Evolution Ntawm Quincke Vs. Pencil Point Designs Thiab Tiv Thaiv Cov Ntshav Cerebrospinal Fluid

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Nyob rau hauv lub microscopic realm ntawm interventional neuroradiology thiab kev tswj mob, tus tsim lub tswv yim ntawm lubDisposable Sterile Medical Spinal Needle​ sawv cev rau qhov tsis tu ncua (kev ua si ntawm leverage) ntawm mechanics thiab histology. Raws li tus thawj coj thoob ntiaj teb hauv kev kho mob thev naus laus zis, BD (Becton, Dickinson thiab Lub Tuam Txhab) tsis yog tsuas yog tswj hwm qhov ntim ntau lawm tab sis kuj tseem tshuav ib qho cim tsis txaus ntseeg ntawm keeb kwm kev hloov pauv ntawm rab koob geometry. Los ntawm ib lub chaw tsim khoom R & D foundations, kev xaiv ntawm rab koob tip tsim yog deb ntawm ib tug mere variation nyob rau hauv tej style; Nws ncaj qha hais txog cov txheej txheem tseem ceeb ntawm cov txheej txheem pathophysiological tom qab cov teeb meem kho mob tau hais tseg hauv koj cov lus piav qhia: "ntshav cerebrospinal kua los ntawm kev raug mob ntawm lub venous plexus."

Cov tsoos Quincke Point, qhia txog kev kho mob los ntawm Dr. Heinrich Quincke, tso siab rau ntawm 15℃mus rau 30℃bevel lub kaum sab xis los hlais los ntawm dural collagen fibers zoo li scalpel. Txawm li cas los xij, qhov "txiav" txheej txheem no yog ob- ntaj ntug. Thaum rab koob hla lub dura mater mus rau hauv qhov chaw subarachnoid, lapse ntawm tus neeg teb xov tooj tactile kev nkag siab lossis tus neeg mob txav tuaj yeem ua rau lub ntsej muag ntse hla Batson's venous plexus anterior mus rau qaum. BD txoj kev tshawb fawb thaum ntxov tau qhia tias qhov loj ntawm lub ntsej muag ntawm Quincke bevel, thaum nws ua txhaum lub nkoj, tso cai rau cov ntshav rov qab sai, yooj yim kis rau tag nrho cov qauv CSF. Qhov no ua rau muaj kev tsis sib haum xeeb tseem ceeb ntawm "kev raug mob kais" thiab "subarachnoid hemorrhage," raws li tau sau tseg:"Yog tias nws tsis raug txheeb xyuas tam sim ntawd, nws yooj yim kom tsis meej pem nrog cov kab mob ntshav cerebrospinal kua."

Txhawm rau txo qhov no, BD pioneered lub Whitacre (Cum Point) tsim. Lub kiv puag ncig kev tsim khoom no tau hloov pauv lub ntsiab lus ntawm "txiav" mus rau "tshem tawm." Pencil Point muaj qhov kaw, sib npaug nrog ib sab - chaw nres nkoj qhib. Thaum ntsib lub dura, lub taub hau siv blunt dissection rau ib feem ntawm longitudinal fibers tom qab, tsim ib tug slit -zoo li qhib. Qhov no cleft zoo li kaw spontaneously thaum koob rho tawm vim elastic recoil ntawm dural fibers. Los ntawm qhov kev xav ntawm hydrodynamic, thaum sab -chaw nres nkoj aperture me dua, BD's patented Thin Wall stainless hlau cannula thev naus laus zis ua kom muaj CSF txaus tus nqi rau kev pom tseeb, ib txhij txo qhov kev pheej hmoo ntawm sab - chaw nres nkoj npoo abrading venous plexus.

Ib txheej tob ntawm kev tsim kho tshiab nyob hauv BD qhov kev qhia txog "Key/Slot" locking mechanism. Qhov no micro-feature daws cov keeb kwm kev taw qhia tsis meej pem ntawm xaum -point koob. Tsis zoo li Quincke taub qhov twg bevel orientation qhia kev taw qhia, xaum thaum ntxov - taw tes tsim ua rau sab- chaw nres nkoj orientation nyuaj rau kev pom qhov muag. Los ntawm kev sib koom ua ke ntawm lub cev xauv qhov ntawm lub hub- koob hlws ris, BD ua kom cov stylet aligns zoo kawg nkaus, ua kom sab - chaw nres nkoj taw qhia zoo dua (mus rau midline qhov twg lub venous plexus tsis ntom). Qhov no micron- theem kev tsim khoom precision muab cov neeg ua haujlwm nrog cov lus pom zoo tactile, tiv thaiv "sib sib zog nqus koob" uas ua rau ventral venous plexus raug mob.

Tsis tas li ntawd, BD's standardization ntawm hub xim codes (ib ISO 6009) transcends aesthetics; nws yog ib qho tseem ceeb ntawm kev ruaj ntseg raws tu qauv. Hauv cov chaw kho mob tshwm sim lossis qhia hauv tsev kho mob, qhov pom kev pom tam sim ntawm lub 21G ntsuab lossis dub 22G hub tso cai rau cov kws kho mob paub tam sim tias lawv tau siv rab koob zoo - ntsuas ntsuas, ua rau muaj kev hloov pauv hauv kev siv dag zog thiab qhov kev cia siab tob. Rau cov neeg nyob hauv junior, qhov kev pom kev pom no txo ​​qhov kev pheej hmoo ntawm "kev paub tsis txaus" ua rau kev tuav tsis ruaj khov thiab tsis pom kev raug mob vascular. Hauv cov ntsiab lus, los ntawm kev ua kom zoo ntxiv ntawm ob qho tib si Quincke thiab Pencil Point platforms-tshwj xeeb tshaj yog qhov kev tawg ntawm Whitacre tip micro- sib tsoo thiab kev tswj hwm kev tswj hwm-BD tau txo qis qhov tshwm sim ntawm kev raug mob venous plexus raug mob, piv txwv li cov tuam txhab ua haujlwm sab saum toj {{10}.