Electrode-adjustable nerve monitoring dual-lumen cannula

Abstract

The application discloses an electrode-adjustable nerve monitoring double-lumen cannula, which at least comprises a left monitoring tube and a right monitoring tube arranged separately; the left monitoring tube and the right monitoring tube both comprise a double-lumen cannula, a tracheal connector, a bronchial cannula and a terminal cannula; the double-lumen cannula is connected with the tracheal connector, and the tracheal connector is connected with the bronchial cannula; the bronchial cannula is connected with the terminal cannula; a tracheal air bag is arranged on the end of the double-lumen cannula close to the tracheal connector; a bronchial air bag is arranged on the bronchial cannula close to the terminal cannula; a flexible metal sheet is sleeved on the double-lumen cannula, and a regulating mechanism for regulating the position of the flexible metal sheet is further arranged on the double-lumen cannula; the flexible metal sheet can move along the length direction of the double-lumen cannula under the action of the regulating mechanism; the flexible metal sheet is connected with an electrode wire; the metal sheet designed in the scheme is adjustable, that is, the up-and-down displacement of the metal sheet on the tracheal cannula main pipe can be realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of medical devices, in particular to a nerve monitoring double-lumen cannula with adjustable electrode. BACKGROUND

[0002] In esophageal cancer surgery, it is generally believed that nerve monitoring can reduce recurrent laryngeal nerve injury and improve the number of lymph node dissection, and there are few studies on its long-term survival after surgery. Intraoperative neurophysiological monitoring refers to the application of electrophysiological principles, through electrical stimulation of motor nerves, nerve impulses are transmitted to the muscles they control, and the muscles they control produce electromyographic signals, forming electromyograms to assist in judging the functional status of nerves during surgery.

[0003] The existing method uses double-lumen tracheal cannula for monitoring, and the following two defects exist: 1. The monitoring cannula uses metal sheets or conductive wires, which does not take into account the structural differences of different individuals. According to the Chinese standard for esophageal cancer chest lymph node grouping proposed by the consensus, there are 9 groups (C201-C209 groups) that should be the target of chest lymph node dissection in esophageal cancer radical surgery, which cannot meet the number requirement. The lung cancer dissection position is lower, the conductive wire contact area is small, and the metal sheet only has one ring around the tracheal cannula, which may cause the monitoring point to be out of contact, resulting in monitoring failure. The position of the lymph node dissection site and its accompanying nerve after insertion into the trachea does not match the electrode position of the tracheal cannula, resulting in inaccurate monitoring information or inability to monitor.

[0004] In the prior art "202220861110.7 A novel double-lumen nerve monitoring tracheal cannula", "201610779318.3 Double-balloon nerve monitoring catheter device", "202110275582.4 Nerve monitoring tracheal cannula", "201710234576.8 Sac-shaped electrode nerve monitoring double-lumen tracheal cannula device", silver paste conductive coating is used as the collection and contact electrode, and metal conductive wire is used as the electrode. However, these structures have the following defects: the silver paste coating cannot cover the entire length of the cannula horizontally, and the conductive wire is very thin, which has a small contact surface when contacting the trachea, making it difficult to contact the trachea for monitoring during insertion and easily causing the tail to lift and poke the trachea, resulting in a low safety.

[0005] For example, the electrode structure disclosed in the prior art "201910750079.2 Double-lumen bronchial cannula", "201910750079.2 Double-lumen bronchial cannula", "201911214318.9 Double-lumen bronchial cannula", "201811608638.8 Double-lumen bronchial cannula", "201710558987.2 Double-lumen bronchial cannula for precise drug administration", and "201420450890.1 Electrode-controllable tracheal cannula", "201720373646.3 Capsule-shaped electrode nerve monitoring double-lumen tracheal cannula device" can only expand in the transverse direction to contact the trachea, and cannot adjust the detection position by a large distance. SUMMARY

[0006] The purpose of the present application is to provide an electrode-adjustable nerve monitoring double-lumen cannula to solve the problems of the prior art, such as using silver paste conductive coating as the collection and contact electrode, and metal conductive wire as the electrode. However, the respective defects of these structures are that the silver paste coating cannot cover the entire cannula transversely, and the conductive wire is very thin, which has a small contact area when contacting the trachea, making it difficult to contact the trachea for monitoring during insertion and easily causing tail to lift and pierce the trachea to cause an insertion injury with low safety. At the same time, the electrode structure can only expand in the transverse direction to contact the trachea, and cannot adjust the detection position by a large distance.

[0007] The present application is realized by the following scheme:

[0008] An electrode-adjustable nerve monitoring double-lumen cannula, at least comprising a left monitoring tube and a right monitoring tube arranged separately; the left monitoring tube and the right monitoring tube each comprise a double-lumen cannula, a tracheal connector, a bronchial cannula, and a terminal cannula; the double-lumen cannula is connected to the tracheal connector, the tracheal connector is connected to the bronchial cannula, and the bronchial cannula is connected to the terminal cannula; a tracheal air sac is arranged on the end of the double-lumen cannula close to the tracheal connector; a bronchial air sac is arranged on the bronchial cannula close to the terminal cannula; a flexible metal sheet is sleeved on the double-lumen cannula, and a position adjusting mechanism for adjusting the position of the flexible metal sheet is further arranged on the double-lumen cannula; the flexible metal sheet can move along the length direction of the double-lumen cannula under the action of the adjusting mechanism; and the flexible metal sheet is connected to an electrode wire.

[0009] Based on the structure of the above-mentioned electrode-adjustable nerve monitoring double-lumen cannula, the bronchial cannula is provided with a first notch, the distal cannula is provided with a second notch opposite to the direction of the first notch, the length of the double-lumen cannula of the left monitoring tube is longer than that of the double-lumen cannula of the right monitoring tube, and the bending angle of the first notch of the left monitoring tube is larger than that of the first notch of the right monitoring tube; the length of the double-lumen cannula of the right monitoring tube is shorter than that of the double-lumen cannula of the left monitoring tube, and the bending angle of the first notch of the right monitoring tube is smaller than that of the first notch of the right monitoring tube.

[0010] Based on the structure of the above-mentioned electrode-adjustable nerve monitoring double-lumen cannula, the flexible metal sheet comprises a first metal sheet, a second metal sheet and a spiral barrier strip; the first metal sheet and the second metal sheet are connected by the spiral barrier strip, the first metal sheet and the second metal sheet are arranged in a circular arc structure around the outer sidewall of the double-lumen cannula, and the first metal sheet and the second metal sheet are respectively connected with different electrode wires.

[0011] Based on the structure of the above-mentioned electrode-adjustable nerve monitoring double-lumen cannula, the adjusting mechanism comprises an upper end curling part, a lower end curling part, a pulley part and a position adjusting belt, the upper end curling part is arranged at a position close to the front segment of the double-lumen cannula, the lower end curling part is arranged at a position below the tracheal airbag, the pulley part is arranged close to the upper end curling part, the position adjusting belt is connected with the upper end curling part and the upper end part of the spiral barrier strip, and the lower end curling part is connected with the lower end part of the spiral barrier strip.

[0012] Based on the structure of the above-mentioned electrode-adjustable nerve monitoring double-lumen cannula, a first protrusion is arranged on the position adjusting belt close to the pulley part, a second protrusion matched with the first protrusion is arranged on the pulley part, the first protrusion and the second protrusion are engaged, and a screw cap is further arranged on the pulley part; a spiral spring is arranged in each of the upper end curling part and the lower end curling part, and the spiral barrier strip is connected with the spiral springs of the upper end curling part and the lower end curling part.

[0013] Based on the structure of the above-mentioned electrode-adjustable nerve monitoring double-lumen cannula, a covering layer is arranged on at least part of the length of the double-lumen cannula, a strip-shaped opening is arranged on the covering layer, the flexible metal sheet is sleeved on the outside of the covering layer, and the position of the spiral barrier strip matches the position of the strip-shaped opening; the upper end curling part and the pulley part are arranged outside the covering layer.

[0014] Based on the structure of the electrode-adjustable nerve monitoring double-lumen cannula, the upper end curling part comprises a first housing cavity, a first fixed shaft and a first spiral spring; the first fixed shaft is arranged at the center position of the first housing cavity, the center position of the first spiral spring is connected with the first fixed shaft, the first spiral spring is arranged in the first housing cavity, and a first opening for the movement of the first spiral spring and the position adjusting belt is arranged on the side wall of the first housing cavity.

[0015] Based on the structure of the electrode-adjustable nerve monitoring double-lumen cannula, the lower end curling part comprises a second housing cavity, a second fixed shaft and a second spiral spring; the second fixed shaft is arranged at the center position of the second housing cavity, the center position of the second spiral spring is connected with the second fixed shaft, the second spiral spring is arranged in the second housing cavity, and a second opening for the movement of the second spiral spring and the position adjusting belt is arranged on the side wall of the second housing cavity.

[0016] Based on the structure of the electrode-adjustable nerve monitoring double-lumen cannula, the pulley part comprises a connecting pulley and a third fixed shaft, the third fixed shaft is arranged at the center position of the connecting pulley, the connecting pulley can rotate relative to the third fixed shaft, a first clamping groove is arranged on the opposite surface of the rotating cap of the pulley part, the first clamping groove is arranged at least two along the circumferential position of the connecting pulley, a rotating cavity matched with the third fixed shaft is arranged at the center position of the rotating cap, a clamping rod is arranged on the end surface of the rotating cap close to the connecting gear, the position and number of the clamping rod are the same as those of the first clamping groove, and the clamping rod is clamped into the first clamping groove.

[0017] Based on the structure of the electrode-adjustable nerve monitoring double-lumen cannula, a limiting assembly for limiting the connecting pulley is further arranged on the side wall of the double-lumen cannula; the limiting assembly comprises a guide cavity, a damping member and a supporting spring, the guide cavity is arranged on the side wall of the double-lumen cannula, the supporting spring is arranged at the bottom position of the damping member and the guide cavity, and a handrail is arranged on the side wall away from the double-lumen cannula.

[0018] In summary, by adopting the technical scheme, the present application has the following beneficial effects: the neural monitoring tracheal cannula in the prior art has the following defects: the exposed metal wire is easy to contact tissues other than the vocal cords, thus generating a conductive bypass, and it is extremely easy to generate false alarms and mislead the operator; the neural monitoring tracheal cannula in the prior art is difficult to control the depth of insertion into the trachea in use, and there is a certain error; when the neural monitoring tracheal cannula is inserted too deep or too shallow, the metal wire contacts the vocal cords and other tissues at the same time, thus leading to inaccurate monitoring and often leading to monitoring failure.

[0019] 1、The metal sheet designed in the scheme is adjustable, two reverse contraction springs and a wheel sliding structure are arranged, and a wire is arranged to pass through the pulley and extend outward. That is, the metal sheet can be displaced up and down on the tracheal cannula main pipe to monitor different lymph node parts during cleaning. The position of the metal sheet is adjusted to contact the vocal cord muscle, so as to avoid contacting other tissues.

[0020] 2、The present application uses a flexible metal sheet as a monitoring electrode, the metal sheet completely wraps the trachea, and a spiral-shaped separation belt is arranged in the middle to form a positive and negative electrode. The metal sheet has a larger contact area, and the signal is more stable when contacting and collecting the trachea. The spiral-shaped separation belt can avoid the situation that only the vocal cord muscle position corresponding to the trachea is contacted when bending in the body. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0022] Figure 2 It is a schematic diagram of the overall endotracheal tube structure of the present application;

[0023] Figure 3 It is a schematic diagram of the adjustment mechanism of the present application after expansion;

[0024] Figure 4 It is a schematic diagram of the cross-sectional structure of the adjustment mechanism of the present application;

[0025] Figure 5 It is a position diagram of the spiral separation belt in the flexible metal sheet of the present application;

[0026] Figure 6 It is Figure 5 a rear perspective view;

[0027] Figure 7 It is a schematic diagram of the limiting component of the present application;

[0028] BRIEF DESCRIPTION OF DRAWINGS: 1, left monitoring tube; 2, right monitoring tube; 3, double-lumen cannula; 4, tracheal connector; 5, bronchial cannula; 6, end cannula; 7, tracheal balloon; 8, bronchial balloon; 9, flexible metal sheet; 10, adjusting mechanism; 11, electrode wire; 12, tracheal balloon inflation tube; 13, bronchial balloon inflation tube; 14, first notch; 15, second notch; 91, first metal sheet; 92, second metal sheet; 93, spiral barrier belt; 101, upper end curling part; 102, lower end curling part; 103, pulley part; 104, adjusting belt; 105, first protruding tooth; 106, second protruding tooth; 107, screw cap; 108, covering layer; 109, strip-shaped opening; 110, first housing cavity; 111, first fixed shaft; 112, first volute spring; 113, first opening; 114, second housing cavity; 115, second fixed shaft; 116, second volute spring; 117, second opening; 118, connecting pulley; 119, third fixed shaft; 120, first clamping groove; 121, rotating cavity; 122, clamping rod; 123, guide cavity; 124, damping piece; 125, supporting spring; 126, handrail. DETAILED DESCRIPTION

[0029] All of the features disclosed in this specification, and / or all of the steps of any method or process specified in this specification, can be combined in any combination, unless specific combinations are excluded herein.

[0030] Any of the features disclosed in this specification, unless explicitly stated otherwise, can be replaced by alternative features serving the same, equivalent or similar purpose.

[0031] In the description of the application, it is to be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0032] In addition, the terms "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features.

[0033] Example 1

[0034] As Figures 1-7 shown, the present application provides a technical solution:

[0035] The electrode-adjustable nerve monitoring double-lumen cannula comprises a left monitoring tube 1 and a right monitoring tube 2 arranged separately; the left monitoring tube 1 and the right monitoring tube 2 each comprise a double-lumen cannula 3, a tracheal connector 4, a bronchial cannula 5 and a terminal cannula 6; the double-lumen cannula 3 is connected with the tracheal connector 4, and the tracheal connector 4 is connected with the bronchial cannula 5; the bronchial cannula 5 is connected with the terminal cannula 6; a tracheal airbag 7 is arranged on the end of the double-lumen cannula 3 close to the tracheal connector 4; a bronchial airbag 8 is arranged on the bronchial cannula 5 close to the terminal cannula 6; a flexible metal sheet 9 is sleeved on the double-lumen cannula 3, and an adjusting mechanism 10 for adjusting the position of the flexible metal sheet 9 is arranged on the double-lumen cannula 3; the flexible metal sheet 9 can move along the length direction of the double-lumen cannula 3 under the action of the adjusting mechanism 10; the flexible metal sheet 9 is connected with an electrode wire 11. A tracheal airbag inflation pipe 12 and a bronchial airbag inflation pipe 13 are arranged on the bronchus.

[0036] Based on the above structure, in use, the left monitoring tube 1 or the right monitoring tube 2 is selected according to the required monitoring position, then the terminal cannula 6 and part of the end of the double-lumen cannula 3 are inserted into the predetermined position, the tracheal airbag 7 is inflated to fix the position of the double-lumen cannula 3, the bronchial airbag 8 is inflated to fix the position of the bronchial cannula 5, and when monitoring, if the monitoring position is found to be incorrect, the position of the flexible metal sheet 9 can be adjusted by the adjusting mechanism 10, and the predetermined position is monitored by the flexible metal sheet 9.

[0037] For example, the bronchial cannula 5 is provided with a first notch 14, the terminal cannula 6 is provided with a second notch 15 opposite to the first notch 14, the length of the double-lumen cannula 3 of the left monitoring tube 1 is longer than that of the double-lumen cannula 3 of the right monitoring tube 2, and the bending angle of the first notch 14 of the left monitoring tube 1 is larger than that of the first notch 14 of the right monitoring tube 2; similarly, the length of the double-lumen cannula 3 of the right monitoring tube 2 is shorter than that of the double-lumen cannula 3 of the left monitoring tube 1, and the bending angle of the first notch 14 of the right monitoring tube 2 is smaller than that of the first notch 14 of the left monitoring tube 1.

[0038] Based on the above structure, the first notch 14 and the second notch 15 are arranged to perform simultaneous operation on the lungs during the operation, and due to the slight changes in the length and structure of the lungs on different sides caused by physiological structure, the double-lumen cannula 3 and the first notch 14 of the left and right monitoring tubes 2 are arranged to be different, and the difference can quickly select the pipeline, avoiding the wrong pipeline in use.

[0039] As an example, the flexible metal sheet 9 can include a first metal sheet 91, a second metal sheet 92 and a spiral barrier tape 93. The first metal sheet 91 and the second metal sheet 92 are connected by the spiral barrier tape 93, and the first metal sheet 91 and the second metal sheet 92 are arranged in an arc structure around the outer side wall of the double-lumen cannula 3, and the first metal sheet 91 and the second metal sheet 92 are respectively connected with different electrode wires 11;

[0040] The spiral barrier tape 93 is made of insulating material, and the spiral barrier tape 93 is arranged obliquely between the first metal sheet 91 and the second metal sheet 92;

[0041] Based on the above structure, the spiral barrier tape 93 connects the first metal sheet 91 and the second metal sheet 92 into a relatively stable structure, so that the arc-shaped sleeve formed by the first metal sheet 91 and the second metal sheet 92 can move around the length direction of the double-lumen cannula 3, and at the same time, the first metal sheet 91 and the second metal sheet 92 are forced to be isolated by the spiral barrier tape 93, avoiding the occurrence of short circuit. By connecting the electrode wire 11 with the first metal sheet 91 and the second metal sheet 92, a positive and negative electrode is formed to realize the monitoring function. In this scheme, compared with the prior art, the metal sheet has a larger contact area, and the signal is more stable when contacting and collecting the trachea. At the same time, the obliquely arranged spiral barrier tape can avoid the situation that only the barrier tape contacts the trachea when the first metal sheet 91 and the second metal sheet 92 are bent in the body.

[0042] As an example, the adjusting mechanism 10 can include an upper end curling part 101, a lower end curling part 102, a pulley part 103 and a position adjusting belt 104. The upper end curling part 101 is arranged near the front section of the double-lumen cannula 3, the lower end curling part 102 is arranged at the lower side of the tracheal balloon 7, the pulley part 103 is arranged near the upper end curling part 101, the position adjusting belt 104 is connected with the upper end of the spiral barrier tape 93 and the lower end of the spiral barrier tape 93 respectively, and the lower end curling part 102 is connected with the lower end of the spiral barrier tape 93.

[0043] A first protrusion 105 is arranged on the position adjusting belt 104 near the pulley part 103, a second protrusion 106 is arranged on the pulley part 103 and matched with the first protrusion 105, the first protrusion 105 and the second protrusion 106 are engaged, and a screw cap 107 can also be arranged on the pulley part 103; a spiral spring is arranged in the upper end curling part 101 and the lower end curling part 102, and the spiral barrier tape 93 is connected with the spiral springs of the upper end curling part 101 and the lower end curling part 102 respectively.

[0044] Based on the above structure, the spiral barrier band 93 of the flexible metal sheet 9 is connected by the volute spring at both ends, within a certain range, the adjusting band is always kept in tension state under the action of the turbine spring, but when the flexible metal sheet 9 needs to be adjusted downward, the rotating cap 107 is rotated clockwise, at this time, the adjusting band 104 at the upper end of the flexible metal sheet 9 moves downward, and the adjusting band 104 at the lower end of the flexible metal sheet 9 is tightened under the action of the volute spring, and the flexible metal sheet 9 is pulled downward to move downward; when the flexible metal sheet 9 needs to be adjusted upward, the rotating cap 107 is rotated counterclockwise, the adjusting band 104 at both ends is pulled upward, thereby driving the flexible metal sheet 9 to move upward.

[0045] As an example, the covering layer 108 is arranged on at least part of the length of the double-lumen cannula 3, the strip-shaped opening 109 is arranged on the covering layer 108, and the flexible metal sheet 9 is sleeved on the outside of the covering layer 108, and the position of the spiral barrier band 93 matches the position of the strip-shaped opening 109.

[0046] Based on the above structure, by arranging the covering layer 108, on the one hand, the electrode wire 11 of the adjusting band 104 can be covered, avoiding the second gear structure on the adjusting band 104 from contacting the trachea and causing damage to the trachea, and on the other hand, the movement position of the spiral barrier band 93 is limited, so that it is adjusted in a predetermined direction, thereby increasing the adjustment accuracy to a certain extent.

[0047] As an example, the upper end curling part 101 and the pulley part 103 are arranged outside the covering layer 108. In this way, the rotating cap 107 on the pulley part 103 can be rotated to rotate the pulley part 103.

[0048] As an example, the upper end curling part 101 can include a first housing cavity 110, a first fixed shaft 111, and a first volute spring 112. The first fixed shaft 111 is arranged at the center position of the first housing cavity 110, the center position of the first volute spring 112 is connected with the first fixed shaft, the first volute spring 112 is arranged in the first housing cavity 110, and a first opening 113 for the movement of the first volute spring 112 and the adjusting band 104 is arranged on the side wall of the first housing cavity 110.

[0049] The lower end curling part 102 can include a second housing cavity 114, a second fixed shaft 115, and a second volute spring 116. The second fixed shaft 115 is arranged at the center position of the second housing cavity 114, the center position of the second volute spring 116 is connected with the second fixed shaft, the second volute spring 116 is arranged in the second housing cavity 114, and a second opening 117 for the movement of the second volute spring 116 and the adjusting band 104 is arranged on the side wall of the second housing cavity 114.

[0050] Based on the above structure, by setting the first housing cavity 110 and the second housing cavity 114, the first spiral spring 112 and the second spiral spring 116 can be avoided to affect the outside world. The first opening 113 and the second opening 117 are arranged in the first housing cavity 110 and the second housing cavity 114 to facilitate the retraction and stretching of the spiral spring.

[0051] As an example, the pulley part 103 includes a connecting pulley 118 and a third fixed shaft 119 arranged at the center of the connecting pulley 118. The connecting pulley 118 can rotate relative to the third fixed shaft 119. The first clamping groove 120 can be arranged on the opposite surface of the cap 107. The first clamping groove 120 is arranged at least two along the circumferential position of the connecting pulley 118. The rotating cavity 121 matched with the third fixed shaft 119 is arranged at the center of the cap 107. The clamping rod 122 is arranged on the end surface of the cap 107 close to the connecting gear. The position and number of the clamping rod 122 are the same as those of the first clamping groove 120. The clamping rod 122 is clamped into the first clamping groove 120.

[0052] Based on the above structure, the rotation of the cap 107 can drive the connecting pulley 118 to move, thereby achieving the adjustment function of the flexible metal sheet 9.

[0053] As an example, the side wall of the double-cavity cannula 3 can also be provided with a limiting assembly for limiting the connecting pulley 118. The position of the connecting pulley 118 can be locked by the limiting assembly to prevent the flexible metal sheet 9 from deviating during the operation.

[0054] As an example, the limiting assembly can include a guide cavity 123, a damping member 124, and a supporting spring 125. The guide cavity 123 is arranged on the side wall of the double-cavity cannula 3. The supporting spring 125 is arranged at the bottom of the damping member 124 and the bottom of the guide cavity 123. The damping member 124 can be provided with a handrail 126 away from the side wall of the double-cavity cannula 3.

[0055] Based on the above structure, the damping member 124 is always in contact with the connecting pulley 118 under the action of the supporting spring 125, thereby locking the connecting pulley 118. When the connecting pulley 118 needs to be rotated, the damping member 124 is pulled down by the handrail 126, so that the connecting pulley 118 is unlocked. Then the connecting pulley 118 is rotated by the cap 107 to achieve adjustment.

[0056] As an example, the contact part of the damping member 124 connected with the connecting pulley 118 is arranged in an arc shape. The arc-shaped end part can increase the contact points between the damping member 124 and the connecting pulley 118, thereby increasing the damping effect. Meanwhile, the end part of the damping member 124 can be inserted into the gap between the adjacent second protruding teeth 106 to limit the movement of the second protruding teeth 106.

[0057] The range of the flexible metal sheet 9 driven by the rotary cover 107 is 0-6 cm; the position adjusting belt 104 is made of PVC.

[0058] The metal sheet is adjustable, two reverse contraction springs and a wheel sliding structure are arranged, a wire passes through the pulley and is outwardly supported; that is, the up and down displacement of the tracheal tube main pipe can be realized, so that the metal sheet can monitor the cleaning of different lymph node parts.

[0059] The flexible metal sheet 9 is used as a monitoring electrode, the metal sheet completely wraps the trachea, and a spiral-shaped partition belt is arranged in the middle to form a positive and negative electrode. The metal sheet has a larger contact area, the signal is more stable when contacting and collecting the trachea, and the spiral-shaped partition belt can avoid the situation that only the partition belt contacts the trachea when bending in the body.

[0060] The above only describes the preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An electrode-adjustable nerve monitoring dual-lumen cannula, comprising: At least including left and right monitoring tubes which are separately arranged; the left and right monitoring tubes each include a double-lumen tube, a tracheal connector, a bronchial tube and a terminal tube; the double-lumen tube is connected with the tracheal connector, the tracheal connector is connected with the bronchial tube, the bronchial tube is connected with the terminal tube, a tracheal cuff is arranged on the end of the double-lumen tube close to the tracheal connector, a bronchial cuff is arranged on the bronchial tube close to the terminal tube, a flexible metal sheet is sleeved on the double-lumen tube, a position adjusting mechanism is arranged on the double-lumen tube, the flexible metal sheet can move along the length direction of the double-lumen tube under the action of the adjusting mechanism, and the flexible metal sheet is connected with an electrode wire. The flexible metal sheet includes a first metal sheet, a second metal sheet and a spiral barrier strip, the first metal sheet and the second metal sheet are connected through the spiral barrier strip, the first metal sheet and the second metal sheet are arranged in a circular arc structure around the outer sidewall of the double-lumen tube, and the first metal sheet and the second metal sheet are respectively connected with different electrode wires. The adjusting mechanism includes an upper end curling part, a lower end curling part, a pulley part and a position adjusting belt, the upper end curling part is arranged at a position close to the front end of the double-lumen tube, the lower end curling part is arranged at a position below the tracheal cuff, the pulley part is arranged close to the upper end curling part, the position adjusting belt is connected with the upper end curling part and the upper end of the spiral barrier strip, and the lower end of the spiral barrier strip is connected with the lower end curling part. The bronchial tube is provided with a first notch, the terminal tube is provided with a second notch opposite to the first notch in direction, the length of the double-lumen tube of the left monitoring tube is longer than that of the double-lumen tube of the right monitoring tube, the bending angle of the first notch of the left monitoring tube is larger than that of the first notch of the right monitoring tube, the length of the double-lumen tube of the right monitoring tube is shorter than that of the double-lumen tube of the left monitoring tube, and the bending angle of the first notch of the right monitoring tube is smaller than that of the first notch of the left monitoring tube. A first protrusion is arranged on the position adjusting belt close to the pulley part, a second protrusion matched with the first protrusion is arranged on the pulley part, the first protrusion and the second protrusion are engaged, and a screw cap is arranged on the pulley part; a spiral spring is arranged in each of the upper end curling part and the lower end curling part, and the spiral barrier strip is connected with the spiral springs of the upper end curling part and the lower end curling part.

2. An electrode-adjustable nerve monitoring dual-lumen cannula as defined in claim 1, wherein: At least part of the length of the double-lumen tube is provided with a covering layer, the covering layer is provided with a strip-shaped opening, the flexible metal sheet is sleeved on the outside of the covering layer, the position of the spiral barrier strip matches the position of the strip-shaped opening, and the upper end curling part and the pulley part are arranged outside the covering layer.

3. An electrode-adjustable nerve monitoring dual-lumen cannula as defined in claim 2, wherein: The upper end curling part includes a first housing cavity, a first fixed shaft and a first spiral spring, the first fixed shaft is arranged at the center position of the first housing cavity, the center position of the first spiral spring is connected with the first fixed shaft, the first spiral spring is arranged in the first housing cavity, and a first opening for the movement of the first spiral spring and the position adjusting belt is arranged on the sidewall of the first housing cavity.

4. An electrode-adjustable nerve monitoring dual-lumen cannula as defined in claim 3, wherein: The lower end curling part comprises a second housing cavity, a second fixed shaft and a second volute spring; the second fixed shaft is arranged at the center position of the second housing cavity, the center position of the second volute spring is connected with the second fixed shaft, the second volute spring is arranged in the second housing cavity, and a second opening for the movement of the second volute spring and the position adjusting belt is arranged on the side wall of the second housing cavity.

5. An electrode-adjustable nerve monitoring dual-lumen cannula according to claim 4, wherein: The pulley part comprises a connecting pulley and a third fixed shaft, the third fixed shaft is arranged at the center position of the connecting pulley, the connecting pulley can rotate relative to the third fixed shaft, a first clamping groove is arranged on the surface of the pulley part opposite to the cap, the first clamping groove is arranged at least two along the circumferential position of the connecting pulley, a rotating cavity matched with the third fixed shaft is arranged at the center position of the cap, and a clamping rod is arranged on the end surface of the cap close to the connecting gear, the position and number of the clamping rod are same as those of the first clamping groove, and the clamping rod is clamped into the first clamping groove.

6. An electrode-adjustable nerve monitoring dual-lumen cannula as defined in claim 5, wherein: The side wall of the double-cavity cannula is further provided with a limiting assembly for limiting the connecting pulley; the limiting assembly comprises a guide cavity, a damping member and a supporting spring, the guide cavity is arranged on the side wall of the double-cavity cannula, the supporting spring is arranged at the bottom of the damping member and the bottom position of the guide cavity, and a handrail is arranged on the side wall away from the damping member of the double-cavity cannula.

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