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Video: Dab tsi yog qhov ntim siab ntawm kev faib khoom?
![Video: Dab tsi yog qhov ntim siab ntawm kev faib khoom? Video: Dab tsi yog qhov ntim siab ntawm kev faib khoom?](https://i.ytimg.com/vi/2B5-drS437w/hqdefault.jpg)
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Txhais/Taw qhia
Tshuaj nrog a siab Vd muaj lub siab xav tawm ntawm cov ntshav thiab nkag mus rau hauv cov hlab ntsha hauv lub cev, txhais tau tias a siab dua yuav tsum tau txhaj cov tshuaj kom ua tiav cov ntshav plasma concentration. ( Siab Vd -> Ntau dua faib mus rau lwm cov ntaub so ntswg)
Tib neeg kuj nug tias, qhov ntim loj ntawm kev faib tawm txhais li cas?
Qhov no txhais tau tias tias feem ntau ntawm cov tshuaj yog nyob rau hauv cov ntaub so ntswg, thiab tsawg heev nyob hauv cov ntshav ncig. Qhov loj dua qhov ntim ntawm kev faib tawm , qhov ntau dua uas cov tshuaj muaj nyob rau hauv cov ntaub so ntswg ntawm lub cev. Qhov me me ntim faib , qhov ntau dua uas cov tshuaj muaj nyob rau hauv lub circulatory system.
Dab tsi yog qhov ntim ntawm kev faib khoom siv rau? Ntim ntawm kev faib khoom (V) yog thawj PK qhov ntsuas uas cuam tshuam nrog kev ntsuas tshuaj ntsuas hauv ntshav lossis ntshav rau cov tshuaj hauv lub cev thiab yog siv rau qhia yeeb tshuaj faib . Nws yog qhov ntsuas tseem ceeb vim nws yog lub hauv paus tseem ceeb (ua ke nrog kev tshem tawm) ntawm cov tshuaj ib nrab-lub neej.
Ib yam nkaus, qhov ntim ntawm kev faib tshuaj yog dab tsi?
Hauv pharmacology, cov ntim faib (VD, tseem paub tias pom tseeb ntim faib ) yog theoretical ntim uas yuav tsim nyog kom muaj tag nrho cov nyiaj ntawm kev tswj hwm tshuaj ntawm tib lub siab uas nws tau pom hauv cov ntshav ntshav.
Qhov ntim ntawm kev faib tawm cuam tshuam rau kev tshem tawm li cas?
Ntim ntawm kev faib khoom per se tsis muaj cov nyhuv ntawm tshem tawm los yog qhov nruab nrab ntawm cov ntshav hauv lub xeev ruaj khov. Txawm hais tias kev hloov pauv ntawm cov ntaub so ntswg yuav cuam tshuam muab faib coefficient thiab pom meej ntim faib , tej kev hloov no yuav tsis muaj cov nyhuv nyob rau nruab nrab ntawm cov ntshav nyob ruaj khov ntawm cov tshuaj tag nrho lossis cov tshuaj dawb.
Pom zoo:
Dab tsi yog qhov sib txawv ntawm qhov kev cia siab rau qhov ntim thiab qhov ntim cia tseg?
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Qhov ntim cia tseg (ERV) yog cov pa ntxiv uas tuaj yeem nqus tau tom qab ua pa ib txwm. Nws yog qhov nyiaj khaws cia uas tuaj yeem nqus tau dhau qhov uas ib txwm muaj. Hloov pauv, qhov ua rau lub zog cia siab (IRV) yog qhov ntxiv ntawm huab cua uas tuaj yeem nqus tau tom qab nqus tau ib txwm
Qhov ntim ntawm kev faib khoom qhia dab tsi rau peb?
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Qhov ntim ntawm kev faib tawm qhia txog kev sib raug zoo ntawm cov tshuaj hauv lub cev ntawm lub xeev ruaj khov thiab cov tshuaj ntshav plasma. Qhov ntim ntawm kev faib khoom yog lub tswv yim ua lej, uas tsis tas yuav cuam tshuam txog lub cev lossis "qhov tseeb" qhov chaw faib khoom
Dab tsi yog qhov txiaj ntsig ib txwm rau PaO 2 Dab tsi yog qhov txiaj ntsig rau kev txiav txim siab qhov hnyav ntawm hypoxemia?
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Zoo li feem ntau qhov kev kho mob ib txwm muaj txiaj ntsig thiab ntau yam, lub ntsiab lus tuaj yeem sib txawv me ntsis, tab sis feem ntau cov ntsiab lus hauv qab no siv: Ua rau me me hypoxemia: PaO2 = 60 txog 79 mmHg. Qhov nruab nrab hypoxemia: PaO2 = 40 txog 59 mmHg. Hypoxemia hnyav: PaO2 <40 mmHg
Koj yuav daws qhov ntim ntawm kev faib khoom li cas?
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Qhov ntim ntawm kev faib tawm yog qhov muaj txiaj ntsig hauv kev kwv yees cov koob tshuaj uas yuav tsum tau ua kom tau txais cov ntshav plasma zoo li A = C · Vd, nrog A = tus nqi tshuaj hauv lub cev (≈ koob, tsis ntev tom qab kev tswj hwm) thiab C = ntshav siab
Qhov ntim zoo ntawm kev faib khoom yog dab tsi?
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Yog tias qhov ntim nruab nrab ntawm 7 4 thiab 15 7 L, cov tshuaj tau xav kom faib thoob plaws hauv cov ntshav (ntshav thiab ntshav liab). Yog tias qhov ntim ntawm kev faib tawm loj dua 42, cov tshuaj xav tau muab faib rau tag nrho cov ntaub so ntswg hauv lub cev, tshwj xeeb tshaj yog cov nqaij rog