Ukungakwazi ukusebenza kwegazi kwenzeka lapho, ngaphansi kwemibandela yokuphila komuntu komuntu, uhlelo lwe-cardiovascular, alukwazi, nganoma yisiphi isizathu, lunikeze umzimba ngesilinganiso esidingekayo se-oxygen. Ezigaba zokuqala, kunzima ukuthola lesi sifo, ngoba kubonakala kuphela lapho umzimba ulayishwa kakhulu. Uma lesi sifo singelashwa, esikhathini esizayo sizozizwa sizizwa ngisho nokuphumula.
Ukuhlukaniswa kwamazwe
Kunezinhlobo eziningana eziyinhloko zalesi sifo:
1. I- Vascular , ebonakaliswa ukwehla kwevolumu yegazi elifika enhliziyweni isikhathi esithile. Kunezimbangela eziningana ezibalulekile zalokhu ukwehluleka komjikelezo:
- ukwephulwa kwe-permmeability ye-veins;
- ukulahlekelwa kwemali enkulu;
- ukuvimbela umkhuhlane we-venous.
Kunoma yikuphi, ukucindezeleka kwegazi kwehla ohlelweni lokujikeleza, okuholela ekwephuleni oksijini ezindaweni ezithile zomzimba kanye nomzimba wonke.
2. I- cardiac - ivela lapho umsebenzi we-mushyigu kanye nesiphambano wokuguqula umzimba. Izizathu eziyinhloko ziyi:
- ukutholakala okungenele kwegazi okusuka enhliziyweni;
- ukwandisa ivolumu yetshezi ohlelweni ngaphambi kokulimala;
- Umsebenzi ongaphelele wemisipha we-ventricle eyodwa noma ngaphezulu.
3. Ukuhluleka kokujikeleza okunamandla . Ihlukaniswa ibe yi-syndromes eziningana ezinkulu:
- ukuphazanyiswa kwesinye sezinguquko;
- ukungakwazi ukusebenza kwenhliziyo.
Konke lokhu kuholela emithwalweni eyengeziwe hhayi kuphela emisipha eyinhloko, kodwa nasemzimbeni wonke, ochaphazela impilo yansuku zonke yomuntu. Uma ungaqali ukwelashwa ngesikhathi, leli fomu lingase libi kakhulu.
4. Ukuhluleka kokujikeleza kwegazi. Ingahlukaniswa ngamaqembu amaningana amakhulu:
- I-degree elingu-1 iboniswa yi-tachycardia, i- dyspnea nokukhathala okwandayo;
- I-2 degree inezimpawu ezifanayo, kuphela ezibonakalisa esimweni sokuthula; ikhono lomuntu lokusebenza liyancipha kakhulu;
- I-3 degree ibonakaliswe amandla okulahlekelwa umsebenzi ngokuphelele.
Ukuntuleka okunamandla nokungapheli kudinga ukwelashwa okufanelekayo ngokulinganisela.
Ukungakwazi ukusebenza kwe-cerebral circulation
Ngokwehlukana, kubalulekile ukukhuluma ngokungasebenzi kahle kokusakaza kwe-cerebral. Esikhathini sohlelo lokuhlukanisa, libhekisela ekungeneni kwamathambo. Ngesikhathi esifanayo, lesi sifo kubhekwa njengengozi kakhulu, njengoba kuvame ukuholela ekukhubazekeni noma ngisho nokufa. Kubonakala:
- isiyezi;
- umsindo ezindlebeni ;
- ikhanda;
- ukuwohloka okukhulu kwenkumbulo.