Fetal spiral electrode

Abstract

The present application relates to a fetal spiral electrode, including an inner frame, a signal electrode, a reference electrode, a wire, a fixed bracket, and a filling glue. The outer surface of the inner frame is provided with a groove. The signal electrode is in the shape of a spiral spring and is spirally engaged with the groove. The head end of the signal electrode protrudes from the head end of the inner frame. The reference electrode is connected to the tail end of the inner frame. The wire includes a first wire and a second wire. The first wire is electrically connected to the signal electrode, and the second wire is electrically connected to the reference electrode. The fixed bracket is in the shape of a cylinder, including a surrounding wall and an end plate provided at the head end of the surrounding wall. The end plate is provided with a first through hole. The inner frame is inserted into the fixed bracket and the head end of the signal electrode extends out of the end plate through the first through hole. The filling glue solidifies the inner frame, the signal electrode, the reference electrode, the wire and the fixed bracket. The fetal spiral electrode provided by the present application is easy to assemble, the signal electrode is not easily damaged during the assembly process, and the risk of the signal electrode breaking is not likely to occur during the use of the fetal spiral electrode.

Description

Technical Field

[0001] The present application relates to the field of medical devices, and more particularly to a fetal spiral electrode for fetal monitoring. Background Art

[0002] At present, the detection of fetal heart rate and uterine contraction is divided into external detection and internal detection. External detection is seriously affected by the outside world, and its collected signals are unstable, and the signals may be intermittent, which affects the diagnosis and causes misdiagnosis or delays in the treatment of the disease.

[0003] Internal detection is more accurate than external detection, and the fetal electrode needs to be fixed on the fetal scalp for data measurement. The existing fetal spiral electrode, signal electrode and reference electrode are directly injection molded. The signal electrode is in the shape of a micro spring, and it is difficult to fix the spring during the molding process. When the mold crushes the spring, it is extremely small and difficult to check, which poses a certain risk. It is easy to cause the spring to break in the fetal scalp during use, or fall into the uterus, posing a risk of medical accidents. Utility Model Content

[0004] The present application provides a fetal spiral electrode to solve the technical problem in the background art that the injection molding mold may crush the spring, resulting in the spring breaking in the fetal scalp or falling into the uterus during later use, resulting in the risk of medical accidents.

[0005] In order to solve the above technical problems, a technical solution adopted by the present application is: to provide a fetal spiral electrode, the fetal spiral electrode comprising:

[0006] An inner frame, with grooves provided on the outer surface;

[0007] A signal electrode, which is in the shape of a spiral spring and is engaged with the groove, and the head end of the signal electrode protrudes from the head end of the inner frame;

[0008] A reference electrode connected to the tail end of the inner skeleton;

[0009] A wire, comprising a first wire and a second wire, wherein the first wire is electrically connected to the signal electrode, and the second wire is electrically connected to the reference electrode;

[0010] The fixed bracket is in a cylindrical shape and comprises a surrounding wall and an end plate provided at the head end of the surrounding wall, the end plate has a first through hole, the inner frame is inserted into the fixed bracket and the head end of the signal electrode extends out of the end plate through the first through hole;

[0011] Filling glue is used to solidify the inner frame, the signal electrode, the reference electrode, and the wire relative to the fixing bracket.

[0012] Optionally, a positioning column is provided on the inner surface of the end plate, and a positioning hole matching the positioning column is provided at the head end of the inner frame.

[0013] Optionally, an axial slot is provided at the tail end of the inner skeleton, and an assembly column is provided at the head end of the reference electrode to be engaged and connected with the axial slot.

[0014] Optionally, the tail end of the inner skeleton is further provided with an insulating wall, and the insulating wall physically insulates and separates the first conductive wire and the second conductive wire.

[0015] Optionally, the first via hole is a spiral via hole.

[0016] Optionally, a diameter of the first via hole on the inner side of the end plate is larger than a diameter of the first via hole on the outer side of the end plate.

[0017] Optionally, a portion of the reference electrode located inside the filling glue is provided with a glue grabbing bone.

[0018] Optionally, the fetal spiral electrode further includes a catheter, and the first wire and the second wire are twisted and sleeved inside the catheter.

[0019] Optionally, a hanging ear is provided on the surrounding wall of the fixing bracket, and the filling glue forms a matching chimeric block with the hanging ear when solidified.

[0020] Optionally, the groove is spiral-shaped.

[0021] The beneficial effects of the present application are as follows: in the assembly method of the fetal spiral electrode provided by the present application, the signal electrode in the shape of a spiral spring is matched and embedded with an inner skeleton with a groove on the outer surface, and the head end of the signal electrode in the shape of a spiral spring spirally passes through the spiral through hole on the fixed bracket, which is not easily subject to unforeseen stress or physical damage during the assembly process, thereby avoiding the risk of medical accidents caused by the spring breaking in the fetal scalp or falling into the uterus during later use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the fetal spiral electrode provided in the embodiment of the application;

[0024] Figure 2 It is a schematic diagram of the exploded structure of the fetal spiral electrode provided in the embodiment of the application;

[0025] Figure 3 It is a schematic diagram of the assembly of the signal electrode and the inner frame in the fetal spiral electrode provided in the embodiment of the application;

[0026] Figure 4 It is a schematic diagram of the three-dimensional structure of a fixing bracket in a fetal spiral electrode provided in an embodiment of the application;

[0027] Figure 5 It is a schematic diagram of the decomposition steps of the assembly process of the fetal spiral electrode provided in the embodiment of the application.

[0028] Description of reference numerals:

[0029] 10. Signal electrode; 20. Reference electrode; 30. Fixed bracket; 40. Wire; 50. Catheter; 201. Assembly column; 202. Grasping glue bone position; 302. Internal skeleton; 303. Filling glue; 401. First wire; 402. Second wire; 3021. Groove; 3022. Positioning hole; 3023. Axial slot; 3024. Insulating wall; 3011. Hanging ear; 3012. Positioning column; 3013. First through hole; 3014. Surrounding wall; 3015. End plate; 3032. Chimeric block. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0031] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back...), such directional indications are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0032] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0033] Please also read Figures 1 to 5 The present application provides a fetal spiral electrode, which includes an inner skeleton 302, a signal electrode 10, a reference electrode 20, a wire 40, a fixing bracket 30 and a filling glue 303.

[0034] Among them, the inner skeleton 302 is roughly cylindrical, and the outer surface of the inner skeleton 302 is provided with a groove 3021. In one embodiment, the groove 3021 can be spiral. The inner skeleton 302 can be made of insulating material, such as plastic material or ceramic material, etc. Necessary alignment and assembly matching structures can be set at both ends of the inner skeleton 302. For details, please refer to the introduction below.

[0035] The signal electrode 10 is in the shape of a spiral spring and is spirally engaged with the groove 3021, and the head end of the signal electrode 10 protrudes from the head end of the inner frame 302. The "head end" in this application is Figure 1 Directions shown are for reference only. Figure 1 The lower middle part, i.e. Figure 1 The position indicated by the numbered line of the signal electrode 10. The signal electrode 10 is a metal spring with good conductivity. The head end of the signal electrode 10 has a sharpened tip in the spiral direction, and the tail end of the signal electrode 10 is straightened to facilitate connection with the first wire 401.

[0036] like Figure 2 As shown in the figure, the reference electrode 20 is roughly in the shape of a long strip. The reference electrode 20 is made of metal and has good conductivity. The head end of the reference electrode 20 is connected to the tail end of the inner skeleton 302. In a specific embodiment, the tail end of the inner skeleton 302 is provided with an axial groove 3023, and the head end of the reference electrode 20 is provided with an assembly column 201 to be engaged with the axial groove (3023).

[0037] The wire 40 includes a first wire 401 and a second wire 402 . The first wire 401 is electrically connected to the signal electrode 10 , and the second wire 402 is electrically connected to the reference electrode 20 , and is used to transmit electrical signals to a back-end detection device during the detection process.

[0038] like Figure 4 As shown, the fixed bracket 30 may be cylindrical, and the fixed bracket 30 includes a surrounding wall 3014 and an end plate 3015 arranged at the head end of the surrounding wall 3014, the end plate 3015 is provided with a first through hole 3013, the inner skeleton 302 is inserted into the fixed bracket 30 and the head end of the signal electrode 10 extends out of the end plate 3015 through the first through hole 3013.

[0039] like Figure 5 As shown:

[0040] In step (a), the inner frame 302, the signal electrode 10, the reference electrode 20, and the wire 40 are first assembled together;

[0041] In step (b), further assembling with the fixing bracket 30 based on step (a);

[0042] In step (c), a filling glue 303 is formed on the basis of step (b), and the filling glue 303 solidifies the inner skeleton 302 , the signal electrode 10 , the reference electrode 20 , and the wire 40 relative to the fixed bracket 30 .

[0043] In one embodiment, in order to improve circuit stability and avoid short circuit between the first wire 401 and the second wire 402, the tail end of the inner frame 302 may be further provided with an insulating wall 3024, and the insulating wall 3024 physically insulates and separates the first wire 401 and the second wire 402.

[0044] In one embodiment, the first via hole 3013 is a spiral via hole. Furthermore, the diameter of the first via hole 3013 on the inner side of the end plate 3015 is larger than the diameter of the first via hole 301 on the outer side of the end plate 3015. That is to say, the diameter of the spiral via hole gradually decreases from the inside to the outside, which is convenient for the installation of the signal electrode 10 and can reduce or even completely avoid the overflow of the filling glue 303 through the first via hole 3013 during the filling process.

[0045] like Figure 2 As shown in the figure, in order to improve the structural strength and stability of the product, the part of the reference electrode 20 located on the inner side of the filling glue 303 (or the waist area) can be provided with a glue grabbing bone position 202, and the glue grabbing bone position 202 can be in the form of a groove, a serrated groove, a bump, etc.

[0046] In addition, the fetal spiral electrode further comprises a catheter 50 , and the first wire 401 and the second wire 402 are twisted and sleeved inside the catheter 50 .

[0047] Furthermore, a hanging ear 3011 is provided on the tail end of the surrounding wall 3014 of the fixed bracket (30), the filling glue 303 is a flexible plug body, and a fitting block 3032 matching the hanging ear 3011 is provided. When solidified, a matching fitting block 3032 is formed in the hanging ear 3011. The hanging ear 3011 can be in the form of a through hole or in the form of a non-through buckle.

[0048] In summary, it is easy for those skilled in the art to understand that in the fetal spiral electrode provided by the present application, the signal electrode 10 in the shape of a spiral spring is matched and fits with the inner skeleton 302 having a groove 3021 on the outer surface, and the head end of the signal electrode 10 in the shape of a spiral spring spirally passes through the spiral through hole on the fixed bracket 30. During the assembly process, the signal electrode 10 in the shape of a spiral spring is not easily subjected to unforeseen stress and physical damage, thereby avoiding the risk of medical accidents caused by the spring breaking in the fetal scalp or falling into the uterus during later use.

[0049] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. For those skilled in the art, various equivalent replacements, modifications and deformations can be made to the above embodiments without departing from the principles and spirit of the present application. Therefore, all equivalent changes made according to the structure, shape and principle of the present application should be included in the protection scope of the present application.

Claims

1. A fetal spiral electrode, characterized in that: The fetal spiral electrode comprises: An inner frame (302) having an outer surface provided with a groove (3021); The signal electrode (10) is in the shape of a spiral spring and is engaged with the groove (3021), and the head end of the signal electrode (10) protrudes from the head end of the inner skeleton (302); A reference electrode (20) connected to the tail end of the inner skeleton (302); A conductor (40) comprising a first conductor (401) and a second conductor (402), wherein the first conductor (401) is electrically connected to the signal electrode (10), and the second conductor (402) is electrically connected to the reference electrode (20); The fixed bracket (30) is cylindrical and comprises a surrounding wall (3014) and an end plate (3015) provided at the head end of the surrounding wall (3014); the end plate (3015) is provided with a first through hole (3013); the inner frame (302) is inserted into the fixed bracket (30) and the head end of the signal electrode (10) extends out of the end plate (3015) through the first through hole (3013); The filling glue (303) is used to solidify the inner frame (302), the signal electrode (10), the reference electrode (20), and the lead (40) relative to the fixing bracket (30).

2. The fetal spiral electrode according to claim 1, characterized in that: The inner surface of the end plate (3015) is provided with a positioning column (3012), and the head end of the inner frame (302) is provided with a positioning hole (3022) matching the positioning column (3012).

3. The fetal spiral electrode according to claim 1, characterized in that: An axial slot (3023) is provided at the tail end of the inner skeleton (302), and an assembly column (201) is provided at the head end of the reference electrode (20) to engage and connect with the axial slot (3023).

4. The fetal spiral electrode according to claim 1, characterized in that: An insulating wall (3024) is further provided at the tail end of the inner skeleton (302), and the insulating wall (3024) physically insulates and separates the first conductive wire (401) and the second conductive wire (402).

5. The fetal spiral electrode according to claim 1, characterized in that: The first via hole (3013) is a spiral via hole.

6. The fetal spiral electrode according to claim 5, characterized in that: The diameter of the first through hole (3013) on the inner side of the end plate (3015) is larger than the diameter of the first through hole (3013) on the outer side of the end plate (3015).

7. The fetal spiral electrode according to claim 1, characterized in that: The portion of the reference electrode (20) located inside the filling glue (303) is provided with a glue grabbing bone position (202).

8. The fetal spiral electrode according to claim 1, characterized in that: The fetal spiral electrode further comprises a catheter (50), wherein the first conductive wire (401) and the second conductive wire (402) are in a twisted pair and are sleeved inside the catheter (50).

9. The fetal spiral electrode according to claim 1, characterized in that: A hanging ear (3011) is provided on the surrounding wall (3014) of the fixing bracket (30), and a matching chimeric block (3032) is formed in the hanging ear (3011) when the filling glue (303) is cured.

10. The fetal spiral electrode according to claim 1, characterized in that: The groove is spiral-shaped.

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