![Qhov nce Aa gradient txhais li cas? Qhov nce Aa gradient txhais li cas?](https://i.answers-medical.com/preview/medical-health/13992390-what-does-an-increased-aa-gradient-mean-j.webp)
Video: Qhov nce Aa gradient txhais li cas?
![Video: Qhov nce Aa gradient txhais li cas? Video: Qhov nce Aa gradient txhais li cas?](https://i.ytimg.com/vi/A99Ik6C54e4/hqdefault.jpg)
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Qhov tseem ceeb thiab lub ntsiab lus
Ib qho A – a gradient rau cov neeg hluas uas tsis haus luam yeeb ua pa ua pa, nyob nruab nrab ntawm 5-10 mmHg. Feem ntau, A -a gradient nce nrog hnub nyoog. Ib qho txawv txav nce A-a gradient qhia qhov tsis xws luag hauv kev nthuav tawm, V/Q (qhov cua nkag/qhov sib piv) tsis sib xws, lossis txoj cai-rau-sab laug shunt.
Tom qab ntawd, ib tus tseem tuaj yeem nug, qhov Aa gradient siab txhais li cas?
Siab A-a gradient muaj feem xyuam nrog oxygen hloov pauv / roj pauv teeb meem. Cov no feem ntau cuam tshuam nrog kab mob alveolar membrane, kab mob sib kis lossis V/Q tsis sib xws. Hypoxemia nyob rau hauv lub ntsej muag ntawm ib txwm A-ib gradient implies hypoventilation nrog kev txav ntawm alveolar O2 los ntawm CO2 lossis lwm yam khoom.
Tsis tas li ntawd, koj txhais li cas Aa gradient? V. Kev txhais lus: Xam ib qho A-Gradient ib txwm muaj
- A-Gradient = (Hnub Nyoog/4) + 4.
- Cov neeg hluas ntawm cov dej hiav txwv. A-a nce 5 mus rau 7 mmHg rau txhua 10% nce FIO2. Chav Cua: 10 txog 20 mmHg. 100% oxygen: 60 txog 70 mmHg.
- Kev nce hnub nyoog cuam tshuam rau A-Gradient (ntawm qib hiav txwv) Hnub nyoog 20 xyoo: 4 txog 17 mmHg. Hnub nyoog 40 xyoo: 10 mus rau 24 mmHg.
Tsis tas li ntawd, Aa gradient txhais li cas?
Cov A-ib gradient , lub alveolar-arterial gradient , ntsuas qhov sib txawv ntawm cov pa oxygen hauv alveoli thiab cov hlab ntsha. Cov A-ib gradient Nws muaj cov txiaj ntsig tseem ceeb hauv kev kho mob vim nws tuaj yeem pab nqaim qhov kev kuaj mob sib txawv rau hypoxemia.
Vim li cas aa gradient nce hauv mob hawb pob?
A-ib gradient tau ntsuas ntawm lub pob ntseg lobe capillary ntshav, coj los ntawm huab cua hauv chav, thiab suav nrog siv qhov ntsuas cua zoo tagnrho, kho rau qhov ntsuas siab. Xaus Siab mob hawb pob yog txuam nrog ib nce A-a gradient . Cov A-ib gradient tej zaum yuav cuam tshuam txog kev ua pa ntawm txoj hlab pas hauv qhov hnyav mob hawb pob.
Pom zoo:
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