Comparison of safety of lumbar drain versus external ventricular drain in symptomatic hydrocephalus following aneurysmal subarachnoid hemorrhage

Abstract

Background and objective

Cerebrospinal fluid (CSF) diversion is typically performed with an external ventricular drain (EVD) for symptomatic hydrocephalus (HCP) following subarachnoid hemorrhage (SAH). Lumbar drain (LD) has also been studied to reduce the incidence of vasospasm after SAH but not HCP. We performed a single center retrospective analysis to evaluate the safety of LD versus EVD for symptomatic HCP following aneurysmal SAH in a naturally randomized patient population.

Methods

Patients admitted for aneurysmal SAH who developed symptomatic HCP were treated with EVD or LD depending on neurosurgeon on call. Of the 10 neurosurgeons on call, five would place EVD in all patients while the other five would request LD be placed by interventional neuroradiology; however, the distribution on call was not evenly distributed. We retrospectively compared these two groups for drain complications and outcomes with Modified Rankin Scale (mRS).

Results

From 2018 to 2021, there were a total of 77 patients with aneurysmal SAH requiring CSF diversion for HCP. There were 56 cases of EVD placement and 21 cases of LD placement. Overall drain complications were 32.0% of cases with EVD and 9.5% with LD, p = .0773. EVD versus LD complications consisted of hemorrhage (1.8% vs 0%, p = 1.0000), infection (7.1 vs 0%, p = .5698), clogged (25% vs 0%, p = .008), dislodgement (1.8% vs 4.6%, p = .4737) and replacement (16% vs 4.8%, p = .2698). No case of cerebellar tonsillar herniation occurred. mRS between EVD versus LD obtained at baseline (0.3 vs 0.3, p = .3943), discharge (3.8 vs 2.7, p = .047), 90 days (2.9 vs 2.0, p = .060), and 1 year (2.6 vs 1.6, p = .081). One year mortality rates between EVD versus LD (26.8% vs 19.0%, p = .483).

Conclusion

Symptomatic HCP after aneurysmal SAH can be effectively and safely treated with LD. LD had lower overall complications than EVD with no hemorrhage, infection or malfunction. Further prospective randomized control study may be helpful in elucidating optimal CSF diversion for patients with symptomatic HCP.

Keywords

Lumbar drain external ventricular drain hydrocephalus subarachnoid hemorrhage

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