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Abbasi A, Ahmad K, Ferguson C, Soriano A, Calmelat R, Rossiter HB, Casaburi R, Stringer WW, Porszasz J. Lack of effect of an in-line filter on cardiopulmonary exercise testing variables in healthy subjects. Eur J Appl Physiol 2024; 124:1027-1036. [PMID: 37803179 DOI: 10.1007/s00421-023-05327-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Accepted: 09/20/2023] [Indexed: 10/08/2023]
Abstract
PURPOSE Pathogen transmission during cardio-pulmonary exercise testing (CPET) is caused by carrier aerosols generated during respiration. METHODS Ten healthy volunteers (age range: 34 ± 15; 4 females) were recruited to see if the physiological reactions to ramp-incremental CPET on a cycle ergometer were affected using an in-line filter placed between the mouthpiece and the flow sensor. The tests were in random order with or without an in-line bacterial/viral spirometer filter. The work rate aligned, time interpolated 10 s bin data were compared throughout the exercise period. RESULTS From rest to peak exercise, filter use increased only minute ventilation ([Formula: see text]E) (Δ[Formula: see text]E = 1.56 ± 0.70 L/min, P < 0.001) and tidal volume (VT) (ΔVT = 0.10 ± 0.11 L, P = 0.014). Over the entire test, the slope of the residuals for [Formula: see text]CO2 was positive (0.035 ± 0.041 (ΔL/L), P = 0.027). During a ramp-incremental CPET in healthy subjects, an in-line filter increased [Formula: see text]E and VT but not metabolic rate. CONCLUSION In conclusion, using an in-line filter is feasible, does not affect appreciably the physiological variables, and may mitigate risk of aerosol dispersion during CPET.
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Affiliation(s)
- Asghar Abbasi
- Division of Respiratory and Critical Care Physiology and Medicine, Department of Medicine, The Lundquist Institute for Biomedical Innovation at Harbor-UCLA Medical Center, 1124 W Carson St, CDCRC Building, Torrance, CA, 90502, USA.
| | - Khadije Ahmad
- Division of Cardiology, Department of Medicine, The Lundquist Institute for Biomedical Innovation at Harbor-UCLA Medical Center, Torrance, CA, USA
| | - Carrie Ferguson
- Division of Respiratory and Critical Care Physiology and Medicine, Department of Medicine, The Lundquist Institute for Biomedical Innovation at Harbor-UCLA Medical Center, 1124 W Carson St, CDCRC Building, Torrance, CA, 90502, USA
| | - April Soriano
- Division of Respiratory and Critical Care Physiology and Medicine, Department of Medicine, The Lundquist Institute for Biomedical Innovation at Harbor-UCLA Medical Center, 1124 W Carson St, CDCRC Building, Torrance, CA, 90502, USA
| | - Robert Calmelat
- Division of Respiratory and Critical Care Physiology and Medicine, Department of Medicine, The Lundquist Institute for Biomedical Innovation at Harbor-UCLA Medical Center, 1124 W Carson St, CDCRC Building, Torrance, CA, 90502, USA
| | - Harry B Rossiter
- Division of Respiratory and Critical Care Physiology and Medicine, Department of Medicine, The Lundquist Institute for Biomedical Innovation at Harbor-UCLA Medical Center, 1124 W Carson St, CDCRC Building, Torrance, CA, 90502, USA
| | - Richard Casaburi
- Division of Respiratory and Critical Care Physiology and Medicine, Department of Medicine, The Lundquist Institute for Biomedical Innovation at Harbor-UCLA Medical Center, 1124 W Carson St, CDCRC Building, Torrance, CA, 90502, USA
| | - William W Stringer
- Division of Respiratory and Critical Care Physiology and Medicine, Department of Medicine, The Lundquist Institute for Biomedical Innovation at Harbor-UCLA Medical Center, 1124 W Carson St, CDCRC Building, Torrance, CA, 90502, USA
| | - Janos Porszasz
- Division of Respiratory and Critical Care Physiology and Medicine, Department of Medicine, The Lundquist Institute for Biomedical Innovation at Harbor-UCLA Medical Center, 1124 W Carson St, CDCRC Building, Torrance, CA, 90502, USA
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Vinetti G, Micarelli A, Falla M, Randi A, Dal Cappello T, Gatterer H, Brugger H, Strapazzon G, Rauch S. Surgical masks and filtering facepiece class 2 respirators (FFP2) have no major physiological effects at rest and during moderate exercise at 3000-m altitude: a randomised controlled trial. J Travel Med 2023; 30:taad031. [PMID: 36881665 PMCID: PMC10481409 DOI: 10.1093/jtm/taad031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 02/21/2023] [Accepted: 02/24/2023] [Indexed: 03/09/2023]
Abstract
BACKGROUND During the COVID-19 pandemic, the use of face masks has been recommended or enforced in several situations; however, their effects on physiological parameters and cognitive performance at high altitude are unknown. METHODS Eight healthy participants (four females) rested and exercised (cycling, 1 W/kg) while wearing no mask, a surgical mask or a filtering facepiece class 2 respirator (FFP2), both in normoxia and hypobaric hypoxia corresponding to an altitude of 3000 m. Arterialised oxygen saturation (SaO2), partial pressure of oxygen (PaO2) and carbon dioxide (PaCO2), heart and respiratory rate, pulse oximetry (SpO2), cerebral oxygenation, visual analogue scales for dyspnoea and mask's discomfort were systematically investigated. Resting cognitive performance and exercising tympanic temperature were also assessed. RESULTS Mask use had a significant effect on PaCO2 (overall +1.2 ± 1.7 mmHg). There was no effect of mask use on all other investigated parameters except for dyspnoea and discomfort, which were highest with FFP2. Both masks were associated with a similar non-significant decrease in SaO2 during exercise in normoxia (-0.5 ± 0.4%) and, especially, in hypobaric hypoxia (-1.8 ± 1.5%), with similar trends for PaO2 and SpO2. CONCLUSIONS Although mask use was associated with higher rates of dyspnoea, it had no clinically relevant impact on gas exchange at 3000 m at rest and during moderate exercise, and no detectable effect on resting cognitive performance. Wearing a surgical mask or an FFP2 can be considered safe for healthy people living, working or spending their leisure time in mountains, high-altitude cities or other hypobaric environments (e.g. aircrafts) up to an altitude of 3000 m.
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Affiliation(s)
- Giovanni Vinetti
- Institute of Mountain Emergency Medicine, Eurac Research, Bolzano, Italy
| | | | - Marika Falla
- Institute of Mountain Emergency Medicine, Eurac Research, Bolzano, Italy
- Center for Mind/Brain Sciences (CIMeC), University of Trento, Rovereto (TN), Italy
- Department of Neurology, General Hospital of Bolzano, Bolzano, Italy
| | - Anna Randi
- Institute of Mountain Emergency Medicine, Eurac Research, Bolzano, Italy
- Center for Mind/Brain Sciences (CIMeC), University of Trento, Rovereto (TN), Italy
| | - Tomas Dal Cappello
- Institute of Mountain Emergency Medicine, Eurac Research, Bolzano, Italy
| | - Hannes Gatterer
- Institute of Mountain Emergency Medicine, Eurac Research, Bolzano, Italy
- Institute for Sports Medicine, Alpine Medicine and Health Tourism (ISAG), UMIT TIROL-Private University for Health Sciences and Health Technology, Hall in Tirol, Austria
| | - Hermann Brugger
- Institute of Mountain Emergency Medicine, Eurac Research, Bolzano, Italy
| | - Giacomo Strapazzon
- Institute of Mountain Emergency Medicine, Eurac Research, Bolzano, Italy
| | - Simon Rauch
- Institute of Mountain Emergency Medicine, Eurac Research, Bolzano, Italy
- Department of Anaesthesiology and Intensive Care Medicine, Hospital of Merano (SABES-ASDAA), Merano (BZ), Italy; Lehrkrankenhaus der Paracelsus Medizinischen Privatuniversität
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Brooks JP, Layman J, Willis J. Physiologic effects of surgical masking in children versus adults. PeerJ 2023; 11:e15474. [PMID: 37342359 PMCID: PMC10278594 DOI: 10.7717/peerj.15474] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Accepted: 05/07/2023] [Indexed: 06/22/2023] Open
Abstract
Background Surgical masks remain a focal part of the CDC guidelines to decrease COVID-19 transmission. Evidence refuting significant effects of masking on ventilation is mostly limited to small studies, with a paucity of studies on children, and none comparing children to adults. Methods A total of 119 subjects were enrolled (71 adults, 49 children) in a prospective interventional study with each subject serving as their own mask-free control. End tidal CO2 (ETCO2), inspired CO2 (ICO2), and respiratory rate were measured by nasal cannula attached to an anesthesia machine D-fend module. Pulse oximetry and heart rate were also followed. After the mask-free period, an ASTM Level 3 disposable surgical mask was donned and 15 min of mask-worn data were collected. Results A steady state was confirmed for ETCO2 and ICO2 over the masked period, and mean ICO2 levels rose significantly (p < 0.001) after masking in all age groups. The increase in ICO2 for the 2- to 7-year-old group of 4.11 mmHg (3.23-4.99), was significantly higher (p < 0.001) than the final ΔICO2 levels for both the 7- to 14-year-old group, 2.45 mmHg (1.79-3.12), and adults, 1.47 mmHg (1.18-1.76). For the pediatric group there was a negative, significant correlation between age and ΔICO2, r = -0.49, p < 0.001. Masking resulted in a statistically significant (p < 0.01) rise in ETCO2 levels of 1.30 mmHg in adults and 1.36 mmHg in children. The final respective ETCO2 levels, 34.35 (33.55-35.15) and 35.07 (34.13-36.01), remained within normal limits. Pulse oximetry, heart rate, and respiratory rate were not significantly affected. Discussion The physiology of mechanical dead space is discussed, including the inverse relationship of subject age vs ICO2. The methodology and results are compared to previously published studies which detracted from the physiologic safety of surgical masking. Conclusions The wearing of a surgical mask results in a statistically significant rise in ICO2 and a smaller rise in ETCO2. Because ETCO2 and other variables remain well within normal limits, these changes are clinically insignificant.
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Affiliation(s)
- J Patrick Brooks
- School of Anesthesia, Missouri State University, Springfield, Missouri, United States
- Department of Biomedical Sciences, Missouri State University, Springfield, Missouri, United States
| | - Jill Layman
- School of Anesthesia, Missouri State University, Springfield, Missouri, United States
| | - Jessica Willis
- RStats Institute, Missouri State University, Springfield, Missouri, USA
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Zheng C, Poon ETC, Wan K, Dai Z, Wong SHS. Effects of Wearing a Mask During Exercise on Physiological and Psychological Outcomes in Healthy Individuals: A Systematic Review and Meta-Analysis. Sports Med 2023; 53:125-150. [PMID: 36001290 PMCID: PMC9400006 DOI: 10.1007/s40279-022-01746-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/29/2022] [Indexed: 01/12/2023]
Abstract
BACKGROUND Wearing face masks in public is an effective strategy for preventing the spread of viruses; however, it may negatively affect exercise responses. Therefore, this review aimed to explore the effects of wearing different types of face masks during exercise on various physiological and psychological outcomes in healthy individuals. METHODS A literature search was conducted using relevant electronic databases, including Medline, PubMed, Embase, SPORTDiscus, Web of Science, and Cochrane Central Register of Controlled Trials on April 05, 2022. Studies examining the effect of mask wearing (surgical mask, cloth mask, and FFP2/N95 respirator) during exercise on various physiological and psychological parameters in apparently healthy individuals were included. For meta-analysis, a random effects model was used. Mean difference (MD) or standardized MD (SMD) with 95% confidence intervals (CI) were calculated to analyze the total effect and the effect in subgroups classified based on face mask and exercise types. The quality of included studies was examined using the revised Cochrane risk-of-bias tool. RESULTS Forty-five studies with 1264 participants (708 men) were included in the systematic review. Face masks had significant effects on gas exchange when worn during exercise; this included differences in oxygen uptake (SMD - 0.66, 95% CI - 0.87 to - 0.45), end-tidal partial pressure of oxygen (MD - 3.79 mmHg, 95% CI - 5.46 to - 2.12), carbon dioxide production (SMD - 0.77, 95% CI - 1.15 to - 0.39), and end-tidal partial pressure of carbon dioxide (MD 2.93 mmHg, 95% CI 2.01-3.86). While oxygen saturation (MD - 0.48%, 95% CI - 0.71 to - 0.26) decreased slightly, heart rate was not affected. Mask wearing led to higher degrees of rating of perceived exertion, dyspnea, fatigue, and thermal sensation. Moreover, a small effect on exercise performance was observed in individuals wearing FFP2/N95 respirators (SMD - 0.42, 95% CI - 0.76 to - 0.08) and total effect (SMD - 0.23, 95% CI - 0.41 to - 0.04). CONCLUSION Wearing face masks during exercise modestly affected both physiological and psychological parameters, including gas exchange, pulmonary function, and subjective discomfort in healthy individuals, although the overall effect on exercise performance appeared to be small. This review provides updated information on optimizing exercise recommendations for the public during the COVID-19 pandemic. SYSTEMATIC REVIEW REGISTRATION NUMBER This study was registered in the International Prospective Register of Systematic Review (PROSPERO) database (registration number: CRD42021287278).
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Affiliation(s)
- Chen Zheng
- Department of Sports Science and Physical Education, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Eric Tsz-Chun Poon
- Department of Sports Science and Physical Education, The Chinese University of Hong Kong, Hong Kong SAR, China
- Department of Health and Physical Education, The Education University of Hong Kong, Hong Kong SAR, China
| | - Kewen Wan
- Department of Sports Science and Physical Education, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Zihan Dai
- Department of Sports Science and Physical Education, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Stephen Heung-Sang Wong
- Department of Sports Science and Physical Education, The Chinese University of Hong Kong, Hong Kong SAR, China.
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Chen X, Zhang C, Ibrahim S, Tao S, Xia X, Li Y, Li C, Yue F, Wang X, Bao S, Fan J. The impact of facemask on patients with COPD: A systematic review and meta-analysis. Front Public Health 2022; 10:1027521. [PMID: 36466486 PMCID: PMC9709116 DOI: 10.3389/fpubh.2022.1027521] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Accepted: 10/17/2022] [Indexed: 11/17/2022] Open
Abstract
Background Since the emergence of COVID-19, mandatory facemask wearing has been implemented around the world to prevent viral transmission, however, the impact of wearing facemasks on patients with COPD was unclear. Methods The current study undertakes a systematic review and meta-analysis of a comprehensive literature retrieval from six databases, based on the pre-determined eligibility criteria, irrespective of language. The risk of bias was assessed using an established instrument. We primarily focused on analyzing ETCO2, SpO2, and heart and respiratory rates, and also considered the impacts on physiological and exercise performance. A descriptive summary of the data and possible meta-analysis was performed. Forest plots were generated to pool estimates based on each of the study outcomes. Results Of the 3,751 publications considered, six publications were selected for a systematic review and two publications were included for meta-analysis, however, the quality of these six studies was relatively low overall. In the case of inactivity, the facemask wearing COPD cohort had higher respiratory rates than that of the non-facemask wearing cohort (MD = 1.00 and 95% CI 0.47-1.53, P < 0.05). There was no significant difference in ETCO2 (MD = 0.10 and 95% CI -1.57-1.78, P > 0.05) and heart rate (MD = 0.40 and 95% CI -3.59-4.39, P > 0.05) nor SpO2 (MD = -0.40 and 95% CI -0.84-0.04, P > 0.05) between the COPD patients with and without facemasks. Furthermore, it was observed that the only significant differences between the COPD patients with and without facemasks undertaking different activities were FEV1 (%) (MD = 3.84 and 95% CI 0.14-7.54, P < 0.05), FEV1/FVC (%) (MD = 3.25 and 95% CI 0.71-5.79, P < 0.05), and blood lactate (MD = -0.90 and 95% CI -1.73 to -0.07, P < 0.05). Conclusion Wearing facemasks decreased the exercise performance of patients with COPD, however, it had minimal impact on physiological indexes. Further investigations will be performed on the high-quality data from randomized control studies. Systematic review registration https://www.crd.york.ac.uk/PROSPERO/display_record.php?RecordID=326265, identifier: CRD42022326265.
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Affiliation(s)
- Xuwen Chen
- School of Public Health, Center for Laboratory and Simulation Training, Centre for Evidence-Based Medicine, Gansu University of Chinese Medicine, Lanzhou, China
| | - Changqing Zhang
- Department of Radiology, Gansu Provincial People's Hospital, Lanzhou, China
| | - Sani Ibrahim
- School of Public Health, Center for Laboratory and Simulation Training, Centre for Evidence-Based Medicine, Gansu University of Chinese Medicine, Lanzhou, China
| | - Shunyu Tao
- School of Public Health, The University of Sydney, Camperdown, NSW, Australia
| | - Xiaoli Xia
- Department of Geriatrics, Affiliated Hospital of Gansu University of Chinese Medicine, Lanzhou, China
| | - Yi Li
- Department of Respiratory Cadres, Gansu Provincial People's Hospital, Lanzhou, China
| | - Caiyun Li
- School of Public Health, Center for Laboratory and Simulation Training, Centre for Evidence-Based Medicine, Gansu University of Chinese Medicine, Lanzhou, China
| | - Feiyan Yue
- School of Public Health, Center for Laboratory and Simulation Training, Centre for Evidence-Based Medicine, Gansu University of Chinese Medicine, Lanzhou, China
| | - Xinhua Wang
- School of Public Health, Center for Laboratory and Simulation Training, Centre for Evidence-Based Medicine, Gansu University of Chinese Medicine, Lanzhou, China,Xinhua Wang
| | - Shisan Bao
- School of Public Health, Center for Laboratory and Simulation Training, Centre for Evidence-Based Medicine, Gansu University of Chinese Medicine, Lanzhou, China,Shisan Bao
| | - Jingchun Fan
- School of Public Health, Center for Laboratory and Simulation Training, Centre for Evidence-Based Medicine, Gansu University of Chinese Medicine, Lanzhou, China,*Correspondence: Jingchun Fan
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Amirav I, Lavie M. Spurious Asthma Presentation during COVID-19. CHILDREN 2021; 9:children9010005. [PMID: 35053630 PMCID: PMC8774193 DOI: 10.3390/children9010005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 12/12/2021] [Accepted: 12/15/2021] [Indexed: 11/19/2022]
Abstract
The use of face masks as a means for preventing the spread of SARS-CoV-2 is now a common practice world-wide. Three children presented to our specialty clinic with respiratory complaints during protective face mask wearing. They were diagnosed as asthma and referred to our specialist clinic for further evaluation after asthma treatments were ineffective. Full details and a video clip demonstrating the effects of wearing the mask is presented for the first patient. The detailed evaluation confirmed the diagnosis of hyperventilation. Conclusions: In the current era of the daily use of masks, pediatricians should be aware of potential anxiety and hyperventilation while the mask is being worn, causing symptoms that mimic common respiratory disorders, such as asthma.
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