RU160804U1 - DEVICE FOR ADMINISTRATION OF MEDICINES - Google Patents

Abstract

A device for administering drugs containing a cylindrical body with finger rests on one side and an injection needle on the end of the body, on the other hand, a protective cap of a needle, characterized in that a rubber piston equipped with a metal rod is mounted inside the body to move it in turn, the injection needle is made with dimensions of 0.2 × 20 mm and is rigidly fixed at the end of the body.

Description

Device for administering drugs

The utility model relates to medical equipment and is intended for use in dentistry when performing certain types of anesthesia, such as subperiosteal, intraligamentary (varieties of infiltration anesthesia) and intra-pulp. The device can also be used in other fields of medicine, for example, surgery, for subcutaneous, intramuscular, intravenous, intraarticular and intraosseous injections of liquid drugs placed in ampoules or capsules used for injection. Also, the device can be used in patients with type I diabetes mellitus to administer insulin.

As you know, preparations for local anesthesia are available both in standard ampoules and in special ampoules, the so-called carpools, for example, drugs based on articaine. These drugs have a good anesthetic effect and the ability to diffuse through the bone tissue, which allows in most cases to refuse to perform the so-called classic standard anesthesia associated with various medical procedures on the teeth and organs of the oral cavity. Most often in dentistry, subperiosteal and intraligamentary anesthesia are used, which are a type of infiltration anesthesia, and intrapulpral anesthesia. To perform these types of anesthesia, a number of requirements are imposed on the syringe: a small thickness of the needle section, its length, a strong connection between the needle and the syringe, and a solid and stable rod. This is due to the fact that when performing the techniques of the above anesthesia, the doctor faces the difficulty of administering a local anesthetic, which is associated with an increase in pressure on the syringe rod. Overcoming the resistance to the injection of the drug into the injected area, and with excessive pressure, the needle “jumps off” from the syringe body. The doctor cannot “feel” the line between the excessive and permissible pressure force on the rod, therefore the needle “jumps off” from the syringe cannula.

Syringes are known from the prior art, for example, "Luer" [http://shpric.com/about], when used to increase the pressure at the outlet of the injection system, the force on the syringe rod is increased, and the greater the pressure on the rod, the higher flow rate at the exit, but because of the high resistance (initiated zone) at the exit, the needle often “jumps” from the joint. The greater the capacity of the syringe, the more pronounced is the effect of "jumping off" the needle. Since modern anesthetics have the good properties listed above, to achieve effective anesthesia when performing the above anesthesia, a fairly small amount of anesthetic is required - from 0.2 to 1 ml. Luer syringes are of little use for this, since they are available in 2 ml, 5 ml, 10 ml, 15 ml, 20 ml with needles - 0.6 × 25, 0.7 × 38, 0.8 × 38 mm.

Also known are syringe syringes having the following components: karpulu (cartridge) with anesthetic solution, double-edged needle, injector, finger rest, rod stop, protective cap [http://shpric.com/products/syringe-aers/infografika ]. The disadvantage of such syringes is that they are designed only for the use of carpules.

As a prototype, a disposable karpulny device for administering the drug Aers-2 according to the patent RU 2413542 was published, published March 10, 2011. A disposable karpulovy device for administering the drug contains a cylindrical body with finger rests on one side and a fixation unit with an injection needle on the end of the body - on the other hand, a protective cap of the needle and a safety nozzle mounted with the possibility of extension on the injection needle and fixation on the cylindrical body at the end of the injection. Inside the casing there is a karbul with a medicinal product, equipped with a piston and installed with the possibility of movement in a cylindrical body. Karpula is equipped with an autopsy control system, worn on it from the piston side and made in the form of a housing having a protrusion on one side and a tear-off part on the other. The injection needle is double-edged. The needle is installed in the guide sleeve of the fixation unit, has an injection part and a part for taking the drug. The end of the guide sleeve from the side of the part for the intake of the drug is made with the possibility of abutment in the counterpart of the rubber piston of the carpula. The fixing unit further includes a protrusion and a backstop, made with the possibility of deflection, between which there is a recess made with the possibility of installing a ledge in it, which is on the safety nozzle. On the safety nozzle there is a clamp made with the possibility, by exerting pressure on the blocker, to block the return stroke of the capsule due to the protrusion of the tamper evident system.

 Presented in the prototype karbul syringe has a complex structure, many intermediate functions in bringing it into action, which determines its cumbersome use (in action), and the impossibility of using standard ampoules. The inconvenience is that carpules today have a fairly low prevalence in the pharmacy network. An unfavorable situation is created for the doctor and patient: there is a karpulny syringe - but the ampoule cannot be used.

 The task is to eliminate the above disadvantages and create a disposable syringe for widespread use in the performance of techniques of intraligamentary, subperiosteal and intrapulpral anesthesia using local anesthetics, both in ampoules and in carps.

To solve the problem, a device for administering drugs has been proposed, comprising a cylindrical body with finger rests on one side and an injection needle on the body end, on the other, a protective cap for the needle. A rubber piston equipped with a metal rod is mounted inside the housing with the ability to move. In turn, the injection needle is made with dimensions of 0.2 × 20 mm and is rigidly fixed at the end of the body.

The technical result of the utility model consists in the possibility of creating high pressure at the outlet when using the proposed device for the above types of anesthesia, and therefore in reducing the time for an injection.

In FIG. shows a side view of the device.

The device comprises a cylindrical body 1, made for example of medical plastic, with finger rests 6 on one side, and an injection needle 4 fixed on the end of the body 1 with a protective cap 5, on the other. Injection needle 4 is fixedly and rigidly connected to the body, and its dimensions are needles - 0.2 × 20 mm, these sizes are quite sufficient and justified for performing the anesthetics listed above.

Inside the housing 1 there is a rubber piston 2 rigidly connected to a metal rod 3, which increases stability while providing a different degree of pressure of the jet at the outlet of the device. On the cylindrical body 1, graduation is performed, for example, similarly to an insulin syringe (not shown in FIG.), For visual control of the drug consumption. The volume of the syringe is 1 ml. The sterility of the syringe is provided in the factory; it is packed in standard sterile packaging, as is customary, for disposable syringes, which allows for a high degree of sterility. Due to the design of the device, there is no problem of “jumping off" the needle 4 due to excessive force on the rod 3, the rod is not deformed, and the use of a protective cap 5 makes it possible to protect the medical staff from accidental injury by used syringes.

 The device is used as follows.

 The sterile packaging is opened, the device is taken out, the protective cap 5 is removed from the needle 4, the ampoule is opened and the drug is collected in the usual way, i.e. the syringe is dipped with a needle into the ampoule and, by extending the rod 3 with the piston 2, a set of the drug is taken over. If there is a kit of medicine from the carpule, then after removing the protective cap 5 from the needle 4, the rubber membrane of the carpula is pierced with the needle 4. The set of the drug in the syringe is identical to the ampoule. If the kit from the carpula is difficult, it can be facilitated by squeezing the piston of the carpula with any object, the diameter of which is less than the diameter of the capsule, and the length coincides with the length of the capsule or is greater than the length of the capsule. Usually, this is done with a dental tool: the back of the handle of the dental mirror, dental spatula, etc. At the end of the injection procedure, a protective cap 5 is put on the injection needle, thereby blocking it from accidental injections.

Clinical examples.

Patient A., 29 years old, appeared for the purpose of rehabilitation of the oral cavity. When examining the oral cavity, the roots of the 17th tooth that were not to be preserved and restored were revealed. Patient A. was removed from the roots of the tooth, and before removal, intraligamentary anesthesia was performed using the device of the proposed design.

Patient D., 42 years old, came to a dental appointment with a diagnosis of acute purulent periostitis of the upper jaw on the right. Before performing the periostotomy operation, patient D. was given subperiosteal anesthesia using the device of the proposed design.

3. Patient N., 27 years old, came to the dental office complaining of pain in the tooth in the lower jaw. When examining the oral cavity, she was diagnosed with pulpitis of 15 teeth. Patient N. was offered endodontic treatment with further preservation of the tooth. During treatment, intra-pulp anesthesia was performed using the device of the proposed design.

Claims (1)

A device for administering drugs containing a cylindrical body with finger rests on one side and an injection needle on the end of the body, on the other hand, a protective cap for the needle, characterized in that a rubber piston equipped with a metal rod is mounted inside the body to move it in turn, the injection needle is made with dimensions of 0.2 × 20 mm and is rigidly fixed at the end of the body.

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