Vanhu vazhinji havazvizive izvi, asi vamwe vanhu vanorwara nazvosimbi.Zvinoenderana neruzivo rwekumashure rwakaburitswa muchinyorwa chitsva, gumi muzana yevagari veGerman vanorwarisa nickel.
Asi mishonga yekurapa inoshandisa nickel.Nickel-titanium alloys ari kuramba achishandiswa semidziyo yekumisikidza yemoyo mune zvishoma invasive maitiro, uye mushure mekudyara, aya alloys anoburitsa zvidiki nickel nekuda kwekuora.Zvine ngozi here?
Boka revatsvakurudzi vanobva kuJena, Prof. Rettenmayr naDr. Andreas Undis, vanoshuma kuti waya dzakagadzirwa kubva ku nickel-titanium alloy dzinobudisa nickel shoma, kunyange kwenguva yakareba.Nguva yekuyedza yekuburitswa kwesimbi imazuva mashoma, sezvinodiwa nehurumende kuti ibvumidzwe kuisirwa mishonga, asi boka rekutsvagisa raJena rakaona kuburitswa kwenickel kwemwedzi misere.
Chinhu chekudzidza iwaya yakaonda yakagadzirwa ne superelastic nickel-titanium alloy, iyo inoshandiswa, semuenzaniso, nenzira ye occluder (iyi ndiyo mishonga yekurapa inoshandiswa kugadzirisa mwoyo septal defect).An occluder kazhinji ine waya mbiri dikimesh“maamburera” anenge saizi yesimbi yemaeuro.Iyo superelastic implant inogona kudhonzwa nemuchina muwaya yakatetepa iyo inogona kuiswa mucatheter yemoyo."Nenzira iyi, iyo occluder inogona kuiswa ine zvishoma invasive maitiro," Undisch akadaro.Nenzira yakanaka, iyo implant icharamba iri mumurwere kwemakore kana makumi emakore.
Occluder yakagadzirwa nickel-titanium alloy.Aya maimplants ekurapa anoshandiswa kugadzirisa yakaremara moyo septum.Credit: Mufananidzo: Jan-Peter Kasper/BSS.
Undis uye mudzidzi wechiremba Katarina Freiberg aida kuziva zvakaitika kune nickel-titanium waya panguva iyi.Vakaisa masampula ewaya neakasiyana emakanika uye ekupisa kurapwa kune ultraure mvura.Vakabva vayedza kuburitswa kwe nickel zvichibva pane zvakafanotemerwa nguva dzenguva.
“Izvi hazvisi zvinhu zviduku,” anodaro Undish, “nokuti simbi inobudiswa kazhinji inenge iri painozoonekwa.”, vakabudirira kugadzira nzira yakasimba yekuyera kuburitsa nickel.
"Kazhinji, mumazuva ekutanga nemavhiki, zvichienderana nekutanga kurapwa kwezvinhu, yakawanda nickel inogona kusunungurwa," Undisch inopfupisa mhinduro.Zvinoenderana nemidziyo masayendisiti, izvi zvinokonzerwa nekuremerwa kwemuchina pakudyara panguva yekushanda."Deformation inoparadza hutete hwe oxide hunovhara zvinhu.Chigumisiro ndechekuwedzera kwekutanganickelkupora.”nickel isu tinotora kuburikidza nechikafu zuva rega rega huwandu.
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