Tsis muaj kev txwv nruj ntawm microcatheter. Catheters nrog ib txoj kab uas hla sab nraud tsawg dua 3 Fabkis qhov loj yog feem ntau hu ua microcatheters. Fabkis loj tsuas yog F, lossis Fr, 3Fr=1mm, uas yog, 1F≈0.33mm.
Microcatheters tau siv dav hauv kev cuam tshuam peripheral, kev cuam tshuam ntawm lub plawv thiab kev cuam tshuam ntawm lub paj hlwb, nrog cov nqi ntawm ntau txhiab yuan mus txog ze li kaum txhiab yuan. Los ntawm peripheral mus rau lub plawv mus rau neurointerventional, kev nyuaj ntawm kev tsim khoom nce ntau. cov
Qhov ntev ntawm lub microcatheter los ntawm qhov sib thooj mus rau qhov kawg ntawm qhov kawg yog feem ntau yog 130-160CM. Kev cuam tshuam Peripheral feem ntau siv microcatheters nrog qhov ntev ntawm 130CM. Neurointervention feem ntau siv microcatheters nrog qhov ntev ntawm ntau tshaj 150CM. Sab hauv txoj kab uas hla (ID) ntawm microcatheter tseem tsis hloov pauv, thiab sab nraud txoj kab uas hla (OD) maj mam dhau los ntawm qhov kawg ntawm qhov kawg mus rau qhov kawg, yog li lub cev ntawm microcatheter yog tapered.
Kev ua tau zoo ntawm microcatheter yog txiav txim siab los ntawm kev sib npaug ntawm cov ntsuas hauv qab no. Qhov kawg ntawm qhov kawg yuav tsum tau hloov pauv kom muaj kev nyab xeeb, thiab qhov kawg ntawm qhov kawg yuav tsum tau ua kom muaj zog los txhim kho maneuverability.
Kink kuj: Cov yeeb nkab phab ntsa yuav tsum muaj kev txhawb nqa thiab tsis tawg lossis kink thaum khoov; qhov no yog tiav los ntawm cov yeeb nkab polymer cov khoom thiab cov hlau txheej.
Pushability: Lub zeem muag tswj tau raug xa mus rau qhov chaw nyob deb, thiab qhov kev tawm tsam tau txais los ntawm qhov kawg ntawm qhov kawg tuaj yeem raug pub rov qab mus rau ntu ze.
Trackability: Lub catheter tuaj yeem nce raws cov hlab ntsha ntawm cov hlab ntsha uas tau coj los ntawm cov ntawv qhia xov hlau yam tsis tau yuam kom ncaj rau cov kab lus qhia. Lub raj lub cev yog hloov tau yooj yim heev thiab lub raj lumen ib txwm nyob puag ncig.
Torquebility: Thaum cov seem nyob ze tig, qhov kawg kawg tuaj yeem tuav 1: 1 synchronous tig. cov
Shaping zog ntawm lub taub hau: Shaping pab txhawb microcatheter nkag mus rau angled ceg hlab ntsha. cov
Cov khoom siv sib xws: seb cov tshuaj ua kua embolic xws li DMSO tuaj yeem txhaj.
Cov khoom no tau ua tiav los ntawm cov khoom siv kev tshawb fawb, cov txheej txheem tsim khoom, thiab cov tshuab zoo. Nws yog ib qho tsim nyog los txo cov yeeb nkab txoj kab uas hla thaum tuav cov yam ntxwv saum toj no, uas tsis yooj yim ua tiav.
Los ntawm sab hauv mus rau sab nraud, microcatheters tau muab faib ua:
PTFE Linear: Nws yog cov khoom lag luam polymer nruab nrab ua tiav los ntawm cov txheej txheem extrusion. Tam sim no, nws yog tag nrho imported. Qhov laj thawj tseem ceeb yog tias nws raug txwv los ntawm cov qauv ntawm cov khoom xyaw polymer, nrog rau cov phab ntsa extrusion thickness thiab kam rau ua. PTFE muaj zoo lubricating zog thiab yog hydrophobic. Thaum lub hau npog npog nrog cov txheej hydrophilic yog lubricated los ntawm heparin saline, nws yooj yim heev kom dhau los ntawm microcatheter lumen nrog kev sib txhuam me ntsis.
Hlau txheej: Feem ntau muab faib ua ob txheej txheej: coiling (los yog kauv) thiab braiding. Lub qub hu ua coiling, thiab tom kawg yog hu ua braiding. Cov hlau txheej ntawm neurointerventional microcatheters feem ntau siv stainless hlau xaim, uas muaj kev ua haujlwm zoo. Qee cov microcatheters siv le Nitinol (ib qho hlau tsis sib nqus ntawm npib tsib xee thiab titanium), uas yog lub cim xeeb hlau tsim nyog rau kev kho mob ua ntej. Zoo li microcatheters, tab sis tsis zoo shaping zog. Coiling los yog Kauv muaj qhov yooj yooj yim, tab sis nws qhov kev ua tau zoo hauv kev thawb lub zog yog me ntsis tsis zoo.
Outer Jacket: Nws kuj yog ib qho khoom nruab nrab ntawm cov khoom siv polymer ua tiav los ntawm cov txheej txheem extrusion. Cov khoom siv feem ntau yog Pebax, PU lossis nylon.
Raws li qib ntawm microcatheter, nws tuaj yeem muab faib ua 3-7 ntu los ntawm qhov kawg ntawm qhov kawg mus rau ntu ntu, thiab qhov tuab ntawm txhua ntu maj mam txo qis. Qhov ntau dua ntawm cov ntu, qhov nyuaj ntawm cov tshuab tsis sib xws.
Peripheral microcatheters muab faib ua peb ntu, nrog qhov sib thooj OD ntawm 2.9 F, qhov chaw OD ntawm 2.7 F, ID ntawm 0.025", thiab lub raj ntev ntawm 130cm.
Feem ntau cov neurointerventional microcatheters tau muab faib ua tsib ntu, xws li microcathter nrog proximal OD 2.4F, distal OD 1.7F, ID 0.0165" (0.42mm), thiab raj ntev 150cm.
Qhov siab tshaj plaws microcatheter rau neurointervention tau muab faib ua xya ntu. Proximal OD 2.1F, distal OD 1.6F, ID 00165" (0.42mm), raj ntev 156cm.
Rau cov txheej txheej Jacket, ntau tus neeg xa khoom hauv tsev tuaj yeem ua tau raws li qhov yuav tsum tau ua los ntawm ntu ze rau ntu plaub thiab thib tsib. Txawm li cas los xij, rau ntu thib rau thiab xya, cov neeg muag khoom hauv tsev tam sim no tsis tuaj yeem ua tau raws li cov kev cai.
Cov txheej txheej polymer / hlau no tau sib xyaw ua ke los ntawm Lamination tshuab. Cov txheej txheem no nyuaj heev thiab tsis tuaj yeem kuaj xyuas vim tias kev tshuaj xyuas tsis zoo. Yog tias lub lamination tsis ua tiav zoo, cov khoom siv kho tshuab ntawm cov yeeb nkab lub cev yuav tsis ua raws li cov qauv.
Tus kov (Hub) ntawm lub microcatheter feem ntau yog pob tshab, ua kom yooj yim pom cov lus qhia ntawm cov hlau thiab lwm yam twj paj nruag. Cov txheej txheem Hub zoo tib yam yog kua nplaum. Cov txheej txheem zoo tshaj plaws yog kev txhaj tshuaj molding ncaj qha, uas ua ke nrog tus kov thiab lub raj lub cev. Cov kab noj hniav sab hauv muaj qhov sib npaug sib npaug thiab lub raj lub cev muaj kev sib khi zoo. Ntxiv nrog rau kev sib txuas ntawm tus kov thiab lub cev yeeb nkab, nruab Strain Relief (tseem hu ua lub tes tsho).