The PAT ® Signal

Product catalog summary

Overview of PAT Technology and Sleep Monitoring

Muscle Tone and Airway Dynamics: Muscle tone decreases leading to airway collapse, which can result in respiratory cessation. This triggers a fight or flight response, activating the sympathetic nervous system.

Physiological Responses: Sympathetic activation causes constriction of digital arteries and an increase in heart rate, affecting peripheral arterial tone.

The PAT® Signal: The Peripheral Arterial Tone (PAT) signal is crucial for monitoring sleep onset and attenuation. The innovative PAT biosensor applies uniform pressure around the fingertip, ensuring optimal signal quality and precise measurement without confounding influences like venous blood pooling.

Unique Physiology of the Finger: The finger is an ideal site for measurement due to its high vascular density, significant blood flow changes, and the presence of alpha adrenergic receptor pathways, which are indicative of sympathetic nervous system activation.

Sleep Stages with WatchPAT: Sleep stages are classified based on unique signatures in PAT amplitude and heart rate. Sleep/Wake differentiation utilizes data from the wrist Actigraph and additional WatchPAT channels. The table below summarizes the variability in PAT amplitude and heart rate across different sleep stages:

Light Sleep: High PAT amplitude, high variability, high heart rate variability.
Deep Sleep: High PAT amplitude, low variability, low heart rate variability.
REM Sleep: Low PAT amplitude, very high variability, very high heart rate variability.

Clinical Validation: The WatchPAT device has a 90% correlation to in-lab polysomnography (PSG) and is clinically validated for measuring true sleep time and complete sleep architecture.

Conclusion: The PAT technology offers a simple, accurate, fast, and reliable method for home sleep testing, powered by clinically validated technology.

Catalog excerpts

itamar medical a. Muscle Tone Decreases b. Airway Collapses Respiratory Cessation WatchPAT Fight or Flight Response k. Digital Arteries Constriction Heart Rate WatchPAT Home Sleep Testing Made Simple Powered by the PAT® technology Innovative Technology The Finger - Unique Physiology The PAT biosensor applies a uniform field of pressure around the fingertip • Enables optimal signal quality • Creates a precise measurement environment without any confounding influences (such as venous blood pooling) High vascular density Tremendous blood flow changes Only alpha adrenergic receptor pathways: a surrogate of sympathetic nervous system activation Convenient site for measurement Sleep Stages with the WatchPAT Simple, Accurate, Clinically Fast and Reliable Validated 90% Measures True Sleep Time Correlation to (TST) and Complete Sleep *Yalamanchali S, Farajian V, Hamilton C, Pott TR, Samuelson CG, Friedman M. Diagnosis of obstructive sleep apnea by peripheral arterial tonometry: meta-analysis. JAMA Otolaryngol

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The PAT ® Signal

The PAT ® Signal

Catalog excerpts

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