November 2020

Measuring Topical Oxygen Therapy Result with NIRS

Example of NIRS images and wound improvement achieved when TOT initiated

Chronic wounds are defined as those not proceeding through the orderly phase of tissue repair with 30 days; incidence of these wounds continue to rise, creating a burden not only on patients, but the healthcare system as well. This study sought to determine the effects of continuous topical oxygen therapy (TOT) on wound perfusion as measured with a near-infrared spectroscopy device (NIRS).

Five patients (age range 42 – 91 yrs) with a history of lower extremity wounds lasting more than 30 days qualified. After standard wound assessment, active continuous TOT was initiated, with weekly NIRS images to track oxygenated hemoglobin levels; standard wound measurements were also obtained. Patients were seen for 6 weekly visits or until the wound healed.

NIRS showed all 5 patients had increased oxygenated hemoglobin in the wound base along with improvements in other wound measurements. Healing was complete in 3 of the 5 patients by the 6-week mark, with the 2 others healing shortly thereafter (with continued TOT).

The author concluded that NIRS was a user-friendly imaging device for tracking wound progress and that TOT offers an effective non-invasive chronic wound treatment.

Source: Cole W. The Use Of Topical Oxygen Therapy System to Promote Healing in Chronic Wounds. Poster presented at Symposium on Advanced Wound Care (SAWC) Fall Virtual. Sept. 18-20, 2020.

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