An apparatus for monitoring neuroelectrophysiological signals

Abstract

The application provides a device for monitoring nerve electrophysiological signals, comprising a catheter, the catheter having a first end and a second end, a through hole being arranged on the catheter, the through hole being located between the first end and the second end; a capsule being sleeved on the catheter; a receiver, the receiver having a signal receiving end and a lead wire, the signal receiving end being arranged at the first end and closing a front end of the capsule and the first end, the lead wire being arranged in the catheter and leading out nerve electrophysiological signals received by the signal receiving end; a buckle ring being sleeved on the second end and closing a rear end of the capsule and the second end. The signal receiving end is arranged at the first end of the catheter, so that the nerve electrical signals can be directly monitored, and the lead wire leads out the monitored electrical signals through the catheter, so that the monitoring accuracy is high and the operation is convenient.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a device for monitoring neurophysiological signals. Background Technology

[0002] The trigeminal nerve is a mixed nerve, the fifth cranial nerve, and the largest nerve in the face. It contains both general somatic sensory fibers and special visceral motor fibers. It controls sensation in the face, mouth, and nasal cavity, as well as movement of the masticatory muscles, and transmits sensory information from the head to the brain. The trigeminal nerve is formed by the confluence of the ophthalmic branch (first branch), the maxillary branch (second branch), and the mandibular branch (third branch), which respectively control sensation above the palpebral fissure, between the palpebral fissure and the oral fissure, and below the oral fissure, as well as contraction of the masticatory muscles. The trigeminal nerve is the largest nerve in the face; its motor portion exits the brain at the junction of the pons and the pontine brachii, then merges with the mandibular nerve, and together they exit the skull through the foramen ovale. The cell bodies of its sensory portion form the trigeminal ganglion located at the tip of the petrous part of the temporal bone.

[0003] The pathways for pain, temperature, and touch sensations in the head and face: Superficial sensations in the head and face are transmitted via the trigeminal nerve. The first-order sensory neurons are located in the trigeminal ganglion, and their dendrites form sensory fibers within the trigeminal nerve, distributing to the skin sensations of the head and face. After the axons enter the pons via the trigeminal nerve root, the fibers transmitting touch terminate at the main sensory nucleus of the trigeminal nerve, while the fibers transmitting pain and temperature terminate at the spinal trigeminal nucleus. Both are second-order neurons. After synapsing, the fibers cross over to the opposite side and ascend to form the trigeminothalamic tract, which passes through various parts of the brainstem and terminates at the ventroposteromedial nucleus of the dorsal thalamus (third-order neurons). The fibers after synapsing participate in forming the thalamocortical tract, which projects through the internal capsule to the sensory area in the lower 1 / 3 of the postcentral gyrus.

[0004] Trigeminal neuralgia is a neurological disorder characterized by recurrent, brief episodes of intense, electric shock-like or needle-like pain in the distribution area of ​​one or more branches of the trigeminal nerve in the head and face. Attacks often occur when the patient speaks, chews, brushes their teeth, or experiences hot or cold stimuli to the face. Currently, trigeminal nerve balloon compression surgery utilizes a balloon expanded within the McMurray cavity to compress the trigeminal nerve's semilunar node, thereby disrupting its pain transmission function and achieving a pain blockade effect. While the balloon mechanically compresses the trigeminal nerve fibers, damaging the pain-sensing nerve fibers, the tactile and motor nerve fibers of the trigeminal nerve are also affected simultaneously. Therefore, the pain, tactile, and motor nerve signals in the trigeminal nerve region will change before and after surgery. Current research suggests that pain-sensing nerve fibers are more sensitive to pressure than tactile and motor nerve fibers. Therefore, surgeons, based on experience, determine the appropriate balance between the degree of surgical compression and the damage to pain-sensing nerve fibers and other nerve fibers. In this way, while blocking pain transmission, damage to tactile and motor nerve fibers is minimized, thereby reducing and avoiding postoperative adverse reactions. Currently, surgeons primarily determine the surgical procedure based on two indicators: the formation of the ideal balloon shape (e.g., pear shape) during the operation and the duration of nerve compression by the balloon. However, controlling the balloon shape is challenging. Surgeons mainly rely on imaging to determine whether the balloon has inflated to the ideal shape (e.g., pear shape). This assessment of balloon inflation is heavily influenced by the surgeon's subjective factors, making quantitative diagnosis impossible. Consequently, treatment outcomes vary significantly between different surgeons, and even between different patients treated by the same surgeon.

[0005] The electrodes on the existing balloon catheter cannot directly monitor the pain nerve signals of the trigeminal nerve in real time throughout the entire surgical process. Additional recording electrodes are required, and they can only record changes in motor nerve signals (electromyography changes of masticatory muscles) in the trigeminal nerve before and after surgical compression, resulting in inaccurate test signals and complicated and inconvenient surgical procedures. Summary of the Invention

[0006] The purpose of this invention is to provide a device for monitoring neurophysiological signals, which can directly monitor signals through a receiver, with high monitoring accuracy and convenient operation.

[0007] To achieve the above objectives, in a first aspect, the present invention provides a device for monitoring neurophysiological signals, comprising: a catheter having a first end and a second end, the catheter having a through hole located between the first end and the second end; a capsule fitted onto the catheter; a receiver having a signal receiving end and a wire, the signal receiving end being located at the first end and closing the front end of the capsule to the first end, the wire being disposed within the catheter to export the neurophysiological signals received by the signal receiving end; and a buckle fitted onto the second end and closing the rear end of the capsule to the second end.

[0008] The beneficial effects of this invention are as follows: by sealing the front end of the capsule with the first end of the catheter, attaching a buckle to the second end, and sealing the rear end of the capsule with the second end of the catheter, liquid can be introduced through the through-hole of the catheter, allowing the capsule to form a sac-like shape. A lead wire guides the neurophysiological signals received by the signal receiving end through the catheter. By placing the signal receiving end at the first end of the catheter, neuroelectrical signals can be directly monitored, resulting in high monitoring accuracy and convenient operation.

[0009] Optionally, the catheter includes a core tube and an outer tube; the core tube is disposed inside the outer tube, and the core tube has an independent wire guide cavity and a liquid inlet cavity. The wire guide cavity is used to guide the wire out, and the liquid inlet cavity is used for liquid inlet and venting; the through-hole includes a first through-hole and a second through-hole, the first through-hole being disposed in the liquid inlet cavity and the second through-hole being disposed in the outer tube. Its advantages are: the wire guide cavity is used to guide the wire out, avoiding liquid immersion in the wire, which could lead to leakage and inaccurate monitoring. The liquid inlet cavity is used for liquid inlet and venting, with the first through-hole located in the liquid inlet cavity and the second through-hole located in the outer tube, allowing liquid to be sequentially introduced into the capsule.

[0010] Optionally, one side of the signal receiver is provided with an annular mounting groove, and the bottom of the mounting groove is provided with a connecting post for connecting to the wire. The mounting groove is adapted to the outer tube, and the connecting post is adapted to the wire cavity. Its advantages are: the mounting groove enables the installation of the receiver and the closure of the capsule at the front end; the connecting post can seal the front end of the wire cavity, thereby guiding the wire out while preventing liquid from soaking the wire.

[0011] Optionally, a plurality of first through holes and second through holes are provided, with a plurality of first through holes spaced apart in the liquid inlet chamber; and a plurality of second through holes spaced apart in the outer tube. The beneficial effect is that it ensures uniform and rapid liquid flow.

[0012] Optionally, a tail connector is also included; the tail connector has a connecting end, which is connected to the second end via the retaining ring. Its advantage is that providing a tail connector facilitates surgical procedures.

[0013] Optionally, the tail connector further comprises an independent first channel and a second channel; the first channel is connected to the connecting end and communicates with the wire cavity, and is used to guide the wire out; the second channel is connected to the connecting end and communicates with the liquid inlet cavity. Its advantages are: liquid is introduced through the second channel, and the wire is guided out of the tail connector through the first channel.

[0014] Optionally, the tail connector is further provided with a third channel, which is independently provided from the first and second channels; the third channel is connected to the connecting end and communicates with the gap formed between the inner wall of the outer tube and the outer wall of the core tube. Its advantage is that the third channel is used to discharge liquid and gas from the capsule.

[0015] Optionally, a sealing element is also included, which is embedded in the connecting end. The sealing element has a first transition cavity, a second transition cavity, and a third transition cavity corresponding to the first channel, the second channel, and the third channel, respectively. Its beneficial effect is that the sealing element separates the first channel, the second channel, and the third channel while ensuring the airtight connection between the first channel and the wire cavity, the second channel and the liquid inlet cavity, and the third channel and the outer tube and the core tube.

[0016] Optionally, the conductor is provided with an insulating layer. This has the advantage of further ensuring the insulation of the conductor. Attached Figure Description

[0017] Figure 1 A schematic diagram of the structure of a device for monitoring neurophysiological signals provided in an embodiment of the present invention;

[0018] Figure 2 for Figure 1 Detailed diagram of point A in the middle;

[0019] Figure 3 A schematic diagram of a device for monitoring neurophysiological signals according to another embodiment of the present invention;

[0020] Figure 4 for Figure 3 Sectional view at point B;

[0021] Figure 5 for Figure 3 Schematic diagram of the structure at point B;

[0022] Figure 6 This is a schematic diagram of the sealing component provided in an embodiment of the present invention.

[0023] Figure label:

[0024] The following components are included: catheter 100, first end 101, second end 102, through hole 110, first through hole 111, second through hole 112, core tube 120, liquid inlet chamber 121, wire chamber 122, outer tube 130; capsule 200; receiver 300, signal receiving end 301, wire 302, mounting groove 303, connecting post 304; buckle 400; tail connector 500, connecting end 501, first channel 502, second channel 503, third channel 504; sealing element 600, first transition chamber 601, second transition chamber 602, third transition chamber 603. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by those skilled in the art. The terms "comprising" and similar expressions used herein mean that the element or object preceding the word covers the element or object listed following the word and its equivalents, but do not exclude other elements or objects.

[0026] To address the problems existing in the prior art, embodiments of the present invention provide a device for monitoring neurophysiological signals, referencing... Figure 1 and Figure 2 As shown, the device includes a catheter 100, a capsule 200, a receiver 300, and a retainer 400. The catheter 100 has a first end 101 and a second end 102, and a through hole 110 located between the first end 101 and the second end 102. The capsule 200 is fitted onto the catheter 100. The receiver 300 has a signal receiving end 301 and a lead wire 302. The signal receiving end 301 is located at the first end 101 and closes the front end of the capsule 200 to the first end 101. The lead wire 302 transmits the neurophysiological signals received by the signal receiving end 301 through the catheter 100. The retainer 400 is fitted onto the second end 102 and closes the rear end of the capsule 200 to the second end 102.

[0027] It should be noted that the signal receiving end 301 can directly monitor neurophysiological signals and export the signals through the wire 302. In this embodiment, the front end of the capsule 200 is closed to the first end 101 of the catheter 100, the buckle 400 is fitted onto the second end 102, and the rear end of the capsule 200 is closed to the second end 102 of the catheter 100, so that the capsule 200 can form a sac shape by allowing liquid to enter through the through hole 110 of the catheter 100. The wire 302 exports the neurophysiological signals received by the signal receiving end 301 through the catheter 100. By placing the signal receiving end 301 at the first end 101 of the catheter 100, neurophysiological signals can be directly monitored, resulting in high monitoring accuracy and convenient operation.

[0028] Optionally, in yet another embodiment disclosed in this invention, reference is made to... Figures 3 to 6As shown, the conduit 100 includes a core tube 120 and an outer tube 130. The core tube 120 is disposed within the outer tube 130, and the core tube 120 has an independent wire guide cavity 122 and a liquid inlet cavity 121. The wire guide cavity 122 is used to guide the wire 302, and the liquid inlet cavity 121 is used for liquid inlet and venting. The through hole 110 includes a first through hole 111 and a second through hole 112. The first through hole 111 is disposed in the liquid inlet cavity 121, and the second through hole 112 is disposed in the outer tube 130.

[0029] It should be noted that the core tube 120 is a pipe disposed within the outer tube 130. The core tube 120 contains an independent wire cavity 122 and a liquid inlet cavity 121. The wire cavity 122 is used to guide the wire 302 out, preventing liquid from soaking the wire 302 and causing leakage, which would lead to inaccurate monitoring. The liquid inlet cavity 121 is used for liquid inlet and venting. A first through hole 111 is provided in the liquid inlet cavity 121, and a second through hole 112 is provided in the outer tube 130, allowing liquid to be sequentially introduced into the capsule 200 from the liquid inlet cavity 121 and the outer tube 130.

[0030] Optionally, one side of the signal receiving end 301 is provided with an annular mounting groove 303, and the bottom of the mounting groove 303 is provided with a connecting post 304 connected to the wire 302. The mounting groove 303 is adapted to the outer tube 130, and the connecting post 304 is adapted to the wire cavity 122.

[0031] In this embodiment, the front end of the capsule 200 is embedded between the mounting groove 303 and the outer tube 130 to install the receiver 300 and to close the capsule 200 at its front end. Additionally, the connecting post 304 can close the front end of the wire cavity 122, thereby allowing the wire 302 to be routed while preventing liquid from soaking the wire 302.

[0032] Optionally, a plurality of the first through holes 111 and the second through holes 112 are provided, with a plurality of the first through holes 111 spaced apart in the liquid inlet chamber 121 and a plurality of the second through holes 112 spaced apart in the outer tube 130.

[0033] In this embodiment, by providing a plurality of first through holes 111 and second through holes 112, uniform and rapid liquid flow is ensured.

[0034] Optionally, the device further includes a tail connector 500. The tail connector 500 has a connecting end 501, which is connected to the second end 102 via the retaining ring 400.

[0035] Specifically, the tail connector 500 is further provided with three independent channels: a first channel 502, a second channel 503, and a third channel 504. The first channel 502 connects to the connecting end 501 and is connected to the wire cavity 122, serving to guide the wire 302. The second channel 503 connects to the connecting end 501 and is connected to the liquid inlet cavity 121, providing liquid. The third channel 504 connects to the connecting end 501 and is connected to the gap formed between the inner wall of the outer tube 130 and the outer wall of the core tube 120. This gap serves as a drainage and venting channel, allowing liquid and gas to be discharged from the capsule 200.

[0036] Optionally, the device further includes a sealing element 600, which is embedded in the connecting end 501. The sealing element 600 has a first transition cavity 601, a second transition cavity 602, and a third transition cavity 603 respectively corresponding to the first channel 502, the second channel 503, and the third channel 504.

[0037] In this embodiment, by setting the sealing component 600, the first channel 502, the second channel 503, and the third channel 504 are separated, while ensuring the sealing of the first channel 502 with the wire cavity 122, ensuring the sealing of the second channel 503 with the liquid inlet cavity 121, and ensuring the sealing of the third channel 504 with the liquid outlet and exhaust channel.

[0038] Furthermore, the insulation of the conductor 302 is further ensured. In this embodiment, an insulating layer is provided on the outside of the conductor 302.

[0039] The above description is merely a specific implementation of the embodiments of this application, but the protection scope of the embodiments of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the embodiments of this application should be covered within the protection scope of the embodiments of this application. Therefore, the protection scope of the embodiments of this application should be determined by the protection scope of the claims.

Claims

1. A device for monitoring neurophysiological signals, characterized in that, include: A catheter has a first end and a second end, and a through hole located between the first end and the second end; the catheter includes a core tube and an outer tube; the core tube is disposed inside the outer tube, and the core tube has an independent wire cavity and a liquid inlet cavity, the wire cavity being used to guide the wire, and the liquid inlet cavity being used for liquid inlet and venting; the through hole includes a first through hole and a second through hole, the first through hole being disposed in the liquid inlet cavity, and the second through hole being disposed in the outer tube; A capsule is fitted over the catheter; The receiver has a signal receiving end and a wire. The signal receiving end is located at the first end and closes the front end of the capsule to the first end. The wire is located inside the catheter to export the neurophysiological signals received by the signal receiving end. An annular mounting groove is provided on one side of the signal receiving end. A connecting post for connecting the wire is provided at the bottom of the mounting groove. The mounting groove is adapted to the outer tube, and the connecting post is adapted to the wire cavity. A buckle is fitted onto the second end, and the rear end of the bladder is closed to the second end.

2. The device for monitoring neurophysiological signals according to claim 1, characterized in that, Both the first through hole and the second through hole are provided in a plurality of portions, with a plurality of the first through holes spaced apart in the liquid inlet chamber; and a plurality of the second through holes spaced apart in the outer tube.

3. The device for monitoring neurophysiological signals according to claim 1 or 2, characterized in that, It also includes the tail connector; The tail connector has a connecting end, which is connected to the second end via the buckle.

4. The device for monitoring neurophysiological signals according to claim 3, characterized in that, The tail connector is also provided with a first channel and a second channel that are independent of each other; The first channel is connected to the connection end and is connected to the wire cavity; the first channel is used to guide the wire. The second channel is connected to the connection end and is connected to the liquid inlet chamber.

5. The device for monitoring neurophysiological signals according to claim 4, characterized in that, The tail connector is also provided with a third channel, which is independently provided from the first channel and the second channel; The third channel connects to the connecting end and is in communication with the gap formed between the inner wall of the outer tube and the outer wall of the core tube.

6. The device for monitoring neurophysiological signals according to claim 5, characterized in that, It also includes sealing components; The sealing element is embedded in the connection end, and the sealing element has a first transition cavity, a second transition cavity, and a third transition cavity respectively corresponding to the first channel, the second channel, and the third channel.

7. The device for monitoring neurophysiological signals according to claim 1, characterized in that, The conductor is provided with an insulating layer.

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