{"id":59084,"date":"2024-02-16T15:26:20","date_gmt":"2024-02-16T15:26:20","guid":{"rendered":"https:\/\/www.africa-press.net\/tchad\/politique\/des-ultrasons-portables-pour-surveiller-letat-des-organes"},"modified":"2024-02-16T15:48:47","modified_gmt":"2024-02-16T15:48:47","slug":"des-ultrasons-portables-pour-surveiller-letat-des-organes","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/des-ultrasons-portables-pour-surveiller-letat-des-organes","title":{"rendered":"Des ultrasons portables pour surveiller l’\u00e9tat des organes"},"content":{"rendered":"

Africa-Press – Tchad. <\/strong><\/span>C\u2019est une bande adhe\u0301sive orange qui se plaque sur la peau, presque anodine. Il s\u2019agit en re\u0301alite\u0301 d\u2019un appareil me\u0301dical, conc\u0327u pour remonter des donne\u0301es sur les organes internes. Il a e\u0301te\u0301 de\u0301veloppe\u0301 par une e\u0301quipe pluridisciplinaire de l\u2019universite\u0301 de Californie du Sud et du Massachusetts Institute of Technology (Etats-Unis), comptant des spe\u0301cialistes en ge\u0301nie me\u0301canique et biome\u0301dicale, en me\u0301catronique et en me\u0301decine. Le projet fait l\u2019objet d\u2019un article en acce\u0300s libre dans la revue Sciences Advances de fe\u0301vrier 2024.<\/p>\n

Appele\u0301 BAUS-E (pour \u00ab\u00a0bioadhesive ultrasound elastography\u00a0\u00bb), l\u2019autocollant large de 2,5 cm est fait d\u2019e\u0301lastome\u0300re et d\u2019hydrogel, sur 1,2 mm d’e\u0301paisseur. A la fois e\u0301metteur et re\u0301cepteur, il est surmonte\u0301 d\u2019un transducteur et embarque un circuit imprime\u0301 flexible de 128 canaux qui envoie des impulsions ultrasonores a\u0300 une fre\u0301quence autour du 7,5 MHz.<\/p>\n

Une surveillance en continu<\/b><\/p>\n

Selon l\u2019endroit ou\u0300 on le place, il envoie ces ultrasons sur un organe et rec\u0327oit une onde sonore en retour. Celle-ci est transfe\u0301re\u0301e sur un ordinateur ou\u0300 elle peut e\u0302tre interpre\u0301te\u0301e. Le syste\u0300me permet ainsi d\u2019avoir des indications sur la rigidite\u0301 des tissus de l\u2019organe cible\u0301. Les signaux recueillis peuvent indiquer le de\u0301veloppement d\u2019une tumeur, une de\u0301gradation des tissus ou encore renseigner sur l\u2019e\u0301tat d\u2019une greffe re\u0301cente, les premiers jours d\u2019une telle ope\u0301ration e\u0301tant les plus cruciaux.<\/p>\n

Dans son principe, le proce\u0301de\u0301 n\u2019est pas nouveau. Il s\u2019inspire des techniques d\u2019e\u0301lastographie (l\u2019e\u0301chographie en est une), mais sa nouveaute\u0301 tient a\u0300 sa vocation portable et surtout continu, au contraire d\u2019une intervention ponctuelle ou a\u0300 intervalles re\u0301guliers dans le cadre d\u2019une consultation.<\/p>\n

Vers un syste\u0300me portable<\/b><\/p>\n

Les chercheurs ont mene\u0301 des tests en laboratoire sur des rats. Ils ont affecte\u0301 l\u2019e\u0301tat du foie des animaux en leur injectant de la galactosamine, une substance qui provoque des ne\u0301croses, sur une pe\u0301riode de 48 heures. Les premiers signes de rigidification ont e\u0301te\u0301 de\u0301tecte\u0301s dans les six heures, ainsi que des marqueurs d\u2019une inflammation et diffe\u0301rents pics de rigidite\u0301 au fur et a\u0300 mesure de l’expe\u0301rience.<\/p>\n

En son e\u0301tat actuel, l\u2019appareil est relie\u0301 a\u0300 une machine externe pour envoyer des ultrasons. A terme, le projet serait de tout embarquer a\u0300 l\u2019inte\u0301rieur du syste\u0300me portable.<\/p>\n

Pour plus d’informations et d’analyses sur la Tchad<\/a>, suivez Africa-Press<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

Africa-Press – Tchad. C\u2019est une bande adhe\u0301sive orange qui se plaque sur la peau, presque anodine. Il s\u2019agit en re\u0301alite\u0301 d\u2019un appareil me\u0301dical, conc\u0327u pour remonter des donne\u0301es sur les organes internes. Il a e\u0301te\u0301 de\u0301veloppe\u0301 par une e\u0301quipe pluridisciplinaire de l\u2019universite\u0301 de Californie du Sud et du Massachusetts Institute of Technology (Etats-Unis), comptant des […]<\/p>\n","protected":false},"author":82,"featured_media":59083,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,10],"tags":[37,292,29],"class_list":["post-59084","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","category-toutes-les-actualites","tag-africa-press","tag-africa-press-tchad","tag-tchad"],"yoast_head":"\nDes ultrasons portables pour surveiller l'\u00e9tat des organes - tchad<\/title>\n<meta name=\"description\" content=\"C\u2019est une bande adhe\u0301sive orange qui se plaque sur la peau, presque anodine. 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