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| Section | Objectives |
|---|---|
| Routine Blood Collections | - Order of draw - Venipuncture procedures - Equipment selection and use |
| Patient Preparation | - Specimen labeling procedures - Patient identification and communication - Site selection and preparation |
| Special Collections | - Capillary puncture (fingerstick/heel stick) - Non-routine specimen collection methods - Pediatric and geriatric considerations |
| Specimen Processing and Handling | - Quality assurance procedures - Specimen transport and storage - Common errors and rejection criteria |
| Safety and Compliance | - OSHA regulations and patient safety - HIPAA and patient confidentiality - Infection control and standard precautions |
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43. Frage
Which of the following is an example of a patient giving a phlebotomist implied consent to complete a blood draw?
Antwort: D
Begründung:
The patient extending their arm is an example of implied consent because the patient's action indicates cooperation with the blood draw without a written or explicit verbal statement. In routine phlebotomy, implied consent often occurs when the patient allows identification, listens to the procedure explanation, and physically presents the arm for collection. Signing a consent form is written consent, not implied consent. Saying "Okay" is verbal or expressed consent because the patient directly communicates agreement. Asking questions about the procedure is not consent by itself; it shows the patient is seeking information before deciding whether to proceed. The phlebotomist must still explain the procedure, verify identity, answer process-related questions within scope, respect refusal, and avoid coercion. Consent is not a technical formality; it is tied to patient rights, communication, and ethical practice. If a patient refuses or withdraws cooperation, the technician should not force collection and should follow facility reporting procedures. Reference topics: Patient Preparation; consent types; patient rights; communication; routine venipuncture preparation.
44. Frage
A phlebotomist is collecting a blood culture from a 6-month-old infant who has no known allergies. Which of the following disinfectants should the phlebotomist use?
Antwort: D
Begründung:
Chlorhexidine gluconate is the best answer for blood culture skin antisepsis in this 6-month-old infant with no known allergies. Blood cultures require stricter skin disinfection than routine venipuncture because contamination can produce false-positive culture results, unnecessary antibiotics, repeat testing, and delayed diagnosis. Sodium polyanethol sulfonate is not a skin disinfectant; it is an anticoagulant/additive used in blood culture media to support organism recovery. Sodium hypochlorite is a bleach-type disinfectant used for environmental decontamination, not patient skin preparation for venipuncture. Hydrogen peroxide is not the standard blood culture skin antiseptic. Chlorhexidine is widely used for effective skin antisepsis, and CDC guidance recognizes chlorhexidine-containing agents in healthcare infection-control contexts when age, skin maturity, and clinical risk are considered. For collection technique, the phlebotomist should cleanse the site properly, allow the antiseptic to dry, avoid repalpating unless sterile technique is used, collect adequate volume, and label/document accurately. Reference topics: Special Collections; blood culture collection; pediatric skin preparation; contamination prevention.
45. Frage
Which of the following is a possible complication of venipuncture collection for a patient who has been on warfarin therapy?
Antwort: A
Begründung:
Prolonged bleeding is the expected complication for a patient on warfarin therapy. Warfarin is an anticoagulant, meaning it interferes with normal clot formation and can increase bleeding time after venipuncture. The phlebotomist should be alert for delayed hemostasis, apply firm pressure after needle removal, avoid having the patient bend the arm sharply, and confirm that bleeding has stopped before applying a bandage and leaving the patient. Blood clotting is the opposite of the expected medication effect. Hemostasis is the normal stopping of bleeding, not a complication. Petechiae can occur from tourniquet pressure, fragile capillaries, or platelet-related issues, but in this question the medication-specific risk is prolonged bleeding. Proper technique reduces complications: release the tourniquet, withdraw the needle smoothly, activate the safety device, apply pressure, and monitor the puncture site. Reference topics: Routine Blood Collections; post-procedure care; anticoagulant therapy; bleeding complications; hemostasis; patient observation. NHA includes routine venipuncture complications and post-collection care within the CPT test plan.
46. Frage
Which of the following patient positions is safest for a patient who reports a history of fainting during blood draws?
Antwort: A
Begründung:
A patient with a history of fainting should be positioned reclining or lying down before collection. Syncope is a common phlebotomy complication and can lead to falls, head injury, needle injury, or specimen loss if the patient is not positioned safely. Standing is never appropriate for venipuncture because a fainting patient can collapse. Sitting on an unsupported exam table is also unsafe because the patient may fall from a height. Sitting with legs crossed can affect circulation and does not protect against syncope. The phlebotomist should ask about prior fainting, observe the patient's color and behavior, explain the procedure calmly, and stop the draw if the patient becomes pale, diaphoretic, dizzy, nauseated, or unresponsive. If syncope occurs, the phlebotomist should remove the needle when safe, activate the safety device, call for assistance, lower the patient's head or follow facility policy, and monitor the patient until help arrives. Reference topics: Patient Preparation; syncope prevention; patient positioning; adverse reactions; venipuncture safety.
47. Frage
Which of the following is the purpose of centrifuging a blood specimen?
Antwort: C
Begründung:
The purpose of centrifuging a blood specimen is to separate specimen components. Centrifugation uses force to separate cells from serum or plasma based on density. In serum separator tubes, centrifugation separates serum from the clot after the specimen has fully clotted. In plasma separator tubes, centrifugation separates plasma from blood cells in the presence of anticoagulant. It does not disinfect the specimen; blood specimens must still be treated as potentially infectious. It does not activate tube additives; additives function through mixing by gentle inversion after collection. It also does not increase specimen volume. Improper centrifugation can damage specimens. Centrifuging too soon, too long, too fast, or at the wrong temperature can cause hemolysis, fibrin formation, poor separation, or analyte instability. The phlebotomist must follow manufacturer and facility instructions for clotting time, centrifuge speed, duration, balancing, and specimen removal. Reference topics: Processing Specimens; centrifugation; serum and plasma separation; specimen integrity; equipment operation.
48. Frage
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