Cobbaert C.,Leiden University |
Weykamp C.,Beatrix Hospital |
Franck P.,Haga Hospital |
de Jonge R.,EMCR |
And 5 more authors.
Clinica Chimica Acta | Year: 2012
Background: Equivalence of results among laboratories is a major mission for medical laboratories. Monitoring of test equivalence is structurally integrated in the Dutch External Quality Assessment (EQA) scheme since 2005. Commutable poolsera, single donation "spy" sera and biological variance tolerance limits have been introduced in the EQA scheme for evaluation of the degree of test equivalence and its determinants. Methods: In the annual cycle scheme 24 samples, covering the (patho)physiological measuring range for 17 analytes, are assayed by 220 participating laboratories at biweekly intervals. Test equivalence was evaluated by calculating overall median interlaboratory coefficients of variation (CVs) and its bias and imprecision components. Data from 2005 and 2010 schemes are evaluated to investigate trends in performance and success of standardization efforts. Results: Overall median interlaboratory CVs in 2010 were mostly better than in 2005. Median interlaboratory CVs became <. 5% for electrolytes and substrates, and <. 10% for enzymes. Improvement in median interlaboratory CVs over these five years is mainly explained by improved method standardization, especially for enzymes and creatinine. Conclusion: The Dutch EQA-program proves to be a powerful instrument to evaluate test equivalence. It allows monitoring standardization efforts in a highly effective way and gives insight into remaining standardization potential. © 2012 Elsevier B.V.
De Jonge V.,Erasmus Medical Center |
Nicolaas J.S.,Erasmus Medical Center |
Van Baalen O.,Beatrix Hospital |
Brouwer J.T.,Reinier Of Graaf Hospital |
And 4 more authors.
American Journal of Gastroenterology | Year: 2012
OBJECTIVES: Colonoscopy is the gold standard for visualization of the colon. It is generally accepted as a safe procedure and major adverse events occur at a low rate. However, few data are available on structured assessment of (minor) post-procedural adverse events. METHODS: Consecutive outpatients undergoing colonoscopy were asked for permission to be called 30 days after their procedure. A standard telephone interview was developed to assess the occurrence of (i) major adverse events (hospital visit required), (ii) minor adverse events, and (iii) days missed from work. Adverse events were further categorized in definite-, possible-, and unrelated adverse events. Patients were contacted between January 2010 and September 2010. RESULTS: Out of a total of 1,528 patients who underwent colonoscopy and gave permission for a telephone call, 1,144 patients were contacted (response: 75%), 49% were male, the mean age was 59 years (s.d.: 14). Thirty-four patients (3%) reported major adverse events. These were definite-related in nine (1%) patients, possible-related in 6 (1%), and unrelated in 19 patients (2%). Minor adverse events were reported by 466 patients (41%). These were definite-related in 336 patients (29%), possible-related in 36 (3%), and unrelated in the remaining 94 patients (8%). Female gender (odds ratio (OR): 1.5), age <50 years (OR: 1.5), colonoscopy for colorectal cancer screening/surveillance (OR: 1.6), and fellow-endoscopy (OR: 1.7) were risk factors for the occurrence of any definite-related adverse event. Patients who reported definite-related adverse events were significantly less often willing to return for colonoscopy (81 vs. 88%, P<0.01) and were less often positive about the entire colonoscopy experience (84 vs. 89%, P=0.04). CONCLUSIONS: Structured assessment of post-colonoscopy adverse events shows that these are more common than generally reported. Close to one-third of patients report definite-related adverse events, which are major in close to 1 in 100 patients. The occurrence of adverse events does have an impact on the willingness to return for colonoscopy. © 2012 by the American College of Gastroenterology.
Oude Munnink B.B.,University of Amsterdam |
Canuti M.,University of Amsterdam |
Deijs M.,University of Amsterdam |
de Vries M.,Fungal Biodiversity Center |
And 9 more authors.
BMC Infectious Diseases | Year: 2014
Background: Gastrointestinal symptoms, in particular diarrhoea, are common in non-treated HIV-1 infected individuals. Although various enteric pathogens have been implicated, the aetiology of diarrhoea remains unexplained in a large proportion of HIV-1 infected patients. Our aim is to identify the cause of diarrhoea for patients that remain negative in routine diagnostics.Methods: In this study stool samples of 196 HIV-1 infected persons, including 29 persons with diarrhoea, were examined for enteropathogens and HIV-1. A search for unknown and unexpected viruses was performed using virus discovery cDNA-AFLP combined with Roche-454 sequencing (VIDISCA-454).Results: HIV-1 RNA was detected in stool of 19 patients with diarrhoea (66%) compared to 75 patients (45%) without diarrhoea. In 19 of the 29 diarrhoea cases a known enteropathogen could be identified (66%). Next to these known causative agents, a range of recently identified viruses was identified via VIDISCA-454: cosavirus, Aichi virus, human gyrovirus, and non-A non-B hepatitis virus. Moreover, a novel virus was detected which was named immunodeficiency-associated stool virus (IASvirus). However, PCR based screening for these viruses showed that none of these novel viruses was associated with diarrhoea. Notably, among the 34% enteropathogen-negative cases, HIV-1 RNA shedding in stool was more frequently observed (80%) compared to enteropathogen-positive cases (47%), indicating that HIV-1 itself is the most likely candidate to be involved in diarrhoea.Conclusion: Unexplained diarrhoea in HIV-1 infected patients is probably not caused by recently described or previously unknown pathogens, but it is more likely that HIV-1 itself plays a role in intestinal mucosal abnormalities which leads to diarrhoea. © 2014 Oude Munnink et al.; licensee BioMed Central Ltd.
Kusters M.A.,Robert Bosch GmbH |
Jol-Van Der Zijde C.M.,Leiden University |
Van Tol M.J.,Leiden University |
Bolz W.E.,Elkerliek Hospital |
And 3 more authors.
Pediatric Infectious Disease Journal | Year: 2011
Down syndrome children show a decreased avidity of the antibody response after tetanus toxoid booster vaccination at 9 years of age suggesting impaired memory B cell selection in the germinal center. Clinicians need to be aware of this ongoing subtle immunologic deficit in Down syndrome. © 2011 Lippincott Williams & Wilkins.
PubMed | Swedish Defence Research Agency, TNO, Beatrix Hospital, Health Diagnostic Laboratory and Public Health Service Zuid Holland Zuid
Type: Journal Article | Journal: Standards in genomic sciences | Year: 2014
Francisella tularensis is a facultative intracellular bacterium in the class Gammaproteobacteria. This strain is of interest because it is the etiologic agent of tularemia and a highly virulent category A biothreat agent. Here we describe the draft genome sequence and annotation of Francisella tularensis subsp. holarctica BD11-00177, isolated from the first case of indigenous tularemia detected in The Netherlands since 1953. Whole genome DNA sequence analysis assigned this isolate to the genomic group B.FTNF002-00, which previously has been exclusively reported from Spain, France, Italy, Switzerland and Germany. Automatic annotation of the 1,813,372 bp draft genome revealed 2,103 protein-coding and 46 RNA genes.
Westermann E.J.A.,University Utrecht |
Jans M.,Beatrix Hospital |
Gaytant M.A.,University Utrecht |
Bach J.R.,Rutgers University |
Kampelmacher M.J.,University Utrecht
Jornal Brasileiro de Pneumologia | Year: 2013
Lung volume recruitment involves deep inflation techniques to achieve maximum insufflation capacity in patients with respiratory muscle weakness, in order to increase peak cough flow, thus helping to maintain airway patency and improve ventilation. One of these techniques is air stacking, in which a manual resuscitator is used in order to inflate the lungs. Although intrathoracic pressures can rise considerably, there have been no reports of respiratory complications due to air stacking. However, reaching maximum insufflation capacity is not recommended in patients with known structural abnormalities of the lungs or chronic obstructive airway disease. We report the case of a 72-year-old woman who had poliomyelitis as a child, developed torsion scoliosis and post-polio syndrome, and had periodic but infrequent asthma attacks. After performing air stacking for 3 years, the patient suddenly developed a pneumothorax, indicating that this technique should be used with caution or not at all in patients with a known pulmonary pathology.
Sint Nicolaas J.,Erasmus Medical Center |
De Jonge V.,Erasmus Medical Center |
Van Baalen O.,Beatrix Hospital |
Kubben F.J.G.M.,Maasstad Hospital |
And 4 more authors.
Endoscopy | Year: 2013
Background and study aims: The assessment of indications for follow-up colonoscopy may help to improve the allocation of available endoscopy resources. The aim of this study was to assess the timing of early follow-up colonoscopy and surveillance utilization in relation to adenoma detection rate (ADR) at follow-up. Methods: An assessment of the timing and yield of follow-up colonoscopies was performed in patients with non-inflammatory bowel disease (IBD) in a Dutch multicenter study. The primary outcome was the number of patients with a prior (index) colonoscopy. The necessity for follow-up procedures was assessed using the ADR. Results: Of 4800 consecutive patients undergoing a colonoscopy, 1249 non-IBD patients had undergone an index colonoscopy. Of these, follow-up procedures were performed within 1 year in 27 % (331/1249). Excluding incomplete colonoscopy, incomplete polypectomy, or poor bowel preparation on index, the ADR on early follow-up was 4 % for symptomatic and 26 % for asymptomatic patients. Among the asymptomatic patients with a follow-up colonoscopy at > 1 year (n = 463), an ADR of 23 % (108/463) was found. In 27 % of these patients, the observed surveillance intervals were in accordance with American Gastroenterological Association (AGA) surveillance recommendations; 60 % were classified as over-utilization and 13 % as under-utilization according to the AGA. Optimal utilization follow-up colonoscopies had higher ADRs on follow-up compared with over-utilized procedures (31 % vs. 17 %; P < 0.001). Conclusions: Follow-up colonoscopy in symptomatic patients within a year has limited value in terms of adenoma detection. A considerable proportion of surveillance colonoscopies are performed too early according to current guidelines, resulting in low detection rates. Both aspects can be targeted for optimal usage in endoscopic capacity. © Georg Thieme Verlag KG · Stuttgart · New York.
Krijnen J.L.M.,Laboratory of Pathology |
Fleischeur R.E.M.,Elisabeth Hospital |
Van Berkel M.,Beatrix Hospital |
Westenend P.J.,Laboratory of Pathology
Clinical Neuropathology | Year: 2010
Oligodendroglioma is a tumor of the central nervous system which rarely metastasizes. The diagnosis of oligodendroglioma is based on histomorphology with limited use of immunohistochemistry. However, recently a specific 1p/19q codeletion has been found which can be demonstrated by in situ hybridization. We report a case of a 58-years-old man with a 31-months history of oligodendroglioma presenting with fatigue and anemia. A bone marrow biopsy demonstrated massive localization of oligodendroglioma which was confirmed by in situ hybridization for the 1p/19q deletion. In addition we studied data from PALGA, the nationwide network and registry of histo- and cytopathology in the Netherlands and found an incidence of approximately 2 in 1000 for metastasis of oligodendroglioma outside the central nervous system. ©2010 Dustri-Verlag Dr. K. Feistle.
PubMed | St Antonius Hospital and Beatrix Hospital
Type: Journal Article | Journal: Surgical and radiologic anatomy : SRA | Year: 2016
We present a patient with a recurrent precaval left renal artery, stemming from a right-sided common trunk renal artery. The patient was a 44-year male who presented with a post-traumatic grade IV renal injury. After 3months without renal function improvement and repeated urinary tract infection, a laparoscopic nephrectomy of the affected right kidney was performed, without upfront identification of the vascular variation, resultingin ischemia of the remaining left kidney. An anastomosis of the common renal trunk and the distal left renal artery was created in between the abdominal aorta and the inferior vena cava. This case describes the importance of upfront detection of renal vascular variations using the appropriate imaging techniques.
Stouten K.,Albert Schweitzer Hospital |
van de Werken M.,Albert Schweitzer Hospital |
Tchetverikov I.,Albert Schweitzer Hospital |
Saboerali M.,Beatrix Hospital |
And 3 more authors.
Annals of Clinical Biochemistry | Year: 2014
Measurement of serum angiotensin-converting enzyme (ACE) activity can be helpful in the diagnosis and disease monitoring of sarcoidosis. Elevated serum ACE activity is found in 60-70% of sarcoidosis patients. Usually, the ACE activity is mildly increased (<3-fold the upper limit of the reference range) in sarcoidosis patients. Extremely elevated ACE activity is suggestive of the benign condition known as 'familial hyperactivity of ACE'. Familial hyperactivity of ACE is a relatively rare condition and can be confirmed by genetic testing. Considering a genetic cause of strongly elevated serum ACE activity is important to prevent possible overdiagnostics. Here, we highlight the factors that may complicate the interpretation of serum ACE activity measurements, and we present two cases that illustrate the importance of interdisciplinary consultation when extremely elevated serum ACE activity is measured. © The Author(s) 2013 Reprints and permissions:.sagepub.co.uk/journalsPermissions.nav.