Cov hlau feem ntau siv hauv kev kho mob - titanium
Nrog rau kev laus hauv peb lub teb chaws, qhov xwm txheej ntawm cov kab mob plawv yog nce xyoo los ntawm lub xyoo, thiab ntau thiab ntau tus neeg mob yuav tsum tau cardiac stents, bypasses, thiab pacemaker implantation phais. Yog li ntawd, kev tshawb fawb txog cov khoom siv kho mob plawv (xws li lub plawv li qub, cov ntshav lim, pacemakers thiab cov twj siv lub plawv, thiab lwm yam) tau nyiam cov neeg kho mob ntau.
Tib neeg lub cev muaj 14 hlau ntsiab lus suav nrog potassium, sodium, calcium, thiab magnesium, suav txog ntau dua 99% ntawm tag nrho cov hlau ions hauv tib neeg lub cev. Cov plaub hlau no tsis siv rau hauv tshuaj, tab sis titanium raug xaiv rau lub plawv. Dab tsi yog qhov kev thov ntawm titanium ua cov khoom siv kho vascular?
Nws hloov tawm hais tias titanium yog "biophilic hlau" uas muaj qhov tseem ceeb thiab tsis tshua muaj siab, tawv zoo li hlau, lub teeb zoo li txhuas, noj qab nyob zoo thiab ib puag ncig zoo. Cia peb qhia cov temperament ntawm titanium hlau ib los ntawm ib tug.
xeb dawb hlau
Txhua yam hlau yuav oxidize, xws li hlau, tooj liab, thiab txhuas, thiab yuav xeb, uas yog teeb meem rau tib neeg lub cev. Tab sis titanium tsis yog tsuas yog sib xws nrog cov kab mob nyob, tab sis oxidation ntawm titanium tsis muaj teeb meem rau tib neeg lub cev thiab tsuas yog tsim cov oxide zaj duab xis. Cov oxide zaj duab xis no muaj zog adhesion, siab inertness, thiab ntom ntom ntom ntom ntom. Tsis tsuas yog ua rau tib neeg sov thiab du kov, tab sis nws kuj tiv thaiv cov titanium alloy sab hauv. Sab hauv ib puag ncig ntawm tib neeg lub cev yeej tsis ua rau muaj kev puas tsuaj rau titanium. Txawm hais tias nws muab tso rau hauv dej hiav txwv rau ib puas xyoo, nws yuav tsis puas.
antibacterial titanium hlau
Titanium kuj tseem hnav-tiv taus thiab corrosion-resistant, tsis tshua muaj khaus rau ntawm phab ntsa tracheal, thiab yuav tsis cuam tshuam rau tib neeg lub cev tom qab lub neej. Titanium muaj cov tshuaj tua kab mob thiab tuaj yeem siv rau ntawm tib neeg lub cev tau ntau xyoo tsis muaj cov kab mob loj hlob.
titanium non-magnetic hlau
Titanium yog non-magnetic thiab chemically ruaj khov. Nws yuav tsis cuam tshuam nrog lub ntsuas thaum kuaj pom. Hauv magnetic resonance spectroscopy, artifacts tshwm sim los ntawm titanium yog tsawg.
Hlau uas tsis yooj yim deformed
Ntxiv nrog rau qhov tsim nyog, nws kuj yog "ntev" txaus. Thaum qhov kub ntawm titanium qis dua 315 degree, oxide zaj duab xis tuaj yeem tswj cov yam ntxwv ruaj khov thiab nws lub zog zoo txaus. Nws muaj zog tensile / tawm los, loj resilience, thiab tsis yooj yim deformed tom qab molding. Tau kawg, nws kuj yog lub teeb txaus.
Xyoo 1977, kuv lub teb chaws tau ua ib qho kev lag luam ntshiab titanium dag femoral taub hau hloov phais rau tus neeg mob. Tom qab 30 xyoo ntawm kev soj ntsuam, nws pom tau hais tias lub nto ntawm lub titanium prosthetic pob yog du, txoj kab uas hla tsis hloov loj, tsis muaj mob, thiab lub sij hawm ntev curative nyhuv yog zoo.
Vim yog "biophilic" cov khoom ntawm titanium, nws muaj biocompatibility zoo nrog tib neeg cov ntaub so ntswg thiab tsis muaj tshuaj lom, yog li nws tau siv dav hauv kev kho mob.
Tam sim no, kev siv cov titanium alloys hauv kev phais phais yog loj hlob ntawm tus nqi txhua xyoo ntawm 5%-7%. Daim ntawv tshaj tawm qhia tau hais tias daim ntawv thov ntawm titanium hauv kev kho mob feem ntau yog tsom rau hauv cov pob qij txha thiab hauv caug pob qij txha, suav txog 40% thiab 36% feem. Titanium tsis tsuas yog tuav txoj haujlwm tseem ceeb hauv kev lag luam kho mob, tab sis kuj ua lub luag haujlwm loj hauv tib neeg lub neej. Nws yog cov khoom siv dav hlau saum toj kawg nkaus uas tuaj yeem hloov mus rau qhov hnyav ntawm qhov chaw sab nrauv, thiab nws kuj yog cov khoom siv kho mob uas tuaj yeem cog rau hauv tib neeg lub cev thiab ua ib feem ntawm lub cev.
Raws li cov hlau muaj txiaj ntsig zoo li no, kuv vam tias yav tom ntej, titanium tuaj yeem pab ntau tus neeg hauv lawv lub neej txhua hnub thiab ua rau tib neeg muaj lub neej zoo dua.
