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The First Affiliated Hospital of Nanjing Medical University

Weidong Gu

Shijiang Zhang

Ruiyuan Tang

Yangguang Yan

A recyclable and adjustable interventional stent for intravascular constriction. The stent main body is divided into three parts and shaped like a waist drum with expansion parts () being arranged on the upper and lower parts of the stent main body respectively for supporting and positioning. A variable aperture part () is arranged in the middle of the stent main body. The upper expansion part () is or is not provided with a coating; the middle variable aperture part () and the upper half part of the lower expansion part () are covered with a pericardium () subjected to anti-calcification treatment; and a metal wire ring () is passed through the lowermost edge of the stent. A compound conveying guide pipe is composed of an outer sheath () and a core (). The core () is a hollow pipe and a wire hanging groove is arranged on the outer side wall of the tip of the pipe to hang the metal wire ring () of the lowermost edge of the stent. A fixing bolt () on the outer sheath () is used for fixing the relative position between the outer sheath () and the core (). The stent is used to replace conventional pulmonary artery banding as, adhesion not being formed around the heart and major vessels and pulmonary stenosis not being formed, difficulties during radical surgery are not increased.

Recyclable and adjustable interventional stent for intravascular constriction

Disclosed is a non-grid-connected wind turbine generator system with high power, low cost and high efficiency. The wind turbine generator system includes a wind rotor, a generator and a tower. The wind rotor is a fixed-pitch variable-rotation-speed wind rotor, the wind rotor shaft directly drives a rotor of the generator, and the generator is a power-controlled DC generator, a double-salient brushless DC generator, or a double-stator double-salient brushless DC generator. The rotation speed of the fixed-pitch wind rotor is directly controlled by a power-controlled generator and thereby the attack angle of wind rotor blade is controlled. When wind speed is greater than rated wind speed of the system, the wind rotor is controlled into a state of blade stall so as to limit power output of the wind rotor and effectively broaden the wind speed range of wind rotor.

Growing community of inventors

Jiangsu, China

Weidong Gu