Abstract
Often, when performing reconstruction of nerve trunks, between the ends of the damaged nerve, the presence of diastasis is noted, which requires significant nerve tension in order to overcome it. This, in turn, can lead to a violation of the blood supply to the nerve and damage to its ultrastructures, which leads to unsatisfactory treatment results. The possibility of using intraoperative infrared fluorescence angiography in reconstructive surgical interventions for peripheral nerve damage, in order to assess the degree of blood flow disturbance in the nerve trunk, is considered. In patients with a complete anatomical break during the operation, an attempt was made to overcome diastasis by measuring the tension force (up to 3 N) with which the nerve was affected. Infrared fluorescence angiography with indocyanine green was performed simultaneously. The obtained angiograms were analyzed, and the effect of the tension force on the change in blood flow in the nerve trunk was determined. It was found that when exposed to a force of up to 2 N, there is no significant change in the intraneural blood flow. At the same time, the effect of a force of 3 N is manifested on angiograms by a significant decrease in the volume of blood flow, which is usually due to constriction of the vessels due to their stretching. After reconstruction (microsurgical epineural suture), repeated angiography was performed to assess the safety and adequacy of blood supply to the nerve. It was revealed that the use of intraopreational angiography with indocyanin green is an affordable and easily feasible technique that allows to determine the safety and, equally important, the adequacy and efficiency of blood flow in the nerve trunk. This technique makes it possible to monitor the safety of blood flow in the nerve trunk, to study the mechanisms of compensation of blood supply to the nerve after microsurgical epineural suture, to assess the quality of comparison of nerve stumps along the axis, excluding the possibility of their "twist".