A Clinical Study of Patients with Primary Parkinson's Disease Undergoing Bilateral Deep Brain Stimulation (STN-DBS) Surgery in the Subthalamic Nucleus under General Anesthesia

SHI Yi-feng, ZHANG Ying, LI Peng

Abstract

To assess the efficacy and safety of bilateral subthalamic nucleus deep brain stimulation (STN-DBS) under general anesthesia and to provide the basis for clinical research related to DBS surgeries under general anesthesia.   Methods  A total of 60 patients with primary Parkinson's disease who underwent DBS surgery between January 2019 and December 2021at West China Hospital were enrolled for the study. Among them, 30 had the surgery while they were asleep, i.e., under general anesthesia, and 30, while they were awake, i.e., under local anesthesia. All the patients underwent bilateral STN-DBS surgery. Bispectral index (BIS) was used to monitor and control the depth of anesthesia. Microelectrode recording (MER) technology was used to record the characteristic signals of the bilateral subthalamic nuclei and verify their location during the operation. All patients completed the implantation of deep electrodes, connecting wires, and implantable stimulation generator (IPG) at one time. Postoperative thin-slice CT scans were done to reconstruct electrode images and to verify the accuracy of electrode implantation. The Unified Parkinson's Disease Rating Scale-Ⅲ (UPDRS-Ⅲ) was used to evaluate the preoperative vs. postoperative improvement in motor symptoms, and the results of intraoperative MER and the occurrence of surgery-related complications were documented and analyzed.   Results  All patients successfully completed the implantation surgery. The electrodes were accurately implanted at the right position and there was no significant difference between the general anesthesia group and the local anesthesia group in UPDRS-Ⅲ scores and medication dosage differences before and after the operation. No intracranial hemorrhage, cerebral infarction, or infection occurred after the operation, and 5 patients had temporary mental and behavioral abnormalities, which disappeared within 48 hours after the operation.   Conclusion  The postoperative therapeutic effect of STN-DBS surgery for primary Parkinson's disease under general anesthesia is comparable to that of the traditional STN-DBS surgery under local anesthesia. When the operation is performed under general anesthesia, the incidence of surgery and anesthesia-related complications is low if patients are managed strictly, and patients would also experience improved surgical comfort.

 

Keywords: Parkinson's disease, Deep brain stimulation, Subthalamic nucleus, General anesthesia

 

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