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Master Thesis

Dépistage du risque lithiasique rénal après bypass gastrique : évaluation par un questionnaire

Abstract : Introduction. Gastric bypass operations have significantly increased in recent years. The surgery raises the risk of kidney stone formation versus persons who have not undergone the surgery. Our study aims to set up a screening questionnaire in order to assess the lithiasis risk among operated patients. Material and method. Our report consist of a monocentric clinical study with a screening questionnaire destinated to people who have undergone gastric bypass surgery between 2014 and 2015. Patients were asked to answer 22 questions divided into 4 parts : history, episodes of renal colic before and after bypass surgery and eating habits. Results. We included 143 patients, all agreed to answer our questions. The average age on the questionnaire is 49,1 ±10,8 years. The time between gastric bypass surgery and the moment when patients have been asked to fill in the questionnaire is 50,8 ±5,0 months. The results of our statistical analyses are as follows. ROC curves shows an AUC of 0,932±0,029 (p<0,001). We found a line ≥6, a sensitivity of 92.9%, a specificity of 76.5%, a predictive value positive of 49.1% and negative of 97.8%. The prevalence of kidney stones in our population reaches 19.6%. In the context of screening, it appears that the questionnaire can be used in populations where prevalence can take values of up to 70%. Conclusion. We have built up a reliable and short questionnaire to screen patients with high risk level of renal calculus after gastric bypass.
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Submitted on : Thursday, September 10, 2020 - 9:54:23 AM
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Marie Tran. Dépistage du risque lithiasique rénal après bypass gastrique : évaluation par un questionnaire. Médecine humaine et pathologie. 2020. ⟨dumas-02935160⟩



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