journal article·2025-05-20Open access

Reliability of the Fluorescence-Sensitive Optical Sensor Measurement of TcPO2 and Susceptibility to Pressure Injury Around the Foot

Melanie Mir-Jiménez, Marta Izquierdo-Renau, Iván Julian-Rochina

Applied Sciences· Volume 15· Issue 10

Abstract

Pressure injuries (PIs) are typically characterized by lesions of the dermis and subcutaneous tissue; they result from a downward force exerted on the area between a bony prominence and an external surface. Transcutaneous oxygen pressure (TcPO2) measurements are a standardized method for measuring tissue oxygen pressure. Standardized TcPO2 measurement data are lacking in regions susceptible to pressure injury. It is unclear whether the absence of data can be attributed to the unreliability and variability of the measurements obtained. This study aimed to assess the reliability and repeatability of TcPO2 measurements conducted using a fluorescence-sensitive photo-optical sensor at three sites on the foot where PIs can occur but for which no data are available. Thirty volunteers participated in this study. TcPO2 was measured in two sessions, one week apart, at the lateral of the fifth metatarsal head, the styloid process, and the lateral malleolus of both feet. TcPO2 (mmHg) exhibited moderate reliability for the left fifth metatarsal and right fifth metatarsal styloid process (ICC: 0.575 and 0.624, respectively). The right fifth metatarsal and the right and left lateral malleoli demonstrated good and excellent reliability of the styloid process of the left fifth metatarsal, with ICC values of 0.810, 0.816, 0.763, and 0.900, respectively. The implementation of a fluorescence-sensitive photo-optical sensor for the measurement of TcPO2 in the designated regions yielded reliable and reproducible measurements.
Source: crossref · Quality: baseline

Research context

OpenAlex topics: Non-Invasive Vital Sign Monitoring · Cardiovascular and Diving-Related Complications · Balance, Gait, and Falls Prevention

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Graduate in Podiatry, Son Espases University Hospital, Plaça de l’Hospital, 3, 07012 Palma, Spain

Nursing Department, University of Valencia, 46010 Valencia, Spain

Frailty Research Organized Group (FROG), University of Valencia, 46010 Valencia, Spain

Ulcers and Wounds Nursing Unit, La Fe University and Polytechnic Hospital, Avinguda de Fernando Abril Martorell, 106, 46026 Valencia, Spain

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