The Fasting Patient and the Morning Draw
It is 07:40 at an outpatient clinic. Mr. Alvarez, 68, is scheduled for a fasting lipid panel and a CBC. He tells you he last ate at 21:00 the previous evening and took his morning metformin with a sip of water at 06:00 because 'the bottle said with breakfast.' He is alert, oriented, and reports no symptoms. The provider's order reads 'fasting lipid panel, CBC, and point-of-care glucose now.' You have a 06:00-drawn glucose result of 96 mg/dL already in the chart from a different visit. The clinic's protocol says fasting specimens should be drawn after 8 hours of fasting and that oral hypoglycemics are typically held until after the draw unless the provider directs otherwise.
1. Is the 06:00 glucose result usable for today's order, and how do you proceed with the draw?
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No. The 06:00 value belongs to a prior encounter and cannot substitute for a today specimen; the order specifies 'now.' The patient has fasted ~10.5 hours (21:00 to 07:40), which satisfies the 8-hour fasting window, so the lipid panel is valid. However, he took metformin at 06:00, which is a protocol deviation. The correct action is to draw the ordered specimens, document the metformin timing and the fasting interval on the requisition, and notify the ordering provider so the result can be interpreted with that context. Do not silently discard the specimen or re-schedule without provider input; the fasting status is adequate and the medication timing is a documentation issue, not a reason to withhold the draw.
2. The patient asks whether he should take his evening metformin tonight. What is your response within scope?
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Defer to the provider. Medication timing changes are outside the PCT's scope; you can explain that his morning dose was already taken and that the provider will advise on tonight's dose. Do not tell him to skip or double a dose. Document the question and route it to the provider or RN.