Is the Tensys® T-Line® System accurate relative to a traditional NIBP cuff?
A. In general, the T-Line® System compares as favorably to a NIBP cuff as does an invasive A-Line. When making this comparison it is important to note that an A-Line and a traditional NIBP device measure blood pressure quite differently. Specifically, a standard cuff-based NIBP monitor only directly measures the mean arterial blood pressure and extrapolates the systolic and diastolic values via a number of different algorithms (most of which are distinct and proprietary to each monitoring equipment manufacturer). Alternatively, the A-Line waveform is a direct representation of the pressure waveform within the artery itself. The A-Line waveform is, however, substantially smoothed and processed by the “host” patient monitor and is subject to the well-documented effects of hydraulic coupling artifact. Therefore, a comparison of the T-Line® System or an A-Line to a traditional NIBP device can only reasonably be made with respect to mean arterial pressure and, to a lesser extent, systolic a
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