Abstract: Disclosed is a circular stapler. The circular stapler includes a head cover (100) formed in a tubular shape so that a space is defined therein, a cartridge (200) provided in one end of the head cover (100) to accommodate a staple therein, a staple drive (300) provided inside the head cover (100) to extrude the staple from the cartridge (200) while moving toward the cartridge (200), a sensor drive (400) provided inside the head cover (100) and configured to come into contact with the cartridge (200), and a pressure sensor (500) provided inside the head cover (200) to measure pressure applied to the cartridge (200) by receiving the pressure from the sensor drive (400).

Abstract: The present disclosure relates to an airbag including a vent hole. The airbag including a vent hole, according to the present disclosure, comprises: a protection means (100) mounted on a predetermined part of a user, and inflated when gas is injected therein, thereby protecting the user; a body part (200) inserted into the vent hole (150), which is formed in the protection means (100), so as to enable fluid to flow through the inner and outer sides of the protection means (100); an elastic body (300) closing the body part (200), and inflated by the pressure of the gas inside the protection means (100) when the gas is injected into the protection means (100); and an opening and closing means (400), which opens the body part (200) by tearing the inflated elastic body (300) after the user falls, so as to discharge, to the outside, the gas injected into the protection means (100).

Abstract: Disclosed is a circular stapler. The circular stapler includes a head cover (100) formed in a tubular shape so that a space is defined therein, a cartridge (200) provided in one end of the head cover (100) to accommodate a staple therein, a staple drive (300) provided inside the head cover (100) to extrude the staple from the cartridge (200) while moving toward the cartridge (200), a sensor drive (400) provided inside the head cover (100) and configured to come into contact with the cartridge (200), and a pressure sensor (500) provided inside the head cover (200) to measure pressure applied to the cartridge (200) by receiving the pressure from the sensor drive (400).