Venous stasis associated with prolonged bed rest can enhance the risk of deep venous thrombosis (DVT). Pneumatic compression of the lower extremities can reduce this risk by preventing venous stasis. When selecting a method of leg compression for their patients, physicians must chose between two distinctly different types of compression devices. One device applies pressure with a single-chamber...

the pressure drop of refrigerant r-134a flow boiling inside a horizontal tube has been investigated experimentally. the test set-up which was used in this investigation is a well instrumented vapor compression refrigeration system. these instruments are thermocouples, flow meter, pressure gauges and the pressure drop measuring apparatus. this system consisted of three electrically heated evapor...

3D video can be represented by color 2D video sequence accompanied by gray-scale dense depth map (depth image) sequence. In this paper, we describe a novel method for intraframe compression of the depth modality of such representation. Our method takes into account specific features of depth images, i.e. the presence of large smooth regions delineated by sharp discontinuities (edges). For such ...

Cardiopulmonary resuscitation (CPR) has been thought to produce blood flow by compression of the heart between the sternum and spine, termed "external cardiac massage," but there has been-no direct experimental documentation of this proposed mechanism. Micromanometric pressure recordings were synchronized with cineangiograms during mechanical CPR in 17 dogs with induced ventricular fibrillation...

PURPOSE Tension band wiring is commonly used for fixation of simple transverse fractures. The popular configuration is parallel Kirschner wires (K-wires) and a stainless steel wire loop placed in a vertically oriented figure-of-8. METHODS We used a wooden model of a patella with a midway transverse fracture and compared four different types of fixation. The first construct had a vertical figu...