نتایج جستجو برای: expiratory rib cage compression

تعداد نتایج: 129864  

Journal: :Journal of applied physiology 1982
S H Loring J Mead

Displacements of the rib cage are determined by the intrinsic passive properties of the rib cage, rib cage musculature, pleural and abdominal pressures, and the diaphragm. The diaphragm's mechanical actions on the rib cage are inferred from a force-balance analysis in which the diaphragm is seen to cause expansion of the rib cage by pulling cephalad at its insertions on the lower ribs (insertio...

2014
Toshio Doi Yoshihiro Matsumoto Osamu Tono Kiyoshi Tarukado Katsumi Harimaya Seiji Okada Kensuke Kubota Mitsumasa Hayashida Yukihide Iwamoto

BACKGROUND Right thoracic curvature, rib cage deformities and aortic left shift are features of adolescent idiopathic scoliosis that are correlated with each other. We recently reported that disturbance of ribcage development results in progressive thoracic scoliosis in mice. Recently, it has been confirmed that the normal spine exhibits right thoracic curvature and rib cage deformities and tha...

2015
Ghazi Elshafie Andrea Aliverti Ludovica Pippa Prem Kumar Maninder Kalkat Babu Naidu

BACKGROUND The effect of chest wall tumours on chest wall mechanics is uncertain even less is known about the effects of resection and reconstruction. Our aim is to study how chest wall mechanics are altered in chest wall sarcoma and to determine the effect of chest wall reconstruction on chest wall kinetics. CASE PRESENTATION Using Optoelectronic Plethysmography (OEP), total and regional che...

Journal: :Journal of applied physiology 2004
Matteo Cappello André De Troyer

The abdominal muscles expand the rib cage when they contract alone. This expansion opposes the deflation of the lung and may be viewed as pressure dissipation. The hypothesis was raised, therefore, that alterations in rib cage elastance should affect the lung deflating action of these muscles. To test this hypothesis and evaluate the quantitative importance of this effect, we measured the chang...

Journal: :Respiratory Physiology & Neurobiology 2013
Danielle S.R. Vieira Mariana Hoffman Danielle A.G. Pereira Raquel R. Britto Verônica F. Parreira

Optoelectronic plethysmography (OEP) has been used to measure changes in chest wall volume and its compartments. However, literature lacks research on its reliability. The purpose of this study was to evaluate the intra-rater and inter-rater reliability of OEP. Thirty-two healthy subjects were evaluated at rest and during submaximal exercise on a cycle ergometer. The following variables were as...

Journal: :Physiological reviews 2005
André De Troyer Peter A Kirkwood Theodore A Wilson

The mechanical advantages of the external and internal intercostals depend partly on the orientation of the muscle but mostly on interspace number and the position of the muscle within each interspace. Thus the external intercostals in the dorsal portion of the rostral interspaces have a large inspiratory mechanical advantage, but this advantage decreases ventrally and caudally such that in the...

2015
Raffaele L. Dellaca Andrea Aliverti Antonella Lo Mauro Kenneth R. Lutchen Antonio Pedotti Bela Suki

In order to characterize the variability and correlation properties of spontaneous breathing in humans, the breathing pattern of 16 seated healthy subjects was studied during 40 min of quiet breathing using opto-electronic plethysmography, a contactless technology that measures total and compartmental chest wall volumes without interfering with the subjects breathing. From these signals, tidal ...

Journal: :Journal of applied physiology 2014
Stephen H Loring Negin Behazin Aileen Novero Victor Novack Stephanie B Jones Carl R O'Donnell Daniel S Talmor

Pneumoperitoneum for laparoscopic surgery is known to stiffen the chest wall and respiratory system, but its effects on resting pleural pressure in humans are unknown. We hypothesized that pneumoperitoneum would raise abdominal pressure, push the diaphragm into the thorax, raise pleural pressure, and squeeze the lung, which would become stiffer at low volumes as in severe obesity. Nineteen pred...

Journal: :Applied physiology, nutrition, and metabolism = Physiologie appliquee, nutrition et metabolisme 2016
Antonella LoMauro Ambra Cesareo Fiorenza Agosti Gabriella Tringali Desy Salvadego Bruno Grassi Alessandro Sartorio Andrea Aliverti

The objective of this study was to characterize static and dynamic thoraco-abdominal volumes in obese adolescents and to test the effects of a 3-week multidisciplinary body weight reduction program (MBWRP), entailing an energy-restricted diet, psychological and nutritional counseling, aerobic physical activity, and respiratory muscle endurance training (RMET), on these parameters. Total chest w...

Journal: :CMBBE: Imaging & Visualization 2016
Benjamin Aubert Claudio Vergari Brice Ilharreborde Aurélien Courvoisier Wafa Skalli

Rib cage 3D reconstruction is an important prerequisite for thoracic spine modelling, particularly for studies of the deformed thorax in adolescent idiopathic scoliosis. This study proposes a new method for rib cage 3D reconstruction from biplanar radiographs, using a statistical parametric model approach. Simplified parametric models were defined at the hierarchical levels of rib cage surface,...

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