Free Phlebotomy Practice Test

Before drawing blood from an alert inpatient, a phlebotomist must confirm the patient's identity using at least two identifiers. Which pair of identifiers is acceptable?

• The patient's stated full name and date of birth (correct answer)
• The patient's room number and bed number
• The patient's diagnosis and attending physician
• The patient's stated name and current room number

The standard requires two patient-specific identifiers such as full name and date of birth, verified by having the patient state them and matching them to the requisition and, for inpatients, the ID wristband. Room and bed numbers are location-based and change when patients are moved, so they are never used as identifiers. Diagnosis and physician are not unique to the patient and are not reliable identifiers.

A phlebotomist receives a labeled requisition, but the inpatient's wristband name is spelled slightly differently than the requisition. What is the correct action?

• Do not draw; report the discrepancy to nursing for resolution (correct answer)
• Draw the specimen because the birth dates match
• Correct the wristband to match the requisition and proceed
• Draw the specimen and note the discrepancy on the label

Any discrepancy between the requisition and the patient's identification must be resolved before collection, so the phlebotomist should stop and notify the nurse or appropriate staff to correct it. Drawing anyway risks reporting results under the wrong identity. A phlebotomist must never alter a patient's wristband, and documenting the mismatch on the label does not resolve the underlying identity conflict.

A test order requires a 10-hour fasting specimen. During identification the patient says he ate breakfast two hours ago. What should the phlebotomist do?

• Refuse to draw the patient
• Collect and note the non-fasting status (correct answer)
• Cancel the order in the computer
• Delay the patient's other pending tests

When a patient has not fasted as required, the phlebotomist should follow facility policy, which typically means collecting the specimen and clearly noting the non-fasting status so the provider can interpret results correctly, or notifying the nurse or provider before proceeding. Refusing outright or canceling the order is outside the phlebotomist's authority. Delaying unrelated tests is unnecessary and could harm patient care.

Which vein is the first-choice site for routine venipuncture in the antecubital fossa because it is large, well-anchored, and located away from the brachial artery?

• Cephalic vein
• Basilic vein
• Radial vein
• Median cubital vein (correct answer)

The median cubital vein is the preferred site because it is typically large, close to the surface, well-anchored, and does not sit directly over the brachial artery or major nerves. The cephalic vein is a second choice and can be harder to anchor. The basilic vein is chosen last because the brachial artery and median nerve lie near it, raising the risk of injury. The radial vein is not an antecubital venipuncture site.

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The basilic vein is the least preferred antecubital site for venipuncture primarily because:

• It lies close to the brachial artery and median nerve (correct answer)
• It collapses more easily than other veins
• It contains valves that block blood flow
• It is always smaller than the cephalic vein

The basilic vein sits on the medial (inner) aspect of the antecubital area near the brachial artery and median nerve, so accidental puncture can cause arterial bleeding or nerve injury; it is therefore used only when other veins are unavailable. It is not selected against because it collapses or because of valves specifically, and size varies among patients rather than being uniformly smaller.

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What is the recommended angle of needle insertion for a routine venipuncture using an evacuated tube system?

• 45 to 60 degrees
• 75 degrees
• 90 degrees
• 30 degrees or less (correct answer)

A routine venipuncture is performed at an angle of 30 degrees or less to follow the path of the vein and reduce the chance of pushing through the back wall. An angle of 15 degrees or less is used for winged (butterfly) collection on shallow veins but is not the general standard. Angles of 45 degrees or more increase the risk of passing through the vein, and 90 degrees is used for dermal (heel/finger) punctures, not venipuncture.

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According to the current CLSI order of draw, which tube is collected first when both a blood culture and other tubes are ordered?

• Light-blue (sodium citrate) tube
• Red (serum, no additive) tube
• Lavender (EDTA) tube
• Sterile blood culture bottle or tube (correct answer)

Sterile blood culture collections are always drawn first to minimize the risk of contamination that would cause false-positive cultures. The light-blue coagulation tube is next, followed by serum tubes, then heparin, then EDTA, then glycolytic inhibitor tubes. Drawing cultures after other tubes would expose them to potential contaminants from tube tops and additives.

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Following blood cultures, which tube is drawn next in the CLSI order of draw?

• Green (heparin) tube
• Lavender (EDTA) tube
• Gray (sodium fluoride) tube
• Light-blue (sodium citrate) tube (correct answer)

The light-blue sodium citrate coagulation tube is drawn immediately after blood cultures so that additive carryover from other tubes does not contaminate it and skew coagulation results. Green (heparin) and lavender (EDTA) tubes come later, and gray (sodium fluoride/potassium oxalate) tubes are last because their additives most severely interfere with other tests if carried over.

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In the CLSI order of draw, which of the following tubes is collected last?

• Gray (sodium fluoride/potassium oxalate) tube (correct answer)
• Green (lithium heparin) tube
• Lavender (EDTA) tube
• Serum separator (gold/red-gray) tube

The gray tube containing sodium fluoride and potassium oxalate is drawn last because those additives cause the most interference if carried over into other tubes. Serum separator tubes are drawn after coagulation tubes, heparin tubes come next, and EDTA (lavender) is drawn before the gray tube. Following this sequence prevents additive carryover from altering earlier test results.

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A light-blue sodium citrate tube is used for coagulation testing. Why must this tube be filled completely to the indicated fill line?

• To keep the blood-to-additive (anticoagulant) ratio correct (correct answer)
• To prevent the serum from separating too quickly
• To ensure the clot forms within five minutes
• To dilute the specimen for accurate glucose results

Sodium citrate tubes rely on a fixed 9:1 blood-to-anticoagulant ratio; underfilling leaves excess citrate that binds reagents and falsely prolongs clotting times such as PT and PTT. The additive is an anticoagulant, so it prevents rather than causes clot formation, and citrate tubes are not used for glucose. Serum separation is irrelevant because coagulation testing uses plasma, not serum.

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Which additive is contained in a lavender (purple)-top tube used for a complete blood count (CBC)?

• Sodium citrate
• Lithium heparin
• Sodium fluoride
• EDTA (ethylenediaminetetraacetic acid) (correct answer)

Lavender-top tubes contain EDTA, which binds calcium to prevent clotting while preserving cell shape and size, making it ideal for CBCs and blood smears. Sodium citrate is in light-blue coagulation tubes, lithium heparin is in green tubes for many chemistry tests, and sodium fluoride is the glucose-preserving additive in gray tubes. Using the wrong tube would compromise the cell counts.

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A gray-top tube contains sodium fluoride. What is the primary purpose of this additive?

• To inhibit glycolysis and preserve glucose (correct answer)
• To promote rapid clot formation
• To bind calcium for coagulation studies
• To prevent hemolysis during transport

Sodium fluoride is an antiglycolytic agent that stops blood cells from consuming glucose, preserving the true glucose level so results are not falsely lowered by delays before testing. It does not promote clotting; gray tubes usually also contain potassium oxalate as an anticoagulant. Calcium binding for coagulation is the role of citrate, and fluoride does not specifically prevent hemolysis.

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Why should a tourniquet be left in place no longer than one minute during venipuncture?

• It causes the patient's blood pressure to rise dangerously
• It makes the vein disappear completely after 30 seconds
• It sterilizes the site and reduces infection risk
• Prolonged application causes hemoconcentration that alters results (correct answer)

Leaving a tourniquet on longer than about one minute causes hemoconcentration, in which fluid leaves the vessel and analytes such as proteins, potassium, and cholesterol become falsely elevated. A tourniquet does not sterilize the skin, and while veins may become harder to feel, the main concern is specimen quality. If a vein cannot be found in a minute, release the tourniquet and reapply after two minutes.

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After inserting the needle, a phlebotomist notices bright red blood pulsing rapidly into the tube. What is the most likely explanation and correct response?

• A vein was entered; continue the draw normally
• The needle is in a nerve; twist it to reposition
• This is normal for a butterfly draw; slow down collection
• An artery was punctured; remove the needle and apply firm pressure (correct answer)

Bright red, pulsating blood indicates accidental arterial puncture; the needle should be removed immediately and firm pressure held for at least five minutes until bleeding stops, with the specimen and event documented. Continuing the draw or repositioning the needle risks further injury. Pulsatile bright-red flow is never normal for a routine venous butterfly collection.

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A winged infusion (butterfly) set is often chosen for which patient situation?

• Drawing from a large, prominent antecubital vein
• Drawing a large-volume blood donation
• Performing arterial blood gas collection
• Collecting from small, fragile hand veins or on children (correct answer)

A butterfly set has flexible tubing and a smaller-gauge needle at a shallow angle, making it well suited to small or fragile veins such as those in the hand and to pediatric or geriatric patients. Large antecubital veins are handled well by a straight needle. Arterial gases require special arterial technique and equipment, and blood donations use larger-bore needles for volume collection.

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When a coagulation (light-blue citrate) specimen is the only tube ordered and it is drawn with a butterfly set, why is a discard tube sometimes drawn first?

• To warm the tubing before collection
• To rinse the needle with anticoagulant
• To check whether the patient is bleeding normally
• To clear the air in the tubing so the citrate tube fills to the correct volume (correct answer)

A winged set's tubing contains air that would otherwise occupy part of the citrate tube's vacuum, leaving it underfilled and throwing off the critical 9:1 blood-to-additive ratio; a small discard tube pulls that air out first so the coagulation tube fills completely. The discard step is about volume accuracy, not warming, rinsing the needle, or assessing bleeding.

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When using a syringe for venipuncture, why should the collected blood be transferred to evacuated tubes using a needleless blood transfer device rather than pushing it through a needle?

• It reduces the risk of needlestick injury and specimen hemolysis (correct answer)
• It fills the tubes faster than any other method
• It eliminates the need to follow the order of draw
• It allows the tubes to be filled in any order safely

A blood transfer device lets the tube's vacuum draw blood in safely, reducing needlestick risk and preventing the hemolysis that occurs when blood is forced through a needle under pressure. Speed is not the reason. The order of draw still must be followed when filling tubes from a syringe, because additive carryover and clotting concerns remain the same.

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For a capillary (dermal) puncture on an adult, which site is most appropriate?

• The center (pad) of the fingertip
• The earlobe
• The plantar surface of the heel
• The fleshy side of the tip of the middle or ring finger (correct answer)

On adults, capillary punctures are made on the fleshy palmar surface of the distal segment of the middle or ring finger, slightly off-center from the very tip. The exact center of the fingertip has less tissue over bone and more nerves. The earlobe is not recommended, and the heel is used for infants under about one year, not adults.

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During a heel stick on an infant, which area must be avoided to prevent injuring the calcaneus (heel bone)?

• The lateral plantar surface of the heel
• The posterior curve (back curve) and central area of the heel (correct answer)
• The medial plantar surface of the heel
• The junction of the medial and lateral plantar surfaces

Heel punctures must stay on the medial or lateral portions of the plantar (bottom) surface; the posterior curve of the heel and the central area must be avoided because the calcaneus is close to the surface there and puncture can cause bone injury or osteomyelitis. The medial and lateral plantar zones are the safe sites, so the back curve and center are the regions to avoid.

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When performing a capillary collection, why is the first drop of blood wiped away before collecting the specimen?

• The first drop contains too many white blood cells
• Wiping it warms the puncture site
• The first drop is always hemolyzed
• The first drop is contaminated with tissue fluid and can affect results (correct answer)

The first drop is diluted with excess tissue (interstitial) fluid released by the puncture and can contain residual alcohol, so it is wiped away to avoid falsely altered results and specimen contamination. It is not specifically high in white cells or automatically hemolyzed, and wiping does not warm the site; warming is done before the puncture to increase blood flow.

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A patient has had a mastectomy on the right side with lymph node removal. Where should the phlebotomist draw blood?

• From the left arm, away from the affected side (correct answer)
• From the right arm on the surgery side
• From either arm since healing is complete
• From a hand vein on the right side only

Blood should be drawn from the arm on the opposite (unaffected) side because lymph node removal impairs drainage on the surgical side, raising the risk of infection and lymphedema and possibly altering results. When both arms are affected or unavailable, the nurse or provider must be consulted; the phlebotomist does not simply default to the affected side or a hand vein there.

A phlebotomist is asked to draw from an arm with an actively running IV line. What is the correct approach?

• Draw directly above the IV site for accuracy
• Turn off the IV and draw immediately from the same site
• Draw from the other arm, or below the IV after it has been stopped per protocol (correct answer)
• Draw from the IV line itself without any preparation

The preferred choice is to collect from the opposite arm to avoid IV fluid contaminating the specimen. If the same arm must be used, collection is done below the IV site only after the infusion has been stopped for the time specified by protocol, with the first tube discarded. Drawing above a running IV contaminates the sample, and phlebotomists do not draw from IV lines themselves unless specifically trained and authorized.

Which of the following complications is most directly caused by probing or repositioning the needle laterally in search of a vein?

• Hemoconcentration
• Lipemia
• Petechiae
• Nerve injury (correct answer)

Blind or lateral probing with the needle can strike a nerve, causing sharp shooting pain, tingling, or numbness, and the draw should be stopped immediately if the patient reports these symptoms. Hemoconcentration comes from a prolonged tourniquet, petechiae are tiny surface hemorrhages often signaling a clotting problem, and lipemia is a milky serum appearance from high lipids, none of which are caused by needle probing.

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Small red or purple spots (petechiae) that appear on a patient's skin when the tourniquet is applied most likely indicate:

• The patient is dehydrated
• An allergic reaction to the antiseptic
• The tourniquet is too loose
• A possible coagulation or platelet problem (correct answer)

Petechiae are tiny hemorrhages under the skin that suggest the patient may have a platelet or capillary/coagulation abnormality, warning the phlebotomist that the site may bleed more than usual and to hold pressure longer. They are not a sign of dehydration or a loose tourniquet, and they are not an antiseptic allergy, which would present as redness, itching, or a rash.

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To prevent hemolysis of a blood specimen, the phlebotomist should:

• Gently invert additive tubes the recommended number of times (correct answer)
• Vigorously shake tubes to mix the additive
• Draw all specimens with the smallest possible needle gauge
• Store all tubes in a warm incubator until transport

Additive tubes should be mixed by gentle inversions the number of times the manufacturer specifies, because vigorous shaking ruptures red cells and causes hemolysis that can falsely raise potassium and other analytes. An excessively small-gauge needle can also hemolyze blood by forcing it through a narrow opening, and routine specimens are not incubated warm; many are kept at room temperature or refrigerated per protocol.

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What is the correct action after a venipuncture is complete and the needle has been withdrawn?

• Recap the needle by hand and set it aside
• Bend the needle before placing it in the trash
• Activate the safety device and dispose of the needle in a sharps container (correct answer)
• Rinse the needle and reuse it on the same patient

OSHA requires activating the built-in safety device immediately after withdrawal and discarding the entire assembly in a puncture-resistant sharps container. Recapping by hand and bending needles are prohibited because they are common causes of needlestick injuries, and needles are single-use devices that are never rinsed or reused.

After collecting a serum separator (SST) tube, how long should the specimen be allowed to clot before centrifugation?

• It can be centrifuged immediately
• About 30 minutes at room temperature (correct answer)
• At least 2 hours refrigerated
• Overnight before spinning

Serum tubes must fully clot, generally about 30 minutes at room temperature, before centrifugation so the fibrin clot separates cleanly and does not contaminate the serum. Spinning too early leaves fibrin strands and incomplete separation. Excessively long or refrigerated delays are unnecessary for routine serum and can affect temperature-sensitive analytes.

Why must plasma or serum generally be separated from the cells within about two hours of collection for many chemistry tests?

• Cells continue to metabolize and alter analyte concentrations (correct answer)
• The specimen will clot if not separated
• The label will fall off after two hours
• The centrifuge cannot spin older specimens

Blood cells stay metabolically active, consuming glucose and releasing potassium and other substances, so leaving serum or plasma in contact with cells too long falsely changes results; separating within about two hours preserves accuracy. Separation is not about label adhesion or centrifuge capability, and an anticoagulant tube will not clot, yet it still needs timely separation to keep results accurate.

During centrifugation of blood tubes, why must the centrifuge always be loaded with tubes in a balanced (symmetrical) arrangement?

• To make the tubes spin faster
• To keep the serum from separating unevenly
• To prevent vibration that can break tubes and create aerosols (correct answer)
• To reduce the electricity the centrifuge uses

An unbalanced centrifuge vibrates violently, which can shatter tubes and release infectious aerosols, so tubes of equal size and volume are placed opposite one another. If there is an odd number, a water-filled balance tube is added. Balancing is a safety and equipment-protection measure, not a way to spin faster, separate serum better, or save power.

A specimen tube is labeled QNS after processing. What does this indicate?

• The quality of the needle was substandard
• The specimen was quickly nullified for safety
• The quantity of specimen is not sufficient for testing (correct answer)
• The tube required a quick new spin

QNS stands for quantity not sufficient, meaning too little specimen was collected to perform the ordered test, which usually requires recollection. It has nothing to do with needle quality or spinning. Recognizing QNS at processing prevents delays from attempting to run a test that cannot yield a valid result.

A blood specimen for bilirubin is light-sensitive. How should it be handled after collection?

• Placed in an ice-water slurry immediately
• Exposed to bright light to stabilize it
• Kept warm at body temperature
• Protected from light, for example wrapped in foil or an amber tube (correct answer)

Bilirubin breaks down when exposed to light, so specimens are protected using foil wrapping or amber tubes to prevent falsely low results. Chilling in ice water is required for other analytes such as ammonia or lactic acid, not specifically for light protection, and keeping bilirubin warm or exposing it to light would degrade the analyte and invalidate results.

Which specimen must be transported chilled in an ice-water slurry to preserve the analyte?

• Ammonia (correct answer)
• Complete blood count (CBC)
• Cold agglutinins
• Blood culture

Ammonia is unstable at room temperature because cell metabolism continues to generate it, so the specimen is chilled in an ice-water slurry to slow that process. Cold agglutinins are the opposite, requiring transport kept warm at body temperature. A routine CBC is transported at room temperature, and blood cultures must be kept warm, not chilled.

A cold agglutinin specimen must be handled differently from most chilled specimens because it should be:

• Frozen solid immediately after collection
• Kept warm at body temperature until the serum is separated (correct answer)
• Protected from light in an amber tube
• Centrifuged before it has clotted

Cold agglutinins are antibodies that clump red cells at cold temperatures, so the specimen must be kept warm at about body temperature (37 degrees C) from collection until the serum is separated, or the antibodies will bind to the cells and be removed, falsely lowering the result. Freezing or chilling causes exactly the error being avoided, light protection is for bilirubin, and serum tubes must clot fully before centrifugation.

In a legal (chain-of-custody) drug screen collection, the chain-of-custody form primarily serves to:

• Speed up laboratory testing of the specimen
• Document every person who handled the specimen from collection to testing (correct answer)
• Replace the need to label the specimen
• Record the patient's insurance information

Chain of custody is a legal record documenting the identity of every individual who collected, transferred, or handled the specimen, along with dates and times, so the sample can be defended as tamper-free in legal proceedings. It does not speed up testing, replace labeling, which is still required, or capture insurance data, which is unrelated to specimen integrity.

When labeling a blood tube after collection, when and where should the tube be labeled?

• Before the draw, at the phlebotomist's workstation
• Later in the laboratory after several patients are collected
• Immediately after the draw, at the patient's side (correct answer)
• Only if the specimen appears abnormal

Tubes must be labeled immediately after collection while still at the patient's bedside or chairside, and the information verified against the patient, to prevent mislabeling and misidentification. Pre-labeling before the draw risks labeling a tube that is never filled or is filled for a different patient, and delaying labeling until the lab is a serious identification error regardless of how the specimen looks.

A required label element on every blood specimen tube includes the patient's name, identification number, date, time of collection, and:

• The patient's room number
• The phlebotomist's initials or identifier (correct answer)
• The ordering physician's home address
• The patient's insurance carrier

Standard labeling requires patient name, a unique identifier, the collection date and time, and the initials or ID of the person who drew the specimen, so any question about the draw can be traced back to the collector. The room number is not a permanent identifier, and the physician's address and insurance carrier are not part of specimen identification labeling.

OSHA's Bloodborne Pathogens Standard requires employers to offer which vaccination to at-risk employees at no cost?

• Influenza vaccine
• Hepatitis B vaccine (correct answer)
• Tetanus vaccine
• Hepatitis C vaccine

The Bloodborne Pathogens Standard requires employers to make the hepatitis B vaccine series available free of charge to employees with occupational exposure. There is no hepatitis C vaccine available, so it cannot be required. Influenza and tetanus vaccines are important for health workers but are not the vaccine mandated free by this specific standard for bloodborne exposure protection.

Under Standard Precautions, how should a phlebotomist treat every patient's blood and body fluids?

• As infectious only if the patient has a known diagnosis
• As safe if the patient looks healthy
• As potentially infectious regardless of the patient's diagnosis (correct answer)
• As infectious only in isolation rooms

Standard Precautions require treating all blood and body fluids from every patient as potentially infectious because carriers of bloodborne pathogens cannot be identified by appearance or known diagnosis alone. Assuming safety based on a healthy appearance, absence of a diagnosis, or location outside isolation would expose the phlebotomist to undetected pathogens.

Immediately after a needlestick injury with a used needle, the phlebotomist's first action should be to:

• Report to the supervisor before doing anything else
• Wash the wound with soap and running water (correct answer)
• Squeeze the site to force out as much blood as possible
• Apply a caustic agent such as bleach to the wound

The first step after a needlestick is to wash the site immediately with soap and running water, then report the exposure and follow the facility's post-exposure protocol, which includes evaluation for prophylaxis. Reporting is essential but comes right after washing. Squeezing the wound is not recommended and can cause tissue damage, and caustic agents like bleach should never be applied to a wound.

Which sequence correctly describes removing personal protective equipment (PPE) and performing hand hygiene when leaving an isolation room?

• Remove gloves, then gown, then mask, then perform hand hygiene (correct answer)
• Remove mask first, then gown, then gloves
• Perform hand hygiene first, then remove all PPE
• Remove gown first, then gloves, then perform hand hygiene inside the room

The most contaminated items are removed first, so gloves come off, then the gown, and the mask or respirator is removed last after leaving the room, with hand hygiene performed after removal. Taking the mask off first risks touching the face with contaminated hands. Hand hygiene is a final step, not a substitute for correct removal order, and full doffing is not completed with all PPE removed inside the room.

A phlebotomist overhears a coworker discussing a patient's lab results in a crowded elevator. This is a violation of:

• OSHA regulations
• HIPAA patient confidentiality rules (correct answer)
• CLSI order of draw
• The chain-of-custody procedure

HIPAA protects patient health information, and discussing identifiable results where others can overhear breaches that confidentiality. OSHA governs workplace safety such as bloodborne pathogen exposure, CLSI order of draw addresses tube sequence, and chain of custody covers legal specimen handling, none of which relate to the improper disclosure of a patient's private information.

According to HIPAA, a phlebotomist may share a patient's protected health information:

• With anyone the patient's family requests
• With coworkers to satisfy general curiosity
• Only with those directly involved in the patient's care or as the patient authorizes (correct answer)
• On social media if the patient's name is omitted

Protected health information may be shared only for treatment, payment, or health care operations with those who need it, or as the patient specifically authorizes. Sharing with family without authorization, satisfying curiosity, or posting details on social media all violate HIPAA, and removing a name does not make a post safe when other details could still identify the patient.

When is the single most important time for a phlebotomist to perform hand hygiene in relation to patient contact?

• Only at the start and end of the shift
• Only after removing gloves
• Before and after every patient contact (correct answer)
• Only when hands look visibly soiled

Hand hygiene must be performed before and after each patient contact, which is the most effective way to prevent transmitting infection between patients. Cleaning only at shift boundaries, only after glove removal, or only when hands look dirty misses countless opportunities for transmission; gloves are not a substitute for hand hygiene, which is still required after they are removed.

Which class of fire extinguisher is appropriate for an electrical fire, such as one involving a centrifuge?

• Class A
• Class B
• Class C (correct answer)
• Class D

Class C extinguishers are designed for electrical fires and use a non-conductive agent, making them correct for equipment like a centrifuge. Class A is for ordinary combustibles such as paper, Class B is for flammable liquids, and Class D is for combustible metals. Many laboratory extinguishers are multipurpose ABC units, but the electrical rating needed is Class C.

The acronym RACE, used in fire safety response, stands for:

• Rescue, Alarm, Contain, Extinguish (correct answer)
• Report, Alert, Contain, Evacuate
• Rescue, Alert, Call, Escape
• Remove, Assess, Control, Exit

RACE stands for Rescue anyone in danger, sound the Alarm, Contain the fire by closing doors, and Extinguish it if small or Evacuate. This structured order prioritizes life safety first. The other option sets rearrange or invent steps and do not match the standard health care fire-response acronym taught for emergency preparedness.

Where can a phlebotomist find information about the hazards, safe handling, and first-aid measures for a chemical used in the lab?

• The Safety Data Sheet (SDS) (correct answer)
• The chain-of-custody form
• The requisition slip
• The CLSI order of draw chart

A Safety Data Sheet provides standardized information on a chemical's hazards, safe handling, storage, exposure controls, and first-aid measures, and must be accessible to employees under the Hazard Communication Standard. The chain-of-custody form tracks specimens legally, the requisition orders tests, and the order-of-draw chart lists tube sequence, none of which describe chemical hazards.

A phlebotomist notices the sharps container is about three-quarters full. What is the correct action?

• Push the contents down to make more room
• Empty it into the regular biohazard bag
• Keep using it until it is completely full
• Replace it before it passes the marked fill line (correct answer)

Sharps containers should be replaced when they reach about three-quarters full or the marked fill line to prevent overfilling and protruding sharps that cause injuries. Pushing contents down or forcing more in risks a needlestick, using it until completely full is unsafe, and sharps must never be emptied into a bag; the sealed container itself is disposed of as regulated medical waste.

Quality control in phlebotomy specimen collection is best demonstrated by:

• Drawing tubes in any convenient order to save time
• Reusing tubes that were not completely filled
• Following the correct order of draw, fill volumes, and mixing to ensure valid results (correct answer)
• Labeling specimens only when time permits

Quality control at the collection stage means following the correct order of draw, filling tubes to the proper volume, mixing additive tubes adequately, and labeling accurately so that pre-analytical errors do not compromise results. Drawing in a convenient order, reusing underfilled tubes, or delaying labeling all introduce errors that can invalidate testing.

A patient becomes pale, sweaty, and says he feels faint during a venipuncture. What should the phlebotomist do first?

• Continue quickly to finish the draw
• Remove the tourniquet and needle and lower the patient's head (correct answer)
• Leave the patient alone to recover
• Give the patient food immediately

Signs of an impending faint (syncope) require stopping the draw at once by releasing the tourniquet, removing the needle, and helping the patient lower the head or lie down to restore blood flow to the brain, while staying with them. Continuing the draw endangers the patient, leaving them alone risks a fall, and giving food to a person who may lose consciousness poses an aspiration hazard.

A phlebotomist should decontaminate a small blood spill on a countertop using:

• Plain water and a paper towel
• A dry cloth to wipe it away
• An appropriate disinfectant such as a freshly prepared 1:10 bleach solution (correct answer)
• Hand sanitizer applied to the surface

Blood spills are decontaminated with an EPA-registered disinfectant effective against bloodborne pathogens or a fresh 1:10 dilution of household bleach, after absorbing the spill with appropriate gloves and PPE. Plain water and dry wiping do not kill pathogens and can spread contamination, and hand sanitizer is for skin, not for disinfecting a blood-contaminated surface.

A phlebotomist cannot obtain blood after two attempts on a patient. What is the most professional next step?

• Attempt several more times until successful
• Ask another qualified phlebotomist to attempt the draw (correct answer)
• Tell the patient the test cannot be done
• Report the patient as uncooperative and leave

Standard practice limits a phlebotomist to two attempts, after which another qualified collector should try so the patient is not subjected to repeated unsuccessful sticks. Continuing to attempt many times causes unnecessary pain and tissue damage. Telling the patient the test is impossible or blaming them is unprofessional and neglects the patient's legitimate need for the test.

A conscious adult patient states he does not want his blood drawn and refuses the procedure. What should the phlebotomist do?

• Draw the blood anyway because it was ordered
• Respect the refusal and notify the nurse or provider (correct answer)
• Physically hold the patient's arm still
• Tell the patient he will be charged if he refuses

A competent adult has the right to refuse a procedure, so the phlebotomist must honor that refusal and inform the nurse or ordering provider, documenting per policy. Proceeding without consent can constitute battery, physically restraining the patient is assault, and threatening the patient with charges is coercive and unethical. Respecting autonomy is a core professional and legal obligation.

To help locate a vein that is difficult to feel, an acceptable technique is to:

• Vigorously slap the antecubital area repeatedly
• Apply a warm compress to the site to promote dilation (correct answer)
• Have the patient pump the fist continuously during the draw
• Leave the tourniquet on for five minutes to enlarge the vein

A warm compress dilates veins and makes them easier to palpate and access, a safe and recommended technique for difficult draws. Slapping the site can cause bruising and hemolysis, vigorous fist pumping falsely elevates potassium and other analytes, and leaving a tourniquet on for five minutes causes hemoconcentration and can harm the patient, so those approaches are not acceptable.

Which antiseptic is generally required for cleaning the site before drawing a blood culture, rather than the isopropyl alcohol used for routine draws?

• Povidone-iodine or chlorhexidine (correct answer)
• Hydrogen peroxide
• Plain soap and water
• Benzalkonium chloride wipe

Blood cultures require a stronger antiseptic such as chlorhexidine gluconate or povidone-iodine to thoroughly disinfect the skin and prevent contaminating microorganisms from producing false-positive cultures; isopropyl alcohol alone is insufficient. Hydrogen peroxide and plain soap are not standard skin antiseptics for cultures, and benzalkonium chloride is not the recommended agent for this high-risk collection.

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For a routine venipuncture, after cleansing the site with 70% isopropyl alcohol the phlebotomist should:

• Fan or blow on the site to dry it faster
• Allow the alcohol to air-dry completely before puncture (correct answer)
• Wipe the alcohol off immediately with gauze
• Puncture the site while it is still wet

Alcohol must be allowed to air-dry completely so it can exert its antiseptic effect and so residual alcohol does not enter the puncture, which would sting the patient and can hemolyze the specimen. Fanning or blowing recontaminates the site with airborne organisms, wiping it off removes the antiseptic before it works, and puncturing while wet causes stinging and possible specimen contamination.

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A test requires a two-hour postprandial glucose specimen. This means the blood must be collected:

• After the patient has fasted for two hours
• Two hours before the patient eats
• Two hours after the patient begins a meal (correct answer)
• At any time within two hours of the order

Postprandial means after a meal, so a two-hour postprandial glucose is drawn two hours after the patient starts eating, timed to assess how the body handles a glucose load. It is not a fasting test, is not drawn before eating, and the two-hour interval is specific to the meal, not to when the order was placed, so accurate timing is essential for valid interpretation.

A phlebotomist is unable to read part of a handwritten requisition and is unsure which tests are ordered. The best action is to:

• Guess the most likely tests and draw them
• Draw one of every tube type to be safe
• Clarify the order with the ordering provider or nurse before drawing (correct answer)
• Skip the unclear tests and draw only the legible ones

An unclear or incomplete requisition must be clarified with the ordering provider or nurse before collection so the correct tubes and volumes are drawn and the patient is not stuck unnecessarily. Guessing risks wrong or missed tests, drawing every tube type wastes blood and resources and may still miss the correct test, and skipping unclear tests could omit needed diagnostics.

A hematoma begins to form under the skin during a venipuncture. What should the phlebotomist do?

• Continue the draw and ignore the swelling
• Push the needle deeper to reach the vein
• Release the tourniquet, remove the needle, and apply firm pressure (correct answer)
• Apply the tourniquet more tightly to stop it

A hematoma means blood is leaking into the tissue, so the phlebotomist should release the tourniquet, withdraw the needle, and apply firm direct pressure to limit bruising and swelling. Continuing the draw worsens the leak, advancing the needle can cause more damage or an arterial stick, and tightening the tourniquet increases pressure and makes the hematoma larger.

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When drawing blood from a young pediatric patient, the phlebotomist should communicate with the child by:

• Promising it will not hurt at all
• Ignoring the child and speaking only to the parent
• Using simple, honest, age-appropriate explanations (correct answer)
• Using complex medical terminology to sound authoritative

Children respond best to simple, honest, age-appropriate explanations that build trust without overwhelming them; involving the caregiver helps too. Promising no pain is dishonest and can destroy trust when the child feels the stick. Ignoring the child increases anxiety, and complex medical terms confuse a young patient rather than reassure them, undermining cooperation and professionalism.

Why should a phlebotomist confirm that bleeding has stopped and pressure was applied adequately before leaving the patient?

• To ensure the tube is labeled correctly
• To prevent continued bleeding and hematoma formation at the site (correct answer)
• To verify the order of draw was correct
• To document the patient's insurance

Confirming that bleeding has stopped and pressure was applied adequately prevents ongoing bleeding and hematoma formation, which is especially important for patients on anticoagulants. This safety check is unrelated to labeling, which happens right after the draw, to verifying the order of draw, or to insurance documentation, all of which are separate steps in the collection and processing workflow.