Txhua qhov kev pabcuam catheter tuaj txog ntawm tib cov lus nug ntawm cov khoom siv. Qhov twg silicone, ua li cas, ntawm qhov hardness, nrog cov ntaub ntawv twg. Teb lawv tsis ncaj ncees lawm thiab cov hom tsis ua hauj lwm yog kwv yees. Lub balloon tawg hauv qab nws qhov ntsuas siab. Ib lub phab ntsa nyias nyias kinks thaum tus kws kho mob ntsib kev tawm tsam. Ib qho extractables profile stalls qhov kev ntsuam xyuas lom peb lub hlis ua ntej tso tawm.
Cov lus qhia no suav nrog kev txiav txim siab catheter silicone uas muaj feem cuam tshuam rau kev lag luam thiab kev tswj hwm. Nws sib piv cov kua roj hmab silicone tiv thaiv HTV cov khoom siv silicone, teeb tsa lub hom phiaj hardness thiab kam rau ua los ntawm cov khoom, piav qhia txog lub zais pa thiab kev ua kom tsis muaj menyuam, thiab teev cov ntaub ntawv hauv tsev kho mob cov neeg yuav khoom lossis lub cev ceeb toom yuav nug kom pom.
Qhov twg Silicone zaum hauv lub Catheter
Ib lub cuab yeej muaj peev xwm muaj tsib lub ntsiab lus silicone, txhua tus muaj nws tus kheej xav tau.
Ncej tubing, lub ntsiab lumen, feem ntau ntau lumen
Balloon, hauv Foley, embolectomy thiab qee cov qauv vascular
Distal tip geometry, feem ntau ntxig molded rau ntawm ncej
hub thiab connector, qhov uas hloov tau silicone raws li ib tug nruj polymer
Valve thiab septum qhov chaw, nyob rau hauv koob tsis pub nkag chaw nres nkoj
Ncej tubing yog txiav txim siab ntawm qhov sib xws, concentricity thiab sab zog. Balloons raug txiav txim rau ntawm phab ntsa uniformity thiab tawg siab. Cov hub raug txiav txim siab ntawm daim ntawv cog lus lub zog rau ABS, polycarbonate lossis PVC. Kev kho tag nrho tsib raws li ib qho kev txiav txim siab yog ib qho yuam kev thiab kim, vim tias qib uas yeej ntawm lub zais pa tuaj yeem poob ntawm cov ncej extrusion tawm los.
Silicone khwv tau nws qhov chaw hauv cov haujlwm no rau plaub qhov laj thawj. Nws nyob twj ywm ntawm lub cev kub. Nws zam rov ua kom tsis muaj menyuam hla txhua txoj hauv kev tseem ceeb. Nws muaj keeb kwm biocompatibility tob. Nws ciaj sia rov flexing zoo dua li feem ntau lwm txoj kev. Kev lag luam tawm yog mechanical zog. Tensile thiab kua muag qhov tseem ceeb zaum hauv qab polyurethane, yog li cov qauv tsim xav tau cov npoo uas suav rau cov khoom siv tsis yog xav tias nws.
LSR lossis HTV: Thawj Qhov Kev Txiav Txim Siab
Ob tsev neeg muaj nyob hauv qib kho mob. Geometry, ntim thiab txheej txheem kev lag luam tsav kev xaiv ntau dua li ib qho khoom ntiag tug.
LSR rau me me, meej, siab ntim qhov chaw
Cov kua roj hmab silicone tuaj txog ua ob lub twj tso kua mis, ntsuas thiab sib xyaw ntawm cov xovxwm lossis extruder. Kaw pwm txhaj tshuaj thiab crosshead extrusion muab nruj tolerances, luv luv voj voog thiab cov ntsiab lus ntawm kev ua haujlwm tsawg. Nyias phab ntsa, me me multi lumen profiles, valve qhov chaw thiab siab kab noj hniav suav tag nrho cov nyiam LSR.
HTV rau balloons thiab loj bores
High sib xws roj hmab, tseem hu ua khoom silicone, yog milled thiab compounded ua ntej extrusion los yog compression molding. Nws lees txais cov khoom ntim ntau dua, uas txhawb nqa lub zog tensile thiab tsim kua muag. Balloon tubing, loj bore drain tubing thiab ntev profiles feem ntau khiav hauv HTV vim li ntawd.
| Qhov xwm txheej | LSR | HTV (khoom silicone) |
|---|---|---|
| Kev sib xyaw thiab kev xa khoom | Metered los ntawm ob feem | Milled, compounded, ces tsim |
| Muaj peev xwm ua siab ntev | nruj, feem ntau +/- 0.05 hli ntawm cov ntawv me | Dav, geometry nyob ntawm |
| Balloon kev ua yeeb yam | Ua haujlwm hauv cov phab ntsa nyias heev | Txaus siab rau siab tawg zog |
| Tensile thiab kua muag zog | qis | Siab dua nrog kev txhawb nqa muab tub lim |
| Lub sijhawm voj voog | Luv luv | Ntev hauv compression molding |
| Cov ntsiab lus ua haujlwm | Tsawg | Siab dua |
| Huv chav haum | Muaj zog, kaw qhov system | Tswj tau nrog tswj |
| Zoo tshaj plaws | Multi lumen shafts, li qub, tswv yim, septa | Balloons, loj bore tubing, profiles |
Muaj ntau txoj haujlwm catheter khiav ob tsev neeg. Cov ncej yog extruded nyob rau hauv LSR, lub balloon yog molded nyob rau hauv HTV, thiab ob yog koom nrog ib tug silicone nplaum los yog ib tug bondable LSR qib. Kev tswj cov khoom siv ob lub tshuab ntxiv kev tsim nyog ua haujlwm, thiab nws feem ntau ntaus yuam ib qib rau hauv lub luag haujlwm nws tsis haum.
Hardness, Dimensions thiab Tolerance Target
Hardness tswj tau yooj yim, kink tsis kam thiab ntxig quab yuam, thiab nws cuam tshuam ncaj qha nrog phab ntsa thickness. A 60 Shore A ncej ntawm 1.0 hli phab ntsa tiv thaiv kinking zoo dua li 40 Shore A ncej ntawm tib phab ntsa, thiab nws kuj tau yooj yim dua los ntawm lub nkoj nqaim. Catheter designers tsis tshua tau txais kev txhim kho dawb hauv ib qho kev taw qhia.
| Cheebtsam | Hom hardness | Hom phab ntsa thickness | Tsim ntawv |
|---|---|---|---|
| Urinary catheter ncej | 60-80 Nkoj A | 0.8-1.5 hli | Nyuaj txhawb kev ntxig |
| Vascular catheter ncej | 50-75 Nkoj A | 0.1-0.4 hli | Feem ntau graded raws qhov ntev |
| Foley balloon | 30 mus rau 50 Shore A | 0.05-0.15 hli | Tsawg nce siab xav tau cov phab ntsa nyias |
| Lub raj xa dej | 50 txog 70 Shore A | 1.0-2.0 hli | Kink tsis kam dhau mus ntev |
| Koob dawb valve | 30 mus rau 50 Shore A | Ib feem tshwj xeeb | Tsawg compression teeb yog qhov tseem ceeb |
Tolerance cais cov neeg xa khoom muaj peev xwm los ntawm tus so. Extruded LSR tubing nyob rau hauv me me diameters muaj peev xwm tuav roughly +/- 0.05 hli nyob rau hauv lub puab thiab txheej txoj kab uas hla raws li txoj cai tswj. Compression molded qhov chaw ua raws li cov qauv roj hmab molded hauv ISO 3302-1, chav kawm M2 lossis M3 nyob ntawm qhov loj thiab qhov loj me. Nug cov kev txwv nruj dua li cov txheej txheem tuaj yeem tuav tus nqi nce siab thiab txo cov txiaj ntsig, uas tshwm sim tom qab raws li cov teeb meem xa khoom ntau dua li qhov teeb meem nqi.
Ob tus qauv tsim kom txo tau qhov siab ntev. Kos qhov ntev uas tswj tau ua haujlwm yog qhov tseem ceeb, thiab tawm ntawm qhov seem ntawm kev lag luam kam rau siab yog li kev tshuaj xyuas thaj av uas nws tseem ceeb. Qhia kom meej concentricity rau multi lumen tubing, vim hais tias phab ntsa variation nyob ib ncig ntawm lub lumen drives balloon asymmetry ntau tshaj nominal txoj kab uas hla.
Balloon Performance thiab Wall Consistency
Lub zais pa yog qhov kev pheej hmoo siab tshaj plaws hauv feem ntau cov qauv catheter. Nws inflates tawm tsam cov ntaub so ntswg, tuav lub siab rau lub sij hawm nyob, thiab deflates mus rau ib tug txhais profile rau tshem tawm.
Parameters uas muaj nyob rau ntawm daim duab:
Rated tawg siab, txheeb xyuas ntawm ib tug txhais ntau yam ntawm kev ua hauj lwm siab
Phab ntsa thickness uniformity, uas teev qhov qhib siab
Kev qaug zog tus cwj pwm hla kev nce nqi rov qab
Ua raws li nkhaus, siab rau txoj kab uas hla kev sib raug zoo
Txoj kev sim nqa hnyav npaum li tus lej. Kev ntsuas tawg ntawm ib sab tes khi raj yuav tsis kwv yees lub zais pa ntau lawm nrog cov ntxig molded taub thiab ib qho kev sib koom ua ke sib txuas. Qhov twg lub zais pa yog qhov tseem ceeb ntawm kev nyab xeeb, thov cov ntaub ntawv tawg thiab qaug zog ntawm kev sib dhos ua tiav, txij li cov pob qij txha thiab cov nplaum sib txuas ua tsis tau ua ntej lub raj ua.
HTV balloons feem ntau ncav cuag lub zog tawg ntau dua ntawm cov phab ntsa vaj huam sib luag vim tias cov khoom ntim ntau dua nqa cov tensile thiab tsim kua muag. LSR balloons nyob twj ywm kev sib tw hauv cov phab ntsa nyias, thiab lawv xav kom nruj extrusion tswj thiab ua tiav kev kho kom tsis txhob muaj cov ntsiab lus tsis muaj zog.
Kev Tsim Nyog Kev Tsim Nyog rau Kev Pabcuam Catheter
Sterilization Compatibility
Silicone zam tag nrho peb txoj hauv kev ua kom tsis muaj menyuam. Qhov kev hloov pauv ntawd tseem ceeb rau kev lag luam thaum ib lub cuab yeej platform nkoj mus rau hauv kev lag luam nrog cov kev coj ua hauv tsev kho mob sib txawv, vim tias cov khoom siv tsis yuam kev rov tsim dua.
| Txoj kev | Txuj | Cov nyhuv ntawm silicone | Cov ntawv sau tseg |
|---|---|---|---|
| Gamma irradiation | ISO 11137 Kev Tswj Xyuas | Crosslink ceev nce, hardness yuav drift | Dose mapping xav tau, saib yellowing thiab elongation poob |
| Ethylene oxide | ISO 11135 Kev Tswj Xyuas Kev Lag Luam | Tsawg cuam tshuam rau cov khoom | Residual EtO thiab EO txwv yuav tsum muaj kev lees paub |
| Moist kub, steam | ISO 17665 Kev Tswj Xyuas | Kev cuam tshuam tsawg | Haum rau reusable accessories thiab tais |
Radiation koob tshuaj yog qhov sib txawv los saib xyuas. Ib koob tshuaj 25 kGy validated yog muaj nyob rau hauv cov cuab yeej siv kho mob, thiab ntau dua cumulative koob accelerates crosslinking, uas stiffens cov khoom thiab txo elongation. Yog tias lub cuab yeej tuaj yeem ua kom tsis muaj menyuam ntau dua ib zaug, tsim kom muaj qhov sib xyaw ua ke rau hauv cov khoom tsim nyog es tsis yog sim ib lub voj voog thiab xav tias qhov seem.
Biocompatibility thiab ntaub ntawv
Catheters hu rau mucosa, ntshav los yog cov ntaub so ntswg sab hauv, yog li cov khoom siv ntim cov khoom siv tshuaj ntsuam xyuas kab mob. Cia siab tias yuav muab:
TS EN ISO 10993-5 cytotoxicity
ISO 10993-10 lossis ISO 10993-23 rau khaus thiab rhiab heev
TS EN ISO 10993-11 Kev mob toxicity nyob qhov twg tau qhia
USP Class VI raws li cov qauv kev soj ntsuam cov khoom siv dav dav
REACH thiab RoHS nqe lus rau kev nkag mus rau kev lag luam
FDA 21 CFR 177.2600 qhov kev sib cuag nrog zaub mov siv rau cov khoom siv sib txuas
Kev kho mob tom qab cuam tshuam rau pob no ntau dua li cov neeg yuav khoom feem ntau paub. Ib txoj hauv kev kho kom zoo yog nqa cov ntsiab lus qis dua thiab cov ntaub ntawv huv huv extractables, uas txhawb nqa cov tshuaj lom neeg ua haujlwm raws li ISO 10993-18. Paub meej tias tom qab kev kho mob ua haujlwm raws li cov kauj ruam tswj nrog lub sijhawm kaw, qhov kub thiab txias, vim tias qhov ci tsis tau sau tseg tsis tuaj yeem tiv thaiv thaum kuaj xyuas.
Cov qauv ntaus ntawv kuj tseem siv tau. Intravascular catheters poob nyob rau hauv ISO 10555 tsev neeg thiab cov bore connectors me me raws li ISO 80369. Cov ntaub ntawv cov ntaub ntawv txhawb nqa cov kev ntsuam xyuas thiab yeej tsis hloov lawv.
Tus nqi qauv thiab cov nqe lus ua lag luam
Chav tsev tus nqi hauv catheter silicone yog tsav los ntawm rau yam, kwv yees li ntawm kev cuam tshuam.
Tooling, them upfront los yog amortized rau hauv daim nqi
Cavitation, uas teev cov nqi voj voog ib feem
Kev kam rau siab thiab qib tshuaj xyuas
Cov ntaub ntawv qib, nrog cov qib kho mob thiab tom qab kho cov qib nqa tus nqi
Ntxuav chav kawm thiab cov ntaub ntawv tob
Txhua xyoo ntim thiab xaj qauv
Cov nqe lus qis tshaj plaws feem ntau yog ib qho uas muaj kev zam siab tshaj plaws thiab cov ntaub ntawv thinnest. Sib piv cov lus tawm tsam ib daim ntawv teev npe ruaj khov ua ntej muab cov lej sib piv. Ib tus neeg muag khoom uas tsis tuaj yeem hais txog qhov kev kho mob, cov kab mob tom qab kho tsis tau thiab cov saw hlau ntau ntxiv yuav raug nqi ntau dua tom qab, thaum kev lees paub pom qhov sib txawv.
Rau extrusion nyob rau hauv cov qib no, tshuaj xyuas cov platinum kho ntau yam ntawm cov kua silicone roj hmab. Rau cov khoom ntim ntau dua thiab cov khoom siv zais pa, saib cov khoom siv silicone roj hmab.
Supplier Qualification Checklist
ISO 13485 daim ntawv pov thawj, nrog ISO 9001 ua hauv pem teb tsis yog lub hom phiaj
Kev kho mob qib kev sib xyaw ua ke nyob rau hauv cov ntaub ntawv hloov pauv txheej txheem
Validated post kho nrog kaw lub sij hawm, kub thiab airflow
Nyob rau hauv tus txheej txheem dimensional soj ntsuam nrog statistical tswj ntawm qhov tseem ceeb qhov ntev
Ntxuav chav molding qhov twg cov cuab yeej faib yuav tsum tau
Traceability los ntawm cov khoom tiav rov qab mus rau ntau ntau thiab kho cov ntaub ntawv
Qauv thiab pilot ntau qhov kev pabcuam ua ntej kev cog lus rau kev cog lus
Ua ntej ua haujlwm hauv chav kawm khoom siv, tsis yog kev paub txog silicone ib leeg
Qhov twg ANYSIL Fits
ANYSIL cov tebchaw thiab pwm platinum kho LSR thiab HTV cov khoom siv silicone hauv Guangzhou, nrog lub peev xwm txhua hli siab dua 300 tons thiab 15 tus neeg ua haujlwm tshaj lij suav nrog qib kev txhim kho, kev siv cuab yeej thiab kev tsav tsheb khiav. Cov qib kho mob nkoj nrog ISO 10993 cov ntawv ceeb toom thiab USP Chav Kawm VI cov ntaub ntawv uas daim ntawv thov hu rau lawv, thiab tom qab kev kho mob ua haujlwm raws li cov txheej txheem tswj hwm nrog cov kev txwv tsis pub dhau los ua kab xaiv ntawm daim duab.
Xa cov duab kos, lub hom phiaj hardness, txoj kev ua kom tsis muaj menyuam thiab ntim txhua xyoo. Pab pawg kws tshaj lij yuav pom zoo LSR lossis HTV cov khoom siv los ntawm cov khoom siv thiab xa rov qab cov qauv kev npaj nrog cov ntaub ntawv teev npe rau koj cov ntaub ntawv tsim.
Thov kev ntsuam xyuas silicone catheter