Which of the following blood collection systems uses interchangeable multi-sample tubes that allow a phlebotomist to draw several blood specimens at the same time?
Evacuated tube system
Hypodermic needle and syringe system
Winged infusion set and syringe system
Lancet micro collection system
The Correct Answer is A
Choice A Reason:
The evacuated tube system is designed for the collection of multiple blood specimens using interchangeable tubes. This system utilizes a double-pointed needle, one end of which goes into the patient's vein and the other into a vacuum tube. As the blood is drawn, it automatically fills the tube until the vacuum is exhausted. The phlebotomist can then easily replace the filled tube with another without removing the needle from the patient's vein, allowing for multiple samples to be taken during a single venipuncture.
Choice B Reason:
The hypodermic needle and syringe system is typically used for manual blood draws when the evacuated tube system is not suitable, such as with small or fragile veins. This system does not use interchangeable tubes; instead, the blood is drawn into a syringe and then transferred into the appropriate tubes, which can be time-consuming and increase the risk of hemolysis or contamination.
Choice C Reason:
A winged infusion set, also known as a butterfly needle, is often used for patients with difficult veins. Like the hypodermic needle and syringe system, it does not inherently allow for the use of interchangeable multi-sample tubes. Blood is collected into a syringe or a single tube attached to the butterfly needle, and changing tubes usually requires a new puncture for each sample.
Choice D Reason:
The lancet microcollection system is used for capillary blood collection, typically from a fingerstick or heelstick. It is used for small volume samples and does not accommodate interchangeable multi-sample tubes. This method is commonly used for pediatric patients or when only a small amount of blood is needed.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A reason:
The patient's insurance provider name is not typically required on a CBC specimen label. While insurance information is crucial for billing purposes, it does not serve as an identifier for the specimen itself and is therefore not documented on the label.
Choice B reason:
The phlebotomist's full name is not a requirement for a CBC specimen label. The focus of documentation on the label is on patient identification and specimen integrity, not the identity of the healthcare professional collecting the specimen.
Choice C reason:
A phlebotomist's certification number is also not required on a CBC specimen label. While the phlebotomist's credentials are important for their professional status, they are not part of the necessary documentation for a specimen label.
Choice D reason:
The patient's identification number is a critical piece of information that must be documented on a CBC specimen label. This unique identifier links the specimen to the patient's medical record, ensuring that the test results are accurately recorded in the patient's health history.
Correct Answer is B
Explanation
Choice A Reason:
Pernicious anemia is a type of anemia caused by a deficiency of vitamin B12, which is not directly related to the volume of blood drawn. It is typically associated with the inability to absorb vitamin B12 from the gastrointestinal tract and is not a consequence of drawing blood.
Choice B Reason:
Iatrogenic anemia is the correct answer. It is a condition that can occur when too much blood is drawn from an infant, leading to anemia caused by medical intervention. Infants have a limited blood volume, and removing more than the recommended amount can significantly decrease their red blood cell count, resulting in anemia.
Choice C Reason:
Hyperthermia refers to an abnormally high body temperature, which is not a direct result of drawing blood. It is more commonly associated with environmental factors, infections, or other medical conditions that cause the body's temperature regulation to fail.
Choice D Reason:
Hypothermia is a condition where the body temperature drops below the normal range, which is also not a direct consequence of drawing blood. It is typically caused by prolonged exposure to cold temperatures and is unrelated to the volume of blood drawn from an infant.
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