critical care units in a university hospital.
Twenty-seven consecutively available high-pressure transducers were used to measure intra-arterial blood pressures, and 11 consecutively available low-pressure transducers were used to measure central venous and pulmonary arterial blood pressures.
High-pressure transducers were compared with a mercury column manometer, and low-pressure transducers were compared with a water column manometer at three pressure levels. Data were collected initially after installation of the pressure transducer, at 3 hrs, and at 6 hrs. Data collections were repeated on subsequent days.
a) The majority of pressure transducers are accurate; b) there is no drift in the accuracy of pressure transducers over several hours; c) the accuracy of pressure transducers does not decline over subsequent days. Some transducers over-estimated standard pressures by 10 mm Hg and/or underestimated standard pressure by 17 mm Hg.
The majority of pressure transducers used in the critical care setting are accurate, although there are some transducers that may compromise patient care. Blood pressure transducers should be checked against a standard manometer upon installation, and daily during use.
评估重症监护环境中使用的血压传感器的初始准确性、数小时内校准的漂移情况以及日常使用中准确性的下降情况。
前瞻性、标准对照。
大学医院的三个重症监护病房。
连续使用27个高压传感器测量动脉内血压，连续使用11个低压传感器测量中心静脉压和肺动脉压。
在三个压力水平下，将高压传感器与汞柱压力计进行比较，将低压传感器与水柱压力计进行比较。在安装压力传感器后、3小时和6小时时最初收集数据。随后几天重复数据收集。
a）大多数压力传感器是准确的；b）压力传感器的准确性在数小时内没有漂移；c）压力传感器的准确性在随后几天没有下降。一些传感器高估标准压力10毫米汞柱和/或低估标准压力17毫米汞柱。
重症监护环境中使用的大多数压力传感器是准确的，尽管有一些传感器可能会影响患者护理。血压传感器在安装时应与标准压力计进行核对，并在使用期间每天进行检查。
