A phlebotomist should recognize that proper hand hygiene can result in which of the following?
A decrease in the incidence of health care-associated infections
An increase in the accuracy of laboratory results
A decrease in the rejection of laboratory specimens
An increase in the potential sources of pathogens
The Correct Answer is A
Choice A Reason:
Proper hand hygiene is one of the most effective measures to prevent the spread of infections within health care settings. By thoroughly cleaning hands, phlebotomists and other health care workers can significantly reduce the transmission of pathogens that can lead to health care-associated infections (HAIs). These infections are a major cause of morbidity and mortality among hospitalized patients and can be prevented by adhering to strict hand hygiene protocols.
Choice B Reason:
While hand hygiene is crucial for preventing contamination and infection, it does not directly increase the accuracy of laboratory results. The accuracy of laboratory results is more dependent on the proper collection, handling, and processing of specimens, as well as the precision of the testing equipment and methodologies used.
Choice C Reason:
Good hand hygiene can help decrease the rejection of laboratory specimens by preventing contamination. Contaminated specimens can lead to inaccurate results and may need to be recollected, which is inconvenient for the patient and can delay diagnosis and treatment. However, the primary outcome of proper hand hygiene is the prevention of HAIs, rather than the reduction of specimen rejection.
Choice D Reason:
Proper hand hygiene leads to a decrease, not an increase, in the potential sources of pathogens. By effectively removing germs from the hands, the risk of transmitting infectious agents is minimized. This is essential in a health care setting where patients may be vulnerable to infections due to weakened immune systems or open wounds.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A reason:
Turning the patient's hand palm down is not typically recommended as it can make the veins less accessible and may cause discomfort to the patient. The veins on the back of the hand are more superficial and can be more easily accessed when the hand is palm up.
Choice B reason:
Placing the patient in a supine position is not necessary for all venipuncture procedures and is usually reserved for patients who have a history of fainting or for those who are already lying down due to their medical condition. It is not a position that specifically increases comfort during the procedure.
Choice C reason:
Bending the patient's arm at the elbow can actually hinder the blood draw process as it may cause the veins to be less prominent and can lead to discomfort or movement during the venipuncture, potentially causing injury or an unsuccessful draw.
Choice D reason:
Positioning the patient's hand at waist level is the correct choice as it allows the arm to be in a natural, relaxed position, which can help the veins to be more prominent and accessible. It also helps in reducing the patient's anxiety as the arm is not in an awkward or strained position.
Correct Answer is B
Explanation
Choice A reason:
The order of citrate, heparin, EDTA, and fluoride is not the correct sequence for blood collection. The correct order is essential to prevent cross-contamination of additives between tubes, which could interfere with test results. Citrate tubes should be drawn first to ensure that the blood does not clot prematurely, but heparin should not follow immediately after citrate.
Choice B reason:
Citrate tubes, which contain sodium citrate, are used for coagulation tests and must be drawn first to ensure the proper blood-to-additive ratio. EDTA tubes are drawn next because EDTA binds calcium and prevents clotting, making it ideal for complete blood counts and other hematology studies. Heparin tubes, which prevent clotting by inhibiting thrombin and thromboplastin, are drawn after EDTA. Lastly, fluoride tubes, which contain a glycolysis inhibitor, are drawn to preserve glucose levels and are typically used for glucose and lactate testing.
Choice C reason:
Starting with fluoride is not recommended as it could lead to contamination of the EDTA and heparin tubes with fluoride, which could affect the results of certain tests, such as calcium determinations in heparin tubes. The order of draw is designed to minimize such risks.
Choice D reason:
This sequence is incorrect because fluoride tubes are not drawn before EDTA and heparin tubes. The presence of fluoride could potentially contaminate the subsequent tubes and alter the results of the tests that require heparin or EDTA as an anticoagulant.
In phlebotomy, following the correct order of draw is crucial. The order is established based on the type of additive in each tube and its potential to interfere with tests conducted in subsequent tubes. The standard order is: blood cultures, citrate tubes, serum tubes with or without clot activator and gel, heparin tubes with or without gel, EDTA tubes, and lastly, fluoride tubes. This sequence helps prevent cross-contamination and ensures the accuracy of laboratory results, which are critical for patient diagnosis and treatment.
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