Comparison of urine urea nitrogen collection times in critically ill patients.
Twenty-four-hour urine urea nitrogen (UUN) collections are used to assess nitrogen loss in critically ill patients but are often difficult to obtain accurately. This prospective study compared 6- and 12-hour UUN collections with 24-hour UUN collections in critically ill patients receiving continuous...
| Publicado en: | Nutrition in Clinical Practice Vol. 20; no. 2; pp. 271 - 276 |
|---|---|
| Autores principales: | , , |
| Formato: | research tables/charts Journal Article |
| Publicado: |
Wiley-Blackwell
2005 Apr
|
| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=106328862&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 106328862 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 08845336 IKQ jtl: Nutrition in Clinical Practice issn: 08845336 maglogo: N pubinfo: dt: 2005 Apr vid: 20 iid: 2 pid: 480 pub: Wiley-Blackwell place: Malden, Massachusetts artinfo: ui: 106328862 106328862 2009127930 10.1177/0115426505020002271 NLM16207662 106328862 ppf: 271 ppct: 5 formats: tig: atl: Comparison of urine urea nitrogen collection times in critically ill patients. aug: au: Graves C Saffle J Morris S affil: Nutrition Care Service, University of Utah Hospital, 50 N Medical Dr, Salt Lake City, UT 84132; caran.graves@hsc.utah.edu sug: subj: Critical Illness Nutritional Support Nutritional Assessment Methods Nitrogen Metabolism Urea Urine Nitrogen Urine Time Factors Specimen Handling Comparative Studies Intensive Care Units Diagnosis, Laboratory Male Female Adolescence Adult Middle Age Aged Descriptive Statistics Critically Ill Patients Data Analysis Software Paired T-Tests Human Adolescent: 13-18 years Adult: 19-44 years Middle Aged: 45-64 years Aged: 65+ years Male Female ab: Twenty-four-hour urine urea nitrogen (UUN) collections are used to assess nitrogen loss in critically ill patients but are often difficult to obtain accurately. This prospective study compared 6- and 12-hour UUN collections with 24-hour UUN collections in critically ill patients receiving continuous nutrition support. ICU patients admitted from September 1999 through January 2003 who had UUN collections as part of routine care were recruited into the study. Patients were not receiving oral diets, were receiving continuous parenteral or enteral nutrition, and had indwelling urinary catheters. We excluded patients with hepatic or renal failure. Urine samples were collected every 6 hours starting at 6:00 AM and kept refrigerated until the 24-hour collection was complete. Samples were analyzed using an automated urease enzymatic reaction. Samples were multiplied by a factor of 4 (6-hour samples) or 2 (12-hour samples) to estimate 24-hour totals and then compared with actual 24-hour totals. Twenty-four patients (18 men) completed the study; 21 patients had 6-hour samples (84 samples), and 24 patients had 12-hour samples (24 samples). Estimated 24-hour UUN from 6-hour (14.7-15.7 g/d) and 12-hour (15.2 g/d) samples did not differ significantly (p > .5) from actual 24-hour totals (15.1 g/d). Shortened UUN collection times may be used to estimate 24-hour nitrogen losses in critically ill patients receiving continuous nutrition support. pubtype: Academic Journal doctype: research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
|---|