{"id":1366,"date":"2022-12-29T11:28:58","date_gmt":"2022-12-29T10:28:58","guid":{"rendered":"https:\/\/www.cipad.fr\/?p=1366"},"modified":"2025-09-17T12:17:46","modified_gmt":"2025-09-17T10:17:46","slug":"quest-ce-quun-produit-de-contraste","status":"publish","type":"post","link":"https:\/\/cipad.fr\/index.php\/2022\/12\/29\/quest-ce-quun-produit-de-contraste\/","title":{"rendered":"Qu\u2019est ce qu\u2019un produit de contraste ?"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"1366\" class=\"elementor elementor-1366\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-d4c8d70 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"d4c8d70\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-3684850\" data-id=\"3684850\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-c7fc20f elementor-widget elementor-widget-heading\" data-id=\"c7fc20f\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Le liquide de contraste<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d79e78c elementor-widget elementor-widget-text-editor\" data-id=\"d79e78c\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\tC\u2019est une substance injectable ou ing\u00e9rable qui am\u00e9liore la visualisation des organes explor\u00e9s.<br><br>\nIl existe plusieurs cat\u00e9gories de produit de contraste. Les plus utilis\u00e9s actuellement sont les produits de contraste iod\u00e9s (PCI) et les produits de contraste gadolin\u00e9s (PCG) utilis\u00e9s en IRM. Depuis peu un produit de contraste gazeux est utilis\u00e9 en \u00e9chographie.Les plus anciens de ces produits de contraste sont ceux utilis\u00e9s pour l\u2019exploration du tube digestif \u00e0 base de sulfate de baryum.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d0b632a elementor-widget elementor-widget-image\" data-id=\"d0b632a\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"279\" src=\"https:\/\/cipad.fr\/wp-content\/uploads\/2022\/12\/contraste-cipad-1024x279.png\" class=\"attachment-large size-large wp-image-1400\" alt=\"\" srcset=\"https:\/\/cipad.fr\/wp-content\/uploads\/2022\/12\/contraste-cipad-1024x279.png 1024w, https:\/\/cipad.fr\/wp-content\/uploads\/2022\/12\/contraste-cipad-600x164.png 600w, https:\/\/cipad.fr\/wp-content\/uploads\/2022\/12\/contraste-cipad-300x82.png 300w, https:\/\/cipad.fr\/wp-content\/uploads\/2022\/12\/contraste-cipad-768x209.png 768w, https:\/\/cipad.fr\/wp-content\/uploads\/2022\/12\/contraste-cipad.png 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c3e4305 elementor-widget elementor-widget-heading\" data-id=\"c3e4305\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Les mesures \u00e0 respecter<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-10709b9 elementor-widget elementor-widget-text-editor\" data-id=\"10709b9\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Pour que votre examen radiologique se passe le mieux possible et pour que le r\u00e9sultat soit fiable, voici quelques consignes \u00e0 respecter :<br \/><br \/><\/p><ol><li>Avertir au moment de la prise de rendez-vous si vous avez d\u00e9j\u00e0 fait une r\u00e9action allergique lors d&rsquo;un examen pr\u00e9c\u00e9dent avec produit de contraste, et apporter tous les documents en votre possession concernant cet incident.<\/li><li>Compte-rendu de l&rsquo;examen avec mention du produit de contraste.<\/li><li>Tests allergologiques et carte d&rsquo;allergie.<\/li><li>Apporter les r\u00e9sultats sanguins concernant la fonction r\u00e9nale en cas de facteur de risque (insuffisance r\u00e9nale).<\/li><li>Pr\u00e9venir d&rsquo;un examen avec injection de produit de contraste dans les 48h pr\u00e9c\u00e9dentes.<\/li><li>Pr\u00e9venir d&rsquo;un \u00e9ventuel traitement anti-diab\u00e9tique par Metformine.<\/li><\/ol>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9687122 elementor-widget elementor-widget-heading\" data-id=\"9687122\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Cas particulier chez la femme enceinte<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5e8141f elementor-widget elementor-widget-text-editor\" data-id=\"5e8141f\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>L&rsquo;injection d&rsquo;un agent de contraste IRM n&rsquo;est pas recommand\u00e9e mais peut \u00eatre r\u00e9alis\u00e9e apr\u00e8s appr\u00e9ciation du rapport b\u00e9n\u00e9fice\/risque. Les produits iod\u00e9s peuvent \u00eatre inject\u00e9s en cas d&rsquo;absolue n\u00e9cessit\u00e9 (recherche d&#8217;embolie pulmonaire par exemple), mais il faut absolument en avertir le p\u00e9diatre apr\u00e8s la naissance de l&rsquo;enfant, car le seul risque est celui d&rsquo;un dysfonctionnement de la thyro\u00efde du foetus.<br \/><br \/>De m\u00eame si des examens d&rsquo;imagerie avec produits de contraste iod\u00e9 sont r\u00e9alis\u00e9s chez une femme allaitante il faut interrompre cet allaitement durant 48h, car l&rsquo;iode passe dans le lait et peut agir sur la thyro\u00efde du b\u00e9b\u00e9. Par contre il semble ne pas avoir de risque avec le Gadolinium.<br \/><br \/><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-48ca0f8 elementor-widget elementor-widget-heading\" data-id=\"48ca0f8\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Les diff\u00e9rents types de produits de contraste<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-38d408c elementor-widget elementor-widget-heading\" data-id=\"38d408c\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Les produits de contraste Iod\u00e9s<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fbf9fdb elementor-widget elementor-widget-text-editor\" data-id=\"fbf9fdb\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Ces produits de contraste contiennent de l\u2019iode qui les rend visibles aux Rayons X.<\/p>\n<p>Ce sont des produits inject\u00e9s le plus souvent par voie veineuse (pose d\u2019un cath\u00e9ter au niveau d\u2019une veine du bras) ils sont alors transport\u00e9s par le sang jusqu\u2019\u00e0 l\u2019organe \u00e0 explorer.<\/p>\n<p>Bien plus rarement, ils sont inject\u00e9s :<\/p>\n<ul>\n<li>par voie art\u00e9rielle : \u00ab art\u00e9riographie \u00bb, par exemple \u00ab coronarographie \u00bb pour \u00e9tudier les vaisseaux du c\u0153ur.<\/li>\n<li>dans une articulation : \u00ab arthrographie \u00bb<\/li>\n<li>par l\u2019interm\u00e9diaire d\u2019une petite sonde directement dans l\u2019ut\u00e9rus \u00ab hyst\u00e9rosalpingographie \u00bb ou dans la vessie \u00ab cystographie \u00bb.<\/li>\n<\/ul>\n<p>Quand ils sont inject\u00e9s dans une veine ou une art\u00e8re, ils sont \u00e9limin\u00e9s par les reins, raison pour laquelle il est recommand\u00e9 de boire abondamment avant et apr\u00e8s l\u2019examen.<\/p>\n<p>Potentiellement, ils pr\u00e9sentent deux inconv\u00e9nients qui seront pris en compte :<\/p>\n<ul>\n<li>Ils peuvent \u00eatre allergisants. En cas de r\u00e9action allergique av\u00e9r\u00e9e lors d\u2019un examen ant\u00e9rieur, vous avez peut-\u00eatre consult\u00e9 un allergologue qui au moyen de tests cutan\u00e9s a pu d\u00e9terminer le ou les PCI que vous ne tol\u00e9rez pas. Rares sont les personnes \u00ab allergiques \u00bb \u00e0 tous les PCI. Si vous avez \u00e9t\u00e9 test\u00e9, apportez le r\u00e9sultat des tests au radiologue qui vous prescrira le produit de contraste qui vous convient. Si vous n\u2019avez pas fait de test, il est important de signifier, au moment de la prise de rendez-vous, que vous avez d\u00e9j\u00e0 eu une r\u00e9action allergique et si possible de pr\u00e9ciser le PCI en cause, le radiologue d\u00e9cidera alors du d\u00e9roulement de l&rsquo;examen.<\/li>\n<li>L\u2019autre inconv\u00e9nient de ces PCI est qu\u2019ils n\u00e9cessitent un bon fonctionnement des reins. C\u2019est pourquoi il vous sera demand\u00e9 de faire des examens de sang avant l\u2019examen et \u00e0 plus forte raison si vous avez des facteurs de risque (\u00e2ge, hypertension art\u00e9rielle, diab\u00e8te\u2026). En cas de risque confirm\u00e9, il peut vous \u00eatre propos\u00e9 de remplacer l\u2019examen radiologique avec produit de contraste par un examen \u00e9chographique ou IRM.<\/li>\n<\/ul>\n<p>Il peut y avoir \u00e9galement un risque si vous avez pass\u00e9 un examen radiographique avec injection de produit de contraste iod\u00e9 dans les 48h pr\u00e9c\u00e9dentes. Dans ce cas, il faut toujours en avertir le radiologue au moment de l\u2019examen, afin de le diff\u00e9rer d\u2019un ou deux jours si ce nouvel examen n\u2019est pas urgent.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c87057e elementor-widget elementor-widget-heading\" data-id=\"c87057e\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Les produits de contraste Gadolin\u00e9s<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a50a8be elementor-widget elementor-widget-text-editor\" data-id=\"a50a8be\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\tIls sont \u00e9galement utilis\u00e9s par injection intraveineuse dans une veine p\u00e9riph\u00e9rique du bras. Le contraste est apport\u00e9 ici par le gadolinium qui est spontan\u00e9ment visible en IRM.<br><br>\nComme les PCI, les PCG peuvent \u00eatre \u00e0 l\u2019origine de r\u00e9actions allergiques vraies, \u00e9galement bien connues et prises en charge par l\u2019unit\u00e9 d\u2019IRM ; et comme pour les PCI des tests allergologiques peuvent et doivent \u00eatre r\u00e9alis\u00e9s afin d\u2019\u00e9liminer ult\u00e9rieurement l\u2019utilisation de produit que vous ne supportez pas.<br><br>\nLes PCG peuvent \u00e9galement avoir un effet nocif sur les reins, le risque n\u2019existe qu\u2019en cas d\u2019insuffisance r\u00e9nale av\u00e9r\u00e9e, et le plus souvent chez des patients dialys\u00e9s ou suivis en n\u00e9phrologie. C\u2019est la raison pour laquelle, en pr\u00e9sence de facteurs de risques, il peut vous \u00eatre demand\u00e9 de pratiquer une prise de sang avant l\u2019examen et en cas de doute le radiologue discutera avec votre n\u00e9phrologue de l\u2019opportunit\u00e9 de cet examen IRM et de la n\u00e9cessit\u00e9 de l\u2019injection de gadolinium.<br><br>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e552064 elementor-widget elementor-widget-heading\" data-id=\"e552064\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Les produits de contraste Baryt\u00e9s<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-89c768c elementor-widget elementor-widget-text-editor\" data-id=\"89c768c\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\tCe sont des produits \u00e0 tr\u00e8s haut contraste utilis\u00e9s d\u00e8s le d\u00e9but de la radiologie m\u00e9dicale pour examiner les organes digestifs (\u0153sophage, estomac, intestin et c\u00f4lon) qui ne sont pas visibles spontan\u00e9ment pour un diagnostic sur des radiographies standards.\n<br><br>\nPour le haut appareil digestif (transit oeso-gastro-duod\u00e9nal, transit du gr\u00eale), ces produits seront ing\u00e9r\u00e9s et leur passage \u00e0 travers le tube digestif sera suivi en scopie avec r\u00e9alisation de clich\u00e9s sur les zones \u00e0 examiner.\n<br><br>\nPour le c\u00f4lon (lavement baryt\u00e9), le produit de contraste baryt\u00e9 sera introduit directement sous pression douce apr\u00e8s mise en place d\u2019une sonde dans le rectum. Dans ce cas \u00e9galement la progression du contraste \u00e0 contre-courant dans le c\u00f4lon sera suivie en scopie et des clich\u00e9s seront r\u00e9alis\u00e9s sur les zones anormales.\n<br><br>\nL\u2019utilisation de ces produits baryt\u00e9s pr\u00e9sente tr\u00e8s peu de risque en dehors des fausses routes lors de la d\u00e9glutition avec efforts de toux (leur go\u00fbt n\u2019est pas tr\u00e8s agr\u00e9able\u2026), et leur \u00e9limination se fait comme pour les aliments par les selles. Il faut cependant savoir que du fait de leur couleur blanche ils entra\u00eenent tout \u00e0 fait normalement des selles pl\u00e2treuses et tr\u00e8s d\u00e9color\u00e9es.<br><br>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>C\u2019est une substance injectable ou ing\u00e9rable qui am\u00e9liore la visualisation des organes explor\u00e9s. Il existe plusieurs cat\u00e9gories..<\/p>\n","protected":false},"author":1,"featured_media":1400,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[11],"tags":[],"class_list":["post-1366","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-faq"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Qu\u2019est ce qu\u2019un produit de contraste ? - CIPAD<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/cipad.fr\/index.php\/2022\/12\/29\/quest-ce-quun-produit-de-contraste\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Qu\u2019est ce qu\u2019un produit de contraste ? - CIPAD\" \/>\n<meta property=\"og:description\" content=\"C\u2019est une substance injectable ou ing\u00e9rable qui am\u00e9liore la visualisation des organes explor\u00e9s. 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