Morris A H, Chapman R H, Gardner R M
Crit Care Med. 1985 Sep;13(9):705-8. doi: 10.1097/00003246-198509000-00002.
Using 94 flow-directed pulmonary artery catheters in 53 ICU patients, we obtained prospectively 282 pulmonary artery wedge pressure (WP) measurements from 286 attempts. After catheter manipulation, 96% of these WP measurements were ultimately free of technical problems, and 84% were confirmed by aspiration of pulmonary capillary blood from the wedge position. The 95% confidence interval for repeated measurements of WP in stable ICU patients was 4 mm Hg. The WP measurement error was defined as the difference between unconfirmed and confirmed WP pairs obtained from stable patients. The probability of encountering a WP measurement error of at least 4 mm Hg was 33% for the 93 WP measurements with technical problems, 5% for the 189 WP measurements without technical problems, and 14% for the entire set of 286 WP measurement attempts. Quality control procedures, including dynamic response testing, easily identified most errors.
我们对53名重症监护病房（ICU）患者使用了94根血流导向肺动脉导管，前瞻性地从286次尝试中获得了282次肺动脉楔压（WP）测量值。在导管操作后，这些WP测量值中有96%最终没有技术问题，并且84%通过从楔入位置抽取肺毛细血管血得到了证实。稳定的ICU患者重复测量WP的95%置信区间为4毫米汞柱。WP测量误差定义为稳定患者未确认和已确认的WP测量值对之间的差值。对于93次有技术问题的WP测量，遇到至少4毫米汞柱WP测量误差的概率为33%；对于189次无技术问题的WP测量，该概率为5%；对于286次WP测量尝试的整个集合，该概率为14%。包括动态响应测试在内的质量控制程序很容易识别出大多数误差。
