Urine Protein Creatinine Ratio

Urine Protein Creatinine Ratio

IDEXX

2 © 2002 IDEXX LABORATORIES, INC. | Proprietary and Confidential | Apr 22, 2023

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Urine P:C Ratio


Product Overview

Urine P:C Ratio Packaged in pairs, 6 ratios per box 2 VetTest runs (1 UPRO, 1 UCRE) Total instrument run time 12

minutes

Sample Preparation Kit 2 fixed volume disposable

pipettes Pipette tips Sterile water Instruction insert

Quality Control UCRE – VetTrol® control

fluid UPRO – UPRO control fluid


What are UPRO and UCRE? UPRO and UCRE are two new VetTest® Chemistry

Slides that will soon be available for use on all VetTest® Chemistry Analyzers.

UPRO is the abbreviation for Urine Protein. UCRE is the abbreviation for Urine Creatinine.

These new VetTest® Slides are specifically calibrated for urine samples


How is a Urine P:C Ratio calculated?

A Urine P:C Ratio is calculated by dividing Urine Protein by Urine Creatinine (UPRO/UCRE).

The new VetTest® Chemistry Slides will be packaged in pairs (1 UPRO next to 1 UCRE) for convenience of running and calculating a Urine P:C Ratio.


How do I run a Urine P:C Ratio on the VetTest®?

1. Perform the urine protein (UPRO) test.2. While the urine protein test is running, prepare the

sample mixture for the urine creatinine test.3. Perform the urine creatinine (UCRE) test.4. Calculate the urine protein:creatinine ratio.


Perform the urine protein (UPRO) test

A. Perform the urine protein (UPRO) test.

1. Select “New Sample” from the VetTest main menu, select the patient species (e.g., canine or feline) and enter the patient identification information.

2. Insert the urine protein slide into the VetTest slide loading tray with the bar code facing up and the notch on the left. Gently push the loading tray in as far as it will go, and then pull it back out.

3. When the analyzer is ready, remove the pipettor from the analyzer’s holder and place a new plastic tip on its end.

4. Push the tip on firmly and put the pipettor back in its holder.

5. When the VetTest display tells you to, lower the pipettor into the urine sample.

6. Press and release the button on top of the pipettor. Keep the pipette tip in the sample until the analyzer beeps twice. Remove the pipettor from the sample.

7. When the analyzer beeps three times, carefully wipe the end of the pipette tip with a twisting motion using a clean, disposable lint-free tissue.

8. Immediately place the pipettor back in its holder. A single beep indicates the start of the sample analysis. Analysis takes approximately six minutes.

Instructions taken from the:


While the urine protein test is running, prepare the sample mixture for the urine creatinine test.

B. Prepare the urine creatinine mixture.1. Attach a clean tip to the yellow MiniPet, draw 10 µL of urine from the sample and place it into a sample cup.

2. Attach a clean tip to the white MiniPet, draw 200 µL of UCRE mix from the bottle and place it into a

sample cup.

3. Use the white MiniPet to draw the mixture up and down in the sample cup 4–5 times to mix it



Perform the urine creatinine (UCRE) test

C. Perform the urine creatinine test.

1. Select “Current Sample” from the VetTest main menu, and select “No” when asked if you want to perform a dilution.

2. Insert the urine creatinine slide into the VetTest slide loading tray with the bar code facing up and the notch on the left. Gently push the loading tray in as far as it will go, and then pull it back out.

3. When the VetTest display tells you to, lower the pipettor into the sample mixture.

4. Press and release the button on top of the pipettor. Keep the pipette tip in the sample until the analyzer beeps twice. Remove the pipettor from the sample.

5. When the analyzer beeps three times, carefully wipe the end of the pipette tip with a twisting motion using a clean, disposable lint-free tissue.

6. Immediately place the pipettor back in its holder. A single beep indicates the start of the sample analysis. Analysis takes approximately six minutes.



Calculate the urine protein:creatinine ratio.

D. Calculate the urine protein:creatinine ratio.

Divide the UPRO result by the UCRE result and compare the value to the suggested reference range that appears on the VetTest printout and above in the IDEXX VetTest Ranges section.



When will UPC be available on VetTest® Chemistry Analyzers?

UPC is on schedule to be introduced in December 2004.

At that time, all VetTest® customers will receive a software upgrade that notifies them that UPC is now available on the VetTest.

The software will automatically upgrade their VetTest with the calibration information necessary to run UPRO and UCRE for dogs and cats.


What are Urine P:C Ratios used for?

A Urine P:C Ratio allows the veterinarian to assess urinary protein loss.

This gives the practitioner the ability to screen for early renal disease, better evaluate underlying disease, monitor disease progression, and measure response to treatment.


What does a Urine P:C Ratio measure? A Urine P:C Ratio is a quantitative measure of protein

loss by the kidneys.

Small amounts of protein can normally be found in urine, however significant amounts of protein in urine can be a sign of renal disease, or other underlying non-renal disease.

A Urine P:C Ratio is used to determine if the amount of protein in the urine (proteinuria) is significant, and if further patient monitoring, investigation, or intervention is necessary.


Why Perform a Urine P:C Ratio? Proteinuria is a growing concern in veterinary

medicine increasing evidence of its association with bad patient outcomes persistent proteinuria with an inactive sediment indicates chronic

kidney disease

UPC is the best available test for: screening for proteinuria, and measuring persistence & magnitude guiding clinical decisions, and monitoring response to therapy

2004 ACVIM Consensus Statement highly supportive of UPC

vets should give more attention to detection, evaluation, monitoring, and treatment of proteinuria


Why is screening for Proteinuria with a UP:C ratio important for the practitioner?

The ability to calculate Urine P:C Ratios quickly and conveniently in-house allows for detection of renal disease months, and even years, before traditional tests would indicate renal damage.

This allows both the practitioner and pet owner significantly more time to provide patient care, thereby extending both the duration and quality of patient lives.


Why is screening for Proteinuria with a UPC ratio important for the pet owner? Renal disease is a progressive, morbid condition that

requires significant time and effort on the part of the pet owner.

The treatments and change in diet and lifestyle require a serious commitment.

Early detection of renal disease decreases the morbidity and improves the prognosis.

Sequential UP:C ratios allow the pet owner to quantify the effects of their labor and treatment, and better care for their pet.


Which patients should be screened using the Urine P:C Ratio? Urine P:C Ratios should be performed in the clinical

evaluation of dogs and cats that: show any sign of renal disease present sick (“ain’t doing right”) are senior patients, where there is a heightened concern about potential renal disease

Should be considered as a component of routine “wellness” evaluations of apparently healthy at-risk dogs and cats.

For animals in which proteinuria is documented or suspected, determinations of UP:C ratios should be performed to guide clinical decision-making and to monitor ongoing trends.


Breed Disposition to Various Renal Diseases Airedale Terriers (RD) Alaskan Malamutes (RD) Basenjis (Fanconi-like syndrome) Beagles (unilateral agenesis, dysplasia,

& polycystic kidneys) Bedlington Terriers (RD) Boxers (RD) Bulldogs (RD) Bull Terriers (glomerulopathy) Cairn Terriers (polycystic kidneys) Chinese Shar-Pei (amyloidosis) Chow Chows (RD) Cocker Spaniels (glomerulopathy) Collies (glomerulopathy) Doberman Pinschers (unilateral

agenesis and glomerulopathy) Golden Retrievers (RD) Great Danes (RD) Great Pyrenees (RD) Irish Wolfhounds (RD) Keeshonds (RD)

King Charles Spaniels (RD) Lhasa Apso (RD) Miniature Poodles (polycystic kidneys) Miniature Schnauzers (RD and Fanconi-

like syndrome) Newfoundlands (glomerulopathy) Norwegian Elkhounds (tubulointerstitial

nephropathy and Fanconi-like syndrome Old English Sheepdogs (RD) Pekingese (unilateral agenesis and RD) Samoyeds (glomerulopathy) Shetland Sheepdogs (unilateral agenesis,

medullary cystic disease and Fanconi-like syndrome)

Shih Tzus (RD) Soft-Coated Wheaten Terriers (RD) Standard Poodles (RD) Swedish Foxhounds (RD) Welsh Corgis (telangiectasia) Yorkshire Terriers (RD)


Interpreting Urine P:C Ratio UP:C (urine protein/urine creatinine) ratios as an

indicator of proteinuria are interpreted differently in canine and feline populations, as well as in azotemic and nonazotemic patients.

Azotemia is an increase in blood urea nitrogen and creatinine levels.

Remember, by the time a patient is azotemic, it has already lost over 75% of its renal function and is in renal failure.

UP:C Ratio = urine protein divided by urine creatinine (UPRO / UCRE)


Urine P:C Ratio Evaluation:

1st: localize the protein to the kidneyProtein may come from sources

BEFORE the kidney IN the kidneyAFTER the kidney

2nd: determine persistenceChronic or AcuteCause of an underlying disease or situation?

3rd: evaluate severity


Localization: 1st priority in UPC analysisCauses of proteinuria can be pre-renal, renal or post-renal

Pre-renal: evaluate for Bence Jones proteins, myoglobin, hemoglobin

Renal: determine level of azotemia Inactive sediment

Post-renal: evaluate urine sediment for signs of inflammation and infection, stones and tumors

Active sediment


Persistence: 2nd priority in UPC analysisDetermine persistence of proteinuria by repeating UP:C Ratios

This should be performed on 3 or more occasions

The tests should be repeated at least 2 weeks apart from one another

Treatment can start immediately!


Evaluation: 3rd priority of Urine P:C Ratio Results

Depends on level of azotemia

Depends on speciesCanineFeline


Evaluation: Non-azotemic animals with persistent proteinuriaNON-AZOTEMIC & PERSISTENT PROTEINURIA WITH INACTIVE URINE SEDIMENT (DOGS & CATS):

UPC < 0.5 – no significant proteinuriaUPC ≥ 0.5 < 1.0 – requires further monitoringUPC ≥ 1.0 < 2.0 – proteinuriaUPC ≥ 2.0 – excessive proteinuria


Evaluation: Azotemic dogs with persistent proteinuriaAZOTEMIC DOGS & PERSISTENT PROTEINURIA WITH INACTIVE URINE SEDIMENT (DOGS):

UPC < 0.5 – no significant proteinuriaUPC ≥ 0.5 – excessive proteinuria


Evaluation: Azotemic cats with persistent proteinuriaAZOTEMIC CATS & PERSISTENT PROTEINURIA WITH INACTIVE URINE SEDIMENT (CATS):

UPC < 0.4 – no significant proteinuriaUPC ≥ 0.4 – excessive proteinuria


Implications of Urine P:C Results:

Proteinuric animals (of renal origin) might benefit from antiproteinuric therapy

Dietary protein restrictionN3 fatty acid supplementationPhosphorus restriction / phosphorus bindersSQ fluid therapyACE (angiotensin-converting enzyme inhibitor treatment) inhibitor therapy

These animals should be monitored frequently to evaluate response to treatment and disease progression


Take Home Message

The VetTest® Urine P:C Ratio is the only in-house, fully quantitative test that allows the veterinarian to:

screen for early renal disease

better evaluate underlying non-renal disease

monitor disease progression

measure response to treatment

Urine Protein Creatinine Ratio

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