2 results about "Heart bypass" patented technology

The invention discloses a heart bypass vein bridge exhaust needle which comprises a needle body, a needle handle is installed on the outer side of the top end of the needle body, the top end of the needle body is communicated with a connecting pipe, the bottom end of the needle body is sleeved with a flexible expansion block, a needle point is arranged at the end of the needle body, and the flexible expansion block is located above the needle point. The flexible expansion block comprises an arc-shaped involute face, the outer side of the arc-shaped involute face is sequentially provided with the arc-shaped involute face and a protruding face from bottom to top, and the top end of the protruding face is connected with an inclined protrusion. By arranging the flexible expansion block, the arc-shaped involute face, the protruding face and the inclined protrusion, after the needle point pierces the vein blood vessel wall of a patient, a puncture hole area on the blood vessel surface can gradually move from the arc-shaped involute face to the protruding face above the needle point, and is gradually supported by the arc-shaped involute face in the moving process; the needle hole is tightly attached to the outer side face of the flexible expansion block, and the problem of blood oozing caused by insufficient elasticity of the needle hole is solved.

The utility model relates to medical instrument technical field discloses heart bypass operation blood vessel fixing clamp, including the clamping plate, the inner wall sliding connection has rubber block in the clamping plate, the right side of clamping plate is provided with locking mechanism, locking mechanism is used for fixing clamping plate, avoids the loosening in clamping process, the front side of clamping plate is provided with replacement mechanism, replacement mechanism is used for replacement processing according to different size blood vessel, the locking mechanism includes the rack, the left end fixed connection in the inner wall left side of clamping plate of rack, the right side intercommunication of clamping plate has fixed box. In the utility model, through pressing clamping plate to blood vessel and clamping, at this time rubber block follows clamping plate and bends, simultaneously, the right end of rack passes through clamping plate and is connected in fixed box in sliding, through the pushing force of spring one under the top post, makes extrusion force act on rack, makes the close engagement of rack and tooth groove, realizes the locking processing of clamping plate.