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Computerized tomographic study of normal Evans index in adult Nigerians
BACKGROUND: The evaluation of degree of ventricular enlargement should be based on established indices rather than on personal experience as this is highly subjective. Our aim was to establish normal values for Evans index in a Nigerian adult population as none has been found in the Nigerian medical...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Medknow Publications & Media Pvt Ltd
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4244789/ https://www.ncbi.nlm.nih.gov/pubmed/25552852 http://dx.doi.org/10.4103/0976-3147.143195 |
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author | Hamidu, Ahmed Umdagas Olarinoye-Akorede, Sefiya Adebanke Ekott, David Solomon Danborno, Barnabas Mahmud, Muhammad Raj Balogun, Muhammad Shakir |
author_facet | Hamidu, Ahmed Umdagas Olarinoye-Akorede, Sefiya Adebanke Ekott, David Solomon Danborno, Barnabas Mahmud, Muhammad Raj Balogun, Muhammad Shakir |
author_sort | Hamidu, Ahmed Umdagas |
collection | PubMed |
description | BACKGROUND: The evaluation of degree of ventricular enlargement should be based on established indices rather than on personal experience as this is highly subjective. Our aim was to establish normal values for Evans index in a Nigerian adult population as none has been found in the Nigerian medical literature. MATERIALS AND METHODS: Axial computerized tomographic brain scans of 488 normal subjects were reviewed retrospectively. Of them, 319 (65.36%) of the patients were males and 169 (34.63%) were females; their ages ranged from 18 to 84 years with a mean age of 37.26 years. The images were acquired using a multi-slice GE Sigma excite scanner. Evans index was measured as the linear ratio of the total width of the frontal horns of the cerebral lateral ventricles to the maximum intracranial diameter. RESULTS: The mean value for Evans index for the studied population was 0.252 ± 0.04. The EI increased with age and it was slightly higher among males. The difference in Evans value in males and females was not statistically significant. Individuals above 60 years old had the highest Evans values in both sexes. CONCLUSION: This study has established ranges of normal value for Evans index in a Nigerian population. It agrees with the diagnostic cut-off value of > 0.3 for hydrocephalus and it compares well with that of the Caucasians. |
format | Online Article Text |
id | pubmed-4244789 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | Medknow Publications & Media Pvt Ltd |
record_format | MEDLINE/PubMed |
spelling | pubmed-42447892015-01-01 Computerized tomographic study of normal Evans index in adult Nigerians Hamidu, Ahmed Umdagas Olarinoye-Akorede, Sefiya Adebanke Ekott, David Solomon Danborno, Barnabas Mahmud, Muhammad Raj Balogun, Muhammad Shakir J Neurosci Rural Pract Original Article BACKGROUND: The evaluation of degree of ventricular enlargement should be based on established indices rather than on personal experience as this is highly subjective. Our aim was to establish normal values for Evans index in a Nigerian adult population as none has been found in the Nigerian medical literature. MATERIALS AND METHODS: Axial computerized tomographic brain scans of 488 normal subjects were reviewed retrospectively. Of them, 319 (65.36%) of the patients were males and 169 (34.63%) were females; their ages ranged from 18 to 84 years with a mean age of 37.26 years. The images were acquired using a multi-slice GE Sigma excite scanner. Evans index was measured as the linear ratio of the total width of the frontal horns of the cerebral lateral ventricles to the maximum intracranial diameter. RESULTS: The mean value for Evans index for the studied population was 0.252 ± 0.04. The EI increased with age and it was slightly higher among males. The difference in Evans value in males and females was not statistically significant. Individuals above 60 years old had the highest Evans values in both sexes. CONCLUSION: This study has established ranges of normal value for Evans index in a Nigerian population. It agrees with the diagnostic cut-off value of > 0.3 for hydrocephalus and it compares well with that of the Caucasians. Medknow Publications & Media Pvt Ltd 2015 /pmc/articles/PMC4244789/ /pubmed/25552852 http://dx.doi.org/10.4103/0976-3147.143195 Text en Copyright: © Journal of Neurosciences in Rural Practice http://creativecommons.org/licenses/by-nc-sa/3.0 This is an open-access article distributed under the terms of the Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Original Article Hamidu, Ahmed Umdagas Olarinoye-Akorede, Sefiya Adebanke Ekott, David Solomon Danborno, Barnabas Mahmud, Muhammad Raj Balogun, Muhammad Shakir Computerized tomographic study of normal Evans index in adult Nigerians |
title | Computerized tomographic study of normal Evans index in adult Nigerians |
title_full | Computerized tomographic study of normal Evans index in adult Nigerians |
title_fullStr | Computerized tomographic study of normal Evans index in adult Nigerians |
title_full_unstemmed | Computerized tomographic study of normal Evans index in adult Nigerians |
title_short | Computerized tomographic study of normal Evans index in adult Nigerians |
title_sort | computerized tomographic study of normal evans index in adult nigerians |
topic | Original Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4244789/ https://www.ncbi.nlm.nih.gov/pubmed/25552852 http://dx.doi.org/10.4103/0976-3147.143195 |
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