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22720 KT/V Pre-Dialysis Evaluation - Female

KT/V Pre-Dialysis Evaluation - Female
Test Code: KTV-F
Synonyms/Keywords
Urea Clearance, Pre-Dialysis Evaluation ​
Test Components
Test consists of a 24-Hour urine collection for Urea Nitrogen. A Blood Urea Nitrogen (BUN) test must also be ordered separately. ​
Specimen Requirements
Fasting Required Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)		 Pediatric Minimum Volume
(no repeat)
No​
 Urine
AND
Plasma​/Serum
24H Urine Jug
 
Lithium-heparin Plasma Separator (PST), Serum Separator Tube (SST)
Urine Container
 
Lithium or Sodium-heparin Green Top (GTT), ​Red Top Tube (RTT)
10 mL
 
1 mL
​
1 mL
 
0.3 mL
​		 ​
Collection Processing Instructions
Aliquot from a well-mixed 24 hour urine collected without a preservative.
Note: A blood sample for BUN must be ordered separately and collected within 24 hours of the urine collection. Indicate the collection time.
The total volume collected must be measured, recorded, and included with the test request.
 
See (Urine Preservative Cross-Reference 24-Hour and Other Timed Urine) for additional preservative information.​
Specimen Stability Information
Specimen Type Temperature Time
Urine​ Refrigerate​ 7 days​
​ Plasma​/Serum ​Ambient ​5 days
Refrigerate​ 7 days​
Frozen​ 3 months​
Rejection Criteria
​Plasma or serum samples collected in ammonium heparinate or oxalate
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
Marshfield​ Monday through Sunday​ 6-8 hours​ Urease GLDH Rate Assay/Beckman AU​
Test Information
Test consists of a 24-Hour urine collection for Urea Nitrogen. A Blood Urea Nitrogen (BUN) test must also be ordered separately. Please submit patient height and weight on 24-Hr urine card. Based on the serum and urine urea nitrogen, the weekly KT/V will be calculated using the following formula: Weekly KT/V=700 x Urine Urea N/(Serum Urea N x Total Body Water), where Total Body Water is calculated using a formula based on the patient age, sex, height, and weight.​
Reference Range Information
Performing Location Reference Range
 Marshfield ​ Reference ranges are not available​
Outreach CPTs
CPT Modifier
(if needed)		 Quantity Description Comments
84540   ​ ​ ​ ​ ​
Synonyms/Keywords
Urea Clearance, Pre-Dialysis Evaluation ​
Test Components
Test consists of a 24-Hour urine collection for Urea Nitrogen. A Blood Urea Nitrogen (BUN) test must also be ordered separately. ​
Ordering Applications
Ordering Application Description
​Centricity ​KT/V per Week-Female
​Cerner ​KT/V per Week-Female
If the ordering application you are looking for is not listed, contact your local laboratory for assistance.
Specimen Requirements
Fasting Required Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)		 Pediatric Minimum Volume
(no repeat)
No​
 Urine
AND
Plasma​/Serum
24H Urine Jug
 
Lithium-heparin Plasma Separator (PST), Serum Separator Tube (SST)
Urine Container
 
Lithium or Sodium-heparin Green Top (GTT), ​Red Top Tube (RTT)
10 mL
 
1 mL
​
1 mL
 
0.3 mL
​		 ​
Collection Processing
Aliquot from a well-mixed 24 hour urine collected without a preservative.
Note: A blood sample for BUN must be ordered separately and collected within 24 hours of the urine collection. Indicate the collection time.
The total volume collected must be measured, recorded, and included with the test request.
 
See (Urine Preservative Cross-Reference 24-Hour and Other Timed Urine) for additional preservative information.​
Specimen Stability Information
Specimen Type Temperature Time
Urine​ Refrigerate​ 7 days​
​ Plasma​/Serum ​Ambient ​5 days
Refrigerate​ 7 days​
Frozen​ 3 months​
Rejection Criteria
​Plasma or serum samples collected in ammonium heparinate or oxalate
Test Components
Test consists of a 24-Hour urine collection for Urea Nitrogen. A Blood Urea Nitrogen (BUN) test must also be ordered separately. ​
Reference Range Information
Performing Location Reference Range
 Marshfield ​ Reference ranges are not available​
For more information visit:
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
Marshfield​ Monday through Sunday​ 6-8 hours​ Urease GLDH Rate Assay/Beckman AU​
For billing questions, see Contacts
Outreach CPTs
CPT Modifier
(if needed)		 Quantity Description Comments
84540   ​ ​ ​ ​ ​
For most current information refer to the Marshfield Laboratory online reference manual.