Blood Gas Technician, Per-Diem, Rotating Shifts
Posted Sep 21, 2026 · We last checked this listing on Oct 6, 2026
Apply at Northwestern Medicine
Likely interview questions for this role
Written from this job description, not a generic list. Each one notes what the interviewer is really checking.
About your past
This is per diem on rotating shifts. How does that fit your life?
What they are checking: Honest fit with the arrangement the posting states.
What would you do
You get a result that does not fit the patient. What do you do?
What they are checking: The posting names identifying and correcting problems that could affect test performance or reporting.
A clinician calls questioning a result. How does that conversation go?
What they are checking: The posting names communicating with physicians, nurses and therapists.
You come in to cover after not working for a while. What do you check first?
What they are checking: The real skill of per diem laboratory work, which is confirming the instrument before trusting it.
About the work
Tell me about running blood gas analysis and the equipment you have used.
What they are checking: The posting names exacting measurements on whole blood and other fluids.
Walk me through calibrating an analyzer and what you do when a calibration fails.
What they are checking: The posting names preventative maintenance, calibrations and repairs.
How do you know a specimen is not suitable for analysis?
What they are checking: Blood gas specimens degrade fast, and accepting a bad one produces a confident wrong answer.
What do you understand about how respiratory therapy uses your results?
What they are checking: The posting names specialized knowledge of respiratory modalities and cardiopulmonary physiology.
How do you document a problem you found and corrected?
What they are checking: The posting names documenting problems, which is what makes the correction traceable.
Tell me about your degree or college training in a health science.
What they are checking: The posting requires a bachelor's or two years of college training plus laboratory experience.
Practice this interview out loud.
Offer builds a real interview for this exact role at Northwestern Medicine from your resume and this job description, asks the questions one at a time, and tells you what landed. The first one is free.
Practice this out loudThe full job description
As published by Northwestern Medicine.