Aim. To assess the application of intraoperative neurophysiological monitoring (IONM) for spinal surgeries in accordance with the Federal Center of Traumatology, Orthopedics and Endoprosthesis (Cheboksary, Russian Federation)Material and methods. A total of 366 spinal surgeries, Federal Center of Traumatology, Orthopedics and Endoprosthesis from 2009 to 2015. From 2009 to 2013, the wake-up test was used as a control method in 116 (65.9%) cases.Results. Application of IONM revealed time-dependent risks and facilitated a reduction in the incidence of postoperative neurologic complications by 3-fold (from 2.6% to 0.8%). In the second half of 2013, IONM was introduced for use in clinical practice. Since then, 250 surgeries were performed with IONM. Of these, the wake-up test was required in 9 (3.6%) patients. Clinical implementation of IONM extended the benefits of surgery to patients with severe pathologies. The number of surgeries for congenital pathologies increased by 10-fold (from 1% to 10%) and by 2.6-fold for degenerative diseases. IONM possibility allows control of intraoperative neurologic complications among patients with spinal injuries (5%) and neuro and muscular scoliosis.Conclusions. The application of IONM minimized the need for the wake-up test and significantly decreased the incidence of neurological complications caused by injury to the spinal cord and spinal roots during execution of spinal manipulations.

Background. Data from the national registers of arthroplasty showed that about 12% of hip and knee arthroplasty undergo revision within 10 years after the primary surgery. The leading cause of hip revisions is aseptic loosening of components, knee joint periprosthetic infection (PPI). Some of the infectious complications, including those related to mechanical causes, remain out of sight. The aim of the study was to identify the frequency of unexpected infections during revision knee and hip arthroplasty performed for aseptic complications of any etiology. Materials and Methods. 839 cases of revision arthroplasty of knee and hip joints were analyzed, including 485 aseptic revisions in 450 patients. Clinical, X-ray, laboratory (complete blood count and comprehensive metabolic panel, coagulation panel) methods, synovial fluid analysis and microbiological examination of punctures, including intraoperative ones, were used. The ICM and EBJIS (European Bone and Joint Infections Society) consensus recommendations were used as criteria for assessing the presence of infection. Results. The average age of patients at the time of the revision was 61.7 years. The hip joint prevailed (59.4%), knee joint 40.6%. The growth of microorganisms in the intraoperative biomaterial was detected in 2.08% of observations: in 10 out of 287 patients after aseptic revision of the hip joints and in none of the 198 revisions of the knee joints. In 8 out of 10 cases, the causative agents were coagulase-negative staphylococci, including 6 MRSE; in two cases, anaerobic bacteria. All revisions were carried out by a one-stage method. Patients with detected PPI underwent systemic antibacterial therapy. At the stage of catamnesis, reinfection was assumed in one of the 10 identified cases of PPI, the patient did not show up for revision. In control 63% of the group of the other (aseptic) 470 patients, PPI developed in 4 cases, two-stage revisions were carried out. Conclusions. The frequency of infections accidentally detected during aseptic revisions of large joints was 2.08%. Three-time examination of joint punctures, including intraoperative, provides additional opportunities for the diagnosis of PPI during aseptic revision, and also allows you to choose the optimal stage of revision treatment. The experience gained makes it possible in certain cases to perform one-stage revision in the treatment of PPI.