The Stealth Station Image Guidance System may interfere with pulse oximetry

Area of Science:

• Biomedical Engineering
• Medical Device Technology
• Surgical Navigation Systems

Background:

• Pulse oximetry is a critical tool for monitoring patient oxygenation.
• Various factors can cause interference with pulse oximetry readings, leading to inaccurate data.
• The Stealth Station is a frameless stereotactic system used in surgery.

Purpose of the Study:

• To identify and describe a novel source of pulse oximetry interference from the Stealth Station.
• To provide an overview of common pulse oximeter interference sources for clinical awareness.
• To explain the mechanism by which the Stealth Station interferes with pulse oximetry.

Main Methods:

• Analysis of the Stealth Station's technical features, specifically its infrared light emission.
• Review of pulse oximeter operating principles and susceptibility to light interference.
• Correlation of Stealth Station's operational frequency with pulse oximeter sensitivity.

Main Results:

• The Stealth Station emits time-varying infrared light at 4 Hz.
• This specific light frequency interferes with the pulse oximeter's ability to detect arterial signals.
• Interference results in invalid pulse oximetry readings.

Conclusions:

• The Stealth Station's infrared light is a source of pulse oximetry interference.
• Awareness of this interference is key to prevention.
• Shielding the pulse oximeter sensor from the infrared light source can resolve the issue.