Quantitative fluorometry as a monitor for microvascular surgery

Area of Science:

• Vascular Surgery
• Surgical Monitoring
• Biomedical Engineering

Background:

• Postoperative occlusion of vessels is a critical complication in microvascular surgery.
• Effective monitoring techniques are essential for timely intervention and improved patient outcomes.
• Current monitoring methods may have limitations in sensitivity or specificity.

Purpose of the Study:

• To evaluate the efficacy of quantitative fluorometry for detecting vascular occlusion in microvascular surgery.
• To assess the accuracy and limitations of quantitative fluorometry in laboratory and clinical settings.
• To establish a protocol for the clinical application of quantitative fluorometry in microvascular procedures.

Main Methods:

• Laboratory study involving rat abdominal flaps with controlled vascular occlusion.
• Clinical review of 34 microvascular cases (14 free flaps, 20 replantations) utilizing fluorometry.
• Comparison of fluorometry findings with other established monitoring techniques.

Main Results:

• Accurate detection of vascular occlusion within 20 minutes in laboratory models.
• Inability to differentiate between arterial and venous occlusion using quantitative fluorometry.
• Clinical validation corroborated occlusion in six cases and provided a discordant diagnosis in one case, avoiding unnecessary exploration.

Conclusions:

• Quantitative fluorometry is a valuable tool for monitoring vessel patency in microvascular surgery.
• It can be used as a primary or adjunctive monitoring method when occlusion is suspected.
• A protocol for clinical use is proposed to guide its application in practice.