PURPOSE: @entity16 secondary to positioning is a significant perioperative problem and a common cause of @entity1 injury in the practice of surgery. Somatosensory evoked potentials' (SSEPs) monitoring has also been noted useful in evaluating upper extremity conduction changes related to positioning. The purpose of this article was to evaluate the effectiveness of intermittent monitoring of SSEPs, which detects peripheral nerve and @entity2685 caused by malpositioning during microvascular decompression (MVD). This article will also discuss the etiology and pathogenesis of @entity128 after MVD and the means to prevent them. METHODS: Intraoperative SSEP monitorings for 485 @entity1 who underwent MVD surgery were reviewed. A greater than or equal to 50% decrease in SSEPs amplitude and/or a greater than or equal to 10% increase in latency are considered significant change to produce potential postoperative @entity51 . Risk factors were reviewed and a Student t-test was performed for significant differences. RESULTS: The overall incidence of position-related upper extremity SSEP changes was 2.89%. No @entity1 with a reversible SSEP change developed a new @entity86 in the affected extremity. @entity1 with low body mass index, @entity6 had a higher rate of @entity2685 during MVD. Gender, age, and operation duration did not increase the risk of @entity2685 . Of the 14 @entity1 who had a significant change of SSEP, there were 6 ulnar nerve on the contralateral side and 8 median nerve on the ipsilateral side. All the changes occurred within 10 minutes after the @entity1 were positioned. CONCLUSIONS: When positioning the @entity1 for MVD with lateral position, careful attention should be paid to both the dependent (lower) arm extremities and the upper shoulders to prevent @entity1897 . Additional precautions should be taken if the @entity1 has a low body mass index or @entity6 . Continuous intraoperative SSEP monitoring of ulnar/median nerve function is a valid and useful technique to minimize intraoperative @entity16 during surgery.

Clinical Usefulness of Somatosensory Evoked Potentials for Detection of Peripheral Nerve and XXXX Secondary to Malpositioning in Microvascular Decompression.

@entity1 :: ('9606', 'Species') :: ['Patients', 'patients', 'patient'] @entity6 :: ('MESH:D003920', 'Disease') :: ['diabetes', 'diabetes mellitus'] @entity16 :: ('MESH:D009422', 'Disease') :: ['Neurologic injury', 'neurologic injuries'] @entity128 :: ('MESH:D020209', 'Disease') :: ['nerve injury'] @entity51 :: ('MESH:D009461', 'Disease') :: ['neurological deficit'] @entity1897 :: ('MESH:D010523', 'Disease') :: ['peripheral nerve injury'] @entity86 :: ('MESH:D019106', 'Disease') :: ['postoperative deficit'] @entity2685 :: ('MESH:C536265', 'Disease') :: ['brachial plexus injury']
@entity2685 :: (MESH:C536265,Disease) :: ['Brachial Plexus Injury']
