SMILLER Posted December 5, 2018 Share Posted December 5, 2018 This is a new one for me (after 30 years!) An ER patient presented recently with a MCV of 107 and low MCH, MCHC. This patient was in house at our hospital just last week, with all normal indices. Called the RN in ER who commented that she is expected to have a very high glucose. Googled it and sure enough, hit a few articles like this; https://www.ncbi.nlm.nih.gov/pubmed/7259094 The patient had a glucose over 1400 g/dl. My question is this: for those of you who are aware of this phenomenon, do you attempt a correction and report that out? Apparently this is a in vitro pj=henomenon related to hyperosmolality when the blood sits in the EDTA tube before processing on the ananlyzer. The "cure" is to do a saline replacement and let it sit a bit. Thanks, Scott Link to comment Share on other sites More sharing options...
kimannez Posted December 5, 2018 Share Posted December 5, 2018 Sysmex recommends making a 1:5 dilution of the sample and letting it equilibrate before analyzing. This would be the same procedure for abnormal sodium levels, also. SMILLER 1 Link to comment Share on other sites More sharing options...
nziegler Posted December 7, 2018 Share Posted December 7, 2018 We've seen this once. If we're lucky enough to realize that's the problem, we would saline replace to allow the cells to get re-acquainted with the proper osmolality. (The MCV on our particular patient was 134, so it was a bit obvious) SMILLER 1 Link to comment Share on other sites More sharing options...
Alan Neal Posted December 8, 2018 Share Posted December 8, 2018 We have seen this on a number of occasions - Usually a significant delta change MCV failure, with low MCHC. We don't do a correction, but make a comment: Note the discrepancy with previous MCV. Hyperglycaemia may interfere with RBC indices, esp. MCV. Suggest correlate with glucose levels SMILLER 1 Link to comment Share on other sites More sharing options...
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