Rat diaphragm muscle has been used almost exclusively for the investigation in vitro of skeletal muscle metabolism. However, the diaphragm is a specialized muscle adapted to constant activity and, with respect to oxygen consumption (1) and oxidative metabolism, seems to occupy an intermediate position between constantly active heart muscle and intermittently active skeletal muscle (2, 3). Histo...

We analyzed a statistical model of diaphragm motion using regular principal component analysis (PCA) and generalized N-dimensional PCA (GND-PCA). First, we generate 4D MRI of respiratory motion from 2D MRI using an intersection profile method. We then extract semiautomatically the diaphragm boundary from the 4D-MRI to get subject-specific diaphragm motion. In order to build a general statistica...

BACKGROUND The influence of the diaphragm motion to the accuracy of postoperative lung function prediction after the lung resction is still debatable. METHODS Prospective study that included 27 patients who underwent a lung resection for cancer. Diaphragm movements were assessed radiographically and by ultrasonography before the operation and postoperatively, with the lung fully expanded. The...

In this study, the effects of mesa dimensions on sensor response in diaphragm-based Fabry-Perot fiber optic sensors (FOSs) were investigated detail. Mesa diaphragms, also called center-embossed have been discussed sufficiently literature, but effect thickness performance has not Moreover, there is no precise analytical solution for such diaphragms. For reason, diaphragms with different thicknes...

BACKGROUND AND METHODOLOGY Women have used the contraceptive diaphragm for decades. Although use has recently declined, the diaphragm may find a new role in STI/HIV and dual-prevention programmes when microbicides become available. We developed a questionnaire to examine seven provider issues identified as possible barriers to diaphragm use among advanced practice nurses (APNs) specialising in ...

Little is known about how pressure-support ventilation affects diaphragm performance because there is no direct measurement of diaphragm function in the clinical setting. An indicator of diaphragm performance or work is the product of diaphragm muscle shortening and intrathoracic pressure during inspiration. We studied the effect of pressure-support ventilation on diaphragm shortening, diaphrag...

290 Abstract— This paper aims to simulate dielectric elastomeric (DE) diaphragm for a micropump. First a theoretical study is done to compare the different actuation methods that are currently being used in this field. Then a circular DE diaphragm is modeled for a micropump. The material assumed for the micro diaphragm is 3M’s VHB 4910 (polyacrylic tapes available in the market). The thickness ...

INTRODUCTION Studies indicate that mechanically ventilated patients develop significant diaphragm muscle weakness, but the etiology of weakness and its clinical impact remain incompletely understood. We assessed diaphragm strength in mechanically ventilated medical ICU patients, correlated the development of diaphragm weakness with multiple clinical parameters, and examined the relationship bet...

Introduction. Recent work revealed the development of marked muscle fiber weakness in the diaphragm, but not in the non-respiratory latissimus dorsi, during thoracic surgery. To disentangle the molecular processes that underlie the development of diaphragm muscle fiber weakness during thoracic surgery, we studied changes in the gene expression profile. Methods. Serial biopsies from the diaphrag...