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Questions and Answers
What is the specific gravity of the copper sulfate solution used in the test?
What is the specific gravity of the copper sulfate solution used in the test?
- 1.053 (correct)
- 1.050
- 1.070
- 1.060
What happens to a drop of blood that falls into a copper sulfate solution of specific gravity 1.053?
What happens to a drop of blood that falls into a copper sulfate solution of specific gravity 1.053?
- It dissolves immediately
- It becomes encased in a sac of copper proteinate (correct)
- It sinks to the bottom
- It floats to the surface
What is a limitation of this test?
What is a limitation of this test?
- It is too time-consuming
- It is too expensive
- It has a subjective end point (correct)
- It is only used in rare cases
Why may this test give false-negative results?
Why may this test give false-negative results?
What can cause falsely high values of Haemoglobin in this test?
What can cause falsely high values of Haemoglobin in this test?
How much error is introduced into the Haemoglobin concentration for each gram of protein increase above 7.4g/100mL?
How much error is introduced into the Haemoglobin concentration for each gram of protein increase above 7.4g/100mL?
What is a possible consequence of incorporating air bubbles into the test?
What is a possible consequence of incorporating air bubbles into the test?
Why was a donor with < 8g/dl of Haemoglobin able to pass the test?
Why was a donor with < 8g/dl of Haemoglobin able to pass the test?
What other proteins are precipitated by copper sulfate?
What other proteins are precipitated by copper sulfate?
What happens to the drop of blood if its specific gravity is higher than the solution?
What happens to the drop of blood if its specific gravity is higher than the solution?
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