Motor nerve conduction study as new method of the assessment of efficiency of revascularization

Aim. The aim of our work is to define sensitivity and specificity of change of nerveconduction velocity as a method for the assessment of resolution of critical limb ishaemiaafter endovascular revascularization. Methods. 36 patients were examined, 29 patients amongthem had resolution of critical limb ishaemia and 7 patients had no resolution of critical limbishaemia. All patients underwent endovascular revascularization. Nerve conduction studyand lower limbs arteries duplex scan were carried out before and after revascularization(2 weeks later). We calculated sensitivity and specificity of change of nerve conductionvelocity as method of an assessment of resolution of critical limb ishaemia. Motor nerveconduction study was carried out from tibial nerve and from common peroneal nerve. Augmentation of nerve conduction velocity >20% in comparison with basic data at least on onenerve meant critical limb ishaemia is resolved. Results: Technical success rate amounted80.6% (n = 29). Technical success was not achieved in 19.4% (n = 7) because of impossibilityof affected arteries recanalization. The augmentation of nerve conduction velocity >20% incompare to initial was found at 82,8% (n = 24) patients who had resolution of critical limbishaemia in 2 weeks after revascularization. The augmentation of nerve conduction velocity>20% was absent in 17,2% (n = 5) patients who had resolution of critical limb ishaemia.The augmentation of nerve conduction velocity >20% was not found at 7 patients who hadno resolution of critical limb ishaemia at least on one nerve. Thus sensitivity of the methodis 82,8%, and specificity is 100%. Conclusion: The research of change of motor nerveconduction velocity of the lower extremities after operation of revascularization in patientswith atherosclerosis obliterans of the lower limb vessels is a sensitive and specific methodfor assessment of critical limb ishaemia resolution.