Pulmonary rehabilitation

Spruit, Martijn A.

doi:10.1183/09059180.00008013

Cited by 75 publications

(78 citation statements)

References 152 publications

(103 reference statements)

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“…For nucleosynthesis of H and He burning, 51 isotopes up to Si are included, and after He burning 240 isotopes up to Ge are included. 1 Schwartzshild criterion is adopted for convective stability criterion and diffusive convective mixing by Spruit (1992) is adopted. In this work, a case for relatively slow mixing, f k = 0.05 (Saio & Nomoto 2000), is investigated.…”

Section: Code and Methodsmentioning

confidence: 99%

Evolution and Nucleosynthesis of Metal-Free Massive Stars

Umeda¹,

Nomoto²,

Nakamura

Eso Astrophysics Symposia

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We calculate presupernova evolutions and supernova explosions of massive stars (M = 13 − 25M ) for various metallicities. We find the following characteristic abundance patterns of nucleosynthesis in the metal-free (Pop III) stars. (1) The α-nuclei (from C to Zn) are more efficiently produced than other isotopes, and the abundance pattern of α-nuclei can be similar to the solar abundance. In particular, near solar ratios of alpha elements/Fe might be a signature of Pop III which could produce a large amount of Fe. (2) The abundance ratios of odd Z to even Z elements such as Na/Mg and Al/Mg become smaller for lower metallicity. However, these ratios almost saturate below Z ∼ < 10 −5 , and [Na, Al/Mg] ∼ −1 for Pop III and low metal Pop II nucleosynthesis. This result is consistent with abundance pattern of metal poor stars, in which these ratios also saturate around −1. We suggest that these stars with the lowest (4) We also find that primary 14 N production occurs in the massive Pop III stars, because these stars have radiative H-rich envelopes so that the convective layer in the He-shell burning region can reach the H-rich region.

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Section: Code and Methodsmentioning

confidence: 99%

Evolution and Nucleosynthesis of Metal-Free Massive Stars

Umeda¹,

Nomoto²,

Nakamura

Eso Astrophysics Symposia

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“…To save computer time, we use a small nuclear reaction network up to magnesium. Convective mixing is treated diffusively adopting the effective diffusion coefficient derived by Spruit (1992). Although the coefficient was derived for semiconvective mixing (corresponding to the Schwarzschild type), it leads to a uniform chemical composition distribution in the fully convective zone.…”

Section: Methodsmentioning

confidence: 99%

A Millennium-long Evolution of the 1 yr Recurrence Period Nova—Search for Any Indication of the Forthcoming He Flash

Kato

Saio

Hachisu

2017

ApJ

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We present 1500 cycles of hydrogen shell flashes on a 1.38 M ⊙ white dwarf (WD) for a mass accretion rate of 1.6 × 10 −7 M ⊙ yr −1 , the mass ejection of which is calculated consistently with the optically thick winds. This model mimics the one-year-recurrence-period nova M31N 2008-12a. Through these hydrogen flashes a helium ash layer grows in mass and eventually triggers a helium nova outburst. Each hydrogen flash is almost identical and there is no precursor for the forthcoming He flash either in the outburst or in the quiescent until the next He flash suddenly occurs. Thus, M31N 2008-12a is a promising candidate of He novae, outbursting in any time within a millennium years. The prompt X-ray flash of He nova lasts as short as 15 min with the X-ray luminosity being about a half of the Eddington luminosity, making the observation difficult. In the very early phase of a He flash, the uppermost H-rich layer is convectively mixed into the deep interior and most of hydrogen is consumed by nuclear burning. In comparison with hydrogen shell flashes of M31N 2008-12a, we expect the forthcoming He nova with a very short prompt X-ray flash (15 min), a very bright optical/NIR peak (∼ 3.5 mag brighter than M31N 2008-12a), a much longer nova duration (> 2 years), and a longer supersoft X-ray source phase (40-50 days or more).

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“…Pulmonary rehabilitation is an internationally acknowledged intervention, which is shown to be effective to improve dyspnea, health status, and exercise tolerance (McCarthy et al, 2015). Multidisciplinary pulmonary rehabilitation programmes are wellestablished and consist of several components that can be used to meet the goals and needs of the individual patient (Spruit, 2014). Along with exercise training, most programmes comprise educational components with the purpose of both increasing knowledge and improving skills required for effective self-management (Spruit, 2014).…”

Section: Introductionmentioning

confidence: 99%

“…Multidisciplinary pulmonary rehabilitation programmes are wellestablished and consist of several components that can be used to meet the goals and needs of the individual patient (Spruit, 2014). Along with exercise training, most programmes comprise educational components with the purpose of both increasing knowledge and improving skills required for effective self-management (Spruit, 2014). However, there are several barriers to both partial and full participation in pulmonary rehabilitation programmes (Cassidy, Turnbull, Gardani, & Kirkwood, 2014;Cox, Oliveira, Lahham, & Holland, 2017;Keating, Lee, & Holland, 2011;Rochester et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Breathing through a troubled life – a phenomenological-hermeneutic study of chronic obstructive pulmonary disease patients’ lived experiences during the course of pulmonary rehabilitation

Simonÿ

Andersen

Bødtger

et al. 2019

International Journal of Qualitative Studies on Health and Well

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Purpose: Exploring real-life experiences of Chronic Obstructive Pulmonary Disease (COPD) patients during rehabilitation can contribute with new knowledge of what has significance for their participation and chance for improved health and well-being. Therefore, this study aims to gain in-depth knowledge of COPD patients' lived experiences while following standard pulmonary out-patient rehabilitation. Methods: Combined participant observations and interviews were conducted among 21 participants in pulmonary rehabilitation. A three-leveled phenomenological-hermeneutic interpretation was applied. Results: Living with COPD was challenging due to dyspnea and other physical troubles. This caused a lack of trust in the body and complicated rehabilitation participation. When improving management of breath during rehabilitation, the patients gained a new sense of trust in the body. This was accompanied by a nascent hope and increased well-being. However, not succeeding in this left patients with a persistent lack of hope. Conclusions: Comprehensive troubles in living with COPD paradoxically prevents patients' prospect of overcoming a perceived lack of trust in their body during standard pulmonary rehabilitation. Enhancing breath management has a significant impact on COPD patients' trust in own capabilities to improve well-being and health. Future rehabilitation must accommodate COPD patients' troubles by longer-lasting, well-coordinated, individually supportive and more easily accessible programmes.

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Pulmonary rehabilitation

Cited by 75 publications

References 152 publications

Evolution and Nucleosynthesis of Metal-Free Massive Stars

Evolution and Nucleosynthesis of Metal-Free Massive Stars

A Millennium-long Evolution of the 1 yr Recurrence Period Nova—Search for Any Indication of the Forthcoming He Flash

Breathing through a troubled life – a phenomenological-hermeneutic study of chronic obstructive pulmonary disease patients’ lived experiences during the course of pulmonary rehabilitation

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