Isixhobo soLwazi oluBalulekileyo lokuNceda ukuHlola iGases yeGazi
Uxinzelelo oluthile lwe-oksijeni, olubizwa nangokuthi i-PaO2, luyilinganiselo ye-oksijini egazini legazi. Ibonisa ukuba i-oksijeni ikwazi njani ukuhamba ukusuka kumaphaphu ukuya kwigazi.
I-PaO2 yenye yezinto ezilinganiswe kwisiganeko segazi (i-ABG) yokuhlolwa kwegazi (i-ABG) , esichaza i-carbon dioxide, i-bicarbonate (i-HCO3), kunye ne-pH level kwiiseli ezibomvu zegazi. Uhlobo oluqhelekileyo loxinzelelo oluthile lwe-oksijini elisezantsi lolwandle lu-75 ukuya kwi-100 mm Hg.
Jonga ukuba lithetha ukuthini, izinto ezichaphazelayo, nokuba yintoni enokuyichazela ugqirha wakho malunga nempilo yakho.
Ukuqonda Ukunyanzeliswa Kwezikhundla
I-oksijini yenza malunga neepesenti ezingama-21 zegesi egazini lakho. Uxinzelelo lwawo onke amagesi ophefumulayo (i-oksijeni, i-nitrogen, i-carbon dioxide) i-760 millimeters ye-mercury (mm Hg) kwinqanaba lolwandle.
Kwiindawo eziphakamileyo eziphezulu, ukwanda kweengcinezelo zemoya kubangelwa ukuphazamiseka kweengcingo zegazi lakho, kubandakanywa uxinzelelo oluthile lwe-oksijini. I-aphansi amanqanaba ahambayo, ngaphantsi unako ukuhambisa umoya-mpahla kwimiphunga yakho ukuya kwigazi lakho.
Oku kunceda ukucacisa ukuba kutheni abanye abantu banenkathazo yokuphefumla kwiindawo eziphakamileyo, okanye nakweenqwelo-moya zokuthengisa apho uxinzelelo kwi-cabin lilingana no-4,000 ukuya ku-10 000 ngaphezu kwezinga elwandle.
Kutheni ukulinganisa i-PaO2 kubalulekile
Ngomoya ngamnye owathathayo, i-oksijeni ifakwe kwimiphunga kwaye ihanjiswa kwi- alveoli .
I-alveoli apho ukutshintshwa kwe-oksijini ne-carbon dioxide kwenzeka khona.
Uxinzelelo olusisigxina luyinto ecacileyo eyenza i-oksijeni isuke kwi-alveoli ibe ngegazi kwaye kutheni i-carbon dioxide isuka egazini ibe yi-alveoli. Ngenxa yokuba uxinzelelo oluthile lwe-oksijeni luphakamileyo kwi-alveoli kunama-capillari angasondelene nalo, luya kwi-capillaries .
Ngokufanayo, ekubeni uxinzelelo oluncinane lwe-carbon dioxide luphezulu kuma-capillaries kune-alveoli, luhamba ukusuka kuma-capillaries ukuya kwi-alveoli.
Naluphina utshintsho kwixinzelelo oluthile lunokubangela ukuba i-oxygen encinci ingene egazini kunye ne-carbon dioxide engaphezulu egazini. Ayikho na yale miqathango ithathwa njengento efanelekileyo. Kwezinye iimeko, njenge- hypoxemia , inokuba yingozi.
Izinto ezichaphazela amaNqanaba ePao2
Xa umzimba usebenza ngokuqhelekileyo, i-PaO2 eqhelekileyo iphakathi kwe-75 ne-100 mm ye-Hg. Ukuba iPoO2 yakho ingaphantsi kweli, kuthetha ukuba awufumani oksijini.
Kukho inani lezinto ezinokuchaphazela amazinga akho ePaO2. Ziquka:
- Uxinzelelo oluthile lwe-oksijini yomoya ophazamisayo (ukuphakama kwezinga eliphezulu ukuya kwindawo ephantsi)
- Izivalo emthini wokuphefumula wemiphunga yakho (ebangelwa zizimo ezifana ne- emphysema okanye i- pulmonary fibrosis )
- Uxinzelelo lwe- hemoglobin kwiiseli zakho zegazi (ezinobunzima bentsimbi kuthetha ukuba igazi lakho liyakwazi ukuxhoma kuma-molecule amaningi e-oxygen)
- Imeko yentliziyo yakho
Kutheni ukuhlolwa kwePoO2 kwenziwa
I-PaO2, njengenxalenye yesilingo se- ABG , isetyenziselwa ukuxilonga imeko ezithile okanye ukuvavanya impendulo yomntu kunyango, kuquka:
- Ukuhlola izifo zemiphunga ezifana nesifo se-asthma, i-cystic fibrosis, okanye isifo esingavimbayo se-pulmonary disease (COPD)
- Ukulinganisa i- acid-base level egazini lakho xa unesifo senhliziyo, ukungaphumeleli kwentliziyo, isifo sikashukela esingalawulwayo, okanye isifo
- Ukuqinisekisa ukuba ufumana umlinganiselo ofanelekileyo we-oksijeni ukuba ukhona kwintambo
- Ukuvavanya indlela ophendula ngayo kakuhle unyango lwezifo zemiphunga okanye umonakalo
> Imithombo:
> Iigesi zeGazi. ILayibrari yeSizwe ka-US yamayeza. Medline Plus. https://medlineplus.gov/ency/article/003855.htm.
> I-Carreau A, i-El Hafny-Rahbi B, i-Matejuk A, i-Grillon C, i-Kieda C. Kutheni ukunyanzeliswa kwe-oksijeni yesikhokelo se-human tisser? Iinqununu ezincinane kunye ne-hypoxia. Umbhalo weeNyunithi kunye neeMilcular Medicine . 2011; 15 (6): 1239-53.