CN218980252U - Nerve plexus stimulating electrode and nerve stimulating system - Google Patents
Nerve plexus stimulating electrode and nerve stimulating system Download PDFInfo
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- CN218980252U CN218980252U CN202223036990.3U CN202223036990U CN218980252U CN 218980252 U CN218980252 U CN 218980252U CN 202223036990 U CN202223036990 U CN 202223036990U CN 218980252 U CN218980252 U CN 218980252U
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Abstract
The utility model provides a nerve plexus stimulating electrode, which comprises a three-way handle, an outer tube, an inner needle core and a connector; the three-way handle is provided with an electrode channel and an injection channel for communicating the electrode channel with an external transfusion system; the inner needle core is arranged along the axial direction of the electrode channel, and the proximal end of the inner needle core is connected with the proximal end of the electrode channel in a sealing way; the outer tube gap is sleeved on the outer side of the inner needle core and fixedly sleeved on the far end of the electrode channel; the distal end of the inner needle core is positioned outside the outer tube; the proximal end of the inner needle core is electrically connected with a corresponding port of the connector; a flow sensor mounted within the injection channel and electrically connected to a corresponding port of the connector; the utility model also provides a nerve stimulation system, which outputs an electric signal reflecting the action of a human body through the pressure sensor array, and judges the distal end position of the inner needle core by combining with micro current stimulation, thereby realizing the accurate positioning of the puncture part and avoiding the complication of puncturing or damaging nerves.
Description
Technical Field
The utility model relates to the field of medical equipment, in particular to a nerve plexus stimulating electrode and a nerve stimulating system.
Background
Peripheral nerve stimulation therapy can alter the lives of many patients. For many chronic pain patients, appropriate neural stimulation is safe and effective, and technological improvements and clinical evidence will expand the application of neural stimulation, a non-pharmacological non-invasive analgesic approach. The current with certain intensity and frequency is released by the needle tip of the puncture needle to stimulate the sensory nerve, the transmission of pain nerve signals is blocked, and then anesthetic is injected into the proper position to anesthetize the nerve, so that the pain relieving effect is achieved. Injection of anesthetic throughout the process of penetration, the existing injection method of anesthetic generally uses an injection needle to inject anesthetic beside the penetration port, resulting in inconvenient treatment operation. Meanwhile, because the doctor's experience is relied on to judge whether the needle tip position of the injection needle reaches the proper position, the method is difficult to accurately position the injection position, the nerve injury is easy to cause, and when the anesthesia dose is too large, the adverse complications are also easy to be caused.
On the other hand, the conventional nerve plexus stimulating electrode uses weak current to stimulate nerve plexus in human tissue to cause the action of the body to locate the puncture site. The operator judges the distance between the nerve plexus stimulating electrode and the painful nerve by visually observing the action feedback of the patient body. The method can meet clinical requirements to a certain extent, but the feedback of the nerve at different parts of the patient to the stimulation current is different. For some parts which can only generate slight feedback, the user cannot observe the action of the body by naked eyes or judge that the neural stimulation position error obtained by naked eyes is high.
Chinese patent CN201520172889.1 discloses a visual nerve plexus stimulator, which combines the direct vision of an ultrasonic diagnostic apparatus with the accuracy and precision of nerve plexus stimulating pulses, and integrates two medical diagnostic apparatuses on one apparatus for use, while observing the relative positions of nerves and stimulating electrodes through ultrasonic images, and while performing electric pulse stimulation on target nerves through nerve plexus needles, the objective response of the patient's body can be directly observed.
Chinese patent CN202110772387.2 discloses a nerve stimulating electrode and a stimulating device. The nerve stimulating electrode includes a tube and a guidewire. The pipe body comprises a plurality of containing holes which penetrate through the pipe body along the axial direction of the pipe body, the guide wires are in one-to-one correspondence with the containing holes, and penetrate through the containing holes and are subjected to glue filling treatment so as to fill gaps between the corresponding guide wires and the containing holes. So set up, through the seal wire with the accommodation hole wears to establish, not only can make nerve stimulating electrode's manufacturing process is simple, and each seal wire can keep apart each other, and signal transmission can not be disturbed, finally, through the encapsulating processing can also make the seal wire can firmly be fixed in the seal wire.
Chinese patent application CN202210130156.6 discloses a nerve stimulating electrode, a nerve stimulating device and a nerve stimulating system, the nerve stimulating electrode comprising: an electrode housing comprising a hollow tube, and a stimulation tip disposed inside the electrode housing and configured to conduct electrical stimulation energy to a tissue surface to electrically stimulate the tissue and collect electrical signals of the tissue, wherein the stimulation tip is movable within the electrode housing along an axial direction of the electrode housing and/or the stimulation tip is rotatable within the electrode housing along a circumferential direction of the electrode housing. According to the nerve stimulation electrode, electrical stimulation can be performed on different parts of organism tissues by using fewer stimulation contacts, and accurate stimulation is realized by collecting and analyzing electrical signals of different parts.
Disclosure of Invention
The utility model aims to: the utility model aims to solve the problem of providing a nerve plexus stimulating electrode and a nerve stimulating system aiming at the defects of the prior art.
In order to solve the technical problem, in a first aspect, the utility model provides a nerve plexus stimulating electrode, which comprises a three-way handle, an outer tube, an inner needle core and a connector. The three-way handle is provided with an electrode channel and an injection channel for communicating the electrode channel with an external infusion system. The inner needle core is arranged along the axial direction of the electrode channel, and the proximal end of the inner needle core is in sealing connection with the proximal end of the electrode channel. The outer tube gap sleeve is arranged on the outer side of the inner needle core and fixedly sleeved on the far end of the electrode channel. The distal end of the inner core is located outside the outer tube. The proximal end of the inner core is electrically connected with the connector.
According to the utility model, after the effect of the local anesthetic injected at a time is invalid, the medicament such as the anesthetic can be injected to the nerve point in a short distance through the injection channel, the electrode channel and the runner between the inner needle core and the outer tube, so that the requirement of long-time operation on anesthesia is met.
Further, the nerve plexus stimulating electrode further comprises a flow sensor mounted in the injection channel and electrically connected to the connector.
According to the nerve plexus stimulating electrode of the present application, a flow sensor is provided in the injection channel for measuring the flow of the agent actually flowing through the injection channel and providing an output signal of the flow sensor.
Further, the three-way handle also comprises a luer connector which is used for being connected with an infusion apparatus of an external infusion system, and a liquid inlet of the luer connector is communicated with the injection channel.
Further, the tee handle is provided with a non-locking switch, and the inner needle core is electrically connected with the connector through the non-locking switch.
According to the nerve plexus stimulating electrode, the on-off state of the electric connection between the inner needle core and the corresponding port of the connector is controlled through the non-locking switch, so that an operator can control the output of the energy of the nerve plexus stimulating electrode in real time in the using process.
Further, the non-locking switch is mounted on the outer wall of the three-way handle opposite the injection channel.
Further, an insulating lubricating coating is arranged on the outer surface of the outer tube.
Further, the distance a between the distal end of the inner needle core and the distal end of the outer tube is 5-10 mm.
Further, the distal end of the inner needle core is in a triangular pyramid or cone structure.
Further, the outer tube is coaxially sleeved on the outer side of the inner needle core.
In a second aspect, the present utility model provides a nerve stimulation system, which includes at least one nerve plexus stimulation electrode as described above and a nerve stimulation device, wherein the nerve stimulation device includes a feedback receiving module, a display feedback module, and an infusion control module.
The nerve plexus stimulating electrode is electrically connected with the display feedback module through a connector. The feedback receiving module and the transfusion control module are respectively and electrically connected with the display feedback module.
The feedback receiving module comprises a negative plate and a pressure sensor array arranged on the negative plate, the negative plate and the nerve plexus stimulating electrode form a current release loop, the nerve plexus stimulating electrode is used for outputting stimulating current signals, and the pressure sensor array is used for sensing body actions and converting the body actions into corresponding current signals.
The display feedback module is used for receiving and amplifying and displaying the current signal output by the pressure sensor array, receiving and displaying the stimulating current signal output by the nerve plexus stimulating electrode and the medicament flow output by the flow sensor.
The infusion control module is used for automatically stopping infusion according to the infusion quantity preset by an operator based on the punctured nerve part and the medicament flow detected by the flow sensor.
For the position that can only produce slight feedback and lead to the operator unable to observe limbs action through naked eyes, the nerve stimulation system of this application passes through the electric current signal of pressure sensor array output response organism action, combines micro current stimulation, judges the distal end position of interior needle core, improves the accuracy of puncture position location, avoids the easy complication of puncturing or damage nerve.
The beneficial effects are that:
(1) The nerve plexus stimulating electrode provided by the utility model adopts a three-way handle, the three-way handle is provided with an electrode channel and an injection channel used for communicating the electrode channel with an external infusion system, and the proximal end of the inner needle core is in sealing connection with the proximal end of the electrode channel. The outer tube is sleeved outside the inner needle core in a clearance way and fixedly sleeved at the far end of the electrode channel, and finally a flow channel for conveying the medicament to the puncture part is formed, so that the nerve plexus stimulating electrode has the functions of puncturing and current transmission of the traditional stimulating electrode and simultaneously has the function of newly injecting the medicament. After the effect of the local anesthetic injected for a single time is invalid, the utility model can inject the medicament such as the anesthetic to the nerve point in a short distance through the injection channel, the electrode channel and the flow channel between the inner needle core and the outer tube so as to meet the requirement of long-time operation on anesthesia;
(2) The nerve plexus stimulating electrode of some embodiments of the utility model provides a flow sensor within the injection channel, the flow sensor configured to provide an output signal of the flow sensor based on the flow of the medicament through the injection channel;
(3) According to some embodiments of the utility model, the on-off state of the electrical connection between the inner needle core and the connector is controlled through the non-locking switch, so that an operator can control the output of the energy of the nerve plexus stimulating electrode in real time in the using process;
(4) According to some embodiments of the utility model, the outer surface of the outer tube is coated with the insulating lubricating coating, so that current overflow is effectively prevented, and resistance generated by mutual friction between the outer surface of the outer tube and human tissues in the puncturing process is reduced;
(5) Some embodiments of the utility model provide for the distal end of the inner core to be in a triangular pyramid or cone configuration to reduce penetration resistance;
(6) Compared with the mode of combining nerve plexus stimulation pulses with naked eye observation in the prior art, the nerve stimulation system provided by the utility model senses the action generated when the weak current stimulates the body through the pressure sensor array and converts the body action into corresponding current signals, and receives the current signals output by the pressure sensor array through the display feedback module and performs amplification display, so that an operator can intuitively observe the electric signals fed back by the system in response to the body action, and objectively, directly and accurately judge whether the puncture part of the electrode is muscle tissue or nerve edge; for parts which can only generate slight feedback and cause an operator to be unable to observe limb movements through naked eyes, the utility model can effectively improve the accuracy of judging the puncture positions of the parts and avoid complications of easy puncture or damage to nerves;
(7) The nerve stimulation system provided by the utility model is provided with the infusion control module which is used for automatically adjusting the set infusion amount according to the part selected by an operator and automatically stopping infusion according to the medicament flow detected by the flow sensor.
Drawings
The foregoing and/or other advantages of the utility model will become more apparent from the following detailed description of the utility model when taken in conjunction with the accompanying drawings and detailed description.
FIG. 1 is a schematic perspective view of a nerve plexus stimulating electrode of the present application;
FIG. 2 is a cross-sectional view of one of the nerve plexus stimulating electrodes shown in FIG. 1;
FIG. 3 is a partial enlarged view A of FIG. 2;
fig. 4 is a partial enlarged view B in fig. 2;
fig. 5 is a block diagram of a neural stimulation system of the present application.
Detailed Description
The reference numerals of the present utility model are as follows: three-way handle 100, electrode channel 110, injection channel 120, luer fitting 130, liquid inlet 131, outer tube 200, inner needle 300, connector 400, flow sensor 500, non-locking switch 600, nerve stimulation device 700, feedback receiving module 710, negative plate 711, display feedback module 720, infusion control module 730.
The proximal end refers to the end adjacent to the operator, i.e. the side away from the human tissue penetrated by the nerve plexus stimulating electrode, during surgery; distal refers to the end that is distal to the operator during surgery, i.e., the side of the body tissue that is proximal to the nerve plexus stimulating electrode penetration.
Referring to fig. 1 to 3, the present utility model discloses a nerve plexus stimulating electrode 000 comprising a three-way handle 100, an outer tube 200, an inner needle 300 and a connector 400. As shown in fig. 3, the three-way handle 100 is provided with an electrode channel 110 and an injection channel 120 for communicating the electrode channel 110 with an external infusion system. As shown in fig. 2, the inner core 300 is disposed along the axial direction of the electrode channel 110, and the proximal end of the inner core 300 is sealingly connected to the proximal end of the electrode channel 110. The outer tube 200 is arranged at the outer side of the inner needle core 300 in a clearance sleeved mode and fixedly sleeved at the distal end of the electrode channel 110. The distal end of the inner core 300 is located outside the outer tube 200. The connector 400 is provided with more than one port and the proximal end of the inner core 300 is electrically connected to a corresponding port of the connector 400.
Referring to fig. 2 and 3, the outer diameter of the inner core 300 is smaller than the inner diameter of the outer tube 200, thereby forming a flow path therebetween for the passage of the medicament. The medicament sequentially passes through the injection channel 120, the electrode channel 110, and the flow channel between the inner core 300 and the outer tube 200, and then enters the puncture site.
By the arrangement, after the effect of the local anesthetic injected once is disabled, the medicament such as the anesthetic can be injected to the nerve point in a short distance through the injection channel 120, the electrode channel 110 and the flow channel between the inner needle 300 and the outer tube 200, thereby meeting the requirement of long-time operation on anesthesia.
In some embodiments, referring to fig. 2, a flow sensor 500 is also included, the flow sensor 500 being mounted within the injection channel 120 and electrically connected with a corresponding port of the connector 400.
The nerve plexus stimulating electrode of the present embodiment is provided with a flow sensor 500 in the injection channel 120, and the flow sensor 500 is used for measuring the flow rate of the medicament actually flowing through the injection channel 120 and providing an output signal of the flow sensor 500.
In some embodiments, referring to fig. 2, the three-way handle 100 further includes a luer fitting 130 for connection to an infusion set of an external infusion system, the fluid inlet 131 of the luer fitting 130 being in communication with the injection channel 120.
In some embodiments, referring to fig. 2, the three-way handle 100 is mounted with a non-locking switch 600, and the inner core 300 is electrically connected with a corresponding port of the connector 400 through the non-locking switch 600.
The present embodiment controls the on-off state of the electrical connection between the inner needle 300 and the corresponding port of the connector 400 through the non-locking switch 600, so that an operator can control the output of the nerve plexus stimulating electrode 000 energy in real time during the use process. In this embodiment, the operator controls the stimulation current signal output from the distal end of the nerve plexus stimulating electrode 000 in real time during use.
In some embodiments, referring to fig. 2, a non-locking switch 600 is mounted on the exterior wall of the three-way handle 100 opposite the injection channel 120.
In some embodiments, the outer tube 200 may be hollow tubular and employ SUS304 stainless steel material. The outer surface of the outer tube 200 is coated with an insulating and lubricating coating such as PTFE, not shown.
The present embodiment prevents the current from overflowing by providing an insulating lubricant coating on the outer surface of the outer tube 200, and simultaneously reduces the resistance generated by the mutual friction between the outer surface of the outer tube 200 and the human tissue during the penetration process.
In some embodiments, referring to fig. 2 and 4, the distal end of the inner core 300 extends beyond the distal end of the outer tube 200 by a distance a of 5 to 10 millimeters.
In some embodiments, referring to fig. 2 and 4, to reduce penetration resistance, the distal end of the inner core 300 is in a triangular pyramid or cone configuration.
In some embodiments, referring to fig. 2, the outer tube 200 is coaxially sleeved outside of the inner core 300.
Referring to fig. 5, the present utility model also discloses a nerve stimulation system, which includes a nerve stimulation device 700 and a nerve plexus stimulation electrode 000, wherein the nerve stimulation device 700 includes a feedback receiving module 710, a display feedback module 720 and an infusion control module 730.
The feedback receiving module 710 includes a negative plate 711 and a pressure sensor array mounted on the negative plate 711. The negative electrode plate 711 can be attached to a portion of the nerve endings of the patient where the body motion is most likely to occur. The negative plate 711 forms a current release circuit with the nerve plexus stimulating electrode 000, the nerve plexus stimulating electrode 000 is used for outputting a stimulating current signal, and the pressure sensor array is used for sensing the body motion and outputting a corresponding current signal.
The display feedback module 720 is configured to receive and amplify the current signal output by the pressure sensor array, and receive and display the stimulation current signal output by the nerve plexus stimulating electrode 000 and the medicament flow output by the flow sensor 500.
The infusion control module 730 is used to automatically stop infusion according to the amount of infusion preset by the operator based on the punctured nerve site and the flow rate of the medicine detected by the flow sensor 500.
The magnitude of the current signal output by the pressure sensor array can reflect the magnitude of the body action, so that the distance from the current puncture position to the nerve is judged. When the stimulation current signal output by the distal end of the nerve plexus stimulating electrode 000 is fixed, the closer the distance between the distal end of the nerve plexus stimulating electrode 000 and the nerve is, the larger the current signal output by the pressure sensor array is.
When the distal end of nerve plexus stimulating electrode 000 is positioned in a nearest and relatively safe location near the nerve, the current signal output by the pressure sensor array will reach a predetermined maximum current value for the body motion translating electrical signal. The maximum current value of the preset body motion translating electrical signal can be obtained from a large amount of clinical data.
In some embodiments, the neurostimulation system is configured for presetting a maximum current value of the body motion translating electrical signal based on the punctured nerve site, and the system sends an alert signal to the operator when the current signal output by the pressure sensor array received by the display feedback module 720 reaches the preset maximum current value of the body motion translating electrical signal.
In some embodiments, automatically stopping infusion based on the flow of medicament detected by the flow sensor 500 refers to: when the medicine flow detected by the flow sensor 500 reaches the set infusion amount, the infusion is automatically stopped, and the safety of the infusion is ensured.
The display feedback module 720 employed in the present utility model may have the following characteristics: the response speed is less than or equal to 1ms, the recovery time is less than or equal to 15ms, the measurement accuracy is less than or equal to 0.1N, the pressure curve can be displayed in real time, and meanwhile, multiple batches of data can be stored.
The pressure sensor array of the present utility model may employ a large area full fabric pressure sensor array. The sensor has high sensitivity (14.4 kPa) -1 ) Low detection limit (2 Pa), quick response (about 24 ms), low power consumption<6 μW) and mechanical stability; due to these advantages, textile sensors have proven to be able to recognize finger movements, gestures, acoustic vibrations and real-time pulse waves, see Liu, m; pu, x; * Jiang, c.; liu, t.; huang, x.; chen, l.; du, c.; sun, j.; hu, w; wang, Z.L.large-Area All-Textile Pressure Sensors for Monitoring Human Motion and Physiological signs.advanced Materials 2017,29,1703700.
The working principle of the utility model is that the pressure sensor array is arranged on the negative plate 711, the pressure sensor array is configured to sense the body motion and output corresponding current signals, the current signals output by the pressure sensor array are amplified by the display feedback module 720 and then displayed, so that the pressure signals are visualized, an operator can visually observe the body motion which is not easy to perceive by naked eyes through the display equipment of the display feedback module 720, such as a display screen, and then the current puncture position is accurately judged by combining the magnitude of the current signals output by the pressure sensor array.
The working process of the system of the utility model is as follows: the operator turns on the nerve stimulation device 700 to preset the dosage of the injected medicine according to the nerve site selected to be punctured; before puncturing, an operator attaches the negative plate 711 provided with the pressure sensor array to a corresponding nerve part which is most likely to generate body motion and keeps the pressure sensor array closely attached to skin; an operator holds the nerve plexus stimulating electrode 000 to puncture the needle, briefly presses the non-locking switch 600, and the nerve plexus stimulating electrode 000 outputs weak stimulating current, and simultaneously, the operator objectively, directly and accurately observes the current signals output by the pressure sensor array through the display device, such as a display screen, of the nerve stimulating device 700; when the current signal reaches the maximum current value of the body motion translating electrical signal corresponding to the neural site of penetration, the distal end of the nerve plexus stimulating electrode 000 reaches the intended penetration site. Subsequently, the infusion control module 730 is activated, and the infusion control module 730 selects a preset infusion amount according to the nerve site selected by the operator for puncturing and automatically stops the infusion according to the medicine flow rate detected by the flow sensor 500 and the set infusion amount. After the infusion is completed, the operator pulls out the nerve plexus stimulating electrode 000.
The utility model provides a nerve plexus stimulating electrode and a nerve stimulating system thought and method, and the method and the way for realizing the technical scheme are numerous, the above is only a preferred embodiment of the utility model, and it should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of the utility model, and the improvements and modifications should be regarded as the protection scope of the utility model. The components not explicitly described in this embodiment can be implemented by using the prior art.
Claims (10)
1. A nerve plexus stimulating electrode, which is characterized by comprising a three-way handle (100), an outer tube (200), an inner needle core (300) and a connector (400); the three-way handle (100) is provided with an electrode channel (110) and an injection channel (120) for communicating the electrode channel (110) with an external transfusion system; the inner needle core (300) is arranged along the axial direction of the electrode channel (110), and the proximal end of the inner needle core (300) is in sealing connection with the proximal end of the electrode channel (110); the outer tube (200) is sleeved outside the inner needle core (300) in a clearance way and fixedly sleeved at the far end of the electrode channel (110); the distal end of the inner needle core (300) is positioned outside the outer tube (200); the proximal end of the inner core (300) is electrically connected to the connector (400).
2. The nerve plexus stimulating electrode of claim 1, further comprising a flow sensor (500), the flow sensor (500) being mounted within the injection channel (120) and electrically connected to the connector (400).
3. The nerve plexus stimulating electrode of claim 2, wherein the three-way handle (100) further comprises a luer fitting (130) for connection to an infusion set of an external infusion system, the liquid inlet (131) of the luer fitting (130) being in communication with the injection channel (120).
4. A nerve plexus stimulating electrode according to claim 3, wherein said three-way handle (100) is fitted with a non-locking switch (600), and said inner needle (300) is electrically connected to a corresponding port of the connector (400) through the non-locking switch (600).
5. The nerve plexus stimulating electrode of claim 4 wherein said non-locking switch (600) is mounted on an outer wall of the three-way handle (100) opposite said injection channel (120).
6. The nerve plexus stimulating electrode of claim 5, wherein the outer surface of the outer tube (200) is provided with an insulating lubricious coating.
7. The nerve plexus stimulating electrode of claim 6, wherein the distal end of the inner needle (300) extends beyond the distal end of the outer tube (200) by a distance a of 5-10 mm.
8. The nerve plexus stimulating electrode of claim 7, wherein the distal end of the inner needle (300) has a triangular pyramid or cone structure.
9. The nerve plexus stimulating electrode of claim 8, wherein the outer tube (200) is coaxially sleeved outside the inner core (300).
10. A nerve stimulation system comprising the nerve plexus stimulation electrode (000) of any one of claims 2-9 and a nerve stimulation device (700), the nerve stimulation device (700) comprising a feedback receiving module (710), a display feedback module (720), and an infusion control module (730);
the nerve plexus stimulating electrode (000) is electrically connected with the display feedback module (720) through the connector (400); the feedback receiving module (710) and the transfusion control module (730) are respectively and electrically connected with the display feedback module (720);
the feedback receiving module (710) comprises a negative plate (711) and a pressure sensor array mounted on the negative plate (711), wherein the negative plate (711) and the nerve plexus stimulating electrode (000) form a current release loop, the nerve plexus stimulating electrode (000) is used for outputting a stimulating current signal, and the pressure sensor array is used for sensing the action of a human body and outputting a corresponding current signal;
the display feedback module (720) is used for receiving and amplifying and displaying the current signal output by the pressure sensor array, receiving and displaying the stimulation current signal output by the nerve plexus stimulation electrode (000) and the medicament flow output by the flow sensor (500);
the infusion control module (730) is used for automatically stopping infusion according to the infusion amount preset by an operator based on the punctured nerve part and the medicament flow detected by the flow sensor (500).
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| CN202223036990.3U CN218980252U (en) | 2022-11-15 | 2022-11-15 | Nerve plexus stimulating electrode and nerve stimulating system |
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| CN202223036990.3U CN218980252U (en) | 2022-11-15 | 2022-11-15 | Nerve plexus stimulating electrode and nerve stimulating system |
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