Cargando…
Usefulness of measuring renal papillae in Hounsfield units in stone - forming patients
INTRODUCTION: The aim of this work is to study the density of the renal papillae in stone-forming patients and to determine its usefulness. MATERIALS AND METHODS: This study included a total of 79 patients diagnosed with renal stones and on whom a computed tomography without contrast was performed f...
Autores principales: | , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Sociedade Brasileira de Urologia
2016
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5066894/ https://www.ncbi.nlm.nih.gov/pubmed/27622277 http://dx.doi.org/10.1590/S1677-5538.IBJU.2015.0686 |
_version_ | 1782460559943270400 |
---|---|
author | Arrabal-Polo, Miguel Angel Cano-Garcia, Maria del Carmen Huerta-Brunel, Juan Esteban Hidalgo-Agullo, Guillermo Roletto-Salmo, Luis Arrabal-Martín, Miguel |
author_facet | Arrabal-Polo, Miguel Angel Cano-Garcia, Maria del Carmen Huerta-Brunel, Juan Esteban Hidalgo-Agullo, Guillermo Roletto-Salmo, Luis Arrabal-Martín, Miguel |
author_sort | Arrabal-Polo, Miguel Angel |
collection | PubMed |
description | INTRODUCTION: The aim of this work is to study the density of the renal papillae in stone-forming patients and to determine its usefulness. MATERIALS AND METHODS: This study included a total of 79 patients diagnosed with renal stones and on whom a computed tomography without contrast was performed from June 2014 to May 2015. The patients were divided into two groups: Group 1 (single episode) included 43 patients, and Group 2 (recurrent episodes) included 36 patients. The density of six renal papillae (3 per kidney) was measured, and the means obtained were compared between Groups 1 and 2. Statistical analysis was performed using SPSS 20.0. RESULTS: The mean papillary density in Group 1 was 32.26 (SD 4.07) HU compared to 42.36 (SD 8.03) HU in Group 2 (P=00001). A ROC curve was constructed, obtaining an optimal cut-off point of 36.8HU [area under the curve, 0.881 (95% CI; 0.804-0.958); P=0001], with a sensitivity of 80% and a specificity of 90%. The relative risk was estimated at 40.3 (95% CI; 10.8-151.1), meaning that a patient with a mean papillary density greater than 36.8HU would have a 40 times greater risk of having recurrent renal stones. The positive predictive value (PPV) was 81% and the negative predictive value (NPV) was 90%. CONCLUSION: The measurement of renal papillary density could be useful in predicting recurrent stone-formers. These results need to be confirmed in future studies with a greater number of patients and a longer follow-up. |
format | Online Article Text |
id | pubmed-5066894 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Sociedade Brasileira de Urologia |
record_format | MEDLINE/PubMed |
spelling | pubmed-50668942016-10-20 Usefulness of measuring renal papillae in Hounsfield units in stone - forming patients Arrabal-Polo, Miguel Angel Cano-Garcia, Maria del Carmen Huerta-Brunel, Juan Esteban Hidalgo-Agullo, Guillermo Roletto-Salmo, Luis Arrabal-Martín, Miguel Int Braz J Urol Original Article INTRODUCTION: The aim of this work is to study the density of the renal papillae in stone-forming patients and to determine its usefulness. MATERIALS AND METHODS: This study included a total of 79 patients diagnosed with renal stones and on whom a computed tomography without contrast was performed from June 2014 to May 2015. The patients were divided into two groups: Group 1 (single episode) included 43 patients, and Group 2 (recurrent episodes) included 36 patients. The density of six renal papillae (3 per kidney) was measured, and the means obtained were compared between Groups 1 and 2. Statistical analysis was performed using SPSS 20.0. RESULTS: The mean papillary density in Group 1 was 32.26 (SD 4.07) HU compared to 42.36 (SD 8.03) HU in Group 2 (P=00001). A ROC curve was constructed, obtaining an optimal cut-off point of 36.8HU [area under the curve, 0.881 (95% CI; 0.804-0.958); P=0001], with a sensitivity of 80% and a specificity of 90%. The relative risk was estimated at 40.3 (95% CI; 10.8-151.1), meaning that a patient with a mean papillary density greater than 36.8HU would have a 40 times greater risk of having recurrent renal stones. The positive predictive value (PPV) was 81% and the negative predictive value (NPV) was 90%. CONCLUSION: The measurement of renal papillary density could be useful in predicting recurrent stone-formers. These results need to be confirmed in future studies with a greater number of patients and a longer follow-up. Sociedade Brasileira de Urologia 2016 /pmc/articles/PMC5066894/ /pubmed/27622277 http://dx.doi.org/10.1590/S1677-5538.IBJU.2015.0686 Text en http://creativecommons.org/licenses/by/4.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Original Article Arrabal-Polo, Miguel Angel Cano-Garcia, Maria del Carmen Huerta-Brunel, Juan Esteban Hidalgo-Agullo, Guillermo Roletto-Salmo, Luis Arrabal-Martín, Miguel Usefulness of measuring renal papillae in Hounsfield units in stone - forming patients |
title | Usefulness of measuring renal papillae in Hounsfield units in stone - forming patients |
title_full | Usefulness of measuring renal papillae in Hounsfield units in stone - forming patients |
title_fullStr | Usefulness of measuring renal papillae in Hounsfield units in stone - forming patients |
title_full_unstemmed | Usefulness of measuring renal papillae in Hounsfield units in stone - forming patients |
title_short | Usefulness of measuring renal papillae in Hounsfield units in stone - forming patients |
title_sort | usefulness of measuring renal papillae in hounsfield units in stone - forming patients |
topic | Original Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5066894/ https://www.ncbi.nlm.nih.gov/pubmed/27622277 http://dx.doi.org/10.1590/S1677-5538.IBJU.2015.0686 |
work_keys_str_mv | AT arrabalpolomiguelangel usefulnessofmeasuringrenalpapillaeinhounsfieldunitsinstoneformingpatients AT canogarciamariadelcarmen usefulnessofmeasuringrenalpapillaeinhounsfieldunitsinstoneformingpatients AT huertabruneljuanesteban usefulnessofmeasuringrenalpapillaeinhounsfieldunitsinstoneformingpatients AT hidalgoagulloguillermo usefulnessofmeasuringrenalpapillaeinhounsfieldunitsinstoneformingpatients AT rolettosalmoluis usefulnessofmeasuringrenalpapillaeinhounsfieldunitsinstoneformingpatients AT arrabalmartinmiguel usefulnessofmeasuringrenalpapillaeinhounsfieldunitsinstoneformingpatients |