70. Which of the following blood collection systems uses interchanging multi-sample tubes that allow a phlebotomist to draw several blood specimens at the same time?
Answer: A
Evacuation system
The evacuation system uses interchanging multi-sample tubes that allow a phlebotomist to draw several blood specimens simultaneously, making it an efficient choice for blood collection.
A) Evacuation system
This option is correct as the evacuation system is specifically designed for collecting multiple blood samples through a single venipuncture. It utilizes vacuum-sealed tubes that can be easily exchanged, streamlining the process of obtaining various specimens without requiring additional needle insertions.
B) Hypodermic and syringe system
The hypodermic and syringe system does not allow for multiple samples to be collected simultaneously. Instead, it involves drawing blood into a syringe, which requires a separate procedure for each sample, making it less efficient for collecting multiple specimens at once.
C) Winged infusion and syringe system
Although the winged infusion set is useful for drawing blood, it typically does not support the interchange of multiple tubes during the same venipuncture. This system is more suited for smaller veins and usually collects one sample at a time, unlike the evacuation system.
D) Lancet microcollection system
The lancet microcollection system is primarily used for collecting small blood samples via fingerstick, which is not applicable for drawing multiple specimens at once. It is designed for capillary blood collection, and therefore does not function like the evacuation system.
Conclusion
The evacuation system is the definitive choice for collecting multiple blood samples efficiently due to its design for interchanging multi-sample tubes. Other options, including the hypodermic and syringe system, winged infusion system, and lancet microcollection system, do not provide the same capability, making them less suitable for simultaneous specimen collection.