How do you interpret arterial blood gas?
"I was recently in a situation where I was reading an arterial blood gas that was difficult to interpret, and I had to use my clinical knowledge to work through the situation. First, I had to determine if the pH was normal. Then, I had to examine the PaCO2, which helped me determine if the blood gasses in the patient were from their respiratory system or from their metabolic functions. After examining their PaCO2, I compared with the HCO3 to determine if the patient's atrial blood gasses were normal. It is a rather involved process, but by following the steps and being patient, I was able to work my way through it."
The interviewer is asking this question to assess the candidate's ability to interpret arterial blood gas. Interpreting arterial blood gas can be difficult and confusing which can lead to incorrect diagnosis. There are many ways that a candidate can successfully answer this question, including speaking about the references they keep on hand to help them interpret results, or they can even speak to their clinical knowledge and expertise on the subject. A particularly strong answer to this question will include an example of when the candidate faced a difficult situation with an arterial blood gas result and was able to use their knowledge and expertise to interpret it.
"In my current anesthesiology assistant role, I consistently have to interpret arterial blood gas, and unfortunately, it is never an easy task. Because of how difficult it is to interpret arterial blood gas sometimes, and the severe consequences of misinterpretation, I keep a quick guide in my pocket so I can reference it if needed. While I do not have to reference the quick guide each time I read an arterial blood gas, I find that having the quick guide is helpful, because if I am in a tight situation, I am able to quickly pull it out and make a confident decision by looking at the chart and determining the abnormal values."
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