Finger sensor for pulse oximetry system.

摘要

A finger sensor for a pulse oximetry system comprising a body of flexible, resilient polymeric material formed as a pocket. On the inside walls of the pocket towards the closed end are situated a LED light source (18) and an opposing photodetector (22). The space within the pocket is divided into a central region (54) and lateral regions (30, 32). As a finger is inserted into the pocket with the fingertip between the LED and the photodetector, the central and lateral regions of the pocket expand, causing the walls of the pocket containing the LED and the photodetector to securely contact and retain the finger within the pocket. Due to the resilience of the material the pocket walls may expand and contract to engage fingers of varying sizes.