Abantu abaningi abakwazi lokhu, kodwa abanye abantu abakwaliwa nakhoizinsimbi.Ngokolwazi lwangemuva olushicilelwe esihlokweni esisha, amaphesenti ayishumi omphakathi waseJalimane awazwani ne-nickel.
Kodwa izimila zezokwelapha zisebenzisa i-nickel.Ama-alloys e-nickel-titanium aya ngokuya asetshenziswa njengezisetshenziswa zokufakelwa kwenhliziyo nemithambo yegazi ezinqubweni ezihlasela kancane, futhi ngemva kokufakwa, lawa ma-alloys akhulula amanani amancane e-nickel ngenxa yokugqwala.Ingabe kuyingozi?
Iqembu labacwaningi abavela ku-Jena, uProf. Rettenmayr kanye noDkt. Andreas Undis, babika ukuthi izintambo ezenziwe nge-nickel-titanium alloy zikhipha i-nickel encane kakhulu, ngisho nangesikhathi eside.Isikhathi sokuhlolwa kokukhishwa kwensimbi siyizinsuku ezimbalwa kuphela, njengoba kudingwa uhulumeni ukuze kugunyazwe ukufakelwa kwezokwelapha, kodwa ithimba labacwaningi likaJena labona ukukhishwa kwe-nickel izinyanga eziyisishiyagalombili.
Into yocwaningo intambo encane eyenziwe nge-superelastic nickel-titanium alloy, esetshenziswa, isibonelo, ngesimo se-occluder (lezi izimila zezokwelapha ezisetshenziselwa ukulungisa iphutha le-septal yenhliziyo).I-occluder ngokuvamile iqukethe izintambo ezimbili ezincaneImeshi“izambulela” ezilingana nohlamvu lwemali lwe-euro.I-superelastic implant ingadonselwa ngomshini ocingweni oluncane olungase lufakwe ku-catheter yenhliziyo.“Ngale ndlela, i-occluder ingafakwa ngenqubo ehlasela kancane,” kusho u-Undisch.Ngokufanelekile, ukufakelwa kuzohlala esigulini iminyaka noma amashumi eminyaka.
I-occluder eyenziwe nge-nickel-titanium alloy.Lezi zimila zezokwelapha zisetshenziselwa ukulungisa i-septum yenhliziyo enesici.Ikhredithi: Isithombe: Jan-Peter Kasper/BSS.
Undis kanye nesitshudeni sobudokotela uKatarina Freiberg wayefuna ukuthola ukuthi kwenzekeni ngentambo ye-nickel-titanium ngalesi sikhathi.Bafaka amasampula ocingo ngokwelashwa okuhlukahlukene kwemishini kanye ne-thermal emanzini e-ultrapur.Babe sebehlola ukukhishwa kwe-nickel ngokusekelwe kuzikhawu zesikhathi ezinqunywe kusengaphambili.
“Lokhu akuyona neze into encane,” kusho u-Undish, “ngoba ukugcwala kwensimbi ekhishwayo kuvame ukuba semkhawulweni wokutholwa.”, iphumelele ekwenzeni inqubo yokuhlola eqinile yokulinganisa inqubo yokukhishwa kwe-nickel.
"Ngokujwayelekile, ezinsukwini zokuqala nasemavikini, kuye ngokuthi ukwelashwa kwangaphambili kwezinto ezibonakalayo, inani elibalulekile le-nickel lingakhishwa," i-Undisch ifingqa imiphumela.Ngokusho kososayensi bezinto ezibonakalayo, lokhu kungenxa yomthwalo wemishini ekufakweni ngesikhathi sokusebenza.“I-deformation ibhubhisa ungqimba oluncane lwe-oxide olumboze into.Umphumela uba ukwanda kokuqalai-nickelukululama.”i-nickel siyithatha ngokudla inani lansuku zonke.
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