Baumgart S, Engle W D, Langman C B, Fox W W, Polin R A
Crit Care Med. 1980 Dec;8(12):721-4. doi: 10.1097/00003246-198012000-00004.
To evaluate radiant power received by infants under radiant warmers, 11 neonates (mean gestational age 32.2 weeks, mean weight 1.50 kg) were monitored. A wattmeter was used to evaluate warmer power (watts), and a thermopile placed at bed level was used to correlate warmer power to radiant power density received (mw/cm2). Warmer power ranged from 133-301 watts. A linear relationship existed between warmer power and radiant power density received (r = 0.97, p < 0.001). After establishing that radiant power delivery could be monitored with a wattmeter, this technique was used to quantitate radiant power in a small series of infants with and without a plastic shield. Radiant power density received decreased in all infants when shielded (mean 14.6-11.2 mw/cm2, p < 0.01). This study demonstrates: (1) radiant warmer power can be monitored with a wattmeter; (2) warmer power correlates to radiant power density received; and (3) radiant power monitoring can be used to evaluate radiant power demands in specific clinical situations.
为评估辐射保暖箱下婴儿所接收的辐射功率，对11名新生儿（平均胎龄32.2周，平均体重1.50千克）进行了监测。使用功率计评估保暖箱功率（瓦特），并使用置于床面水平的热电堆将保暖箱功率与所接收的辐射功率密度（毫瓦/平方厘米）相关联。保暖箱功率范围为133 - 301瓦特。保暖箱功率与所接收的辐射功率密度之间存在线性关系（r = 0.97，p < 0.001）。在确定可用功率计监测辐射功率输送后，该技术被用于对一小系列有或无塑料护罩的婴儿的辐射功率进行定量。所有婴儿在使用护罩时所接收的辐射功率密度均降低（平均从14.6降至11.2毫瓦/平方厘米，p < 0.01）。本研究表明：（1）可用功率计监测辐射保暖箱功率；（2）保暖箱功率与所接收的辐射功率密度相关；（3）辐射功率监测可用于评估特定临床情况下的辐射功率需求。
