Flexible electrode trachea cannula
By using flexible electrode sheets on the tracheal intubation, the existing wire electrode signal acquisition is solved, and more stable signal acquisition and better human tissue protection are achieved.
Patent Information
- Application Number
- CN202421773143.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-24
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-07-24
AI Technical Summary
The wire electrodes of existing tracheal intubation have small contact area with human tissue, unstable signal collection, and easy to slip, which increases damage to human tissue.
A flexible electrode sheet is adopted, including a polymer substrate and a plurality of curved electrodes. The curved electrodes are in a wavy line shape and are fixedly connected to the tracheal intubation body through the connection part of the polymer substrate, which increases the contact area and connection stability of the electrodes and human tissue.
The contact area between the electrode and human tissue is improved, the stability of signal acquisition is enhanced, the electrode sheet is prevented from slipping, and damage to human tissue is reduced.
Smart Images
Figure CN222899925U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical devices, in particular to a flexible electrode endotracheal tube. Background Art
[0002] An endotracheal tube is a product used in surgeries for preventing and dealing with airway patency. It can keep the patient's airway unobstructed and obtain laryngeal nerve activity signals through electrodes, and is a commonly used tool for intraoperative monitoring of the recurrent laryngeal nerve signals of patients.
[0003] Currently, most of the electrodes at the front end of intraoperative monitoring endotracheal tubes are wire-type electrodes. The contact area between them and human tissues is small, and signal acquisition is unstable. In addition, the friction between the wire-type electrodes and the tube wall is small, and they are prone to slipping during use, and their sharp parts will increase the damage to human tissues.
[0004] Therefore, there is an urgent need for a new endotracheal tube to solve the above problems. Summary of the Invention
[0005] To solve the above technical problems and achieve the above object, the utility model adopts the following technical solutions:
[0006] The utility model provides a flexible electrode endotracheal tube, which includes:
[0007] An endotracheal tube body, with a positioning balloon arranged at the distal end of the endotracheal tube body;
[0008] A flexible electrode sheet, which is wound and wrapped around the tube wall of the endotracheal tube body and is located proximal to the positioning balloon; the flexible electrode sheet includes a polymer substrate and a plurality of curved electrodes attached to the polymer substrate, and the curved electrodes are in a wavy shape;
[0009] The polymer substrate forms a first connection part and a second connection part at the proximal end and the distal end of the flexible electrode sheet respectively, and the flexible electrode sheet is fixedly connected to the endotracheal tube body through the first connection part and the second connection part;
[0010] A PVC film with glue is pasted at the double-sided seam of the flexible electrode sheet wound and wrapped around the endotracheal tube body, and the first connection part and the second connection part are fixed to the tube wall of the endotracheal tube body by sleeve hot melting.
[0011] Further, the plurality of curved electrodes are located between the first connection part and the second connection part, the polymer substrate between adjacent curved electrodes is hollowed out, and the plurality of curved electrodes can move relative to the endotracheal tube body.
[0012] Further, the tracheal intubation body is made of PVC material, and the curved electrode is made of PI material.
[0013] Further, the tracheal intubation body is arc-shaped, and the radian of the arc is 14°-16°. The curved electrode close to the inner side of the arc of the intubation body is the inner curved electrode, and the curved electrode close to the outer side of the arc of the intubation body is the outer curved electrode. The amplitude of at least part of the wavy lines of the inner curved electrode is smaller than that of the outer curved electrode.
[0014] Further, the curved electrode includes multiple groups of electrodes, and each group of electrodes includes a proximal region, a middle region, and a distal region, wherein the distance between the electrodes in the middle region is greater than the distance between the electrodes in the proximal and / or distal regions.
[0015] Further, the curved electrode includes two groups of electrodes, and the distribution of the two groups of electrodes on the intubation body is close to the inner arc side of the intubation. The distance between the two groups of electrodes on the inner arc side of the intubation is smaller than the distance on the outer arc side.
[0016] Further, it further includes a wire, the wire is electrically connected to the flexible electrode sheet on the inner surface of the first connection part, and is buried in the tube wall of the tracheal intubation body, and the wrapping material of the wire is Teflon.
[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0018] (1) The present utility model adopts the process of flexible pcb, and designs the electrode into a sheet shape. The flexible electrode sheet includes a polymer substrate and a plurality of curved electrodes attached to the polymer substrate. The curved electrodes are in a wavy line shape. Such a design increases the contact area between the electrode and human tissue, enables a longer length of curved electrode to be arranged in an electrode sheet of the same length, and greatly enhances the maximum deformability. Further, when the flexible electrode sheet is wound and wrapped around the intubation body, first, the bilateral seam of the polymer substrate of the flexible electrode sheet is pasted with a PVC film with glue, so as to avoid sharp edges of the substrate from scratching human tissue. Then, the first connection part and the second connection part on both sides of the flexible electrode sheet are fixedly connected to the intubation body through an elastic PVC cuff, which increases the connection stability between the flexible electrode sheet and the intubation body and prevents the electrode sheet from slipping off.
[0019] (2) The substrate between adjacent curved electrodes on the flexible electrode sheet of the present utility model is hollowed out, so that the plurality of curved electrodes can move relative to the tracheal intubation body, increasing the flexibility of the curved electrodes, and enabling the curved electrodes to bend and twist to better adapt to the morphological changes of the laryngeal tissue.
[0020] (3) The wavy amplitude of the curved electrode and the spacing between adjacent curved electrodes are variable. In the present utility model, by designing that at least part of the wavy amplitude of the curved electrode close to the inner arc of the intubation body is smaller than that of the curved electrode close to the outer arc of the intubation body, the spacing between the curved electrodes in the same group is increased, and the probability of short circuit between the curved electrodes in the same group is reduced.
[0021] (4) In each group of curved electrodes, since the deformability of the middle region is greater than that of the proximal and distal regions, short circuit is more likely to occur between the electrodes in the middle region. Therefore, by designing that the spacing between the electrodes in the middle region is greater than that between the electrodes in the proximal and / or distal regions, the probability of short circuit between the electrodes in the same group is also reduced. Brief Description of the Drawings
[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.
[0023] Figure 1 It is an overall view of the tracheal intubation of the present utility model.
[0024] Figure 2 It is a winding diagram of the flexible electrode sheet on the tracheal intubation of the present utility model.
[0025] Figure 3 It is a planar projection diagram of a flexible electrode sheet disclosed in an embodiment of the present utility model.
[0026] Figure 4 It is a schematic diagram of the connection mode between the curved electrode on the inner surface of the flexible electrode sheet and the wire of the present utility model.
[0027] Figure 5 It is a diagram of the change in electrode amplitude disclosed in an embodiment of the present utility model.
[0028] Figure 6 It is a diagram of the arrangement of electrode spacing disclosed in an embodiment of the present utility model.
[0029] Reference Numerals: 1 is the tracheal intubation body; 2 is the positioning balloon; 3 is the flexible electrode sheet; 4 is the polymer substrate; 5 is the curved electrode, 5.1 is the first electrode, 5.2 is the second electrode, 5.3 is the third electrode, 5.4 is the fourth electrode; 6.1 is the first connection part; 6.2 is the second connection part; 7 is the electrode connection point; 8 is the wire. Detailed Description of the Embodiments
[0030] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the accompanying drawings of the present utility model. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.
[0031] Here, the exemplary embodiments will be described in detail, and the examples are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.
[0032] Embodiment 1
[0033] As Figure 1-2 shown, the present utility model discloses a flexible electrode endotracheal tube, which includes an endotracheal tube body 1, a positioning balloon 2, and a flexible electrode sheet 3; wherein, the positioning balloon 2 is arranged at the distal end of the endotracheal tube body 1, and the flexible electrode sheet 3 is wound around and wrapped on the tube wall of the endotracheal tube body 1 and is located proximal to the positioning balloon 2.
[0034] Referring to Figure 3 , the flexible electrode sheet 3 includes a polymer substrate 4 and four curved electrodes 5 attached to the substrate 4, and the four curved electrodes 5 are wavy curved electrodes.
[0035] The four curved electrodes 5 include a set of electrodes on the upper and lower sides. In other embodiments, the number of curved electrodes can be selected as six, eight, etc. Among them, the flexible electrode sheet 3 is formed by first tightly connecting a metal electrode material and a polymer substrate 4 together, then using a lithography technique to form a plurality of curved photoresist structures on the polymer substrate 4, and then removing the unprotected metal material part by chemical or electrochemical etching methods to form a plurality of curved electrodes 5, and performing a gold plating treatment on the formed plurality of curved electrodes 5. Preferably, the material of the substrate 4 is polyimide.
[0036] The substrate 4 forms a first connection portion 6.1 and a second connection portion 6.2 at the proximal and distal ends of the flexible electrode sheet 3 respectively, and the flexible electrode sheet 3 is integrally wound and fixedly connected to the endotracheal tube body 1 through the first connection portion 6.1 and the second connection portion 6.2.
[0037] Specifically, first, the flexible electrode sheet 3 is wound and wrapped around a suitable position of the intubation tube body 1, and a PVC film with glue is attached to the bilateral seams of the polymer substrate 4 of the flexible electrode sheet 3 to prevent the substrate from warping and scratching human tissues. Then, cuffs are put on the first connection part 6.1 and the second connection part 6.2 of the flexible electrode sheet 3. Finally, the flexible electrode sheet 3 is wrapped and fixed on the tracheal intubation tube body 1 by heat shrinking the cuffs. The thickness of the PVC film is 0.05 mm.
[0038] Furthermore, the intubation tube also includes wires. Refer to Figure 4 , and a plurality of wire connection points 7 are arranged on the inner side of the second connection part 6.2 near one end of the intubation tube body 1. After a plurality of wires 8 are connected to a plurality of curved electrodes 5 through the connection points 7 on the inner surface of the flexible electrode sheet 3 and gathered together, they are jointly buried in the tube wall of the tracheal intubation tube body 1. Preferably, the wrapping material of the wire 8 is Teflon, and the number of the wires 8 corresponds to the number of the plurality of curved electrodes 5 one by one.
[0039] After adopting the above scheme, compared with the wire-type electrode structure used in the prior art, the contact area between the electrode and human tissues is significantly increased, making the signal acquisition more stable. In addition, when the flexible electrode sheet is wound and wrapped around the intubation tube body, the bilateral seams of the polymer substrate of the flexible electrode sheet are first pasted with a PVC film with glue, so as to prevent the sharp edges of the substrate from scratching human tissues. Then, the first connection part and the second connection part on both sides of the flexible electrode sheet are fixedly connected to the intubation tube body through an elastic PVC cuff, increasing the connection stability between the flexible electrode sheet and the intubation tube body and preventing the electrode sheet from slipping off.
[0040] Embodiment 2
[0041] The difference between Embodiment 2 and Embodiment 1 is that the polymer substrate 4 between the four curved electrodes 5 is hollowed out.
[0042] It can be understood that after adopting the above scheme, the curved electrode 5 of the present utility model can move relative to the tracheal intubation tube body 1, significantly increasing the flexibility of the curved electrode 5, so that the curved electrode 5 can be bent and twisted to better adapt to the morphological changes of the laryngeal tissues.
[0043] Embodiment 3
[0044] The difference between Embodiment 3 and Embodiment 1 is that the amplitude of the wavy line of the curved electrode near the inner arc of the intubation tube body is different from the amplitude of the curved electrode near the outer arc of the intubation tube body.
[0045] Refer to Figure 5, the curved electrode includes a first group of electrodes (5.1, 5.2) and a second group of electrodes (5.3, 5.4), the tracheal intubation body 1 is arc-shaped, and the radian of the arc is 15°. Among them, the curved electrodes (5.2, 5.3) close to the inner side of the arc of the intubation body 1 are the inner curved electrodes, and the curved electrodes (5.1, 5.4) close to the outer side of the arc of the intubation body 1 are the outer curved electrodes. At least part of the wavy line amplitude of the inner curved electrodes (5.2, 5.3) is smaller than the wavy line amplitude of the outer curved electrodes (5.1, 5.4). Since the wavy line amplitude of the inner curved electrodes (5.2, 5.3) becomes smaller, the distance between the curved electrodes in the same group (5.1 and 5.2, 5.3 and 5.4) increases, reducing the probability of short circuit between the electrodes in the same group; at the same time, the amplitude of the inner curved electrodes (5.2, 5.3) becomes smaller, and the contact between the first group of electrodes (5.1 and 5.2) and the second group of electrodes (5.3 and 5.4) is also reduced.
[0046] Example 4
[0047] The difference between Example 4 and Example 1 is that: in each group of the electrodes, the distance between the electrodes in the middle region is greater than the distance between the electrodes in the proximal and / or distal regions.
[0048] See Figure 6 , the curved electrode includes a first group of electrodes (5.1, 5.2) and a second group of electrodes (5.3, 5.4). In the first group of electrodes (5.1 and 5.2), the distance between the first electrode 5.1 and the second electrode 5.2 close to the proximal and / or distal regions is smaller, and the distance between the first electrode 5.1 and the second electrode 5.2 close to the middle region is larger. The second group of electrodes (5.3 and 5.4) are arranged at the same distance. Since the deformability of the electrodes in the middle region is greater than that of the electrodes in the proximal / distal regions, short circuit is more likely to occur between the electrodes in the middle region. Therefore, designing the distance between the electrodes in the middle region to be greater than the distance between the electrodes in the proximal and / or distal regions also reduces the probability of short circuit between the electrodes in the same group.
[0049] Example 5
[0050] The difference between Example 5 and Example 1 is that: in order to make the electrodes better fit the vocal cord muscles, the first group of electrodes (5.1 and 5.2) and the second group of electrodes (5.3 and 5.4) are both distributed close to the inner arc side of the intubation body 1, that is, the distance between the two groups of electrodes on the inner arc side of the intubation is smaller than the distance on the outer arc side.
[0051] The preferred embodiments of the present application are described in detail above. However, the present application is not limited thereto. Within the scope of the technical concept of the present application, various simple modifications can be made to the technical solutions of the present application, including any other suitable combination of each technical feature. These simple modifications and combinations should also be regarded as the content disclosed by the present application and fall within the protection scope of the present application.
Claims
1. A flexible electrode endotracheal tube, comprising: An endotracheal tube body, wherein a positioning balloon is provided at the distal end of the endotracheal tube body; A flexible electrode sheet, which is wrapped around the tube wall of the endotracheal tube body and located at the proximal end of the positioning balloon; the flexible electrode sheet comprises a polymer substrate and a plurality of curved electrodes attached to the polymer substrate, and the curved electrodes are in the shape of wavy lines; Features: The polymer substrate forms a first connection portion and a second connection portion at the proximal end and the distal end of the flexible electrode sheet, respectively, and the flexible electrode sheet is fixedly connected to the endotracheal tube body through the first connection portion and the second connection portion; The double-sided seams of the flexible electrode sheet wrapped around the endotracheal tube body are affixed with PVC films with glue, and the first connecting part and the second connecting part are fixed to the tube wall of the endotracheal tube body by hot-melting through the cuff.
2. The flexible electrode endotracheal tube according to claim 1, characterized in that: The plurality of curved electrodes are located between the first connecting portion and the second connecting portion, the polymer substrate between adjacent curved electrodes is hollowed out, and the plurality of curved electrodes and the endotracheal tube body are relatively movable.
3. The flexible electrode endotracheal cannula according to any one of claims 1 to 2, characterized in that: The endotracheal tube body is made of PVC material, and the curved electrode is made of PI material.
4. The flexible electrode endotracheal tube according to any one of claims 1-2, characterized in that: The tracheal tube body is arc-shaped, and the curvature of the arc is 14°-16°. The curved electrode close to the inner side of the arc of the tube body is the inner curved electrode, and the curved electrode close to the outer side of the arc of the tube body is the outer curved electrode. The amplitude of at least part of the wave line of the inner curved electrode is smaller than the amplitude of the wave line of the outer curved electrode.
5. The flexible electrode endotracheal tube according to any one of claims 1 to 2, characterized in that: The curved electrode comprises a plurality of groups of electrodes, each group of electrodes comprises a proximal region, a middle region and a distal region, wherein the spacing between the electrodes in the middle region is greater than the spacing between the electrodes in the proximal and / or distal regions.
6. The flexible electrode endotracheal tube according to any one of claims 1-2, characterized in that: The curved electrode comprises two groups of electrodes, and the two groups of electrodes are both distributed on the cannula body close to the inner arc side of the cannula, and the spacing between the two groups of electrodes on the inner arc side of the cannula is smaller than the spacing on the outer arc side.
7. The flexible electrode endotracheal tube according to any one of claims 1-2, characterized in that: It also includes a wire, which is electrically connected to the electrode sheet on the inner surface of the first connecting portion and is embedded in the tube wall of the endotracheal tube body. The wrapping material of the wire is Teflon.