Taw qhia
Arteriovenous malformations (AVMs) yog ib hom vascular malformation nyob rau hauv uas cov hlab ntsha high-flow ncaj qha mus rau cov hlab ntsha uas tsis tshua muaj, bypassing lub capillary txaj. Txij li thaum lub siab siab ntawm cov hlab ntsha tuaj yeem ua rau cov hlab ntsha tawg, cov kev sib txuas no tuaj yeem ua rau muaj cov kab mob aneurysms, hemorrhages, thiab lwm yam teeb meem. Ib qho ntawm cov kev kho mob rau AVMs yog embolization therapy, uas cuam tshuam nrog kev thaiv cov hlab ntsha uas pub cov malformation nrog embolic agents xws li coils, particles, los yog kua nplaum. Txhawm rau ua tiav qhov tseeb thiab nyab xeeb ntawm cov neeg ua haujlwm embolic mus rau lub hom phiaj, microcatheters tau siv.
Microcatheters
Microcatheters yog cov cuab yeej siv kho mob tsim los rau kev xa cov tshuaj kho mob thiab kuaj mob mus rau hauv cov hlab ntsha me thiab muag heev. Lawv yog cov nyias nyias thiab yoog raws feem ntau yog ua los ntawm cov khoom siv biocompatible xws li polyurethane, nylon, lossis PEEK (polyether ether ketone). Sab nraud txoj kab uas hla ntawm lub catheter ranges ntawm 0.5 mus rau 1.5 hli, nyob ntawm daim ntawv thov. Micro catheters tuaj yeem taug kev los ntawm cov hlab ntsha uas muaj zog thiab nqaim nyob rau hauv kev taw qhia ntawm lub sijhawm, xws li fluoroscopy lossis angiography.
Microcatheters rau Embolization
Hauv kev kho mob embolization rau AVMs, microcatheters yog qhov tseem ceeb rau kev ncav cuag cov hlab ntsha noj ntawm qhov tsis zoo. Lub microcatheter yog muab tso rau hauv ib lub catheter loj, xws li ib tug guiding catheter los yog diagnostic catheter, uas twb muab tso rau hauv lub hom phiaj lub nkoj. Tom qab ntawd lub micro catheter tau nce mus rau qhov kawg ntawm cov hlab ntsha noj mov uas siv lub micro guidewire. Tus neeg sawv cev embolic raug xa los ntawm lumen ntawm microcatheter mus rau hauv lub nkoj lub hom phiaj nyob rau hauv siab, uas thawb tus neeg sawv cev mus rau qhov kawg ntawm qhov kawg thiab ua rau occlusion ntawm lub nkoj. Lub microcatheter tuaj yeem thim rov qab thiab rov ua haujlwm thaum lub sijhawm ua haujlwm yog tias tsim nyog.
Qhov zoo ntawm Micro catheters
Micro catheters muaj ntau qhov zoo dua li cov pa catheters rau embolization. Ua ntej, microcatheters hloov tau yooj yim dua thiab tuaj yeem taug kev los ntawm cov hlab ntsha uas tsis muaj kev puas tsuaj los yog kev sib cais. Qhov no yog qhov tshwj xeeb tshaj yog nyob rau hauv AVM embolization, qhov twg cov hlab ntsha pub mis feem ntau muaj lub cev tsis zoo thiab muaj feem cuam tshuam los yog rupture. Qhov thib ob, microcatheters muaj lub cheeb me me, uas tso cai rau kev xaiv catheterization ntawm cov hlab ntsha me me thiab txo qhov kev pheej hmoo ntawm inadvertent embolization ntawm cov ntaub so ntswg. Thib peb, micro catheters tuaj yeem siv rau ob qho tib si proximal thiab distal embolization, uas muab cov kev cuam tshuam ntau ntxiv rau cov txheej txheem embolization thiab tso cai rau ntau lub hom phiaj occlusion ntawm cov hlab ntsha noj.
Microcatheters yog cov cuab yeej tseem ceeb rau kev kho embolization hauv cov neeg mob AVMs. Lawv tso cai rau kom meej thiab muaj kev nyab xeeb ntawm cov neeg ua haujlwm embolic mus rau lub hom phiaj ntawm qhov chaw, uas tuaj yeem ua rau muaj txiaj ntsig zoo ntawm cov hlab ntsha noj thiab txo qhov kev pheej hmoo ntawm vascular teeb meem. Kev siv cov microcatheters tau hloov pauv lub teb ntawm kev cuam tshuam neuroradiology thiab tau ua rau kev kho mob embolization ib txoj kev kho mob zoo rau AVMs.