Abstract:
BACKGROUND:The Schwartz 2009 creatinine-based revised formula is the only pediatric GFR estimating formula, which is compatible with the recent global creatinine standardization. This formula is only applicable if enzymatic creatinine methods are used. We propose an equation, taking into account the relative bias caused by serum proteins to use Jaffe based creatinine data for GFR estimation. METHODS:In a cohort study of 100 pediatric patients, serum creatinine was measured using a kinetic rate-blanked Jaffe assay (modified kinetic alkaline picrate method), a kinetic rate-blanked Jaffe compensated assay for reactive proteins and an enzymatic assay (creatinine plus method). Serum total protein, albumin, urea, uric acid and total bilirubin were measured with the use of commercial agents. RESULTS:The difference in serum creatinine between the enzymatic method and the compensated Jaffe method was mainly dependent on the total protein concentration in serum (r(2)=0.61, p<0.001). After applying the proposed protein correction, corrected compensated Jaffe results and creatinine clearance values became interchangeable with enzymatic serum creatinine results (r(2)=0.99, p<0.001; Deming regression: slope: 0.9787, intercept: -0.351) and with the newly proposed Schwartz formula, respectively (r(2)=0.99, p<0.001; Deming regression: slope 1.004, intercept: 2.16). CONCLUSIONS:In this study, we demonstrated the usability of the alkaline picrate method in the Schwartz formula, taking into account the relative bias caused by serum proteins.
journal_name
Clin Chem Lab Medjournal_title
Clinical chemistry and laboratory medicineauthors
Speeckaert MM,Wuyts B,Stove V,Walle JV,Delanghe JRdoi
10.1515/cclm-2012-0033subject
Has Abstractpub_date
2012-03-09 00:00:00pages
1597-600issue
9eissn
1434-6621issn
1437-4331pii
/j/cclm.2012.50.issue-9/cclm-2012-0033/cclm-2012-0journal_volume
50pub_type
杂志文章abstract::Since serum and plasma D-dimer concentrations correlate very well, we evaluated the comparability of other haemostasis activation markers in plasma and serum. Prothrombin fragment F1+2, fibrin monomer and D-dimer concentrations were measured with commercially available immunoassays in serum and plasma. Serum to plasma...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/CCLM.2001.101
更新日期:2001-07-01 00:00:00
abstract:BACKGROUND:Adiponectin is a cytokine produced by adipose tissue with insulin sensitising and anti-atherosclerotic effects. Low plasma adiponectin levels are used as a marker of the metabolic syndrome and incipient type 2 diabetes. METHODS:We carried out a series of studies to determine the short- and long-term variabi...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/CCLM.2006.227
更新日期:2006-01-01 00:00:00
abstract::A questionnaire to assess knowledge of the expected elevation in serum K measurement with different grades of hemolysis was administered to medical technologists working in biochemistry laboratories, hospital physicians and nurses. The questions involved different grades of hemolysis (mild, 1.0, moderate, 2.5 and seve...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/CCLM.2005.037
更新日期:2005-01-01 00:00:00
abstract::The mutant of CYP2D6*3 allele with A2637 deletion in exon 5 and the mutant of CYP2D6*4 allele G1934-->A, splice site defect are among the most common polymorphic alleles of CYP2D6 gene, resulting in a decreased or no activity of CYP isoenzyme. In this study, a reliable polymerase chain reaction-restriction fragment le...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/CCLM.1998.116
更新日期:1998-08-01 00:00:00
abstract:BACKGROUND:Sequencing based mutation screening assays of genes encompassing large numbers of exons could be substantially optimized by multiplex PCR, which enables simultaneous amplification of many targets in one reaction. In the present study, a multiplex PCR protocol originally developed for fragment analysis was ev...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/CCLM.2009.012
更新日期:2009-01-01 00:00:00
abstract::Cryoglobulins are proteins that precipitate at temperatures below 37 degrees C. Cold-induced precipitation of proteins may occur in vivo secondary to several important diseases, and lead to pathological manifestations involving different organs. Cryoprecipitation may be observed in vitro by exposing serum samples, sup...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/CCLM.2003.025
更新日期:2003-02-01 00:00:00
abstract:BACKGROUND:POEMS syndrome is defined by Polyneuropathy, Organomegaly, Endocrinopathy, Monoclonal gammopathy and Skin changes. The vascular endothelial growth factor (VEGF) appears to play a key role in the pathogenesis of the syndrome, and its concentrations are deemed to correlate to disease activity. The aim of the p...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/cclm-2015-0910
更新日期:2016-06-01 00:00:00
abstract::Brain natriuretic peptide is proposed as a biochemical marker which could provide a useful screening test to select patients for further cardiac investigations in heart failure. The applicability of such a biochemical test in clinics, hospital wards, and clinical laboratories is dependent on its ease of use and on the...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/CCLM.2000.076
更新日期:2000-06-01 00:00:00
abstract::Modifications in lipoprotein lipase levels lead to elevated triglycerides and reduced high density lipoprotein (HDL), both of which are risk factors for coronary artery disease (CAD). Hence, we examined the influence of the -93T/G, D9N, N291S, and S447X polymorphisms in the lipoprotein lipase (LPL) gene on CAD risk an...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/CCLM.2003.082
更新日期:2003-04-01 00:00:00
abstract::Background Aberrant kallikrein activity is observed in a number of inflammatory dermatoses. Up-regulation of kallikrein-5 (KLK5) activity leads to uncontrolled skin desquamation and cleavage of proteinase-activated receptor-2 (PAR2), causing the release of pro-inflammatory cytokines and disruption of epidermal barrier...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/cclm-2019-0123
更新日期:2019-10-25 00:00:00
abstract:BACKGROUND:When performed erroneously, the venous blood specimen collection (VBSC) practice steps patient identification, test request management and test tube labeling are at high risk to jeopardize patient safety. VBSC educational programs with the intention to minimize risk of harm to patients are therefore needed. ...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/cclm-2018-0051
更新日期:2018-10-25 00:00:00
abstract:BACKGROUND:Exosomes are cytoplasm containing vesicles released by many cells that can be found in several biological fluids including urine. Urinary exosomes are released from every segment of the nephron, are detectable in urine, constitutively contain RNA (small RNAs and mRNAs) and harbor unique subset of proteins, r...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/cclm-2013-0562
更新日期:2014-03-01 00:00:00
abstract:BACKGROUND:Ebola virus, an enveloped virus, is the cause of the largest and most complex Ebola virus disease (EVD) outbreak in West Africa. Blood or body fluids of an infected person may represent a biohazard to laboratory workers. Laboratory tests of virus containing specimens should be conducted in referral centres a...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/cclm-2015-0119
更新日期:2015-11-01 00:00:00
abstract::Background Patients with cystic fibrosis (CF) have a reduced intestinal absorption of cholesterol and in a preliminary study we observed differences in plasma sterol profile between patients with pancreatic sufficiency (PS) and those with pancreatic insufficiency (PI). Therefore, we hypothesized that the sterol analys...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/cclm-2019-1112
更新日期:2020-09-25 00:00:00
abstract:BACKGROUND:Several drugs may affect the diagnosis of brain death by depressing the electroencephalographic signal. Serum levels of these drugs must be below their respective therapeutic ranges. METHODS:A high performance liquid chromatography-based fast and simple method was developed for determination of thiopentone,...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/CCLM.2008.335
更新日期:2008-01-01 00:00:00
abstract:BACKGROUND:Autoantibodies against β1-adrenergic receptors (β1AR) that stimulate cardiac cAMP-production play a causal role in the pathogenesis of human heart failure. Patients can be subjected to specific therapies, if the presence of potentially cardio-noxious β1AR-autoantibodies is reliably diagnosed. This requires a...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/cclm-2015-0603
更新日期:2016-04-01 00:00:00
abstract:BACKGROUND:Interleukins, interferons and oxidative DNA products are important biomarkers assessing the inflammations and tissue damages caused by toxic materials in the body. We tried to evaluate distributions, reference values and age related changes of blood levels of inflammatory cytokines, C-reactive protein (CRP),...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/cclm-2012-0330
更新日期:2013-02-01 00:00:00
abstract:BACKGROUND:Inflammation plays an imperative role in the etiology of cardiovascular diseases (CVD). The role of cytokines in the development and progression of idiopathic dilated cardiomyopathy (IDCM) is still uncertain. The current study was conducted to evaluate the association of tumor necrosis factor-α (TNF-α) -238G...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章,meta分析
doi:10.1515/cclm-2014-0502
更新日期:2015-02-01 00:00:00
abstract::Removal of low molecular weight proteins from plasma by kidneys depends on glomerular filtration rate (GFR), protein-glomerular membrane electric charge, steric interactions and a number of functionally active nephrons present in the kidneys. There is a well documented relationship between the concentration of low mol...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/CCLM.2004.051
更新日期:2004-03-01 00:00:00
abstract:BACKGROUND:Urinary enzymes, including the brush border enzyme alanine aminopeptidase (AAP), are reliable biomarkers of nephrotoxicity and represent early indicators of tubular damage. The aim of the present study was to develop and validate an automated urinary AAP activity assay. METHODS AND RESULTS:For this purpose,...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/CCLM.2008.103
更新日期:2008-01-01 00:00:00
abstract:BACKGROUND:CD4+CD25+ forkhead box P3 (FOXP3)+ regulatory T cells (Tregs) accumulate in malignant tumors and negatively regulate antitumor immunity. However, the clinical significance of Tregs in HCC remains unclear. To determine the prognostic value of Tregs, we conducted a retrospective study on 264 patients with Barc...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/cclm-2013-0878
更新日期:2014-09-01 00:00:00
abstract::Prolidases I and II were highly purified from human erythrocytes. The effects of various amino acids, MnCl2 and mercaptoethanol, on these two enzymes were investigated. Normal prolidase II was very labile in the absence of MnCl2 or mercaptoethanol. The activity of prolidase II was maintained at about 76% by pre-incuba...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/CCLM.2003.202
更新日期:2003-10-01 00:00:00
abstract::Serum concentration of carbohydrate 19-9 antigen (CA 19-9), a sensitive marker of pancreatic cancer and cholangiocarcinoma, increases in a variety of liver diseases due to higher production and release by bile duct cells. Biliary epithelial cells are primarily affected in liver disease associated with cystic fibrosis ...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/CCLM.2003.050
更新日期:2003-03-01 00:00:00
abstract:BACKGROUND:Anti-cyclic citrullinated peptide (CCP) antibody is emerging as an important diagnostic marker for rheumatoid arthritis (RA). We evaluated the analytical and diagnostic performance of the ARCHITECT anti-CCP (Abbott Diagnostics), a new fully automated chemiluminescent microparticle immunoassay. METHODS:Serum...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/CCLM.2010.046
更新日期:2010-02-01 00:00:00
abstract::The clinical usefulness of C-reactive protein (CRP) and of transthyretin (TTR) for the early diagnosis and follow-up of infection after an open fracture was prospectively investigated (cohort A). It was complemented by a retrospective study of trauma patients admitted to an intensive care unit (cohort B). Serial deter...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/CCLM.2002.230
更新日期:2002-12-01 00:00:00
abstract::Background Intravascular hemolysis and in vitro hemolysis are prevalent contributors to failed blood sample analysis in the routine hospital laboratory. Interferences by hemoglobin in spectrophotometric and certain enzyme activity assays is the major causative factor. Methods By exploiting the hemoglobin-binding prope...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/cclm-2019-0381
更新日期:2019-10-25 00:00:00
abstract:BACKGROUND:We assessed whether glycated albumin (GA) is a useful glycemic indicator in diabetic patients with anemia who did not undergo dialysis. METHODS:Hemoglobin A(1c) (HbA(1c)) and GA were simultaneously measured in 370 diabetic subjects who had not undergone dialysis. The relationship between GA and HbA(1c) was ...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/CCLM.2011.646
更新日期:2011-10-01 00:00:00
abstract:BACKGROUND:High-dose biotin therapy is beneficial in progressive multiple sclerosis (MS) and is expected to be adopted by a large number of patients. Biotin therapy leads to analytical interference in many immunoassays that utilize streptavidin-biotin capture techniques, yielding skewed results that can mimic various e...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/cclm-2016-1183
更新日期:2017-05-01 00:00:00
abstract::Total prostate-specific antigen (PSA) and complexed PSA were determined in venous blood from 12 patients with prostate cancer before and after radical prostatectomy by using Immuno 1 PSA assays. The elimination kinetics of complexed PSA were compared with that of total PSA. Nearly constant concentrations of complexed ...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/CCLM.2000.044
更新日期:2000-04-01 00:00:00
abstract::The aim of the study was to investigate whether procalcitonin, soluble CD14 and interleukin-6 show advantages in predicting the outcome and specificity for bacterial infection in patients with sepsis in comparison to common C-reactive protein measurement. Laboratory parameters were measured in plasma of patients durin...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/CCLM.2000.007
更新日期:2000-01-01 00:00:00