https://en.wikipedia.org/wiki/Veress_needle

Thaum peb tham txog lubVeress koob,peb feem ntau tsom ntsoov rau nws cov qauv siv tshuab thiab cov txheej txheem kho mob, tab sis zoo li yuav saib tsis tau cov lus nug tseem ceeb: Cov khoom siv rau kev tsim cov koob yuav tsum xaiv li cas? Raws li cov ntaub ntawv, kev kho mob stainless hlau tau dhau los ua qhov tseem ceeb vim nws cov biocompatibility thiab yooj yim kom tsis muaj menyuam, tab sis qhov no yog deb ntawm qhov kawg ntawm zaj dab neeg.

Tam sim no, feem ntau ntawm Veress koob cov lus qhia yog ua los ntawm 304 lossis 316L austenitic stainless hlau. Qhov zoo ntawm cov khoom no yog qhov pom tseeb: tus nqi tswj tau, kev ua tiav, thiab muaj peev xwm tiv taus 134℃siab - kub thiab siab - siab ua kom tsis muaj menyuam tsis muaj deformation. Txawm li cas los xij, stainless hlau kuj tseem muaj nws qhov kev txwv. Ua ntej, muaj qhov tsis sib xws ntawm hardness thiab toughness - kom tswj tau qhov ntse ntawm rab koob, yuav tsum muaj hardness ntau dua, tab sis qhov no yuav ua rau kom brittleness thiab muaj kev pheej hmoo ntawm pob txha thaum ntsib calcified rectus sheath. Qhov thib ob, muaj qhov teeb meem ntawm qhov hnyav. Tag nrho - steel qauv ntawm Veress koob xav tias hnyav hauv tes, thiab tuav ntev ntev tuaj yeem ua rau qaug zog ntawm tus kws kho mob txhais tes.

Yog li ntawd, cov kws tshawb fawb cov ntaub ntawv tau pib tshawb nrhiav lwm txoj kev daws teeb meem. Titanium alloys tuaj rau pem hauv ntej. Titanium alloys muaj qhov ntom ntawm tsuas yog 60% ntawm cov hlau tsis muaj steel, tab sis lawv tuaj yeem muab tib lub zog los yog ntau dua. Qhov no ua rau lub koob kom muaj ib txoj kab uas hla loj dua thaum tuav tib txoj kab uas hla sab nraud, yog li kev txhim kho kev nce nqi. Qhov tseem ceeb tshaj, titanium alloys muaj zog heev corrosion kuj thiab tsis yog -magnetic, ua rau lawv tsim nyog rau kev cuam tshuam kev khiav hauj lwm coj los ntawm MRI. Txawm li cas los xij, lawv cov nqi siab thiab kev ua haujlwm nyuaj tau txwv lawv qhov loj - kev nce qib.

Lwm txoj hauv kev yog siv cov khoom siv polymer sib xyaw. Qee cov khoom siv sim sim siv polyetheretherketone los ua lub cev tseem ceeb ntawm rab koob, tsuas yog me me ceramic lossis stainless hlau hniav kos rau ntawm lub taub. Cov khoom siv PEEK nws tus kheej muaj biocompatibility zoo heev thiab tawg pob tshab, ua kom yooj yim pom qhov chaw. Nyob rau tib lub sijhawm, nws cov elastic modulus yog ze rau tib neeg cov ntaub so ntswg, thiab "kev cuam tshuam" thaum lub sij hawm puncture yog qhov tseeb dua, uas pab cov kws kho mob pom cov kev hloov hauv cov ntaub so ntswg. Txawm li cas los xij, qhov kev sib tw nyob rau hauv tias PEEK qhov hnav tsis kam yog tsis zoo li hlau, thiab tom qab siv ntau yam, burrs yuav tshwm sim.

Nws yog ib qho tsim nyog sau cia tias thev naus laus zis kho saum npoo tau dhau los ua lub ntsiab lus tseem ceeb los txhim kho kev ua tau zoo ntawm cov tsoos stainless hlau. Lub cev vapor deposition technology tso ib txheej ntawm pob zeb diamond-zoo li zaj duab xis ntawm lub koob nto, uas tuaj yeem ua rau qhov tawv tawv kom nce mus rau theem ze ntawm cov pob zeb diamond, thaum txo cov kev sib txhuam coefficient. Cov tshuaj tiv thaiv kab mob ntawm cov koob kho tuaj yeem raug txo los ntawm ntau dua 30%, thiab tom qab- kev ua haujlwm qhov mob ntawm cov neeg mob hauv qhov chaw puncture yog qis dua. Tsis tas li ntawd, kev tshawb fawb ntawm cov tshuaj tua kab mob coatings kuj nce qib. Silver ions lossis chitosan txheej tuaj yeem tua cov kab mob epidermal uas tuaj yeem nkag mus rau hauv lub plab kab noj hniav thaum lub sijhawm puncture.

Rau lub tsev kho mob cov chaw yuav khoom, kev xaiv cov khoom muaj xws li kev lag luam - tawm ntawm tus nqi thiab kev ua haujlwm. Standard stainless hlau koob yog txaus rau 90% ntawm cov qauv kev phais, tab sis rau cov neeg mob rog rog, cov neeg uas muaj adhesions loj los ntawm kev phais yav dhau los, los yog cov me nyuam thiab lwm pab pawg neeg tshwj xeeb, tus nqi kev nyab xeeb coj los ntawm siab - cov ntaub ntawv ua tau zoo yog tsim nyog. Nyob rau hauv lub neej yav tom ntej, raws li additive manufacturing technology matures, peb yuav pom ib tug "gradient khoom" koob - nrog ib tug heev nyuaj ntsis, ib tug saj zawg zog ncej, thiab antibacterial nto, combining tag nrho cov zoo nyob rau hauv ib tug.