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Niewielki czujnik przywraca zmysł dotyku po urazach i amputacjach

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Izraelscy naukowcy opracowali technologię, która pozwoli przywrócić zmysł dotyku m.in. osobom po amputacjach i urazach. Innowacyjny czujnik poprzez przewodzenie prądu ze zdrowego nerwu odtwarza czucie w utraconej kończynie lub w miejscu urazu. Wynalazek wykorzystuje najnowocześniejszą technologię, nie wymaga ładowania i jest prosty w implantacji.

Przełomowa technologia została opracowana przez badaczy z Uniwersytetu w Tel Awiwie. Zdaniem naukowców wynalazek daje nadzieje osobom, które utraciły zmysł dotyku w wyniku amputacji lub urazu.

Wynalazek odtwarza czucie dotyku

Wynalazek izraelskich naukowców z Uniwersytetu w Tel Awiwie wykorzystuje najnowocześniejszą technologię zwaną nanogeneratorem tryboelektrycznym (TENG). Czujnik składa się z dwóch płytek o wymiarach około 0,5 cm na 0,5 cm.

Wynalazek wszczepiany jest na przykład w nerw uszkodzonej kończyny i bezpośrednio łączony ze zdrowym nerwem. Za każdym razem, gdy kończyna styka się z powierzchnią, czujnik zostaje aktywowany, przewodzi prąd z nerwu funkcjonującego do uszkodzonego, dzięki czemu odtwarza czucie dotyku. Implementacja urządzenia nie jest skomplikowana. Czujnik nie wymaga również zewnętrznego ładowania. Naukowcy wyjaśniają, że czujnik działa na zasadzie siły tarcia – gdy tylko urządzenie zarejestruje tarcie, ładuje się.

Czujnik może przywracać zmysł dotyku w każdej części ciała

Badacze wskazują, że czujnik umieścić można w dowolnym miejscu ciała. Urządzenie wykonane jest z materiału biokompatybilnego.

Czujnik przetestowany został już w warunkach laboratoryjnych na modelach zwierzęcych. Naukowcy zaobserwowali, że zwierzęta, które wcześniej utraciły czucie, z pomocą czujnika poruszały się normalnie, a implant pozwalał im reagować na bodźce czuciowe. Badacze planują przetestować rozwiązanie na większych modelach zwierzęcych, a w kolejnym etapie na palcach stóp u osób, które utraciły w nich czucie.

Przywrócenie zmysłu dotyku może znacząco poprawić funkcjonowanie i jakość życia osób, które utraciły czucie. Co więcej, rozwiązanie może również ochronić te osoby przed niebezpieczeństwem, ponieważ osoby pozbawione dotyku mogą np. nie odczuć zmiażdżenia palca – wskazuje dr Ben M. Maoz z Uniwersytetu w Tel Awiwie.

Skuteczniejsza alternatywa dla obecnych protez neuronowych

Naukowcy podkreślają, że utrata zmysłu dotyku może być skutkiem wielu obrażeń – od drobnych ran wynikających ze skaleczenia do rozległych amputacji. Nawet jeżeli rana się zagoiła, w wielu przypadkach uszkodzenie nerwu prowadzić może do utraty zmysłu dotyku.

Izraelscy badacze wskazują, że w ostatnich latach w dziedzinie protez neuronowych dokonano obiecujących postępów. Istniejące technologie, zdaniem naukowców, posiadają jednak wiele wad. Przede wszystkim są kosztowne, a ich produkcja i użytkowanie bywają skomplikowane. Pacjenci muszą także korzystać z zewnętrznego źródła zasilania czujników.

Źródło: en-engineering.tau.ac.il

Przeczytaj także: Zakażenie rany – jak je rozpoznać i jak mu zapobiegać? Wywiad z ekspertką

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