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Glissonian approach has been described as a selective vascular clamping procedure during hepatectomy based on external anatomical landmarks. Anatomical variations of the right Glissonian pedicle have been identified with an increased risk of clamping failure during Glissonian approach. The objective of this study was to characterize the anatomical variations of the right Glissonian pedicle at risk of clamping failure during right hepatectomy. This was a retrospective analysis of abdominal multiphasic CT and routine 3D reconstruction (n = 346). Anatomical variations at risk of clamping failure were Types 1 to 3 (Madoff's classification) and an angle of less than 50° between the portal vein and the left portal vein. Primary objective was the risk of right Glissonian pedicle clamping failure. Secondary objectives were the rate of normal anatomy, the rate of variations, and the rate of incomplete or extended clamping. Normal anatomy was found in 245 patients (71%). Anatomical variations were as follows: Type 1: 11%, Type 2: 17%, Type 3: 0.8%, Type 4: 0%. Angle variation less than 50° was observed in 4.5%. The risk of selective clamping failure was 34%. Extension of clamping was observed in 16%, while incomplete clamping was observed in 17.8%. Failure of right Glissonian pedicle clamping was predictable in 34% of cases while 71% of patients presented normal portal vein anatomy. Clin. Anat. 32:328-336, 2019. © 2018 Wiley Periodicals, Inc.

Glissonian approach has been described as a selective vascular clamping procedure during hepatectomy based on external anatomical landmarks. Anatomical variations of the right Glissonian pedicle have been identified with an increased risk of clamping failure during Glissonian approach. The objective of this study was to characterize the anatomical variations of the right Glissonian pedicle at risk of clamping failure during right hepatectomy. This was a retrospective analysis of abdominal multiphasic CT and routine 3D reconstruction (n = 346). Anatomical variations at risk of clamping failure were Types 1 to 3 (Madoff's classification) and an angle of less than 50° between the portal vein and the left portal vein. Primary objective was the risk of right Glissonian pedicle clamping failure. Secondary objectives were the rate of normal anatomy, the rate of variations, and the rate of incomplete or extended clamping. Normal anatomy was found in 245 patients (71%). Anatomical variations were as follows: Type 1: 11%, Type 2: 17%, Type 3: 0.8%, Type 4: 0%. Angle variation less than 50° was observed in 4.5%. The risk of selective clamping failure was 34%. Extension of clamping was observed in 16%, while incomplete clamping was observed in 17.8%. Failure of right Glissonian pedicle clamping was predictable in 34% of cases while 71% of patients presented normal portal vein anatomy. Clin. Anat. 32:328-336, 2019. © 2018 Wiley Periodicals, Inc.

National audience; le cinquième chapitre a pour vocation de présenter une liste de préconisations à destination des organisateurs d’événements équestres pour optimiser les retombées de leurs manifestations. Ces recommandations sont issues des résultats des études présentées dans le chapitre 3.

National audience; Ce troisième chapitre est dédié à la présentation des résultats obtenus lors des tests de la méthode, menés de 2011 à 2013 sur des événements équestres de petite et moyenne dimensions et de disciplines variées.

National audience; Comme cela a été exposé dans le chapitre I, les méthodes d'évaluation d'impacts sont nombreuses et variées, chacune présentant des avantages et inconvénients. Ce chapitre détaille les méthodes finalement retenues dans nos études d'impact, nos choix ayant été dictés par un objectif de justesse et de précision, afin que nos estimations se rapprochent le plus possible de la réalité, mais aussi par des contraintes pratiques de terrain.