Mechanical impedance of the respiratory tract in divers before and after simulated deep dives

Neubauer, B; Mutzbauer, Till S.; Struck, N; Smith, Hans-Jürgen; Tetzlaff, Kay

doi:10.1007/s00421-005-0011-x

Cited by 3 publications

(2 citation statements)

References 28 publications

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“…EBC malondialdehyde levels were used as a biomarker of pulmonary oxidative stress [72]. Another study investigated leukotriene-B4 concentrations in EBC before and after simulated deep dives to show occupational hazard [73]. However, to our knowledge there have been no published studies about EBC cytokine concentration in occupational respiratory disease.…”

Section: Fig (1) Rtube™ Collection System (Respiratory Researchmentioning

confidence: 99%

Noninvasive Assessment of Cytokines in Occupational Respiratory Diseases

Akpinar‐Elci

Yücesoy²,

Elci³

et al. 2007

IAD

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A major goal in studying occupational respiratory diseases is to show relationships between occupational exposures and health outcomes. Due to the nature of these diseases, accurate, practical, and objective measurement techniques are needed in field investigations. Pulmonary function tests, such as spirometry, are important objective health outcome measures. However, they reflect the functional changes of the lung, often in relatively late stages, which may be irreversible. Direct monitoring of airways inflammations, in response to occupational exposures, are receiving an increasing attention since they may pick up inflammatory changes before the injury becomes irreversible. Invasive approaches such as bronchoalveolar lavage and bronchial biopsies have been used to assess airways inflammation: but these methods are not practical for use in occupational field investigations. Thus, much work has focused on the development of noninvasive methods for monitoring inflammation in occupational respiratory diseases. The three recent most commonly used noninvasive techniques in occupational respiratory diseases investigations are induced sputum, exhaled breath condensate, and nasal lavage. In this review, we discuss the practical application of these techniques, patents and cytokines measured with them. Since variation of cytokine genes contribute to the inflammatory processes, we briefly discuss the genetic polymorphisms on the expression of occupational respiratory diseases. Details of genetic polymorphism were beyond the focus of this review. Our primary focus was cytokines measured with these three noninvasive techniques in occupational respiratory investigations.

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Section: Fig (1) Rtube™ Collection System (Respiratory Researchmentioning

confidence: 99%

Noninvasive Assessment of Cytokines in Occupational Respiratory Diseases

Akpinar‐Elci

Yücesoy²,

Elci³

et al. 2007

IAD

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“…B. Husten, Schnupfen) " akute oder chronische Otitis " Schmerzen (z. B. Zephalgien, Ohrenschmerzen) " Angst vor dem Tauchgang [11,12]. Kalte Wassertemperaturen und große Tauchtiefen können jedoch zu Einschränkungen beitragen [13].…”

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Lungenfunktionsmessung bei Kindern vor und nach einem altersadaptierten SCUBA Tauchgang im Schwimmbad

Wollin¹,

Christmann²,

Kroker³

et al. 2011

Pneumologie

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Lung function changes in divers after a single deep helium-oxygen dive

Bao¹,

Yang²,

Fang³

et al. 2022

Diving Hyperb Med

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Introduction: This study measured pulmonary function in divers after a single helium-oxygen (heliox) dive to 80, 100, or 120 metres of sea water (msw). Methods: A total of 26 divers participated, of whom 15, five, and six performed a 80, 100, or 120 msw dive, respectively. While immersed, the divers breathed heliox and air, then oxygen during surface decompression in a hyperbaric chamber. Pulmonary function was measured twice before diving, 30 min after diving, and 24 h after diving. Results: At 30 min after the 80 msw dive the forced expiratory volume in 1 s (FEV1)/forced vital capacity (FVC) ratio and the maximum expiratory flow at 25% of vital capacity (MEF25) values decreased (89.2% to 87.1% and 2.57 L·s-1 to 2.35 L·s-1, P = 0.04, P = 0.048 respectively) but FEV1/FVC returned to the baseline values by 24 h post-dive. Other pulmonary indicators exhibited downward trends at 30 min after the dive, but statistical significance was lacking. Interestingly, though several parameters decreased after the 100 msw dive, statistical significance was not reached. After the 120 msw dive, the FEV1/FVC and MEF75 decreased (90.4% to 85.6% and 8.05 L·s-1 to 7.46 L·s-1, P = 0.01, P = 0.007). The relatively small numbers of subjects who dived to 100 and 120 msw depths may explain the inconsistent results. The subjects diving to 100 and 120 msw were more trained / skilled, but this would not explain the inconsistencies in results between these depths. Conclusions: We conclude that single deep heliox dives cause a temporary decrease in FEV1/FEV and MEF25 or MEF75, but these changes can recover at 24 h after the dive.

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Mechanical impedance of the respiratory tract in divers before and after simulated deep dives

Cited by 3 publications

References 28 publications

Noninvasive Assessment of Cytokines in Occupational Respiratory Diseases

Noninvasive Assessment of Cytokines in Occupational Respiratory Diseases

Lungenfunktionsmessung bei Kindern vor und nach einem altersadaptierten SCUBA Tauchgang im Schwimmbad

Lung function changes in divers after a single deep helium-oxygen dive

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