Circumferential Negative Intermittent Pressure to the Midarm Does Not Impair Digital O2 Saturation: A Randomized...

Area of Science:

• Biomedical Engineering
• Wound Healing Research
• Clinical Trials

Background:

• Circumferential negative pressure wound therapy (cNPWT) is a common treatment for wound management.
• A theoretical concern exists regarding potential distal perfusion impairment with cNPWT.

Purpose of the Study:

• To investigate the impact of cNPWT on distal perfusion.
• To assess the safety of cNPWT regarding oxygen saturation.

Main Methods:

• A randomized study involving 13 healthy volunteers.
• Application of intermittent cNPWT (125 mm Hg for 5 min on/2 min off) to the midarm for 9 hours.
• Measurement of bilateral index finger oxygen saturation (SpO2) using digital pulse oximetry, with the contralateral arm serving as control.

Main Results:

• No significant difference in the area under the curve of SpO2 between the intervention and control arms (P = 0.35).
• Digital SpO2 remained consistently high (≥94%) throughout the study in both arms.
• No adverse events were reported during the intervention.

Conclusions:

• Circumferential negative intermittent pressure at 125 mm Hg applied to the midarm does not adversely affect digital SpO2 in healthy individuals.
• Findings suggest cNPWT is safe concerning distal perfusion in the short term.