Background:
Chronic subdural hematoma (CSDH) is predominantly a disease of the elderly. On accounting its risk-to-benefit ratio, there was always controversy regarding the management of the CSDH as to which procedure is superior.
Aims:
The aim is to compare the clinical and radiological outcomes in patients of CSDH who have undergone single burr-hole craniostomy (BHC) versus twist-drill craniostomy (TDC).
Patients and Methods:
A retrospective study was conducted in patients admitted with CSDH who had undergone single BHC or TDC between January 2014 and December 2016. Patients between 18 and 90 years of age were selected. Patients with CSDH showing computed tomography (CT) scan findings of homogeneous hypodensity, homogeneous isodensity, and mixed density were selected. CT scan findings of CSDH with hyperdense gravity-dependent fluid level were also selected. Patients with CT evidence of multiple septations were excluded from the study. Recurrent CSDH, bilateral CSDH, and CSDH with secondary acute bleed were also excluded. Diagnosis was done using noncontrast CT scan. The maximum thickness of the CSDH was measured in the axial film of CT scan. The presence of midline shift (MLS) was measured as any deviation of the septum pellucidum from the midline in axial CT film. The mass effect was determined by the effacement of the sulci, sylvian fissure obscuration, or compression of lateral ventricles. The decrease in the signs and symptoms in postoperative period was considered as the postoperative clinical improvement. Improvement in the postoperative CT scan was determined by the decrease in the thickness of CSDH and absence of the MLS with decrease in the mass effect. The presence of the CSDH with mass effect and MLS was considered as the significant residue in the postoperative CT scan. Patients with significant residue underwent reoperation.
Results:
There were 63 patients in BHC group and 46 patients in TDC group. The mean age in BHC and TDC groups was 61.39 ± 13.21 standard deviation (SD) and 73.36 ± 10.82 SD, respectively. There were 48 (76.19%) male and 15 (23.81%) female in BHC group. There were 32 (69.57%) male and 14 (30.43%) female in TDC group. In BHC group, 41.27% were on the right side and 58.73% on the left side. In TDC group, 50% were on the right side and 50% on the left side. In BHC group, 82.54% were in the frontotemporoparietal region, 9.52% in the frontoparietal region, 6.35% in the temporoparietal region and 1.58% in the parietooccipital region. In TDC group, 86.95% were in the frontotemporoparietal region, 8.69% in the frontoparietal region, 2.17% in the temporoparietal region, and 2.17% in the parietooccipital region. There was no significant difference in duration of symptoms and history of trauma in both the groups. The symptoms of the patients in BHC versus TDC include weakness of the limbs (44.44% vs. 73.91%), headache (50.79% vs. 32.60%), altered sensorium or decreased memory (44.44% vs....