A direct comparison of patient-based real-time quality control techniques: The importance of the analyte distribution.

abstract：:Background Analysis of dried blood specimens has been an integral part of laboratory medicine dating back to the early 1960s when they were introduced as part of neonatal screening programs. More recently, they have been used in Down syndrome screening programmes. Dried blood spot specimens can be collected either by ...

journal_title：Annals of clinical biochemistry

authors： Krantz DA,Carmichael JB

更新日期：2013-11-01 00:00:00

abstract：:The immunosuppressive agent mycophenolate mofetil is a prodrug for the active compound mycophenolic acid. Following organ transplantation, it is used mostly in combination with other immunosuppressive drugs, but it has also been used as primary therapy. Although in the pivotal clinical studies the drug was given in fi...

journal_title：Annals of clinical biochemistry

authors： Holt DW

更新日期：2002-05-01 00:00:00

abstract：:A rapid vacuum-driven procedure, using pre-treated Sep-Pak C18 cartridges, has been developed for the simultaneous extraction of arginine vasopressin (AVP) and atrial natriuretic peptide (ANP) from plasma. Non-specific interference was removed by fractional elution with an aqueous methanol/trifluoroacetic acid (TFA) m...

journal_title：Annals of clinical biochemistry

authors： Penney MD,Hampton D,Oleesky DA,Livingstone C,Mulkerrin E

更新日期：1992-11-01 00:00:00

abstract：BACKGROUND:Lysophosphatidic acid (LPA) plays important roles in a variety of biological responses, especially in the area of vascular biology, and the determination of its plasma concentration is believed to be important. Several mechanisms are known to be involved in the metabolism of LPA. METHODS:To identify factors...

journal_title：Annals of clinical biochemistry

authors： Hosogaya S,Yatomi Y,Nakamura K,Ohkawa R,Okubo S,Yokota H,Ohta M,Yamazaki H,Koike T,Ozaki Y

更新日期：2008-07-01 00:00:00

abstract：:Measurement of urinary free cortisol using the Bayer Automated Chemiluminescent System (ACS:180 PLUS) was evaluated and compared with an in-house extraction radioimmunoassay (RIA). Inter-assay coefficients of variation were acceptable, being respectively 5.3%, 4.8% and 3.8% at 141, 406 and 942 nmol/L (n=20) for the AC...

journal_title：Annals of clinical biochemistry

authors： Kennedy DM,Selby C,Lawson N

更新日期：2000-07-01 00:00:00

abstract：:γ-glutamyltransferase plays a key role in the synthesis and metabolism of extracellular glutathione, a major antioxidant in several defence mechanisms in the body. γ-glutamyltransferase is affected by environmental and genetic factors, and is raised when there is depletion of glutathione. Hence, it is a marker of oxid...

journal_title：Annals of clinical biochemistry

authors： Bulusu S,Sharma M

更新日期：2016-05-01 00:00:00

abstract：:Antibodies to glutamic acid decarboxylase (GAD) are a useful autoimmune marker for type 1 diabetes mellitus in Caucasians. We examined antibodies to GAD and their relationships with clinical features and pancreatic beta cell function in 140 young Chinese diabetic patients. Over an 18-month period beginning in 1995, 14...

journal_title：Annals of clinical biochemistry

authors： Ko GT,Chan JC,Yeung VT,Chow CC,Li JK,Lau MS,Mackay IR,Rowley MJ,Zimmet P,Cockram CS

更新日期：1998-11-01 00:00:00

abstract：:Immunoreactive melatonin has been studied in normal human volunteers, both men and women, at different times of day and different times of the year. At 2400, but not at 0800 or 1200, there are very large inter-individual variations in mean levels, the maximum difference being fivefold. Intra-individual variations are ...

journal_title：Annals of clinical biochemistry

authors： Arendt J,Wirz-Justice A,Bradtke J,Kornemark M

更新日期：1979-11-01 00:00:00

abstract：BACKGROUND:Extraction followed by liquid chromatography-tandem mass spectrometry (LC-MS/MS) analysis is the method of choice when it comes to the accurate quantification of 25-OH-vitamin D in blood samples. It is generally assumed that the addition of exogenous internal standard allows for the determination of the endo...

journal_title：Annals of clinical biochemistry

authors： Lankes U,Elder PA,Lewis JG,George P

更新日期：2015-01-01 00:00:00

abstract：BACKGROUND:Patients with mutations of succinate dehydrogenase B (SDHB) and succinate dehydrogenase D (SDHD) are at high risk of paraganglioma necessitating surveillance. Chromogranin A has been proposed as a biochemical marker of paraganglioma. We sought to determine the diagnostic utility of chromogranin A in a popula...

journal_title：Annals of clinical biochemistry

authors： Thompson MJ,Parameswaran V,Burgess JR

更新日期：2019-01-01 00:00:00

abstract：BACKGROUND:In the enzyme reaction for the determination of the unbound (free) bilirubin concentration by glucose oxidase and peroxidase, materials with low affinity for serum protein are reactive. The influence of these materials on the determination of serum unbound bilirubin was investigated. METHODS Serum samples fr...

journal_title：Annals of clinical biochemistry

authors： Itoh S,Kawada K,Kusaka T,Yasuda S,Okada H,Imai T,Isobe K

更新日期：2002-11-01 00:00:00

abstract：BACKGROUND:Recent NICE Guidelines have emphasized the need to have in place by 2007 the capability of offering screening to all women in the first trimester using a combination of maternal age with the ultrasound marker nuchal translucency thickness (NT) and the maternal serum biochemical markers free beta-hCG and preg...

journal_title：Annals of clinical biochemistry

authors： Spencer K

更新日期：2005-01-01 00:00:00

abstract：BACKGROUND:Abundant evidence indicate the increased levels of oxidative stress in patients with autism. Advanced glycation end products and advanced lipoxidation end products and their precursors play a major role in increased oxidative stress in numerous metabolic and neurologic diseases. Carnosine is a natural dipept...

journal_title：Annals of clinical biochemistry

authors： Ghodsi R,Kheirouri S,Nosrati R

更新日期：2019-01-01 00:00:00

abstract：:Protoporphyrin and zinc-protoporphyrin were measured in the erythrocytes of normal subjects, workers exposed to lead and patients with iron deficiency and erythropoietic protoporphyria (EPP). Results showed significantly higher levels of zinc-protoporphyrin in the lead-exposed workers (P < 0.0001), patients with iron ...

journal_title：Annals of clinical biochemistry

authors： Nelson JC,Westwood M,Allen KR,Newton KE,Barth JH

更新日期：1998-05-01 00:00:00

abstract：BACKGROUND:With the recent outbreak in West Africa, hospitals worldwide have been developing protocols for suspect of cases of Ebola virus disease. Patients with Ebola virus disease present with a severe gastroenteritis leading to dehydration and electrolyte abnormalities and as such, routine chemistry analysis is esse...

journal_title：Annals of clinical biochemistry

authors： LeBlanc JJ,Heinstein C,MacDonald J,Gallant R,Roberts C,Jackson C,Lou A,Nassar BA,Hatchette TF

更新日期：2016-03-01 00:00:00

abstract：:The calculation of within-laboratory imprecision in quality-assessment (QA) programmes normally involves combining data from different analyte concentrations to calculate an average standard deviation (SD) or coefficient of variation. However, for immunoassay neither of these parameters is concentration independent. T...

journal_title：Annals of clinical biochemistry

authors： Compton P,Cole B,Stuart M,Egan G

更新日期：1984-11-01 00:00:00

abstract：:Auto-antibodies to oxidized low-density lipoprotein (ox-LDL) are thought to play a pivotal role in the pathogenesis of atherosclerosis. This study investigates the value of auto-antibodies to ox-LDL as a predictive marker of atherosclerosis in patients with both homozygous and heterozygous familial hypercholesterolaem...

journal_title：Annals of clinical biochemistry

authors： Paiker JE,Raal FJ,von Arb M

更新日期：2000-03-01 00:00:00

abstract：:The mechanisms of hypercalcaemia were assessed in 20 hypercalcaemic patients with breast cancer. Abnormalities suggestive of a PTH-related peptide (PTHrP) mechanism were observed in up to 60% of cases; urinary cyclic adenosine monophosphate (UcAMP) was elevated in nine patients (45%), renal tubular reabsorption of cal...

journal_title：Annals of clinical biochemistry

authors： Gallacher SJ,Fraser WD,Patel U,Logue FC,Soukop M,Boyle IT,Ralston SH

更新日期：1990-11-01 00:00:00

abstract：:The diagnostic usefulness of fasting total serum bile acids (SBA/F) in the detection of liver diseases and assessment of different aspects of hepatic function alteration was evaluated in 61 healthy subjects and 186 patients with liver disease. The value of SBA/F was compared with other routine tests. In 49 healthy sub...

journal_title：Annals of clinical biochemistry

authors： Cravetto C,Molino G,Biondi AM,Cavanna A,Avagnina P,Frediani S

更新日期：1985-11-01 00:00:00

abstract：:We examined the reactivity of human serum albumin-bound bilirubin and its photoisomers as substrates for a direct bilirubin assay using bilirubin oxidase. The reduction of (EZ)-cyclobilirubin reached 100% 5 min after addition of the enzyme at any pH tested (3.5-7.4) in 0.1 mol/L phosphate buffer, whereas the reduction...

journal_title：Annals of clinical biochemistry

authors： Itoh S,Kusaka T,Imai T,Isobe K,Onishi S

更新日期：2000-07-01 00:00:00

abstract：:The higher bias of serum cystine estimations by a HPLC method compared with those by ion exchange techniques is shown to be largely due to differences in the sample preparation procedures of the two techniques. The ion exchange methods utilised sulphosalicylic acid serum protein precipitation and post-column ninhydrin...

journal_title：Annals of clinical biochemistry

authors： Cooper JD,Turnell DC,Green B,Wright DJ,Coombes EJ

更新日期：1988-09-01 00:00:00

abstract：BACKGROUND:Urinary excretion of the low molecular weight protein cystatin C is a marker of renal disorders and a good predictor of the severity of acute tubular necrosis. We evaluated the measurement of urinary cystatin C and determined its reference range. METHODS:Measurement of urinary cystatin C by particle-enhance...

journal_title：Annals of clinical biochemistry

authors： Herget-Rosenthal S,Feldkamp T,Volbracht L,Kribben A

更新日期：2004-03-01 00:00:00

abstract：BACKGROUND:Sickle cell disease is a heterogenous disorder characterized by an abnormal haemoglobin and sickling phenomena of red cells. It is prevalent among certain nomadic tribes in Sudan. Painful, aplastic and haemolytic crises mark sickle cell anaemia. Haemoglobin S (HbS) is detected using haemoglobin electrophores...

journal_title：Annals of clinical biochemistry

authors： Nimir AA,Khalil EA,Musa AM,Yassin HM,El-Hassan AM

更新日期：2009-03-01 00:00:00

abstract：:A sensitive immunochemiluminometric assay with a detection limit of 1.1 microU/L was developed for the measurement of urinary growth hormone (UGH). The assay was shown to be specific and precise. There was a good correlation between serum growth hormone (GH) and UGH concentrations in 20 patients with acromegaly and si...

journal_title：Annals of clinical biochemistry

authors： Turner G,Brown RC,Weeks I,Butler GE,Creagh FN,Woodhead JS

更新日期：1993-03-01 00:00:00

abstract：:Hereditary renal hypouricaemia (HRH) is a genetic disorder commonly associated with exercise-induced acute kidney injury (AKI). We report the case of a 19-year-old man who was admitted to hospital with exercise-induced AKI and who was subsequently shown to have HRH. We believe this to be the first description of a cas...

journal_title：Annals of clinical biochemistry

authors： Chakraborty S,Sural S

更新日期：2013-05-01 00:00:00

abstract：:We compared the diagnostic utility of recently proposed slope assays for serum creatine kinase and creatine kinase-2 with the optimized decision threshold assays. The former approach has been claimed to be superior to any other single diagnostic technique. We show, by ROC curve and likelihood ratio analyses, that the ...

journal_title：Annals of clinical biochemistry

authors： Leung FY,Griffith AP,Jablonsky G,Henderson AR

更新日期：1991-01-01 00:00:00

abstract：:A simple and improved method of continuous-flow analysis for total and direct bilirubin in serum is described. Advantages of the method are: small serum and reagent volumes; the use of less concentrated caffeine solution in the accelerator; the substitution of distilled water for hydrochloric acid in the direct biliru...

journal_title：Annals of clinical biochemistry

authors： Lolekha PH

更新日期：1980-09-01 00:00:00

abstract：BACKGROUND:The haptoglobin (Hp) 2-2 phenotype has been known to have less antioxidative activity than Hp 1-1 and Hp 2-1. However, few have reported the relationship between oxidative stress and Hp phenotypes by using oxidized LDL. The relationship between Hp phenotypes and oxidative stress was therefore investigated in...

journal_title：Annals of clinical biochemistry

authors： Lee YW,Min WK,Chun S,Lee W,Park H,Lee YK,Lee DH,Son JE

更新日期：2004-11-01 00:00:00

abstract：:Insulin resistance is a common condition, recognized to be a central feature of the metabolic syndrome, and strongly associated with an increased risk of cardiovascular disease and diabetes. The quantitative assessment of insulin sensitivity is not used for routine clinical purposes, but the emerging importance of ins...

journal_title：Annals of clinical biochemistry

authors： Borai A,Livingstone C,Ferns GA

更新日期：2007-07-01 00:00:00

abstract：:Two cases of hypercholesterolaemic patients are presented in whom raised plasma creatine kinase was noted during treatment with statins. The plasma creatine kinase failed to fall following cessation of therapy. Further investigation revealed the aetiology of the raised plasma creatine kinase to be due to previously un...

journal_title：Annals of clinical biochemistry

authors： Barth JH,Brownjohn AM,Jamieson DR

更新日期：2003-09-01 00:00:00