Abstract: The present invention relates to a negative pressure generating device and an automatic negative pressure wound therapy device having a pressure changing function using the same. The present invention includes a static load elastic unit which provides an elastic force having a predetermined magnitude; a rotating unit which is connected to the static load elastic unit to rotate by the static load elastic unit; and a negative pressure cylinder which is connected to the rotating unit and interworks with the rotation of the rotating unit to generate a negative pressure therein. According to the present invention, a constant negative pressure may be consistently generated by a mechanical structure so that a manufacturing cost is significantly reduced as compared with an electrical structure and the size may be reduced.

Abstract: Provided is a medical aspirator including a hollow cylinder housing having a space therein, a piston slidable inside the cylinder housing in a longitudinal direction, and an elastic member having one end connected to the piston and the other end fixed to the cylinder housing, and allowing the piston to move in the longitudinal direction with a constant force, in which after the medical aspirator is installed in a surgical site, a constant suction pressure is maintained, so that side effects and accidents such as organ adhesion and tissue damage in a surgical site, resulting from an excessive pressure, are reduced, and body fluid in the surgical site is effectively discharged, so that the medical aspirator may contribute to shortening of a recovery period of a patient.

Abstract: The present invention relates to a negative pressure generating device and an automatic negative pressure wound therapy device having a pressure changing function using the same. The present invention includes a static load elastic unit which provides an elastic force having a predetermined magnitude; a rotating unit which is connected to the static load elastic unit to rotate by the static load elastic unit; and a negative pressure cylinder which is connected to the rotating unit and interworks with the rotation of the rotating unit to generate a negative pressure therein. According to the present invention, a constant negative pressure may be consistently generated by a mechanical structure so that a manufacturing cost is significantly reduced as compared with an electrical structure and the size may be reduced.

Abstract: Provided is a medical aspirator including a hollow cylinder housing having a space therein, a piston slidable inside the cylinder housing in a longitudinal direction, and an elastic member having one end connected to the piston and the other end fixed to the cylinder housing, and allowing the piston to move in the longitudinal direction with a constant force, in which after the medical aspirator is installed in a surgical site, a constant suction pressure is maintained, so that side effects and accidents such as organ adhesion and tissue damage in a surgical site, resulting from an excessive pressure, are reduced, and body fluid in the surgical site is effectively discharged, so that the medical aspirator may contribute to shortening of a recovery period of a patient.