In article <l03130308b5d50ffd6083@[131.111.83.31]>, Les Culank
<[log in to unmask]> writes
>Dear Mike,
>
>I agree with all of the comments our colleagues have been making. May I
>add a couple of practical issues?
>
>A 24-hour urine can still be excellent value for money in its traditional
>uses (eg for clearance, and for 24-hour totals such as Na, protein, Ca,
>"VMA", etc) - on condition that the collection is competent. That would
>apply best to our intensive care patients, and also to our hordes of
>nephrology in- and out- patients.
>
>The value of a spot urine for DDx was reinforced in the mid-1980's by the
>evidence-based pro-active renal protective treatment if oliguria is due to
>early renal failure; or iv fluid Rx if due to hypovolaemia.
>
>We stress to our ICU doctors that they should send a spot urine, because
>the stix urine "SG" test is not a valid substitute for measuring osmolalty
>in sick patients.
>
>Best wishes,
>
>Les
>
Excuse my ignorance, Les, but what is 'DDx' ?
In fact I do not quite understand the rest of your 3rd sentence.
Could you elaborate?
Robin Marks
Consultant Chemical Pathologist
Halifax UK
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