ArticleThe Journal of surgical research2025
Insights From Bone and Muscle Oxygenation Toward a More Comprehensive Model of Tissue Healing.
Article in The Journal of surgical research, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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13 authors.
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Abstract
introductionPredicting healing after amputation and revascularization in diabetes and PAD patients with tissue loss is challenging. Current methods, like transcutaneous oximetry, only measure skin oxygenation, overlooking deeper tissues critical for wound healing. Near-infrared spectroscopy (NIRS) during postocclusive reactive hyperemia (PORH) measures muscle oxygenation under ischemic stress but does not account for bone, which is crucial in healing of complex wounds. This study employed NIRS during PORH to evaluate both bone and muscle perfusion in a swine model of hindlimb ischemia.
methodsEight Ossabaw swine underwent right hindlimb ischemia induction via endovascular coil occlusion of the right external iliac, femoral, and popliteal arteries. PORH was performed before (T0) and 4 wk after ischemia induction (T4) using a 5-min infrarenal aortic occlusion, with NIRS recording oximetry changes in bilateral gastrocnemius muscle and metatarsal bones. Data endpoints were derived in MATLAB.
resultsAt T0 (normal circulation), bone showed a smaller StO
conclusionsBone and muscle display distinct oxygenation dynamics under ischemia. Chronic ischemia attenuates metabolic and reperfusion responses in both tissues. These findings highlight bone's under-recognized role in ischemia/reperfusion events and the need for comprehensive tissue-specific oxygenation models to predict healing outcomes.
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