Related Experiment Video
Updated: Jul 31, 2026

Low-Cost, Volume-Controlled Dipstick Urinalysis for Home-Testing
Published on: May 8, 2021
Measuring and estimating daily urine volume in psychiatric patients: strengths and weaknesses
Q A Abbasi1, F E Carbonell, A B Koczapski
1Psychiatry Service, McGuire Veterans Affairs Medical Center, Richmond, Virginia, USA.
Abstract:
We collected daily urine volumes (DUV) from 24 nonpolydipsic psychiatric patients and eight polydipsic schizophrenic patients. At 7 AM and 4 PM, we collected spot urine samples and measured urine creatinine concentration (UCr). Using morning weight and the UCr measurements, we compared actual DUV with estimated DUV using 3 methods to estimate DUV currently available in the literature. Each method of estimating DUV was superior among the polydipsic patients compared with the nonpolydipsic patients. We discuss the strengths and weaknesses of trying to estimate DUV in psychiatric patients. One method was simple but less accurate. The two remaining methods gave similar results but one method was substantially easier to use than the other.
Related Concept Videos
One-Compartment Open Model: Urinary Excretion Data and Determination of k
Drug Dosing in Renal Diseases: Measurement of Glomerular Filtration Rate
Drug Dosing in Renal Diseases: Measurement of Serum Creatinine Concentration and Clearance
Drug Dosing in Renal Diseases: Estimation of Glomerular Filtration Rate Based on Serum Creatinine Concentration
Urine Studies I: Urinalysis
Urodynamic Studies: Uroflowmetry

