3.15
Calculation of the creatinine clearance
The creatinine clearance provides information about renal function.
Press F6
When determining the creatinine concentration with Reflotron
Creatinine using urine as specimen material the sample must
be prediluted in a ratio of 1 + 20 before performing the test.
Use of different dilutions will produce incorrect results in the subse-
quent calculation of the creatinine clearance!
As Reflotron Plus only recognizes the creatinine test strip as such and
not the specimen material used, it is advisable to enter an appropri-
ate label, e.g. “U” for urine, in the last position (position 24) of the
patient identification.
Enter the respective creatinine value, measured in blood, serum or
plasma, and confirm with the “↵” key on the keyboard.
If the value entered is above or below the limit values, Reflotron Plus
indicates this by placing the sign “<” or “>” before the respective
maximum or minimum value.
If the entry is not corrected, Reflotron plus then performs the calcu-
lation with the respective limit value. This also applies to the following
entries.
Enter the creatinine value measured in the urine and confirm with the
“↵” key on the keyboard.
The determination must have been performed with urine diluted
1 + 20. Enter the result obtained with this prediluted urine (do not
multiply the result by 21!).
Values obtained with undiluted urine or with different dilutions will
lead to an incorrect result.
Enter the volume of the timed urine collection in ml.
Press the “↵” key on the keyboard to confirm that the specimen used
for determination of the creatinine in urine was diluted 1 + 20.
Explanation
Calling up the function
CR E A T I NI N E C L EAR A N C E
CR E A S m g/ d l ?
CR E A T I NI N E C L EAR A N C E
CR E A U m g/ d l ?
CR E A T I NI N E C L EAR A N C E
VO L U M E UR I N E m l ?
CR E A T I NI N E C L EAR A N C E
UR I N E D IL 1 + 2 0 YES N O
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