Negative pressure suction type bone cement grouting device and method

Abstract

The invention discloses a negative pressure suction type bone cement grouting device and method. The negative pressure suction type bone cement grouting device comprises an inner cylinder, a middle cylinder and an outer cylinder, wherein a piston rod is arranged in the inner cylinder, the front end is provided with an inner needle tube, and the side wall of the middle cylinder is provided with a suction pipe connected with a vacuumizing device; the front end of the middle cylinder is provided with an external needle tube, the inner cylinder is fixed in the middle cylinder, and the inner needletube penetrates out of the external needle tube. The middle cylinder is sleeved by the outer cylinder to form a movable structure. By arranging the suction pipe connected with the vacuumizing deviceon the side wall of the middle cylinder to suck the air, bone powder, watery blood and blood clots at the bone part to be repaired, negative pressure formed in the inner cavity of the bone sucks the bone cement in the grouting device, so that the adverse consequence is avoided that the pressure produced by pushing the piston rod makes the bone cement seep from a bone crack to cause nerve compression. In addition, under the assistance of a manual pull structure and a rotary driving structure, the middle cylinder drives the inner cylinder to move backward, the push rod is fixed, bone cement grouting is achieved, a supplementing effect is played on the negative pressure grouting method, and a substitution effect can also be played when the negative pressure grouting method cannot be used.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a bone cement perfusion device and a perfusion method. Background technique [0002] During orthopedic surgery, for the fixation of artificial joints, the internal fixation of unstable fractures, etc., it is usually necessary to pour bone cement into the bone. Traditional bone cement injectors use positive pressure on the piston rod to push the bone cement to move in the filling direction. However, this way of pushing the piston rod in the front will form a large pressure, which will make the bone cement enter the repaired area. Uncontrolled flow behind the bone cavity. Since the general bone to be repaired will be accompanied by tiny bone cracks, under pressure, the bone cement is likely to seep out along the cracks, which may affect the nervous system and cause serious consequences. In addition, during surgery, the part to be repaired must first be drilled with instru...

AI Technical Summary

Problems solved by technology

Traditional bone cement injectors use positive pressure on the piston rod to push the bone cement to move in the filling direction. However, this way of pushing the piston rod in the front will form a large pressure, which will make the bone cement enter the repaired area. Uncontrolled flow behind the bone cavity

Because the general bones to be repaired will be accompanied by tiny bone cracks, under the action of pressure, the bone cement is likely to seep out along the cracks, which may affect the nervous system and cause serious consequences

In addition, during surgery, the part to be repaired must first be drilled with instruments, which will produce bone powder, blood, blood clots and other substances, which are difficult to clean with ordinary methods, and may flow to other parts and cause infection

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