Adjustable curved ring lung mapping catheter

Abstract

The invention discloses an adjustable bending ring lung mapping catheter which comprises a catheter body and an adjusting rod, the catheter body comprises a pushing section and a bending adjusting section, the bending adjusting section is provided with a plurality of mapping electrodes, the pushing section is provided with a first channel, and the bending adjusting section is provided with a second channel; an inner cavity communicated with the second channel and a communicating hole communicated with the inner cavity are further formed in the end part of the bending adjusting section; the pipe body is further provided with a penetrating hole part, and the first channel and the second channel are both communicated with the penetrating hole part. The adjusting rod penetrates through the penetrating hole part and comprises a drawing section, a bending section and a winding section, the end of the winding section is connected with a pull wire, and the pull wire passes through the communicating hole, the inner cavity, the second channel and the first channel; the winding section can enter the inner cavity through the connecting hole when being straightened, and the winding section is located in the inner cavity and cannot pass through the communicating hole after the shape of the winding section is recovered. The ring diameter of the mapping catheter can be adjusted, so that the mapping catheter is suitable for different people.

Description

Technical Field

[0001] The present application relates to the field of medical devices, and in particular to an adjustable curved ring lung mapping catheter. Background Art

[0002] The circumpulmonary mapping catheter is mainly used for cardiac electrophysiological examination, especially for atrial fibrillation examination. The circumpulmonary mapping catheter can accurately collect and record electrophysiological signals in the heart by using mapping electrodes, and the distal end of the circumpulmonary mapping catheter has a bending section, and the bending section has multiple mapping electrodes, thereby achieving more efficient mapping of electrophysiological signals.

[0003] However, the diameter of the circumferential lung mapping catheters currently used is mostly non-adjustable. Different patients have different pulmonary vein sizes due to differences in gender and body shape, and mapping catheters with non-adjustable diameters have poor adaptability to different patients. Summary of the invention

[0004] Purpose of the invention: This application aims to overcome the defects of the prior art and provide an adjustable curved ring lung mapping catheter.

[0005] Technical solution: An adjustable curved ring lung mapping catheter comprises a tube body and an adjusting rod, wherein the tube body comprises a pushing section and a bending adjustment section, the bending adjustment section has a plurality of mapping electrodes, the pushing section has a first channel, the bending adjustment section has a second channel, and the end of the bending adjustment section also has an inner cavity connected to the second channel and a connecting hole connected to the inner cavity; the tube body also has a perforated portion, and both the first channel and the second channel are connected to the perforated portion; the adjusting rod passes through the perforated portion, and the adjusting rod comprises a pulling section, a bending section and a winding section, and a pull wire is connected to the end of the winding section, and the pull wire passes through the connecting hole, the inner cavity, the second channel and the first channel; when the winding section is straightened, it can pass through the connecting hole to enter the inner cavity, and the winding section is located in the inner cavity and cannot pass through the connecting hole after restoring its shape.

[0006] Furthermore, the tube body is also provided with a developing ring.

[0007] Furthermore, the inner cavity is a spherical inner cavity.

[0008] Therefore, after the winding section recovers its shape, it can form a locking fit with the inner cavity, and this locking does not need to be very tight, as long as the winding section does not fall off from the inner cavity, and the adjustment of the bending section circle diameter can be achieved by pulling the adjustment rod.

[0009] Furthermore, the number of the mapping electrodes is 5-10.

[0010] Furthermore, the plurality of mapping electrodes are distributed at equal intervals.

[0011] Furthermore, the bending section of the tube body has a memory alloy, and when there is no external force, the bending section is in a ring shape with an opening.

[0012] Furthermore, the winding section has a memory alloy, and when there is no external force, the winding section is in a spiral shape.

[0013] Furthermore, the bending section of the adjusting rod has a memory alloy, and when there is no external force, the bending section and the pulling section are distributed in an L shape.

[0014] Beneficial effects: The circumferential lung mapping catheter of the present application can detect the location of the lesion by using the bending section, and the diameter of the circumferential lung is adjustable to accommodate more pulmonary vein sizes.

[0015] The adjustment method of the ring diameter of the circumferential lung mapping catheter of the present application is more convenient, and the adjustment is more flexible and accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the mapping catheter from the first perspective;

[0017] Figure 2 This is an enlarged view of area A;

[0018] Figure 3 This is an enlarged view of area B;

[0019] Figure 4 This is a schematic diagram of the second viewing angle of the mapping catheter;

[0020] Figure 5 This is an enlarged view of area C;

[0021] Figure 6 This is a third-angle diagram of the mapping catheter;

[0022] Figure 7 This is an enlarged view of area D.

[0023] For the sake of clarity, a section of the pushing section is cut open for display, and the end of the bending section is cut open for display. DETAILED DESCRIPTION

[0024] Reference numerals: 1 tube body; 1.1 pushing section; 1.1.1 first channel; 1.2 bending section; 1.2.1 connecting hole; 1.2.2 inner cavity; 1.2.3 second channel; 1.2.4 mapping electrode;

[0025] 2 Adjusting rod; 2.1 Pulling section; 2.2 Bending section; 2.3 Winding section;

[0026] 3. Pull wire; 4. Punch hole.

[0027] As shown in the figure, an adjustable curved ring lung mapping catheter includes a tube body 1 and an adjusting rod 2, wherein the tube body 1 includes a push section 1.1 and a bending section 1.2, wherein the bending section 1.2 has a plurality of mapping electrodes 1.2.4, the push section 1.1 has a first channel 1.1.1, the bending section 1.2 has a second channel 1.2.3, and the end of the bending section 1.2.3 also has an inner cavity 1.2.2 connected to the second channel 1.2.3 and a connecting hole 1.2.1 connected to the inner cavity 1.2.2; the tube body 1 also has a perforated portion 4, wherein the first channel 1.1.1 and the second channel 1.2.3 are both connected to the perforated portion 4; the adjusting rod 2 passes through the perforated portion 4, and the adjusting rod 2 includes a pulling section 2.1, a bending section 2.2 and a winding section 2.3, and the end of the winding section 2.3 is connected with a pull wire 3, and the pull wire 3 passes through the connecting hole 1.2.1, the inner cavity 1.2.2, the second channel 1.2.3 and the first channel 1.1.1; when the winding section 2.3 is straightened, it can pass through the connecting hole 1.2.1 into the inner cavity 1.2.2, and the winding section 2.3 is located in the inner cavity 1.2.2 and cannot pass through the connecting hole 1.2.1 after restoring its shape.

[0028] The tube body 1 also has a developing ring. The inner cavity 1.2.2 is a spherical inner cavity. There are 5-10 marking electrodes 1.2.4. Multiple marking electrodes 1.2.4 are distributed at equal intervals. The bending adjustment section 1.2 of the tube body 1 has a memory alloy, and when there is no external force, the bending adjustment section 1.2 is in the shape of a ring with an opening. The winding section 2.3 has a memory alloy, and when there is no external force, the winding section 2.3 is spiral. The bending section 2.2 of the adjusting rod 2 has a memory alloy, and when there is no external force, the bending section 2.2 and the pulling section 2.1 are distributed in an L shape.

[0029] The circumferential lung mapping catheter of the present application comprises a tube body and an adjusting rod, wherein the tube body has a bending section, and under the action of the memory alloy, when the tube body extends out of the sheath, the bending section can automatically restore to a ring shape with an opening, and the diameter of the bending section can be adjusted by using the adjusting rod.

[0030] Specifically, when the bending section extends out of the sheath, it automatically returns to a ring shape with an opening, and at this time, pulling the pull wire toward the proximal end can straighten the winding section and enter the inner cavity along the connecting hole. Then, the pull wire is slightly released toward the distal end, so that under the action of the memory alloy, the winding section returns to its original shape, and the winding section is located in the inner cavity and locked with the inner cavity, and will not fall off from the inner cavity. At this time, pushing the adjustment rod toward the distal end can increase the circle diameter of the bending section of the tube body, and pulling the adjustment rod toward the proximal end can reduce the circle diameter of the bending section of the tube body, so that the circle diameter can be adjusted well, so that pulmonary vein orifices of different sizes can be mapped.

[0031] After the mapping is completed, the adjusting rod is pulled toward the proximal end, and the winding section is straightened under the action of external force and can pass through the connecting hole. Then the adjusting rod is pulled toward the proximal end, and the pull wire is continuously released toward the distal end, so that the adjusting rod is retracted into the first channel, and the pull wire between the winding section and the connecting hole will stick to the outer wall of the bending section, so that the mapping catheter can be retracted into the sheath.

[0032] Although the present invention has been illustrated and described with respect to the preferred embodiments, it will be appreciated by those skilled in the art that various changes and modifications may be made to the present invention without departing from the scope of the present invention as defined by the claims.

Claims

1. An adjustable curved lung mapping catheter, characterized in that: It comprises a tube body and an adjusting rod, wherein the tube body comprises a pushing section and a bending adjusting section, the bending adjusting section has a plurality of marking electrodes, the pushing section has a first channel, the bending adjusting section has a second channel, and the end of the bending adjusting section also has an inner cavity connected to the second channel and a connecting hole connected to the inner cavity; the tube body also has a perforated portion, and both the first channel and the second channel are connected to the perforated portion; the adjusting rod passes through the perforated portion, and the adjusting rod comprises a pulling section, a bending section and a winding section, and a pulling wire is connected to the end of the winding section, and the pulling wire passes through the connecting hole, the inner cavity, the second channel and the first channel; when the winding section is straightened, it can pass through the connecting hole to enter the inner cavity, and the winding section is located in the inner cavity and cannot pass through the connecting hole after restoring its shape.

2. The adjustable curved ring lung mapping catheter according to claim 1, characterized in that: The tube body is also provided with a developing ring.

3. The adjustable curved ring lung mapping catheter according to claim 1, characterized in that: The inner cavity is a spherical inner cavity.

4. The adjustable curved lung mapping catheter according to claim 1, characterized in that: The number of the mapping electrodes is 5-10.

5. The adjustable curved ring lung mapping catheter according to claim 1, characterized in that: Multiple mapping electrodes are distributed at equal intervals.

6. The adjustable curved lung mapping catheter according to claim 1, characterized in that: The bending section of the tube body is provided with a memory alloy, and when there is no external force, the bending section is in a ring shape with an opening.

7. The adjustable curved lung mapping catheter according to claim 1, characterized in that: The winding section comprises a memory alloy, and when there is no external force, the winding section is in a spiral shape.

8. The adjustable curved lung mapping catheter according to claim 1, characterized in that: The bending section of the adjusting rod is provided with a memory alloy, and when there is no external force, the bending section and the pulling section are distributed in an L shape.

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