Spontaneous respiration during neurosurgical operations. II. Patients with vascular pathology of the posterior sections of the circle of Willis]

Spontaneous respiration (SR) was retained during surgery in 17 patients with vascular pathology in the posterior sections of the circle of Willis (arteriovenous malformations of posterior cranial fossa, arterial aneurysm) to control brain stem function and preserve its blood flow. SR disturbances developed during the basic stage of the operation in 4 patients and were caused by the occlusion of various vessels in posterior sections of the circle of Willis. The control of SR parameters as part of intraoperation monitoring in patients with vascular pathology in posterior sections of the circle of Willis makes it possible to assess the retention of brain stem blood flow and thus to optimize surgical tactics.