Perfusion Index Calculator

How to Use the Perfusion Index Calculator

1. Enter the Pulse Signal Amplitude (mV) in the first input field. This is the amplitude of the pulse signal detected by the sensor.
2. Enter the Photoelectric Signal Amplitude (mV) in the second input field. This is the amplitude of the photoelectric signal detected by the sensor.
3. Click the Calculate button to compute the Perfusion Index.
4. The result will be displayed as a percentage, along with an interpretation of what the value means for peripheral circulation.

Understanding the Perfusion Index

The Perfusion Index (PI) is a key parameter in pulse oximetry that helps assess peripheral circulation. It is calculated as the ratio of the pulse signal amplitude to the photoelectric signal amplitude, expressed as a percentage.

The PI value indicates the quality of blood flow in the peripheral tissues:

• PI < 2%: Indicates severe peripheral circulation problems, such as poor perfusion, cold extremities, or occlusive diseases.
• PI 2% - 20%: Suggests mild to moderate peripheral circulation issues that may require medical attention.
• PI > 20%: Indicates normal peripheral circulation, suggesting good blood flow to the extremities.

Practical Applications

The Perfusion Index Calculator can be used in various clinical settings:

• Assessing patients with peripheral artery disease
• Monitoring patients with diabetes for signs of poor circulation
• Evaluating extremity viability after trauma or surgery
• Checking for signs of shock or hypoperfusion

Note: This calculator provides an estimate of peripheral circulation and should be used as an aid to clinical assessment. Always consult with a healthcare professional for diagnosis and treatment.