{"id":29617,"date":"2019-04-24T10:05:13","date_gmt":"2019-04-24T10:05:13","guid":{"rendered":"https:\/\/johnsonfrancis.org\/professional\/?p=29617"},"modified":"2019-04-24T10:05:13","modified_gmt":"2019-04-24T10:05:13","slug":"triboelectric-pacemaker-powered-by-cardiac-contractions","status":"publish","type":"post","link":"https:\/\/johnsonfrancis.org\/professional\/triboelectric-pacemaker-powered-by-cardiac-contractions\/","title":{"rendered":"Triboelectric pacemaker powered by cardiac contractions"},"content":{"rendered":"<p><iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/8ctl3R12JiQ\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen=\"\"><\/iframe><\/p>\n<h2><span style=\"color: #008000;\">Triboelectric pacemaker powered by cardiac contractions<\/span><\/h2>\n<p>Usually modern pacemakers are powered by built-in batteries and you need to replace the pulse generator when the battery reaches end of life. What if the device gets charged itself using energy of cardiac contractions? That is exactly what a triboelectric pacemaker powered by cardiac contractions aims to achieve. Triboelectric effect is typically the static electricity which is generated when a plastic comb is used on dry hair. Researchers have tested a s<em>ymbiotic cardiac pacemaker&nbsp;<\/em>which uses an <span style=\"color: #0000ff;\">implantable triboelectric nanogenerator (iTENG) <span style=\"color: #000000;\">which harvests energy from cardiac contractions and stores in a capacitor [1].<\/span><\/span><\/p>\n<p>The <span style=\"color: #000000;\">iTENG <\/span>can harvest 0.495\u2009\u03bcJ of energy during each cardiac contraction, while only&nbsp; 0.377\u2009\u03bcJ is required for a pacing cycle for endocardial pacing.&nbsp;Nanostructured polytetrafluoroethylene (PTFE) thin film was one triboelectric layer in the patch applied over the left ventricle of the experimental animal to harvest energy. Spacer layer was a three dimensional (3D) elastic sponge (ethylene-vinyl acetate copolymer). Memory alloy ribbon made of highly resilient titanium was utilized as the keel. The whole assembly was enclosed in a flexible Teflon film and a polydimethylsiloxane layer.<\/p>\n<p>The triboelectric nanogenerator was placed between the heart and pericardium with the PTFE layer facing the left ventricle. Cardiac contractions caused periodic contact and separation of the two triboelectric layers, generating energy, which was stored in a 100\u2009\u03bcF capacitor through a rectifier. The capacitor could be charged from 0 to 3.55 V within 190 minutes in the large animal model. They could use the stored energy to pace the animal at 3\u2009V with pulse width of 0.5\u2009ms. This could be used to correct experimental sinus node dysfunction induced by local hypothermia.<\/p>\n<p><span style=\"color: #ff00ff;\">This is just a proof of concept study which is quite encouraging. But we need much more technological developments to enable clinical use. Finally, the longevity of the device and biocompatibility of the materials used in the long term should be proved beyond doubt before we can ever dream of a heart powered pacemaker for the heart.<\/span><\/p>\n<p><strong><span style=\"color: #0000ff;\">Reference<\/span><\/strong><\/p>\n<ol>\n<li>Ouyang H, Liu Z, Li N, Shi B, Zou Y, Xie F, Ma Y, Li Z, Li H, Zheng Q, Qu X, Fan Y, Wang ZL, Zhang H, Li Z. <a href=\"https:\/\/www.nature.com\/articles\/s41467-019-09851-1\">Symbiotic cardiac pacemaker<\/a>. Nature Communications. 2019;10:1821.<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"<p>Triboelectric pacemaker powered by cardiac contractions Usually modern pacemakers are powered by built-in batteries and you need to replace the pulse generator when the battery reaches end of life. What if the device gets charged itself using energy of cardiac contractions? That is exactly what a triboelectric pacemaker powered by cardiac contractions aims to achieve. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":29618,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"nf_dc_page":"","footnotes":""},"categories":[2],"tags":[],"class_list":["post-29617","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cardiology"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Triboelectric pacemaker powered by cardiac contractions - All About Cardiovascular System and Disorders<\/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:\/\/johnsonfrancis.org\/professional\/triboelectric-pacemaker-powered-by-cardiac-contractions\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Triboelectric pacemaker powered by cardiac contractions - All About Cardiovascular System and Disorders\" \/>\n<meta property=\"og:description\" content=\"Triboelectric pacemaker powered by cardiac contractions Usually modern pacemakers are powered by built-in batteries and you need to replace the pulse generator when the battery reaches end of life. What if the device gets charged itself using energy of cardiac contractions? That is exactly what a triboelectric pacemaker powered by cardiac contractions aims to achieve. 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