Usebenzisa le ncazelo, ungafingqa yini ukuthi kungani ukuphefumula ngokweqile kubhekwa njengokuyingozi?
Context:Ngokuvamile kucatshangwa ukuthi ukuphefumula ngokweqile ngokuzithandela ngaphambi kokuqala kokuphefumula ngokuzithandela kuvumela umuntu ohilelekile ukuba abambe umoya ngokuphepha isikhathi eside. Eqinisweni, kuyokwenza umuntu abe nomuzwa wokuthi akudingeki aphefumule, kuyilapho umzimba empeleni unomoya-mpilo ophakeme egazini obengase ngokuvamile, futhi ngokungaqondile, ubangele ukuphefumula kanzima futhi ekugcineni kuphazamise ukuphefumula. Abanye baye bathi umphumela wokuphefumula ngokweqile ubangelwa ukwanda komoya-mpilo egazini, bengaqapheli ukuthi empeleni ubangelwa ukwehla kwe-CO2 egazini nasemaphashini. Igazi eliphuma emaphashini ngokuvamile ligcwele umoya-mpilo, ngakho ukuphefumula umoya ovamile ngokweqile akukwazi ukwandisa inani lomoya-mpilo okhona, njengoba umoya-mpilo osegazini uyisici esiqondile. Ukwehlisa izinga le - CO2 kwandisa i - pH yegazi, ngaleyo ndlela kwandise isikhathi ngaphambi kokuba igazi libe ne - acid ngokwanele ukuze isikhungo sokuphefumula sivuselelwe, njengoba kuchazwe ngenhla. Isifiso esiyinhloko sokuphefumula sibangelwa ukwanda kwamazinga e-carbon dioxide (CO2) egazini. I - carbon dioxide iyanqwabelana egazini lapho i - oxygen igaywa futhi idinga ukukhishwa njengomkhiqizo olahlwayo. Umzimba uthola amazinga e-carbon dioxide ngokunembile kakhulu futhi uncike kulokhu njengento eyinhloko elawula ukuphefumula. Ukuphefumula ngokweqile kunciphisa ngokuphindaphindiwe izinga lokuphumula le-carbon dioxide okubangela isimo se-carbon dioxide ephansi egazini esibizwa ngokuthi i-hypocapnia. I-hypocapnia inciphisa ukuphefumula, okuvumela ukubambezeleka kokuphefumula futhi kushiye umcukuzi esengozini yokulahlekelwa ukwazi ngenxa ye-hypoxia. Kubantu abaningi abaphilile, uphawu lokuqala lokwehla kwamazinga omoya-mpilo ukuguga noma ukuphelelwa ukwazi: akukho lutho emzimbeni oluxwayisa umcukuzi ngokushaqeka kwengqondo okuseduze. Uma umuntu elahlekelwa ukwazi ngaphansi kwamanzi, kunengozi enkulu yokuthi uyominza. Umuntu ohamba naye lapho ebhukuda noma umsizi oseduze angaba sesimweni esingcono kakhulu sokumsindisa. Ukuphelelwa amandla okuphefumula okungaguquguquki (static apnea blackout) kwenzeka lapho umuntu ongaphansi kwamanzi engaphuzi ephefumula isikhathi eside ngokwanele ukuba umoya-mpilo osegazini wehle ube ngaphansi kwalokho okudingwa ubuchopho ukuze bugcine ukwazi. Akuhileli ushintsho ekucindezelekeni komzimba futhi ngokuvamile kwenziwa ukuze kuthuthukiswe isikhathi sokubamba umoya. Akufanele neze kwenziwe wedwa, kodwa ngaphansi kwezindlela eziqinile zokuphepha kunonogada wokuphepha noma imishini eceleni komcukuzi.
Ukuphefumula ngokweqile akukhulisi inani lomoya-mpilo okhona kodwa kunciphisa amazinga e-carbon dioxide (CO2) egazini nasemaphashini. Ngenxa yokuthi isifiso esiyinhloko sokuphefumula sibangelwa ukwanda kwamazinga e-carbon dioxide, kunikeza umbono oyiphutha wokuthi umuntu akadingi ukuphefumula. Lokhu kungaholela ekulahlekelweni ukwazi ngokuzumayo. Uma lokhu kwenzeka ngaphansi kwamanzi, kunengozi enkulu yokuminza. Yingakho ukuphefumula ngokweqile kubhekwa njengokuyingozi futhi kufanele kugwenywe.