Specimen Handling - Ccma

1. What instruction is essential for a $24$-hour urine collection end time?

   Include the final void exactly at the $24$-hour stop time. Including the final void captures all urine produced within the exact 24-hour timeframe for accurate total volume.

2. What is the correct action if urine for culture cannot be transported promptly?

   Refrigerate or use an approved preservative per laboratory protocol. Refrigeration or preservatives inhibit bacterial growth, maintaining specimen viability until laboratory processing.

3. Which option is the correct specimen for a throat culture or rapid strep test?

   Swab tonsillar pillars and posterior pharynx; avoid tongue and cheeks. Targeting these areas collects exudate from infected sites, avoiding non-relevant oral flora for specific pathogen identification.

4. What is the correct storage requirement during a $24$-hour urine collection?

   Keep the container refrigerated or on ice as directed by the laboratory. Cool storage prevents bacterial growth and chemical degradation, preserving analyte stability throughout collection.

5. What is the correct specimen for fecal occult blood testing (FOBT) using cards?

   Small stool smear applied to the test card windows as instructed. Applying a thin smear to card windows allows for even distribution and proper reaction with testing reagents.

6. Which option best describes the chain-of-custody requirement for legal specimens?

   Document each transfer with signatures, dates/times, and secure handling. Detailed documentation maintains evidentiary integrity, tracking handling to prevent tampering in legal contexts.

7. What is the correct instruction for collecting a sputum specimen for culture?

   Deep cough specimen in sterile container; avoid saliva. Deep cough produces lower respiratory secretions, providing a representative sample for pathogen detection without oral contamination.

8. Which two patient identifiers are required on every nonblood specimen label?

   Patient full name and a second unique identifier (for example, DOB or MRN). Standard protocol mandates two identifiers to prevent misidentification and ensure specimen traceability to the correct patient.

9. Which substance should be avoided when collecting stool for ova and parasites (O&P)?

   Urine or toilet water contamination. Contamination with urine or water can kill parasites or dilute the sample, leading to inaccurate detection of ova and parasites.

10. Identify the correct packaging requirement for transporting nonblood specimens.

    Leak-proof primary plus biohazard bag with separate requisition pocket. This packaging prevents leaks and cross-contamination while separating paperwork to avoid biohazard exposure.

11. What is the correct collection principle for a wound culture swab specimen?

    Collect from the viable wound bed after cleansing; avoid surface contaminants. Sampling the wound bed after cleansing targets causative organisms, avoiding superficial contaminants for accurate culture results.

12. What is the correct transport medium for most swab cultures sent to the laboratory?

    Appropriate transport medium (for example, Amies or Stuart) per test. These media preserve microbial viability during transport, ensuring reliable culture and sensitivity testing.

13. What is the required container characteristic for most urine and stool specimens?

    Clean, dry, leak-proof container with a secure screw-cap lid. These features prevent leakage, contamination, and evaporation, preserving specimen quality during transport and storage.

14. Identify the correct action if a specimen label is missing or has incorrect identifiers.

    Reject and recollect per policy; do not relabel an unlabeled specimen. Policy requires rejection to maintain accuracy and chain of custody, as relabeling risks errors and compromises integrity.

15. Which option is the correct specimen type for a $24$-hour urine test?

    All urine for $24$ hours in a large container, often with preservative. Collecting all urine over 24 hours allows measurement of total analyte excretion, with preservatives preventing degradation.

16. What instruction is essential for a $24$-hour urine collection start time?

    Discard the first void at start time, then collect all urine for $24$ hours. Discarding the first void establishes the precise start of the timed period, ensuring complete 24-hour collection.

17. Which instruction best describes a clean-catch midstream urine collection for females?

    Clean front to back, begin voiding, collect midstream without touching inside. Proper cleansing and midstream collection minimize perineal contamination, ensuring a reliable sample for testing.

18. What is the primary purpose of collecting nonblood specimens using aseptic technique?

    Prevent contamination and preserve specimen integrity for accurate results. Aseptic technique minimizes microbial introduction from external sources, ensuring the specimen accurately represents the patient's condition for reliable diagnostic testing.

19. What is the correct action if the outside of a specimen container is contaminated?

    Don gloves, disinfect container exterior, then place in biohazard bag. Disinfecting removes biohazards from the exterior, ensuring safe handling and compliance with infection control standards.

20. What is the correct container for stool culture or O&P specimens?

    Clean, leak-proof stool container; use preservative vial if required. A secure container prevents leakage and contamination, while preservatives maintain pathogen viability for testing.

21. Which instruction best describes a clean-catch midstream urine collection for males?

    Clean glans, begin voiding, collect midstream without touching inside. Cleansing the glans and midstream collection reduce urethral contamination, yielding a valid specimen for analysis.

22. What is the correct timing for labeling a nonblood specimen container?

    Immediately after collection and in the presence of the patient. Labeling at this time verifies patient identity and prevents errors from specimen mix-ups or delays in identification.

23. What is the correct urine specimen for a culture and sensitivity (C&S) test?

    Sterile clean-catch midstream urine, promptly transported to the lab. Sterile collection and prompt transport prevent bacterial overgrowth, ensuring accurate microbial identification in testing.

24. What additional label information is required for all nonblood specimens besides identifiers?

    Date/time of collection and collector initials (or ID) and specimen source. These details ensure traceability, document the collection process, and specify the specimen type for appropriate laboratory processing.

25. What is the correct urine collection method for a routine urinalysis (UA) specimen?

    Clean-catch midstream urine in a sterile container. This method reduces bacterial contamination from external genitalia, providing a representative sample for accurate analysis.

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