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Apeldoorn, Netherlands

Den Uil C.A.,Erasmus Medical Center | Van Der Ent M.,Erasmus Medical Center | Jewbali L.S.D.,Erasmus Medical Center | Cheng J.M.,Erasmus Medical Center | And 2 more authors.
European Heart Journal | Year: 2010

Aims We investigated the relationship between sublingual perfused capillary density (PCD) as a measure of tissue perfusion and outcome (i.e. occurrence of organ failure and mortality) in patients with cardiogenic shock from acute myocardial infarction. Methods and results We performed a prospective study in 68 patients. Using Sidestream Dark Field imaging, PCD was measured after hospital admission (T0, baseline) and 24 h later (T1). We compared patients with baseline PCD ≤ median to patients with baseline PCD > median. Sequential organ failure assessment (SOFA) scores were calculated at both time points. The Kaplan-Meier 30-day survival analyses were performed and predictors of 30-day mortality were identified. The baseline PCD was a predictor of the change in the SOFA score between T0 and T1 (SOFA; ρ = -0.25, P = 0.04). Organ failure recovered more frequently in patients with PCD > median (>10.3 mm mm -2; n = 33) than in patients with PCD ≤ median (n = 35; 52 vs. 29, P < 0.05). Twenty-two patients (32) died: 17 patients (49) with PCD ≤ median vs. 5 patients (15) with PCD > median (P = 0.004). After adjustment, the cardiac power index [odds ratio (OR): 0.48, 95 CI: 0.24-0.94) and PCD (OR: 0.65, 95 CI: 0.45-0.92) remained significant predictors of 30-day outcome. Patients with baseline sublingual PCD ≤ median that improved at T1 had a considerable better prognosis relative to patients who had a persistently low PCD. Conclusion Diminished sublingual PCD, at baseline or following treatment, is associated with development of multi-organ failure and is a predictor of poor outcome in patients with acute myocardial infarction complicated by cardiogenic shock. © 2010 The Author. Source


Leeuwenburgh M.M.N.,University of Amsterdam | Wiarda B.M.,Alkmaar Medical Center | Wiezer M.J.,Sint. Antonius Hospital | Vrouenraets B.C.,Sint Lucas Andreas Hospital | And 6 more authors.
Radiology | Year: 2013

Purpose: To compare the diagnostic performance of imaging strategies with magnetic resonance (MR) imaging and computed tomographic (CT) imaging in adult patients suspected of having appendicitis. Materials and Methods: Institutional review board approval was obtained prior to study initiation, and patients gave written informed consent. In a multicenter diagnostic performance study, adults suspected of having appendicitis were prospectively identified in the emergency department. Consenting patients underwent ultrasonography (US) and subsequent contrast-enhanced CT if US imaging yielded negative or inconclusive results. Additionally, all patients underwent unenhanced MR imaging, with the reader blinded to other findings. An expert panel assigned final diagnosis after 3 months. Diagnostic performance of three imaging strategies was evaluated: conditional CT after US, conditional MR imaging after US, and immediate MR imaging. Sensitivity and specificity were calculated by comparing findings with final diagnosis. Results: Between March and September 2010, 229 US, 115 CT, and 223 MR examinations were performed in 230 patients (median age, 35 years; 40% men). Appendicitis was the final diagnosis in 118 cases. Conditional and immediate MR imaging had sensitivity and specificity comparable to that of conditional CT, which resulted in 3% (three of 118; 95% confidence interval [CI]: 1%, 7%) missed appendicitis, and 8% (10 of 125; 95% CI: 4%, 14%) false-positives. Conditional MR missed appendicitis in 2% (two of 118; 95% CI: 0%, 6%) and generated 10% (13 of 129; 95% CI: 6%, 16%) false-positives. Immediate MR missed 3% (four of 117; 95% CI: 1%, 8%) appendicitis with 6% (seven of 120; 95% CI: 3%, 12%) false-positives. Conditional strategies resulted in more false-positives in women than in men (conditional CT, 17% vs 0%; P = .03; conditional MR, 19% vs 1%; P = .04), wherease immediate MR imaging did not. Conclusion: The accuracy of conditional or immediate MR imaging was similar to that of conditional CT in patients suspected of having appendicitis, which implied that strategies with MR imaging may replace conditional CT for appendicitis detection. © RSNA, 2013. Source


Schaapveld M.,Comprehensive Cancer Center Amsterdam | Schaapveld M.,Netherlands Cancer Institute | Visser O.,Comprehensive Cancer Center Amsterdam | Siesling S.,Comprehensive Cancer Center North East | And 3 more authors.
European Journal of Cancer | Year: 2010

This study assesses whether new treatment strategies developed in clinical trials translate into improved survival for multiple myeloma (MM) patients in the Netherlands. All patients diagnosed with MM in the Northern part of the Netherlands between 1989 and 2005 were retrieved from two regional population-based cancer registries. Information on study participation was derived from linkage with trial information systems. The effect of period of diagnosis (1989-1992, 1993-1996, 1997-2000, 2001-2005), age (<50, 50-65, 66-74, ≥75), gender, Salmon-Durie (SD) stage, trial participation and treatment on relative survival were studied. In total 4985 patients were included. When trial participation was analysed for exact periods in which trials were open, 16% of patients aged ≤65 years with SD-stage I and 38% with SD-stage II or III were enrolled compared to 2% of patients aged >65 years with SD-stage I and 5% with SD-stage II or III. Relative survival decreased with age (p < .001), with advanced stage (p < .001) and was better for patients enrolled in trials (p < .001). Five-year relative survival increased from 34% (95% confidence interval (95% CI) 28-39%) in 1989-1992 to 56% (95% CI 50-61%) in 2001-2005 for patients ≤65 years. The excess mortality was 37% lower in 2001-2005 than in 1989-1992 for these patients, adjusted for age, stage, trial participation and gender (p < .001). Survival did not improve for older patients. In conclusion: MM survival improved among younger but not among older patients since the mid-1990s. The improved survival of younger patients coincided with increasing trial participation and increasing use of high-dose chemotherapy and autologous stem-cell transplantation. © 2009 Elsevier Ltd. All rights reserved. Source


Van De Glind E.M.,University of Amsterdam | Van Munster B.C.,Gelre Hospitals | Van De Wetering F.T.,University of Amsterdam | Van Delden J.J.,University Utrecht | And 2 more authors.
BMC Geriatrics | Year: 2013

Background: To enable older people to make decisions about the appropriateness of cardiopulmonary resuscitation (CPR), information is needed about the predictive value of pre-arrest factors such as comorbidity, functional and cognitive status on survival and quality of life of survivors. We systematically reviewed the literature to identify pre-arrest predictors for survival, quality of life and functional outcomes after out-of-hospital (OHC) CPR in the elderly. Methods. We searched MEDLINE (through May 2011) and included studies that described adults aged 70 years and over needing CPR after OHC cardiac arrest. Prognostic factors associated with survival to discharge and quality of life of survivors were extracted. Two authors independently appraised the quality of each of the included studies. When possible a meta-analysis of odd's ratios was performed. Results: Twenty-three studies were included (n = 44,582). There was substantial clinical and statistical heterogeneity and reporting was often inadequate. The pooled survival to discharge in patients >70 years was 4.1% (95% CI 3.0-5.6%). Several studies showed that increasing age was significantly associated with worse survival, but the predictive value of comorbidity was investigated in only one study. In another study, nursing home residency was independently associated with decreased chances of survival. Only a few small studies showed that age is negatively associated with a good quality of life of survivors. We were unable to perform a meta-analysis of possible predictors due to a wide variety in reporting and statistical methods. Conclusions: Although older patients have a lower chance of survival after CPR in univariate analysis (i.e. 4.1%), older age alone does not seem to be a good criterion for denying patients CPR. Evidence for the predictive value of comorbidities and for the predictive value of age on quality of life of survivors is scarce. Future studies should use uniform methods for reporting data and pre-arrest factors to increase the available evidence about pre arrest factors on the chance of survival. Furthermore, patient-specific outcomes such as quality of life and post-arrest cognitive function should be investigated too. © 2013 van de Glind et al.; licensee BioMed Central Ltd. Source


Leeuwenburgh M.M.N.,University of Amsterdam | Wiezer M.J.,St. Antonius Hospital | Wiarda B.M.,Alkmaar Medical Center | Bouma W.H.,Gelre Hospitals | And 6 more authors.
British Journal of Surgery | Year: 2014

Background: Discrimination between simple and perforated appendicitis in patients with suspected appendicitis may help to determine the therapy, timing of surgery and risk of complications. The aim of this study was to estimate the accuracy of magnetic resonance imaging (MRI) in distinguishing between simple and perforated appendicitis, and to compare MRI against ultrasound imaging with selected additional (conditional) use of computed tomography (CT). Methods: Patients with clinically suspected appendicitis were identified prospectively at the emergency department of six hospitals. Consenting patients underwent MRI, but were managed based on findings at ultrasonography and conditional CT. Radiologists who evaluated the MRI were blinded to the results of ultrasound imaging and CT. The presence of perforated appendicitis was recorded after each evaluation. The final diagnosis was assigned by an expert panel based on perioperative data, histopathology and clinical follow-up after 3 months. Results: MRI was performed in 223 of 230 included patients. Acute appendicitis was the final diagnosis in 118 of 230 patients, of whom 87 had simple and 31 perforated appendicitis. MRI correctly identified 17 of 30 patients with perforated appendicitis (sensitivity 57 (95 per cent confidence interval 39 to 73) per cent), whereas ultrasound imaging with conditional CT identified 15 of 31 (sensitivity 48 (32 to 65) per cent) (P = 0·517). All missed diagnoses of perforated appendicitis were identified as simple acute appendicitis with both imaging protocols. None of the MRI features for perforated appendicitis had a positive predictive value higher than 53 per cent. Conclusion: MRI is comparable to ultrasonography with conditional use of CT in identifying perforated appendicitis. However, both strategies incorrectly classify up to half of all patients with perforated appendicitis as having simple appendicitis. Triage of appendicitis based on imaging for conservative treatment is inaccurate and may be considered unsafe for decision-making. © 2013 BJS Society Ltd. Source

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