Liaqat Mahmood Awan, Ejaz Hussain Wadd, Asif Shabir, Khawar Anwar.
Use of Drains Versus No Drains After Burr-Hole Evacuation of Chronic Subdural Hematoma.
Pak J Neuro Surg Jan ;21(4):198-204.

Objectives: To compare the recurrence of chronic subdural hematoma after burr hole evacuation with and without use of subdural drain. Study Design: It was multicenter randomized control trial. Setting: Department of Neurosurgery, SKBZ/CMH Muzaffarabad, Department of Neurosurgery, Lahore General Hospital Lahore. Duration: This study was conducted between June 2017 to December 2017. Inclusion Criteria: Male and female 18-80 years and chronic subdural Hematoma with midline shift of more than 5mm on CT scan. Exclusion Criteria: Bilateral chronic subdural hematoma on CT scan, recurrent CSDH, patients with CSF shunt in-situ, patient with bleeding disorders (INR > 2.5, BT > 7 min, platelet count < 60000) or on anticoagulant drugs, patients with severe systemic ailment like renal failure (Serum Creatinine > 2.5), chronic liver disease (ultrasound shows liver cirrhosis and splenomegaly) and uncontrolled diabetes (BSF > 126) and known ischemic heart disease were excluded from this study. Materials and Methods: In this study, 80 patients were included and randomly divided into two equal groups. Patient fulfilling the inclusion criteria were included in the study through the emergency and outdoor. All Patients were prepared for the surgery and informed consent was taken from all patients. All patients were treated in exactly the same way as per standard ward routine practice except that the treatment option (whether to use the drain or not) was decided through randomization; Group A with drain and Group B without drain. All patients were discharged at 3rd post op day and followed for six months. Results: There were only 16 (20%) patients in which recurrence occurred. Out of these 16 patients 4 (25%) belong to drain group while 12 (75%) belong to without drain group. While in 64 (80%) patients no recurrence was observed [group A: 36 (56.25%) vs. group B: 28 (43.75%)]. The difference between both groups was insignificant, (p-value = 0.235). Conclusion: It was concluded form the results of this study that there is no significant difference between both groups and recurrence will occur whether drain would be placed or not but it was also noticed that rate of recurrence was lower with subdural drain than without drain after burr hole evacuation of chronic subdural hematoma. Some other factor may be involved for recurrence so a long study is required to reach proper conclusion.

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