A medical semi-open blocking device

Abstract

The present invention relates to the field of medical devices, and specifically discloses a medical semi-open blocking device, comprising a shell, wherein a stent channel for a stent to pass through, a pressure chamber for accommodating a fluid, and an elastic film for separating the stent channel from the pressure chamber are provided in the shell, and a flow port connected to the pressure chamber for fluid to enter and exit is provided on the shell; after the pressure chamber is filled with fluid, the elastic film is urged to expand toward the stent channel and block the stent channel. The present invention enables surgery to be completed without deep hypothermic circulatory arrest in the case of antegrade stent placement, thereby reducing postoperative complications and improving surgical effects.

Description

Technical Field

[0001] The invention relates to the field of medical devices, and in particular to a medical semi-open blocking device. Background Art

[0002] The aortic arch replacement plus stent elephant trunk surgery is widely used in the treatment of thoracic aortic aneurysms and acute and chronic type A aortic dissection. Its short-, medium- and long-term surgical efficacy has been recognized by more and more experts at home and abroad. Whether it is retrograde stent placement or antegrade stent placement, the implementation of this operation must use deep hypothermic circulatory arrest technology, that is, the whole body needs to be cooled during the operation. When the nasopharyngeal temperature drops to 18-20℃, unilateral selective cerebral perfusion is performed through axillary artery or innominate artery cannulation. At this time, the lower body circulatory arrest, that is, the organs perfused by the descending aorta, including spinal cord, liver, kidney, digestive tract, etc., have no blood perfusion. After the stent blood vessel is implanted in the true lumen of the descending aorta, the "open anastomosis technology" is used to complete the anastomosis of the proximal and distal ends of the descending aorta arch, and then the perfusion of the lower body is restored, and the circulatory arrest ends. The time is generally controlled at about 20-30 minutes. However, deep hypothermic circulatory arrest is likely to cause a series of unavoidable problems such as internal environment disturbance, coagulation damage, acute liver and kidney dysfunction, gastrointestinal dysfunction, spinal cord injury, etc., leading to poor postoperative recovery, serious complications and even death. Therefore, how to shorten the time of deep hypothermic circulatory arrest has important clinical application value.

[0003] In the case of antegrade stent placement, deep hypothermic circulatory arrest is required because blood cannot flow through the artificial blood vessel (four-branch artificial blood vessel or three-branch artificial blood vessel, the same below) when the stent is implanted into the descending aorta.

[0004] This technical problem needs to be solved urgently. Summary of the invention

[0005] In view of this, an object of the present invention is to provide a medical semi-open blocking device, which enables surgery to be completed without deep hypothermic circulatory arrest when a stent is placed antegradely, thereby reducing postoperative complications and improving surgical results.

[0006] The present invention provides a medical semi-open blocking device, comprising a shell, wherein the shell is provided with a stent channel for allowing a stent to pass through, a pressure chamber for accommodating a fluid, and an elastic film for separating the stent channel from the pressure chamber, and the shell is provided with a flow port connected to the pressure chamber for allowing the fluid to enter and exit; when the pressure chamber is filled with fluid, the elastic film is caused to expand toward the stent channel and block the stent channel.

[0007] As a further improvement to the above technical solution, the shell is a rotating body structure, the support channel is arranged along the axial direction of the shell and forms a left end opening and a right end opening, and the right end opening is used to connect to the artificial blood vessel.

[0008] As a further improvement to the above technical solution, the elastic film is arranged along the radial direction of the shell and takes the axis of the shell as the axis of symmetry.

[0009] As a further improvement of the above technical solution, the medical semi-open blocking device also includes a guide cylinder I with a guide channel I therein, the guide cylinder I coaxially extends from the left end opening of the shell into the bracket channel and is fixedly connected, and the guide channel I is arranged along the axial direction of the guide cylinder and is connected to the bracket channel.

[0010] As a further improvement to the above technical solution, the guide cylinder I is connected to the housing via a threaded pair or in an interference fit manner.

[0011] As a further improvement of the above technical solution, the medical semi-open blocking device also includes a guide cylinder II with a guide channel II therein, the guide cylinder II coaxially extends from the right end opening of the shell into the bracket channel and is fixedly connected, the guide channel II is arranged along the axial direction of the guide cylinder and is connected to the bracket channel; a transition blood vessel is fixedly sleeved outside the guide cylinder II, and the transition blood vessel is used to be sutured with an artificial blood vessel.

[0012] As a further improvement to the above technical solution, the guide cylinder II is connected to the shell through a threaded pair.

[0013] As a further improvement to the above technical solution, the medical semi-open blocking device also includes a pressure increasing and reducing device, which is connected to the flow port through a connecting tube and is used to fill or extract fluid from the pressure chamber.

[0014] As a further improvement to the above technical solution, the pressure increasing and decreasing device is a syringe structure.

[0015] As a further improvement of the above technical solution, a connecting valve is provided between the connecting pipe and the pressure increasing and reducing device, one end of the connecting valve is connected to the connecting pipe, and the other end is connected to the pressure increasing and reducing device, and the end connected to the pressure increasing and reducing device is connected to a sealing cover, and the sealing cover is tied to the connecting valve by a tether.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects:

[0017] The medical semi-open blocking device provided by the present invention first connects the proximal end of the artificial blood vessel to the shell and communicates with the stent channel to complete the preparation work; during the operation, after the heart stops beating, the right innominate artery is processed, and a blocking clamp is placed between the right innominate artery and the left common carotid artery. At this time, the right innominate artery is supplied with blood, and the left common carotid artery and the left subclavian artery are also supplied with blood through the femoral artery. The position of the blood vessel body and the blocking clamp is anastomosed, and the branch blood vessels of the artificial blood vessel are clamped with clamps respectively. Fluid is filled into the pressure chamber through the flow port. The elastic film gradually expands toward the stent channel under the action of the fluid pressure. When the fluid pressure reaches the set value At this time, the elastic film blocks the stent channel. At this time, the proximal part of the blood vessel main body is in a closed state. Then the clamp is opened, and the circulation is open. Blood flows in the descending aorta. Since the elastic film can be partially opened when the delivery device drives the stent through, the stent is delivered to the descending aorta through the stent channel and implanted to expand the true lumen. After implantation, the delivery device is withdrawn, and the elastic film returns to a fully closed state. At this time, the blood in the blood vessel main body is blocked again and the connection between the blood vessel main body and the semi-open blocking device is disconnected. The operation is completed after the proximal part of the blood vessel main body after trimming is anastomosed with the aortic root. The medical semi-open blocking device can be reused.

[0018] It can be seen that the present application creatively uses a medical semi-open blocking device, so that the operation can be completed without the need for deep hypothermic circulatory arrest when the stent is placed in the antegrade direction, thereby reducing postoperative complications and improving surgical results. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 It is a structural schematic diagram of the housing of the present invention;

[0021] Figure 3 This is a usage state diagram of the present invention. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments; of course, the accompanying drawings are simplified schematic diagrams, and their proportional sizes do not constitute a limitation on the patented product.

[0023] like Figures 1 to 3As shown: This embodiment provides a semi-open blocking device, including a shell 2, wherein the shell 2 is provided with a bracket channel 21 for the bracket to pass through, a pressure chamber 22 for accommodating fluid, and an elastic film 23 for separating the bracket channel 21 from the pressure chamber 22, and the shell 2 is provided with a flow port 24 connected to the pressure chamber 22 for the fluid to enter and exit; after the pressure chamber 22 is filled with fluid, the elastic film 23 is caused to expand toward the bracket channel 21 and block the bracket channel 21.

[0024] Before the operation, the proximal end of the artificial blood vessel 1 needs to be connected to the shell 2 and communicated with the stent channel 21 to complete the preparation work. Here, the artificial blood vessel 1 with a four-branch structure is taken as an example. The artificial blood vessel 1 is provided with four branch blood vessels 11. The first branch blood vessel of the four branch blood vessels 11 is anastomosed with the brachiocephalic artery, the second branch blood vessel is anastomosed with the left internal jugular vein, the third branch blood vessel is anastomosed with the left subclavian artery, and the fourth branch blood vessel is used for perfusion or exhaust. The structure is consistent with the prior art and will not be repeated here. The artificial blood vessel 1 is sealed and connected to the shell 2 to prevent blood leakage.

[0025] The stent is a self-elastic stent structure implanted in the descending aorta to expand the true lumen, which is also consistent with the prior art, and its structure and principle are not described in detail; the stent is delivered by a special delivery device, such as the structure shown in CN2933337Y, or an existing delivery device for interventional treatment.

[0026] In the semi-open blocking device, the elastic film 23 can block the stent channel 21 under the action of fluid pressure (fluid acts on the inner surface of the elastic film 23) to prevent blood from flowing out of the stent channel 21 when the artificial blood vessel 1 is congested; "semi-open" means that due to the elastic effect of the elastic film 23, when its outer surface is subjected to a force greater than the fluid pressure, it can also adaptively deform. At this time, although the elastic film 23 cannot block the stent channel 21, if this conduction can be filled by an object that generates this force, the stent channel 21 will still be in a blocked state (this situation can occur when the conveying device conveys the stent. The outer tube of the conveying stent can cause the elastic film 23 to deform when it is extended and always fits with the outer surface of the elastic film 23 to fill the gap caused by the deformation).

[0027] The elastic film 23 can be made of flexible silicone; the fluid can be gas or liquid, as long as it can cause the elastic film 23 to deform; the shell 2 can be made of hard rubber; the stent channel 21 and the pressure chamber 22 are separated by the elastic film 23, and the two are never connected; the proximal end of the artificial blood vessel 1, that is, the end close to the heart, is Figure 1 The middle is the left end.

[0028] Before the operation, the proximal end of the artificial blood vessel 1 is connected to the housing 2 and communicated with the stent channel 21 to complete the preparation work. During the operation, after the heart stops beating, the right innominate artery is processed, and a blocking clamp is placed between the right innominate artery and the left common carotid artery. At this time, the right innominate artery is supplied with blood, and the left common carotid artery and the left subclavian artery are also supplied with blood through the femoral artery. The position of the artificial blood vessel 1 and the blocking clamp is matched, and the four branch blood vessels 11 are clamped with forceps respectively. Fluid is filled into the pressure chamber 22 through the flow port 24. The elastic film 23 gradually expands toward the stent channel 21 under the action of the fluid pressure. When the fluid pressure reaches the set value, the elastic film 23 blocks the stent channel 21. At this time, the proximal end of the artificial blood vessel 1 The arthroscopic aorta is in a closed state, and then the clamp is opened. At this time, the circulation is opened and blood circulates in the descending aorta. Since the elastic film 23 can be partially opened when the delivery device drives the stent through, the stent is delivered to the descending aorta through the stent channel 21 and implanted to expand the true lumen. After implantation, the delivery device is withdrawn, and the elastic film 23 returns to a fully closed state. At this time, the blood in the artificial blood vessel 1 is blocked again and the connection between the artificial blood vessel 1 and the semi-open blocking device is disconnected. The operation is completed after the proximal part of the artificial blood vessel 1 after trimming is anastomosed with the aortic root, and the medical semi-open blocking device can be reused.

[0029] It can be seen that the present application creatively uses a medical semi-open blocking device, so that the operation can be completed without the need for deep hypothermic circulatory arrest when the stent is placed in the antegrade direction, thereby reducing postoperative complications and improving surgical results.

[0030] In this embodiment, the housing 2 is a rotating body structure, and the bracket channel 21 is arranged along the axial direction of the housing 2 and forms a left end opening and a right end opening ("left" and "right" are represented by Figure 1 , Figure 2 The right end opening is used to connect with the artificial blood vessel 1; the shell 2 can be a cylinder or other suitable structure; the stent channel 21 is straight, which is convenient for the delivery of the stent; at this time, the elastic film 23 is arranged along the radial direction of the shell 2 and takes the axis of the shell 2 as the axis of symmetry, so that the elastic film 23 can be evenly compressed to enhance its sealing effect; the axial ends of the elastic film 23 are fixedly connected to the shell 2, for example, by bonding, integral molding or riveting.

[0031] In this embodiment, the medical semi-open blocking device also includes a guide cylinder Ⅰ3 with a guide channel Ⅰ31 therein, and the guide cylinder Ⅰ3 coaxially extends from the left end opening of the shell 2 into the bracket channel 21 and is fixedly connected, and the guide channel Ⅰ31 is arranged along the axial direction of the guide cylinder and is connected to the bracket channel 21; the guide cylinder Ⅰ3 is conducive to guiding the transportation of the bracket; the guide cylinder Ⅰ3 can be composed of two sections of cylinders, and its longitudinal section is "T" shaped; the guide cylinder Ⅰ3 and the shell 2 can be connected by a threaded pair (located on the wall of the bracket channel 21 and the outer surface of the guide cylinder Ⅰ3) or by an interference fit; the guide cylinder Ⅰ3 can also be used to press the elastic film 23, thereby improving the connection stability of the elastic film 23.

[0032] In this embodiment, the medical semi-open blocking device also includes a guide cylinder II4 with a guide channel II41 therein, the guide cylinder II4 coaxially extends from the right end opening of the shell 2 into the bracket channel 21 and is fixedly connected, the guide channel II41 is arranged along the axial direction of the guide cylinder and is connected to the bracket channel 21; the guide cylinder II4 is also conducive to guiding the delivery of the bracket; but unlike the guide cylinder I3, the guide cylinder II4 is also connected to the artificial blood vessel 1, specifically, the guide cylinder II4 is fixedly sleeved with a transition blood vessel 5, the transition blood vessel 5 is the same as the existing artificial blood vessel, so the transition blood vessel 5 can be sewn to the artificial blood vessel 1, after the implantation of the bracket is completed, only the excess part of the artificial blood vessel 1 needs to be cut off, and the artificial blood vessel 1 is disconnected from the shell 2; preferably, the guide cylinder II4 is connected to the shell 2 by a threaded pair (located on the wall of the bracket channel 21 and the outer surface of the guide cylinder II3), the guide cylinder II4 is removed in a spiral manner, and the rest of the semi-open blocking device can be reused to save resources.

[0033] In this embodiment, the medical semi-open blocking device also includes a pressure increaser and pressure reducer 6, which is connected to the flow port 24 through a connecting tube 7 and is used to fill or extract fluid into or out of the pressure chamber 22; the connecting tube 7 is a medical hose; the pressure of the fluid in the pressure chamber 22 can be controlled by the pressure increaser and pressure reducer 6, thereby controlling the opening and closing of the bracket channel 21; preferably, the pressure increaser and pressure reducer 6 is a syringe structure, which has strong versatility and can be configured separately.

[0034] In this embodiment, a connecting valve 8 is provided between the connecting pipe 7 and the pressure increasing and reducing device 6, one end of the connecting valve 8 is connected to the connecting pipe 7, and the other end is connected to the pressure increasing and reducing device 6, and the end connected to the pressure increasing and reducing device 6 is connected to a sealing cover 81, and the sealing cover 81 is tied to the connecting valve 8 by a tether 82; the connecting valve 8 can be a two-way valve structure or a three-way valve structure; the two ends of the connecting pipe 7 can be hot-melt connected to the flow port 24 and the connecting valve 8; in an idle state, the sealing cover 81 covers the end connected to the pressure increasing and reducing device 6 to prevent contamination and facilitate the storage of the product; the tether 82 prevents the sealing cover 81 from being lost.

[0035] Finally, it should be noted that this article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the core idea of ​​the present invention. Without departing from the principles of the present invention, the present invention may be further improved and modified, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A medical semi-open blocking device, characterized in that: It comprises a shell, in which a stent channel for a stent to pass through, a pressure chamber for accommodating a fluid and an elastic film for separating the stent channel from the pressure chamber are provided, and the shell is provided with a flow port connected to the pressure chamber for fluid to enter and exit; the proximal part of the blood vessel body is connected to the shell and connected to the stent channel; after the pressure chamber is filled with fluid, the elastic film is caused to expand toward the stent channel and block the stent channel; the elastic film is made of flexible silicone.

2. A medical semi-open blocking device according to claim 1, characterized in that: The shell is a rotating body structure, the support channel is arranged along the axial direction of the shell and forms a left end opening and a right end opening, and the right end opening is used to be connected to an artificial blood vessel.

3. A medical semi-open blocking device according to claim 2, characterized in that: The elastic film is arranged along the radial direction of the shell and takes the axis of the shell as the axis of symmetry.

4. A medical semi-open blocking device according to claim 2, characterized in that: The medical semi-open blocking device also includes a guide cylinder I with a guide channel I therein, wherein the guide cylinder I coaxially extends from the left end opening of the shell into the support channel and is fixedly connected, and the guide channel I is arranged along the axial direction of the guide cylinder and is connected to the support channel.

5. A medical semi-open blocking device according to claim 4, characterized in that: The guide cylinder I is connected to the housing via a thread pair or in an interference fit manner.

6. A medical semi-open blocking device according to claim 4, characterized in that: The medical semi-open blocking device also includes a guide cylinder II with a guide channel II therein, the guide cylinder II coaxially extends from the right end opening of the shell into the support channel and is fixedly connected, the guide channel II is arranged along the axial direction of the guide cylinder and is connected to the support channel; a transition blood vessel is fixedly sleeved outside the guide cylinder II, and the transition blood vessel is used to be sutured with an artificial blood vessel.

7. A medical semi-open blocking device according to claim 6, characterized in that: The guide cylinder II is connected to the shell through a threaded pair.

8. A medical semi-open blocking device according to any one of claims 1 to 7, characterized in that: The medical semi-open blocking device also includes a pressure increaser and pressure reducer, which is connected to the flow port through a connecting pipe and is used to fill or extract fluid from the pressure chamber.

9. A medical semi-open blocking device according to claim 8, characterized in that: The pressure increasing and decreasing device is a syringe structure.

10. A medical semi-open blocking device according to claim 8, characterized in that: A connecting valve is provided between the connecting pipe and the pressure regulator. One end of the connecting valve is connected to the connecting pipe and the other end is connected to the pressure regulator. The end connected to the pressure regulator is connected to a sealing cover, and the sealing cover is tied to the connecting valve by a tether.

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