Abstract: A needle extracting and recovering device, the device is provided on the top of a case thereof with a needle insertion hole for insertion of a needle holder of a syringe with a needle to be extracted, an inclined rotation axle mechanism including a rotating knob is provided below the needle insertion hole, the rotation axle mechanism is provided on one lateral side thereof with a slit for inserting of the needle, the needle is extracted from the needle holder by rotating the rotating knob to rotate the rotation axle mechanism.

Abstract: A needle extracting and recovering device, the device is provided on the top of a case thereof with a needle insertion hole for insertion of a needle holder of a syringe with a needle to be extracted, an inclined rotation axle mechanism including a rotating knob is provided below the needle insertion hole, the rotation axle mechanism is provided on one lateral side thereof with a slit for inserting of the needle, the needle is extracted from the needle holder by rotating the rotating knob to rotate the rotation axle mechanism.

Abstract: A protecting cap structure for the needle of a syringe, wherein, the structure is provided with a protecting sleeve having a receiving space for receiving a needle. The protecting sleeve is comprised of a foldable cover and a cylindrical extendible member connected with each other; the cylindrical extendible member is a hollow cylinder, the shank of the cylindrical extendible member has a compression portion; a pair of foldable portions are provided in neighboring to the compression portion; the foldable cover is in the shape of a semi-cylinder, one end of the foldable cover is connected with the cylindrical extendible member, in order that when the cover is folded to close, it cooperates with the cylindrical extendible member to envelop and fast envelop the needle to prevent the needle from accident stabbing.

Abstract: An auxiliary device for placing a larynx cover for anesthetization, it comprises a handle, a fixing sleeve, a pushing rod and a soft sleeve. The pushing rod is a flexible and elongate metallic rod, has on an end thereof the soft sleeve, and has on its front end a forked opening and on its bottom a bottom poker; the other end of the pushing rod has a turning portion. When the handle are connected with the pushing rod, the flexible pushing rod is extended into an air inlet pipe of the larynx cover to abut against the bottom of the larynx cover and push it forwardly by means of the bottom poker, so that the forked opening of the soft sleeve abuts on a protrusion on an annular rubber pipe in the larynx cover. The handle and the air inlet pipe are firmly combined by the fixing sleeve, the larynx cover will not be departed from the auxiliary device; and the larynx cover can be in an arciform shape without an opening, it can fit the curvature of the throat and will not poke the root of a tong of a patient.

Abstract: Supraglottic airway (laryngeal mask) structure specifically used for anesthesia, including a silicone mask and a main tube seat with diverging tube opening. The main tube seat is fitted through the silicone mask. The upper and lower faces of the silicone mask are formed with perforations. A rubber annular tube having different diameters is implanted in the silicone mask at the equator thereof. A soft sleeve is fitted on the silicone mask. The inner diameter of the soft sleeve corresponds to the profile of the main tube seat. The soft sleeve has an irregular profile corresponding to the configuration of inner side of the fauces. The soft sleeve is pushed forward to make an upper tube opening of the main tube seat protrude out of the soft sleeve. An anesthetic gas intake tube having an engaging flange is fitted through the diverging section of the main tube seat and engaged therewith.

Abstract: A backflow proof structure for a syringe comprising a central cylinder portion and two blocks positioned in a protruding end of the syringe, on the bottom of the cylinder portion is a flared portion and on the top thereof is a tip, the outer space of the tip is filled with a piece of crystallized syrup to separate a crown cap covering the top of the tip from the cylinder portion; when the cylinder portion is placed in the protruding end, and a silicone cube is placed there-beneath, an irregular-shaped stopper is placed to closely contact the bottom of the protruding end to push the crown cap on the top of the cylinder portion out of the protruding end.