Monitoring of Venous and Arterial Occlusion With Remote Interstitial Tissue Glucose Measurement Systems in a Rabbit...

Area of Science:

• Biomedical Engineering
• Surgical Research
• Metabolic Monitoring

Background:

• Free tissue transfer necessitates vigilant postoperative monitoring for vascular occlusion.
• Existing research on interstitial glucose and tissue perfusion is limited, particularly regarding long-term occlusion-reperfusion.
• The study addresses the need for improved methods to detect vascular compromise in reconstructive surgery.

Purpose of the Study:

• To investigate the correlation between controlled venous and arterial occlusion and interstitial tissue glucose changes.
• To evaluate the efficacy of a remote interstitial glucose monitoring device in detecting vascular occlusion.
• To establish criteria for identifying vessel occlusion based on interstitial glucose concentration shifts.

Main Methods:

• An experimental study involving eight New Zealand White rabbits with perforator flaps.
• Continuous monitoring of interstitial glucose levels using a FreeStyle Libre flash glucose monitoring system.
• Experimental venous (75 min) and arterial (45 min) occlusion, with glucose monitoring at 15-minute intervals.

Main Results:

• Venous occlusion significantly increased interstitial glucose levels (47.8% at 15 min), which later declined post-reperfusion.
• Arterial occlusion caused a rapid decrease in interstitial glucose (56% at 15 min), leading to total flap necrosis.
• Interstitial glucose changes provided reliable indicators for both venous and arterial occlusion events.

Conclusions:

• Interstitial glucose monitoring is a reliable method for detecting vascular occlusion in experimental free tissue transfers.
• This technique offers a potentially rapid, minimally invasive, and cost-effective approach for postoperative flap monitoring.
• Further human trials are recommended to validate these findings and assess clinical applicability.