" />
Glomerular filtration rate:ArVRat:Pt:Urine Ser/Plas:Qn:Isotopic based on 1.73 sq M - CISMeF
Glomerular filtration rate:ArVRat:Pt:Urine Ser/Plas:Qn:Isotopic based on 1.73 sq MLOINC code
Preferred Label : Glomerular filtration rate:ArVRat:Pt:Urine Ser/Plas:Qn:Isotopic based on 1.73 sq M;
LOINC status : ACTIVE;
LOINC display name : GFR Isotopic based on 1.73 sq M (U S/P) [Vol rate/Area];
LOINC long common name : Isotopic Glomerular filtration rate/1.73 sq M [Volume Rate/Area] in Urine and Serum
or Plasma;
LOINC short name : Isotopic GFR/1.73 sq M Ur SerPl-ArVRat;
LOINC description : This test measures kidney filtration after injection of a radioactive tracer (e.g.
technetium 99m DTPA). It is an actual measurement of glomerular filtration rate (GFR).
The test is a several hour long kidney function test typically performed to accurately
verify the level of renal dysfunction. It requires sequential collection of both blood
and urine specimens after the tracer injection. Isotopic GFR may be used for monitoring
renal function over time, or in chronic renal failure patients approaching dialysis.
[PMID: 1391702] The submitter's lab uses the following formula to determine GFR: GFR
(UV/P) x (1.73/BSA) Where, for each timed urine collection, U (urine collection
CPM UbkgCPM) V urine flow rate: (urine volume / elapsed time) in units of mL/min
P (average serum or plasma CPM Bbkg CPM) The average serum CPM (counts per minute)
will be the average of Bo and B1 for the first urine collection (U1) and the average
of B1 and B2 for the second collection (U2). Average the calculated GFR results for
the two collection periods to obtain the final GFR result.;
Has component