CN211158018U

CN211158018U - Automatic medicine injection device for nerve block

Info

Publication number: CN211158018U
Application number: CN201921563561.7U
Authority: CN
Inventors: 邹小华; 王丰; 史静; 周倩; 谌旻欢
Original assignee: Affiliated Hospital of Guizhou Medical University
Current assignee: Affiliated Hospital of Guizhou Medical University
Priority date: 2019-09-19
Filing date: 2019-09-19
Publication date: 2020-08-04
Anticipated expiration: 2029-09-19

Abstract

The utility model discloses an automatic medicine injection device for nerve block, which comprises a power device, an injector and a needle holder, wherein the injector comprises a needle cylinder and a piston rod which can move in the needle cylinder, the tail end of the piston rod is provided with a piston handle, the front end of the needle cylinder is communicated with a puncture needle through a medicine injection catheter, the edge of the other end is provided with a needle wing, and the medicine injection catheter runs in the needle holder; the power device comprises a shell, a driving mechanism, a pin fin fixing clamp and a piston handle fixing clamp, wherein the shell is provided with a moving groove, the pin fin fixing clamp is fixed on the shell, and the piston handle fixing clamp is arranged on the moving groove in a sliding manner; the needle holding handle is provided with a medicine injection button and a withdrawal button which are both connected with the driving mechanism through control wires. An operator can control injection or retraction by holding the medicine injection button and the retraction button on the needle handle with one hand, and only one person is needed to complete nerve block anesthesia, so that the labor is saved; and the system is helpful for the anaesthetists to know the pressure dynamics of the drug injection and provides reference for the drug injection condition.

Description

Automatic medicine injection device for nerve block

Technical Field

The utility model belongs to the technical field of medical instrument, specifically a nerve is automatic injection device for retardation.

Background

Nerve block anesthesia is a method of injecting local anesthetic around nerve trunk, plexus and node to block impulse conduction and make the innervated area produce anesthesia to achieve painless operation, and is widely used in clinical practice, and commonly used nerve blocks are helpful for blocking nerve trunk, infraorbital, ischial and digital nerve trunks, cervical plexus and brachial plexus, and blocking stellate ganglia and lumbar sympathetic ganglia for diagnosis and treatment.

Nerve block under the ultrasonic guidance is an important technology which is rapidly popularized in recent years, the technology requires that an anaesthetist operates an ultrasonic probe with one hand to display nerves, operates a nerve block puncture needle with the other hand to reach a block point under the ultrasonic guidance, before injecting medicine at the block point, the puncture needle needs to be drawn back to observe whether the puncture needle mistakenly enters a blood vessel, at the moment, an anaesthesia assistant is usually required to repeatedly draw back and inject medicine under the instruction of the anaesthetist, the block point needs to be changed according to the medicine injection situation frequently, the matching of the anaesthesia assistant sometimes cannot meet the requirements of the anaesthesia physicians easily, and the effect and the efficiency of nerve block can be influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the prior art not enough, provide a but single-person operation's automatic injection device for the nerve block to make and reduce the manpower, and make and shorten nerve block and try to annotate time and improve and try to annotate efficiency etc..

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an automatic medicine injection device for nerve block comprises a power device, an injector arranged on the power device, and a needle holding handle;

the injector comprises a needle cylinder and a piston rod capable of moving in the needle cylinder, the tail end of the piston rod is provided with a piston handle, the front end of the needle cylinder is communicated with the puncture needle through a medicine injection guide pipe, the edge of the other end of the needle cylinder is provided with a needle fin, and the medicine injection guide pipe is moved in the needle holding handle;

the power device comprises a shell, a driving mechanism arranged in the shell, a pin fin fixing clamp used for fixing a needle cylinder and a piston handle fixing clamp used for fixing a piston handle, wherein the shell is provided with a moving groove;

and the needle holding handle is provided with a medicine injection button and a withdrawal button which are connected with the driving mechanism through control wires.

Further, the injection device also comprises a pressure sensor arranged on the inner side of the piston handle fixing clamp and used for measuring injection pressure and a pressure display screen arranged on the shell, wherein the pressure sensor is connected with the pressure display screen through an electric signal.

Furthermore, the driving mechanism comprises a motor, a screw rod and a nut arranged on the screw rod, an output shaft of the motor is in transmission connection with the screw rod to drive the screw rod to rotate, the nut is connected with the piston handle fixing clamp, the medicine injection button is connected with a forward rotation circuit of the motor through a control lead, and the withdrawal button is connected with a reverse rotation circuit of the motor through a control lead.

Further, the piston rod comprises piston connecting rod, elastomer and the motion push rod of coaxial distribution, piston connecting rod is located in the cylinder, the one end of motion push rod is passed through the elastomer with piston connecting rod connects, and the other end and piston handle fixed connection, be provided with pressure alarm on the outer terminal surface of piston handle, pressure alarm can be connected with the power electricity through connecting circuit, and when the effort between motion push rod and piston connecting rod equals the set pressure 15psi of elastomer, pressure alarm then forms closed circuit through connecting circuit and power to make pressure alarm live working and output alarm information.

The nerve can be damaged to injection anesthetic pressure during nerve block is too big, and the piston connecting rod is connected with the motion push rod through the elastomer (for example, spring etc. the length of accessible spring and parameter such as elastic coefficient set, can confirm the settlement pressure of spring, and the process that specifically obtains settlement pressure is known for this technical field personnel), and when the effort between motion push rod and piston connecting rod equals the settlement pressure 15psi of elastomer, the pressure alarm then forms closed loop through connecting circuit and power to make the pressure alarm live working and output alarm information, thereby can let medical staff in time confirm the pressure state of nerve block, avoid the injury that the maloperation leads to, convenient to use and operate, safe and reliable.

Further, the connecting circuit comprises a negative connecting wire connected with the negative end of the power supply and a positive connecting wire connected with the positive end of the power supply, one end of the negative connecting wire is connected with the negative end of the power supply, the other end of the negative connecting wire is connected with a negative connecting piece on the end face of the piston connecting rod, the positive connecting wire is connected with the positive end of the power supply, the other end of the positive connecting wire is connected with one end of the pressure alarm, the pressure alarm is further connected with a positive connecting piece on the end face of the movement push rod, and when the acting force between the movement push rod and the piston connecting rod is equal to the set pressure of the elastic body of 15psi, the positive connecting piece on the end face of the movement push rod is contacted with the negative connecting.

Further, be equipped with printed circuit board in the casing, the integration is connected with voice broadcast module and power module on this printed circuit board, power module is used for doing pressure sensor, pressure display screen, voice broadcast module and the pressure alarm on the connecting circuit provide the electric energy.

Further, the voice broadcast module include with pressure sensor connects and is used for reading the microprocessor of pressure value, with the pronunciation chip that microprocessor connects, and with the pronunciation chip connect and by the vocal component of pronunciation chip control, the voice broadcast module still include simultaneously with the band pass filter that pronunciation chip, vocal component are connected, band pass filter's input and output respectively with pronunciation chip, vocal component electricity are connected, vocal component includes the speaker, reminds doctor's operation criticality through the speaker to avoid doctor's operation to turn to the eyes and look at pressure display screen and scatter attention, or influence current operation.

Further, the power module comprises a main power supply and a standby power supply, the main power supply is a rechargeable power supply, and the standby power supply is a dry battery. The main power supply can be a rechargeable storage battery such as a lithium battery and the like, is main power supply equipment, and can switch the standby power supply to supply power for all power utilization parts when the electric quantity of the standby power supply is too low.

Furthermore, the front end of the shell is provided with a connecting wire port, the control lead penetrates through the connecting wire port and runs in the shell, and the positive connecting wire and the negative connecting wire run in the shell.

Compared with the prior art, the utility model discloses an advantage and positive effect as follows:

an operator can control the driving mechanism to move forwards or backwards through the medicine injection button and the retraction button on the needle holding handle so as to perform injection or retraction, perform accurate positioning through a nerve stimulator or B-ultrasound, stretch the puncture needle into the positioning part, then operate the needle holding handle with one hand to perform injection or retraction, only one person is needed to complete nerve block anesthesia, and manpower is saved; and the anesthesia doctor can know the pressure dynamic state of the medicine injection, and the reference is provided for the medicine injection condition.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic structural diagram of the power plant;

FIG. 3 is a schematic view of the drive mechanism;

FIG. 4 is a schematic view of the piston rod;

FIG. 5 illustrates a collection of functional modules integrally connected to a printed circuit board;

the designations in FIGS. 1-5 have the following meanings: 1-needle holding handle, 2-needle cylinder, 3-piston rod, 4-piston handle, 5-drug injection catheter, 6-puncture needle, 7-needle wing, 8-shell, 9-needle wing fixing clip, 10-piston handle fixing clip, 11-moving groove, 12-drug injection button, 13-withdrawing button, 14-control lead, 15-pressure display screen, 16-motor, 17-lead screw, 18-nut, 19-piston connecting rod, 20-elastomer, 21-motion push rod, 22-voice broadcasting module, 23-power module, 24-microprocessor, 25-voice chip, 26-sounding element, 27-band-pass filter, 28-main power supply, 29-standby power supply and 30-connecting port, 31-pressure alarm, 32-pressure sensor.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.

In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the "front", "rear", "inside", "outside", etc. are all the directions or positional relationships shown based on the drawings, and the object is only to facilitate the description of the present invention and to simplify the description, and it is not intended to indicate or imply that the parts indicated must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention.

An automatic medicine injection device for nerve block is shown in figure 1 and comprises a power device, an injector arranged on the power device, and a needle holding handle 1;

the injector comprises a needle cylinder 2 and a piston rod 3 capable of moving in the needle cylinder 2, wherein the tail end of the piston rod 3 is provided with a piston handle 4, the front end of the needle cylinder 2 is communicated with a puncture needle 6 through a medicine injection conduit 5, the edge of the other end of the needle cylinder is provided with a needle fin 7, and the medicine injection conduit 5 runs in the needle holding handle 1;

as shown in fig. 2, the power device includes a housing 8, a driving mechanism disposed in the housing 8, a pin fin fixing clip 9 for fixing the needle cylinder 2, and a piston handle fixing clip 10 for fixing the piston handle 4, wherein the housing 8 is provided with a moving slot 11, the pin fin fixing clip 9 is fixedly disposed on the housing 8, and the piston handle fixing clip 10 is slidably disposed on the moving slot 11;

the needle holding handle 1 is provided with a medicine injection button 12 and a withdrawal button 13, and the medicine injection button 12 and the withdrawal button 13 are both connected with a driving mechanism through a control wire 14. It should be understood that in other embodiments, the injection button 12 and the withdrawal button 13 on the needle holder 1 and the driving mechanism may be wirelessly connected.

Injection device still including setting up 10 inboard pressure sensor 32 that are used for measuring injection pressure of piston handle fixing clip is in with the setting pressure display screen 15 on the casing 8, pressure sensor 32 with through signal connection between the pressure display screen 15, during the measurement injection, piston handle fixing clip 10 combines the size of cylinder 2 to the thrust of piston rod 3, converts this thrust into injection pressure.

As shown in fig. 3, the driving mechanism includes a motor 16, a lead screw 17 and a nut 18 disposed on the lead screw 17, an output shaft of the motor 16 is in transmission connection with the lead screw 17 to drive the lead screw 17 to rotate, the nut 18 is connected with the piston handle fixing clamp 10, the medicine injection button 12 is connected with a forward rotation circuit of the motor 16 through a control lead 14, and the withdrawal button 13 is connected with a reverse rotation circuit of the motor 16 through the control lead 14. Obviously, the driving mechanism is not limited to the above form, and may be other mechanisms that can provide linear motion, such as a linear motor or a rack and pinion.

As shown in fig. 4, the piston rod 3 is composed of a piston rod 19, an elastic body 20 and a moving push rod 21 which are coaxially distributed, the piston rod 19 is located in the needle cylinder 2, one end of the moving push rod 21 is connected with the piston rod 19 through the elastic body 20, the other end of the moving push rod is fixedly connected with the piston handle 4, the corresponding end between the piston rod 19 and the moving push rod 21 is adjacent to but not in contact with the end, a pressure alarm 31 is arranged on the outer end face of the piston handle 4, the pressure alarm 31 can be electrically connected with a power supply through a connection circuit, when the acting force between the moving push rod 21 and the piston rod 19 is equal to the set pressure 15psi of the elastic body 20, the pressure alarm 31 forms a closed loop with the power supply through the connection circuit, and the pressure alarm 31 can be electrically operated.

When the nerve is blocked, the nerve can be damaged by the overlarge pressure of the injection anesthetic, the piston connecting rod 19 is connected with the motion push rod 21 through the elastic body 20 with set pressure (such as a spring and the like, the set pressure of the spring can be determined through the length, the elastic coefficient and other parameters of the spring, and the process of specifically obtaining the set pressure is well known by the technical personnel), when the acting force between the motion push rod 21 and the piston connecting rod 19 is equal to the set pressure 15psi of the elastic body 20, the pressure alarm 31 forms a closed loop with a power supply through a connecting circuit, so that the pressure alarm 31 works in an electrified way and outputs alarm information, and medical personnel can determine the pressure state of the nerve block in time, thereby avoiding the damage caused by misoperation, and the nerve blocking device is convenient to use and operate, safe.

The connecting circuit includes the negative pole connecting wire of being connected with the negative pole end of power and the positive pole connecting wire of being connected with the positive pole end of power, the one end of negative pole connecting wire is connected with the negative pole end of power, and the other end is connected with the negative pole connection piece on the piston rod terminal surface, the positive pole connecting wire is connected with the positive pole end of power, and the other end is connected with the one end of pressure alarm 31, pressure alarm 31 still is connected with the positive pole connection piece on the motion push rod 21 terminal surface, when the effort between motion push rod 21 and piston rod 19 equals the settlement pressure 15psi of elastomer 20, the positive pole connection piece on the motion push rod 21 terminal surface contacts with the negative pole connection piece on the piston rod 19 terminal surface, so that form closed circuit between pressure alarm 31 and.

In specific implementation, when the acting force between the moving push rod 21 and the piston connecting rod 19 is greater than or equal to the set pressure 15psi of the elastic body 20, the positive connecting piece on the end face of the moving push rod 21 will contact with the negative connecting piece on the end face of the piston connecting rod 19. Under normal conditions, the elastic body 20 can not contact with the negative connecting piece and the positive connecting piece, and the negative connecting piece and the positive connecting piece are just distributed correspondingly, so that the negative connecting piece and the positive connecting piece can correspondingly contact and realize a corresponding electric connection state.

Be equipped with printed circuit board in the casing 8, as shown in fig. 5, the integration is connected with voice broadcast module 22 and power module 23 on this printed circuit board, power module 23 is used for doing pressure sensor 32, pressure display screen 15, voice broadcast module 22 and the pressure alarm 31 on the connecting circuit provide the electric energy.

Voice broadcast module 22 include with pressure sensor 32 connects and is used for reading the microprocessor 24 of pressure value (pressure sensor 32 with microprocessor 24's input electricity is connected), with the pronunciation chip 25 that microprocessor 24 is connected (microprocessor 24's output with pronunciation chip 25's input electricity is connected), and with pronunciation chip 25 connect and by pronunciation element 26 that pronunciation chip 25 controlled (pronunciation chip 25's output with pronunciation element 26 electricity is connected), voice broadcast module 22 is used for the broadcast the injection pressure value that pressure sensor 32 detected, microprocessor 24's output specifically is with pronunciation chip 25's input: microprocessor 24 reads the injection pressure value that pressure sensor 32 detected, the injection pressure value is the digital instruction form to send to pronunciation chip 25, a small amount of memory space are put to pronunciation chip 25, receive store in its ROM behind the digital instruction, turn into voice signal with the digital instruction in the ROM again, and send to vocal component 26, vocal component 26 broadcasts this voice signal, and the anaesthesia doctor then can directly obtain its pressure value through listening to the pronunciation, voice broadcast module 22 still include simultaneously with the band pass filter 27 that pronunciation chip 25, vocal component 26 are connected, band pass filter 27's input and output respectively with pronunciation chip 25, vocal component 26 electricity are connected, vocal component 26 includes speaker 27, reminds doctor's operation criticality through speaker 27 to avoid doctor's operation to change the eye and look over pressure display screen and scatter the attention, or the current operation is influenced, so that an anaesthetist is reminded of the risk of injuring nerves, and then the anaesthetist determines whether to continue injection or to adjust the position and then inject according to the real-time situation.

The power module 23 comprises a main power supply 28 and a standby power supply 29, wherein the main power supply 28 is a rechargeable power supply, and the standby power supply 29 is a dry battery. The main power supply 28 may be a rechargeable battery such as a lithium battery, which is a main power supply device, and when the standby power supply 29 is too low, the standby power supply 29 may be switched to supply power to each power consuming component.

The front end of the shell 8 is provided with a connecting wire port 30, the control lead 14 passes through the connecting wire port 30 and runs in the shell 8, and the positive connecting wire and the negative connecting wire run in the shell 8.

When the utility model is used, the configured local anesthetic is extracted in advance by the injector and is fixed on the power device, namely, the pin fin 7 of the injector is clamped on the pin fin fixing clamp 9, the piston handle 4 of the injector is clamped on the piston handle fixing clamp 10, the injection catheter 5 is sleeved on the injector head, one end of the control wire 14 is inserted into and passes through the connecting wire port 30 on the power device, a hand-held ultrasonic probe displays a stagnation point, the thumb of the hand holds the pin handle, the puncture needle point is operated under the ultrasonic guidance to reach the stagnation point, the index finger presses the withdrawal button 13, the piston handle fixing clamp 10 moves rightwards, the piston handle 4 is dragged to move rightwards, negative pressure is generated in the needle cylinder 2, whether blood returns in the pressure display screen 15 on the power device and the injection catheter 5 or not is observed, if the needle point does not mistakenly enter a blood vessel without blood return indication, the index finger presses the injection button 12, the piston handle fixing clamp 9 of the injector moves leftwards, the piston handle 4 is pushed to inject the medicine, if the medicine injection effect is not ideal under the ultrasonic wave, the needle point position can be adjusted and the medicine injection operation is repeated to achieve the ideal medicine injection effect.

The above-mentioned embodiment is only the preferred embodiment of the present invention, all the basis the utility model discloses a technical entity all belongs to the utility model discloses any simple modification, modification and substitution change to what the above embodiment was done the within range of technical scheme.

Claims

1. An automatic medicine injection device for nerve block is characterized by comprising a power device, an injector arranged on the power device and a needle holding handle;

2. The automatic drug injection device for nerve block of claim 1, further comprising a pressure sensor disposed inside the piston stem fixing clip for measuring injection pressure and a pressure display screen disposed on the housing, wherein the pressure sensor and the pressure display screen are connected by an electrical signal.

3. The automatic drug injection device for nerve block of claim 1, wherein the driving mechanism comprises a motor, a lead screw and a nut arranged on the lead screw, an output shaft of the motor is in transmission connection with the lead screw to drive the lead screw to rotate, the nut is connected with the piston handle fixing clamp, the drug injection button is connected with a forward rotation circuit of the motor through a control lead, and the withdrawal button is connected with a reverse rotation circuit of the motor through a control lead.

4. The automatic medicine injection device for nerve block according to claim 2, wherein the piston rod is composed of a piston connecting rod, an elastic body and a moving push rod which are coaxially distributed, the piston connecting rod is located in the needle cylinder, one end of the moving push rod is connected with the piston connecting rod through the elastic body, the other end of the moving push rod is fixedly connected with the piston handle, a pressure alarm is arranged on the outer end face of the piston handle, the pressure alarm can be electrically connected with a power supply through a connecting circuit, and when the acting force between the moving push rod and the piston connecting rod is equal to the set pressure of the elastic body of 15psi, the pressure alarm forms a closed loop with the power supply through the connecting circuit, so that the pressure alarm works electrically and outputs alarm information.

5. The automatic drug injection device for nerve block of claim 4, wherein the connection circuit comprises a negative connection line connected to the negative terminal of the power supply and a positive connection line connected to the positive terminal of the power supply, one end of the negative connection line is connected to the negative terminal of the power supply, and the other end is connected to the negative connection pad on the end face of the piston rod, the positive connection line is connected to the positive terminal of the power supply, and the other end is connected to one end of the pressure alarm, the pressure alarm is further connected to the positive connection pad on the end face of the motion push rod, and when the acting force between the motion push rod and the piston rod is equal to the set pressure of the elastic body of 15psi, the positive connection pad on the end face of the motion push rod contacts with the negative connection pad on the end face of the piston rod, so that a closed loop is.

6. The automatic drug injection device for nerve block of claim 4, wherein a printed circuit board is disposed in the housing, a voice broadcast module and a power module are integrally connected to the printed circuit board, and the power module is used for providing electric energy for the pressure sensor, the pressure display screen, the voice broadcast module and a pressure alarm on the connection circuit.

7. The automatic medicine injection device for nerve block of claim 6, wherein the voice broadcast module includes a microprocessor connected with the pressure sensor and used for reading the pressure value, a voice chip connected with the microprocessor, and a voice element connected with the voice chip and controlled by the voice chip, the voice broadcast module further includes a band-pass filter connected with the voice chip and the voice element, the input end and the output end of the band-pass filter are respectively electrically connected with the voice chip and the voice element, and the voice element includes a speaker.

8. The automatic drug injection device for nerve block of claim 6, wherein the power supply module comprises a main power supply and a backup power supply, the main power supply is a rechargeable power supply, and the backup power supply is a dry battery.

9. The automatic drug injection device for nerve block of claim 5, wherein the front end of the housing is provided with a connection port, the control wire passes through the connection port and runs in the housing, and the positive connection wire and the negative connection wire run in the housing.