Feasibility of Impedance Cardiography and Impedance Plethysmographyin Spine Surgery

Возможности методов импедансной кардиографии и импедансной плетизмографии в вертеброхирургии Objective. To analyze diagnostic potential of impedance car-diography (ICG) and impedance plethysmography (IPG) in high-risk spine surgery. Material and Methods. Monitoring of hemodynamic status using ICG and IPG methods was performed in staged surgical treatment with consecutive anterior and posterior approaches to the spine in a single operation in 30 patients with scoliosis and 15 patients with traumatic injuries to the thoracolumbar spine. Surgery was performed under total intravenous multi-component anesthesia with hypnotic drug propofol and artificial lung ventilation. Results. There were no reported deviations of analyzed parameters beyond the allowable limits, which testifies to the efficacy and adequacy of both anesthetic and infusion-transfusion management of the performed surgeries. ICG monitoring provided the assessment of hydration state of the lung intersti-tial space during surgical intervention associated with considerable intraoperative blood loss. Application of ICG and IPG methods allowed raising a safety level for operated patients. Conclusion. ICG method allows getting full information on the nature of changes in general circulation due to specific features of spine surgery. IPG method may be used in performing multimodal intraoperative spinal cord monitoring.