10 Questions
What is the specific gravity of the copper sulfate solution used in the test?
1.053
What happens to a drop of blood that falls into a copper sulfate solution of specific gravity 1.053?
It becomes encased in a sac of copper proteinate
What is a limitation of this test?
It has a subjective end point
Why may this test give false-negative results?
Due to various sources of error
What can cause falsely high values of Haemoglobin in this test?
Abnormally raised protein levels
How much error is introduced into the Haemoglobin concentration for each gram of protein increase above 7.4g/100mL?
0.7g
What is a possible consequence of incorporating air bubbles into the test?
Falsely low Haemoglobin values
Why was a donor with < 8g/dl of Haemoglobin able to pass the test?
Due to high protein levels
What other proteins are precipitated by copper sulfate?
Proteins other than haemoglobin
What happens to the drop of blood if its specific gravity is higher than the solution?
It sinks to the bottom
This quiz assesses the knowledge of blood donor screening criteria and procedures to ensure safe blood donation. It covers the medical history, observation, and simple tests required to evaluate the health of potential blood donors.
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