NHA CPT NHA Certified Phlebotomy Technician - Set 4 - Part 2

Correct Answer: Aerobic first, then anaerobic

with a butterfly, the aerobic bottle is filled first to absorb the tubing dead-space air. Filling the anaerobic bottle first would push that air into the oxygen-free environment, compromising recovery of strict anaerobes. Option b is incorrect because anaerobic first applies to the syringe technique rather than the butterfly. With a butterfly, putting anaerobic first introduces tubing air into the anaerobic broth and defeats the bottle purpose. Option c is incorrect because the order does matter and depends on the device. Butterfly mandates aerobic first, syringe mandates anaerobic first, so treating them as interchangeable is incorrect. The standard reflects current practice in routine clinical phlebotomy. Option d is incorrect because pediatric versus adult bottle ordering does not address the dead-space rule. The aerobic-first rule for butterfly stands regardless of bottle size in this scenario. The standard reflects current practice in routine clinical phlebotomy.

Correct Answer: Anaerobic first

with a syringe, the anaerobic bottle is filled first. There is no air in the syringe, and any small air pocket displaced during the transfer is sent into the aerobic bottle, which is supposed to contain air. Option a is incorrect because aerobic first applies to the butterfly technique because of tubing dead-space air. The syringe technique reverses that order for the same reason from a different direction in the workflow. Option b is incorrect because the order does matter even with a syringe, because the small air pocket in the transfer device should reach the aerobic bottle. Treating the order as interchangeable is incorrect for cultures. Option c is incorrect because pediatric versus adult bottle sequencing does not address the air rule. The anaerobic-first rule for syringe applies regardless of bottle size in this scenario. The standard reflects current practice in routine clinical phlebotomy.

Correct Answer: First, before any tube

blood culture bottles are drawn first, before any other tube. The bottles are sterile, and the SPS anticoagulant in the broth would contaminate other tubes if drawn after them in any sequence. Option a is incorrect because drawing cultures last allows skin flora carried into the workflow on later tubes to contaminate the cultures. The standard places cultures first to ensure clean inoculation from the venipuncture. Option c is incorrect because placing cultures between blue and red disregards the contamination logic. Cultures must be first, before any other tube, to maintain sterility and prevent SPS carryover. The standard reflects current practice in routine clinical phlebotomy. Option d is incorrect because placing cultures between green and lavender violates the order entirely. Cultures must come first because of sterility and SPS broth, not in the middle of the standard tube sequence.

Correct Answer: Five milliliters or twice the dead space

the standard discard volume from a central line is typically five milliliters or two times the catheter dead-space volume. The discard clears saline or heparin from the lumen so the specimen reflects venous blood. Option a is incorrect because one drop is insufficient to clear the lumen of a central catheter. The line dead-space typically holds at least one to two milliliters, requiring a larger discard before the actual tube fills. Option b is incorrect because two milliliters covers some smaller dead-space volumes but undershoots most adult central lines. The standard rounds up to five milliliters or twice the dead-space volume for safe specimen quality. Option d is incorrect because twenty milliliters always exceeds the standard discard volume and wastes patient blood. The rule scales with line dead-space rather than fixed at a large arbitrary amount in any case.

Correct Answer: Source site for each set

the source site is critical so the microbiologist can pair positives across two sets. Labels should read source plus set number, such as right antecubital set one and left antecubital set two clearly. Option b is incorrect because the patient social security number is not required on the bottle label and could create privacy exposure if visible. Identifiers are typically name and medical record number on the printed label. Option c is incorrect because antibiotic dose history is recorded on the requisition rather than the bottle label. Bottles need patient identifiers, time, source, and phlebotomist initials, but not antibiotic specifics on the label. Option d is incorrect because the phlebotomist home address has no place on a bottle label. Phlebotomist initials or identification number suffice for traceability without revealing personal contact information. The standard reflects current practice in routine clinical phlebotomy.

Correct Answer: Color returns to palm within fifteen seconds

color returning to the palm within five to fifteen seconds after release of the ulnar artery indicates patent collateral flow. The result supports proceeding with radial puncture because ulnar circulation can perfuse the hand. Option a is incorrect because the palm staying pale after release indicates inadequate ulnar collateral flow. The radial artery on that wrist must not be used, since loss of radial flow during puncture could compromise hand perfusion. Option b is incorrect because the palm turning blue suggests venous stasis or arterial compromise rather than restored arterial flow. The expected finding is brisk pink color return within fifteen seconds, not cyanotic discoloration. Option c is incorrect because mottling does not equate to brisk return of arterial flow. The expected finding is uniform pink color return within the fifteen-second window, supporting safe radial puncture. The standard reflects current practice in routine clinical phlebotomy.

Correct Answer: Lithium heparin

lithium heparin is the preferred ABG syringe additive because it does not falsely elevate sodium results if the same specimen is later run for chemistry. The lithium is small enough not to interfere with most chemistry assays. Option a is incorrect because sodium heparin would falsely elevate sodium results if the specimen were later analyzed for chemistry. The standard prefers lithium heparin specifically to avoid this interference in the assay. Option c is incorrect because ammonium heparin would falsely elevate ammonia and is not used in arterial blood gas syringes. Lithium remains the standard heparin formulation for the ABG syringe across most institutions. Option d is incorrect because heparin-free saline would not anticoagulate the specimen and the blood would clot before analysis. Lithium heparin is the standard, since the syringe must be coated with anticoagulant before draw.

Correct Answer: Ice slurry, analyze within thirty minutes

ABG specimens are placed in an ice slurry of crushed ice and water and transported for analysis within fifteen to thirty minutes. The cold slows leukocyte and platelet metabolism that otherwise distorts gas tensions. Option b is incorrect because dry ice freezes the specimen and ruptures cells, invalidating the analysis. Wet ice slurry is the correct method, with temperature kept above freezing while still slowing metabolism. The standard reflects current practice in routine clinical phlebotomy. Option c is incorrect because room temperature transport allows continued cellular metabolism that consumes oxygen and produces carbon dioxide. Within minutes the gas tensions shift, so room-temperature transport beyond about five minutes is unacceptable. Option d is incorrect because heating the specimen accelerates metabolism and worsens the gas tension shift. The standard requires cold ice slurry transport to slow metabolism, not warming, before timely analysis. The standard reflects current

Correct Answer: Expel air bubbles immediately

air bubbles must be expelled immediately because trapped room air falsely lowers carbon dioxide and falsely raises oxygen tension. Tap the syringe to bring bubbles to the top, then expel before capping for transport. Option a is incorrect because leaving bubbles alone allows oxygen and carbon dioxide to equilibrate with room air, distorting the analysis. The standard requires immediate expulsion before any further transport step. The standard reflects current practice in routine clinical phlebotomy. Option b is incorrect because replacing air bubbles with saline dilutes the specimen and ruins the analysis. The proper step is expulsion of the air, not substitution of any other liquid into the syringe. Option d is incorrect because refrigeration does not dissolve air bubbles in any meaningful way. The bubbles continue to exchange gas with the blood, and the specimen quality drops, so expulsion remains the correct response.

Correct Answer: Chem, micro, cells, cyto

the standard CSF tube order is chemistry first, then microbiology, then cells, then cytology. The order minimizes contamination from the puncture and supports accurate cell counts on the third tube. Option a is incorrect because starting with cells in tube one risks contamination by the small amount of blood from the puncture itself. Chemistry tolerates that contamination better, so chemistry comes first. The standard reflects current practice in routine clinical phlebotomy. Option b is incorrect because starting with cytology disregards the contamination logic. The standard places cytology last because it requires the largest volume and is least sensitive to small puncture-related blood contamination. Option c is incorrect because microbiology first would catch any skin flora introduced by the needle pass before it has been pushed clear by the early cerebrospinal fluid flow. Microbiology comes second, after chemistry.

Correct Answer: Twenty-four to forty-eight hours

the newborn screening filter paper specimen is collected at twenty-four to forty-eight hours of life, after the first feeding to reduce false negatives for galactosemia and amino-acid disorders. Option b is incorrect because drawing within the first hour after birth misses the metabolic build-up that screening tests detect after feeding begins. The standard waits twenty-four hours to allow protein metabolism to start. Option c is incorrect because five days after birth often means after hospital discharge, where the screen may be delayed or missed. The standard targets twenty-four to forty-eight hours specifically to capture the screen before discharge. Option d is incorrect because two weeks after discharge is far too late for several time-sensitive conditions. The standard insists on twenty-four to forty-eight hours so treatable conditions are caught before symptoms develop.

Correct Answer: Three-hour horizontal air-dry

the filter paper is air-dried horizontally for at least three hours away from heat, sunlight, and moisture. Plastic bags trap moisture and degrade the specimen, so paper drying must be open-air during the interval. Option a is incorrect because placing the paper into a plastic bag immediately traps moisture and degrades the dried blood spot. The specimen must finish drying in the open before any sealed transport packaging is applied. Option b is incorrect because refrigerator drying introduces moisture from condensation as the paper warms or cools. Open-air drying at room temperature is the standard, with no refrigeration during the drying phase at all. Option d is incorrect because microwave drying degrades both the paper and the analytes through heat. The standard prohibits any heat source, including microwave, hair dryer, or oven, during the drying phase. The standard reflects current practice in routine clinical phlebotomy.

Correct Answer: About thirty-five core conditions

the federal Recommended Uniform Screening Panel currently includes about thirty-five core conditions plus twenty-six secondary conditions. State panels vary slightly but typically include all the core conditions on the federal list. Option a is incorrect because five core conditions describes an early version of newborn screening when only PKU and a few others were on the panel. The modern panel has expanded substantially through tandem mass spectrometry technology. Option b is incorrect because ten core conditions describes a mid-twentieth-century intermediate panel. The current federal RUSP now includes about thirty-five core conditions thanks to expanded screening technology in modern laboratories. Option c is incorrect because one hundred core conditions overstates the federal panel size. The actual RUSP core list sits around thirty-five conditions, with secondary conditions adding about twenty-six more for the full screening panel.

Correct Answer: Lateral or medial plantar surface of heel

the safe heel-stick site is the lateral or medial plantar surface of the heel, the curved outer or inner edge. The center risks calcaneus injury, and the arch risks nerve injury, so neither is acceptable. Option a is incorrect because the center of the heel overlies the calcaneus bone, where deep puncture can cause osteomyelitis. The plantar edges are far safer, since they avoid the bony prominence underneath the central heel. Option c is incorrect because the big toe pad is not used for newborn capillary collection and lacks the heel's vascular bed. The toe site does not yield reliable specimens for newborn screening tests. Option d is incorrect because the arch of the foot lies near nerves and tendons that should never be punctured during capillary collection. Nerve injury would produce lasting harm, so the standard avoids the arch.

Correct Answer: One hundred ten pounds

the AABB minimum weight for routine whole-blood donation is one hundred ten pounds. Smaller donors risk hypotension and adverse reactions because the standard four hundred fifty milliliter draw represents a larger fraction of total blood volume. Option b is incorrect because ninety pounds is below the AABB minimum and would represent more than thirteen percent of total blood volume in a four hundred fifty milliliter donation. The minimum is set higher to protect the donor. Option c is incorrect because eighty pounds is far below the AABB minimum and would risk severe hypotension during donation. The minimum at one hundred ten pounds protects the donor from fluid-shift reactions. Option d is incorrect because one hundred fifty pounds exceeds the AABB minimum and would unnecessarily disqualify many eligible donors. The minimum at one hundred ten pounds is well below this and supports the donor pool.

Correct Answer: Defer through pregnancy and six weeks postpartum

active pregnancy is a temporary deferral through the pregnancy and approximately six weeks postpartum. The deferral protects both the donor's iron stores and the developing pregnancy from the fluid shift of donation. Option a is incorrect because indefinite deferral implies no future eligibility, which does not match pregnancy. The deferral is temporary and ends after the postpartum recovery interval defined in AABB criteria. The standard reflects current practice in routine clinical phlebotomy. Option b is incorrect because permanent deferral is reserved for specific exposures like Creutzfeldt-Jakob disease history. Pregnancy carries only a temporary deferral until after the postpartum recovery period ends. The standard reflects current practice in routine clinical phlebotomy. Option d is incorrect because no deferral during pregnancy ignores the fluid-shift risk to the donor and the developing pregnancy. The temporary deferral applies throughout pregnancy and the postpartum wind

Correct Answer: No deferral if licensed parlor

if the tattoo was applied at a state-licensed parlor with sterile, single-use needles, no deferral is required under current FDA guidance. Unlicensed or unregulated tattoo settings carry a three-month deferral. Option a is incorrect because indefinite deferral does not match modern FDA guidance for tattoos at licensed parlors. The rule reserves deferral for unregulated settings, not all tattoos categorically. The standard reflects current practice in routine clinical phlebotomy. Option c is incorrect because permanent deferral does not apply to tattoos at any setting. Deferrals exist for tattoos done outside licensed parlors, but the duration is three months rather than permanent under current rules. Option d is incorrect because a three-month deferral applies to tattoos done in unregulated or unlicensed settings. The donor in this scenario received the tattoo at a state-licensed parlor, which carries no deferral under current rules.

Correct Answer: Autologous donation

autologous donation collects blood from the donor for the donor's own future surgical use. The donation is stored separately, labeled for the specific donor, and reduces transfusion-related risks for that surgery. Option a is incorrect because allogeneic donation collects blood from a donor for any patient who needs it. The donation enters the general supply pool rather than being reserved for the original donor's own use. Option b is incorrect because apheresis donation collects specific blood components like platelets or plasma using a machine that separates components and returns the rest. Apheresis is not specifically tied to the donor's own future surgical use. Option c is incorrect because directed donation collects blood from a specific donor for a specific named recipient like a family member. Directed donation differs from autologous, where the donor and recipient are the same person.

Correct Answer: Ninety-nine point five Fahrenheit

the AABB upper temperature limit for donor eligibility is ninety-nine point five Fahrenheit. A donor at ninety-nine point eight is therefore deferred until temperature returns to within normal limits. Option b is incorrect because one hundred Fahrenheit exceeds the AABB upper limit and would also defer the donor. The actual limit sits at ninety-nine point five, which is somewhat tighter than the lay-person fever cutoff. Option c is incorrect because one hundred two Fahrenheit is well above the donor cutoff and represents frank fever requiring deferral. The AABB limit is much tighter to ensure donors are clearly afebrile before donation. Option d is incorrect because ninety-eight point six Fahrenheit is the average normal body temperature rather than the upper limit. The AABB sets ninety-nine point five as the cutoff to allow for some normal variation among donors.

Correct Answer: Twelve point five grams per deciliter

the AABB minimum hemoglobin for female whole-blood donors is twelve point five grams per deciliter. Male donors require thirteen point zero, both protecting the donor from post-donation iron deficiency and anemia. Option a is incorrect because eleven point zero grams per deciliter is below the AABB minimum and would defer the donor. The cutoff at twelve point five protects female donors from post-donation iron deficiency reliably. Option b is incorrect because fifteen grams per deciliter exceeds the AABB minimum and would unnecessarily exclude many eligible female donors. The actual minimum sits at twelve point five for females, which is a more inclusive threshold. Option d is incorrect because eight grams per deciliter is far below the donor minimum and represents frank anemia. The AABB minimum at twelve point five protects donors from worsening anemia after donation.