Abstract
Background
The usage of a drain following evacuation of a chronic subdural haematoma (CSDH) is known to reduce recurrence. In this study we aim to compare the clinical outcomes and recurrence rate of utilising two different types of drains (subperiosteal and subdural drain) following drainage of a CSDH.
Methods
Prospective randomised single-centre study analysing 50 patients who underwent CSDH treatment. Two types of drains, subperiosteal (SPD) and subdural (SDD), were utilised on consecutive alternate patients following burr-hole craniostomy, with a total of 25 patients in each group. The drains were left in for 48-h duration and then removed. The modified Rankin Scale (mRS) was used for outcome measurement at 3 and 6 months.
Results
Data analysis was performed by unpaired t test with Welch’s correction. It was observed that none of the patients in either group had haematoma recurrence during a 6-month follow-up, and a significant difference in outcome was noted at 6 months (p = 0.0118) more than at 3 months (p = 0.0493) according to the statistical analysis. Postoperative seizure and inadvertent placement of the subdural drain into the brain parenchyma were the two complications noted in this study. Anticoagulant use prior to the surgery did not affect the outcome in either group.
Conclusions
We conclude there was no recurrence of CSDH utilising the SDD and SPD following burr-hole craniostomy. The mRS measurement at the 6-month follow-up was found to be statistically significant, with better outcomes with utilisation of the SPD. The SPD may thus prove to be more beneficial than the SDD in the treatment of CSDH. A multi-centre study with a larger group of patients is recommended to reinforce the results from our study.
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Acknowledgments
We would like to thank Dr ArunKumar, HS, Research Scientist, UCC, Cork, Republic of Ireland, for statistical analysis. We are indebted to all the patients who played a key role in this study. We are grateful to the general practitioners and nursing Home staff for the postoperative care along with the neurosurgical staff of Cork University Hospital, Cork.
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Comment
Even if very common in neurosurgical practice, the surgical management of chronic subdural hematomas (CSDH) is still controversial. Different neurosurgical centers use different surgical techniques, in many cases with comparable results. In many institutions the theoretical risk of cortical damage or injury of a bridging vein represents a hindrance to the extensive use of subdural drainages in CSDH. A randomized study in 2009 [Lancet. 2009 Sep 26;374(9695):1067–73] stated that the insertion of a drain is associated with reduced recurrence and mortality. Other groups, such as Gazzeri et al., Bellut et al. and Zumofen et al., advocated the efficacy and safety of subperiosteal drainage (SPD) compared to subdural drainage (SDD). However, at present there is a lack of prospective randomized comparative studies in this field.
In this single-center prospective randomized study, the authors compared both SDD and SPD and measured the clinical outcome at 3- and 6-month intervals postoperatively. Moreover, they analyzed the role of anticoagulation therapy prior to surgery. The study was well conducted and described, and is of clinical relevance. The preliminary results indicate that the use of drainage is effective and safe and that an SPD—connected with a suction system—presents better long-term results compared to a SDD, and that using an anticoagulant prior to surgery did not influence the outcome or recurrence. The greatest limitation is the small number of subjects studied. Further randomized studies with larger groups of patients are anticipated to provide more evidence of the benefit of an SPD in the surgical management of CSDH.
Alex Alfieri
Sebastian Simmermacher
Halle-Wittenberg, Halle (Saale), Germany
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Kaliaperumal, C., Khalil, A., Fenton, E. et al. A prospective randomised study to compare the utility and outcomes of subdural and subperiosteal drains for the treatment of chronic subdural haematoma. Acta Neurochir 154, 2083–2089 (2012). https://doi.org/10.1007/s00701-012-1483-1
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DOI: https://doi.org/10.1007/s00701-012-1483-1