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Analiza Hematocritul HCT – Globule rosii- La ce este buna?

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Hematocritul HCT

 Volumul ocupat de globulele rosii intr-un volum dat de sange,

  

Generalitati

·  Hematocritul este exprimat in procente

Valori normale

·  HCT Barbati 39-49%

·  HCT Femei  35-45%

Creste

·  In dezhidratarea organismului (prin febra, varsaturi, transpiratie)

Scade

·  In anemii (pierderi mari de sange, boli infectioase, lipsa de fier si vitamine, intoxicatii cu substante chimice, subnutritie etc.)

·  Cand se consuma prea multe lichide inainte de recoltarea sangelui

Hematocrit

 Definitie

Reprezinta masa de hematii (globule rosii) dintr-un anumit volum de sange. Procedeul consta in recoltarea sangelui dintr-o vena, apoi acesta se combina cu o substanta antiocoagulanta si se repartizeaza intr-un tub de sticla foarte ingust, care se centrifugheaza puternic la o centrifuga. In urma acestei operatii se observa separarea sangelui in stratul superior (plasma) si stratul inferior, format din globule rosii, care constituie hematocritul.



Hematocritul se poate defini ca fiind volumul stratului de globule rosii (in procente) fata de volumul total al sangelul din tubul de sticla.

Valori normale 

  • la barbati = 40-48%
  • la femei = 36-42%
  • la copii 2-15 ani = 36-39%.

Cresteri patologice

Se intalneste rar, cand se pierde multa apa din corp prin transpiratie, prin febra, prin varsaturi (deshidratare) precum si in boala care se caracterizeaza prin cresterea exagerata a numarului de globule rosii (poliglobulie).

Scaderi patologice

Se observa in anemii, in pierderea de sange sau cand se consuma multe lichide inainte de recoltarea sangelui. Hematocritul, alaturi de numaratoarea globulelor rosii si de dozarea hemoglobinei, ajuta la punerea unui diagnostic mai precis de anemie

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