Should I donate my own blood before surgery?

April 16, 2001

Patients undergoing open-heart surgery frequently require one or more blood transfusions. In an effort to reduce their chance of receiving blood from volunteer donors, patients facing open-heart surgery may choose to donate their own blood before surgery.

However, these patients are at increased risk of receiving any transfusion, which in turn, increases their risk of acute hemolytic reaction due to human error and of infection due to bacterial contamination of blood during collection or storage.

To help patients decide whether to donate their blood before surgery, Dr. Curry Grant and colleagues designed a decision aid comprising a booklet and audiotape and assessed its effectiveness. The authors tested 59 patients' knowledge of blood donation and transfusion, their perception of risks involved and their decisional conflict before and after use of the aid. The authors report that mean knowledge scores increased, from 67% before to 85% after use of the aid, and risk perception improved, from 0%-14% correct responses before to 18%-60% correct responses after.

The study found that while the decision aid had little effect on the choices of those who had strong opinions before using the material, it did help those who were initially uncertain. "The decision aid may potentially benefit patients by improving their knowledge and expectations, and by helping those who are uncertain to make choices," conclude the authors.

Evaluation of a decision aid for patients considering autologous blood donation before open-heart surgery.
Contact: Dr. Curry Grant, Institute for Clinical Evaluative Sciences, Toronto; tel: 416-480-4055 x3889

Canadian Medical Association Journal

Related Perception Articles from Brightsurf:

Intelligent cameras enhance human perception
A team of FAU researchers has developed an intelligent camera that achieves not only high spatial and temporal but also spectral resolution.

New perception metric balances reaction time, accuracy
Researchers at Carnegie Mellon University have developed a new metric for evaluating how well self-driving cars respond to changing road conditions and traffic, making it possible for the first time to compare perception systems for both accuracy and reaction time.

Sweet-taste perception changes as children develop
While adults prefer levels of sweetness similar to typical soft drinks, children and adolescents are less sensitive to the taste and prefer concentrations that are 50% sweeter, according to research by professor of food science and human nutrition M.

Optogenetic odors reveal the logic of olfactory perception
Using optogenetic control, researchers have created an electrical signature that is perceived as an odor in the brain's smell-processing center, the olfactory bulb, even though the odor does not exist.

Vision loss influences perception of sound
People with severe vision loss can less accurately judge the distance of nearby sounds, potentially putting them more at risk of injury.

Why visual perception is a decision process
A popular theory in neuroscience called predictive coding proposes that the brain produces all the time expectations that are compared with incoming information.

How the heart affects our perception
When we encounter a dangerous situation, signals from the brain make sure that the heart beats faster.

Changing how we think about warm perception
Perceiving warmth requires input from a surprising source: cool receptors.

Rhythmic perception in humans has strong evolutionary roots
So suggests a study that compares the behaviour of rodents and humans with respect to the detection rhythm, published in Journal of Comparative Psychology by Alexandre Celma-Miralles and Juan Manuel Toro, researchers at the Center for Brain and Cognition.

Approaching the perception of touch in the brain
More than ten percent of the cerebral cortex are involved in processing information about our sense of touch -- a larger area than previously thought.

Read More: Perception News and Perception Current Events is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to