A stent placement device for cardiac surgery

Abstract

This application provides a stent placement device for cardiac surgery, comprising a cannula with an inlet end and an outlet end; the cannula is divided into 2-3 cannula branches at the inlet end; the cannula accommodates 2-3 stent delivery catheters; one stent delivery catheter is inserted from each cannula branch; all stent delivery catheters exit from the cannula outlet end; each stent delivery catheter has a guidewire lumen and a stent balloon pressure chamber; a guidewire is disposed in the guidewire lumen; a stent implanter is disposed at the tip of the stent delivery catheter, and an ultrasound positioning ball is sequentially disposed at the tip of the stent delivery catheter. This application utilizes a structure consisting of a flexible cannula and multiple stent delivery catheters to conveniently and simultaneously provide precise stent implantation for multiple blood vessels; by incorporating an ultrasound positioning ball with a corner reflector to enhance ultrasound reflection, the implantation and detailed operation of the device can be more easily completed under ultrasound monitoring.

Description

Technical fields:

[0001] This application belongs to the field of medical devices, particularly stent implantation devices. Specifically, this application provides a stent placement device for use in cardiac surgery. Background Technology

[0002] Vascular stenosis and occlusion are common cardiovascular diseases that can easily lead to disability or even death. Endovascular stenting is one of the main treatments for these diseases.

[0003] Vascular stenosis and occlusion often occur simultaneously in multiple brachiocephalic vessels, and multiple sites may occur in each vessel. When the lesions are severe, patients often need to have multiple stents implanted in a single cardiac surgery. Currently, the treatment of such cases generally requires intervention through the femoral artery, involving multiple guidewire interventions, dilation, implantation, and guidewire withdrawal processes to implant multiple stents, which greatly prolongs the operation time and increases the surgical risks. The stent implantation process is often performed under angiography, and both the use of contrast agents and the irradiation process itself are detrimental to the patient's health and the convenience of the operation.

[0004] Research on stent implantation devices in this field generally focuses on the structure of the device itself. For example, the invention points of CN107440822A and CN212186774U lie in the positioning structure of the stent release device. While CN206424184U provides a stent release system for branch vessels, its invention point is to solve the difficulty of stent placement at branch vessels, without considering the simultaneous placement of multiple stents during cardiac surgery. In other words, the prior art does not disclose the simultaneous implantation of stent devices into multiple cardiovascular vessels during cardiac surgery, and the positioning methods and effectiveness during stent implantation are also relatively limited.

[0005] In view of the above-mentioned shortcomings of the existing technology, this invention application is hereby filed. Summary of the Invention

[0006] The objective of this invention is to provide a stent placement device for cardiac surgery. To achieve this objective, the technical solution provided by this invention is as follows:

[0007] A stent placement device for cardiac surgery is provided, comprising a cannula having an inlet end and an outlet end; the cannula is divided into 2-3 cannula branches at the inlet end; the cannula accommodates 2-3 stent delivery catheters; one of the stent delivery catheters is introduced from each cannula branch; all stent delivery catheters exit at the cannula outlet end; each stent delivery catheter has a guidewire lumen and a stent balloon pressure chamber; a guidewire is disposed in the guidewire lumen; and a stent implanter is disposed at the tip of the stent delivery catheter.

[0008] The sleeve is a hollow pipe, and the 2-3 support delivery conduits are housed in the hollow pipe; or the sleeve is a solid pipe with 2-3 channels, each branch of the sleeve has one channel, and each channel houses one support delivery conduit.

[0009] The sleeve is provided with a sleeve bending section, which is a retractable and steerable structure formed by stacking the outer walls of the sleeve.

[0010] The end of the sleeve branch is equipped with a one-way valve.

[0011] The cannula is 10-100cm long and 5-20mm in diameter; the guidewire is 0.1-0.5mm in diameter; and the stent delivery conduit is 2-10mm in diameter.

[0012] The stent implanter includes a stent in a folded state and a stent balloon placed inside the stent.

[0013] The guidewire and the support are connected by one or more limiting beams in the support, so that the support advances synchronously when the guidewire moves forward, and the support remains in its original position when the guidewire twists and exits.

[0014] The stent balloon is connected to the stent balloon pressure chamber, and when the stent is released, liquid or gas is injected into the stent balloon through the stent balloon pressure chamber.

[0015] The stent delivery catheter is provided with a head cone and a spring head coil in sequence at the front end, and one or more metal ultrasonic positioning balls are located between the head cone and the stent delivery catheter.

[0016] The ultrasonic positioning ball is provided with one or more corner reflectors for enhancing ultrasonic wave reflection signals. The corner reflector is a recess formed by three planes intersecting perpendicularly in pairs.

[0017] The bracket placement device also includes an ultrasonic transmitter, an ultrasonic signal receiver, a signal processing device, and a display device.

[0018] The support placement device also includes a guide wire torsion device.

[0019] The stent placement device also includes a pre-inflatable balloon.

[0020] The bracket placement device also includes a filter placement device.

[0021] The stents, balloons, pre-expanded balloon devices, and filter placement devices in this application can be of types known in the art, and various known platings and coatings can be used on them to optimize implantation results. During operation, those skilled in the art can flexibly select and introduce these devices through cannulas according to the patient's condition.

[0022] The ultrasonic transmitter, ultrasonic signal receiver, signal processing device, and display device in this application can be integrated into the same system / device as the remote filter brain protection device, and can be implemented using the ultrasonic transmitter, ultrasonic signal receiver, signal processing device, and display device in other existing ultrasonic positioning systems.

[0023] The ultrasonic positioning ball in this application is approximately equal to the diameter of the stent delivery catheter, and preferably has at least three corner reflectors, with multiple corner reflectors evenly distributed on the reflector ball.

[0024] The length, diameter, and position of the turning part of the cannula in this application are designed based on the general size of the heart and adjacent blood vessels. It can also be customized before surgery according to the special needs of children, people with vascular malformations, etc.

[0025] The beneficial effects of this invention are:

[0026] (1) The structure of this application, consisting of a flexible cannula and multiple stent delivery catheters, can conveniently and simultaneously provide precise stent implantation for multiple blood vessels, especially two carotid arteries, in cardiac surgery. Its work efficiency and ease of operation are superior to existing devices.

[0027] (2) The device of this application enhances the ultrasonic reflection effect by setting multiple ultrasonic positioning balls with corner reflectors, so that the implantation and detailed operation of the device can be completed more conveniently under ultrasonic monitoring. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the stent implanter of the present invention;

[0030] Figure 3 This is a schematic diagram of the ultrasonic positioning ball of the present invention.

[0031] In the attached diagram: 1 is guidewire, 2 is stent, 3 is limiting beam, 4 is stent balloon, 5-1 is guidewire lumen, 5-2 is stent balloon pressure chamber, 6 is ultrasound positioning ball, 7 is corner reflector, 8 is head cone, 9 is spring head coil, 10 is stent delivery catheter, 11 is cannula, 11-1 is cannula bend, 11-2 is cannula branch, 12 is one-way valve, 13 is stent implanter, 14 is pressure delivery device, 15 is guidewire torsion device, 16 is ultrasound transmitter head, 17 is ultrasound signal receiver, 18 is signal processing device and display device, 19 is pre-dilatation balloon device, and 20 is filter placement device. Detailed Implementation

[0032] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0033] Example 1

[0034] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 2 This is a schematic diagram of the umbrella-shaped filter device of the present invention. Figure 3 This is a schematic diagram of the structure of the ultrasonic positioning ball of the present invention, as shown below. Figure 1 , 2 As shown in Figure 3, a distal filter brain protection device for cardiac surgery according to the present invention includes:

[0035] A cannula 11 has an inlet end and an outlet end; the cannula 11 is divided into 2-3 cannula branches 11-2 at the inlet end; the cannula 11 accommodates 2-3 stent delivery catheters 10; one stent delivery catheter 10 is introduced from each cannula branch 11-2; all stent delivery catheters 10 exit at the cannula outlet end; each stent delivery catheter 10 has a guidewire lumen 5-1 and a stent balloon pressure chamber 5-2; a guidewire 1 is disposed in the guidewire lumen 5-1; a stent implanter 13 is disposed at the tip of the stent delivery catheter 10.

[0036] The sleeve 11 is a hollow pipe, and the 2-3 support delivery conduits 10 are accommodated in the hollow pipe; or the sleeve 11 is a solid pipe with 2-3 channels, each sleeve branch 11-2 has one channel, and each channel accommodates one support delivery conduit.

[0037] The sleeve 11 is provided with a sleeve bending portion 11-1, which is a retractable and steerable structure formed by stacking the outer wall of the sleeve; so that the operating position can be flexibly changed when operating the support delivery conduit or other pre-expansion balloon device or filter placement device.

[0038] The end of the cannula branch is equipped with a one-way valve 12 to provide fixation for the stent delivery conduit or other pre-expanded balloon device or filter placement device during operation.

[0039] The sleeve 11 has a length of 10-100cm and a diameter of 5-20mm; the guide wire has a diameter of 0.1-0.5mm; and the stent delivery conduit has a diameter of 2-10mm.

[0040] The length of the cannula 11 is suitable for intervention in the heart through the ascending aorta, and by appropriate deflection of the cannula bend 11-1, two stent delivery catheters 10 are respectively inserted into the left and right carotid arteries to release stents at appropriate portions in the left and right carotid arteries.

[0041] The stent implanter 13 includes a stent 2 in a folded state and a stent balloon 4 placed inside the stent.

[0042] The guide wire 1 and the support 2 are connected by one or more limiting beams 3 in the support, so that the support 2 advances synchronously when the guide wire 1 moves forward, and the support 2 remains in the original position when the guide wire 1 twists and exits.

[0043] The stent balloon 4 is connected to the stent balloon pressure chamber 5-2. When the stent is released, liquid or gas is injected into the stent balloon through the stent balloon pressure chamber.

[0044] The stent delivery catheter 10 is sequentially equipped with a head cone 8 and a spring head coil 9 at its front end, and one or more metal ultrasonic positioning balls 6 are located between the head cone 8 and the stent delivery catheter 10. During stent implantation, after the stent implanter 13 is pushed to the appropriate position with the assistance of ultrasound, X-ray, or other methods, gas or liquid is introduced into the stent balloon pressure chamber 5-2 using a pressure delivery device 14 to inflate the stent balloon 4, thereby unfolding the stent 2 in its folded state. After the stent is fully deployed, the stent balloon 4 is depressurized, and the guidewire 1 and stent balloon 4 are twisted out, and the stent is placed in its original position.

[0045] The stent delivery catheter is provided with a head cone 8 and a spring head coil 9 at its front end to protect the blood vessel during device advancement. One or more metal ultrasound positioning balls 6 are located between the head cone 8 and the stent delivery catheter 10 (only one is shown in the attached figure).

[0046] The ultrasonic positioning ball 6 is provided with one or more corner reflectors 7 for enhancing ultrasonic wave reflection signals. The corner reflector 7 is a recess formed by three planes intersecting perpendicularly in pairs.

[0047] The bracket placement device also includes an ultrasonic transmitter 16, an ultrasonic signal receiver 17, a signal processing device, and a display device 18.

[0048] The support placement device also includes a guide wire torsion device 15.

[0049] The stent placement device also includes a pre-expanded balloon 19.

[0050] The bracket placement device also includes a filter placement device 20.

[0051] The described embodiments are only some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

Claims

1. A stent placement device for use in cardiac surgery, characterized in that, It includes a cannula with an inlet end and an outlet end; the cannula is divided into 2-3 cannula branches at the inlet end; the cannula accommodates 2-3 stent delivery catheters; one stent delivery catheter is introduced from each cannula branch; all stent delivery catheters exit at the cannula outlet end; each stent delivery catheter has a guidewire lumen and a stent balloon pressure chamber; a guidewire is disposed in the guidewire lumen; The stent delivery catheter is equipped with a stent implanter at its tip; The sleeve is a hollow pipe, and the 2-3 support delivery conduits are housed in the hollow pipe; or the sleeve is a solid pipe with 2-3 channels, each branch of the sleeve has one channel, and each channel houses one support delivery conduit. The sleeve is provided with a sleeve bending section, which is a retractable and steerable structure formed by stacking the outer walls of the sleeve. The stent implanter includes a stent in a folded-down state and a stent balloon placed inside the stent; The stent delivery conduit is provided with a head cone and a spring head coil in sequence at the front end, and one or more metal ultrasonic positioning balls are provided between the head cone and the stent delivery conduit.

2. The bracket placement device according to claim 1, wherein a one-way valve is installed at the end of the sleeve branch.

3. The stent placement device according to claim 1, wherein the sleeve has a length of 10-100cm and a diameter of 5-20mm; the guide wire has a diameter of 0.1-0.5mm; and the stent delivery conduit has a diameter of 2-10mm.

4. The support placement device according to claim 1, wherein the guide wire and the support are detachably connected via one or more limiting beams in the support.

5. The stent placement device according to claim 4, wherein the stent balloon is connected to the stent balloon pressure chamber.

6. The support placement device according to claim 1, wherein one or more corner reflectors for enhancing ultrasonic wave reflection signals are provided on the ultrasonic positioning ball, and the corner reflectors are recesses formed by three planes intersecting perpendicularly in pairs.

7. The support placement device according to claim 1, wherein the support placement device further comprises an ultrasonic transmitter, an ultrasonic signal receiver, a signal processing device, and a display device.

8. The stent placement device according to claim 1, wherein the stent placement device further comprises a guide wire torsion device.

9. The stent placement device according to claim 1, wherein the stent placement device further comprises a pre-dilated balloon.

10. The bracket placement device according to claim 1, wherein the bracket placement device further comprises a filter placement device.

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