Nclexpn Quiz: Specimen Collection

What this quiz covers

This quiz focuses on Specimen Collection, giving you a quick way to practice the rules, question types, and explanations that matter most for Nclexpn.

How to use this quiz

Try each quiz question before looking at the correct answer. Use the explanations to review missed ideas, then come back to similar questions until the pattern feels familiar.

Question 1

1. I will clean the area with the provided wipes, moving from back to front.
2. I should start urinating directly into the cup as soon as I begin.
3. I need to hold my labia apart while I urinate into the cup. (correct answer)
4. I will fill the container to the very top with urine.

Explanation: The correct procedure for a female client collecting a clean-catch midstream urine specimen is to separate the labia to prevent contamination from the surrounding skin and then urinating. Wiping from back to front can introduce bacteria into the meatus. The client should urinate a small amount into the toilet first (midstream) to clear the urethra. The container only needs to be filled to the level indicated, not to the top.

Question 2

1. I should avoid eating red meat for three days before I start the test.
2. It's important that I stop taking my high-dose vitamin C supplements.
3. I will make sure to eat plenty of broccoli and turnips. (correct answer)
4. I will collect a sample from a different bowel movement for each test card.

Explanation: Certain foods can interfere with guaiac test results. While red meat can cause a false positive, certain raw vegetables high in peroxidase, such as turnips, broccoli, and radishes, can also cause a false-positive result and should be avoided. Avoiding red meat and vitamin C (which can cause a false negative) are correct instructions.

Question 3

1. I will clean the area with the provided wipes, moving from back to front.
2. I should start urinating directly into the cup as soon as I begin.
3. I need to hold my labia apart while I urinate into the cup. (correct answer)
4. I will fill the container to the very top with urine.

Explanation: The correct procedure for a female client collecting a clean-catch midstream urine specimen is to separate the labia to prevent contamination from the surrounding skin and then urinating. Wiping from back to front can introduce bacteria into the meatus. The client should urinate a small amount into the toilet first (midstream) to clear the urethra. The container only needs to be filled to the level indicated, not to the top.

Question 4

1. I should avoid eating red meat for three days before I start the test.
2. It's important that I stop taking my high-dose vitamin C supplements.
3. I will make sure to eat plenty of broccoli and turnips. (correct answer)
4. I will collect a sample from a different bowel movement for each test card.

Explanation: Certain foods can interfere with guaiac test results. While red meat can cause a false positive, certain raw vegetables high in peroxidase, such as turnips, broccoli, and radishes, can also cause a false-positive result and should be avoided. Avoiding red meat and vitamin C (which can cause a false negative) are correct instructions.

Question 5

1. Confirm the client's identity using two identifiers before obtaining the fingerstick specimen (correct answer)
2. Apply a bandage tightly over the puncture site to stop bleeding quickly
3. Puncture the same finger used last time to maintain consistency between readings
4. Instruct the client to cough deeply after rinsing the mouth to obtain a sputum specimen

Explanation: This question tests specimen collection and reduction of risk potential. Proper technique in specimen collection is crucial to prevent contamination and ensure accurate diagnostic results. The correct answer, confirming the client's identity using two identifiers before obtaining the fingerstick specimen, represents the best practice because it ensures patient safety and accurate result attribution. Option B risks circulatory compromise; option C increases infection or callus risk; option D is unrelated to blood collection and pertains to sputum specimens. The principle behind accurate specimen collection is to obtain a sample that truly represents the client's condition without external contaminants. Safe collection involves using sterile equipment and proper hygiene to reduce infection risk. A transferable strategy is to always verify identity as the first step in any procedure to maintain specimen integrity.

Question 6

1. Proceed with the fingerstick and document that the client ate breakfast
2. Clarify the timing of the test and notify the nurse in charge or provider per facility policy before obtaining the specimen (correct answer)
3. Ask the client to drink water and walk for 15 minutes before the fingerstick
4. Instruct the client to provide a midstream clean-catch urine sample

Explanation: This question tests specimen collection and reduction of risk potential. Proper technique in specimen collection is crucial to prevent contamination and ensure accurate diagnostic results. The correct answer, clarifying the timing of the test and notifying the nurse in charge or provider per facility policy before obtaining the specimen, represents the best practice because it addresses the non-fasting state that could skew results. Option A ignores the fasting requirement; option C does not correct the issue; option D is unrelated to blood collection and pertains to urine specimens. The principle behind accurate specimen collection is to obtain a sample that truly represents the client's condition without external contaminants. Safe collection involves using sterile equipment and proper hygiene to reduce infection risk. A transferable strategy is to always verify test conditions like fasting and escalate deviations to maintain specimen integrity.

Question 7

1. Collect the client's first voided specimen at 8:00 AM and place it in the container.
2. Instruct the client to void at 8:00 AM, discard the specimen, and then begin the collection. (correct answer)
3. Keep the collection container at room temperature at the client's bedside.
4. Tell the client to limit fluid intake during the 24-hour collection period.

Explanation: To start a 24-hour urine collection, the client should empty their bladder, and that first specimen is discarded. This ensures the collection begins with an empty bladder. The time is noted, and all subsequent urine for the next 24 hours is collected. The container must be kept on ice or refrigerated, and the client should be encouraged to maintain normal fluid intake unless otherwise specified.

Question 8

1. Obtain a sample from two different areas of the stool specimen. (correct answer)
2. Instruct the client to urinate into the collection container with the stool.
3. Use a large amount of stool to completely cover the test card window.
4. Ensure the specimen is refrigerated immediately after collection.

Explanation: When collecting a stool specimen for a guaiac test, a small sample should be taken from two different parts of the stool because occult blood may not be distributed evenly throughout the specimen. The specimen should be free of urine. Only a thin smear of stool is needed on the test card. Refrigeration is not required for this specific test card method.

Question 9

1. Immediately after the client finishes breakfast.
2. In the early morning, shortly after the client awakens. (correct answer)
3. In the evening, just before the client goes to sleep.
4. After the client has used an antiseptic mouthwash.

Explanation: Sputum specimens are best collected in the early morning because secretions pool in the airways overnight, making it easier to obtain a sample rich in microorganisms. The client should rinse their mouth with water, not antiseptic mouthwash, to reduce contamination from mouth flora. Collecting after a meal can increase the risk of emesis and contamination with food particles.

Question 10

1. Gently swab the most purulent drainage in the wound bed.
2. Cleanse the wound with sterile normal saline. (correct answer)
3. Swab the skin around the wound edges.
4. Remove the old dressing and immediately swab the visible drainage.

Explanation: Before collecting a wound culture, the wound should be cleansed or irrigated with a non-antiseptic solution like sterile normal saline. This removes surface contaminants and old drainage, ensuring the specimen collected reflects the microorganisms actually causing infection within the wound tissue. Swabbing pus, old drainage, or periwound skin can result in an inaccurate culture.

Question 11

1. Disconnect the catheter from the drainage tubing and collect urine.
2. Empty urine from the drainage bag into a sterile container.
3. Cleanse the specimen port on the tubing and aspirate urine with a sterile syringe. (correct answer)
4. Ask the client to void into a sterile collection cup.

Explanation: To obtain a sterile specimen from an indwelling catheter, the PN must use aseptic technique. This involves cleansing the designated specimen port with an antiseptic wipe and using a sterile syringe to aspirate urine. Disconnecting the system or collecting from the bag introduces a high risk of contamination. The client cannot void normally while the catheter is in place.

Question 12

1. Puncturing the center of the client's fingertip.
2. Wiping away the first drop of blood with sterile gauze. (correct answer)
3. Vigorously milking the client's finger to obtain a larger sample.
4. Using the client's index finger because it is the most accessible.

Explanation: The first drop of blood from a capillary puncture contains interstitial fluid and tissue debris, which can alter the blood glucose reading. Therefore, it should be wiped away. The puncture should be on the side of the fingertip, not the center, as it is less painful and has better blood flow. The finger should be gently squeezed, not milked, as milking can also introduce interstitial fluid. The middle or ring finger is preferred over the index finger, which tends to have thicker calluses.

Question 13

1. At the nurses' station before entering the client's room.
2. At the client's bedside immediately after collecting the specimen. (correct answer)
3. After confirming the results with the primary health care provider.
4. Before handing the specimen to the unlicensed assistive personnel (UAP) for transport.

Explanation: Labeling the specimen at the client's bedside immediately after collection is a critical safety step. It confirms the specimen belongs to the correct client (using two identifiers) and minimizes the risk of mislabeling or mix-ups. Labeling before collection is risky because the plan might change or the wrong label could be used. Labeling at the nurses' station increases the risk of error.

Question 14

1. Ask the client to state their full name and date of birth. (correct answer)
2. Confirm the order in the client's electronic health record.
3. Check the client's room and bed number against the lab requisition.
4. Ensure that the client has been NPO for at least 8 hours.

Explanation: The absolute priority before any procedure, especially one like a type and crossmatch where an error can be fatal, is positive client identification using at least two identifiers (e.g., name and date of birth). The nurse must compare this information with the client's wristband and the lab requisition. While confirming the order is important, it is not the priority action immediately before collection at the bedside. Room numbers are not reliable identifiers. NPO status is not required for a type and crossmatch.

Question 15

1. The roof of the mouth and the insides of the cheeks.
2. The top surface of the tongue and under the tongue.
3. The posterior pharynx and the tonsillar pillars. (correct answer)
4. The uvula and the soft palate only.

Explanation: To obtain an accurate sample for a rapid strep test or throat culture, the swab must touch the areas where the Streptococcus bacteria are most likely to be present. This includes the posterior pharynx and the tonsillar area on both sides. Care should be taken to avoid touching the tongue, cheeks, or uvula, as this can contaminate the specimen with oral flora.

Question 16

1. The tip of the right index finger.
2. The side of the left middle finger. (correct answer)
3. The client's earlobe.
4. The heel of the client's foot.

Explanation: The preferred site for a capillary puncture in an adult is the side of a non-dominant finger, such as the middle or ring finger. Using the non-dominant hand (left, in this case) causes less inconvenience for the client. The sides of the finger are less calloused and have fewer nerve endings than the tip. The heel is used for infants, and the earlobe is a less common alternative site.

Question 17

1. Explain to the client that the test is mandatory for their care.
2. Ask the unlicensed assistive personnel (UAP) to try to collect the specimen later.
3. Document the client's refusal in the medical record and notify the RN. (correct answer)
4. Consult with the client's family to persuade the client to agree.

Explanation: Competent clients have the right to refuse treatment and procedures, including specimen collection. The PN's role is to respect the client's autonomy, document the refusal accurately, and report the information to the RN. The RN can then assess the situation further and communicate with the primary health care provider. Trying to coerce the client or involving family against the client's wishes is inappropriate.

Question 18

1. Cap the container, label it, and send it to the laboratory.
2. Ask the client to try again, reinforcing the need to cough deeply from the lungs. (correct answer)
3. Document that the client's sputum is clear and non-purulent.
4. Mix the specimen with a small amount of saline to add volume.

Explanation: A thin, watery, and clear specimen is most likely saliva, not sputum from the lower respiratory tract. Sending saliva to the lab for a sputum culture will yield inaccurate results. The PN should recognize the inadequate specimen, provide further instruction to the client on how to produce a deep cough to bring up sputum, and request a new sample. Documenting it as sputum or altering the specimen is incorrect.

Question 19

1. Continue the collection and note the missed specimen on the lab slip.
2. Extend the collection time by four hours to compensate for the loss.
3. Document the incident in the client's chart and take no other action.
4. Notify the registered nurse (RN) that the collection must be restarted. (correct answer)

Explanation: A 24-hour urine collection requires all urine produced within the 24-hour period to be collected for accurate results. If any specimen is missed, the entire collection is invalid and must be restarted. The PN should immediately notify the RN, who will coordinate with the laboratory and primary health care provider. The PN's scope includes recognizing when collections are compromised and reporting to the RN for appropriate action.

Question 20

1. The roof of the mouth and the insides of the cheeks.
2. The top surface of the tongue and under the tongue.
3. The posterior pharynx and the tonsillar pillars. (correct answer)
4. The uvula and the soft palate only.

Explanation: To obtain an accurate sample for a rapid strep test or throat culture, the swab must touch the areas where the Streptococcus bacteria are most likely to be present. This includes the posterior pharynx and the tonsillar area on both sides. Care should be taken to avoid touching the tongue, cheeks, or uvula, as this can contaminate the specimen with oral flora.