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After talking to the physician you find out her labs. Her labs reveled albumin level of 2.1gm/dL, calcium of 7.8mg/dL, glucose 120mg/dL , sodium 138 mmol/L, phenytoin level of 17.8.
Based on the given data which of the following best interprets phenytoin concentration?
Suggested Answer: B
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Corrected phenytoin (mg/L) = Observed phenytoin (mg/L) / (0.2 x albumin [g/dL]) + 0.1 = 17.8 / (0.2 x 2.1) +
0.1 = 17.8 / 0.42 + 0.1 = 42.48mg/L phenytoin level is high. Normal therapeutic range is: 10-20mg/dL
11 comments · newest first
AN
Annamae
11 months ago
I agree, better to repeat the test just to be safe.
EL
Elsa
12 months ago
I thought it was supposed to be lower than that, not sure.
CE
Cecil
12 months ago
Wait, isn't the therapeutic range for phenytoin 10-20?
QU
Quentin
12 months ago
Definitely too high, I've seen this before.
PO
Polly
1 year ago
Phenytoin level is 17.8, which is high.
AD
Adelle
1 year ago
This question is similar to one we practiced where we had to consider lab values affecting drug levels. I think I might lean towards it being too high.
AR
Art
1 year ago
I’m not entirely sure, but I think low albumin levels can affect phenytoin levels, making it seem higher than it actually is.
ST
Stephen
1 year ago
I remember that normal phenytoin levels are usually between 10-20 mcg/mL, so 17.8 seems like it could be within normal limits.
AL
Aleta
1 year ago
I’m confused about whether we need to repeat the level or not. I feel like I’ve seen questions where they suggest repeating if there are abnormal labs.
CR
Cristen
1 year ago
Okay, let's see here. I'm pretty confident that A and C are the right answers - importing a panel configuration file and using the UI Extensions Editor. I'm not sure about the other options, but those two seem like the most straightforward ways to add a custom panel.
KR
Kristin
1 year ago
Okay, let me see here. The main objective is to track the movement of the money, right? That makes the most sense to me based on what I know about financial investigations. I'll go with option D.