Methodology for acquisition of PAT has been described previously.[15 (link),16 (link)] Briefly, we used a PAT device (Endo-PAT2000; Itamar Medical, Caesarea, Israel) to measure pulse amplitude at rest in the fingertip of the index finger of each hand. We then induced reactive hyperemia in one arm with 5 minutes of forearm cuff-occlusion. Pulse amplitude was recorded in both arms and data were analyzed by a computerized algorithm (Itamar Medical). To calculate the PAT ratio, the ratio of the post-deflation pulse amplitude to the baseline pulse amplitude in the 90- to 120-second post-deflation time period (i.e., Xh90–120/ Xh0: h denotes hyperemic finger, 0 denotes baseline, and X represents the pulse amplitude) was divided by the corresponding ratio from the contralateral hand (i.e., Xc90–120/ Xc0: with c denoting the control finger and 0 denoting baseline).
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Lab products found in correlation
2 protocols using computerized algorithm
1
Measuring Peripheral Artery Tone via PAT
2
Digital Pulse Amplitude Measurement for FMD
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Digital pulse amplitude was measured simultaneously with FMD in a fasting state and supine position using a portable appliance testing (PAT) device comprising a pneumatic plethysmograph measuring digital pulse volume changes (Endo-PAT2000, Itamar Medical, Caesarea, Israel) [15] (link). The digital pulse amplitude was acquired continually during the examination and digitally recorded to a laptop. Data were analyzed by a computerized algorithm (Itamar Medical), which automatically and operator-independently calculates Assessment of RHI.
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