Publications by authors named "Hans J Lee"

Interventional pulmonology (IP) fellowship training has undergone increased popularity and growth. The Accreditation Council of Graduate Medical Education recently recognized IP medicine as a new subspecialty, which leads to new challenges and opportunities for a young subspecialty. Although the specialty-specific requirements are in progress, IP fellowship programs must plan ahead for the known common program requirements and anticipated accreditation process.

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Strict adherence to procedural protocols and diagnostic definitions is critical to understand the efficacy of new technologies. Electromagnetic navigational bronchoscopy (ENB) for lung nodule biopsy has been used for decades without a solid understanding of its efficacy, but offers the opportunity for simultaneous tissue acquisition via electromagnetic navigational transthoracic biopsy (EMN-TTNA) and staging via endobronchial ultrasound (EBUS). To evaluate the diagnostic yield of EBUS, ENB, and EMN-TTNA during a single procedure using a strict definition of diagnostic yield with central pathology adjudication.

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Background: Flexible bronchoscopy is an essential tool in diagnosing and managing pulmonary diseases. However, there is limited capacity for bronchoscopy in low and middle income countries (LMICs). In 2019, a pilot program for flexible bronchoscopy training was launched for local physicians in Kampala, Uganda.

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Robotic bronchoscopy (RB) has been shown to improve access to smaller and more peripheral lung lesions, while simultaneously staging the mediastinum. Pre-clinical studies demonstrated extremely high diagnostic yields, but real-world RB yields have yet to fully matched up in prospective studies. Despite this, RB technology has rapidly evolved and has great potential for lung-cancer diagnosis and even treatment.

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Background: Bronchoscopy is commonly utilized for non-surgical sampling of indeterminant pulmonary lesions, but nondiagnostic procedures are common. Accurate assessment of the risk of malignancy is essential for decision making in these patients, yet we lack tools that perform well across this heterogeneous group of patients. We sought to evaluate the accuracy of three previously validated risk models and physician-assessed risk (PAR) in patients with a newly identified lung lesion undergoing bronchoscopy for suspected lung cancer where the result is nondiagnostic.

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Background: Bronchoscopic lung biopsy is typically performed using transbronchial forceps. However, this method is limited by small sample size and presence of crush artifact. Cryobiopsy offers the potential to overcome these limitations with larger artifact-free samples but has not been widely adopted due to concerns over increased rates of bleeding and pneumothorax.

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Article Synopsis
  • Current medical guidelines recommend specific procedural volumes for interventional pulmonology fellows to gain competency in electromagnetic navigational bronchoscopy (ENB), emphasizing the importance of structured training.
  • A multicenter study involving 26 fellows showed that the median number of ENB procedures required to reach competency is 4, but it can range from 2 to 15, indicating substantial variability.
  • The study identified six periprocedural complications, mostly occurring before fellows achieved competency, and highlighted the value of virtual assessments for determining competency, although further research is needed.
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The Percepta Genomic Sequencing Classifier (GSC) was developed to up-classify as well as down-classify the risk of malignancy for lung lesions when bronchoscopy is non-diagnostic. We evaluated the performance of Percepta GSC in risk re-classification of indeterminate lung lesions. This multicenter study included individuals who currently or formerly smoked undergoing bronchoscopy for suspected lung cancer from the AEGIS I/ II cohorts and the Percepta Registry.

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Article Synopsis
  • Recent advancements in robotic-assisted bronchoscopy (RAB) have shown varied success in biopsying peripheral pulmonary nodules (PPNs), leading to a study aimed at identifying factors that improve biopsy outcomes.
  • A preclinical trial using a cadaver model tested how different distances and techniques impact the likelihood of successfully puncturing targeted PPNs using RAB.
  • Findings indicated that the closer the robotic catheter was to the nodule (within 10 mm), the higher the success rate of obtaining a central target hit, highlighting distance as a key factor for effective biopsy.
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Background: Amid the Coronavirus Disease 2019 (COVID-19) pandemic, the benefits and risks of bronchoscopy remain uncertain. This study was designed to characterize bronchoscopy-related practice patterns, diagnostic yields, and adverse events involving patients with known or suspected COVID-19.

Methods: An online survey tool retrospectively queried bronchoscopists about their experiences with patients with known or suspected COVID-19 between March 20 and August 20, 2020.

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Malignant pleural effusions have a significant burden on patients and the health care system. Diagnosis is typically via thoracentesis, although other times more invasive procedures are required. Management centers around relief of dyspnea and patient quality of life and can be done via serial thoracentesis, indwelling pleural catheter, or pleurodesis.

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The impact of the coronavirus disease (COVID-19) pandemic extends beyond the realms of patient care and healthcare resource use to include medical education; however, the repercussions of COVID-19 on the quality of training and trainee perceptions have yet to be explored. The purpose of this study was to determine the degree of interventional pulmonology (IP) fellows' involvement in the care of COVID-19 and its impact on fellows' clinical education, procedure skills, and postgraduation employment search. An internet-based survey was validated and distributed among IP fellows in North American fellowship training programs.

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As the breadth of interventional pulmonology continues to expand, training in this discipline gains further importance. Interventional pulmonology training in the USA and Europe has common roots and similar concepts; however, there are variations in its delivery. We discuss the similarities, differences, challenges and goals of interventional pulmonology training in both continents.

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Video game playing requires many of the same skill sets as medical procedures such as bronchoscopy. These include visual-spatial awareness, rapid decision making, and psychomotor skills. The role of video game cross-training on learning bronchoscopy is unknown.

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Background: Flexible bronchoscopy is an essential procedure for the evaluation and management of the pulmonary disease. However, this technology and related training is not available in many low-middle income countries (LMICs). We conducted a pilot training program for flexible bronchoscopy in Uganda.

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Patients with malignant or paramalignant pleural effusions (MPEs or PMPEs) may have tunneled pleural catheter (TPC) management withheld because of infection concerns from immunosuppression associated with antineoplastic therapy. To determine the rate of infections related to TPC use and to determine the relationship to antineoplastic therapy, immune system competency, and overall survival (OS). We performed an international, multiinstitutional study of patients with MPEs or PMPEs undergoing TPC management from 2008 to 2016.

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Background: The Percepta genomic classifier has been clinically validated as a complement to bronchoscopy for lung nodule evaluation.

Research Question: The goal of this study was to examine the impact on clinical management decisions of the Percepta result in patients with low- and intermediate-risk lung nodules.

Study Design And Methods: A prospective "real world" registry was instituted across 35 US centers to observe physician management of pulmonary nodules following a nondiagnostic bronchoscopy.

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Interventional pulmonology (IP) is a maturing subspecialty of pulmonary medicine. The robust innovation in technology demands standardization in IP training with both disease and technology driven training. Simulation based training should be considered a part of IP training as seen in other procedural and surgical subspecialties.

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Background: Interventional pulmonary (IP) fellows spend ≥6 years of postgraduate medical education before IP training. Given the high employment attrition rates of early medical professionals, we investigated the IP fellows' self-assessed readiness for employment and the role of an intense preemployment educational intervention on improving the same.

Materials And Methods: Over 2 consecutive academic years, IP fellows nationally were invited to a mid-year career development symposium focusing on employment search strategy and early career development.

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Background: Poor ergonomics place health care workers at risk for work-related overuse injuries. Repetitive and prolonged hand maneuvers, such as those performed during endoscopic procedures, may lead to musculoskeletal complaints and work-related injuries. However, the prevalence of health care-related work injuries among physicians is thought to be underreported and there is a paucity of literature investigating the impact of ergonomic strain on bronchoscopy.

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