CN114145821A

CN114145821A - Foot-controlled trial injection device for nerve block

Info

Publication number: CN114145821A
Application number: CN202111487241.XA
Authority: CN
Inventors: 杨倚天; 张加强; 崔明珠; 刘鹏飞
Original assignee: Henan Provincial Peoples Hospital
Current assignee: Henan Provincial Peoples Hospital
Priority date: 2021-12-07
Filing date: 2021-12-07
Publication date: 2022-03-08

Abstract

The invention provides a foot-controlled trial injection device for nerve block, which comprises a shell, wherein an injector and an electric cylinder for driving a piston body in the injector to move are arranged in the shell; the first end of the shell is detachably provided with a connector body, the first end of the connector body is connected with a puncture needle, the end part of the second end of the connector body is provided with a first conduit extending towards the interior of the connector body, and the end part of the injector is provided with a second conduit opposite to the first conduit; the electric cylinder is connected with a pedal, two groups of pedal keys connected with the electric cylinder through a lead are arranged in the pedal, and the two groups of pedal keys comprise a first pedal key for controlling and driving the axial machine shell to move towards the first end and a second pedal key for contracting towards the second end of the machine shell; when the pedal key is not stepped on, the pedal key is supported by the elastic piece so that a circuit connected with the electric cylinder is in an open circuit state; when any pedal key is trodden, the pedal key moves down to connect a circuit connected with the electric cylinder; trample first and step on the key, the medicament is followed the syringe and is injected into the patient along the joint body and pjncture needle internal, and the operation is comparatively convenient, uses manpower sparingly.

Description

Foot-controlled trial injection device for nerve block

Technical Field

The invention relates to an injection auxiliary tool, in particular to a foot-controlled trial injection device for nerve block.

Background

The nerve block is to inject local anesthetic around nerve trunk, plexus and node to block the impulse conduction and make the innervated area produce anesthesia; the nerve block only needs one injection to obtain a larger anesthesia area.

Generally, nerve blocking agent injection requires the cooperation of at least two medical care personnel, namely, the first person contacts the part to be injected of a patient with one hand and holds a puncture needle with the other hand to find a proper injection angle and depth; after the first person finds the optimal injection point, the second person pushes the injector to inject the medicament into the corresponding part in the body of the patient, and the injection mode is troublesome to operate.

Disclosure of Invention

The invention aims to overcome the defects of the background technology and provides a foot-controlled trial injection device for nerve block.

The embodiment of the invention is realized by the following technical scheme:

a foot-controlled trial injection device for nerve block comprises a shell, wherein the shell is provided with a first end and a second end which are opposite, and an injector and an electric cylinder for driving a piston body in the injector to move are arranged in the shell; the first end of the shell is detachably provided with a connector body, the first end of the connector body is connected with a puncture needle, the end part of the second end of the connector body is provided with a first conduit extending towards the interior of the connector body, the end part of the injector is provided with a second conduit opposite to the first conduit, and the outer diameter of the second conduit is matched with the inner diameter of the first conduit;

the electric cylinder is connected with a pedal, two groups of pedal keys connected with the electric cylinder through a lead are arranged in the pedal, the two groups of pedal keys are respectively supported on the pedal through a group of elastic parts, and the two groups of pedal keys comprise a first pedal key for controlling and driving the axial shell to move towards the first end and a second pedal key for contracting towards the second end of the shell; when the pedal key is not stepped on, the pedal key is supported by the elastic piece so that a circuit connected with the electric cylinder is in an open circuit state; when any pedal key is trodden, the pedal key moves down to connect a circuit connected with the electric cylinder; the first stepping key is stepped to drive the piston body to move towards the first end of the shell so as to realize injection.

Furthermore, the inner wall of the joint body is hinged with a swing rod and a first elastic piece, and the first elastic piece is connected with the swing rod so as to drive a first sealing ball at the free end of the swing rod to be sealed at the tail end of the first guide pipe; the inner wall of the first conduit is also provided with a mandril extending to the outside of the second end of the joint body; the second end of the shell is detachably provided with an end cover, and the electric cylinder is arranged in the end cover;

the syringe can be arranged in the shell in a sliding way between the first end and the second end of the shell, a medicine storage cavity is arranged in the syringe between the first end of the syringe and a piston body in the syringe, and a driving shaft of the electric cylinder is rotatably connected with the piston body; the first end part of the injector is provided with the second conduit, and the side wall of the free end of the second conduit is provided with a notch; a second sealing ball is arranged at one end part of the second conduit in the medicine storage cavity and is connected with the second sealing ball in a stretching way;

when the electric cylinder drives the injector to move towards the first end of the shell, the second guide pipe extends into the first guide pipe, the notch on the second guide pipe penetrates through the ejector rod, so that the first sealing ball is ejected out of the end part of the first guide pipe through the free end of the second guide pipe, and meanwhile, the ejector rod ejects the second sealing ball out of the end part of the second guide pipe, so that the joint body is communicated with the medicine storage cavity.

Furthermore, the first end of the syringe is provided with a top ring, the second end of the connector body is provided with a sealing ring, and when the connector body is communicated with the medicine storage cavity, the top ring is pressed and sealed on the sealing ring.

Furthermore, a joint is sleeved at the free end of the driving shaft, a first convex ring is arranged on the outer side wall of the joint, and the first convex ring is provided with a first side and a second side which are opposite; the connector is sleeved with a connecting cap, a first end of the connecting cap is provided with a second convex ring which is clamped on the first side of the first convex ring, the tail end of the connector is provided with a plurality of buckling pieces, the piston body is connected with a piston shaft, the end part of the piston shaft is provided with an inner tube body, the inner side wall of the inner tube body is provided with a third convex ring, the buckling pieces are buckled in the third convex ring, and the connecting cap is in threaded sleeve joint with the inner tube body.

Furthermore, the inner wall of the casing is provided with guide rails arranged along the direction of the first end and the second end of the casing, and the outer side wall of the injector is provided with a guide support connected with the guide rails in a sliding manner.

Furthermore, the casing is cylindrical, and a plurality of through holes are formed in the side wall of the first end of the casing.

Further, the puncture needle is detachably connected to the end part of the first end of the joint body.

The technical scheme of the embodiment of the invention at least has the following advantages and beneficial effects:

according to the nerve block foot control injection testing device, the injector and the electric cylinder are arranged in the shell, the electric cylinder drives the piston body in the injector to move by stepping on the stepping key on the pedal, and the shell is held by a hand during operation; the first end of the connector body is provided with a puncture needle, the end part of the second end of the connector body is provided with a first conduit extending towards the interior of the connector body, the end part of the injector is provided with a second conduit opposite to the first conduit, and the outer diameter of the second conduit is matched with the inner diameter of the first conduit; the medicament is injected into the patient body from the injector along the joint body and the puncture needle, so that the operation is convenient and fast, and the labor is saved; meanwhile, the joint body is detachably connected with the shell, so that the joint body is convenient to replace.

Drawings

FIG. 1 is a schematic structural view of a nerve block foot control priming device of the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is a schematic view of the connection between the piston shaft and the driving shaft according to the present invention;

icon: 1-machine shell, 10-handle part, 11-end cover, 12-connector body, 120-first conduit, 121-mandril, 122-first sealing ball, 123-swing rod, 124-first elastic part, 125-sealing ring, 13-guide rail, 14-through hole, 2-electric cylinder, 20-driving shaft, 200-connector, 201-first convex ring, 202-buckling part, 21-connecting cap, 210-second convex ring, 3-injector, 30-medicine storage cavity, 31-piston body, 32-piston shaft, 320-inner tube body, 321-third convex ring, 33-guide bracket, 34-second conduit, 340-notch, 341-fourth convex ring, 342-second elastic part, 343-second sealing ball and 35-top ring, 4-puncture needle, 5-pedal, 50-pedal key, 51-lead and 52-second pedal key.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Referring to fig. 1 to 3, the invention provides a nerve block foot control injection device, which comprises a casing 1, wherein the casing 1 is cylindrical, a handle part 10 is arranged on the casing 1, so that medical personnel can hold the casing conveniently, and meanwhile, a plurality of through holes 14 are formed in the side wall of the first end of the casing 1; the shell 1 is provided with a first end and a second end which are opposite, the injector 3 is arranged in the shell 1, the injector 3 is internally provided with a piston body 31, a medicine storage cavity 30 is formed between the piston body 31 and the first end of the injector 3, the piston body 31 is connected with a piston shaft 32, and the piston shaft 32 is pulled and pressed to drive the injector 3 to realize injection or suction.

The first end of the casing 1 is detachably provided with a connector body 12, in this embodiment, the connector body 12 is detachably connected with the first end of the casing 1, and the first end of the connector body 12 is provided with a puncture needle 4, that is: alternatively, the puncture needle 4 can be directly mounted on the joint body 12, and the machine shell 1 is held for direct puncture injection; in the embodiment, the puncture needle 4 is connected with the connector body 12 through the medical extension hose, so that a doctor can directly hold the puncture needle 4 for operation without holding the casing 1 during puncture operation, and the puncture angle and depth can be conveniently controlled.

The second end of the connector body 12 is provided with a first conduit 120 extending towards the interior of the connector body 12, the end of the syringe 3 is provided with a second conduit 34 opposite to the first conduit 120, the second conduit 34 has an outer diameter matching the inner diameter of the first conduit 120, and the second conduit 34 extends into the first conduit 120.

The electric cylinder 2 is connected with a pedal 5, two groups of pedal keys connected with the electric cylinder 2 through a lead 51 are arranged in the pedal 5, and the prior art is adopted: two sets of pedal keys are supported on the pedal 5 through a set of elastic members (not shown), the two sets of pedal keys comprise a first pedal key 50 for controlling the driving shaft 20 to move towards the first end of the machine shell 1 and a second pedal key 52 for contracting towards the second end of the machine shell 1, and the two sets of pedal keys can form a loop with the electric cylinder 2 respectively; when the pedal keys are not stepped on, the two groups of pedal keys are respectively supported by the elastic piece so as to be in an open circuit state with a circuit connected with the electric cylinder 2; when any pedal key is trodden, the trodden pedal key moves down to connect a circuit connected with the electric cylinder 2 so as to realize the drive control of the electric cylinder 2, and after the pedal key is released, the electric cylinder 2 stops running; wherein, when the first step key 50 is stepped, the piston body 31 is driven to move towards the first end of the casing 1 to compress the medicine storing cavity 30 to realize injection.

The foot-controlled trial injection device for nerve block well reduces the labor intensity of nerve block injection, however, in the injection process, after medical staff steps on the stepping key on the pedal 5, the medicament directly starts to be injected into the body of a patient, the buffering time is short, and because the medical staff keeps high concentration in the state of mind in the injection process, if the puncture needle 4 cannot puncture the optimal puncture position, the injection stepping key is stepped in advance or mistakenly stepped, the medicament is difficult to be injected into the optimal position, the curative effect of the medicament is reduced, and even medical accidents are caused; in view of the above, the present invention provides improved and optimized structures.

Specifically, referring to fig. 2, in the present embodiment, a puncture needle 4 is disposed at a first end of the connector body 12, a first conduit 120 extending towards the interior of the connector body 12 is disposed at a second end of the connector body 12, a swing link 123 and a first elastic member 124 are hinged to an inner side wall of the connector body 12, the first elastic member 124 is connected to the swing link 123, so as to drive a first sealing ball 122 at a free end of the swing link 123 to seal a terminal of the first conduit 120, and prevent blood and body fluid from entering the syringe 3 during puncturing the puncture needle 4; the inner side wall of the first conduit 120 is further provided with a push rod 121 extending to the outside of the second end of the connector body 12 in a bending manner.

The second end of the casing 1 is detachably provided with an end cover 11, in this embodiment, the end cover 11 is in threaded connection with the second end of the casing 1, and the electric cylinder 2 is arranged in the end cover 11.

The inner wall of the circumferential side of the casing 1 is provided with guide rails 13 arranged along the direction of the first end and the second end of the casing 1, the outer side wall of the injector 3 is provided with a guide support 33 connected with the guide rails 13 in a sliding manner, so that the injector 3 can slide between the first end and the second end of the casing 1, the injector 3 is internally provided with a medicine storage cavity 30 positioned between the end part of the first end of the injector 3 and a piston body 31 in the injector 3, and a driving shaft 20 at the tail end of the electric cylinder 2 is rotatably connected with the piston body 31, namely, when the electric cylinder 2 rotates around the axis of the electric cylinder 2, the piston body 31 cannot be driven to rotate.

The second conduit 34 extending towards the first conduit 120 is disposed at the first end of the syringe 3, when no injection is performed, the second conduit 34 is located outside the second end of the first conduit 120, a notch 340 is disposed on the free end side wall of the second conduit 34, a second sealing ball 343 is disposed at the end of the second conduit 34 located in the drug storage cavity 30, a fourth convex ring 341 is disposed in the second conduit 34, the fourth convex ring 341 is connected with a second elastic member 342, and the second sealing ball 343 is connected with the second sealing ball 343 located in the second conduit 34 in a stretching manner, that is, the second sealing ball 343 is sealed at the end of the second conduit 34 under the stretching of the second elastic member 342.

The syringe 3 can be taken out along the second end of casing 1, and during initial state, for the medicine chamber 30 filling medicament of depositing of syringe 3, manual pulling piston shaft 32, deposit the medicine chamber 30 container and enlarge, produce great negative pressure, adsorb second ball seal 343 to depositing the inboard in medicine chamber 30, cause second pipe 34 to switch on, deposit the medicament in the medicine chamber 30.

Next, outside the casing 3, the connection of the piston shaft 32 on the injector 3 with the drive shaft 20 of the electric cylinder 2 is realized; then, the syringe 3 is pushed into the housing 1 along the second end of the housing 1, the end cap 11 is screwed, the first end of the syringe 3 is sealed by the second sealing ball 343, the first end is sealed by the piston body 31, and the medicine storage chamber 30 cannot be stretched or compressed, so that the syringe 3 and the electric cylinder 2 are connected into a whole at this time, and the syringe 3 cannot slide in the housing 1 before the electric cylinder 2 is started.

When the first pedal key 50 is stepped on, the electric cylinder 2 drives the injector 3 to move towards the first end of the machine shell 1, and in the process, the medicine storage cavity 30 cannot be pushed out due to the fact that the first end is sealed by the second sealing ball 343; until the second conduit 34 extends into the first conduit 120, the notch 340 on the second conduit 34 passes through the top bar 121 so as not to be blocked by the top bar 121; after the second conduit 34 extends to a certain depth from the first conduit 120, the free end of the second conduit 34 ejects the first sealing ball 122 from the end of the first conduit 120, and at the same time, the ejector rod 121 ejects the second sealing ball 343 from the end of the second conduit 34, the first sealing ball 122 and the second sealing ball 343 both release the sealing effect, the connector body 12 is communicated with the medicine storage cavity 30, and the electric cylinder 2 continues to advance, so that the medicine is uniformly injected into the human body.

Trample first step on key 50 after, syringe 3 removes, and casing 1 can adopt transparent construction, like the ya keli material, is convenient for observe the removal condition of syringe 3 and the condition of medicament pump income, because it has certain time to begin to move the medicine storage chamber 30 of syringe 3 and switch on with joint body 12 from syringe 3, the medical personnel of being convenient for in time discover the maloperation, loosen and step on the key, electricity jar 2 stops to remove, and syringe 3 stops to remove, can in time avoid mistake or maloperation.

After the injection is completed, the second step key 52 is stepped, the electric cylinder 2 drives the piston body 31 to move towards the second end of the casing 1, slight friction between the piston body 31 and the medicine storage cavity 30 drives the syringe 3 to move towards the second end of the casing 1 by a small section, so that the ejector rod 121 is separated from the second sealing ball 343, the second sealing ball 343 retracts to seal the second conduit 34 under the elastic action of the second elastic piece 342, the volume of the medicine storage cavity 30 cannot be changed, the driving shaft 20 of the electric cylinder 2 drives the piston body 31, and the piston body 31 drives the syringe 3 to move towards the second end of the casing 1 by using the negative pressure of the medicine storage cavity 30.

In this embodiment, the electric cylinder 2 is a dc electric push rod with model number SD50, which is manufactured by beijing botianshundard electromechanical technology ltd, the working voltage is 24V, a mobile power supply can be used for supplying power, the moving speed of the driving shaft 20 is 2 mm-10 mm per second according to different loads, and an internal driving mode of a screw structure is adopted, so that the injection is smooth and uniform; the diameter of the equipment is 20mm, the equipment is suitable for being installed in the machine shell 1, and the installation condition is ideal.

In addition, in some embodiments, the first end of the syringe 3 is provided with a top ring 35, the second end of the connector body 12 is provided with a sealing ring 125, and when the connector body 12 is communicated with the drug storage cavity 30, the top ring 35 is pressed and sealed on the sealing ring 125, so that the sealing effect can be further increased.

In this embodiment, referring to fig. 3, a joint 200 is sleeved at a free end of the driving shaft 20 in a threaded connection manner, a first convex ring 201 is arranged on an outer side wall of the joint 200, and the first convex ring 201 has a first side and a second side opposite to each other; the connector 200 is sleeved with a connecting cap 21, a first end of the connecting cap 21 is provided with a second convex ring 210 clamped on a first side of the first convex ring 201, the tail end of the connector 200 is provided with a plurality of fasteners 202, the end part of the piston shaft 32 is provided with an inner tube body 320, the inner side wall of the inner tube body 320 is provided with a third convex ring 321, the fasteners 202 are buckled in the third convex ring 321, and the connecting cap 21 is in threaded sleeve joint on the inner tube body 320, so that the rotary connection between the driving shaft 20 and the piston shaft 32 is realized.

In some embodiments, the needle 4 is removably attached to the end of the first end of the connector body 12 to facilitate replacement.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A foot-controlled trial injection device for nerve block is characterized by comprising a casing (1), wherein the casing (1) is provided with a first end and a second end which are opposite to each other, and an injector (3) and an electric cylinder (2) for driving a piston body (31) in the injector (3) to move are arranged in the casing (1); a joint body (12) is detachably arranged at the first end of the machine shell (1), a puncture needle (4) is connected with the first end of the joint body (12), a first guide pipe (120) extending towards the interior of the joint body (12) is arranged at the end part of the second end of the joint body (12), a second guide pipe (34) opposite to the first guide pipe (120) is arranged at the end part of the injector (3), and the outer diameter of the second guide pipe (34) is matched with the inner diameter of the first guide pipe (120);

the electric cylinder (2) is connected with a pedal (5), two groups of pedal keys connected with the electric cylinder (2) through a lead (51) are arranged in the pedal (5), the two groups of pedal keys are respectively supported on the pedal (5) through one group of elastic parts, and the two groups of pedal keys comprise a first pedal key (50) for controlling the driving shaft (20) to move towards the first end of the shell (1) and a second pedal key (52) for contracting towards the second end of the shell (1); when the pedal key is not stepped on, the pedal key is supported by the elastic piece so that a circuit connected with the electric cylinder (2) is in an open circuit state; when any pedal key is trodden, the pedal key moves down to connect a circuit connected with the electric cylinder (2); the first step key (50) is stepped to drive the piston body (31) to move towards the first end of the machine shell (1) to realize injection.

2. The blocked foot-controlled priming device of claim 1, wherein: the inner wall of the joint body (12) is hinged with a swing rod (123) and a first elastic piece (124), the first elastic piece (124) is connected with the swing rod (123) so as to drive a first sealing ball (122) at the free end of the swing rod (123) to be sealed at the tail end of the first guide pipe (120); the inner wall of the first conduit (120) is also provided with a mandril (121) which extends to the outside of the second end of the joint body (12); an end cover (11) is detachably arranged at the second end of the machine shell (1), and the electric cylinder (2) is arranged in the end cover (11);

the injector (3) is arranged in the shell (1) in a manner that the injector can slide between the first end and the second end of the shell (1), a medicine storage cavity (30) is arranged in the injector (3) and is positioned between the first end of the injector (3) and a piston body (31) in the injector (3), and a driving shaft (20) of the electric cylinder (2) is rotatably connected with the piston body (31); the first end part of the injector (3) is provided with the second conduit (34), and the side wall of the free end of the second conduit (34) is provided with a notch (340); a second sealing ball (343) is arranged at one end part of the second conduit (34) positioned in the medicine storage cavity (30), and the second sealing ball (343) is connected with the second sealing ball (343) positioned in the second conduit (34) in a stretching way;

when the electric cylinder (2) drives the injector (3) to move towards the first end of the shell (1), the second guide pipe (34) extends into the first guide pipe (120), the notch (340) on the second guide pipe (34) penetrates through the ejector rod (121) so as to eject the first sealing ball (122) out of the end part of the first guide pipe (120) through the free end of the second guide pipe (34), and meanwhile, the ejector rod (121) ejects the second sealing ball (343) out of the end part of the second guide pipe (34), so that the joint body (12) is communicated with the medicine storage cavity (30).

3. The nerve block foot control priming device of claim 2, wherein: the first end portion of syringe (3) is equipped with apical ring (35), and the second end tip of connector body (12) is equipped with sealing washer (125), when connector body (12) and deposit medicine chamber (30) and switch on, apical ring (35) crimping is sealed in on sealing washer (125).

4. The nerve block foot control priming device of claim 2, wherein: the free end of the driving shaft (20) is sleeved with a joint (200), the outer side wall of the joint (200) is provided with a first convex ring (201), and the first convex ring (201) is provided with a first side and a second side which are opposite; the connector (200) is sleeved with a connecting cap (21), the first end of the connecting cap (21) is provided with a second convex ring (210) which is clamped on the first side of the first convex ring (201), the tail end of the connector (200) is provided with a plurality of buckling pieces (202), the piston body (31) is connected with a piston shaft (32), the end part of the piston shaft (32) is provided with an inner body (320), the inner side wall of the inner body (320) is provided with a third convex ring (321), the buckling pieces (202) are buckled in the third convex ring (321), and the connecting cap (21) is in threaded sleeve joint with the inner body (320).

5. The nerve block foot control priming device of claim 2, wherein: the inner wall of the machine shell (1) is provided with guide rails (13) arranged along the direction of the first end and the second end of the machine shell (1), and the outer side wall of the injector (3) is provided with a guide support (33) connected with the guide rails (13) in a sliding manner.

6. The nerve block foot control priming device of claim 2, wherein: the casing (1) is cylindrical, and a plurality of through holes (14) are formed in the side wall of the first end of the casing (1).

7. The nerve block foot control priming device of claim 2, wherein: the puncture needle (4) is detachably connected to the end part of the first end of the joint body (12).