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  • 1
    ISSN: 1279-8517
    Keywords: Infrarenal vena cava ; Biometry of vena cava ; Transvenous vena cava filter ; Phlebocavography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé L'utilisation de filtre cave endoveineux pour prévenir une récidive d'embolie pulmonaire est devenue d'un usage courant. Cependant peu de travaux ont été faits sur le diamètre de la veine cave inférieure infrarénale (IIVC) où l'appareil est généralement situé. Cette étude a pour but d'étudier le diamètre transversal de la VCI sousrénale (VCISR) à partir de 100 cavographies réalisées dans des conditions techniques identiques. Le diamètre moyen de la VCISR est de 20.9 mm (extrême 12–27 mm) dans sa partie moyenne et de 21.3 mm (extrême 10–31 mm) au niveau de sa terminaison. La longueur moyenne de la VCISR est de 96 mm (extrême 80,3–142 mm). L'âge, le sexe, la taille, le poids, la surface corporelle n'influencent pas les dimensions de la VCISR. Il existe une différence statistiquement significative de l'abouchement de la v. rénale gauche entre les sujets ayant une arthrose lombaire et ceux qui en sont dépourvus. La cavographie reste un examen de base en matière d'exploration de la VCI. La connaissance des variations des dimensions de la VCISR qu'elle apporte est donc indispensable. L'intérêt de cette étude est cependant limité par le fait que l'image radiologique correspond en réalité à la projection du diamètre transversal réel. Des études complémentaires utilisant en particulier la tomodensitométrie sont donc nécessaire pour préciser une éventuelle relation entre le diamètre réel et le diamètre mesuré par cavographie.
    Notes: Summary Placement of a transvenous vena cava filter has became a common way to control recurrent pulmonary embolism. However few studies have been reported on the diameter of the infrarenal inferior vena cava (IIVC) where the device is usually placed. This study based upon 100 cavographies has showed the calculated average diameter of IIVC was 20.9 mm (range 12–27 mm) in its middle part and 21.3 mm (range 10–31 mm) in its terminal end. The calculated average IIVC length was 96 mm (range 80.3–142 mm). There was no statistical correlation between caval size and age, sex, height, weight and corporeal area. There was a statistical difference of left renal vein location between patients presenting with lumbar arthrosis and those without. We discuss different methods to measure IIVC in particular tomodensitometry. CT scans reviewed in our department show that the largest diameter of IIVC is not in a frontal plane and that the width seen on cavography is the projection of the largest diameter on the film. Therefore, the range of the real caval diameters is greater than indicated above.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1279-8517
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1615-5947
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Adams-DeWeese caval clips have been shown to be effective in preventing pulmonary embolism. However, the use of Teflon clips constitutes a permanent solution for this transient risk. We tested an absorbable caval clip made of currently available synthetic biodegradable polymers in five female Beagle dogs. The polymer used was PLA 96 containing 96%L lactic acid and 4%D lactic acid. After placement through a laparotomy, clips were routinely inspected and samples of the material were collected at regular intervals between 3 and 19 months postoperatively. The characteristics of absorption of PLA 96 in the retroperitoneal space were the same as those previously described in the literature. The clip retained its shape, rigidity, and effectiveness for 7 months. Complete degradation of the clip took between 18 and 19 months. Absorption did not cause a major inflammatory reaction and had no thrombogenic effect. Given the small number of animals studied, these results must be considered preliminary.
    Type of Medium: Electronic Resource
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