RU54514U1 - DEVICE FOR INTRA-VOCAL INTRODUCTION OF MEDICINES TO THE LOWER JAW - Google Patents

Abstract

A device for intraosseous administration of drugs contains an injection needle having a cannula with an internal thread inserted into the bone of the lower jaw by rotating it with a drill with which the injection needle is connected to the thread by means of a nozzle of the injection needle and a syringe connecting to the cannula of the injection needle with an internal thread by means of the cannula thread syringe, the solution from which enters the bone of the lower jaw as a result of the pressure of the piston moving due to the rotation of the screw handle and the piston screw, turn to which corresponds to a certain amount of the injected solution, providing a strict dosage of the injected drug.

Description

The utility model relates to medical equipment, namely, devices for intraosseous administration of drugs in the lower jaw and can be used in surgical dentistry in the treatment of destructive processes in the mandibular bone, as well as for performing intraosseous anesthesia.

To create the maximum local concentration of antibiotics in the pathological focus, a screw-threaded needle for intraosseous administration of drugs is proposed, which is screwed into the lower jaw bone manually [Bazhanov NN, Chikorin AK, Shalabaev OD Osteoperforation and intraosseous lavage in the treatment of acute lower jaw osteomyelitis. // Dentistry - 1985. - No. 3. - p. 44]. However, the proposed device does not provide a strictly dosed introduction of the drug into the pathological focus area, and the large diameter of the needle and the inability to clearly fix the axis of the needle at the time of screwing by hand cause an additional significant bone injury.

A device for intraosseous administration of drugs is proposed, which is a needle inserted into the bone by connecting it with a shank and a drill, as well as a syringe, with a finger pressure on the piston of which the solution enters the bone [Konobevtsev OF, Makienko MA, Berezhnoy V.P. The technique of intraosseous anesthesia in dentistry. // Dentistry. - 1978. - No. 4. - S.17-19]. The disadvantage of this device is

the inability to carry out strictly dosed administration of the drug with finger pressure on the piston and insufficiently rigid fixation of the nozzle cone in the needle cannula (screw), which often leads to the needle turning when it is inserted into the bone.

The goal achieved using the utility model is to ensure a strictly dosed injection of the drug into the lower jaw bone with minimal trauma.

This goal is achieved in that the device for intraosseous administration of drugs contains an injection needle having a cannula with a thread, a syringe representing a metal cylinder with a piston moving in it by rotating the screw with a thread in the fixing nut, a nozzle for fixing and introducing the injection needle into bone of the lower jaw with a drill.

Figure 1 shows a syringe for intraosseous administration of drugs and a nozzle for introducing an injection needle, general view;

The device for intraosseous administration of drugs into the lower jaw is made of stainless steel with chrome metal coating, and consists of an injection needle 1 with a cannula 2 having a thread on the inner surface, which allows connecting to the cannula of the syringe 6 by means of a thread 3, a syringe having a cylindrical body 9, located in its front part and fixed by means of a clamping nut 4 and a sealing ring 5 made of silicone, to the body of the syringe 9 of the cannula of the syringe 6, fixed through

a threaded connection at the rear of the syringe body 9 of the fixing nut 11, in the center of which there is a hole with a thread 12, in which the piston screw 10 with the piston 7 moves by thread, sealed and stabilized inside the syringe body 9 by a piston 8 sealing ring made of silicone and located on the back of the piston screw 10, with the handle of the piston screw 15, for inserting the injection needle 1 into the bone of the lower jaw, the nozzle of the injection needle 13 is used, including a threaded part 14 onto which the cannula is wound needle with an internal thread 2 before insertion of the needle in the lower jaw bone using a drill, and a coupling portion 18 corresponding to the shape of the tip of a drill lock.

The device operates as follows.

Under aseptic conditions, the injection needle 1 is screwed onto the threaded part 14 of the nozzle of the injection needle 13. The connecting part 18 of the nozzle of the injection needle 13 is fixed in the tip of the drill. After anesthesia of the site of future injection, a mucous membrane (with intraoral access) or skin (with extraoral access) is punctured until the tip of the needle comes into contact with the bone. With slight pressure on the tip of the drill and injection needle 1, at a low speed rotation of boron, injection needle 1 is passed through the cortical plate into the spongy layer of the bone, which is determined by its characteristic “failure”. The injection needle 1 is unscrewed from the threaded portion 14 of the nozzle for introducing the injection needle 13. The intraosseous syringe is being assembled

the introduction of drugs, which includes: installing through the lumen of the body of the syringe 9 the cannula of the syringe with the o-ring 5 and fixing it to the body of the syringe 9 by tightening the clamping nut 4 from the outside onto the thread; installation in the lumen of the body of the syringe 9 of the piston 7 with the sealing ring of the piston 8 located on the screw of the piston 10; closing the back of the housing and fixing the axis of movement of the piston screw 10 by screwing the fixing nut 11 onto the thread of the syringe body 16. After that, the thread of the syringe cannula 3 is screwed into the needle cannula with the internal thread 2, thereby achieving the alignment of the injection needle 1 with the intraosseous drug injection syringe . The implementation of intraosseous injection of drugs into the bone of the lower jaw is achieved by rotating the piston screw 15 and the piston screw 10 around the handle axis into the fixing nut 11. In this case, the movement of the piston screw 10 causes the piston 7 to move with the sealing ring 8, which exerts pressure on the fluid ( drug) located between the surface of the piston 7 and the inner surface of the cannula of the syringe 6. As a result of the applied pressure, the drug passes through the channel of the cannula of the syringe 17 into the injection onnuyu needle 1 and the cancellous bone of the lower jaw bone. Moreover, each full revolution of the handle of the piston screw 15 allows the piston 7 to be advanced a certain distance, which allows you to enter a strictly dosed volume of liquid. For example, with an internal diameter of the syringe of 16 mm and a screw pitch of 1.25 mm, 5 turns of the screw allows 1.3 ml to be introduced. solution.

The proposed device is collapsible, its parts are made of heat-resistant materials, which allows for sufficient sterilization. The device is compact, simple in design, easy to use. It was found that the proposed device allows for strictly dosed administration of drugs into the bone of the lower jaw.

Claims (1)

A device for intraosseous injection of drugs into the lower jaw, characterized in that it contains a nozzle for introducing an injection needle with a drill, a syringe with a piston located in the housing, moving due to rotation in the piston screw fixing nut, and an injection needle fixed on the thread of the syringe cannula and ensures strictly dosed injection of the drug into the lower jaw bone with minimal trauma.