In a project we need 20 ml of blood, do we take this sample at a single time or twice (for instance 2 consecutive day)? What do we do with blood donation? Probably our patients are not willing to take 20 ml of blood at a time, also with a 20 ml syringe.
Not sure if quite understa your questions but here are some answers depending on what exactly you are looking fo.
a. For so many metabolic measurements, 10 ml of blood sample will suffice so no need to take more blood.
b. if your project would require blood sampling for for the successive days, you could simply collect 5 ml each time. That being said, 10 ml would still be an option.
c. In research setting, we usually use smaller tubes to avoid any possible fear/withdrawal of participants.
hope this helps a bit.
MK
Thanks Mojtaba,
We need about 20 ml of blood. This amount of blood should be taken once before the training period and once after the training period. Therefore, we must take 20 ml of blood once from our participants.
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