RU213859U1 - Device for injecting drugs - Google Patents

Abstract

The utility model relates to medical equipment and is intended for injecting drugs into soft tissues and parenchymal organs, such as the liver.

The device consists of a temperature control and indication unit, a drug temperature sensor, a heating element, a container for the drug, an air supply channel, an inlet check valve, an outlet check valve, a return spring, a piston, a starting handle, an adjusting handle, a sealing ring, a tip for attaching nozzles , block for controlling the pressure of the drug in the device, the body of the device, the indicator of the pressure of the drug at the tip, the monitor for temperature control, the button for turning on and off the heating element, the knob for adjusting the spring stiffness, the monitor for monitoring pressure.

The device allows to perform multiple injections, providing control of the temperature and pressure of the injected drug, the possibility of heating it. The use of the device with different nozzles makes it possible to use it for the administration of drugs into soft tissues and parenchymal organs, such as the liver.

Description

The utility model relates to medical equipment and is intended for injecting drugs into soft tissues and parenchymal organs, such as the liver.

Treatment of soft tissue wounds is one of the urgent problems of surgery, which is explained, among other things, by the high incidence of this pathology [Obolensky V.N., Semenisty A.Yu., Nikitin V.G., Sychev D.V. Vacuum therapy in the treatment of wounds and wound infection. breast cancer. 2010. V. 18. No. 17. S. 1064-1072]. About 100 million people in the world and up to 5 million people in Russia are annually admitted to surgical hospitals with injuries of various etiologies. This pathology is 50-70% in the structure of the primary referral to a general surgeon [Voronin A.S. The use of wound dressings in the complex treatment of wounds and wound infections of the skin and soft tissues. Postgraduate Bulletin of the Volga Region. 2010. No. 7-8. S. 158-161]. Wound infection is observed in 35-45% of surgical patients in the general structure of surgical morbidity. Currently, the treatment of soft tissue wounds includes a combination of surgical and conservative approaches and is based on a careful consideration of the extent of the lesion, the nature of the traumatic agent, the mechanism of injury [Kenzhekulov K.K. Influence of the method of treatment of purulent wounds on surgical infection. Proceedings of the universities of Kyrgyzstan. 2016. No. 9. S. 26-29]. According to modern literature, many authors focus on the importance of timely surgical treatment and local treatment of the wound, which can significantly reduce the risk of complications [Larichev A.B., Shishlo V.K., Lisovsky A.V., Chistyakov A.L. , Vasiliev A.A. Prevention of wound infection and morphological aspects of aseptic wound healing. Bulletin of Experimental and Clinical Surgery. 2011. V. 4. No. 4. S. 728-733].

Damage to parenchymal organs requiring surgical treatment is also an urgent problem of modern medicine. About 800 thousand patients with injuries of parenchymal organs, in particular the liver, are diagnosed annually in the world, and in recent years there has been an increase of 15-20% [Shabunin A.V., Parfenov I.P., Bedin V.V., Tavobilov M. M., Grekov D.N., Drozdov P.A., Karpov A.A. Liver resection. Specific complications and their prevention. Surgery. Journal them. N.I. Pirogov. 2020. №3. S. 5-12]. Operations on parenchymal organs remain highly traumatic interventions, which is due to the formation of a powerful stress response of the body induced by tissue damage, the risk of developing severe intra- and postoperative complications [Dzhorobekov A.D., Razakulov P.O. Liver resections in alveolar echinococcosis of the liver. Annals of surgical hepatology. 2005. Vol. 10. No. 2. pp. 108a-108]. Mortality rates after extensive operations remain quite high - 21-36%. To date, the arsenal of methods for intraoperative prevention of postoperative complications and the introduction of drugs into parenchymal organs is extremely scarce, which requires the development of this direction.

The development of new ways of administering drugs should reduce the time of hospitalization of patients, reduce the risk of postoperative and post-traumatic complications.

To date, a device for the introduction of medicinal solutions into bone and soft tissues is known [patent SU 858839]. The authors propose to make a longitudinal groove on the conical mandrin tube of the device and place a tapering capillary gap perpendicular to it. The mandrel with a needle form a hydraulic choke with a flow area equal to the cross section of the longitudinal groove. In addition, the depth of the capillary gap increases from 0.001 mm to 0.5 mm, and the depth of the longitudinal groove from 0.1 to 0.5 mm. Moreover, the device is made bimetallic, the mandrel is made mainly of carbon steel, and the needle is mainly made of chromium-nickel alloy. The device is characterized by the possibility of long-term and continuous administration of the drug solution into the tissues without changing the pressure. The disadvantages of the device is the inability to control and change the temperature of the solution, a narrow range of applications - bones and muscles.

A device for intraosseous administration of drugs [US Pat. EN 2151564], allows you to enter drugs into the tissue of the bone marrow. The device consists of a handle and a medical-diagnostic bone marrow needle. The needle has a cylindrical thickening at the end for fixation on the skin surface and closing with an aseptic bandage. The handle is connected to the intraosseous needle with the possibility of separation by means of an adapter. The length of the needle allows it to remain in the bone tissue, and the handle is connected by a screw to a pointed rod designed to protect the needle from clogging with bone filings during the insertion of the device into the bone. As a result, intraosseous drugs can be injected through the device under pressure. The device can be fixed intraosseously for a long time, closing between injections with an aseptic dressing. The disadvantages of the device is a narrow range of applications - maxillofacial surgery, the ability to control and change the temperature and pressure of the solution.

The analogue of the developed device is a device for application-injection application of collagen hydrolyzate [US Pat. EN 126601], which allows injections into soft tissues and on the wound surface. The device consists of a power mechanism, including a spring and a piston with a rod, placed in the housing cavity; containers for the drug connected to the sub-piston cavity, which is part of the housing cavity; limited by a piston, inlet and outlet check valves installed in the housing at the inlet for the supply of the drug and at the outlet of the housing, and the regulator of the extruded volume of the drug. The device has a temperature control and indication unit, a temperature sensor connected to the temperature control and indication unit, a push handle connected to the rod, a handle fixed to the body. The container of the device is equipped with a heating element connected to the control unit and an air supply channel.

One of the disadvantages of the device is the inability to change the pressure of the drug and control this parameter, which can lead to tissue trauma. In addition, the device has a narrow range of temperature regulation, which limits the possibility of using drugs that require strict control of the degree of heating for their activation, such as enzymes.

The technical result of the proposed device is to improve the quality of the introduction of drugs into various tissues of the body, due to the presence of the function of controlling the temperature of the injected drug solution in the range of 25-42 ° C, control and regulation of the pressure of the injected drug solution in the range from 0.01 to 1.9 atm ., as well as the possibility of using interchangeable nozzles for drug administration.

The device for injecting drugs consists of a temperature control and indication unit (1), a drug temperature sensor (2), a heating element (3), a drug container (4), an air supply channel (5), an inlet check valve (6 ), outlet check valve (7), return spring (8), piston (9), start handle (10), adjustment handle (11), o-ring (12), tip for attaching nozzles (13), drug pressure display unit (14), device body (15) and tip pressure indicator (16), temperature monitor (17), heating element on/off button (18), spring rate knob (19), pressure monitor (20) (Fig. 1).

The device works as follows. The drug is placed in a container (4). Data from the temperature sensor (2) is sent to the control and indication unit (1), the measurement results are displayed on the temperature control monitor (17). If it is necessary to increase the temperature of the preparation, the heating element (3) is activated using the on/off button of the heating element (18) on the temperature control and display unit (1). The preparation can be heated up to 42°С. When the drug reaches the required temperature, which is monitored on the temperature control monitor (17), the heating element (3) is turned off using the on/off button (18).

By turning the knob for adjusting the stiffness of the spring (19) and pressing on the adjusting knob (11), the stiffness of the return spring (8) and the sealing ring (12) is set. On the monitor for pressure control (20) on the drug pressure display unit (14), the pressure required in each case is set, the possibility of adjusting which is provided in the range from 0.01 to 1.9 atm. To inject the drug, press the start handle (10), air is squeezed out from the sub-piston cavity through the exhaust check valve (7) by the piston (9). When the start handle (10) is released, the piston (9) under the influence of the return spring (8) moves to its original position, determined by the position of the adjusting handle (11) and the knob for adjusting the spring stiffness (19). The drug enters the device. At the same time, the outlet check valve (7) closes due to the pressure of the drug (4), thereby preventing the entry of atmospheric air into the cavity of the device. To prevent the formation of a vacuum, the container for the drug (4) is equipped with an air supply channel (5). The discharge check valve (7) opens due to the vacuum in the internal cavities of the device created by the piston (9) retracting to its original position, providing access of the substance from the drug container (4) to the pressure indicator at the tip (16). In this position, the pressure of the drug is recorded, with which it will flow to the tip for attaching nozzles (13) and further into the body tissues.

To complete the work and remove the drug and air from the device, it is necessary to make 3-5 pressures on the starting handle (10) until it stops.

Description for the figures.

Fig. 1. Diagram of a device for injecting drugs.

1 - control unit and temperature indication,

2 - drug temperature sensor,

3 - heating element,

4 - container for the drug,

5 - air supply channel,

6 - inlet check valve,

7 - exhaust check valve,

8 - return spring,

9 - piston,

10 - starting handle,

11 - adjusting handle,

12 - sealing ring,

13 - tip for attaching nozzles,

14 - drug pressure control unit in the device,

15 - device body,

16 - indicator of drug pressure at the tip,

17 - monitor for temperature control,

18 - button for turning on and off the heating element,

19 - knob for adjusting the stiffness of the spring,

20 - monitor for pressure control.

Claims (1)

A device for injecting drugs, consisting of a body, a container for a drug, an air supply channel, an inlet check valve, an outlet check valve, a return spring, a piston, a heating element, a drug temperature sensor, a starting handle, an adjusting handle, a sealing ring, characterized in that , which additionally includes a control and indication unit and a temperature control monitor, as well as a control unit and a pressure monitoring monitor, a knob for adjusting the spring stiffness and a drug pressure indicator at the tip for attaching nozzles.

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