RT Book, Section A1 Gomella, Leonard G. A1 Haist, Steven A. SR Print(0) ID 2700536 T1 Chapter 6. Laboratory Diagnosis: Urine Studies T2 Clinician's Pocket Reference: The Scut Monkey, 11e YR 2007 FD 2007 PB The McGraw-Hill Companies PP New York, NY SN 978-0-07-145428-5 LK accessmedicine.mhmedical.com/content.aspx?aid=2700536 RD 2024/04/24 AB For routine urinalysis, a fresh (less than 1-h old), clean-catch urine sample is acceptable. If the analysis cannot be performed immediately, refrigerate the sample. (When urine stands at room temperature for a long time, casts and red cells undergo lysis, and the urine becomes alkalinized with precipitation of salts.) See Chapter 13, Urinary Tract Procedures, for sample collection.