High-dose hook effect in six automated human chorionic gonadotrophin assays.

Abstract:

BACKGROUND:The high-dose hook effect is a well-known phenomenon of two-site immunoassays including those for human chorionic gonadotrophin (hCG). We investigated the occurrence of a high-dose hook effect in six routinely available hCG assays using a sample with a total hCG concentration of approximately 3,600,000 IU/L. METHOD:Dilutions of a sample with high hCG concentration were analysed using six common methods: Advia Centaur, Immulite 2000, Dimension RxL, Unicel DxI 800, Roche E170 and Abbott Architect. The measured concentrations and corresponding assay signals were obtained for each method. Performance was compared with manufacturer claims. RESULTS:Four of the tested platforms demonstrated a clear high-dose hook effect, while the other methods showed no hook effect at the highest level tested. CONCLUSION:Our results indicate that the hook effect may occur in some hCG assays, although the risk of reporting falsely low results was in most cases at higher concentrations than those indicated in manufacturers' product information. Assay design plays a major role in its occurrence. Laboratories should be aware of the assay limitations in this regard.

journal_name

Ann Clin Biochem

authors

Al-Mahdili HA,Jones GR

doi

10.1258/acb.2010.090304

subject

Has Abstract

pub_date

2010-07-01 00:00:00

pages

383-5

issue

Pt 4

eissn

0004-5632

issn

1758-1001

pii

acb.2010.090304

journal_volume

47

pub_type

杂志文章
  • Breast cancer-associated hypercalcaemia: a reassessment of renal calcium and phosphate handling.

    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

    pub_type: 杂志文章

    doi:10.1177/000456329002700605

    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

  • Correction and reporting of potassium results in haemolysed samples.

    abstract:BACKGROUND:Potassium is usually the most important analyte affected by in vitro haemolysis and the result obtained may falsely indicate or disguise a life-threatening abnormality and so give rise to inappropriate treatment. The purpose of the study was to provide a solution to the problem of reporting potassium on haem...

    journal_title:Annals of clinical biochemistry

    pub_type: 杂志文章

    doi:10.1258/0004563053492739

    authors: Dimeski G,Clague AE,Hickman PE

    更新日期:2005-03-01 00:00:00

  • Evaluation of the particle gel diffusion technique for the detection of haemoglobin S in Sudanese patients.

    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

    pub_type: 杂志文章

    doi:10.1258/acb.2008.008155

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

    更新日期:2009-03-01 00:00:00

  • The metabolic investigation of sudden infant death.

    abstract::Inherited metabolic disorders account for a small but significant number of sudden unexplained deaths in neonates, infants and occasionally older children. In particular, inherited disorders of fatty acid oxidation may closely mimic sudden infant death syndrome. Post-mortem investigations offer the final opportunity t...

    journal_title:Annals of clinical biochemistry

    pub_type: 杂志文章,评审

    doi:10.1258/0004563041201473

    authors: Olpin SE

    更新日期:2004-07-01 00:00:00

  • A novel five-microlitre capillary system for home glucose monitoring.

    abstract::Improvement in the control of diabetic patients is aided by a knowledge of blood glucose levels during a 'normal' (non-hospitalised) day. We have devised a 5 microliter capillary tube collection system as a 'kit' for home use by diabetics. Blood collected into 5 microliter capillary tubes is washed into a protein prec...

    journal_title:Annals of clinical biochemistry

    pub_type: 杂志文章

    doi:10.1177/000456328101800507

    authors: Williams CP,Davies GK,Child DF

    更新日期:1981-09-01 00:00:00

  • Prevalence of macroamylasaemia using polyethylene glycol precipitation as a screening method.

    abstract::Four hundred and fifty-four subjects with hyperamylasaemia were screened for the presence of macroamylase using polyethylene glycol precipitation (PEG) and the Beckman automated amylase assay based on the hydrolysis of maltotetraose. Twenty-five subjects (5.5%) exhibited PEG precipitation values suggestive of macroamy...

    journal_title:Annals of clinical biochemistry

    pub_type: 杂志文章

    doi:10.1258/0004563011900263

    authors: Lawson GJ

    更新日期:2001-01-01 00:00:00

  • Improved continuous-flow analysis for serum bilirubin.

    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

    pub_type: 杂志文章

    doi:10.1177/000456328001700509

    authors: Lolekha PH

    更新日期:1980-09-01 00:00:00

  • A simple, rapid and cheap radioimmunoassay for plasma digoxin.

    abstract::A radioimmoassay for digoxin is described which uses commercially available reagents. Two assay procedures are used, one for batch assays, and another, which needs a 5 minute incubation only, for 'stat' assays. The methods are shown to be simple, rapid, precise and inexpensive and the batch procedure compared well wit...

    journal_title:Annals of clinical biochemistry

    pub_type: 杂志文章

    doi:10.1177/000456328502200216

    authors: Moore RA,Turner M,Cousins J,Gales M

    更新日期:1985-03-01 00:00:00

  • Apolipoprotein A-I concentration in tears in diabetic retinopathy.

    abstract:BACKGROUND:Apolipoprotein concentrations in reflex tears from healthy and noninsulin-dependent diabetes mellitus (NIDDM) subjects were measured and correlated with the stage of diabetic retinopathy. METHODS AND RESULTS:The apolipoprotein A-I (apo A-I) concentrations in the tears from NIDDM patients with retinopathy we...

    journal_title:Annals of clinical biochemistry

    pub_type: 杂志文章

    doi:10.1258/0004563021901748

    authors: Kawai S,Nakajima T,Hokari S,Komoda T,Kawai K

    更新日期:2002-01-01 00:00:00

  • Measurement of copper, zinc and magnesium in serum and urine by DC plasma emission spectrometry.

    abstract::The application of a DC plasma emission spectrometer to the measurement of copper, zinc and magnesium in serum and urine is reported. Each assay requires only a simple dilution in 1% nitric acid. Comparisons with standard atomic absorption techniques showed good analytical agreement, especially for copper and magnesiu...

    journal_title:Annals of clinical biochemistry

    pub_type: 杂志文章

    doi:10.1177/000456328502200512

    authors: Roberts NB,Fairclough D,McLoughlin S,Taylor WH

    更新日期:1985-09-01 00:00:00

  • Cerebrospinal fluid biochemistry in the diagnosis of multiple sclerosis.

    abstract::The Poser criteria for diagnosing multiple sclerosis (MS) includes clinical, paraclinical and laboratory information. We studied the influence of cerebrospinal fluid (CSF) biochemistry results on the categorisation of patients with suspected MS. A retrospective study was made of 138 patients who had CSF samples sent o...

    journal_title:Annals of clinical biochemistry

    pub_type: 杂志文章

    doi:10.1177/000456329002700303

    authors: Ratnaike S,Kilpatrick T,Tress B,Davis S,Kilpatrick C,Byron K,Deam D

    更新日期:1990-05-01 00:00:00

  • Preparation of material to control precision of calcium selective electrodes.

    abstract::A simple procedure is described for the preparation of a stable precision quality control material for use in the measurement of level of ionised calcium in serum at or near the reference range. Repeat analyses on a Nova 2 ionised calcium analyser of serum pools stored at different temperatures over a period of three ...

    journal_title:Annals of clinical biochemistry

    pub_type: 杂志文章

    doi:10.1177/000456328101800211

    authors: Fyffe JA,Jenkins AS,Bolland CJ,Dryburgh FJ,Gardner MD

    更新日期:1981-03-01 00:00:00

  • Serum glycated lipoproteins in type II diabetic patients with and without complications.

    abstract::The extent of lipoprotein glycation was assessed in 82 patients diagnosed as diabetes mellitus type II. Glycated lipoprotein levels in serum were determined by agarose gel film electrophoresis in 48 non-diabetic control subjects, 56 diabetics with complications and 26 diabetics with no complications. All glycated lipo...

    journal_title:Annals of clinical biochemistry

    pub_type: 杂志文章

    doi:10.1177/000456329503200505

    authors: Yeğin A,Ozben T

    更新日期:1995-09-01 00:00:00

  • Bhattacharya: a new application for quality control.

    abstract::The Bhattacharya method and the 'average of normals' method for internal quality control were compared. Both are based on unselected patient test results. The Bhattacharya method is mostly used in clinical chemistry for calculation of reference intervals but could be modified for quality control procedures. Using the ...

    journal_title:Annals of clinical biochemistry

    pub_type: 杂志文章

    doi:10.1177/000456329102800413

    authors: Oosterhuis WP,Modderman TA,Dinkelaar RB,Zwinderman AH,van der Helm HJ

    更新日期:1991-07-01 00:00:00

  • Clinical relevance of serum amyloid A protein monitoring in urinary tract infections.

    abstract::We have evaluated the clinical relevance of monitoring acute phase proteins in severe urinary tract infection. Body temperature, white blood cell count, erythrocyte sedimentation rate, serum amyloid A protein (SAA), C-reactive protein (CRP), alpha-1-antichymotrypsin (ACT) and alpha-1-acid glycoprotein (AGP) were deter...

    journal_title:Annals of clinical biochemistry

    pub_type: 杂志文章

    doi:10.1177/000456329303000308

    authors: Casl MT,Sabljar-Matovinović M,Kovacević S,Pocanić D,Preden-Kereković V,Jagarinec N

    更新日期:1993-05-01 00:00:00

  • Biochemical investigation of foetal and neonatal thyroid function using the ACS-180SE analyser: clinical application.

    abstract::Despite sonographic detection of foetal goitre, uncertainty persists in the initial diagnosis of thyrotoxicosis and hypothyroidism. The aim of this study was to establish foetal and neonatal iodothyronine and thyrotrophin reference values for the ACS-180SE analyser. From 22 to 36 weeks of gestation, median foetal seru...

    journal_title:Annals of clinical biochemistry

    pub_type: 杂志文章

    doi:10.1177/000456320103800509

    authors: Guibourdenche J,Noël M,Chevenne D,Vuillard E,Voluménie JL,Polak M,Boissinot C,Porquet D,Luton D

    更新日期:2001-09-01 00:00:00

  • Intraindividual variation in serum thyroid hormones, parathyroid hormone and insulin-like growth factor-1.

    abstract:BACKGROUND:Biological variation of an analyte is an important determinant of its usefulness. Intraindividual variation in serum thyroid hormones, parathyroid hormone (PTH) and insulin-like growth factor-1 (IGF-1) in healthy subjects was determined in this study. METHODS:Blood samples were taken at weekly intervals for...

    journal_title:Annals of clinical biochemistry

    pub_type: 杂志文章

    doi:10.1258/acb.2007.007103

    authors: Ankrah-Tetteh T,Wijeratne S,Swaminathan R

    更新日期:2008-03-01 00:00:00

  • Interpreting indicators of iron status during an acute phase response--lessons from malaria and human immunodeficiency virus.

    abstract::Iron status is influenced by inflammation when the normal control of iron metabolism is reorganized by the primary mediators of the acute phase response, tumour necrosis factor-alpha and interleukin-1. The objective of this review is to show how indices of iron status, particularly haemoglobin, serum ferritin and solu...

    journal_title:Annals of clinical biochemistry

    pub_type: 杂志文章,评审

    doi:10.1258/acb.2007.007167

    authors: Northrop-Clewes CA

    更新日期:2008-01-01 00:00:00

  • Evaluation of two commercially available ELISA kits for the determination of melatonin concentrations in amniotic fluid throughout pregnancy.

    abstract::Background The aim of the present study is to evaluate the utility of extraction versus non-extraction-based commercial melatonin ELISA kits for determining the melatonin concentration in amniotic fluid obtained in early and late pregnancy. Methods Pregnancy duration less than 28 weeks was defined as early and from 28...

    journal_title:Annals of clinical biochemistry

    pub_type: 杂志文章

    doi:10.1177/0004563216645123

    authors: Bagci S,Altuntas Ö,Katzer D,Berg C,Willruth A,Reutter H,Bartmann P,Müller A,Zur B

    更新日期:2017-01-01 00:00:00

  • The costing of tests in a laboratory for clinical chemistry and haematology.

    abstract::The total cost of a haematology and clinical chemistry laboratory, including external and hospital costs, was studied in a district general hospital in The Netherlands. The main conclusion is that the number of samples analysed is the most important cost-setting factor, but that reduction in the number of requests doe...

    journal_title:Annals of clinical biochemistry

    pub_type: 杂志文章

    doi:10.1177/000456328402100206

    authors: Leijten JF,van der Geer F,Scholten MN,Goldschmidt HM

    更新日期:1984-03-01 00:00:00

  • Continuous glucose monitoring and haemoglobin A(1c).

    abstract:BACKGROUND:Measurement of HbA(1c) is the standard test for assessment of glycaemic control in diabetic subjects. Using new glucose sensing technology we re-evaluated the significance of HbA(1c) in terms of the aspects of the blood profile it measures in patients with diabetes. METHODS:In a group of 27 patients with ty...

    journal_title:Annals of clinical biochemistry

    pub_type: 杂志文章

    doi:10.1258/000456302320314557

    authors: Sharp P,Rainbow S

    更新日期:2002-09-01 00:00:00

  • Different effects on oestrogen binding sites and anti-oestrogenic action of danazol and progesterone.

    abstract::Rabbit uterus contains type I and II oestrogen binding sites in the cytosol, and nuclear fractions. Oestrogen-stimulated increase in uterine weight was inhibited by concurrent treatment with progesterone or danazol. Oestrogen-induced type I binding sites were decreased by progesterone and to a lesser extent by danazol...

    journal_title:Annals of clinical biochemistry

    pub_type: 杂志文章

    doi:10.1177/000456329102800309

    authors: Tamaya T,Wada K,Mori H,Imai A

    更新日期:1991-05-01 00:00:00

  • Plasma C1 inhibitor in malignant diseases: functional activity versus concentration.

    abstract::Plasma C1 inhibitor (C1-INH) was determined in 64 patients with different malignant diseases and in 58 healthy persons. C1-INH antigen concentration was measured by radial immunodiffusion (RID), whereas its functional activity was assayed with chromogenic substrate. Within-run and day-to-day precision of both methods ...

    journal_title:Annals of clinical biochemistry

    pub_type: 杂志文章

    doi:10.1177/000456329102800609

    authors: Starcević D,Jelić-Ivanović Z,Kalimanovska V

    更新日期:1991-11-01 00:00:00

  • A comparison of three methods for the estimation of capillary blood glucose in filter paper spots.

    abstract::A comparison has been made between three methods for measuring capillary blood glucose collected on filter paper, including a new method using a Beckman glucose analyser 2. The methods are suitable for use with capillary blood spots collected onto filter paper for monitoring the control of diabetic patients. Their acc...

    journal_title:Annals of clinical biochemistry

    pub_type: 杂志文章

    doi:10.1177/000456328201900105

    authors: Taylor RP,Pennock CA

    更新日期:1982-01-01 00:00:00

  • Effect of heat inactivation of HIV on specific serum proteins and tumour markers.

    abstract::The effect on the concentrations of specific serum proteins and tumour markers, of heat-treating samples at 56 degrees C for 30 min to inactivate HIV, was investigated. Statistically significant decreases, that may affect clinical decisions, were observed for alpha-1-antitrypsin, beta-2-microglobulin, IgE, fibrinogen,...

    journal_title:Annals of clinical biochemistry

    pub_type: 杂志文章

    doi:10.1177/000456329002700611

    authors: Gleeson M,Herd L,Burns C

    更新日期:1990-11-01 00:00:00

  • Evaluation of the diagnostic value of serum bile acid in the detection and functional assessment of liver diseases.

    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

    pub_type: 杂志文章

    doi:10.1177/000456328502200608

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

    更新日期:1985-11-01 00:00:00

  • The biochemical assessment of insulin resistance.

    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

    pub_type: 杂志文章,评审

    doi:10.1258/000456307780945778

    authors: Borai A,Livingstone C,Ferns GA

    更新日期:2007-07-01 00:00:00

  • Recurrent dizzy spells: all in the head!

    abstract::Hypoglycaemia is an uncommon manifestation of hypopituitarism in non-diabetic adults. A 47-year-old woman with Cushing's disease was treated with bilateral adrenalectomy and pituitary radiotherapy following unsuccessful trans-sphenoidal surgery. Twenty years later, she presented with a tonic-clonic seizure and recurre...

    journal_title:Annals of clinical biochemistry

    pub_type: 杂志文章

    doi:

    authors: McAulay V,Seckl JR,Strachan MW

    更新日期:2005-01-01 00:00:00

  • Identification of phosphotyrosyl proteins in vitreous humours of patients with vitreoretinal diseases by sodium dodecyl sulphate-polyacrylamide gel electrophoresis/Western blotting/matrix-assisted laser desorption time-of-flight mass spectrometry.

    abstract:BACKGROUND:It is important to explain target proteins for the understanding of the pathogenesis of vitreoretinal diseases. In a previous study, we identified more than 100 proteins including seven angiogenic-modulated factors in vitreous humours (VHs). Although there have been many reports of expressed protein profiles...

    journal_title:Annals of clinical biochemistry

    pub_type: 杂志文章

    doi:10.1258/acb.2007.007151

    authors: Mukai N,Nakanishi T,Shimizu A,Takubo T,Ikeda T

    更新日期:2008-05-01 00:00:00

  • Prognostic evaluation of serum long non-coding RNA H19 for endoscopic keyhole surgery or craniotomy in glioma.

    abstract:BACKGROUND:Our study aims to explore the effect of serum long non-coding RNA (lncRNA) H19 level on the long-term prognosis of endoscopic keyhole surgery or craniotomy for glioma. METHODS:A total of 264 glioma patients were selected. Patients were randomly divided into the Craniotomy-high H19 group, the Craniotomy-low ...

    journal_title:Annals of clinical biochemistry

    pub_type: 杂志文章

    doi:10.1177/0004563220941888

    authors: Shen L,Xu M,Wang Z,Yu Z

    更新日期:2020-09-01 00:00:00