RU124155U1 - MEDICAL SYRINGE WITH PRESSURE ALIGNMENT CAMERA - Google Patents

Abstract

The utility model relates to medicine and can be used as local anesthesia for various interventions, for example, in dentistry for local injection analgesia. The technical task of the proposed utility model is the stabilization of the rate of injection of the solution (anesthetic) into the tissue at a given level in order to reduce the pain syndrome to almost zero, i.e. improving the convenience of medical staff and patient comfort. To solve this problem, we propose a medical syringe with a pressure equalization chamber containing a classic case, with a piston and a needle, characterized in that a pressure equalization chamber, which is an annular diaphragm that is placed in the narrowed front of the case, is placed in the front of the case directly in front of the needle, moreover, the geometric dimensions of the camera and aperture are selected from the condition; the pressure equalization chamber is placed in the middle conical needle; the pressure equalization chamber may contain two diaphragms.

2 ill

Description

The utility model relates to medicine and can be used for injections, for example, during local anesthesia during various interventions, including dentistry for local injection analgesia, as well as in general medicine for the administration of solutions requiring control of the rate of administration.

Especially the proposed device can be used for local anesthesia of young children, because allows you to reduce pain at the time of injection.

A big problem all over the world is the reduction of pain with an injection of the body, in particular with local anesthesia. It is known that pain does not occur with a direct injection, but with the introduction of a solution at a high speed.

It is known from the prior art for the introduction of solutions that, for example, during infiltration anesthesia, anesthetics in the amount of 1.5-2.0 ml are administered slowly to avoid severe pain from delamination of tissues with a solution (Bizyaev A.F. et al., “Anesthesia in conditions of the dental clinic ", M, 2002, p. 40).

However, the rate of introduction of the solution into the tissue should in no case exceed 1 ml per min (E. Borovsky and others, “Therapeutic dentistry”, M, JSC “Dentistry”, 2005, p. 14).

At the same time, during the injection into the tissues, the doctor (nurse) is guided only by personal sensation and does not know what pressure develops at the time of administration or what is the speed of the solution (number of ml per unit time), in essence this is “creeping empiricism”.

It is also known that all recommendations for the rate of introduction of the solution are given without taking into account the ratio of tissue density at the injection site, the density of the solution, as well as the pressure and speed of the solution, in local anesthetic.

A device for introducing a solution at a low speed (adjustable) is known, according to the patent of the Russian Federation No. 2342125 (2008,12.27) "Electronic syringe", which consists of a microcontroller unit with a control indicator, a foot pedal, with which anesthetic, a power source (network) are supplied 220 V, 50 Hz) and a set of disposable systems.

With all its positive qualities, this device has two significant drawbacks: rather cumbersome, and most importantly very expensive (tens of thousands of rubles).

The Sleeper One electronic transcortical anesthesia system with Jntralig-S needles is known, see on JD internet site: www.information-dentaire.com.

The system contains: a computer unit, a unit for setting operating modes with an indication, a power unit, a set of needles, foot pedals and a set of cables.

Of course, this is an excellent system, but it is rather cumbersome and very expensive, about several thousand euros.

An Anesthesia electronic anesthesia device from Japan is known, see JD internet site: www.information-dentaire.com. - PROTOTYPE.

This device is made in a shape resembling a gun and having approximately the same dimensions.

The device comprises: a housing on which a special disposable syringe is attached (inserted), an on / off button is on the housing, and an electromechanical part is located inside the housing. The electronic part is located on the remote control: it is a microcontroller (MS), the control and display panel (mode settings and their reflection on the LCD), the remote control is connected to the device by a flexible cable, the MS controls the electromechanical part to enter the anesthetic through a syringe (drive). Power is supplied by the built-in battery.

The disadvantages include the availability of specialized syringes, as well as a very high cost. Such a device will find application in specialized dental clinics, but due to its high cost it is not available for all segments of the population and regions of the Russian Federation.

The common disadvantages of the presented models include the fact that they are complex reusable technical devices, and therefore there is a potential risk of infection for patients and staff.

The technical task of the proposed utility model is the stabilization of the rate of injection of the solution (anesthetic) into the tissue at a given level in order to reduce the pain syndrome to almost zero, i.e. improving the convenience of medical staff and patient comfort.

To solve this problem, we propose a medical syringe with a pressure equalization chamber containing a classic case, with a piston and a needle, characterized in that a pressure equalization chamber, which is an annular diaphragm that is placed in the narrowed front of the case, is placed in the front of the case directly in front of the needle, moreover, the geometric dimensions of the camera and aperture are selected from the condition; the pressure equalization chamber is placed in the middle conical needle; the pressure equalization chamber may contain two diaphragms.

Figures 1 and 2 show two versions of a medical syringe, which depict: 1 - the body of the syringe, 2 - the piston rod, 3 - the washer for the intake and delivery of anesthetic (solution), 4 - the handle in the form of a washer to control the washer 3, 5 - pressure equalization chamber, 6 - annular diaphragm, 7 - rear housing cover, 8 - front housing cover according to the first embodiment, 9 - needle, 10 - front housing cover according to the second embodiment.

The scheme according to the first embodiment (Fig. 1) has the following connections: inside the body of the syringe 1 there is a washer 3 with a rod 2 with the possibility of movement along the longitudinal axis using the handle 4; the front part of the housing 1 is changed compared to the classical one, namely: it is narrowed in steps and a pressure balancing chamber 5 with an annular diaphragm 6 is placed in it, a pressure balancing chamber 5 is connected to the needle 9 through the front cover of the housing 8.

The scheme according to the second variant (Fig. 2) has the following connections: a classic case of a syringe 1 with a washer 3 for taking and feeding an anesthetic connected through a rod 2 with an anesthetic supply handle 4 is taken, the case of the syringe 1 is closed on the front side of the front cover of the case 10, and on the back side, with a cover 7, through the front cover of the body passes a needle 9, in the middle of which there is a pressure equalization chamber 5 with a diaphragm 6.

Work on both options is as follows.

At the time of injection with syringe 1, the pressure created by the operator (nurse) is transmitted via a piston to the solution, which is fed through the needle 9 into the tissue. Due to the presence of a pressure equalization chamber 5, the final pressure in the nose of the syringe needle 9 of the anesthetic (solution) does not exceed the recommended for this type of injection, which ensures painless administration.

For a softer solution administration, a double diaphragm can be entered. The first and second options in comparison with analogues and prototype have the following advantages: ease of production (body and / or needle), therefore, the cost of their manufacture is minimal, and the effect of painless injection is very high. Thus, the basic economic postulate is fulfilled: “cost - efficiency”.

Claims (1)

A medical syringe containing a housing with a piston and a needle, characterized in that in the front of the housing directly in front of the needle there is a pressure equalization chamber and may contain two diaphragms; alternatively, the pressure equalization chamber can be located in the middle cone-shaped part of the needle with one diaphragm.

Images