NHA Certified Phlebotomy Technician (CPT) flashcards

Blood culture specimens are collected to detect microorganisms in the bloodstream and must be transported to the microbiology laboratory promptly at room temperature.

• Room temperature transport (typically 20-25°C).
• Prompt delivery to microbiology.
• Do not refrigerate or centrifuge.

Memory trick: Room Temperature Rules for Rapid Results.

Coagulation specimens (PT/aPTT) require prompt centrifugation to separate plasma from cells. The plasma can then be transported at room temperature for specific timeframes or frozen for longer storage.

• Separate plasma from cells quickly.
• Plasma can be transported at room temperature (e.g., within 24h for PT).
• Freezing is for longer storage or specific tests.

Memory trick: Coagulation Plasma: Centrifuge, then Carry Calmly.

Confirming whether a patient has abstained from food and drink (except water) for a specified period before certain lab tests.

• Essential for accurate glucose and lipid tests.
• Prevents erroneous results.
• Directly impacts patient diagnosis and treatment.

Memory trick: No food, no fuss, for accurate test results, trust us!

Cerebrospinal fluid (CSF) specimens require immediate transport to the laboratory for processing to ensure accurate cell counts, microbiology, and chemistry results.

• Time-sensitive for cell counts (cells lyse quickly).
• Crucial for microbiology (fastidious organisms).
• Deliver immediately; avoid delays.

Memory trick: CSF: Cells Survive Faster.

Informing the patient about each stage of the venipuncture procedure.

• Reduces anxiety and builds trust.
• Includes explaining equipment use (e.g., tourniquet).
• Fosters patient cooperation.

Memory trick: ID, Assess, Select, Communicate, Educate!

Edema is swelling caused by excess fluid accumulation in body tissues. Venipuncture should be avoided in edematous areas.

• Compromises sample integrity due to dilution.
• Increases risk of infection.
• Makes vein palpation difficult.

Memory trick: When the arm is a puff, don't draw, ask for help, that's enough!

Light-sensitive specimens, like bilirubin, must be protected from light exposure during collection, transport, and storage to prevent degradation of analytes and ensure accurate test results.

• Use amber tubes or wrap in foil.
• Minimize exposure time.
• Common analytes include bilirubin, vitamin B12, folate.

Memory trick: Light is a Foe, Foil is a Shield.

Incomplete clotting in serum specimens occurs when the blood is centrifuged before sufficient time has passed for a solid clot to form. This results in fibrin strands remaining in the serum, which can interfere with laboratory testing and instrumentation.

• Common cause: centrifuging too soon.
• Requires 20-60 minutes clotting time for serum tubes.
• Results in fibrin strands, re-clotting.
• Causes specimen rejection and need for recollection.

Memory trick: Let the blood clot, don't spin it hot, or the serum will be a knot.

A patient's right to decline a medical procedure or treatment. Healthcare providers must respect this right and seek to understand the patient's reasons.

• Patient autonomy must be respected.
• Never force a procedure.
• Attempt to address concerns or notify nursing staff.

Memory trick: Refusal's a stop sign, not a suggestion; listen, understand, then address the question!

Avoidance of venipuncture on the same side as a mastectomy.

• Risk of lymphedema.
• Increased risk of infection.
• Always use the contralateral (opposite) arm if possible.

Memory trick: Mastectomy side? No draw, just hide!

Stool specimens for ova and parasites (O&P) must be free from contamination with urine or toilet water to ensure accurate detection of parasites.

• Urine/water can destroy parasites.
• Use a clean, dry collection container.
• Crucial for accurate diagnosis.

Memory trick: Stool O&P: No Water, No Worries.

Aliquot safety involves measures to protect the phlebotomy technician and prevent contamination when transferring a portion of a specimen from one container to another. Key is avoiding direct contact and aerosol generation.

• Wear PPE (gloves, lab coat, face shield).
• Use mechanical pipetting devices.
• Work over an absorbent pad.
• Avoid splashing and aerosol generation.

Memory trick: When you aliquot, don't mouth-pipette, or a biohazard you'll regret.

Absorbent material is a mandatory component of specimen packaging for transport, designed to soak up any leaks from the primary container and prevent biohazard contamination.

• Required by IATA and DOT regulations.
• Placed between primary and secondary containers.
• Prevents spread of infectious material.

Memory trick: Spills are a no-no, absorbent material says 'whoa!'

Employing communication and environmental strategies to reduce patient fear and stress during medical procedures.

• Acknowledge feelings first.
• Use calm, reassuring tone.
• Offer simple explanations and distractions.

Memory trick: Acknowledge, Reassure, then Proceed with care!

If a patient experiences sharp, radiating pain during venipuncture, it indicates possible nerve involvement. The immediate and critical action is to withdraw the needle to prevent permanent nerve damage.

• Sharp, radiating pain suggests nerve involvement.
• Immediate needle withdrawal is required.
• Document the incident thoroughly.
• Report to a supervisor or physician.

Memory trick: Sharp nerve pain? Get that needle out, fast!

Drawing blood from skin covered by tattoos.

• Generally avoided due to obscured veins, infection risk, and skin reactions.
• Alternative sites (e.g., dorsal hand) are preferred.
• If unavoidable, select an area of healthy, intact skin.

Memory trick: Tattoos are art, but for draws, pick a clean part!

Strategies used to alleviate patient anxiety during medical procedures.

• Clear, step-by-step explanations.
• Opportunity for questions.
• Empathetic listening and reassurance.

Memory trick: Explain, engage, ease the anxious stage!

Routine urinalysis specimens must be processed promptly or refrigerated within 1 hour of collection to prevent bacterial overgrowth, cellular degradation, and changes in chemical composition.

• Test within 1 hour at room temp.
• Refrigerate up to 24 hours.
• Prolonged room temp leads to false results.

Memory trick: One hour in the warm, or fridge it to disarm, degradation's harm!

Specific factors to prioritize when performing blood draws on infants.

• Pain management is paramount.
• Site selection depends on age (heel vs. vein).
• Smallest possible blood volume to prevent anemia.

Memory trick: Tiny patients, tiny pain; make it quick, again and again!

EDTA tubes must be gently inverted 8-10 times immediately after collection to ensure proper mixing of the anticoagulant with the blood, preventing clot formation.

• Crucial for preventing microclots.
• Ensures accurate hematology results.
• Gently invert, do not shake.

Memory trick: EDTA: Every Drop Thoroughly Agitated.

When conventional venipuncture sites are unavailable due to conditions like amputation or active IVs in both arms, alternative sites such as foot veins may be used in adults, but only with explicit physician approval due to increased risk.

• Avoid prosthetic limbs.
• Avoid limbs with active IVs.
• Foot veins are a last resort in adults.
• Physician approval is mandatory for foot venipuncture.

Memory trick: No arms, no IV site, then foot with doctor's light.

When collecting a blood alcohol level (BAL) specimen, it is critical to use a non-alcohol-based antiseptic for skin preparation to prevent contamination of the sample, which could lead to inaccurate, falsely elevated results.

• Isopropyl alcohol is strictly contraindicated.
• Use povidone-iodine, chlorhexidine, or benzalkonium chloride.
• Contamination can lead to legal implications.
• Ensure site is completely dry before venipuncture.

Memory trick: No alcohol prep for blood alcohol test, or the results will be a mess.

Properly balancing a centrifuge by distributing tubes of equal weight evenly across the rotor is essential for safe operation, preventing equipment damage, and ensuring effective specimen separation.

• Place equal weight/volume tubes opposite.
• Prevents vibration and potential accidents.
• Ensures even separation of components.

Memory trick: Balance is key, for a smooth spin, and safety to win!

Serum specimens must be allowed to clot completely before centrifugation to ensure proper separation of serum from blood cells and fibrin.

• Typically 30 minutes at room temperature.
• Insufficient clotting leads to fibrin strands.
• Clot activators shorten time, but still need full activation.

Memory trick: Let it clot, then spin; don't rush the separation within!

The maximum time allowed between blood collection and centrifugation for coagulation specimens (light blue top tubes) to ensure accurate test results.

• Routine PT/aPTT tests require centrifugation within 2 hours.
• Delays can impact coagulation factor stability.
• Proper handling is critical for reliable coagulation test outcomes.

Memory trick: Blue tubes need a quick spin, within two hours, or the results thin.

The presence of fibrin strands in serum after centrifugation indicates incomplete clotting of the blood specimen, typically due to insufficient clotting time or improper mixing of clot activators.

• Prevents accurate testing.
• Requires re-centrifugation or recollection.
• Causes include short clotting time, inadequate inversion.

Memory trick: Fibrin Strands: Clotting Cut Short, Results Distorted.

For patients prone to fainting (syncope) during venipuncture, the safest position is lying down (supine) or in a fully reclined chair.

• Prevents fall-related injuries.
• Maintains cerebral blood flow.
• Reduces anxiety by providing a sense of safety.

Memory trick: Fainting fear? Lay them flat, no more tears!

When a specimen is rejected, thorough documentation is essential. This includes the reason for rejection, actions taken, and communication with relevant parties to ensure patient safety and quality care.

• Reason for rejection is primary.
• Date and time of rejection.
• Who was notified.

Memory trick: Reject with reason, document the season, for quality's pleasing!

Allergies to materials used during venipuncture that can cause adverse reactions.

• Common allergens: latex, adhesives, antiseptics.
• Must be identified before procedure.
• Requires alternative materials if allergies are present.

Memory trick: Gloves, stick, and clean - check for allergies, keep it keen!

Techniques used to alleviate patient discomfort and anxiety during venipuncture.

• Offer topical anesthetics if appropriate and available.
• Use distraction techniques.
• Provide clear explanations and empathetic communication.

Memory trick: When fears arise, offer comfort and wise advice.

The 'triple packaging' system for biological substances (Category B) consists of a primary receptacle, a secondary watertight packaging, and a rigid outer packaging, designed to prevent leakage and protect specimens during transport.

• Mandated by IATA/DOT.
• Ensures containment and safety.
• Primary, secondary, and outer layers.

Memory trick: Triple Package: Protect, Contain, Ship Right.

Veins that are hardened or clotted, often due to repeated venipuncture, inflammation, or disease.

• Feel hard, cord-like, and lack resilience.
• Unsuitable for venipuncture.
• Can lead to unsuccessful draws, pain, and complications.

Memory trick: Hard and cordy? That vein's no good, buddy!

Blood specimens for glucose testing, especially GTT, require prompt separation of plasma/serum from cells or collection in tubes with glycolysis inhibitors to prevent glucose consumption by red blood cells.

• Glucose decreases in whole blood over time.
• Separate plasma/serum within 30-60 minutes.
• Sodium fluoride tubes inhibit glycolysis.

Memory trick: Glucose Gone Quickly: Separate or Stop.

Venipuncture performed on the dorsal side of the hand, often as an alternative site, requiring extra care due to smaller, more fragile, and more mobile veins.

• Veins tend to roll easily.
• Requires firm anchoring.
• Smaller gauge needles (e.g., butterfly) are often preferred.

Memory trick: Hand veins are tricky, so anchor them quick-y!

Certain analytes in blood specimens are sensitive to light and can degrade, leading to inaccurate test results. These specimens must be protected from light exposure during collection, transport, and storage.

• Analytes like bilirubin, folate, and porphyrins are light-sensitive.
• Light exposure can cause degradation and false low results.
• Use amber tubes, foil, or dark bags for protection.

Memory trick: Light is bright, so keep it out of sight.

For outpatients, proper identification involves asking the patient to state their full name and date of birth, then comparing this verbal information to the requisition form to ensure an exact match before proceeding.

• Two identifiers are required.
• Verbal confirmation from patient is primary.
• Requisition form is the source of truth.
• Discrepancies require resolution before drawing.

Memory trick: Say it, then match it, before you stick it.

Small red or purple spots on the skin caused by minor hemorrhage. Indicates potential bleeding risk.

• Sign of capillary fragility or platelet dysfunction.
• Requires caution for venipuncture.
• Consult medical staff before proceeding to assess bleeding risk.

Memory trick: Spots on the skin? Get a doctor to chime in!

Plasma for routine coagulation tests (e.g., PT, PTT, INR) must be separated from cellular components within a specific timeframe to preserve the integrity of labile coagulation factors.

• Centrifuge within 2 hours of collection.
• Prevents degradation of factors.
• Crucial for accurate PT/INR results.

Memory trick: Two hours is the limit, or the factors will diminish!

When drawing blood from a patient with a history of seizures, the primary safety measure is to ensure the patient is in a supine or reclined position to prevent injury in case of a sudden seizure.

• Patient safety is paramount.
• Supine/reclined position prevents falls during a seizure.
• Maintain a calm environment.
• Be prepared to protect the patient from injury.

Memory trick: Seizure risk? Lay them low, keep them safe.

STAT specimens require immediate transport to the laboratory for urgent processing and analysis to provide rapid results for critical patient care decisions.

• Prioritize STAT over routine specimens.
• Minimize transport time.
• Follow facility-specific STAT protocols.

Memory trick: Speedy Transport Always Timely for STAT.

Lactic acid specimens require collection in a gray-top (fluoride/oxalate) tube and immediate chilling on ice to prevent glycolysis and ensure accurate measurement of true lactic acid levels.

• Use gray-top tube (sodium fluoride).
• Place immediately on ice slurry.
• Transport quickly to lab.

Memory trick: Lactic Acid: Gray ice stops the sugar's race.

Accurate and complete labeling of specimens is paramount to patient safety and reliable test results. Critical identifiers ensure the right test is performed on the right patient at the right time.

• Patient's full name, DOB, unique ID.
• Date and time of collection.
• Collector's initials.

Memory trick: Name, DOB, Time-Date, and Initial's fate, prevent an erroneous state!

For long-term preservation of sensitive analytes (e.g., hormones) in plasma or serum, specimens must be stored frozen at -20°C or colder to prevent degradation and maintain integrity for extended periods.

• Required for months/years of storage.
• Halts metabolic and chemical degradation.
• Thaw properly to avoid damage.

Memory trick: Long Term: Freeze it Deep, Secrets to Keep.

Most routine chemistry and immunology specimens, if not immediately tested, should be stored refrigerated (2-8°C) to slow down degradation and maintain analyte stability for short periods.

• 2-8°C is standard for short-term.
• Prevents bacterial growth.
• Minimizes analyte breakdown.

Memory trick: Routine Storage: Fridge is Your Best Friend.

24-hour urine specimens require refrigeration or storage on ice throughout the collection period to preserve analytes and prevent microbial contamination.

• Refrigerate or keep on ice.
• Prevents bacterial growth.
• Maintains analyte stability.

Memory trick: 24 hours of urine needs a 'cool' attitude.

Complete blood count (CBC) specimens collected in EDTA tubes are stable for a limited time. Refrigeration is the preferred method for storage if testing is delayed, as it slows down cellular degradation without causing damage.

• Collected in lavender-top (EDTA) tube.
• Stable for up to 24 hours when refrigerated.
• Room temperature storage for >2-4 hours can alter results.
• Freezing is contraindicated due to cell lysis.

Memory trick: CBC cells like it cool, not frozen, not warm, that's the golden rule.

Frozen biological specimens for shipping must use a triple packaging system (primary, secondary, outer) and be kept frozen with dry ice to comply with regulations and maintain integrity.

• Triple packaging is mandatory.
• Dry ice maintains frozen state.
• Complies with IATA/DOT regulations.

Memory trick: Frozen Samples: Triple Pack, Dry Ice Track.

Before performing a heel stick on a newborn, applying a warm compress to the heel for 3-5 minutes is crucial to increase blood flow, making capillary collection easier and reducing the risk of hemolysis and repeat punctures.

• Warming dilates capillaries.
• Increased blood flow aids collection.
• Reduces trauma and risk of hemolysis.
• Standard practice for newborn heel sticks.

Memory trick: Warm the heel, make the blood flow swell.

Specimens for cold agglutinin tests must be kept warm (37°C) during and after collection to prevent the antibodies from reacting with red blood cells at colder temperatures, which would lead to false results.

• Collect in a pre-warmed tube.
• Transport at 37°C.
• Do not refrigerate.

Memory trick: Cold Agglutinin: Keep it Warm, not Chilly.

Measurement of medication concentrations in the blood to optimize drug dosing, assess compliance, and avoid toxicity, requiring precise timing of blood collection.

• Timing relative to last dose is critical.
• Often involves 'trough' (lowest) or 'peak' (highest) levels.
• Used for drugs with narrow therapeutic windows.

Memory trick: Time the dose, time the draw, accurate results for all!

A process in which the healthcare provider intentionally uses verbal and non-verbal communication skills to achieve specific patient-centered goals.

• Promotes trust and rapport.
• Reduces anxiety.
• Ensures patient understanding.

Memory trick: Explain, Empathize, Engage: Your patient's trust you'll gain!

When primary venipuncture sites (antecubital fossa) are unsuitable, alternative sites like the dorsal hand veins must be considered, following specific guidelines to ensure patient safety and specimen integrity.

• Avoid scarred, burned, or compromised areas.
• Dorsal hand veins are a common alternative.
• Foot veins may be used with physician approval, especially for adults.

Memory trick: Select the best site, avoid the bad, for a good blood draw.

Urine specimens for culture and sensitivity must be transported to the lab within 1 hour or refrigerated at 2-8°C to prevent overgrowth of bacteria.

• Time-sensitive for accurate bacterial count.
• Refrigeration inhibits growth.
• Delays lead to false results.

Memory trick: Urine Culture: Rapid or Refrigerate.

Ammonia specimens require immediate chilling and prompt plasma separation to inhibit cellular metabolism, which can rapidly increase ammonia levels in vitro, leading to falsely elevated results.

• Collected in EDTA or heparin (green top) tubes.
• Place on ice immediately after collection.
• Centrifuge and separate plasma within 15-30 minutes.
• Keep plasma cold/frozen until testing.

Memory trick: Ammonia's hot, so keep it cold, or the true value won't be told.

Coagulation specimens (light-blue top) have specific stability requirements. Unspun whole blood should be processed (plasma separated) within a critical timeframe (e.g., 1-2 hours for PT/INR) at room temperature to prevent degradation of labile coagulation factors and ensure accurate results.

• Sodium citrate tube.
• Plasma separation critical for stability.
• Unspun whole blood stability is limited.

Memory trick: Coagulation: Time's the Foe, Factors Flee Slow.

When a patient is cold or shivers, veins can constrict, making venipuncture difficult. Applying warmth to the site can induce vasodilation, improving vein visibility and palpability for a successful draw.

• Cold temperatures cause vasoconstriction.
• Warm compresses promote vasodilation.
• Dilated veins are easier to palpate and puncture.
• Ensure patient comfort before and during the draw.

Memory trick: Cold veins need warmth to grow and flow.

For patients unable to verbally identify themselves, the identification wristband is the primary source of identification and must be verified against the requisition.

• Wristband is critical for non-verbal patients.
• Must match requisition form.
• Never assume identity based on location.

Memory trick: No words, no worries, the wristband carries all the glories!

For outpatients, positive identification typically requires verbal confirmation of name and date of birth, supplemented by a photo ID if verbal confirmation is incomplete or unavailable.

• At least two identifiers required.
• Verbal + Photo ID is standard for outpatients.
• Never proceed with incomplete identification.

Memory trick: Two identifiers, clearly stated, or photo ID, validated!

The process of accurately matching a patient to their medical records and ensuring the correct procedure is performed on the correct individual.

• Requires at least two identifiers.
• Verbal confirmation is one identifier.
• ID band or photo ID is a common second identifier.

Memory trick: Two IDs for a safe draw, or no go at all!

Maintaining a consistently frozen state is paramount for frozen specimens during transport and storage. Any thawing and subsequent refreezing can severely degrade analytes, leading to inaccurate test results.

• Avoids degradation of labile analytes.
• Prevents protein denaturation and precipitation.
• Use dry ice or specialized frozen transport containers.
• One thaw cycle is generally acceptable; refreezing is not.

Memory trick: Once frozen, stay frozen; thaw and refreeze, and the results will be broken.