RU68876U1 - ASPIRATION CARTRIDGE SYRINGE WITH ORIGINAL REMOVABLE ADAPTER FOR NEEDLES WITH PASSIVE ASPIRATION SYSTEM - Google Patents

Abstract

In order to simplify aspiration, which does not require retraction of the piston and changing the position of the operator’s arm, and to increase the safety of anesthesia by preventing toxic reactions caused by accidental contact of the needle and local anesthetic in the lumen of the vessel, the authors propose an aspiration cartridge syringe with an original removable adapter for needles with passive aspiration system.

The aspiration cartridge syringe with an original removable adapter for needles with a passive aspiration system is made of steel used for the production of dental instruments.

A feature of the proposed original removable adapter for needles with a passive aspiration system for the cartridge syringe is a tubular pin located on the outer surface of the cylindrical sleeve of the removable adapter and protruding into the interior of the syringe body.

After the adapter is screwed in, the cartridge is installed, the diaphragm is pierced by a needle. When pressing on the piston plug, the tubular pin deforms the diaphragm of the cartridge, creating a positive pressure. At the moment of stopping the pressure on the pusher, the diaphragm straightens, and negative pressure occurs in the cartridge, due to which liquid is aspirated from the injection site tissues and blood appears in the cartridge if the needle accidentally enters a blood vessel.

Description

The utility model relates to medicine, namely to therapeutic, orthopedic, orthodontic, surgical dentists.

A positive aspiration test consists in the appearance of blood when negative pressure is created in the body of the syringe or cartridge immediately after the needle is inserted into the tissue. It is an essential part of an injection. A positive test demonstrates a needle entering a blood vessel and helps to eliminate the rapid intravascular administration of a local anesthetic, which can cause severe toxic complications.

As a prototype of a useful model, the authors propose an aspiration cartridge dental syringe, which contains a housing in which the cartridge is placed, a piston pusher with an emphasis for fingers, additional retention devices in the form of a harpoon, serrations, screw, which serve to connect the pusher with the cartridge piston and stopper designed for active aspiration, as well as a removable screw-threaded adapter for fixing injection needles, screwed onto the front of the outer surface of the syringe body.

The removable adapter for the cartridge syringe is a four-piece cylindrical adapter 11 mm long and 8 mm in diameter, including: a cylindrical protrusion with thread for fixing needles 4 mm long and 6 mm in diameter for European and 5 mm for American standard needles ; a ring with finger notches with a height of 3 mm and a diameter of 10 mm, is intended for the convenience of screwing the inside of the adapter into the body of the dental syringe; a cylindrical sleeve with a screw thread for connection to the front of the syringe body, 4 mm high, 8 mm in diameter. The needle channel is represented by a through hole with an inner diameter of 1 mm extending centrally along the entire length of the removable adapter. // Bizyaev A.F., Ivanov S.Yu., Lepilin A.V., Rabinovich S.A. Anesthesia in a dental clinic. - M., GOU VUNMTS Ministry of Health of the Russian Federation., 2002, - 144 p. //

Some disadvantages of the removable adapter, according to the authors, are:

- with a traditional adapter, it is impossible to perform aspiration without the use of additional retention devices in the form of a harpoon, notches, screw, which serve to connect the pusher with the piston-plug of the cartridge;

- the cartridge piston-tube requires the use of special channels for coupling with the retention devices of the cartridge syringe.

The authors propose an aspiration cartridge syringe with an original removable adapter for needles with a passive aspiration system (Fig. 1), which is a 12 mm diameter cylindrical adapter with a diameter of 8 mm, consisting of five parts and including: a cylindrical protrusion of 4 mm length and 5 mm diameter ; a ring with finger notches with a height of 3 mm and a diameter of 10 mm, is intended for the convenience of screwing the inside of the adapter into the body of the dental syringe; a cylindrical sleeve with a screw thread for connection to the front of the syringe body, 3 mm high, 8 mm in diameter; on the cylindrical sleeve of the removable adapter is a hollow tubular pin with a length of 2 mm and a diameter of 2.5 mm. The needle channel is represented by a through hole with an inner diameter of 1 mm extending centrally along the entire length of the removable adapter, including the tubular protrusion.

After the adapter is screwed in, the cartridge is installed, the diaphragm is pierced by a needle. When pressing on the piston plug, the tubular pin deforms the diaphragm of the cartridge, creating a positive pressure. At the moment of stopping the pressure on the pusher, the diaphragm straightens, and negative pressure occurs in the cartridge, due to which liquid is aspirated from the injection site tissues and blood appears in the cartridge if the needle accidentally enters a blood vessel.

The advantages of the proposed original removable adapter for needles with a passive aspiration system are:

- the presence of a tube pin in the adapter allows passive aspiration;

- increases the safety of anesthesia;

- prevents toxic reactions caused by accidental hit of a needle in the lumen of a vessel;

- the tubular pin simplifies suctioning, as it does not require retraction of the piston without changing the position of the operator’s arm during injection.

Claims (1)

Aspiration cartridge syringe with an original removable adapter for needles with a passive aspiration system, consisting of a housing with a cartridge, a piston pusher with an emphasis for fingers, additional retention devices in the form of a harpoon, notches, a screw and a removable adapter with a screw thread, characterized in that the removable adapter It is an adapter of a cylindrical shape 12 mm long with a diameter of 8 mm with a through needle channel with an inner diameter of 1.0 mm running along the entire length, with a cylindrical protrusion with a screw thread 4 mm long Diameter 5 mm, a notched ring finger height of 3 mm to 10 mm in diameter, a cylindrical sleeve with a screw thread height of 3 mm of 8 mm diameter and the hollow tubular pin 2 mm long 2.5 mm diameter.