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CC BY-NC-ND 4.0 · Asian J Neurosurg 2020; 15(01): 94-97
DOI: 10.4103/ajns.AJNS_223_19
Original Article

Evaluation of the evan's and bicaudate index for rural population in central india using computed tomography

Atul Dhok
Department of Radiology, MGIMS, Sevagram, Wardha, Maharashtra
,
Prasheelkumar Gupta
1   Department of Neurosurgery, MGIMS, Sevagram, Wardha, Maharashtra
,
Salman Shaikh
2   Department of Neurosurgery, Bombay Hospital Institute of Medical Sciences, Mumbai, Maharashtra
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Introduction: Evans index (EI) and Bicaudate index (BCI) are practical markers of ventricular volume and are helpful radiological markers in the diagnosis of normal pressure hydrocephalus. Worldwide, variation exists in normative studies for both these indices. Most of the studies conducted for EI and BCI are based on the Western population data. No study has been performed on the rural population of Central India. The purpose of this study is to develop normative data on EI and BCI that can be extrapolated for future reference. Materials and Methods: This was a retrospective study conducted from December 2018 to May 2019 in MGIMS Hospital, Sevagram, Maharashtra, India, which is a rural hospital in Central India. All patients with either a head injury or neurological complaints although with normal computed tomography (CT) brain were included in the study. Patients with diagnosed neurological disorder, clinical features suggesting hydrocephalus, or intracranial pathology on CT brain were excluded from the study. Five hundred and eleven patients were selected for this study, and EI and BCI was calculated for them. Results: The mean value of EI and BCI in our study was 0.2707 and 0.1121, respectively. Both indices showed a statistically significant difference between males and females. The value of both indices increased with age. Conclusion: Although our study is in agreement with the cutoff value of EI to diagnose dilated lateral ventricles as 0.3 for age <70 years, cutoff value of EI for the older population should be reconsidered to 0.34.

Key-words:

Bicaudate index - Evans index - normal pressure hydrocephalus

Financial support and sponsorship

Nil.




Publication History

Received: 15 July 2019

Accepted: 13 November 2019

Article published online:
16 August 2022

© 2020. Asian Congress of Neurological Surgeons. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/)

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