Vasovagal events can range in severity.
When assessing a donor’s eligibility to continue to donate following a previous vasovagal event, the Registered Health Care Professional should consider:
- Any contributory factors before and after the donation?
- Was there prolonged recovery after the previous vasovagal event?
- Did the donor sustain an injury?
- Did the donor require treatment from a Health Care Professional outside the blood service?
An unexplained delayed faint occurs when there is no obvious reason for the faint, other than the history of donation. Events that might contribute to a delayed faint would be exertion, dehydration, exposure to an unpleasant situation, or standing for prolonged periods.
A previous history of faints increases the likelihood of a severe adverse reaction to donation.
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