Abstract：
BACKGROUND:The gold standard test for the diagnosis of urinary tract infection is bacterial culture. However, urine cultures are labor intensive and costly. Furthermore, since results take 1-2 days many patients are treated presumptively prior to culture results being known. METHODS:We evaluated the Sysmex UF-1000i for the quantification of bacteria and white blood cells (WBCs) in urine in order to determine if it could be used to predict positive culture in comparison to the use of gram stain as a screening tool. RESULTS:The UF-1000i demonstrated good linearity, within and between run precision for bacterial and WBC quantification. Using ROC analysis, the AUC for predicting a positive culture (>10(5)cfu/mL) was 0.95 and 0.90 for bacteria and WBCs, respectively, with optimum cutoffs of 288.9 bacteria/μL and 31.8WBCs/μL, respectively. At these cutoffs, sensitivity (SE) and specificity (SP) for culture positivity were 0.93 and 0.86, respectively, for bacterial counts and 0.89 and 0.79, respectively, for WBC counts. The use of gender specific bacterial cutoffs improved performance, especially in males. In comparison, SE and SP of urine Gram stain were 0.94 and 0.68, respectively. CONCLUSIONS:Quantification of bacteria in unspun urine samples by the Sysmex UF-1000i can be used to screen urine samples for those likely to grow >10(5)cfu/mL. The Sysmex UF-1000i demonstrated increased SP over urine Gram stain, and in this study population could reduce unnecessary reflex urine cultures by 55%.
journal_name
Clin Biochemjournal_title
Clinical biochemistryauthors
Giesen CD,Greeno AM,Thompson KA,Patel R,Jenkins SM,Lieske JCdoi
10.1016/j.clinbiochem.2013.03.005subject
Has Abstractpub_date
2013-06-01 00:00:00pages
810-3issue
9eissn
0009-9120issn
1873-2933pii
S0009-9120(13)00098-2journal_volume
46pub_type
杂志文章abstract：OBJECTIVES:We investigated whether plasma visfatin and binding protein-4 (RBP-4) levels correlate with obesity and type 2 diabetes mellitus (T2DM). DESIGN AND METHODS:Two groups were enrolled: Group 1: 40 patients with T2DM and Group 2: 40 age- and gender-matched healthy controls. Both groups were subdivided according...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2011.08.1148
更新日期：2011-12-01 00:00:00
abstract：:Increased hemoglobin A1 (HbA1) occurs in diabetes mellitus as a direct consequence of hyperglycemia, which causes postsynthetic modification of hemoglobin proportional to blood glucose concentration. Glycosylation of hemoglobin is demonstrable also in vitro, not only by glucose, but with other reducing sugars such as ...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/s0009-9120(82)90556-2
更新日期：1982-06-01 00:00:00
abstract：OBJECTIVES:It has recently been suggested that when adjusting doses of cyclosporine (CsA), determining its concentration in blood samples taken 2 h postdose (C(2)) is more clinically beneficial than using the predose concentration (C(0)). We determined C(0) and C(2) concentrations of CsA and their metabolites in sample...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/s0009-9120(00)00147-8
更新日期：2000-07-01 00:00:00
abstract：:Preparation of (14C) Pro labeled protocollagen and requirements for its hydroxylation by PPH was investigated. Protocollagen can be prepared by centrifugation of the biological material at 15.000 X g. Substances in current use, viz catalase, bovine serum albumin and dithiothreitol were found unnecessary under the hydr...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/s0009-9120(76)80072-0
更新日期：1976-12-01 00:00:00
abstract：OBJECTIVES:This study has been conducted to develop a proper and relatively simple method for purification of three major forms of beta-hCG from urine to use as clinical calibrators and also to produce anti-beta-hCG polyclonal antibodies against these purified forms. DESIGN AND METHODS:Major beta-hCG forms from urine ...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2009.05.019
更新日期：2009-09-01 00:00:00
abstract：:Cyclosporine A (CsA) represents one of the more important therapeutic advances in the field of kidney transplantation. However, its effectiveness is limited by serious side effects, most notably nephrotoxicity. Investigation of the mechanisms of CsA-induced renal dysfunction has been hampered by the lack of a suitable...
journal_title：Clinical biochemistry
pub_type： 杂志文章,评审
doi：10.1016/0009-9120(91)90357-k
更新日期：1991-02-01 00:00:00
abstract：OBJECTIVES:To determine the impact of long distance rowing (160km, nonstop) on standard biological parameters and to study the relation between inflammation, myocardial necrosis, lipid profile, heart rate and energy expenditure. METHODS:Electrolytes, lipid profile, C-reactive protein (CRP), interleukin-6 (IL-6), tumor...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2017.11.018
更新日期：2018-02-01 00:00:00
abstract：:High-molecular-weight von Willebrand factor (vWf) multimers were separated from their smaller multimers by molecular-sieve chromatography and were measured by several sandwich enzyme-linked immunosorbent assays (ELISA) with monoclonal antibodies (moABs) against human vWf. The epitopes of these moABs were mapped partia...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/0009-9120(94)90022-1
更新日期：1994-04-01 00:00:00
abstract：BACKGROUND:In standard pre-analytical conditions, an isolation step is required for circulating tumor DNA (ctDNA) analysis. The need for this step remains unclear with the development of ultrasensitive detection technologies such as digital PCR (dPCR). The aim of our study was to evaluate the ctDNA detection by dPCR pl...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2017.06.005
更新日期：2017-11-01 00:00:00
abstract：:We report a sensitive and specific method for the determination of AY-25,712 concentrations in rat, dog and human serum by liquid chromatography with UV detection. The detection limit is 25 ng/mL, based on 2 mL of serum or plasma. The method has been validated in human volunteers receiving single oral doses of AY-25,7...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/s0009-9120(83)90112-1
更新日期：1983-08-01 00:00:00
abstract：OBJECTIVES:The objectives of this study were to compare the concentrations, size profiles and major tissue contributors of cell-free DNA (cfDNA) in plasma and in serum. DESIGN AND METHODS:Thirteen pregnant women in the third trimester were recruited for this study. We collected EDTA-plasma and serum samples using vari...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2016.09.009
更新日期：2016-12-01 00:00:00
abstract：:Biobanking is a new and very dynamic field. To achieve long term financial sustainability of biobank infrastructures we propose that a new focus is needed on activities, products and services provided by the biobank that relate to the external stakeholder: biobanking 3.0. Earlier stages of biobanking are biobanking 1....
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2013.12.018
更新日期：2014-03-01 00:00:00
abstract：OBJECTIVES:Patients with Ehlers-Danlos syndrome were described to contain reduced activities of beta4-galactosyltransferase-7 (beta4Gal-T7). Therefore, measurement of beta4Gal-T7 activity can help to characterize defects in proteoglycan biosynthesis in patients with connective tissue diseases. DESIGN AND METHODS:We de...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2008.12.009
更新日期：2009-04-01 00:00:00
abstract：OBJECTIVES:Despite the evidence that both homocysteine and cysteine are important risk factors for vascular disease and atherosclerosis no information are reported about their effective amount in plaque and on the relationship with the other low molecular weight thiols. DESIGN AND METHODS:We used capillary electrophor...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2009.02.007
更新日期：2009-06-01 00:00:00
abstract：OBJECTIVE:To characterize the lipid-related atherogenic risk factors in iron deficiency anaemia (IDA) patients. DESIGN AND METHODS:Twenty IDA women were compared to healthy age-matched controls. Lipoprotein profile, cholesteryl ester transfer protein (CETP), paraoxonase (PON) 1 and lipoprotein-associated phospholipase...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2009.10.003
更新日期：2010-03-01 00:00:00
abstract：OBJECTIVES:To investigate the association of parental hyperhomocysteinemia, C677T Methylene tetrahydrofolate reductase (MTHFR) polymorphism and DNA damage with recurrent pregnancy loss (RPL). DESIGN AND METHODS:A case-control study. Reverse phase HPLC, PCR-RFLP and Cytokinesis blocked micronuclei assay were used to as...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2008.12.003
更新日期：2009-03-01 00:00:00
abstract：BACKGROUND:The effectiveness of the URIT-2900 Hematology Analyzer for screening of hemoglobinopathies commonly found in Southeast Asian populations was examined. METHODS:Appropriate cut-off values of MCV and MCH for screening of α(0) and β thalassemias were derived from the receiver operator characteristic curve condu...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2011.04.009
更新日期：2011-07-01 00:00:00
abstract：OBJECTIVES:The new immunochemistry cobas e 801 module (Roche Diagnostics) was developed to meet increasing demands on routine laboratories to further improve testing efficiency, while maintaining high quality and reliable data. DESIGN AND METHODS:During a non-interventional multicenter evaluation study, the overall pe...
journal_title：Clinical biochemistry
pub_type： 杂志文章,多中心研究
doi：10.1016/j.clinbiochem.2018.05.019
更新日期：2018-08-01 00:00:00
abstract：:Our studies lead us to suggest that in order for an organic chemical to cause porphyrin accumulation in chick embryo hepatocyte culture, it must be: 1. lipophilic; 2. resistant to biotransformation by phase I or phase II reactions to compounds which are devoid of biological activity; and 3. capable of interacting with...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/s0009-9120(89)80073-6
更新日期：1989-06-01 00:00:00
abstract：:Iodine deficiency (ID) is associated with increased prevalence of goiter, increased risk for neurodevelopmental disorders, and is the world's leading cause of intellectual deficits. Iodine nutritional status of a population is assessed by measurements of urinary iodine concentrations which are also used to define, ind...
journal_title：Clinical biochemistry
pub_type： 杂志文章,评审
doi：10.1016/s0009-9120(02)00406-x
更新日期：2002-11-01 00:00:00
abstract：OBJECTIVES:The change in DNA methylation patterns can be used to distinguish between normal and cancer cells. The aim of the present study was to examine the 5' CpG island methylation patterns of the cancer-testis antigen (CT antigen) gene family, MAGE-As, in hepatocellular carcinoma (HCC), and to develop the DNA demet...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2006.01.014
更新日期：2006-03-01 00:00:00
abstract：:An automated biotin-streptavidin procedure for measuring progesterone in serum is described. The method is linear up to 98.3 nmol/L and the calibration curve is stable for at least 14 days. The lower limit of progesterone detection is 0.70 nmol/L. Although serum is the preferred specimen, progesterone levels can be me...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/0009-9120(92)90105-2
更新日期：1992-12-01 00:00:00
abstract：OBJECTIVES:Investigate the interference of Virox® disinfectant wipes containing hydrogen peroxide with Lifescan SureStep Flexx® glucose meter results. DESIGN AND METHODS:Glucose measurements of control and whole blood samples were performed before and after cleaning with Virox® wipes to reveal the kinetics of this int...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2010.09.012
更新日期：2010-12-01 00:00:00
abstract：BACKGROUND:Automatic photometric determination of the hemolysis index (HI) on serum and plasma samples is central to detect potential interferences of in vitro hemolysis on laboratory tests. When HI is above an established cut-off for interference, results may suffer from a significant bias and undermine clinical relia...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2018.01.009
更新日期：2018-07-01 00:00:00
abstract：:We describe a simple direct extraction method for the gas-liquid chromatography determination of serum valproic acid. The working range for the assay is 2-180 mg/L and our within-run precision was 5.8 and 4.3% at the 40 and 90 mg/L concentrations respectively. Hemolyzed and lipemic sera as well as samples from patient...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/s0009-9120(81)90772-4
更新日期：1981-04-01 00:00:00
abstract：AIMS:There is increasing interest in using fructosamine measurements in screening for or managing diabetes, yet uncertainty remains as to whether these measurements should be corrected for variation in serum protein concentrations. METHODS:We considered all sets of simultaneous measurements of fructosamine, albumin, t...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2016.10.014
更新日期：2017-02-01 00:00:00
abstract：OBJECTIVE:To identify independent predictors of serum butyrylcholinesterase (BuChE) activity and examine its relationship with the metabolic syndrome. DESIGN AND METHODS:Serum BuChE activity was measured and metabolic syndrome risk factors were assessed in 1097 healthy subjects recruited from the Newfoundland adult po...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2005.04.008
更新日期：2005-09-01 00:00:00
abstract：OBJECTIVES:To develop a method for the determination of succinylacetone (SA) in dried blood spots (DBS) using tandem mass spectrometry (MS/MS). METHODS:SA was extracted from DBS with an acetonitrile and water solution (80:20 by volume) containing formic acid and hydrazine hydrate (both at 0.1% by volume), and analyzed...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2004.07.006
更新日期：2004-11-01 00:00:00
abstract：:We describe a patient who received intravenous dimethyl sulphoxide (DMSO) (as part of an experimental protocol) to control increased intracranial pressure. The patient died of a brain abscess. She developed extreme serum hyperosmolality from the DMSO with the osmolality peaking at 717 mosmol/kg. DMSO may induce extrem...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/s0009-9120(83)90168-6
更新日期：1983-08-01 00:00:00
abstract：OBJECTIVES:We aimed to compare the individuality (within subject consistency) of plasma and urine betaine and N,N-dimethylglycine. DESIGN AND METHODS:In two separate groups of 8 males (ages 19 to 40), plasma (10) and urine (6) samples were collected either over a single day or over an 8 week period. The individuality ...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2009.02.001
更新日期：2009-05-01 00:00:00
