Key Takeaways
- Phlebotomy interviews test clinical knowledge, patient communication and professional conduct.
- Use the STAR method (Situation, Task, Action, Result) for situational questions.
- Prepare specific examples from your training or previous roles.
- Empathy and patient-centred care matter as much as technical knowledge.
How Phlebotomy Interviews Work
Whether the role is in a hospital, a clinic or mobile phlebotomy, interviews usually cover three areas: clinical competency, patient interaction and professional standards. Some follow a structured format with scored questions; others are more conversational. Below are 20 common questions, grouped by category, with guidance on answering them.
Clinical Knowledge Questions
1. What is the correct order of draw, and why does it matter?
Blood cultures (if needed), citrate (blue), serum (gold/red), heparin (green), EDTA (purple), fluoride (grey). The order prevents additives carrying over between tubes, which would give inaccurate results. For example, EDTA carried into a citrate tube would distort clotting results.
2. How do you prevent haemolysis?
Haemolysis, the rupture of red blood cells, is a common reason samples are rejected. Prevent it by using the right needle size, not drawing through a haematoma, not pulling a syringe plunger too hard, letting the alcohol dry before inserting the needle, mixing tubes by gentle inversion rather than shaking, and transporting samples at the right temperature.
3. What would you do if you cannot find a vein?
Warm the arm, reapply the tourniquet and feel again, trying both arms. Ask the patient to drink some water and return later if time allows. Consider a smaller butterfly needle and the veins on the back of the hand. After two unsuccessful attempts, ask a more experienced colleague rather than causing more discomfort.
4. What would you do after a needlestick injury?
Encourage the wound to bleed (without sucking it), wash it with soap and running water, and cover it. Report it straight away to your manager and occupational health, complete an incident report, and follow occupational health’s advice on risk assessment and follow-up.
5. Which tests may need a fasting sample?
Fasting glucose, some lipid profiles, fasting insulin and some iron studies. I would check the request form and ask the patient whether they have fasted. If they have not, I would check with the requesting clinician whether to go ahead or rebook.
Patient Care Questions
6. How would you manage a patient with severe needle phobia?
Acknowledge the fear without dismissing it, explain the procedure clearly, and offer options: lying down, a butterfly needle, or distraction. Give them control over timing and let them say when they are ready. See also our guide on coping with needle phobia.
7. How do you obtain consent for a blood test?
Explain what I am going to do and why, and ask whether the patient is happy to go ahead. Consent must be informed and voluntary. For patients who lack capacity, follow the Mental Capacity Act and make a best interests decision, ideally with their care team or family.
8. How would you communicate with a patient who does not speak English?
Use a professional interpreter (phone or in person), visual aids and gestures, and avoid relying on family members for clinical conversations. Record that an interpreter was used and the language.
9. What would you do if a patient asked about their results?
Explain that results go to the clinician who requested the test, who will interpret them in the context of the patient’s history. Interpreting results is not part of my role, so I would direct them to that clinician.
10. How do you approach taking blood from a child?
Speak to the child in age-appropriate language, involve the parent, use distraction (bubbles, videos, counting) and a butterfly needle. Never restrain a child forcefully, and pause if they become very distressed.
Professional Questions
11. What is a DBS check, and why is it required?
A Disclosure and Barring Service check looks at a person’s criminal record to help employers recruit safely. Phlebotomists are usually asked for an enhanced check because they work with vulnerable adults and children; it can include a check of the barred lists.
12. Describe infection control in phlebotomy.
Hand hygiene before and after every patient, single-use gloves, cleaning the site and letting it dry, sterile single-use equipment, immediate sharps disposal, and cleaning surfaces between patients, in line with the employer’s IPC policy.
13. What would you do if a colleague was not following hand hygiene procedures?
Raise it with the colleague directly and professionally. If it continued, escalate to the line manager or IPC team. Patient safety comes before worries about working relationships.
14. How do you maintain confidentiality?
Follow data protection law and the employer’s confidentiality policy: do not discuss patients in public areas, lock screens when away, access only the records needed for the role, and keep labels and request forms out of other patients’ sight.
15. How do you handle incident reporting?
Report any incident, such as a needlestick injury, a labelling error, a fall or an adverse reaction, through the employer’s reporting system as soon as possible, with the facts of what happened and what was done. Reporting is about learning, not blame.
Situational Questions
16. A patient faints during the blood draw. What do you do?
Remove the needle safely, lower the patient’s head or lay them flat, raise their legs and make sure their airway is clear. Call for help if available. Stay with them until they recover, offer water, and do not let them leave until they feel well. Record what happened.
17. You realise you have labelled a sample with the wrong patient’s details. What do you do?
Discard the mislabelled sample; it cannot be relabelled. Take a new sample, label it correctly at the point of collection, and report the near-miss.
18. A patient becomes aggressive and refuses. How do you respond?
Stay calm, acknowledge their feelings, and make clear that I will not proceed without consent. Offer to come back later or suggest they talk to their clinician. If I felt unsafe, I would leave the situation and get help.
19. You are running behind with a queue of patients. How do you manage?
Never rush a draw; rushing causes errors and haemolysis. Tell reception about the delay so they can keep patients informed, work efficiently but safely, and ask a manager for support if the delay is significant.
20. Why do you want to work in phlebotomy?
Show genuine motivation: the mix of clinical skill and patient contact, the variety of people you meet, or an experience that inspired you. Avoid answers that are only about convenience.
Final Preparation Tips
- Research the employer and the patients they serve.
- Prepare a few STAR examples you can adapt to different questions.
- Dress smartly but practically.
- Bring your certificates, DBS certificate and proof of identity.
- Prepare a question to ask at the end, such as “what does a typical day look like?”
See also our CV writing guide and cover letter examples.
Booking blood draws for your patients?
Lola Dispatch is an invitation-only platform healthcare businesses use to book mobile blood draws with approved phlebotomists. It does not take bookings from the public.