Lub ophthalmic vitrector yog cov cuab yeej tseem ceeb rau kev phais vitrectomy (PPV), feem ntau yog siv los tshem tawm cov kab mob vitreous hauv lub qhov muag lossis kho qhov muag hauv qab qhov txhab xws li retina thiab macular cheeb tsam. Nws yog "cov cuab yeej tseem ceeb" rau kev kho cov kab mob hauv qab qhov muag.
Lub npe tag nrho ntawm ophthalmic vitrector yog "vitreoretinotomy". Nws lub luag haujlwm tseem ceeb yog txhawm rau tshem tawm cov huab, nthuav tawm lossis kab mob vitreous hauv lub qhov muag los ntawm kev sib xyaw ua haujlwm ntawm siab - ceev cov tshuab txiav thiab lub siab tsis zoo, thaum zam kev puas tsuaj rau cov qauv ib puag ncig xws li retina thiab lens. Nws yog tsuas yog siv nyob rau hauv "minimally invasive vitrectomy" thiab yog cov cuab yeej tseem ceeb rau kev daws qhov muag hauv qab kab mob xws li vitreous hemorrhage, retinal detachment, thiab macular qhov.
Kev ua haujlwm ntawm vitrector cia siab rau "txiav - perfusion - suction" triad system.
1. Core txiav tivthaiv
Cov lus qhia yog qhov tseem ceeb, feem ntau yog ua los ntawm titanium alloy los yog kev kho mob stainless hlau, nyob rau hauv daim ntawv ntawm ib rab koob (lub koob txoj kab uas hla feem ntau yog 23G, 25G, 27G, nrog rau cov zauv loj qhia tias thinner diameters). Qhov kawg ntawm lub taub hau muaj qhov siab - nrawm rotating txiav ntug (3000-15000 revolutions ib feeb), uas tuaj yeem zom cov nqaij mos rau hauv cov khoom me me.
2. Perfusion thiab suction system
Perfusion channel: Sab nraud ntawm lub taub yog nruab nrog lub raj perfusion, uas tsis tu ncua txhaj tshuaj kom tsis txhob muaj ntsev sib npaug kom muaj kev ruaj ntseg hauv lub cev thiab tiv thaiv qhov muag pob muag.
Suction channel: Sab hauv ntawm lub taub hau yog cov qauv hollow, los ntawm qhov tsis zoo siab yog siv los nqus cov ntu ntu ntu, cov ntshav ntau ntxiv, thiab lwm yam los ntawm lub qhov muag, tswj xyuas qhov chaw phais kom meej.
3. Zog thiab ceev tswj
Kev txiav ceev thiab qhov tsis zoo siab tuaj yeem hloov kho los ntawm kev tswj kev phais: Cov vitreous mos yog txiav ntawm qhov qis qis (3000-6000 revolutions ib feeb), thiab proliferative nyuaj vitreous yuav tsum muaj kev kub ceev (8000-15000 revolutions ib feeb), ntsuas kev txiav txiav thiab cov ntaub so ntswg kev nyab xeeb.
