Catheter sealing device for transcardiac apex first aid

Abstract

The utility model discloses a catheter sealing device for transcardiac apex first aid. The catheter sealing device comprises a telescopic disc made of a shape memory alloy material and a spiral push rod used for achieving state change of the telescopic disc. The telescopic disc is provided with anchoring claws and developing rings distributed in the circumferential direction. The telescopic disc has an unfolded state and a closed state, and the telescopic disc is pre-shaped into a shape in the closed state; in the unfolded state, the telescopic disc is in a hexagonal plum blossom shape, in the closed state, the telescopic disc is provided with an inwards-concave triangle and an outwards-protruding triangle, each corner is in threaded connection with a spiral push rod, and the inwards-concave triangles can be unfolded under the pulling action of the spiral push rods, so that the telescopic disc is converted into the unfolded state from the closed state. The device is simple in structure, easy and convenient to operate and capable of rapidly opening and closing a cardiac apex channel, sealing a catheter and reducing bleeding when being used for transapical cardiac apex first aid.

Description

Technical Field

[0001] This utility model relates to a catheter sealing device for transapical emergency care, belonging to the field of medical device technology. Background Technology

[0002] Cardiogenic shock is a serious medical emergency. Once acute shock occurs, the patient's hemodynamics become unstable, requiring revascularization such as mechanical circulatory support. However, existing circulatory devices can only be used in hospital catheterization labs, meaning patients often miss the golden window for rescue. There is an urgent need for a mechanical circulatory support device that can be used at the emergency scene or in an ambulance. Therefore, transapical left ventricular catheterization pumps have become a new research direction. The transapical approach is very suitable for emergency scenarios because it does not require open-chest surgery, has a short and direct route, and can significantly reduce risks.

[0003] However, current transapical procedures, including valve replacement and repair, all require the creation of an apical purse-string suture. This purse-string suture is complex and requires specialized surgeons, making it unsuitable for emergency situations. Therefore, it is necessary to develop a transapical catheter-sealed device for emergency use. This device, used in conjunction with a catheter pump, would facilitate rapid apical intervention and sealing in emergency situations, minimizing blood loss. Summary of the Invention

[0004] The purpose of this invention is to provide a catheter sealing device for transapical emergency care, mainly used to quickly open and close the apical passage, seal the catheter, and reduce bleeding during transapical emergency care.

[0005] To achieve the above objectives, this utility model provides a catheter closure device for apical emergency use, comprising a telescopic disc made of shape memory alloy and a helical push rod for changing the state of the telescopic disc. The telescopic disc is provided with anchoring claws and circumferentially distributed imaging rings. The telescopic disc has an open and a closed state, and the telescopic disc is pre-shaped in the closed state. In the open state, the telescopic disc is hexagonal quincunx-shaped. In the closed state, the telescopic disc has concave triangles and convex triangles, and a helical push rod is threaded to each corner. The concave triangles can be unfolded under the pulling action of the helical push rod, so that the telescopic disc changes from the closed state to the open state (hexagonal quincunx shape).

[0006] Preferably, the anchoring claw includes an anchoring claw body with a conical tip and barbs symmetrically distributed on both sides of the anchoring claw body, wherein the angle between the barbs and the anchoring claw body is an acute angle.

[0007] Preferably, the included angle is an acute angle ≤30°.

[0008] Preferably, the anchoring claws are symmetrically distributed along the circumference of the telescopic disc, and the number is 2 to 6.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0010] (1) This utility model can be used in emergency situations to open the apical channel and insert a catheter pump by setting a threaded push rod deployment device, and then quickly close the apical channel and seal the catheter by removing the spiral push rod to reduce bleeding.

[0011] (2) This utility model has a simple structure, low manufacturing cost, and is easy to operate. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the catheter sealing device of this utility model in the open state;

[0013] Figure 2 This is a schematic diagram of the catheter sealing device of this utility model in the closed state;

[0014] Figure 3 This is a schematic diagram of a partial structure of the anchor claw;

[0015] Figure 4 A schematic diagram illustrating the principle of two-state transition of a catheter sealing device;

[0016] Figure 5 A schematic diagram illustrating the establishment of apical access when using a catheter-sealed device;

[0017] Figure 6 This is a schematic diagram of a conduit sealing device used to seal a conduit pump during application.

[0018] Reference numerals: 1. Telescopic disc; 2. Helical push rod; 3. Delivery sheath; 4. Conduit pump; 1.1. Anchor claw; 1.2. Imaging ring; 1.3. Threaded hole; 1.1.1. Conical tip; 1.1.2. Barb. Detailed Implementation

[0019] To make this utility model more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings.

[0020] Example

[0021] A closed catheter device for transapical emergency use, such as Figures 1-2 As shown, it includes a telescopic disc 1 and a helical push rod 2 for realizing the state transformation of the telescopic disc. The telescopic disc 1 is provided with anchoring claws 1.1 and circumferentially distributed developing rings 1.2. The anchoring claws 1.1 are symmetrically distributed along the circumference of the telescopic disc 1, and the number is 2 to 6.

[0022] This catheter sealing device has two states during use: Figure 1 With the device in the open position, the catheter pump passes through it and is inserted into the left ventricle; once the catheter pump reaches its operating position, the closed device switches to... Figure 2 The closed state shown indicates that the catheter is circumferentially clamped to achieve a seal.

[0023] The telescopic disk 1 is made of shape memory alloy material, such as nickel-titanium alloy, and its final shape is as follows: Figure 2 The device is shown in the closed state. In the closed state, it has a stable triangular distribution circumferentially, with concave triangles and convex triangles, which can effectively distribute the force on the apical tissue, ensuring the catheter seal while reducing myocardial tearing. There are 6 spiral push rods 2, which are threaded onto the concave triangles and the convex triangles respectively, and are symmetrically distributed. Under the action of the spiral push rod 2 set on the inner triangle, the concave triangle unfolds, while the spiral push rod set on the outer triangle remains stationary to maintain the position of the device and prevent its displacement. The device changes to the open state, and the telescopic disc is hexagonal quincunx-shaped.

[0024] Figure 3 This is a partial structural diagram of the anchoring claw 1.1. The anchoring claw 1.1 includes an anchoring claw body with a conical tip 1.1.1 and barbs 1.1.2 symmetrically distributed on both sides of the anchoring claw body. The conical tip 1.1.1 can easily insert into the myocardial tissue, while the barbs 1.1.2 can effectively hook the myocardial tissue to ensure that the apical catheter sealing device is anchored at the apex of the heart and does not fall off. Furthermore, the barbs 1.1.2 form an acute angle with the anchoring claw 1.1 body, with an angle ≤30°, and the barb length is 1-3 mm. The overall height of the anchoring claw 1.1 is approximately 5-7 mm, so that the anchoring claw 1.1 is located within the myocardium at the apex of the heart and does not extend beyond the myocardium into the ventricular cavity.

[0025] Combination Figures 1-3 As shown, the telescopic disc 1 has six threaded holes 1.3 distributed around its circumference for connecting with the helical push rod 2.

[0026] Figure 4This diagram illustrates the principle of the two-state transition of the catheter closure device. The left diagram shows the closed state. After the threaded hole 1.3 and the helical push rod 2 are connected, the three outer push rods 2 remain stationary, while the three inner push rods 2 expand the telescopic disc 1 outwards along the center direction to the open state shown in the right diagram. After the catheter pump reaches the implantation position, the threads are unscrewed to unlock the six helical push rods 2. Thanks to the shape memory performance, the catheter closure device returns to the closed state, forming a seal. Specifically, when the apical catheter closure device is in the closed state, a closed circle D0 is formed on its inner side, with a diameter of 4-7 mm. When it is in the open state, an interventional lumen circle D1 is formed, with a diameter of 9-12 mm, and an external fixed circular cavity D2 is formed, with a diameter of 10-14 mm.

[0027] Figures 5-6 This is a schematic diagram illustrating the application of this utility model. A delivery sheath 3, pre-loaded with a catheter closure device, is inserted through a small incision in the chest. Under the guidance of portable CT and ultrasound, a suitable apical anchoring point is located via the contrast-enhancing ring 1.2. The closure device is then opened and inserted into the myocardium, forming a catheter pump intervention channel. The catheter pump 4 is then implanted to the appropriate position. Figure 5 As shown; then unscrew and remove the screw push rod 2, the sealing device returns to the closed state, and the sealed guide pump, as shown. Figure 6 As shown.

[0028] The above-described embodiments are merely preferred embodiments of this utility model and are not intended to limit this utility model in any form or substance. It should be noted that those skilled in the art can make several improvements and additions without departing from this utility model, and these improvements and additions should also be considered within the scope of protection of this utility model.

Claims

1. A closed catheter device for transapical emergency care, characterized in that, It includes a telescopic disk made of shape memory alloy material and a helical push rod for realizing the state change of the telescopic disk. The telescopic disk is provided with anchoring claws and circumferentially distributed developing rings. The telescopic disc has an unfolded and a closed state, and the telescopic disc is pre-shaped to be in the closed state. In the unfolded state, the telescopic disc is hexagonal and quincunx-shaped. In the closed state, the telescopic disc has a concave triangle and an outward convex triangle. Each corner is threaded with a spiral push rod. The concave triangle can unfold under the pulling action of the spiral push rod, so that the telescopic disc changes from the closed state to the unfolded state. The anchoring claws are symmetrically distributed around the telescopic disc, and the number is 2 to 6. The anchoring claw includes an anchoring claw body with a conical tip and barbs symmetrically distributed on both sides of the anchoring claw body.

2. The catheter sealing device as described in claim 1, characterized in that, The angle between the barb and the anchoring claw body is an acute angle.

3. The catheter sealing device as described in claim 2, characterized in that, The included angle is an acute angle ≤30°.

Images