Publications by authors named "Clementsen P"

Article Synopsis
  • Endobronchial ultrasound (EBUS) is a safe and precise endoscopic method for diagnosing lymph node swelling and lung masses, improving lung cancer staging while minimizing the need for invasive surgeries.
  • Despite its advantages, several questions remain regarding informed consent differences, the potential for EBUS to replace standard bronchoscopy, and the best practices for performing the procedure.
  • The article discusses these ongoing challenges and seeks to clarify the best approaches for implementing EBUS in clinical settings.
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Background: Malignant pleural effusion (MPE) affects up to 15% of patients with malignancy, and the prevalence is increasing. Non-expandable lung (NEL) complicates MPE in up to 30% of cases. However, it is not known if patients with malignant pleural effusion and NEL are more symptomatic in activities of daily living compared to patients with MPE with expandable lung.

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Background: Bronchoscopy and EBUS are standard procedures in lung cancer work-up but have low diagnostic yield in lesions outside the central airways and hilar/mediastinal lymph nodes. Growing evidence on introducing the EBUS endoscope into the oesophagus (EUS-B) in the same session as bronchoscopy/EBUS gives access to new anatomical areas that can be safely biopsied.

Objective: To summarize the current evidence of the added value of EUS-B-FNA to bronchoscopy and EBUS-TBNA in lung cancer work-up.

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An erratum was issued for: Local Anesthetic Thoracoscopy for Undiagnosed Pleural Effusion. The Authors section was updated from: Uffe Bodtger José M. Porcel Rahul Bhatnagar Mohammed Munavvar Casper Jensen Paul Frost Clementsen Daniel Bech Rasmussen Respiratory Research Unit PLUZ, Department of Respiratory Medicine, Zealand University Hospital Institute of Regional Health Research, University of Southern Denmark Pleural Medicine Unit, Department of Internal Medicine, Hospital Universitari Arnau de Vilanova, IRBLleida Respiratory Department, Southmead Hospital, North Bristol NHS Trust Academic Respiratory Unit, University of Bristol Lancashire Teaching Hospitals University of Central Lancashire Centre for HR and Education, Copenhagen Academy for Medical Education and Simulation to: Uffe Bodtger José M.

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Background: Non-expandable lung (NEL) has severe implications for patient symptoms and impaired lung function, as well as crucial implications for the management of malignant pleural effusion (MPE). Indwelling pleural catheters have shown good symptom relief for patients with NEL; hence, identifying patients early in their disease is vital. With the inability of the lung to achieve pleural apposition following thoracentesis and the formation of a hydropneumothorax, traditionally, chest X-ray and clinical symptoms have been used to make the diagnosis following thoracentesis.

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EUS-B is a procedure using the echoendobronchoscope in the esophagus and stomach. The procedure is a minimally invasive, safe, and feasible approach that pulmonologists can use to visualize and biopsy structures adjacent to the esophagus and stomach. EUS-B gives access to many structures of which some may also be reached by EBUS (mediastinal lymph nodes, lung or pleural tumors, pericardial fluid) while others cannot be reached such as retroperitoneal lymph nodes, ascites, and lesions in the liver, pancreas or left adrenal gland.

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Local anesthetic thoracoscopy (LAT) is a minimally invasive diagnostic procedure gaining recognition among chest physicians for managing undiagnosed pleural effusions. This single-port procedure is conducted with the patient under mild sedation and involves a contralateral decubitus position. It is performed in a sterile setting, typically a bronchoscopy suite or surgical theater, by a single operator with support from a procedure-focused nurse and a patient-focused nurse.

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Background: Navigating through the bronchial tree and visualizing all bronchial segments is the initial step toward learning flexible bronchoscopy. A novel bronchial segment identification system based on artificial intelligence (AI) has been developed to help guide trainees toward more effective training.

Research Question: Does feedback from an AI-based automatic bronchial segment identification system improve novice bronchoscopists' end-of-training performance?

Study Design And Methods: The study was conducted as a randomized controlled trial in a standardized simulated setting.

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Lung cancer is the leading cause of cancer mortality globally. To ensure the correct diagnosis and staging in relation to treatment options, it is crucial to obtain valid biopsies from suspected tumors and mediastinal lymph nodes and accurate identification of the mediastinal lymph nodes regarding the Tumor-Node-Metastasis (TNM)-classification. Flexible bronchoscopy combined with endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA) is essential in the workup and diagnosis of patients suspected of lung cancer.

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Biopsying lung tumours with endobronchial access in patients with respiratory impairment is challenging. However, fine needle aspiration with the endobronchial ultrasound-endoscope via the oesophagus (EUS-B-FNA) makes it possible to obtain tissue samples without entering the airways. Safety of EUS-B-FNA in these patients has not earlier been investigated prospectively.

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Flexible bronchoscopy is a technically difficult procedure and has been identified as the most important procedure that should be integrated into a simulation-based training program for pulmonologists. However, more specific guidelines that govern bronchoscopy training are needed to meet this demand. To ensure patients a competent examination, we propose a systematic, stepwise approach, splitting the procedure into four "landmarks" to support novice endoscopists navigating the bronchial maze.

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Background: In patients with pleural effusion, specific ultrasound characteristics are associated with pleural malignancy.

Objectives: This study aimed to evaluate the added value of an additional, up-front, systematic thoracic ultrasound (TUS) to standard imaging in patients with unilateral pleural effusion of unknown cause in a clinical setting.

Methods: In a prospective observational pilot study, patients referred for workup and thoracentesis of a unilateral pleural effusion received up-front TUS following a set protocol in addition to available imaging and US guiding the thoracentesis or diagnostic puncture.

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This is the first paper to report sampling of pancreatic lesions by EUS-B-FNA. A 76 year old patient suspected of primary lung cancer presented with a 36 × 24 mm lesion in the pancreas. Thoracentesis showed malignant cells suggestive of mucinous adenocarcinoma, but immunohistochemistry was inconclusive.

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Background: The value of pre-booked repeated thoracentesis in patients with recurrent pleural effusion is reliant on the estimation of time to next drainage. Identifying factors associated with rapid pleural fluid recurrence could be supportive.

Objective: We aimed to evaluate the ability of the patient and physician to predict the time to next therapeutic thoracentesis and to identify characteristics associated with rapid pleural fluid recurrence.

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Background: Bronchoscopy is an essential procedure in the diagnosis and treatment of pulmonary diseases. However, the literature suggests that distractions affect the quality of bronchoscopy and affect inexperienced doctors more than experienced.

Objectives: The objective of the study was as follows: does simulation-based bronchoscopy training with immersive virtual reality (iVR) improve the doctors' ability to handle distractions and thereby increase the quality, measured in procedure time, structured progression score, diagnostic completeness (%), and hand motor movements of a diagnostic bronchoscopy in a simulated scenario.

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Predicting factors of diagnostic yield in electromagnetic navigation bronchoscopy (ENB) have been explored in a number of previous studies based on data from experienced operators. However, little is known about predicting factors when the procedure is carried out by operators in the beginning of their learning curve. We here aim to identify the role of operators' experience as well as lesion- and procedure characteristics on diagnostic yield of ENB procedures in the hands of novice ENB operators.

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Dental care workers are frequently exposed to various types of volatile organic and inorganic compounds. In addition to biological materials, these compounds include silica, heavy metals, and acrylic plastics. Such exposures may cause respiratory symptoms, but the nonspecific nature of these symptoms often means that the etiology is difficult to discern.

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There is an increasing need to focus on how best to train respiratory physicians to perform EUS with bronchoscope-guided fine-needle aspiration biopsy (EUS-B-FNA). At current, training is mostly performed in the clinical environment under expert supervision; however, the advent of simulation-based education now provides a low-risk setting for novice trainees to learn and practice basic endosonography skills from identifying and understanding normal anatomy as well as pathology, maneuvering of endoscope, interpretation of images, and mastering of sampling techniques. In this descriptive educational paper, we used a six-step approach as a framework to describe the development of a structured training program combining EUS-B-FNA with the already well-established certification training program in endobronchial ultrasound transbronchial needle aspiration.

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The role of endobronchial ultrasound (EBUS) and trans-esophageal endobronchial ultrasound (EUS-B) in lung cancer is well established and scientifically validated. There is increasing data that endosonography is a crucial tool for the diagnosis of central lung lesions, and mediastinal staging and restaging of non-small cell lung cancer patients. The present article reviews the technical aspects of EBUS and EUS-B and focus on the last published research regarding its value in lung cancer.

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Waldenström macroglobulinemia rarely presents as pulmonary symptoms, and even rarer as chylothorax. We present a patient who presented with bilateral pleural effusion and a 30 mm solid lesion in the lung. Biochemical analysis of the pleural fluid revealed chylothorax.

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Pulmonary blastoma is an aggressive lung cancer with incidence ranging from 0.25-0.5 of all the reported lung cancers.

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Background: Oncological treatment of primary pulmonary adenocarcinoma (AC) includes drugs targeting the pathways involving (PD-L1), (EGFR) mutation and (ALK). The aim of the study was to report the prevalence of these tumour markers in pleural fluid with cytology positive for pulmonary AC and the potential influence of volume pleural fluid tested.

Methods: We retrospectively reviewed all thoracenteses performed in a two-year period at our interventional unit at Department of Respiratory Medicine at Zealand University Hospital Naestved, Denmark.

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Background: Electromagnetic navigation bronchoscopy (ENB) is a relatively new and technically demanding procedure for the guidance of bronchoscopic biopsy to help locate small lung lesions. The results in experienced hands are well described. However, we do not know the results in unexperienced hands-in other words, we have no knowledge about how fast you can learn the procedure.

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Background: The aims of the study were to develop an assessment tool in local anaesthetic thoracoscopy (LAT), investigate validity evidence, and establish a pass/fail standard.

Methods: Validity evidence for the assessment tool was gathered using the unified Messick framework. The tool was developed by five experts in respiratory medicine and medical education.

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