Specimen Processing - Ccma
- Which handling error most commonly causes hemolysis during specimen processing?
- Vigorous shaking or forcing blood through a needle. Excessive agitation damages red blood cells, releasing hemoglobin that skews results.
- Which information must be included on a blood specimen label besides patient identifiers?
- Date/time collected and collector initials (per facility policy). This data tracks collection details for quality control and traceability in case of discrepancies.
- Which PPE is minimally appropriate when handling and transporting blood specimens?
- Gloves; add gown/face protection if splash risk is present. Gloves provide barrier protection against bloodborne pathogens, with added PPE for higher risks.
- What is the correct timing for labeling a blood tube to prevent specimen mix-ups?
- Immediately after collection, in the patient presence. Labeling at the point of collection verifies the specimen directly with the patient, reducing identification errors.
- What is the correct immediate step if a blood specimen label is missing or illegible?
- Do not relabel; recollect per policy and notify the laboratory. Relabeling risks errors; recollection maintains identification integrity and lab protocols.
- What is the correct method to transport blood specimens through public areas of a facility?
- Use a closed, leak-proof, labeled biohazard transport container. Closed containers prevent exposure and comply with safety regulations in shared spaces.
- Which practice best maintains specimen integrity when transport is delayed?
- Follow test-specific time and temperature requirements immediately. Adhering to specific conditions prevents degradation, ensuring reliable analyte stability.
- Which specimen component is obtained from a centrifuged anticoagulated blood tube?
- Plasma. Anticoagulants keep blood liquid, yielding plasma supernatant after spinning.
- Identify the correct response if a blood specimen leaks during transport within the facility.
- Treat as biohazard spill; contain, disinfect, and follow exposure policy. Spills pose infection risks; proper cleanup follows OSHA guidelines to protect personnel.
- What is the correct transport position for a blood collection tube to reduce leakage risk?
- Upright (vertical) in a secure, leak-resistant carrier. Vertical positioning minimizes pressure on tube stoppers, preventing leaks during movement.
- Which transport condition is required for specimens that must be kept at room temperature?
- Do not refrigerate or place on ice; maintain room temperature. Room temperature prevents cold-induced changes, such as hemolysis in certain tests.
- What is the correct processing step for serum tests after blood is collected in a clot activator tube?
- Allow to clot, then centrifuge and separate serum as required. Clotting allows separation of liquid serum from cells for tests requiring absence of anticoagulants.
- Which identifier is required on every blood specimen label to ensure correct patient identification?
- Patient full name and a second unique identifier (e.g., DOB or MRN). Standard protocol mandates two identifiers to minimize errors in patient matching and ensure accurate test results.
- Which term describes a specimen compromised by breakdown of red blood cells during handling?
- Hemolyzed specimen. Hemolysis releases intracellular contents, interfering with test accuracy like potassium levels.
- What is the primary purpose of inverting additive blood tubes after collection?
- To mix blood with additive and prevent clotting or platelet clumping. Inversion ensures uniform distribution of anticoagulants, preserving specimen quality for accurate testing.
- Which specimen component is obtained from a centrifuged clotted blood tube?
- Serum. Clotting removes fibrinogen, leaving serum as the liquid portion post-centrifugation.
- Which action is required before transporting a blood specimen off-site or to another department?
- Place in a leak-proof biohazard bag with a separate requisition pouch. Biohazard bags contain potential leaks and separate paperwork to comply with infection control standards.
- Which transport condition is required for specimens labeled as light-sensitive?
- Protect from light (e.g., wrap in foil or use amber container). Light protection prevents photodegradation of sensitive analytes like bilirubin.
- Which situation requires a chain-of-custody process for a blood specimen?
- Forensic or legal testing (e.g., drug or alcohol testing). Legal tests require documented handling to prove no tampering occurred.
- Which transport condition is required for specimens that must remain chilled?
- Transport on ice or cold pack per test requirements. Cooling preserves labile components like ammonia that degrade at room temperature.
- What is the correct action if a specimen requisition does not match the tube label?
- Do not send; resolve discrepancy before processing or transport. Mismatches indicate errors; resolution ensures patient safety and accurate testing.
- What is the purpose of documenting each transfer in chain-of-custody handling?
- To maintain specimen integrity and legal defensibility. Documentation tracks handling to ensure no alterations, supporting evidence admissibility in court.
- Identify the correct handling for a blood tube after draw to avoid hemolysis.
- Gently invert; do not shake or vigorously mix. Gentle mixing preserves red blood cell integrity, preventing rupture that leads to inaccurate results.
- What is the correct processing step for plasma tests after collection in an anticoagulant tube?
- Centrifuge promptly and separate plasma as required. Centrifugation separates plasma from cells while anticoagulation prevents clotting.
- Which handling step prevents cross-contamination when processing multiple blood specimens?
- Change gloves and disinfect work surfaces between contaminated tasks. Fresh gloves and clean surfaces eliminate pathogen transfer between samples.