Cov neeg feem coob tsis paub txog qhov no, tab sis qee cov neeg tsis haum rauhlau.Raws li cov ntaub ntawv keeb kwm yav dhau los luam tawm nyob rau hauv ib tsab xov xwm tshiab, kaum feem pua ​​​​ntawm cov neeg German muaj kev tsis haum rau npib tsib xee.
Tab sis kev kho mob cog siv nickel.Nickel-titanium alloys tau siv ntau dua los ua cov khoom siv rau kev cog cov hlab plawv hauv cov txheej txheem ua haujlwm tsawg, thiab tom qab cog, cov alloys tso tawm me me ntawm nickel vim corrosion.Puas yog nws txaus ntshai?
Ib pawg kws tshawb fawb los ntawm Jena, Prof. Rettenmayr thiab Dr. Andreas Undis, tshaj tawm tias cov xov hlau ua los ntawm cov nickel-titanium alloy emit nickel tsawg heev, txawm tias lub sijhawm ntev.Lub sijhawm kuaj rau cov hlau tso tawm tsuas yog ob peb hnub, raws li tsoomfwv xav tau rau kev pom zoo rau kev cog qoob loo, tab sis Jena pawg neeg tshawb fawb tau soj ntsuam cov nickel tso tawm rau yim lub hlis.
Cov khoom ntawm txoj kev tshawb no yog ib tug nyias hlau ua los ntawm ib tug superelastic npib tsib xee-titanium alloy, uas yog siv, piv txwv li, nyob rau hauv daim ntawv ntawm ib tug occluder (cov no yog cov kev kho mob implants siv los kho lub plawv septal defect).Ib qho occluder feem ntau muaj ob lub xaim me memesh"umbrellas" txog qhov loj ntawm ib lub npib euro.Lub superelastic implant tuaj yeem raug rub mus rau hauv cov hlau nyias uas tuaj yeem muab tso rau hauv lub plawv catheter."Nyob rau hauv txoj kev no, occluder tuaj yeem muab tso nrog txoj kev cuam tshuam tsawg kawg," Undisch tau hais.Qhov zoo tshaj plaws, qhov cog cog yuav nyob twj ywm hauv tus neeg mob rau xyoo lossis ntau xyoo.
Occluder ua los ntawm nickel-titanium alloy.Cov implants kho mob no yog siv los kho lub plawv septum.Yees duab: Jan-Peter Kasper / BSS.
Undis thiab tus kws kho mob cov tub ntxhais kawm Katarina Freiberg xav paub seb muaj dab tsi tshwm sim rau nickel-titanium hlau nyob rau lub sijhawm no.Lawv raug xaim kuaj nrog ntau yam kev kho tshuab thiab thermal kho rau cov dej ntshiab.Tom qab ntawd lawv tau sim cov nickel tso tawm raws li lub sijhawm teem tseg.
Undish hais tias, "Qhov no tsis yog qhov tseem ceeb," "vim tias qhov concentration ntawm cov hlau tso tawm feem ntau yog nyob ntawm qhov txwv ntawm kev tshawb pom.", tau ua tiav los ntawm kev tsim cov txheej txheem kev sim uas muaj zog rau kev ntsuas cov txheej txheem nickel tso tawm.
"Feem ntau, hauv thawj hnub thiab lub lis piam, nyob ntawm kev kho ua ntej ntawm cov khoom siv, cov nyiaj npib tsib xee tseem ceeb tuaj yeem raug tso tawm," Undisch piav qhia cov txiaj ntsig.Raws li cov kws tshawb fawb cov ntaub ntawv, qhov no yog vim lub tshuab load ntawm lub cog thaum lub sijhawm ua haujlwm."Deformation rhuav tshem cov txheej nyias ntawm oxide npog cov khoom.Qhov tshwm sim yog qhov nce hauv thawj zaugnpib tsib xeerov qab los."nickel peb nqus los ntawm cov khoom noj txhua hnub.
Hauv Science 2.0, cov kws tshawb fawb yog cov neeg sau xov xwm, tsis muaj kev nom kev tswv lossis kev tswj hwm kev tswj hwm.Peb tsis tuaj yeem ua qhov no ib leeg, yog li thov ua koj feem.
Peb yog ib lub koom haum non-profit, Tshooj 501(c)(3) science news corporation uas qhia ntau tshaj 300 lab tus tib neeg.
Koj tuaj yeem pab ua cov nyiaj pub dawb dawb hnub no thiab koj qhov nyiaj pub dawb yuav mus 100% rau peb cov haujlwm, tsis muaj nyiaj hli lossis chaw ua haujlwm.