Challenges Associated with Pulmonary Function Testing Equipment

 While Pulmonary Function Testing using a capnograph is extremely accurate, water vapor can interfere with the proper operation and results in variety of ways:

Moisture Interference in Infrared Analysis used for CO2 Monitoring & Measurement

Water vapor appears on the scale in the same region as the CO2 peak, making the results difficult to read and introducing inaccuracies based on the operators’ interpretation of the results. Removal of the water, in vapor phase, preserves the CO2 level while eliminating interference.

Moisture build‐up in Sample Lines

Condensation from the breath gas sample stream can collect in the sample lines, a problem normally found when the fully saturated sample at body temperature is brought into contact with the lines at standard room temperature.

Moisture Collection in the Sensor Cell

Condensation in the sample will eventually reach the analyzer, and will cause irreparable harm to the sensor and render the equipment unusable. This is a problem commonly found when the fully saturated breath sample (at 37C body temperature) is brought to the analyzer at a colder room temperature. 

The Perma Pure Solution: ME Series Highly –Selective Permeation Tubing

Exhaled air creates condensation that can increase IR interference which reduces accuracy of measurements. Condensation can also damage equipment and create patient discomfort. Water traps are generally used, but can fill with liquid, leading to alarms, blocking of sample lines, and damaging expensive and sensitive medical monitoring systems. Perma Pure can help reduce reliance on water traps with our ME Series products.

Let Us Help You Overcome Your Moisture Management Challenges