PAT Technology

PAT technology is a non-invasive window to the cardiovascular system and autonomic nervous system. Peripheral Arterial Tone (PAT) signal is a proprietary technology used for non-invasively measuring arterial tone changes in peripheral arterial beds.

The PAT signal is measured from the fingertip by recording finger arterial pulsatile volume changes. Based on PAT Technology, the noninvasive EndoPAT system comprises a measurement apparatus that supports a pair of modified plethysmographic bio-sensors. The unique feature of the PAT bio-sensors is that they impart a uniform sub-diastolic pressure field to the distal two thirds of the fingers including their tips. Applying the pressure in this way is extremely important as it:

• Prevents distal venous blood pooling, that can induce a veno-arteriolar vasoconstriction reflex
• Unloads arterial wall tension which generates a greater dynamic range of the measured PAT signal
• Fixates the PAT bio-sensor to the finger, which reduces movement artifacts

Itamar-Medical Standard

Itamar products share the common concept of uniquely designed, single-use PAT finger probes, optimally tailored to measure the PAT signal with application-specific algorithms. The data acquired is automatically processed, analyzed, and presented to the physician by proprietary software. This standard provides for user-independent, highly-reliable, and reproducible medical devices, facilitating clinicians’ decision making process and researchers’ work in a user-friendly environment necessitating very little training.

Itamar Medical's PAT based devices strategically position the company to meet the diagnosis and consulting needs of busy medical centers and private practices in the 21st century.

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Intellectual Property 

The PAT Signal and methodology has a strong intellectual property position. Eight patents have been issued in the use to date, and over forty worldwide, with numerous applications currently pending. The first allowed US patent claim was very comprehensive and includes the following statement:

“Monitoring changes in peripheral arterial tone and determining that a change in the physiological condition of the patienthas occurred”