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PPL » Human Factors » Blood Donation

10.34 Blood Donation

10.34.2 Describe the effect on the body of donating blood.

Donating blood can have several temporary effects on the body of a pilot.

1. Decreased blood volume

Donating blood causes a temporary decrease in circulating blood volume.

This may result in:

  • light-headedness;
  • dizziness;
  • weakness; or
  • fainting.

 

2. Reduced oxygen-carrying capacity

Blood donation temporarily reduces the number of red blood cells available to carry oxygen around the body.

This can increase susceptibility to hypoxia, particularly when flying at altitude.

 

3. Fatigue and reduced performance

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