Diagnosis and management of patients with renal lithiasis: -Predicting the likely composition of the stone, in patients who have a radiopaque stone, for whom stone analysis is not available -May aid in designing a treatment program · Aiding in identification of specific risk factors for stones using a 24-hour urine collection · Monitoring the effectiveness of therapy by confirming that the crystallization potential has indeed decreased · Evaluating kidney excretion of acid and urine pH · Estimating a patient's protein intake
Specimen Type
Urine
Container
24 hr Urine Container
Collection Instructions
Container/Tube: 24 Hr Urine Container with diazolidinyl urea (Germall) added at the beginning of collection. Specimen: Send entire 24 Hour Container or 35 mL (25mL min) form well mixed 24 hr urine with TV on sample. Note: For Patients 18 year or younger please indicate Height and weight Collection Instructions: 1) Add 5 mL of diazolidinyl urea as preservative at start of collection or refrigerate specimen during and after collection. 2) Collect urine for 24 hours. 3) Specimen pH should be between 4.5 – 8 and will stay in that range if the preservation is added at the beginning of collection or kept refrigerated during the entirety of the collection. Specimens with pH above 8 indicate bacterial contamination, and testing will be canceled.
Do not attempt to adjust pH as it will adversely affect results. 4) If not using Germall, the specimen must be kept refrigerated during the entirety of the collection and send specimen frozen.
Transport Instructions
Refrigerated
Specimen Stability
3 Days Room Temperature 14 Days Refrigerated 14 Days Frozen
