Hauv kev nce qib sai ntawm kev cuam tshuam neurointervention, precision thiab stability yog qhov tseem ceeb. Ntawm cov array ntawm sophisticated cov cuab yeej siv los ntawm neurointerventionists, lub Distal Access Catheter (DAC) tau los ua ib tug indispensable workhorse. Nws ua lub luag haujlwm tseem ceeb hauv kev ua kom muaj kev nyab xeeb thiab zoo rau kev kho mob zoo li ischemic stroke, cerebral aneurysms, thiab arteriovenous malformations (AVMs).
Dab tsi yog Distal Access Catheter?
Distal Access Catheter yog ib qho nruab nrab -ntev, loj- bore catheter tsim los muab kev txhawb nqa ruaj khov sib sib zog nqus hauv cov hlab ntsha neurovasculature. Nws ua raws li qhov ruaj khov "platform" lossis "rail" los ntawm cov microcatheters, stent retrievers, coils, thiab lwm yam khoom siv xa mus rau lub hom phiaj lesion.
Xav tias nws yog qhov txuas ntxiv ntawm txoj kev coj catheter. Thaum lub catheter qhia kev ruaj ntseg nyob rau hauv lub proximal zoo hlab ntsha (xws li, lub internal carotid los yog vertebral artery), lub DAC yog advanced distally, navigating lub tortuous curves ntawm lub pob txha taub hau puag mus txog rau lub intracranial hlab ntsha (piv txwv li, M1 ntu ntawm nruab nrab Cerebral Artery los yog cov hlab ntsha).
Key Cov yam ntxwv thiab cov qauv tsim
Kev ua tau zoo ntawm DAC pob khawm ntawm kev ua tib zoo sib npaug ntawm cov cuab yeej engineering:
1. Trackability thiab Pushability:Lub DAC yuav tsum yoog raws kom nruj, tortuous anatomy tsis ua rau vasospasm lossis dissection (trackability), thaum tseem muaj zog txaus los thawb los ntawm nws qhov kawg kawg yam tsis muaj kinking (pushability). Qhov no feem ntau ua tiav los ntawm txoj kev nyuaj, ntau- txheej braided tsim.
2. Distal Flexibility nrog Proximal Support:Lub hau catheter feem ntau yog mos thiab hloov tau yooj yim kom txo tau kev raug mob rau cov hlab ntsha me. Qhov kev hloov pauv no maj mam hloov mus rau qhov tawv tawv, txhawb nqa ntau dua raws nws qhov ntev.
3. Loj Inner Diameter (Luminal Size):Ib txoj kab uas hla loj loj (los yog bore) yog qhov tseem ceeb. Nws tso cai rau:
A. Kev tso cai ntawm ntau yam microcatheters thiab khoom siv.
B. Kev nqus tau zoo thaum cov txheej txheem thrombectomy (ADAPT txheej txheem).
C. Kev txhaj tshuaj zoo sib xws rau kev taug kev thiab angiography.
4. Hydrophilic Txheej:Feem ntau DACs muaj cov txheej txheem hydrophilic rau ntawm lawv qhov chaw sab nrauv, uas dhau los ua cov nplaum heev thaum ntub dej. Qhov no txo qis kev sib txhuam thaum lub sij hawm navigation thiab nce qib.
5. Kink Resistance:Internal braiding tiv thaiv lub catheter los ntawm collapsing los yog kinking thaum navigating ntse khoov, kom ib tug uninterrupted lumen rau cov khoom xa thiab aspiration.
Yuav siv DAC li cas? Cov"Tri-Axial"Qhov system
1. Sheath:Ib qho luv luv-introduction sheath muab tso rau hauv femoral lossis radial artery muab kev nkag mus rau vascular thawj zaug.
2. Coj Catheter:Lub catheter ntev ntev tau nce siab dhau ntawm ib lub xaim thiab muab tso rau hauv lub nkoj zoo sib xws (xws li, lub ncauj tsev menyuam Internal Carotid Artery).
3. Distal Access Catheter (DAC):Lub DAC tom qab ntawd dhau los ntawm microcatheter/microwire ua ke ("co-axial" txheej txheem) sib sib zog nqus mus rau hauv intracranial ncig. Thaum DAC nyob rau hauv ib qho chaw ruaj khov, lub microcatheter tuaj yeem ua tiav los ntawm nws mus rau lub hom phiaj meej.
Cov txheej txheem no tsim ib qho chaw ruaj khov "txoj kev loj" los ntawm qhov chaw nkag mus rau qhov txhab, txo qis kev sib txhuam thiab kev tswj kom zoo.