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Laboratory Medicine

Test Directory / Fluid Total Protein

Fluid Total Protein

Urine monovette or white topped universal (no additives)

TestFluid Total Protein
Common AbbreviationsFLTP
Tube typeUrine monovette or white topped universal (no additives)
Clinical IndicationFluid protein measurement is commonly used to distinguish between transudate and exudate fluid formation. This may be supported by LDH measurement in equivocal cases.
Specimen TypeFluid
Sample typeFluid
Minimum Volume1mL
Special PrecautionsPlease visually inspect samples before sending for analysis and indicate the site of collection. Samples which are very turbid or thick may be rejected as there is a risk of damage to laboratory equipment
StabilityNo specific data available for fluid. Total protien is stable in serum for 4 weeks at 2-8°C and 6 days at 15-20°C
Turnaround TimeInpatient: 6 hours Outpatient/ GP: 24 hours
LaboratoryYork and Scarborough
Reference Interval<25g/L indicates transudate; >35g/L indicates exudate; Light's criteria states a sample is an exudate if fluid protein / serum protein ratio > 0.5, fluid LDH / serum LDH ratio > 0.6 or fluid LDH is greater than two-thirds of upper limit of the serum reference range. For further information please refer to
Limitations Fluid composition tends to be very variable, and the exact mixture of components in a fluid sample can have unpredictable effects on measurement of any one analyte. Our laboratory methods are NOT CE-marked or validated for analysis of fluids, and no specific quality control materials are available. ALL results must be interpreted with caution.
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