• Kim-Gau Ng, Teng-Kuan Chua, Chilion Tan, James Cole, and Greg Quickel.
• HealthSTATS International Pte Ltd, Singapore, Singapore. kgng97@singnet.com.sg
• Blood Press Monit. 2007 Feb 1; 12 (1): 35-43.

BackgroundThe use of reusable transducers for invasive blood pressure monitoring can lead to cost savings for the hospital and help to reduce waste.ObjectiveTo evaluate the BD RT2000 reusable transducer system developed by Becton Dickinson.MethodsForty-one development samples were tested for their static accuracy, zero offset, zero drift and frequency response.ResultsThe static accuracy was +/-1 mmHg for the pressure range of -30 to +50 mmHg and +/-2% for the range of 50-300 mmHg. The zero offset of the transducers with no disposable dome attached ranged from -7.1 to +6.8 mmHg (mean+/-SD: 3.4+/-2.2), and that of the transducers with disposable dome attached ranged from 10.4 to 67.5 mmHg (33.3+/-13.2). The zero drift ranged from -0.7 to +2.6 mmHg (0.6+0.8) over 4 h and from -1.0 to +2.8 mmHg (0.5+/-0.9) over 8 h. The 15% bandwidth for the frequency response ranged from 86 to 166 Hz. It increased with the pressure at which the dome was coupled to the reusable transducer and the pressure at which the frequency response was tested.ConclusionThe static accuracy and zero offset meet the Association for the Advancement of Medical Instrumentation (AAMI) BP22:1994 standard. The zero drift is judged to be acceptable for arterial pressure measurement because a change of 3 mmHg is not clinically significant. The 15% bandwidth is judged to be adequate for fluid-filled pressure monitoring systems. It will be advantageous to couple the disposable dome to the reusable transducer when the disposable dome has a positive pressure.

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