A-Line waveform

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.

T-Line® waveform

The TL-150 intelligently locates and tracks the radial artery while continuously displaying a self-calibrated arterial pressure waveform. The product architecture and signal processing capabilities of the TL-150 have been designed to mimic those of the standard radial arterial line. With this configuration, the T-Line® blood pressure waveform can be presented to the clinician in exactly the same location and with an equivalent fidelity to that of an invasive A-Line transducer.

Validation of accuracy

The TL-150 has been validated against a contralaterally placed invasive A-Line reference and has been found to meet the standards as specified in the AAMI SP-10:2002 Accuracy Specification 4.4.5.2.B. More specifically, this validation testing confirmed a mean difference between T-Line® and A-Line values not exceeding 5 mm Hg with one standard deviation not exceeding 8 mm Hg for systolic, mean and diastolic values.

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