Ithuluzi Lokuhlola Lokubalulekile Lokusiza Ukuhlola AmaGesi Wegazi
Ukucindezela okuncane kwe-oxygen, eyaziwa nangokuthi i-PaO2, isilinganiso se-oksijeni egazini legazi. Kubonisa indlela oksijini ekwazi ngayo ukuhamba emapapheni ukuya egazini.
I-PaO2 ingenye yezingxenye ezilinganiselwe ekuhlolweni kwegazi lokugaya igazi (ABG) , elibuye libike nge-carbon dioxide, i-bicarbonate (i-HCO3), kanye nezinga le-pH ngamaseli abomvu egazi. Ububanzi obuvamile bokucindezela okuyingxenye yomoya okwezinga elwandle ku-75 kuya ku-100 mm Hg.
Bona ukuthi lokhu kusho ukuthini, izici ezithonya, nokuthi yini engayitshela udokotela wakho mayelana nempilo yakho.
Ukuqonda Ukucindezelwa Okuyingxenye
I-oksijeni yenza cishe amaphesenti angu-21 wegesi egazini lakho. Ukucindezelwa kwazo zonke izigesi oziphefumulayo (i-oxygen, i-nitrogen, i-carbon dioxide) cishe ngamamitha angu-760 we-mercury (mm Hg) olwandle.
Ezindaweni eziphakeme kakhulu, ukunyuka komfutho wezinga lomkhathi kubangelwa ukucindezela kwegazi lakho, kuhlanganise nokucindezela okuyingxenye yomoya-mpilo. Amazinga aphansi ahamba, kancane kancane uyakwazi ukuhambisa umoya-mpilo kusuka emaphashini akho uye egazini lakho.
Lokhu kusiza ukuthi kungani abanye abantu bekhathazeka ukuphefumula ezindaweni eziphakeme, noma ngisho nasezindizeni zokuhweba lapho ukucindezelwa ekamelweni elilinganayo kufana nokuba cishe ngamamitha angu-4 000 kuya ku-10 000 ngaphezu kolwandle.
Kungani Ukulinganisa i-PaO2 Kubalulekile?
Ngomoya ngamunye owathathayo, i-oksijeni ingeniswa emaphashini futhi ihanjiswa e- alveoli .
I-alveoli yilapho kudluliselwa oksijini ne-carbon dioxide.
Ukucindezela okuyingxenye yinkimbinkimbi echaza ukuthi kungani umoya we-oxygen usuka e-alveoli ungena egazini nokuthi kungani i-carbon dioxide isuka egazini eya e-alveoli. Ngenxa yokuthi ukucindezela okuncane kwe-oksijeni kuphakeme e-alveoli kunama-capillari eseduze, igeleza kuma-capillaries .
Ngokufanayo, njengoba ingcindezi encane ye-carbon dioxide iphakeme kuma-capillaries kune-alveoli, ihamba ukusuka kuma-capillaries kuya e-alveoli.
Noma yiziphi izinguquko ekucindezelekeni okuyingxenye zingenza oksijini encane ingene egazini kanye nokuningi kwe-carbon dioxide eqoqa egazini. Ayikho yalezi zimo kubhekwa njengelungile. Kwezinye izimo, njenge- hypoxemia , kungaba yingozi.
Izinto ezithinta amazinga we-PaO2
Uma umzimba usebenza ngendlela evamile, i-PaO2 ejwayelekile iphakathi kuka-75 no-100 mm Hg. Uma i-PaO2 yakho ingaphansi kwalokhu, kusho ukuthi awutholi oksijini okwanele.
Kunezinto eziningi ezingathinta amazinga akho we-PaO2. Zihlanganisa:
- Ukucindezela okuncane kwe-oksijeni emoyeni oyifumbayo (izindawo eziphakeme kakhulu kuya ezindaweni eziphansi)
- Izivimbelo emthini wokuphefumula wamaphaphu akho (okubangelwa izimo ezifana ne- emphysema noma i- pulmonary fibrosis )
- Ukuhlushwa kwe- hemoglobin emaqenjini akho egazi (ukuba ne-insufficient yensimbi kusho ukuthi igazi lakho likwazi ukugxila kuma-molecule amaningi e-oxygen)
- Isimo senhliziyo yakho
Kungani ukuhlola kwe-PaO2 kwenziwa
I-PaO2, njengengxenye yesilingo se- ABG , isetshenziselwa ukuxilonga izimo ezithile noma ukuhlola impendulo yomuntu empilweni, kuhlanganise:
- Ukuhlola izifo zamaphaphu ezifana nesifo se-asthma, i-cystic fibrosis, noma isifo se-chronic obstructive pulmonary (COPD)
- Ukulinganisa izinga le- acid-base egazini lakho uma unesifo sezinso, ukwehluleka kwenhliziyo, isifo sikashukela esingalawulwayo, noma isifo esinamandla
- Ukuqinisekisa ukuthi uthola umthamo ofanele we-oksijeni uma usevini
- Ukuhlola ukuthi uphendula kanjani kahle ukwelashwa kwezifo zamaphaphu noma ukuhlukunyezwa
> Imithombo:
> Amagesi Wegazi. Ilabhulali Kazwelonke Yezokwelapha yase-US. I-Medline Plus. https://medlineplus.gov/ency/article/003855.htm.
> Carreau A, El Hafny-Rahbi B, Matejuk A, Grillon C, Kieda C. Kungani ukucindezela okwenyuka kwe-oksijeni kwezicubu zomuntu kuyi-parameter ebalulekile? Ama-molecule amancane ne-hypoxia. I-Journal ye-Cellular and Molecular Medicine . 2011; 15 (6): 1239-53.