Pulmonary TherapyPub Date : 2024-06-01Epub Date: 2024-05-17DOI: 10.1007/s41030-024-00257-z
Ramiyya Tharumakunarajah, Alice Lee, Daniel B Hawcutt, Nicola L Harman, Ian P Sinha
{"title":"The Impact of Malnutrition on the Developing Lung and Long-Term Lung Health: A Narrative Review of Global Literature.","authors":"Ramiyya Tharumakunarajah, Alice Lee, Daniel B Hawcutt, Nicola L Harman, Ian P Sinha","doi":"10.1007/s41030-024-00257-z","DOIUrl":"10.1007/s41030-024-00257-z","url":null,"abstract":"<p><p>Worldwide, over 2 billion children under the age of 5 experience stunting, wasting, or are underweight. Malnutrition contributes to 45% of all deaths in this age group (approximately 3.1 million deaths) [1]. Poverty, food insecurity, suboptimal feeding practices, climate change, and conflict are all contributing factors. Malnutrition causes significant respiratory problems, including increased risk of respiratory infections, impaired lung function, and increased risk of subsequent adult respiratory disease, including asthma, COPD, and lung cancer. Childhood malnutrition not only has serious consequences for children's health but it also has numerous consequences on wellbeing and educational attainment. Childhood malnutrition is a complex and multifaceted problem. However, by understanding and addressing the underlying causes, and investing in prevention and treatment programs, it is possible to maximize children's health and wellbeing on a global scale. This narrative review will focus on the impact of childhood malnutrition on lung development, the consequent respiratory disease, and what actions can be taken to reduce the burden of malnutrition on lung health.</p>","PeriodicalId":20919,"journal":{"name":"Pulmonary Therapy","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11282003/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140959311","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pulmonary TherapyPub Date : 2024-06-01DOI: 10.1007/s41030-024-00259-x
Stanislav Glezer, Gregoire Mercier, Jean-Marc Coursier, Nicoleta Petrica, Maria Pini, Abhijith Pg
{"title":"Health and Economic Impact of Different Long-Term Oxygen Therapeutic Strategies in Patients with Chronic Respiratory Failure: A French Nationwide Health Claims Database (SNDS) Study.","authors":"Stanislav Glezer, Gregoire Mercier, Jean-Marc Coursier, Nicoleta Petrica, Maria Pini, Abhijith Pg","doi":"10.1007/s41030-024-00259-x","DOIUrl":"10.1007/s41030-024-00259-x","url":null,"abstract":"<p><strong>Introduction: </strong>Long-term oxygen therapy (LTOT) is reported to improve survival in patients with chronic respiratory failure. We aimed to describe effectiveness, burden, and cost of illness of patients treated with portable oxygen concentrators (POC) compared to other LTOT options.</p><p><strong>Methods: </strong>This retrospective comparative analysis included adult patients with chronic respiratory insufficiency and failure (CRF) upon a first delivery of LTOT between 2014 and 2019 and followed until December 2020, based on the French national healthcare database SNDS. Patients using POC, alone or in combination, were compared with patients using stationary concentrators alone (aSC), or compressed tanks (CTC) or liquid oxygen (LO2), matched on the basis of age, gender, comorbidities, and stationary concentrator use.</p><p><strong>Results: </strong>Among 244,719 LTOT patients (mean age 75 ± 12, 48% women) included, 38% used aSC, 46% mobile oxygen in the form of LO2 (29%) and POC (18%), whereas 9% used CTC. The risk of death over the 72-month follow-up was estimated to be 13%, 15%, and 12% lower for patients in the POC group compared to aSC, CTC, and LO2, respectively. In the POC group yearly mean total costs per patient were 5% higher and 4% lower compared to aSC and CTC groups, respectively, and comparable in the LO2 group. The incremental cost-effectiveness ratio (ICER) of POC was €8895, €6288, and €13,152 per year of life gained compared to aSC, CTC, and LO2, respectively.</p><p><strong>Conclusion: </strong>Within the POC group, we detected an association between higher mobility (POCs autonomy higher than 5 h), improved survival, lower costs, and ICER - €6 238, compared to lower mobility POCs users.</p>","PeriodicalId":20919,"journal":{"name":"Pulmonary Therapy","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11282007/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141186858","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pulmonary TherapyPub Date : 2024-05-17DOI: 10.1007/s41030-024-00257-z
Ramiyya Tharumakunarajah, Alice Lee, Daniel B. Hawcutt, Nicola L Harman, Ian P. Sinha
{"title":"The Impact of Malnutrition on the Developing Lung and Long-Term Lung Health: A Narrative Review of Global Literature.","authors":"Ramiyya Tharumakunarajah, Alice Lee, Daniel B. Hawcutt, Nicola L Harman, Ian P. Sinha","doi":"10.1007/s41030-024-00257-z","DOIUrl":"https://doi.org/10.1007/s41030-024-00257-z","url":null,"abstract":"","PeriodicalId":20919,"journal":{"name":"Pulmonary Therapy","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140963872","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pulmonary TherapyPub Date : 2024-05-17DOI: 10.1007/s41030-024-00258-y
Michael Coakley, Michael Drohan, Elaine Bruce, Sylvia Hughes, Neil Jackson, Steve Holmes
{"title":"COPD Self-Management: A Patient-Physician Perspective.","authors":"Michael Coakley, Michael Drohan, Elaine Bruce, Sylvia Hughes, Neil Jackson, Steve Holmes","doi":"10.1007/s41030-024-00258-y","DOIUrl":"https://doi.org/10.1007/s41030-024-00258-y","url":null,"abstract":"","PeriodicalId":20919,"journal":{"name":"Pulmonary Therapy","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140965304","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pulmonary TherapyPub Date : 2024-04-15DOI: 10.1007/s41030-024-00256-0
Judy Schloss, D. Coppolo, Jason A Suggett, M. Nagel, J. Mitchell
{"title":"Interchanging Reusable and Disposable Nebulizers Used with Home-Based Compressors May Result in Inconsistent Dosing: A Laboratory Investigation with Device Combinations Supplied to the US Healthcare Environment.","authors":"Judy Schloss, D. Coppolo, Jason A Suggett, M. Nagel, J. Mitchell","doi":"10.1007/s41030-024-00256-0","DOIUrl":"https://doi.org/10.1007/s41030-024-00256-0","url":null,"abstract":"","PeriodicalId":20919,"journal":{"name":"Pulmonary Therapy","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140700497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pulmonary TherapyPub Date : 2024-03-01Epub Date: 2023-11-11DOI: 10.1007/s41030-023-00243-x
Kazuki Kitahara, Junichi Omura, Shingo Wada, Seok-Won Kim
{"title":"Patient and Therapeutic Profiles of Pulmonary Hypertension in Chronic Lung Diseases in Japan: A Cohort Study Using a Claims Database.","authors":"Kazuki Kitahara, Junichi Omura, Shingo Wada, Seok-Won Kim","doi":"10.1007/s41030-023-00243-x","DOIUrl":"10.1007/s41030-023-00243-x","url":null,"abstract":"<p><strong>Introduction: </strong>Pulmonary hypertension (PH) is often complicated by chronic lung diseases (CLDs) such as chronic obstructive pulmonary disease (COPD) and interstitial lung disease (ILD). Differentiating between PH associated with CLD (group 3 PH) and pulmonary arterial hypertension (PAH) in CLD is often difficult and reporting on the efficacy of PAH-specific therapies is inconsistent as a result of the lack of understanding of the heterogeneity of patients with PH.</p><p><strong>Methods: </strong>A retrospective observational cohort study was conducted to understand the baseline characteristics, comorbidities, and treatment profiles of patients with PH in CLD in a real-world setting using a large-scale claims database (Medical Data Vision). Administrative and clinical data for patients admitted to acute-care hospitals in Japan between April 2008 and January 2021 were analyzed.</p><p><strong>Results: </strong>A total of 115,921 patients with CLD (109,578 with COPD and 6343 with ILD, of whom 569 and 176 had PH, respectively) were analyzed. This study found lower PH diagnosis rates among patients with COPD and patients with ILD than in previous studies. The majority of PH with CLD patients were elderly (mean age 75.7 years) and male (80.81%). Among patients with CLD prescribed PAH-specific therapies (105 patients with COPD; 64 patients with ILD), most received these as monotherapy (COPD, 84.76%; ILD, 75.56%); the most common were phosphodiesterase 5 inhibitors (COPD, 42.70%; ILD, 18.37%), prostacyclins (oral; COPD, 48.31%; ILD, 24.49%), and endothelin receptor antagonists (ERA) (COPD, 8.99%; ILD, 18.37%). Comorbidities (e.g., pulmonary, cardiac, kidney), home oxygen therapy (HOT), and echocardiography (ECHO) were factors associated with the diagnosis of PH.</p><p><strong>Conclusion: </strong>This is the first study using an administrative database that provides real-world data on patients with PH in CLD in Japan. Our results indicate that PH may be misdiagnosed or underdiagnosed in Japan which may lead to suboptimal treatment for patients, and supports the need for further evidence to guide appropriate treatment.</p>","PeriodicalId":20919,"journal":{"name":"Pulmonary Therapy","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10881911/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89719361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pulmonary TherapyPub Date : 2024-03-01Epub Date: 2024-02-07DOI: 10.1007/s41030-024-00252-4
Stanislav Glezer, Michael W Hess, Alan K Kamada
{"title":"Patient Use Patterns of Portable Oxygen Concentrators.","authors":"Stanislav Glezer, Michael W Hess, Alan K Kamada","doi":"10.1007/s41030-024-00252-4","DOIUrl":"10.1007/s41030-024-00252-4","url":null,"abstract":"<p><strong>Introduction: </strong>Portable oxygen concentrators (POCs) are medical devices that provide supplemental oxygen to patients requiring long-term oxygen therapy. However, little information is available on day-to-day patterns of how or even whether patients actively switch between their POC mobility features and flow setting options.</p><p><strong>Methods: </strong>A retrospective analysis was conducted to assess POC usage among patients who used an Inogen One G5 POC in the USA. This study aimed (1) to describe the patterns of use of POCs, (2) to analyze their compatibility with the prescribed oxygen therapy settings, and (3) to demonstrate the contribution of POC usage to get a standardized long-term oxygen therapy (LTOT). Data were directly downloaded from the devices returned for service or at the end of the Medicare Durable Medical Equipment rental period and streamed via a mobile application from 2018 to 2022. Daily usage, disconnections from the device, use of prescribed pulse delivery settings, breaths per minute, power sources, and movement with the POC were assessed. Device alert histories were also examined.</p><p><strong>Results: </strong>Data revealed a mean daily usage of 4.29 ± 3.23 h/day, ranging from 0.35 to 15.52 h/day. The prescribed pulse delivery setting was used by 31.34% of patients for at least 80% of their POC use time. When the POC was on battery power, patients were moving/mobile 41.99 ± 33.33% of the time. On the basis of the device-generated alerts, some patients continued to use their POC very close to or even beyond the lifetime of the column/sieve bed. Alerts or alarms potentially requiring repair occurred at a rate of 1.63 events per 100 years of use, indicating that device reliability did not significantly influence the use patterns.</p><p><strong>Conclusion: </strong>Patients used their POCs when mobile and at rest. A large proportion of patients adjust their POC settings during the day, which potentially indicates the need for the dynamic individualization of oxygen dose delivery to match activities of daily living or sleep. Patients require follow-up to ensure timely replacement of POC columns.</p>","PeriodicalId":20919,"journal":{"name":"Pulmonary Therapy","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10881926/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139698142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pulmonary TherapyPub Date : 2024-03-01Epub Date: 2024-02-15DOI: 10.1007/s41030-024-00253-3
Ricardo Amorim Correa, Francisco Arancibia, Renato De Ávila Kfouri, Alberto Chebabo, Gabriel García, Luis Miguel Gutiérrez Robledo, Gustavo Lopardo, Julio Nemerovsky, Carlos M Pérez, Adrian Rendon, Guillermo M Ruiz-Palacios, Bhumika Aggarwal, Arnas Berzanskis, Otavio Cintra
{"title":"Understanding the Burden of Respiratory Syncytial Virus in Older Adults in Latin America: An Expert Perspective on Knowledge Gaps.","authors":"Ricardo Amorim Correa, Francisco Arancibia, Renato De Ávila Kfouri, Alberto Chebabo, Gabriel García, Luis Miguel Gutiérrez Robledo, Gustavo Lopardo, Julio Nemerovsky, Carlos M Pérez, Adrian Rendon, Guillermo M Ruiz-Palacios, Bhumika Aggarwal, Arnas Berzanskis, Otavio Cintra","doi":"10.1007/s41030-024-00253-3","DOIUrl":"10.1007/s41030-024-00253-3","url":null,"abstract":"<p><p>Respiratory syncytial virus (RSV) is a significant global health concern and major cause of hospitalization, particularly among infants and older adults. The clinical impact of RSV is well characterized in infants; however, in many countries, the burden and risk of RSV in older populations are overlooked. In Latin America, there are limited data on RSV epidemiology and disease management in older adults. Therefore, the impact of RSV in this region needs to be addressed. Here, current insights on RSV infections in older populations in Latin America, including those with underlying health conditions, are discussed. We also outline the key challenges limiting our understanding of the burden of RSV in Latin America in a worldwide context and propose an expert consensus to improve our understanding of the burden of RSV in the region. By so doing, we aim to ultimately improve disease management and outcomes of those at risk and to alleviate the impact on healthcare systems.A graphical plain language summary is available with this article.</p>","PeriodicalId":20919,"journal":{"name":"Pulmonary Therapy","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10881952/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139736009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pulmonary TherapyPub Date : 2024-03-01Epub Date: 2024-01-07DOI: 10.1007/s41030-023-00251-x
Nick H Kim, Kelly M Chin, Vallerie V McLaughlin, Hilary DuBrock, Ricardo Restrepo-Jaramillo, Zeenat Safdar, Gwen MacDonald, Nicolas Martin, Daniel Rosenberg, Maria Solonets, Richard Channick
{"title":"Safety of Macitentan for the Treatment of Portopulmonary Hypertension: Real-World Evidence from the Combined OPUS/OrPHeUS Studies.","authors":"Nick H Kim, Kelly M Chin, Vallerie V McLaughlin, Hilary DuBrock, Ricardo Restrepo-Jaramillo, Zeenat Safdar, Gwen MacDonald, Nicolas Martin, Daniel Rosenberg, Maria Solonets, Richard Channick","doi":"10.1007/s41030-023-00251-x","DOIUrl":"10.1007/s41030-023-00251-x","url":null,"abstract":"<p><strong>Introduction: </strong>Portopulmonary hypertension (PoPH) carries a worse prognosis than other forms of pulmonary arterial hypertension (PAH). Data regarding use of PAH-specific therapies in patients with PoPH are sparse as they are usually excluded from clinical trials. This analysis describes patient characteristics, treatment patterns, outcomes, and safety profiles in patients with PoPH newly initiating macitentan in the USA using the OPUS/OrPHeUS combined dataset.</p><p><strong>Methods: </strong>OPUS was a prospective, US, multicenter, observational drug registry (April 2014-June 2020); OrPHeUS was a retrospective, US, multicenter chart review (October 2013-March 2017). Additional information regarding patients' liver disease was retrospectively collected for patients with PoPH in OPUS.</p><p><strong>Results: </strong>The OPUS/OrPHeUS dataset included 206 patients with PoPH (median age 58 years; 52.4% female), with baseline cirrhosis and liver test abnormalities reported in 72.8% and 31.6% of patients respectively. Macitentan was initiated as combination therapy in 74.8% of patients and median (Q1, Q3) exposure to macitentan was 11.9 (3.1, 26.0) months. One-year Kaplan-Meier estimates (95% confidence limit, CL) of patients free from all-cause hospitalization and survival were 48.6% (40.7, 56.0) and 82.2% (75.1, 87.4). Of the 96 patients with PoPH in OPUS, 29.2% were classified as in need of liver transplant due to underlying liver disease during the study; transplant waitlist registration was precluded because of PAH severity for 32.1% and 17.9% were transplanted. Hepatic adverse events (HAE) were experienced by 49.0% of patients; the most common being increased bilirubin (16.0%), ascites (7.3%), and hepatic encephalopathy (5.8%); 1.5% and 21.8% of patients discontinued macitentan as a result of HAE and non-hepatic adverse events.</p><p><strong>Conclusion: </strong>There were no unexpected safety findings in patients with PoPH treated with macitentan. These data add to the evidence supporting the safety and tolerability of macitentan in patients with PoPH. A graphical abstract is available with this article.</p><p><strong>Trial registration: </strong>OPsumit® Users Registry (OPUS): NCT02126943; OPsumit® Historical Users cohort (OrPHeUS): NCT03197688; www.</p><p><strong>Clinicaltrials: </strong>gov .</p>","PeriodicalId":20919,"journal":{"name":"Pulmonary Therapy","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10881949/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139111169","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pulmonary TherapyPub Date : 2024-03-01Epub Date: 2024-01-09DOI: 10.1007/s41030-023-00249-5
Herbert Wachtel, Rachel Emerson-Stadler, Peter Langguth, Jens M Hohlfeld, Jill Ohar
{"title":"Aerosol Plumes of Inhalers Used in COPD.","authors":"Herbert Wachtel, Rachel Emerson-Stadler, Peter Langguth, Jens M Hohlfeld, Jill Ohar","doi":"10.1007/s41030-023-00249-5","DOIUrl":"10.1007/s41030-023-00249-5","url":null,"abstract":"<p><strong>Introduction: </strong>The selection of inhaler device is of critical importance in chronic obstructive pulmonary disease (COPD) as the interaction between a patient's inhalation profile and the aerosol characteristics of an inhaler can affect drug delivery and lung deposition. This study assessed the in vitro aerosol characteristics of inhaler devices approved for the treatment of COPD, including a soft mist inhaler (SMI), pressurized metered-dose inhalers (pMDIs), and dry powder inhalers (DPIs).</p><p><strong>Methods: </strong>High-speed video recording was used to visualize and measure aerosol velocity and spray duration for nine different inhalers (one SMI, three pMDIs, and five DPIs), each containing dual or triple fixed-dose combinations of long-acting muscarinic receptor antagonists and long-acting β<sub>2</sub>-agonists, with or without an inhaled corticosteroid. Measurements were taken in triplicate at experimental flow rates of 30, 60, and 90 l/min. Optimal flow rates were defined based on pharmacopoeial testing requirements: 30 l/min for pMDIs and SMIs, and the rate achieving a 4-kPa pressure drop against internal inhaler resistance for DPIs. Comparison of aerosol plumes was based on the experimental flow rates closest to the optimal flow rates.</p><p><strong>Results: </strong>The Respimat SMI had the slowest plume velocity (0.99 m/s) and longest spray duration (1447 ms) compared with pMDIs (velocity: 3.65-5.09 m/s; duration: 227-270 ms) and DPIs (velocity: 1.43-4.60 m/s; duration: 60-757 ms). With increasing flow rates, SMI aerosol duration was unaffected, but velocity increased (maximum 2.63 m/s), pMDI aerosol velocity and duration were unaffected, and DPI aerosol velocity tended to increase, with a more variable impact on duration.</p><p><strong>Conclusions: </strong>Aerosol characteristics (velocity and duration of aerosol plume) vary by inhaler type. Plume velocity was lower and spray duration longer for the SMI compared with pMDIs and DPIs. Increasing experimental flow rate was associated with faster plume velocity for DPIs and the SMI, with no or variable impact on plume duration, whereas pMDI aerosol velocity and duration were unaffected by increasing flow rate.</p>","PeriodicalId":20919,"journal":{"name":"Pulmonary Therapy","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10881950/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139404220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}