Clinical Features and Management of Seizure After Percutaneous Endoscopic Spine Surgery: A Retrospective Case Series Analysis

-OBJECTIVE: To describe the perioperative clinical fea-tures, management, and outcomes of patients with seizure after percutaneous endoscopic spine surgery (PESS). -METHODS: Patients who experienced seizure after PESS in a tertiary orthopedic hospital between January 2016 and June 2022 were retrospectively recruited, and patient charts were reviewed. -RESULTS: Twenty-nine patients were recruited, and the incidence of seizure after PESS was 0.52%. The operation time was 110.0 minutes (interquartile range [IQR], 82.5- 235.0 minutes) and the irrigation speed was 109.0 mL/min-ute (IQR, 86.5-145.5 mL/minute). Definitive dural tears were reported in 15 patients (51.7%). In addition to agitation and myotonia, significant increased respiratory rate (29.9 +/- 6.5 breaths/minute), tachycardia (112.1 +/- 20.6 beats/minute), and hypertension (systolic, 189.5 +/- 21.9 mm Hg; diastolic, 98.3 +/- 10.6 mm Hg) were observed. Arterial blood gas analysis showed hypocapnia, metabolic acidosis, and hyperlactatemia. All patients received analgesia and sedation as well as hyperosmolar therapy. The estimated duration of seizure was 3.0 hours (IQR, 2.5-4.0 hours) and the postoperative length of hospital stay was 3.0 (IQR, 3.0- 5.5) days. The Japanese Orthopaedic Association score and visual analog scale score improved markedly within 6 months after surgery. -CONCLUSIONS: Despite the low incidence and short duration, seizure after PESS should be considered a critical and urgent syndrome. Management strategies for seizure mainly involve intensive care, securing the airway, anal-gesia and sedation, hyperosmolar therapy, and negative fluid balance. No significant adverse effects of seizure on clinical outcomes were observed during 6 months of follow-up.