Nerve monitoring trachea cannula
By using contact electrodes with large contact areas and optimizing conductive materials in endotracheal intubation, the problems of poor contact and high resistance leading to identification difficulties have been solved, thus improving the reliability of nerve monitoring, shortening the operation time, reducing the risk of nerve damage, and enhancing the performance of endotracheal intubation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-15
- Publication Date
- 2026-03-24
AI Technical Summary
Existing endotracheal intubation methods suffer from poor contact between the contact electrode and the laryngeal muscles or high contact resistance, leading to difficulties in identification during surgery, prolonged operation time, and an increased risk of nerve damage.
A neuromonitoring endotracheal tube was designed, employing contact electrodes with a larger contact area, combined with conductive metal or conductive wire, optimizing the electrode position and structure to ensure good contact with the laryngeal muscles, and increasing the contact area through multi-strand conductive metal wires or irregularly shaped electrodes to achieve effective transmission of electromyographic signals.
It improves the contact ability between the contact electrode and the muscles inside the throat, reduces the difficulty of the operation, shortens the operation time, and reduces the probability of nerve damage, while enhancing the bending and compression resistance of the endotracheal tube.
Smart Images
Figure CN224024015U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of medical apparatus and instruments, especially relates to a nerve monitoring tracheal cannula. BACKGROUND
[0002] In recent years, the incidence of thyroid diseases, especially thyroid cancer, has increased rapidly, and thyroid cancer has become the fastest rising solid malignant tumor in the world. Nerve injury is the most common and most serious complication after thyroid surgery. Surgeons can easily cause nerve damage or incomplete tumor removal by relying on experience and visually identifying the recurrent laryngeal nerve, which affects the patient's quality of life. The application of tracheal cannula with nerve monitoring function can quickly find the nerve and effectively reduce the probability of recurrent laryngeal nerve injury. When the recurrent laryngeal nerve is stimulated, it will cause the laryngeal muscle to contract, thereby contacting the contact electrode on the tracheal cannula. The contact electrode collects signals and transmits the myoelectric signal back to the intraoperative nerve monitor to complete the intraoperative nerve monitoring function.
[0003] Currently, some tracheal cannulas have the problem of poor contact between the contact electrode and the laryngeal muscle or large contact resistance after contact, which makes the device unable to identify. Poor contact causes the doctor to adjust the cannula position multiple times before surgery and is easily affected by the patient's position, thereby increasing the operation time and difficulty. Large resistance will cause the myoelectric signal to be unable to transmit, and in severe cases, it will cause the doctor to misjudge and damage the patient's nerve. UTILITY MODEL CONTENT
[0004] The technical problem solved is that the tracheal cannula in the prior art has the problems of poor contact between the contact electrode and the vocal cords and large contact resistance during surgery. The utility model provides a nerve monitoring tracheal cannula with excellent performance of the contact electrode, thereby improving the operation operability and safety performance.
[0005] Technical scheme: The utility model discloses a nerve monitoring tracheal cannula, wherein the tracheal cannula comprises:
[0006] The cannula tube provides a smooth airway for the patient and exchanges gas, and the front end side wall of the cannula tube is provided with a bare area in the circumferential direction;
[0007] The circuit system comprises conductive material arranged along the inner wall of the cannula tube and a connecting cable connected with the conductive material outside the cannula tube, and the distal end plug of the connecting cable is connected with the nerve monitor. The conductive material forms a contact electrode in contact with the vocal cords at the outer surface of the cannula tube in the bare area, and the contact electrode has a larger contact area than the conductive material.
[0008] Preferably, the conductive material adopts conductive metal or conductive wire material.
[0009] Preferably, four cavities are arranged in the tube body of the intubation tube; the contact electrode comprises two groups, each group of contact electrode comprises two conductive materials arranged in the corresponding cavity respectively, the distance between the two conductive materials in the group is smaller than the distance between the two conductive materials in the two groups; the position of the contact electrode is arranged in accordance with the human vocal cord structure.
[0010] Preferably, the contact electrode in the exposed area is made of conductive wire.
[0011] Preferably, the contact electrode in the exposed area is made of a plurality of conductive metal wires, the plurality of conductive metal wires are correspondingly dispersed on the exposed area, and the two ends of the plurality of conductive metal wires are bundled in the ring structure and inserted into the corresponding cavity.
[0012] Preferably, the contact electrode is a special-shaped electrode, and the surface of the special-shaped electrode has a wave line structure.
[0013] Preferably, a positioning sleeve is sleeved on the front end of the tube body of the intubation tube, an inflation tube is arranged in the tube body of the intubation tube and communicates with the positioning sleeve, the distal end of the inflation tube is arranged to pass through the rear end of the tube body of the intubation tube and communicate with an indicating balloon, a one-way valve is connected to the indicating balloon, the one-way valve is a standard luer connector and is connected with an external air pump.
[0014] Preferably, a flexible end head is arranged at the front end of the tube body of the intubation tube.
[0015] Preferably, a gas supply connector connected with a breathing machine is arranged at the tail end of the tube body of the intubation tube, and an air outlet hole communicating with the gas supply connector is arranged on the flexible end head.
[0016] Preferably, a stainless steel spring is arranged in the tube wall of the tube body of the intubation tube.
[0017] Compared with the prior art, the utility model has the following beneficial effects:
[0018] 1. The utility model has excellent performance of the contact electrode, the contact electrode has larger contact area, thereby improving the contact ability of the contact electrode and the muscle in the throat, solving the problem that the equipment cannot be recognized due to poor contact or large resistance after contact, reducing the operation difficulty, shortening the operation time, and reducing the probability of operation damage to the patient's nerve;
[0019] 2. The front end of the tracheal tube is provided with a soft flexible end head, which can reduce the damage of the head end to the trachea when the tracheal tube is inserted into the trachea;
[0020] 3. The inner wall of the tracheal tube is embedded with a stainless steel spring, which can improve the bending resistance and extrusion resistance of the tracheal tube, and ensure that sufficient gas replacement is provided for the patient.
[0021] 4、The intubation tube body is provided with four cavities, and each cavity is provided with a conductive material, four conductive materials form four contact electrodes in the exposed area, and the position of the contact electrode is attached to the human vocal cord structure, and has a larger contact area when the vocal cord is excited to contract, which can effectively transmit the electromyographic signal;
[0022] 5、The contact electrode has a larger contact area in the exposed area, which is beneficial to the assembly of the non-exposed area conductive material and the better contact of the contact electrode with the vocal cord, and when the stimulating current acts on the recurrent laryngeal nerve, the vocal cord will contract, the contact electrode will contact to generate the electromyographic signal, the electromyographic signal is transmitted back to the nerve monitor through the connecting cable to complete the intraoperative monitoring of the recurrent laryngeal nerve. BRIEF DESCRIPTION OF DRAWINGS
[0023] Figure 1 It is a front view of the tracheal intubation structure of the utility model;
[0024] Figure 2 It is Figure 1 It is a structure schematic view of the special-shaped electrode in one embodiment;
[0025] Figure 3 It is Figure 1 It is a structure schematic view of the special-shaped electrode in one embodiment;
[0026] Figure 4 It is Figure 1 It is a structure schematic view of the special-shaped electrode in one embodiment.
[0027] Fig. 1 is a front view of the tracheal intubation structure of the utility model; Fig. 2 is a sectional view of the tracheal intubation structure of the utility model; Fig. 3 is a structure schematic view of the special-shaped electrode in one embodiment; Fig. 4 is a structure schematic view of the special-shaped electrode in another embodiment; Fig. 5 is a structure schematic view of the special-shaped electrode in another embodiment; Fig. 6 is a structure schematic view of the special-shaped electrode in another embodiment. DETAILED DESCRIPTION
[0028] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the following will be combined with the accompanying drawings to make a clear and complete description of the technical scheme of the embodiments of the utility model. Figures 1-4 It is obvious that the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the described embodiments of the utility model, all other embodiments obtained by those skilled in the art belong to the scope of protection of the utility model.
[0029] Embodiment 1: as Figures 1-2The utility model discloses a nerve monitoring tracheal cannula, and the tracheal cannula 100 includes the cannula tube body 6 for providing the unobstructed airway of patient and carrying out gas exchange and circuit system. The pipe wall of cannula tube body 6 is built-in stainless steel spring, can promote the anti-bending and anti-extrusion performance of tracheal cannula, ensure for patient provides sufficient gas replacement. Cannula tube body 6 front end is provided with flexible end 12, and cannula tube body 6 tail end is provided with the gas supply connector 4 connected with breathing machine, and the flexible end 12 is provided with the air outlet hole 13 in communication with the gas supply connector 4, and the soft end 12 of tracheal cannula front end can reduce the damage to human trachea when inserting into the trachea, and exchanges air for patient.
[0030] The cannula tube body 6 is fixed with the positioning sleeve bag 8 at the front end of the exposed area 9, the cannula tube body 6 is provided with the inflation pipe 3 in communication with the positioning sleeve bag 8, the inflation pipe 3 is out of the rear end of the cannula tube body 6 and is in communication with the indicating ballon 2, the indicating ballon 2 is connected with the one-way valve 1, the one-way valve 1 is standard luer connector and is connected with the external air pump. When working, the external air pump can be inflated to the positioning sleeve bag 8 through the one-way valve 1, the indicating ballon 2 and the inflation pipe 3, so that the positioning sleeve bag 8 expands and fixes the tracheal cannula in the appropriate position of the trachea, to meet the demand of laryngeal nerve examination.
[0031] The cannula tube body 6 is fixed with the positioning sleeve bag 8 at the front end of the exposed area 9, the cannula tube body 6 is provided with the inflation pipe 3 in communication with the positioning sleeve bag 8, the inflation pipe 3 is out of the rear end of the cannula tube body 6 and is in communication with the indicating ballon 2, the indicating ballon 2 is connected with the one-way valve 1, the one-way valve 1 is standard luer connector and is connected with the external air pump. When working, the external air pump can be inflated to the positioning sleeve bag 8 through the one-way valve 1, the indicating ballon 2 and the inflation pipe 3, so that the positioning sleeve bag 8 expands and fixes the tracheal cannula in the appropriate position of the trachea, to meet the demand of laryngeal nerve examination.
[0032] The conductive material 7 adopts conductive metal or conductive wire material. The cannula tube body 6 is provided with four cavities; the contact electrode 10 includes two groups, and each group of contact electrodes 10 includes two conductive materials 7 respectively arranged in corresponding cavities, the distance between the two conductive materials 7 in a group is less than the distance between the two conductive materials 7 in two groups, that is, the distance between the two conductive materials 7 in each group is close, and the distance between the two conductive materials 7 in two groups is far, and the position of the contact electrode 10 is arranged in accordance with the structure of human vocal cords, so that better conductive contact effect is obtained.
[0033] In the embodiment, as shown in Figure 2As shown, the contact electrode 10 is made of conductive wire in the exposed area 9, and the two ends of the contact electrode 10 are inserted into the lumen of the intubation tube 6, and the cross-woven conductive wire cooperates with the conductive material 7 to effectively increase the contact area with the vocal cords, so that the electromyographic signal can be better collected. During the operation, the recurrent laryngeal nerve is stimulated by external electricity, and the vocal cords are contracted to contact the conductive material 7 or the cross-woven conductive wire, and the electromyographic signal is collected and transmitted back to the nerve monitor through the connecting cable, and the intraoperative nerve monitoring is completed.
[0034] Example 2: Based on the tracheal intubation tube body structure of example 1, as shown in the figure, Figure 3 In this embodiment, the contact electrode 10 is made of a plurality of conductive wires in the exposed area 9, and the plurality of conductive wires are dispersed in the exposed area 9, and the two ends of the plurality of conductive wires are bundled in the annular structure 11 and inserted into the corresponding lumen. The contact electrode 10 with multiple wires is dispersed in the exposed area 9, which can contact more vocal cord tissues, has more contact area than the existing structure, and can transmit the collected signal to the nerve monitor through the contact electrode 10 to obtain better monitoring effect.
[0035] Example 3: Based on the tracheal intubation tube body structure of example 1, as shown in the figure, Figure 4 In this embodiment, the contact electrode 10 is a special-shaped electrode, and the surface thereof has a wave line structure. The inner diameter of the special-shaped electrode is slightly larger than the outer diameter of the conductive material 7, and the surface thereof has a wave line feature, which can contact more vocal cord tissues. The two ends of the special-shaped electrode are inserted into the corresponding lumen of the intubation tube 6 to prevent damage to the inner wall of the trachea during the insertion and removal of the tracheal intubation tube. When assembling, the conductive material 7 passes through the special-shaped electrode to form a loop while fixing the special-shaped electrode at the exposed area 9.
[0036] The above is the preferred embodiment of the present application. It should be noted that for those skilled in the art, without departing from the principle of the present application, some improvements and decorations can be made, and these improvements and decorations should also be considered as the protection scope of the present application.
Claims
1. A neuro-moni tored tracheal tube, c h a r a c t e r i z e d in that, The tracheal cannula (100) comprises: a cannula tube (6) for providing a smooth airway for a patient and for gas exchange, the cannula tube (6) being provided with a bare area (9) on the circumference of the sidewall of the front end; circuit system comprising conductive material (7) arranged along the inner wall of the cannula tube (6) and a connecting cable (5) arranged outside the cannula tube (6) and connected with the conductive material (7), the distal end plug (14) of the connecting cable (5) being connected with a nerve monitor; the conductive material (7) forms a contact electrode (10) in contact with the vocal cords on the outer surface of the cannula tube (6) at the bare area (9), and the contact electrode (10) has a larger contact area than the conductive material (7).
2. The neuromonitoring endotracheal tube of claim 1, wherein, The conductive material (7) is made of conductive metal or conductive wire.
3. The neurostimulated tracheal tube of claim 2, wherein, The cannula tube (6) is provided with four lumens; the contact electrode (10) includes two groups, each group of contact electrodes (10) including two conductive materials (7) respectively arranged in corresponding lumens, the distance between the two conductive materials (7) in a group being less than the distance between the two conductive materials (7) in two groups; the position of the contact electrode (10) is arranged in accordance with the structure of the human vocal cords.
4. The neurostimulated tracheal tube of claim 3, wherein, The contact electrode (10) in the bare area (9) is made of conductive wire.
5. The nerve monitoring endotracheal tube of claim 3, wherein, The contact electrode (10) in the bare area (9) is made of a plurality of conductive metal wires, the plurality of conductive metal wires being dispersed on the bare area (9), and the two ends of the plurality of conductive metal wires being bundled in a ring structure (11) and inserted into corresponding lumens.
6. The nerve monitoring endotracheal tube of claim 3, wherein, The contact electrode (10) is a special-shaped electrode with a surface having a wave-like structure.
7. The nerve monitoring endotracheal tube of any of claims 1-6, wherein, The cannula tube (6) is provided with a positioning sleeve (8) at the front end of the bare area (9), the cannula tube (6) is provided with an inflation tube (3) connected with the positioning sleeve (8), the distal end of the inflation tube (3) is inserted into the cannula tube (6) from the rear end and is connected with an indicator balloon (2), the indicator balloon (2) is connected with a one-way valve (1), the one-way valve (1) is a standard luer connector and is connected with an external air pump.
8. The neurovantage endotracheal tube of claim 7, wherein, The cannula tube (6) is provided with a flexible tip (12) at the front end.
9. The neurostimulated tracheal tube of claim 8, wherein, The cannula tube (6) is provided with a gas supply connector (4) connected with a breathing machine at the tail end, the flexible tip (12) is provided with an air outlet hole (13) connected with the gas supply connector (4).
10. The neuromonitoring endotracheal tube of claim 7, wherein, The cannula tube (6) is provided with a stainless steel spring inside the tube wall.