Vasovagal reactions in blood donors.
The donor records of a hospital blood bank, analyzed from a statistical standpoint demonstrated a low incidence of vasovagal reactions: 119 in 10,547 donations (1.13%). Donors of younger age and of lower diastolic blood pressure were more prone to reaction. There was no significant sex difference. Higher reaction rates were also associated with first-time donation, the time of year (spring), and a particular phlebotomist. The low reaction rate and the clearly demonstrated psychologic factors in the present study were attributed to a reflection of the small amount (200 ml) of blood withdrawn. The importance of the phlebotomist-donor relationship was stressed.
D000328:Adult; D000375:Aging; D001782:Blood Donors; D001815:Bloodletting / Q000009:adverse effects*; D001835:Body Weight; D003971:Diastole; D005260:Female; D006801:Humans; D008297:Male; D012621:Seasons; D014630:Vagus Nerve / Q000503:physiopathology*; D014652:Vascular Diseases / Q000209:etiology* / Q000503:physiopathology