Cov pov tseg ob npaug - xaus cannulakoob,raws li ib hom khoom siv kho mob uas ncaj qha rau tib neeg cov ntaub so ntswg, yuav tsum xaiv cov khoom siv uas tsis tsuas yog cuam tshuam rau cov khoom siv kho mob, tab sis kuj ncaj qha txiav txim siab txog kev nyab xeeb ntawm cov neeg mob thiab cov neeg mob. Kab lus no yuav tshawb txog cov ntaub ntawv keeb kwm kev tshawb fawb los ntawm peb qhov loj: hlau, polymers, thiab cov ntaub ntawv txheej.

1. Hlau Needle Core: Qhov sib npaug ntawm qhov muaj zog thiab tawv

Raws li koj cov ntaub ntawv, cov khoom siv hlau ntawm Trocar Needles tuaj yeem ua los ntawm 304 lossis 316 stainless hlau. Rau qhov muab pov tseg ob npaug - xaus cannula koob, rab koob tseem ceeb yuav tsum tau ua tiav ib txhij ua tiav qhov kev sib tw ntawm qhov kawg thiab lub zog ntawm kev ua haujlwm kawg.

• 304 stainless hlau:Muaj 18% chromium thiab 8% npib tsib xee. Nws muaj zoo heev corrosion kuj thiab machinability, thiab muaj tus nqi nruab nrab. Nws yog qhov tsim nyog rau kev phais niaj hnub, tab sis tej zaum yuav muaj pitting corrosion nyob rau hauv chloride- muaj ib puag ncig (xws li peritoneal effusion).
• 316 stainless hlau:Muaj 2% -3% molybdenum, uas txhim kho nws cov chloride corrosion ntau zaus. Nws yog tsim nyog rau lub sij hawm ntev indwelling los yog rooj plaub nrog complex internal ib puag ncig. Nws lub zog tawm los yog kwv yees li 205 MPa, uas yog txaus los tiv thaiv axial quab yuam thaum puncture yam tsis muaj deformation.
• Nickel{0}}titanium alloy (Nitinol):Qee qhov siab -kawg ob-kawg catheter koob yog ua los ntawm npib tsib xee-titanium nco alloy rau lub ntsej muag blunt. Nws siv nws cov super elasticity los kho nws cov qub zoo nyob rau hauv lub xeev khoov, ua rau nws tshwj xeeb tshaj yog haum rau saj zawg zog puncture scenarios xws li ntuj orifice transluminal endoscopic phais (CEEB TOOM).

II. Txheej Tube: Kev sib ntaus sib tua ntawm Transparency thiab muaj zog

Lub raj sab nrauv yuav tsum muaj ob qho tib si siab pob tshab (kom pom yooj yim ntawm cov cuab yeej sab hauv) thiab kev tiv thaiv siab (kom tiv thaiv kev tawg). Tam sim no, muaj ob txoj kev daws teeb meem tseem ceeb:

• Kev Kho Mob Polycarbonate (PC):Lub teeb xa tawm tuaj yeem ncav cuag 90%, thiab nws qhov cuam tshuam tsis kam yog 10 npaug ntawm acrylic. Nws tuaj yeem tiv taus ethylene oxide sterilization. Qhov tsis zoo yog tias nws muaj qhov cuam tshuam rau kev yaig los ntawm cov kuab tshuaj organic (xws li iodophor), thiab kev saib xyuas yuav tsum tau them rau qhov sib xyaw ntawm cov tshuaj tua kab mob.
• Polyetheretherketone (PEEK):Nws muaj kev kub siab dua thiab tshuaj lom neeg ruaj khov, thiab tuaj yeem rov ua kom tsis muaj menyuam nyob rau hauv qhov kub thiab txias. Txawm li cas los xij, nws kim heev thiab muaj qhov pom tseeb me ntsis. Nws feem ntau yog siv rau hauv cov catheters uas siv tau, thiab ib qho khoom siv sijhawm tsawg dua.

III. Sealing Cheebtsam: Elasticity thiab Durability

Lub sealing valve yog ib qho tseem ceeb rau kev tswj lub hauv siab - mob plab. Cov khoom siv yuav tsum khaws nws cov elasticity txawm tias tom qab rov ntxiv cov twj paj nruag.

• Kev kho mob silicone roj hmab:kwv yees li 40A, tensile zog Ntau dua los yog sib npaug rau 7 MPa, compression tas li deformation tus nqi <20%. Nws muaj cov tshuaj lom neeg tsis zoo thiab tsis muaj cytotoxicity, tab sis nws cov hnav tsis kam yog qhov tsis zoo. Tom qab siv ntau yam, nws tuaj yeem tsim cov khib nyiab.
• Thermoplastic polyurethane (TPU):Nws muab cov elasticity ntawm cov roj hmab thiab cov khoom ua haujlwm ntawm cov yas. Nws hnav tsis kam yog peb zaug siab dua li ntawm cov roj hmab silicone, thiab nws tuaj yeem ua tiav cov duab geometric nyuaj los ntawm kev txhaj tshuaj molding. Qee cov khoom ntxiv graphite los yog PTFE micro- hmoov rau lub sealing di ncauj kom txo tau qhov sib txhuam coefficient.

IV. Txheej Technology: Los ntawm Lubrication mus rau Antibacterial Properties

Cov txheej yog tus phab ej zais uas txhim kho kev ua tau zoo ntawm cov khoom siv pov tseg ob zaug - tas catheter koob:

• Hydrophilic lubricating txheej:Piv txwv li, polyvinylpyrrolidone (PVP) los yog polyethylene oxide (PEO), thaum raug dej, tsim cov gel-zoo li nto, txo cov puncture quab yuam los ntawm 40% mus rau 60%. Nws yog ib qho tseem ceeb kom nco ntsoov qhov degradation tus nqi ntawm cov txheej hauv lub cev kom tsis txhob detachment thiab ua rau lub cev txawv teb chaws.
• Antibacterial txheej:Silver ions lossis chlorhexidine coatings tuaj yeem cuam tshuam cov colonization ntawm Staphylococcus aureus thiab Escherichia coli, txo cov kab mob ntawm qhov chaw. Txawm li cas los xij, qhov sib npaug yuav tsum raug ntaus ntawm cov kab mob tua kab mob thiab cytotoxicity. Tam sim no, qhov concentration ntawm FDA- pom zoo txheej cov khoom yog feem ntau tswj ntawm 0.5-1.0 ug / cm².
• Antithrombotic txheej:Rau cov kua dej -hom ob- tas cov koob tshuaj cannula uas yuav tsum tau khaws cia ntev, cov txheej txheem heparin lossis phosphocholine tuaj yeem txo cov platelet adhesion thiab thrombosis.

V. Kev ntsuam xyuas Biocompatibility

Raws li ISO 10993 tus qauv, cov khoom pov tseg ob zaug - xaus cannula koob yuav tsum dhau cov kev sim xws li cytotoxicity, intradermal irritation, ncua - hom tshuaj tiv thaiv kab mob siab, thiab mob toxicity. Nws yog ib qho tseem ceeb tshwj xeeb tshaj yog tias ob - cov qauv xaus tuaj yeem ua rau cov khoom hnav ntxiv, thiab lawv qhov loj me me thiab cov lus teb ntawm phagocytic yuav tsum tau soj ntsuam. Tam sim no, cov khoom lag luam tseem ceeb tau dhau tag nrho cov ntawv pov thawj biocompatibility, thiab tus nqi ntawm cov ntawv ceeb toom tsis zoo tshwm sim tsawg dua 0.01%.

Cov ntsiab lus

Kev xaiv ntawm cov ntaub ntawv pov tseg ob npaug - xaus cannula koob yog cov txheej txheem kev ua haujlwm zoo heev. Los ntawm cov hlau mus rau polymers, los ntawm lub cev mus rau txheej txheej, kev xaiv ntawm txhua yam khoom cuam tshuam rau kev nyab xeeb, kev ua tau zoo, thiab kev lag luam ntawm lub cuab yeej. Nrog rau qhov tshwm sim ntawm nanomaterials thiab ntse teb cov txheej txheem, lub neej yav tom ntej ntawm ob - tas cannula koob yuav ua pov thawj ntau dua nyob rau hauv kev sib koom ua ke lom neeg.