Nursing practice questions with comprehensive rationales
NurseDive Free Nursing Practice Question
Which of the following parameters should a phlebotomist consider when selecting a blood collection method?
A. Patient condition, patient age, blood volume required
The patient's condition is a critical factor as it can influence the ease of blood collection and the choice of collection site. For example, a dehydrated patient may have less accessible veins. Patient age is also important; pediatric and geriatric patients may require different approaches due to vein size and fragility. The blood volume required for testing must be considered to ensure sufficient sample size without compromising patient safety, adhering to guidelines that limit blood collection to a certain percentage of the patient's total blood volume.
B. Patient height, patient gender, patient medications
While patient height and gender may influence the choice of blood collection site, they are not as critical as the factors listed in choice A. Patient medications are important to consider, as some medications may affect coagulation or the integrity of the sample.
C. Ordering physician, number of tests ordered, diagnosis
The ordering physician's preferences may be considered, but they are not a primary factor in the method of collection. The number of tests ordered and the diagnosis can influence the volume of blood needed but are secondary to the patient's condition and safety considerations.
D. Time of day, timing of specimen, test status
The time of day and the timing of the specimen collection can be important for certain tests that are time-sensitive or influenced by diurnal variations. The test status, whether routine or stat, may affect the urgency of collection but not necessarily the method of collection.
This question is an excerpt from Nurse Dive's nursing test bank - Phlebotomy Certification Proctored Exam 130. Take the full exam now
Full Explanation
Choice A Reason:
The patient's condition is a critical factor as it can influence the ease of blood collection and the choice of collection site. For example, a dehydrated patient may have less accessible veins. Patient age is also important; pediatric and geriatric patients may require different approaches due to vein size and fragility. The blood volume required for testing must be considered to ensure sufficient sample size without compromising patient safety, adhering to guidelines that limit blood collection to a certain percentage of the patient's total blood volume.
Choice B Reason:
While patient height and gender may influence the choice of blood collection site, they are not as critical as the factors listed in choice A. Patient medications are important to consider, as some medications may affect coagulation or the integrity of the sample.
Choice C Reason:
The ordering physician's preferences may be considered, but they are not a primary factor in the method of collection. The number of tests ordered and the diagnosis can influence the volume of blood needed but are secondary to the patient's condition and safety considerations.
Choice D Reason:
The time of day and the timing of the specimen collection can be important for certain tests that are time-sensitive or influenced by diurnal variations. The test status, whether routine or stat, may affect the urgency of collection but not necessarily the method of collection.
Similar Questions
Which of the following actions should a phlebotomist take when interacting with a patient who has a "Contact Precautions" sign on their door?
A. Don a gown prior to entering the patient's room and remove it before leaving the room.
When a patient is under "Contact Precautions," it is recommended that healthcare workers don a gown upon entering the patient's room. This is to prevent the spread of infection through contact with the patient or their environment. The gown should be removed before leaving the room to avoid contaminating other areas.
B. Don a face shield prior to entering the patient's room and remove it after leaving the room.
While a face shield may be necessary for certain procedures, it is not specifically required for "Contact Precautions." The primary concern with contact precautions is preventing the transmission of infections through touch, not through droplets, which is what a face shield would protect against.
C. Don a mask prior to entering the patient's room and remove it before leaving the room.
Donning a mask is not a standard requirement for "Contact Precautions" unless there is a risk of droplet transmission. In this scenario, the precautions are specifically for contact, and therefore, a mask alone would not be sufficient.
D. Don gloves after cleaning and evaluating the patient's venipuncture site.
Gloves should be donned before any potential contact with the patient or their immediate environment, not just after cleaning and evaluating the venipuncture site. Gloves are a critical component of PPE when dealing with patients under "Contact Precautions."
Full Explanation
Choice A Reason:
When a patient is under "Contact Precautions," it is recommended that healthcare workers don a gown upon entering the patient's room. This is to prevent the spread of infection through contact with the patient or their environment. The gown should be removed before leaving the room to avoid contaminating other areas.
Choice B Reason:
While a face shield may be necessary for certain procedures, it is not specifically required for "Contact Precautions." The primary concern with contact precautions is preventing the transmission of infections through touch, not through droplets, which is what a face shield would protect against.
Choice C Reason:
Donning a mask is not a standard requirement for "Contact Precautions" unless there is a risk of droplet transmission. In this scenario, the precautions are specifically for contact, and therefore, a mask alone would not be sufficient.
Choice D Reason:
Gloves should be donned before any potential contact with the patient or their immediate environment, not just after cleaning and evaluating the venipuncture site. Gloves are a critical component of PPE when dealing with patients under "Contact Precautions."
Which of the following tests is performed to identify bacteremia?
A. Glucose tolerance test
A glucose tolerance test is used to diagnose diabetes by measuring the body's response to glucose over a period of time. It is not used to identify bacteremia, which is the presence of bacteria in the bloodstream.
B. Peripheral blood smear
A peripheral blood smear involves examining a sample of blood under a microscope to look for abnormalities in blood cells. While it can reveal signs of infection, it does not specifically identify bacteremia.
C. Blood culture
A blood culture is the primary test used to detect bacteremia. It involves taking a sample of blood and incubating it to see if bacteria grow, which would indicate the presence of bacteria in the bloodstream.
D. Lactic acid
Lactic acid levels in the blood are measured to assess the severity of sepsis, a condition that can result from bacteremia. Elevated lactic acid can indicate that tissues are not getting enough oxygen, but the test itself does not identify bacteremia.
Full Explanation
Choice A Reason:
A glucose tolerance test is used to diagnose diabetes by measuring the body's response to glucose over a period of time. It is not used to identify bacteremia, which is the presence of bacteria in the bloodstream.
Choice B Reason:
A peripheral blood smear involves examining a sample of blood under a microscope to look for abnormalities in blood cells. While it can reveal signs of infection, it does not specifically identify bacteremia.
Choice C Reason:
A blood culture is the primary test used to detect bacteremia. It involves taking a sample of blood and incubating it to see if bacteria grow, which would indicate the presence of bacteria in the bloodstream.
Choice D Reason:
Lactic acid levels in the blood are measured to assess the severity of sepsis, a condition that can result from bacteremia. Elevated lactic acid can indicate that tissues are not getting enough oxygen, but the test itself does not identify bacteremia.
Which of the following purposes is served by anchoring the selected vein for a venipuncture using a winged infusion set?
A. Eliminates the need for a tourniquet
Anchoring the vein does not eliminate the need for a tourniquet. The tourniquet is applied to engorge the veins, making them more prominent and easier to puncture. Anchoring is a technique used after the tourniquet has already accomplished this task.
B. Reduces the pain of needle insertion
While anchoring the vein can provide a more stable area for needle insertion, which might indirectly reduce pain, its primary purpose is not pain reduction. Pain during needle insertion is more directly influenced by the needle gauge, angle of insertion, and the phlebotomist's technique.
C. Improves vein identification
Improving vein identification is not the direct purpose of anchoring. Vein identification is typically done visually and by palpation before the application of the tourniquet and before anchoring the vein. Anchoring is performed to stabilize the vein once it has been identified.
D. Minimizes vein movement
The primary purpose of anchoring the vein is to minimize its movement during venipuncture. This is important because it helps prevent the needle from slipping out of or through the vein, which can cause discomfort and bruising, and may require another puncture attempt.
Full Explanation
Choice A Reason:
Anchoring the vein does not eliminate the need for a tourniquet. The tourniquet is applied to engorge the veins, making them more prominent and easier to puncture. Anchoring is a technique used after the tourniquet has already accomplished this task.
Choice B Reason:
While anchoring the vein can provide a more stable area for needle insertion, which might indirectly reduce pain, its primary purpose is not pain reduction. Pain during needle insertion is more directly influenced by the needle gauge, angle of insertion, and the phlebotomist's technique.
Choice C Reason:
Improving vein identification is not the direct purpose of anchoring. Vein identification is typically done visually and by palpation before the application of the tourniquet and before anchoring the vein. Anchoring is performed to stabilize the vein once it has been identified.
Choice D Reason:
The primary purpose of anchoring the vein is to minimize its movement during venipuncture. This is important because it helps prevent the needle from slipping out of or through the vein, which can cause discomfort and bruising, and may require another puncture attempt.