Description

The SP02 Toe Sensor is a specialized pulse oximetry device designed for non-invasive monitoring of peripheral oxygen saturation (SpO₂) and pulse rate. Its unique design allows for placement on the toe, making it suitable for both human and veterinary applications. This sensor is particularly useful in clinical settings such as intensive care, emergency monitoring, and general health assessments.

Design and Functionality

• Placement and Style: Available in clip-like or wrap-style forms, the sensor includes an emitter and a photodetector to measure light absorption through tissue. Proper alignment with the nail bed is crucial for accurate readings.
• Versatility: Some models offer pressure adjustment features to ensure an optimal fit, especially on small or thin tissues. Disposable versions are available for infants, intended for single-patient use and secured with foot and ankle wraps.

Operational Considerations

• Light Emission: The sensor emits red and infrared light, typically at wavelengths of 660–663 nm and 890–940 nm, respectively. It calculates blood oxygen levels by measuring differential absorption.
• Accuracy Factors: Proper placement is essential, as the sensor is sensitive to motion artifacts, ambient light, and other factors like nail polish, skin pigmentation, and certain medications.

Clinical Applications

The SP02 Toe Sensor is widely used for monitoring conditions such as respiratory syndromes, Covid-19, asthma, pneumonia, sleep apnea, and more. In veterinary settings, it provides reliable SpO₂ and pulse rate monitoring when used with compatible systems.

Performance and Limitations

• Reliability: While generally reliable, the sensor may show lower accuracy compared to finger or earlobe probes, particularly when SaO₂ levels are below 90%.
• Environmental Interference: To enhance accuracy, it is recommended to use covers or wraps to minimize ambient light interference.

Safety and Materials

The sensor is designed to be latex-free, ensuring biocompatibility and electrical safety. It should not be used on extremities with blood pressure cuffs or arterial lines proximal to the site.

Maintenance and Lifespan

Reusable sensors typically have a lifespan of 1 to 1.5 years, while disposable models are intended for single-patient use. Compliance with regulatory standards such as FDA 510k and ISO certifications underscores the quality and reliability of the SP02 Toe Sensor.

Usage Guidelines

• Proper Fit: Ensure a secure but not overly tight fit, and minimize movement during measurements.
• Site Management: For infant sensors, change the measuring site every 2–3 hours to prevent injury, especially in higher ambient temperatures.

The SP02 Toe Sensor represents a vital tool in accurate and reliable pulse oximetry, tailored to meet diverse clinical needs with precision and care.