Abstract：Objective To investigate the influencing factors of postoperative recurrence of chronic subdural hematoma in the elderly patients.Methods The clinical data of 148 elderly patients with chronic subdural hematoma who underwent surgical treatment in the Department of Neurosurgery of Miyun Teaching Hospital of Capital Medical University from January 2015 to December 2020 were retrospectively analyzed,and the related risk factors were statistically analyzed by univariate factor analysis (χ2 test) and logistic regression analysis.Results Of the 148 elderly patients with chronic subhematoma,12 cases (8.11%) had recurrence.Univariate analysis showed that there were significant differences in postoperative widening of subarachnoid space ≥10 mm on one side of the surgical area and postoperative tension pneumocephalus (P＜0.05).While the general factors of patients included age,gender,body mass index,hypertension,diabetes,hyperlipidemia and history of cerebral infarction,perioperative drug-related factors included preoperative antiplatelet therapy,anticoagulant therapy and postoperative statin administration,and surgery-related factors included age,operation time,postoperative drainage volume,postoperative drainage time,and the maximum thickness of preoperative hematoma were not significantly correlated with postoperative hematoma recurrence (P＞0.05).Logistic regression analysis showed that postoperative widening of the submandibular space ≥10 mm on one side of the surgical area and postoperative tension pneumocephalus were closely related to postoperative hematoma recurrence,which were independent risk factors for postoperative hematoma recurrence (P＜0.05).Conclusion Postoperative recurrence in elderly patients with chronic subdural hematoma is associated with postoperative widening of subarachnoid space ≥10 mm on one side of the surgical area and postoperative tension pneumocephalus,both of which are independent risk factors.
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