Which of the following is caused by excessive shaking of a tube?
Hemophilia
Hemoconcentration
Hemolysis
Hemostasis
The Correct Answer is C
Choice A Reason:
Hemophilia is a genetic disorder that impairs the body's ability to make blood clots, a process needed to stop bleeding. This condition is not caused by shaking a blood collection tube; it is an inherited disorder typically caused by a mutation in one of the clotting factor genes.
Choice B Reason:
Hemoconcentration refers to an increase in the concentration of cells and solids in the blood, usually resulting from a loss of plasma. While this can occur due to various reasons, such as dehydration, it is not caused by shaking a blood collection tube. Shaking a tube does not change the ratio of cells to plasma in the blood.
Choice C Reason:
Hemolysis is the rupture of red blood cells, which can occur when a blood sample is handled roughly, such as by excessive shaking. This can cause the cells to break open and release their contents into the plasma, which can interfere with laboratory tests and lead to inaccurate results.
Choice D Reason:
Hemostasis is the process by which the body stops bleeding, which involves the clotting of blood. This process is not caused by shaking a blood collection tube. Hemostasis is a complex process that involves blood vessels, platelets, and clotting factors.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A Reason:
Hemostasis is the process of blood clotting and the cessation of bleeding. While it is a desired outcome following any puncture, squeezing the puncture site would not typically cause hemostasis as a complication. It is the body's natural response to injury to prevent excessive blood loss.
Choice B Reason:
Hemolysis refers to the rupture of red blood cells, which can occur when excessive pressure is applied to a puncture site during a capillary blood collection. This pressure can cause the cells to burst, releasing their contents into the plasma, which can interfere with various laboratory tests and lead to inaccurate results.
Choice C Reason:
Homeostasis is the body's ability to maintain a stable internal environment despite changes in external conditions. It is not a complication but rather a regulatory process. Squeezing a puncture site does not directly relate to homeostasis as a complication.
Choice D Reason:
Hypobilirubinemia is a condition where there is less than the normal amount of bilirubin in the blood. It is not a complication associated with squeezing a puncture site. Bilirubin levels are typically affected by liver function and red blood cell breakdown, not by the mechanical action of squeezing a site.
Correct Answer is C
Explanation
Choice A reason:
Holding the two slides at a 90-degree angle is not the correct technique for performing a blood smear. This angle is too steep and would not allow the blood to spread thinly across the slide, which is necessary for creating a quality smear that can be examined under a microscope.
Choice B reason:
Allowing the blood drop to clot slightly before performing the smear is not advisable. Clotting can interfere with the spread of the blood and the formation of a monolayer, which is essential for accurate microscopic examination. The blood should be fresh and anticoagulated to prevent clotting.
Choice C reason:
Holding the slides at a 30-degree angle is the correct technique for performing a blood smear. This angle allows the spreader slide to push the blood drop smoothly across the patient slide, creating a thin, even layer of blood that is ideal for microscopic analysis. The angle, speed, and pressure must be consistent to achieve a quality smear.
Choice D reason:
Allowing the blood drop to clot completely before performing the smear would make it impossible to create a smear. Clotted blood cannot be spread into a thin layer, which is necessary for microscopic examination of the blood cells.
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