{"id":123,"date":"2024-06-27T13:20:40","date_gmt":"2024-06-27T13:20:40","guid":{"rendered":"https:\/\/deacumstii.ro\/?p=123"},"modified":"2024-06-27T13:20:40","modified_gmt":"2024-06-27T13:20:40","slug":"tatuaj-pe-inima","status":"publish","type":"post","link":"https:\/\/deacumstii.ro\/?p=123","title":{"rendered":"Tatuaj pe inim\u0103"},"content":{"rendered":"<table>\n<tbody>\n<tr>\n<td width=\"679\">\n<table>\n<tbody>\n<tr>\n<td width=\"1026\">\u0218tiu c\u0103 pare o poveste rupt\u0103 dintr-un film science-fiction, dar o echip\u0103 de cercet\u0103tori chiar lucreaz\u0103 la un tatuaj care se aplic\u0103 pe&#8230; inim\u0103. Igor Efimov, inginer cardio-vascular la Northwestern University, din Chicago, Statele Unite ale Americii, \u00eempreun\u0103 cu colegii s\u0103i, lucrau la crearea unui material implantabil care s\u0103 r\u0103spund\u0103 mai bine nevoilor corpului uman \u0219i s\u0103 fie mai bine integrat. Cea mai mare provocare era asocierea unui material rigid, specific componentelor electronice, cu \u021besuturile moi din corpul uman. Stimulatoarele cardiace folosite \u00een prezent ac\u021bioneaz\u0103 prin ni\u0219te electrozi foarte sub\u021biri \u0219i lungi, introdu\u0219i prin vene \u00een interiorul inimii. De fiecare dat\u0103 c\u00e2nd inima bate, ace\u0219ti electrozi sunt supu\u0219i stresului mecanic, iar inima uman\u0103 bate, \u00een mod normal, cam de 100.000 de ori pe zi.<\/p>\n<p>Efimov afirm\u0103 c\u0103 electrozii folosi\u021bi \u00een prezent, fiind supu\u0219i continuu stresului mecanic, se por rupe. De aceea, cercet\u0103torul, \u00eempreun\u0103 cu echipa sa, au pornit \u00een c\u0103utarea unui material care s\u0103 se poat\u0103 mi\u0219ca \u00een tandem cu mu\u0219chiul cardiac, dar care s\u0103 aib\u0103, evident, propriet\u0103\u021bi conductive. Astfel, \u00een 2021, Efimov a dat peste un articol care prezenta un material cu propriet\u0103\u021bi promi\u021b\u0103toare pentru proiectul s\u0103u: \u201eFabricare, caracteristici \u0219i aplica\u021bii ale tatuajelor cu grafen\u201d. Autorul lucr\u0103rii, <a href=\"https:\/\/scholar.google.com\/citations?user=B8VFZxsAAAAJ&amp;hl=en\">Dmitry Kireev<\/a>, inginer bio-medical la Universitatea din Austin, Texas (SUA), afirm\u0103 c\u0103, spre deosebire de componentele confec\u021bionate din metal, grafenul permite reducerea dimensiunilor p\u00e2n\u0103 la nivelul unui singur r\u00e2nd de atomi. \u201eGrafenul, un singur r\u00e2nd de atomi de carbon dispu\u0219i \u00een form\u0103 de fagure, e un material foarte potrivit pentru <a href=\"https:\/\/www.sciencenews.org\/article\/worlds-thinnest-material-stretches-bends-twists\">utilizarea \u00een domeniul medical<\/a>\u201d spune Nai-Chang Yeh, fizician\u0103 de la <a href=\"https:\/\/www.caltech.edu\/\">Caltech<\/a>. \u201eGrafenul este foarte flexibil, e biocompatibil, e transparent, este un foarte bun conductor \u0219i este foarte rezistent la stresul mecanic\u201d, completeaz\u0103 ea.<\/p>\n<p>Provocarea, pentru Efimov, era c\u0103, p\u00e2n\u0103 \u00een acel moment, nu mai \u00eencercase aplicarea unui tatuaj direct pe inim\u0103. De aceea, el l-a contactat pe Kireev \u0219i i-a zis: \u201eNu vrei s\u0103 \u00eencerci tu s\u0103 faci asta? Noi te putem ajuta\u201d. Cei doi coordonatori \u0219i-au unit echipele \u0219i au \u00eenceput s\u0103 experimenteze pe \u0219oricei de laborator, reu\u0219ind, astfel, s\u0103 corecteze aritmia. Electrozii de grafen folosi\u021bi au fost izola\u021bi \u00een interiorul unor pliuri ultra-sub\u021biri de polimeri \u0219i silicon flexibil, iar leg\u0103tura dintre electrozi \u0219i sursa de energie s-a f\u0103cut prin panglici de aur. Echipa de cercet\u0103tori spune c\u0103 viitoarele variante vor fi alimentate wireless de la\u00a0 surs\u0103 din afara corpului.<\/p>\n<p>Efimov a descris procedeul a\u0219a cum \u00eel vede el \u00een viitor: \u201e\u00eentr-o bun\u0103 zi vom avea un dispozitiv de dimensiunea unui bob de orez, care va fi injectat direct \u00een mu\u0219chiul inimii \u0219i va putea \u00eendeplini func\u021bia de stimulator cardiac f\u0103r\u0103 ca pacientul s\u0103 mai treac\u0103 printr-o opera\u021bie chirurgical\u0103 clasic\u0103\u201d. De\u0219i sun\u0103 a science-fiction, tehnologia e foarte aproape de a fi pus\u0103 la punct \u0219i <em>de acum \u0219tii<\/em>.<\/p>\n<p>&nbsp;<\/p>\n<p><a href=\"https:\/\/www.sciencenews.org\/article\/graphene-tattoo-heart-beat-pacemaker\">Sursa<\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"<p>\u0218tiu c\u0103 pare o poveste rupt\u0103 dintr-un film science-fiction, dar o echip\u0103 de cercet\u0103tori chiar lucreaz\u0103 la un tatuaj care se aplic\u0103 pe&#8230; inim\u0103. Igor Efimov, inginer cardio-vascular la Northwestern University, din Chicago, Statele Unite ale Americii, \u00eempreun\u0103 cu colegii s\u0103i, lucrau la crearea unui material implantabil care s\u0103 r\u0103spund\u0103 mai bine nevoilor corpului uman [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":124,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"class_list":["post-123","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tech"],"_links":{"self":[{"href":"https:\/\/deacumstii.ro\/index.php?rest_route=\/wp\/v2\/posts\/123","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/deacumstii.ro\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/deacumstii.ro\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/deacumstii.ro\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/deacumstii.ro\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=123"}],"version-history":[{"count":1,"href":"https:\/\/deacumstii.ro\/index.php?rest_route=\/wp\/v2\/posts\/123\/revisions"}],"predecessor-version":[{"id":125,"href":"https:\/\/deacumstii.ro\/index.php?rest_route=\/wp\/v2\/posts\/123\/revisions\/125"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/deacumstii.ro\/index.php?rest_route=\/wp\/v2\/media\/124"}],"wp:attachment":[{"href":"https:\/\/deacumstii.ro\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=123"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/deacumstii.ro\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=123"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/deacumstii.ro\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=123"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}