A right ventricular electrode delivery sheath with steerable tip

Abstract

The utility model provides a right ventricle electrode delivery sheath pipe with controllable head, including sheath pipe body, the centre of sheath pipe body is provided with the guide wire channel through, the distal end of sheath pipe body is provided with controllable head, controllable head includes bending section, the bending section is from far to near in proper order for first bending section, second bending section, all be provided with electroactive polymer layer in bending section, wherein the electroactive polymer layer in first bending section is around the circumference of sheath pipe body and is along the axial extension of sheath pipe body;The electroactive polymer layer in second bending section is around sheath pipe body concentric arrangement;The proximal end of sheath pipe body is provided with control handle, and the pipe wall of sheath pipe body is equipped with a few flexible wires, and electroactive polymer layer all are through flexible wire and control handle's drive module electricity is connected. The utility model adopts first bending section for realizing small amplitude's bending;Second bending section is used for realizing larger amplitude's bending;Through the mode of sectional regulation realizes more accurate control controllable head's position.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a right ventricular electrode delivery sheath with a controllable head. Background Technology

[0002] Pacemaker implantation is the safest and most effective treatment for bradycardia. During this procedure, the main pathway for pacemaker implantation is via the cephalic vein / axillary vein / subclavian vein. However, two common technical challenges arise during pacemaker electrode implantation: firstly, how to smoothly guide the electrode across the tricuspid valve annulus; and secondly, how to accurately locate and position the appropriate target site. Clinically, the wire is often first shaped into a suitably sized umbrella-shaped support electrode and bent over the tricuspid valve annulus. Then the wire is removed and replaced with a straight wire, or reshaped into a 3D curved or gooseneck shape, or a delivery sheath of C315 / C304 type is used to adjust the position of the electrode in the ventricle until a suitable target point is found. Because each person's heart size, shape, and direction of rotation are different, the surgeon often needs to remove and reshape the wire multiple times during the operation to adapt to the different cardiac structures of different patients. This process not only increases the operation time, but also increases the risks of bleeding, infection, guidewire breakage, etc., and may even require re-puncture of the vein, increasing the risk of hemopneumothorax, arteriovenous fistula, etc.

[0003] The current clinical procedure for implanting a right ventricular electrode via the cephalic vein / subclavian vein / axillary vein is as follows: In the first method, the cephalic vein, subclavian vein, or axillary vein is punctured. A guidewire is inserted into the right atrium along the vein, and the sheath is advanced to the superior vena cava along the guidewire. The guidewire is withdrawn, and the electrode containing the straight wire is advanced into the right atrium. The straight wire is then withdrawn and replaced with a curved wire with a handle-shaped tip. The size of the handle depends on the size of the right atrium. After inserting the curved wire, the wire is rotated counterclockwise, and the electrode is advanced forward, passing through the tricuspid valve into the right ventricle and then reaching the pulmonary artery. If the right ventricular electrode is to be placed at the apex of the heart, the curved wire is pulled out, the straight wire is slowly inserted, and the electrode is withdrawn. The electrode tip is advanced to the apex of the right ventricle. For passive electrodes, slight force is applied to ensure close contact with the endocardium. The straight wire is pulled out to the superior vena cava, and then the electrode is gently pulled until the electrode tip is hooked by the trabeculae and the tip does not move. Then the straight wire is inserted again and gently pressed against the endocardium. Pull out the wire and test the intracardiac electrocardiogram and parameters. For the active electrode, apply slight force to ensure close contact with the endocardium and test the intracardiac electrocardiogram and parameters. If the parameters are appropriate, push the electrode without moving the electrode head and rotate the active electrode screw until the tip is completely out. Test the intracardiac electrocardiogram and parameters again. If you want to place the right ventricular electrode in the left bundle branch region / high right ventricular septum, pull out the bent wire, reshape it into a 3D bend or swan neck bend, slowly insert the wire, adjust the electrode position in the right ventricular septum, and test the intracardiac electrocardiogram and parameters. If the parameters are appropriate, push the electrode without moving the electrode head and rotate the electrode until the tip is completely out. This method has the following technical drawbacks: it requires continuous wire exchange to pass through the tricuspid valve and reach the corresponding position in the ventricle.

[0004] In the second method, a puncture is performed on the cephalic vein, subclavian vein, or axillary vein. A guidewire is inserted along the vein into the right atrium, and a delivery sheath of type C315 / C304 is advanced along the guidewire into the right atrium. The guidewire is then withdrawn, the sheath is rotated, and the sheath is pushed through the tricuspid valve annulus. The sheath is readjusted to the appropriate position, and an electrode is inserted. The electrode is rotated so that its tip is fully exposed. The second method does not require the use of a shaping wire, but it has the following technical drawbacks: it is difficult to adjust the position of the sheath tip, and the operation is inconvenient.

[0005] Therefore, how to design a right ventricular electrode delivery sheath with a controllable head that allows for easy adjustment of the sheath tip position, and how to design a right ventricular electrode delivery sheath with a controllable head that prevents the electrode from being pulled back into the atrium when the wire is withdrawn, have become urgent problems to be solved. Utility Model Content

[0006] In view of the problems existing in the prior art, this utility model provides a right ventricular electrode delivery sheath with a controllable head to solve at least one of the above-mentioned technical problems.

[0007] The technical solution of this utility model is as follows: a right ventricular electrode delivery sheath with a controllable head, comprising a sheath body, a guidewire channel penetrating through the center of the sheath body, a controllable head at the distal end of the sheath body, the controllable head comprising a bending section, the bending section being a first bending section and a second bending section from distal to proximal, each bending section being provided with an electroactive polymer layer, wherein the electroactive polymer layer in the first bending section is evenly distributed around the circumference of the sheath body and extends along the axial direction of the sheath body; the electroactive polymer layer in the second bending section is concentrically arranged around the sheath body; a control handle is provided at the proximal end of the sheath body, and several flexible wires are provided inside the sheath body wall, the electroactive polymer layers are electrically connected to the drive module of the control handle through the flexible wires, the drive module applies voltage to control the electroactive polymer layer to deform under the current, thereby controlling the bending of the first bending section and the second bending section.

[0008] The controllable head of this invention includes a first bending section and a second bending section. The first and second bending sections utilize an electroactive polymer (EAP), a smart material with unique electrical and mechanical properties. This polymer deforms upon electrical stimulation, thereby driving the sheath to bend. The electroactive polymer layer in the first bending section is evenly distributed around the circumference of the sheath body and extends along the axial direction of the sheath body to achieve small-amplitude bending. The electroactive polymer layer in the second bending section is concentrically arranged around the sheath body to achieve larger-amplitude bending. This segmented adjustment method allows for more precise control of the controllable head's position. The structure is simple and reasonable, and operation is convenient. Due to the support provided by the sheath itself, there is no need to install a shaping steel wire inside the electrode, thereby effectively reducing the risk of the electrode being pulled back into the atrium when the steel wire is withdrawn.

[0009] Preferably, the first bending section has a first electroactive polymer layer and a second electroactive polymer layer embedded in its tube wall. The first and second electroactive polymer layers are evenly distributed around the circumference of the sheath body. The first and second electroactive polymer layers are disposed close to the inner wall of the sheath body and are arranged perpendicularly to each other. The first bending section bends to form a first plane, and the second bending section bends to form a second plane. The first plane and the second plane intersect.

[0010] This invention uses a drive module to send an electrical signal to the first or second electroactive polymer layer, causing it to deform and thus drive the first or second bending segment to bend. The first plane intersects with the second plane, enabling the sheath body to flexibly turn within the blood vessel.

[0011] Preferably, the first electroactive polymer layer includes a left driving unit and a right driving unit. The left driving unit extends axially along the left side wall of the sheath body, and the right driving unit extends axially along the right side wall of the sheath body. The left driving unit and the right driving unit are electrically connected to the driving module of the control handle through flexible wires. The driving module applies voltage to the left driving unit or the right driving unit, causing the left driving unit or the right driving unit to deform and drive the first bending section to bend.

[0012] This invention uses a drive module to apply voltage to the left or right drive unit, causing the left or right drive unit to deform and drive the first bending segment to bend. For example, the left drive unit is energized and contracts while the right drive unit remains unchanged, causing the first bending segment to bend to the left. Conversely, the right drive unit is energized and contracts while the left drive unit remains unchanged, causing the first bending segment to bend to the right, thus achieving a small-amplitude bend. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the controllable head of this utility model in its working state.

[0015] Figure 3 This is a schematic diagram of the structure of the first electroactive polymer layer, the second electroactive polymer layer and the third electroactive polymer layer of this utility model.

[0016] Figure 4 This is a schematic diagram of the internal structure of the sheath body of this utility model.

[0017] Figure 5 for Figure 4 AA cross-section view.

[0018] Figure 6 for Figure 4 BB cross-section.

[0019] Figure 7 for Figure 4 CC cross-section view.

[0020] In the diagram: 1. Sheath body; 11. Main body section; 2. Controllable head; 3. Guide wire channel; 4. Wire channel; 5. Control handle; 6. Flexible wire; 21. First bending section; 22. Second bending section; 51. Control button; 211. First electroactive polymer layer; 212. Second electroactive polymer layer; 221. Third electroactive polymer layer; 2111. Left drive unit; 2112. Right drive unit; 2121. Upper drive unit; 2122. Lower drive unit; 2211. Slightly curved drive unit. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] See Figure 1-7 The structures, proportions, and sizes illustrated in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art. They are not intended to limit the scope of this invention and therefore lack substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of this invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0023] Example 1: A right ventricular electrode delivery sheath with a controllable head, referenced Figure 1 , Figure 2 , Figure 3The device includes a sheath body 1, with a guidewire channel 3 penetrating through its center. A controllable head 2 is located at the distal end of the sheath body 1. In this embodiment, "proximal" and "distal" are defined based on their distance from the operator (e.g., a doctor), with the end closer to the operator being the proximal end and the end farther from the operator being the distal end. The controllable head 2 includes bending sections, which are sequentially defined as a first bending section 21 and a second bending section 22 from the distal end to the proximal end. Each bending section contains an electroactive polymer layer. The first bending section 21... The electroactive polymer layer inside is evenly distributed around the circumference of the sheath body 1 and extends along the axial direction of the sheath body 1; the electroactive polymer layer in the second bending section 22 is concentrically arranged around the sheath body 1; a control handle 5 is provided at the proximal end of the sheath body 1, and several flexible wires 6 are provided inside the tube wall of the sheath body 1. The electroactive polymer layer is electrically connected to the drive module of the control handle 5 through the flexible wires 6. The drive module applies voltage to control the electroactive polymer layer to deform under the influence of electricity, so as to control the bending of the first bending section 21 and the second bending section 22. The controllable head of this invention includes a first bending section and a second bending section. The first and second bending sections utilize an electroactive polymer (EAP), a smart material with unique electrical and mechanical properties. This polymer deforms upon electrical stimulation, thereby driving the sheath to bend. The electroactive polymer layer in the first bending section is evenly distributed around the circumference of the sheath body and extends along the axial direction of the sheath body to achieve small-amplitude bending. The electroactive polymer layer in the second bending section is concentrically arranged around the sheath body to achieve larger-amplitude bending. Through this segmented adjustment method, the sheath body can be flexibly turned within the blood vessel, enabling more precise control of the controllable head's position. The structure is simple and reasonable, and the operation is convenient. Due to the support provided by the sheath itself, there is no need to install a shaping wire inside the electrode, thereby effectively reducing the risk of the electrode being pulled back into the atrium when the wire is withdrawn.

[0024] Example 2: Based on Example 1, with reference to... Figure 4 The first bending section 21 has a first electroactive polymer layer 211 and a second electroactive polymer layer 212 embedded in its wall. The first and second electroactive polymer layers 211 and 212 are evenly distributed around the circumference of the sheath body 1, and are positioned close to the inner wall of the sheath body 1. The first and second electroactive polymer layers 211 and 212 are arranged perpendicularly to each other. The first bending section 21 bends to form a first plane, and the second bending section 22 bends to form a second plane. The first and second planes intersect. This invention uses a driving module to send electrical signals to the first or second electroactive polymer layer, causing it to deform, thereby bending the first or second bending section. The intersection of the first and second planes enables flexible turning of the sheath body within the blood vessel.

[0025] Example 3: Based on Example 2, a third electroactive polymer layer 221 is embedded in the wall of the second bending section 22, and the third electroactive polymer layer 221 is disposed close to the outer wall of the sheath body 1; the first plane intersects the second plane perpendicularly. This invention, by using the perpendicular intersection of the first and second planes, can form a spiral motion trajectory, further enhancing the maneuverability of the sheath body in complex vascular structures. It solves the technical defect that traditional sheaths often have difficulty precisely controlling the bending direction and degree when the sheath frequently needs to traverse tortuous and variable vascular paths during surgery.

[0026] Example 4: Based on Example 3, with reference to... Figure 6 The first electroactive polymer layer 211 includes a left driving unit 2111 and a right driving unit 2112. The left driving unit 2111 extends axially along the left side wall of the sheath body 1, and the right driving unit 2112 extends axially along the right side wall of the sheath body 1. The left driving unit 2111 and the right driving unit 2112 are electrically connected to the driving module of the control handle 5 via a flexible wire 6. The driving module applies voltage to the left driving unit 2111 or the right driving unit 2112, causing the left driving unit 2111 or the right driving unit 2112 to deform, thereby driving the first bending section 21 to bend. In this invention, the driving module applies voltage to the left driving unit or the right driving unit, causing the left driving unit or the right driving unit to deform, thereby driving the first bending section to bend. For example, the left driving unit contracts when energized, while the right driving unit remains unchanged, causing the first bending section to bend to the left; conversely, the right driving unit contracts when energized, while the left driving unit remains unchanged, causing the first bending section to bend to the right, achieving a small-amplitude bend.

[0027] Example 5: Based on Example 4, the second electroactive polymer layer 212 includes an upper driving unit 2121 and a lower driving unit 2122. The upper driving unit 2121 extends axially along the upper sidewall of the sheath body 1, and the lower driving unit 2122 extends axially along the lower sidewall of the sheath body 1. The upper driving unit 2121 and the lower driving unit 2122 are electrically connected to the driving module of the control handle 5 through a flexible wire 6. The driving module applies voltage to the upper driving unit 2121 or the lower driving unit 2122, causing the upper driving unit 2121 or the lower driving unit 2122 to deform, thereby driving the second bending section 22 to bend. This invention employs a drive module to apply voltage to the upper or lower drive unit, causing the upper or lower drive unit to deform and drive the second bending segment to bend. For example, the upper drive unit contracts when energized, while the lower drive unit remains unchanged, causing the first bending segment to bend upward. Conversely, the lower drive unit contracts when energized, while the upper drive unit remains unchanged, causing the first bending segment to bend downward, thus achieving a small-amplitude bend.

[0028] Example 6: Based on Example 5, with reference to... Figure 5 The third electroactive polymer layer 221 is provided with several inferior arc-shaped driving units 2211, which are located on a circle concentric with the sheath body 1. When the driving module applies voltage to one or more inferior arc-shaped driving units 2211, it drives the second bending section 22 to bend. When the driving module applies voltage to adjacent inferior arc-shaped driving units 2211 in sequence, it drives the sheath body 1 to rotate around its own axis. In this invention, when the driving module applies voltage to one or more inferior arc-shaped driving units, it drives the second bending section to bend. When the driving module applies voltage to adjacent inferior arc-shaped driving units in sequence, these inferior arc-shaped driving units work together to generate a torque around the axis, driving the sheath body to rotate around its own axis, thus achieving a large-amplitude bending.

[0029] Example 7: Based on Example 6, the sheath body 1 has several wire channels 4 inside its tube wall for the flexible wires 6 to pass through. The number of wire channels 4 is equal to the sum of the upper drive unit 2121, lower drive unit 2122, left drive unit 2111, right drive unit 2112, and several inferior arc drive units 2211. The control handle 5 has several control buttons 51 electrically connected to the control module, and the number of control buttons 51 is equal to the number of wire channels 4. This utility model uses flexible wires to connect the upper drive unit, lower drive unit, left drive unit, right drive unit, and several different inferior arc drive units. By operating different control buttons, the user can independently control and adjust each drive unit.

[0030] Example 8: Based on Example 7, there are 4 inferior arc drive units 2211. Each inferior arc drive unit 2211 can be independently controlled to achieve bending and rotation of the sheath body 1 in different directions and angles. Of course, in other embodiments, the number of inferior arc drive units 2211 can be 6 or 8 to achieve more precise control.

[0031] Example 9: Based on Example 7, with reference to... Figure 7 The sheath body 1 has several spaced wire channels 4 on its cross-section. The wire channels 4 are all located on the side length of a rectangle and are arranged along the length of the sheath body 1. Each flexible wire 6 passes through its corresponding wire channel 4.

[0032] Example 10: Based on Example 7, the driving module includes a driving power supply, a first control circuit for controlling the operation of the first electroactive polymer layer 211, a second control circuit for controlling the operation of the second electroactive polymer layer 212, and a third control circuit for controlling the operation of the third electroactive polymer layer 221. The driving power supply is fixed inside the handle, and the first, second, and third control circuits are all electrically connected to the driving power supply and the flexible wire 6.

[0033] Example 11: Based on Example 1, the sheath body 1 further includes a main body segment 11 connected to the controllable head 2, wherein the hardness of the controllable head 2 is less than that of the main body segment 11. This invention utilizes a controllable head with a lower hardness than the main body segment, allowing the controllable head to bend flexibly within the right ventricular cavity, reducing damage to cardiac tissue.

[0034] In practice, the clinical procedure for implanting a right ventricular electrode via the cephalic vein / subclavian vein / axillary vein is as follows: The cephalic vein / subclavian vein / axillary vein is punctured, and a guidewire is inserted into the right atrium along the vein. A right ventricular electrode delivery sheath with a controllable tip is then advanced into the right atrium along the guidewire. The guidewire is then withdrawn. By adjusting the curvature of the second bending segment 22, the sheath body 1 passes through the tricuspid valve annulus and enters the right ventricle, allowing the electrode to pass through the tricuspid valve annulus more easily. The approximate position of the controllable tip 2 within the right ventricle is then adjusted using the second bending segment 22, combined with the adjustment of the first bending segment 21, to more precisely adjust the position of the controllable tip 2 within the right ventricle. After the position is adjusted... The electrode is inserted along the sheath body 1 to achieve precise positioning of the electrode. Due to the support provided by the main body 11 of the sheath, there is no need to install a shaping wire inside the electrode, which effectively reduces the risk of the electrode being pulled back into the atrium when the wire is withdrawn. In addition, this design also reduces the need for repeated withdrawal and shaping of the wire due to the different sizes of patients' hearts. This not only significantly shortens the operation time, but also reduces the risk of complications such as bleeding, infection and guide wire breakage. It solves the technical defect that the electrode is usually a soft and hollow structure, so it is necessary to use a guide wire or steel wire for support and shaping during delivery to ensure that the electrode can reach the target position smoothly.

[0035] The above-described embodiments are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A right ventricular electrode delivery sheath with a controllable head, comprising a sheath body (1), wherein a guidewire channel (3) is provided through the center of the sheath body (1), characterized in that: The distal end of the sheath body (1) is provided with a controllable head (2), which includes a bending section. The bending sections are arranged from far to near as a first bending section (21) and a second bending section (22). Each bending section is provided with an electroactive polymer layer. The electroactive polymer layer in the first bending section (21) is evenly distributed around the circumference of the sheath body (1) and extends along the axial direction of the sheath body (1). The electroactive polymer layer in the second bending section (22) is arranged concentrically around the sheath body (1). The proximal end of the sheath body (1) is provided with a control handle (5). Several flexible wires (6) are provided inside the tube wall of the sheath body (1). The electroactive polymer layers are electrically connected to the drive module of the control handle (5) through the flexible wires (6). The drive module applies voltage to control the electroactive polymer layer to deform under the influence of electricity, so as to control the bending of the first bending section (21) and the second bending section (22).

2. The right ventricular electrode delivery sheath with a controllable head according to claim 1, characterized in that: The first bending section (21) has a first electroactive polymer layer (211) and a second electroactive polymer layer (212) embedded in its tube wall. The first electroactive polymer layer (211) and the second electroactive polymer layer (212) are evenly distributed around the circumference of the sheath body (1). The first electroactive polymer layer (211) and the second electroactive polymer layer (212) are located close to the inner wall of the sheath body (1). The first electroactive polymer layer (211) and the second electroactive polymer layer (212) are arranged perpendicularly. The first bending section (21) bends to form a first plane, and the second bending section (22) bends to form a second plane. The first plane and the second plane intersect.

3. A right ventricular electrode delivery sheath with a controllable head according to claim 2, characterized in that: The second bending section (22) has a third electroactive polymer layer (221) embedded in its tube wall. The third electroactive polymer layer (221) is located close to the outer wall of the sheath body (1). The first plane intersects the second plane perpendicularly.

4. A right ventricular electrode delivery sheath with a controllable head according to claim 3, characterized in that: The first electroactive polymer layer (211) includes a left drive unit (2111) and a right drive unit (2112). The left drive unit (2111) extends axially along the left side wall of the sheath body (1), and the right drive unit (2112) extends axially along the right side wall of the sheath body (1). The left drive unit (2111) and the right drive unit (2112) are electrically connected to the drive module of the control handle (5) through a flexible wire (6). The drive module applies voltage to the left drive unit (2111) or the right drive unit (2112) to cause the left drive unit (2111) or the right drive unit (2112) to deform, thereby driving the first bending section (21) to bend.

5. A right ventricular electrode delivery sheath with a controllable head according to claim 4, characterized in that: The second electroactive polymer layer (212) includes an upper driving unit (2121) and a lower driving unit (2122). The upper driving unit (2121) extends axially along the upper side wall of the sheath body (1), and the lower driving unit (2122) extends axially along the lower side wall of the sheath body (1). The upper driving unit (2121) and the lower driving unit (2122) are electrically connected to the driving module of the control handle (5) through a flexible wire (6). The driving module applies voltage to the upper driving unit (2121) or the lower driving unit (2122) to cause the upper driving unit (2121) or the lower driving unit (2122) to deform, thereby driving the second bending section (22) to bend.

6. A right ventricular electrode delivery sheath with a controllable head according to claim 5, characterized in that: The third electroactive polymer layer (221) is provided with several inferior arc-shaped driving units (2211). The inferior arc-shaped driving units (2211) are located on a circle concentric with the sheath body (1). When the driving module applies voltage to one or more inferior arc-shaped driving units (2211), it drives the second bending section (22) to bend. When the driving module applies voltage to adjacent inferior arc-shaped driving units (2211) in sequence, it drives the sheath body (1) to rotate around its own axis.

7. A right ventricular electrode delivery sheath with a controllable head according to claim 6, characterized in that: The sheath body (1) has several wire channels (4) inside its tube wall for the flexible wire (6) to pass through; the number of wire channels (4) is equal to the sum of the upper drive unit (2121), the lower drive unit (2122), the left drive unit (2111), the right drive unit (2112) and several inferior arc drive units (2211); the control handle (5) has several control buttons (51) electrically connected to the control module, and the number of control buttons (51) is equal to the number of wire channels (4).

8. A right ventricular electrode delivery sheath with a controllable head according to claim 7, characterized in that: The sheath body (1) has several wire channels (4) arranged at intervals on its cross-section. The wire channels (4) are all located on the side length of the rectangle and are arranged along the length of the sheath body (1). Each flexible wire (6) passes through the corresponding wire channel (4).

9. A right ventricular electrode delivery sheath with a controllable head according to claim 7, characterized in that: The drive module includes a drive power supply, a first control circuit for controlling the operation of the first electroactive polymer layer (211), a second control circuit for controlling the operation of the second electroactive polymer layer (212), and a third control circuit for controlling the operation of the third electroactive polymer layer (221). The drive power supply is fixed inside the handle. The first control circuit, the second control circuit, and the third control circuit are all electrically connected to the drive power supply and the flexible wire (6).

10. A right ventricular electrode delivery sheath with a controllable head according to claim 1, characterized in that: The sheath body (1) also includes a main body section (11) connected to the controllable head (2), and the hardness of the controllable head (2) is less than that of the main body section (11).

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