Likita PTFE (Polytetrafluoroethylene) Guidewirena'urar likita ce ta musamman da ake amfani da ita ta hanyoyi daban-daban na cin zarafi don kewaya ta hanyoyin jini, ducts, ko wasu sifofin jikin mutum. PTFE, wani nau'in fluoropolymer na roba, sananne ne don ingantaccen lubricity, juriya na sinadarai, da daidaituwar halittu, yana mai da shi ingantaccen kayan shafa don jagora. An ƙera wayoyi masu rufaffiyar PTFE don samar da kewayawa mai santsi, rage juzu'i, da rage rauni ga kyallen takarda yayin hanyoyin likita.