Publications by authors named "Kralingen K"

Objective: In 2010, a questionnaire-based study on obstructive sleep apnea (OSA) management in Europe identified differences regarding reimbursement, sleep specialist qualification, and titration procedures. Now, 10 years later, a follow-up study was conducted as part of the ESADA (European Sleep Apnea Database) network to explore the development of OSA management over time.

Methods: The 2010 questionnaire including questions on sleep diagnostic, reimbursement, treatment, and certification was updated with questions on telemedicine and distributed to European Sleep Centers to reflect European OSA management practice.

View Article and Find Full Text PDF

M.bovis BCG vaccination against tuberculosis (TB) notoriously displays variable protective efficacy in different human populations. In non-human primate studies using rhesus macaques, despite efforts to standardise the model, we have also observed variable efficacy of BCG upon subsequent experimental M.

View Article and Find Full Text PDF

Rationale: Outpatient treatment of pulmonary embolism (PE) may lead to improved patient satisfaction and reduced healthcare costs. However, trials to assess its safety and the optimal method for patient selection are scarce.

Objectives: To validate the utility and safety of selecting patients with PE for outpatient treatment by the Hestia criteria and to compare the safety of the Hestia criteria alone with the Hestia criteria combined with N-terminal pro-brain natriuretic peptide (NT-proBNP) testing.

View Article and Find Full Text PDF

We have previously shown that acute sleep curtailment induces insulin resistance, both in healthy individuals as well as in patients with type 1 diabetes, suggesting a causal role for sleep disturbances in pathogenesis of insulin resistance, independent of endogenous insulin production. However, the underlying mechanisms remain unclear. This study aimed to explore the metabolic pathways affected by sleep loss using targeted metabolomics in human fasting plasma samples.

View Article and Find Full Text PDF

Importance: D-dimer measurement is an important step in the diagnostic strategy of clinically suspected acute pulmonary embolism (PE), but its clinical usefulness is limited in elderly patients.

Objective: To prospectively validate whether an age-adjusted D-dimer cutoff, defined as age × 10 in patients 50 years or older, is associated with an increased diagnostic yield of D-dimer in elderly patients with suspected PE.

Design, Settings, And Patients: A multicenter, multinational, prospective management outcome study in 19 centers in Belgium, France, the Netherlands, and Switzerland between January 1, 2010, and February 28, 2013.

View Article and Find Full Text PDF

Purpose: Tumors in the carotid bodies may interfere with their function as peripheral chemoreceptors. An altered control of ventilation may predispose to sleep-disordered breathing. This study aimed to assess whether patients with unilateral or bilateral carotid body tumors (uCBT or bCBT, respectively) or bilateral CBT resection (bCBR) display sleep-disordered breathing and to evaluate the global contribution of the peripheral chemoreceptor to the hypercapnic ventilatory response.

View Article and Find Full Text PDF

Objective: To examine if lung-parenchymal sparing resection ('sleeve' resection) is a safe and oncologically responsible alternative to pneumonectomy in patients with central tumours. Further, to evaluate in how far this technique is being used in the Netherlands.

Design: Retrospective cohort study.

View Article and Find Full Text PDF

Incomplete resolution of acute pulmonary embolism (PE) is frequently observed after acute PE and may rarely result in chronic thromboembolic pulmonary hypertension (CTEPH). The underlying pathophysiological mechanism is largely unknown. Evidence underlines the concept of a dual pulmonary vascular compartment model consisting of increased pulmonary vascular resistance by both large vessel obstruction and distal small vessel obliteration, the latter initiated by pathological vascular remodeling.

View Article and Find Full Text PDF

We present a case of pulmonary nontuberculous mycobacterial infection (PNTM) with M. abscessus. After exclusion of genetic immune disorders known to cause NTM susceptibility, we found compound heterozygosity of two mutations, F508del and R117H in CFTR.

View Article and Find Full Text PDF

Purpose: The aim of this study was to investigate the use of the electrocardiogram-derived ventricular gradient, projected on the x-axis (VGx), for detection of pulmonary hypertension (PH) and for prediction of all-cause mortality in PH patients.

Methods: In patients referred for PH screening (n = 216), the VGx was calculated semiautomatically from the electrocardiogram and was defined as abnormal when less than 24 mV · ms. The VGx of PH patients was compared with the VGx of patients without PH.

View Article and Find Full Text PDF

Background: Traditionally, patients with pulmonary embolism (PE) are initially treated in the hospital with low molecular weight heparin (LMWH). The results of a few small non-randomized studies suggest that, in selected patients with proven PE, outpatient treatment is potentially feasible and safe.

Objective: To evaluate the efficacy and safety of outpatient treatment according to predefined criteria in patients with acute PE.

View Article and Find Full Text PDF

Objectives: The carotid body functions as a chemoreceptor. We hypothesized that head-and-neck paragangliomas (HNP) may disturb the function of these peripheral chemoreceptors and play a role in sleep-disordered breathing.

Design: This is a case-control study.

View Article and Find Full Text PDF

Aims/hypothesis: Decreased sleep duration and/or impaired sleep quality negatively influence glucoregulation. The aim of this study was to assess subjective sleep characteristics in patients with type 1 diabetes, to relate sleep characteristics to long-term glycaemic control and to assess possible risk factors for impaired sleep.

Methods: We studied 99 adult patients with type 1 diabetes (55 men, 44 women, duration of diabetes 26.

View Article and Find Full Text PDF

Background: Our aim was to construct a diagnostic model for ruling out chronic thromboembolic pulmonary hypertension (CTEPH) in symptomatic patients after acute pulmonary embolism (PE) that is based on simple, non-invasive tests.

Methods: Plasma levels of various CTEPH associated biomarkers and conventional ECG criteria for right ventricular pressure overload were assessed in 82 consecutive patients with confirmed CTEPH and 160 consecutive patients with a history of PE who were suspected to have CTEPH, but in whom this disease was ruled out.

Results: ECG criteria of right ventricular hypertrophy were detected more frequently in patients with CTEPH (77%) than in the patients without CTEPH (11%, Odds ratio 26, 95% confidence interval [CI] 13-53).

View Article and Find Full Text PDF

Context And Objective: Fatigue and excessive sleepiness have been reported after treatment of nonfunctioning pituitary macroadenomas (NFMA). Because these complaints may be caused by disturbed nocturnal sleep, we evaluated objective sleep characteristics in patients treated for NFMA.

Design: We conducted a controlled cross-sectional study.

View Article and Find Full Text PDF

This study examined quality of life (QOL) and illness perceptions in Dutch and Japanese patients with non-small-cell lung cancer, thereby extending the body of knowledge on cultural differences and psychosocial aspects of this illness. 24 Dutch and 22 Japanese patients with non-small-cell lung cancer filled out questionnaires on three occasions: immediately before chemotherapy, 1 week later, and 8 weeks after the initial chemotherapy. The European Organization for Research and Treatment of Cancer Quality of Life Questionnaire (EORTC QLQ-C30) assessed QOL, and the Brief Illness Perception Questionnaire (B-IPQ) illness perceptions.

View Article and Find Full Text PDF

Background: The exact prevalence and etiology of exertional dyspnea in the clinical course of acute pulmonary embolism (PE) have not yet been established.

Methods: A large cohort of consecutive patients diagnosed with acute PE was subjected to a dyspnea questionnaire and invited for cardiopulmonary work-up including the 6-min walk test, spirometry and echocardiography. The prevalence, severity, determinants and underlying diseases of exertional dyspnea were evaluated.

View Article and Find Full Text PDF

Background: To our knowledge, studies evaluating the quality of life (QoL) in patients with a history of acute pulmonary embolism (PE) are not available, even though QoL is a key outcome component of medical care and a predictor of disease-specific prognosis.

Methods: As part of a large follow-up study, the Short Form 36 (SF-36) was presented to consecutive patients who had survived one or more episodes of acute PE. The results of all nine subscales of the SF-36 were compared with sex- and age-adjusted Dutch population norms.

View Article and Find Full Text PDF

Background: Subsequent nights with partial sleep restriction result in impaired glucose tolerance, but the effects on insulin sensitivity have not been characterized.

Objective: The aim of this study was to evaluate the effect of a single night of partial sleep restriction on parameters of insulin sensitivity.

Research Design And Methods: Nine healthy subjects (five men, four women) were studied once after a night of normal sleep duration (sleep allowed from 2300 to 0730 h), and once after a night of 4 h of sleep (sleep allowed from 0100 to 0500 h).

View Article and Find Full Text PDF

Objective: Sleep restriction results in decreased insulin sensitivity and glucose tolerance in healthy subjects. We hypothesized that sleep duration is also a determinant of insulin sensitivity in patients with type 1 diabetes.

Research Design And Methods: We studied seven patients (three men, four women) with type 1 diabetes: mean age 44 +/- 7 years, BMI 23.

View Article and Find Full Text PDF

Background: Chronic thromboembolic pulmonary hypertension after pulmonary embolism is associated with high morbidity and mortality. Understanding the incidence of chronic thromboembolic pulmonary hypertension after pulmonary embolism is important for evaluating the need for screening but is also a subject of debate because of different inclusion criteria among previous studies. We determined the incidence of chronic thromboembolic pulmonary hypertension after acute pulmonary embolism and the utility of a screening program for this disease.

View Article and Find Full Text PDF

Background: Even though quality of life (QoL) has become a key component of medical care, there is no instrument available that specifically measures QoL after pulmonary embolism (PE). Recently, the Pulmonary Embolism Quality of Life (PEmb-QoL) Questionnaire has been developed to address this gap.

Objective: To evaluate the validity of the PEmb-QoL questionnaire.

View Article and Find Full Text PDF

Rationale: There is a lack of information on the long-term prognosis of patients with acute pulmonary embolism (PE).

Objectives: To assess the long-term risk for adverse events after PE.

Methods: Consecutive patients diagnosed with PE between January 2001 and July 2007, and patients in whom PE was ruled out from a previous study were followed until July 2008 for the occurrence of adverse clinical events: mortality, symptomatic recurrent venous thromboembolism, cancer, arterial cardiovascular events and chronic thromboembolic pulmonary hypertension.

View Article and Find Full Text PDF

Background: Continuous high global tuberculosis (TB) mortality rates and variable vaccine efficacy of Mycobacterium bovis Bacille Calmette-Guérin (BCG) motivate the search for better vaccine regimes. Relevant models are required to downselect the most promising vaccines entering clinical efficacy testing and to identify correlates of protection.

Methods And Findings: Here, we evaluated immunogenicity and protection against Mycobacterium tuberculosis in rhesus monkeys with two novel strategies: BCG boosted by modified vaccinia virus Ankara expressing antigen 85A (MVA.

View Article and Find Full Text PDF