We report a case of left upper trunk neuropraxia following an uneventful case of lumbar spine fixation and fusion performed in the prone position. The cause of the injury was believed to be a very tight endotracheal tube tie in addition to the patient`s head turned to one side; both caused a compression in the left supraclavicular region compressing the upper trunk of the brachial plexus. On li...

The local mechanical properties of DNA are believed to play an important role in their biological functions and DNA-based nanomechanical devices. Using a simple sphere-tip compression system, the local radial mechanical properties of DNA are systematically studied by changing the tip size. The compression simulation results for the 16 nm diameter sphere tip are well consistent with the experime...

The tensile deformation is the most common forming principle in sheet process, but there a new tube process—tube hydro-forging has been developed based on of compression deformation. In addition to instability problem, surface defect—thickness distortion—was found this paper, wall thickness distortion analyzed from point view mechanics and It revealed that low pressure hydroforming bending mome...

To achieve safe airway management, it is essential first to predict whether there will be difficulties in intubating or ventilating the patient's airway. An enlarged thyroid mass can produce a tracheal obstruction by compression or intraluminal invasion or both. We report two patients with thyroid cancer that obstructed the trachea by compression or invasion. There was no difficulty in endotrac...

Uniaxial compression studies are performed on 50-mm-diameter bundles of nominally vertical, intertwined carbon nanotubes grown via chemical vapor deposition from a photolithographically defined catalyst. The inhomogeneous microstructure is examined, demonstrating density and tube orientation gradients, believed to play a role in the unique periodic buckling deformation mechanism. Through in sit...

STUDY OBJECTIVES Because efforts to secure adequate arterial oxygenation during cardiac resuscitation are more important than efforts to promote CO(2) elimination, we investigated whether continuous transtracheal oxygenation (TTO) could represent a potentially simpler alternative to conventional positive-pressure ventilation with 100% O(2) through an endotracheal tube. DESIGN Controlled and r...

The square steel tube component has a beautiful appearance, simple joint connection, and it is widely available. However, the uneven distribution of effective constraints in cross-section hinders its application. A novel concrete-filled tubular column was tested under axial compression. There were 11 specimens [10 columns reinforced with rhombic stirrups 90-degree internal angle (SSSC specimens...