-- Intraosseous Access Needles + Cwj Pwm: Thaum cov hlab ntsha ploj mus, cov pob txha pob txha dhau los ua cov hlab ntsha kawg.

The American Heart Association (AHA) and the Pediatric Advanced Life Support (PALS) guidelines have an unwritten rule: if a venous access cannot be established within 90-120 seconds, an alternative route must be initiated - and in scenarios such as collapse shock, cardiac arrest, and massive bleeding from multiple injuries, peripheral veins are not "difficult to find," but rather do not exist at all (due to collapsed blood vessels, low blood pressure, skin edema, and severe burn contractures). At this point, the IO needle is not an "alternative," but the only feasible intravascular access available at that time.

1. Vim li cas cov kab mob pob txha tuaj yeem siv los ua "cov hlab ntsha"?

Cov kab mob sinusoidal nyob rau hauv cov pob txha pob txha kab noj hniav tsis ncaj nraim rau cov leeg, tab sis lawv txuas nrog lub hauv paus ncig los ntawm qhov loj, qis -kev tiv thaiv kab noj hniav. Tom qab txhaj tshuaj / kua rau hauv lub plab kab noj hniav:

Lub sijhawm ua haujlwm tau zoo≈ Central venous tswj (feem ntau yuav tsum tau soj ntsuam cov lus teb hauv 30-60 vib nas this)

Nws tuaj yeem ua rau cov khoom siv lead ua, colloids, tag nrho cov ntshav / cov khoom siv ntshav, epinephrine, amine vasopressors, sedatives, tshuaj tua kab mob - yuav luag tag nrho cov tshuaj IV tuaj yeem siv los ntawm IO thiab.

Physiologically, lub pob txha pob txha kab noj hniav yog ib tug "tsis yog-collapseable rigid qhov chaw" - tsis zoo li peripheral veins uas yuav compressed los ntawm poob siab, uas yog vim li cas nyob rau hauv cov mob hnyav hypovolemia, IO yog tiag tiag txhim khu kev qha tshaj IV.

II. Tsib "Yuav tsum Siv IO" Battlefields

Scenario: Vim li cas IV ua tsis tiav? Tus nqi ntawm IO

Tawm- ntawm- tsev kho mob / Hauv - tsev kho mob plawv nres: Tsis muaj mem tes → Peripheral veins collapse; Tsis yooj yim tuav CPR txoj hauj lwm rau lub sij hawm ntev thiab tsis tuaj yeem palpate cov hlab ntsha. Tibial proximal tuaj yeem punctured li ntawm 10 vib nas this, thiab cov tshuaj tuaj yeem nkag mus rau hauv nruab nrab.

Kev raug mob hnyav / Hypovolemic shock (ntshav poob siab): Cov kua dej loj heev resuscitation + cev qhuav dej ntawm cov ntshav siab → Veins ploj; Sab nraum zoov ib puag ncig nrog teeb pom kev tsis zoo. Tsis tas yuav palpate lub mem tes; Tsuas yog kov cov pob txha txaus - cov pob txha yuav tsis nkaum.

Kev kub ntxhov rau menyuam yaus: Cov menyuam mos thiab menyuam yaus muaj cov leeg nyias nyias thiab cov ntshav ntim tsuas yog ~ 70-80 mL / kg. Kev sim IV siv sijhawm ntev npaum li lub sijhawm poob ntshav. PALS qhia meej txog IO raws li txoj kev xav tau ceev ceev; Tibial proximal yog qhov ruaj khov tshaj plaws.

Loj - cheeb tsam kub hnyiab / mob hnyav / rog: Distorted lub cev nto landmarks, veins obscured los ntawm edema los yog hlawv. IO yuav tsum tau "punctured downward mus rau ib qho nyuaj cheeb tsam," bypassing lub uncertainty ntawm lub cev nto.

Kev puas tsuaj / Tub rog cawm / Thaum lub sij hawm thauj: Bumpy ib puag ncig, qaug zog ntawm cov neeg ua haujlwm, cov khoom siv tsawg. Phau ntawv IO (caij nplooj ntoos hlav / rotational) tuaj yeem ua haujlwm yam tsis muaj hluav taws xob thiab yog qhov cuam tshuam rau ib puag ncig cuam tshuam.

Clinically, ib qho lus hais mus: "IO tsis hloov IV zoo, tab sis thaum tsis zoo IV, IO tuaj yeem yuav rov qab qee lub sijhawm rau tus neeg mob lub neej."

III. Qhov Yuav Tsum Tau Ua Tom Qab Peb IO Tsav Tsheb Architectures: Cov Pins Yuav Tsum Muaj Zog.

Niaj hnub no, kev kho mob IO ecosystem tau muab faib ua peb txoj hauv kev loj. Txawm li cas los xij, tsis hais txoj hauv kev twg raug xaiv, qhov kev ntseeg siab ntawm lub koob nws tus kheej yog qhov kawg txwv:

A. Phau ntawv / Jamshidi-style (Manual / Jamshidi-hom)

Tus kws phais tuav tus kov, ntxig rab koob perpendicularly mus rau hauv cov pob txha nto, thiab tig nws mus rau pem hauv ntej - zoo li zawm ib tug ntoo ntsia hlau. Qhov zoo yog nyob ntsiag to, wireless, thiab pheej yig tshaj; Lub cev tsis muaj zog yog qhov hnyav heev rau cov neeg laus cov pob txha, ntau lub caj npab lub zog thiab txhais tes xav tau kev cob qhia, thiab thaum qaug zog, lub zog yuav tsis ruaj khov → swb → rab koob khoov / qhov zawj yog khawb tawm ntawm pob txha nto → tsis ua haujlwm.

B. Roj teeb -Powered Drill Type (Powered / EZ-IO Style)

Lub roj teeb uas siv tau rov siv tau tuaj yeem tuav cov pawg koob pov tseg. Lub trigger activates lub cev muaj zog, uas rotates thiab propels. Lub sij hawm ntxig tuaj yeem ua rau qis dua 10 vib nas this, nrog kev ua tiav siab (qhia hauv cov ntaub ntawv ~ 95%). Txawm li cas los xij, qhov yuav tsum tau ua rau lub cev koob yog raws li hauv qab no: Kev sib kis torque yuav tsum tsis txhob ua rau lub Hub cais tawm ntawm lub raj lub cev, thiab tsis tso cai rau cov tub ntxhais kom thim rov qab - tag nrho cov kev sib txuas sib txuas yuav tsum tiv taus torsion.

C. Caij nplooj ntoos hlav-loaded (Lub caij nplooj ntoos hlav- qhib / BIG Hom)

Rub tus txhais tes tso tawm lub zog lub caij nplooj ntoos hlav uas khaws cia, ua rau rab koob tho los ntawm lub cortex nrog "bang." Qhov zoo dua yog tias nws ceev heev thiab roj teeb -dawb; Qhov tsis zoo yog tias qhov cuam tshuam quab yuam yog qhov tseem ceeb → rab koob lub cev yuav tsum tau tiv taus lub sijhawm axial loads yam tsis muaj dabtsi yog khoov, flattening, lossis thim rov qab cov tub ntxhais.

Qhov peb yog tag nrho cov converging rau tib lub hom phiaj: Lub IO tus pin withstands complex loads ntawm lub sij hawm tseem ceeb - axial siab + rotational torque + intermittent cuam tshuam + pob txha khib nyiab kev sib txhuam - thiab nws tsis tuaj yeem khoov, tsis tuaj yeem thim cov tub ntxhais, tsis tuaj yeem txhaws, thiab tsis tuaj yeem tawg.

IV. "Poob Kev Tiv Thaiv" Xav: Cov khoom siv yuav tsum pab tus neeg siv thiab yuav tsum tsis txhob ua rau muaj kev cuam tshuam.

Qhov taw qhia ua tiav rau IO tsis yog "pom cov ntshav ntws rov qab" (tsuas yog 80-85% tuaj yeem ua tiav zoo; tsis ua tiav ≠ txoj haujlwm tsis raug), tab sis:

Kev poob siab tsis zoo (pop / sudden change in tactile sensation): Lub tactile rhiab heev uas tshwm sim thaum lub sij hawm ntawm lub cortex rupture.

Lub koob tuaj yeem sawv ntsug (tuaj yeem sawv ntsug ntawm pob txha yam tsis tau rub tawm).

Tsis muaj bulge nyob rau hauv ceev saline infusion (flush test).

Ntawm peb lub ntsiab lus no, kev nruj ntawm rab koob, kev txiav kom huv ntawm rab koob tip edge (tsis muaj pob txha pob txha ncav cuag lub raj qhib), thiab xoom xoom xoom ntawm cov tub ntxhais - yeeb nkab haum txiav txim siab seb qhov kev xav tau dhau los ntawm "suab nrov." Khoov, thaiv, lossis tshee IO koob yuav tsim qhov poob qis (cov pob txha nto yog khawb nrog cov grooves, tsis yog qhov tseeb nkag) los yog tsis muaj qhov poob (lub koob lub taub hau tawm, ua rau slippage ntawm lub cortical nto), ncaj qha mus rau dhau - nkag los yog rov ua dua - thiab tus neeg mob yog nyob rau hauv lub thib plaub ntawm kev ntes.

V. Pediatrics: Pawg tsawg tshaj plaws muaj peev xwm ua yuam kev

Cov pob txha cortical ntawm qhov kawg ntawm tus menyuam lub tibia yuav tsuas yog 1-2 mm tuab, thiab sab hauv-kab tom qab ntawm lub medullary kab noj hniav kuj tseem ntiav. Cov ntsiab lus tseem ceeb rau kev tsim cov koob IO hauv cheeb tsam no dhau los ua:

Qhov tob-txoj kev txwv (adjustable retaining ring / stepped needle geometry): lub cev tiv thaiv dhau -kev nkag mus.

Cov lus tshwj xeeb zoo tab sis tsis tu ncua (kev txo qis hauv txoj kab uas hla ntawm 15G / 18G kev hloov pauv ntu).

Kev hnov ​​​​ntxhiab tsw: Cov koob yuav tsum tau txiav kom huv si - npub=ntau zog siv=mus dhau lub dermis nyias=mus rau hauv qhov sib koom ua ke / loj hlob phaj.

Qhov no yog vim li cas cov koob IO tsis yog "zoo tib yam koob nrog lub raj luv dua": cov kev qhia tshwj xeeb rau menyuam yaus tsim ib qho kev ywj pheej geometric system.

Xaus

Cov kev soj ntsuam ntawm cov koob IO tuaj yeem raug sau tseg rau hauv ib kab lus: Nws lub neej tsis yog rau "kab koob puncture", tab sis txhawm rau tshem tawm qhov tsis ua tiav ntawm "tsis muaj peev xwm tswj tau tshuaj yog tias tsis pom cov hlab ntsha." Nyob rau hauv lub qhov rais 90-thib ob, lub koob lub rigidity, txiav efficiency ntawm cov hniav, nruj ntawm lub hauv paus ntsiab lus haum, thiab nto smoothness - cov micron- theem tsis uas coj cwj pwm kaw nyob rau hauv lub rhiav los ntawm lub caj dab txo, tuag forging, sib tsoo, thiab electrolytic polishing kab ntawm clination tsis ua hauj lwm. Cov khoom siv tuaj yeem xaiv tau raws li phau ntawv / hluav taws xob laum / caij nplooj ntoos hlav, tab sis "lub koob tsis khoov, tsis thaiv, tsis zawv zawg, tsis xoob" yog qhov yuav tsum tau ua ua ntej rau txhua txoj kev xaiv.