TRANSCUTANEOUS MEASUREMENT OF HEMOGLOBIN CHANGES TO CALCULATE ESTIMATED BLOOD VOLUME CHANGE DURING PERITONEAL DIALYSIS

摘要

An embodiment of the disclosure provides a method for measuring change in blood volume using a transcutaneous measurement system applied to a patient's skin. The method involves placing a sensor in contact with the skin of a patient, where the sensor includes a light emitter and a photodetector. An intensity of light emanating from the light emitter is set and an initial intensity of light received at the photodetector is determined, where the light received at the photodetector has traveled through the patient's tissue. A later determination is then made of the intensity of the light received at the photodetector. A change in the blood volume is determined based on the intensity of the light emanating from the light emitter, the initial intensity of light received at the photodetector and the final intensity of light received at the photodetector.

主权项

1. A method for measuring change in blood volume using a sensor comprising a light emitter and a photodetector in contact with a tissue membrane of a patient, the method comprising:
setting an intensity of light emanating from the light emitter and through an optical zone of the tissue; determining an initial intensity of the light received at the photodetector after passing through the optical zone; determining a second intensity of light received at the photodetector at a predetermined time after the determination of the initial intensity; and determining a change in blood volume of the patient based on the intensity of the light emanating from the light emitter, the initial intensity of light received at the photodetector, and the second intensity of light received at the photodetector.