CN211023312U - Artificial blood vessel assembly for aortic surgery - Google Patents

Abstract

The utility model relates to the field of medical devices, and specifically discloses an artificial blood vessel assembly for aortic surgery, which comprises a blood vessel main body provided with a plurality of branch blood vessels, and a semi-open blocking device; the semi-open blocking device The device includes a housing, which is provided with a bracket channel for the bracket to pass through, a pressure chamber for accommodating fluid, and an elastic film for separating the bracket channel and the pressure chamber, the housing is provided with There is a flow port connected with the pressure chamber for fluid in and out; the proximal port of the blood vessel body is connected with the shell and communicated with the stent channel; the pressure chamber is filled with fluid to promote the elastic film to expand toward the stent channel direction and block the stent channel. The utility model enables the operation to be completed without adopting deep hypothermic circulatory arrest under the condition of antegrade placement of the stent, thereby reducing postoperative complications and improving the operation effect.

Description

An artificial vascular component for aortic surgery

technical field

The utility model relates to the field of medical instruments, in particular to an artificial blood vessel assembly used for aortic surgery.

Background technique

Total aortic arch replacement plus stent-like trunk surgery is widely used in the treatment of thoracic aortic aneurysm and acute and chronic type A aortic dissection. Approved. Regardless of whether the stent is placed retrogradely or antegradely, the deep hypothermic circulatory arrest technique must be used in the implementation of this operation, that is, the whole body needs to be cooled during the operation. Unilateral selective cerebral perfusion is performed through the tube. At this time, the lower body stops circulation, that is, the organs perfused by the descending aorta, including the spinal cord, liver, kidney, and digestive tract, are not perfused. After the stent is implanted in the true lumen of the descending aorta , using the "open anastomosis technique" to complete the anastomosis of the proximal end of the descending aorta and the distal end of the arch, then restore the perfusion of the lower body, and stop the circulation, and the time is generally controlled at about 20 to 30 minutes. However, deep hypothermia circulatory arrest is likely to cause a series of unavoidable problems such as internal environment disturbance, coagulation impairment, acute liver and kidney insufficiency, gastrointestinal dysfunction, spinal cord injury, etc., resulting in poor postoperative recovery, serious complications and even die. Therefore, how to shorten the deep hypothermic circulatory arrest time has important clinical application value.

Utility model content

In view of this, the purpose of the present invention is to provide an artificial blood vessel assembly for aortic surgery, so that the operation can be completed without using deep hypothermic circulatory arrest under the condition of antegrade stent placement, thereby reducing postoperative complications, Improve surgical outcomes.

The utility model provides an artificial blood vessel assembly for aortic surgery, comprising a blood vessel main body provided with a number of branch blood vessels, and a semi-open blocking device; the semi-open blocking device comprises a casing, the The housing is provided with a bracket channel for the bracket to pass through, a pressure chamber for accommodating fluid, and an elastic film for separating the bracket channel from the pressure chamber, and a universal connection with the pressure chamber is provided on the housing. The proximal port of the blood vessel main body is connected with the shell and communicated with the stent channel; the pressure chamber is filled with fluid to cause the elastic film to expand toward the stent channel and block the stent channel.

As a further improvement to the above technical solution, the casing is a revolving body structure, the stent channel is arranged along the axial direction of the casing and forms a left end opening and a right end opening, and the right end opening is connected to the main body of the blood vessel.

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

As a further improvement to the above technical solution, the semi-open blocking device further includes a guide cylinder I with a guide channel I inside, and the guide cylinder I coaxially extends into the bracket channel from the opening at the left end of the casing and is fixed connected, the guide channel I is arranged along the axial direction of the guide cylinder and communicates with the bracket channel.

As a further improvement to the above technical solution, the guide cylinder I and the housing are connected by a screw pair or by an interference fit.

As a further improvement to the above technical solution, the semi-open blocking device further includes a guide cylinder II with a guide channel II inside, and the guide cylinder II extends coaxially into the bracket channel from the opening at the right end of the housing and is fixed. The guide channel II is arranged along the axial direction of the guide cylinder and communicated with the stent channel; the guide cylinder II is fixedly sleeved with a transition blood vessel, and the transition blood vessel is sewed to the main body of the blood vessel.

As a further improvement to the above technical solution, the guide cylinder II and the housing are connected by a screw pair.

As a further improvement to the above technical solution, the semi-open blocking device further includes a pressure-pressure regulator, which is connected to the flow port through a communication pipe and used for filling or extracting fluid into the pressure chamber.

As a further improvement to the above technical solution, the pressure and pressure reducer is a syringe structure.

As a further improvement to the above technical solution, a connecting valve is provided between the communicating pipe and the pressure regulator. One end of the connecting valve is connected to the communicating pipe, and the other end is connected to the pressure reducing device. A sealing cover is connected to the connected end of the pressure device, and the sealing cover is fastened to the connecting valve by a tether.

Compared with the prior art, the utility model has the following beneficial technical effects:

The utility model provides an artificial blood vessel assembly for aortic surgery. During the operation, after the heart stops beating, the right innominate artery is processed, and a clamp is placed between the right innominate artery and the left common carotid artery. The right innominate artery has blood supply, and the left common carotid artery and left subclavian artery also supply blood through the femoral artery. Under the action of fluid pressure, the elastic film gradually expands towards the direction of the stent channel. When the fluid pressure reaches the set value, the elastic film blocks the stent channel. At this time, the proximal port of the blood vessel body is in a closed state, and then the forceps are opened. When the stent is opened and circulated, there is blood circulation in the descending aorta. Since the elastic membrane can partially open when the stent is driven by the delivery device, the stent is sent to the descending aorta through the stent channel and implanted to expand the true lumen. After implantation, the delivery device After exiting, the elastic film returns to a fully closed state. At this time, the blood in the vascular body is blocked again, the connection between the vascular body and the semi-open blocking device is disconnected, and the trimmed proximal port of the vascular body is anastomosed with the aortic root. After the surgery is completed, the semi-open blocking device is reusable.

It can be seen that the present application creatively uses the artificial blood vessel component for aortic surgery, so that the operation can be completed without deep hypothermic circulatory arrest in the case of antegrade stent placement, thereby reducing postoperative complications and improving the operation. Effect.

Description of drawings

Fig. 1 is the structural representation of the utility model;

FIG. 2 is a schematic structural diagram of the housing of the present invention.

Detailed ways

In order to make those skilled in the art better understand the technical solutions of the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments; Restrictions on Proprietary Products.

As shown in FIG. 1 and FIG. 2 : the present embodiment provides an artificial blood vessel assembly for aortic surgery, including a blood vessel body 1 provided with a number of branch blood vessels 11 (usually three-branch or four-branch structure), It also includes a semi-open blocking device; the semi-open blocking device includes a housing 2, and the housing 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 stent channel 21 from the pressure chamber 22, the casing 2 is provided with a flow port 24 that is connected to the pressure chamber 22 for fluid in and out; the proximal port portion of the blood vessel body 1 It is connected with the housing 2 and communicated with the stent channel 21 ; the pressure chamber 22 is filled with fluid to push the elastic membrane 23 to expand toward the stent channel 21 and block the stent channel 21 .

The structure of the blood vessel main body 1 is consistent with the prior art. Taking a four-branched artificial blood vessel as an example, the first branch of the four branch vessels 11 is anastomosed with the brachiocephalic artery, the second branch is anastomosed with the left internal jugular vein, and the second branch is anastomosed with the left internal jugular vein. The three branch vessels are anastomosed with the left subclavian artery, and the fourth branch vessel is used for perfusion or exhaust, which will not be repeated here. The blood vessel main body 1 and the casing 2 are sealed to prevent blood leakage. 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 will not be repeated; the delivery of the stent is carried out through a special delivery device, such as the structure shown in CN2933337Y , or an existing delivery device for interventional therapy.

In the semi-open blocking device, the elastic membrane 23 can block the stent channel 21 under the action of fluid pressure (the fluid acts on the inner surface of the elastic membrane 23) to prevent blood from flowing out of the stent channel 21 when the blood vessel main body 1 is congested; " "Semi-open" means that, due to the elastic effect of the elastic film 23, its outer surface can also be deformed adaptively when it is subjected to a force greater than the fluid pressure. At this time, although the elastic film 23 cannot block the stent channel 21, if This conduction can be filled by the object that produces this force, and the stent channel 21 is still in a blocked state (this can happen when the delivery device is delivering the stent, and the outer tube of the delivery stent can cause the elastic film when it extends in. 23 is deformed and always adheres to the outer surface of the elastic film 23 to fill the voids caused by the deformation).

The elastic film 23 can be made of flexible silicone; the fluid can be gas or liquid, as long as the elastic film 23 can be deformed; the shell 2 can be made of hard rubber; the support channel 21 and the pressure chamber 22 are separated by the elastic film 23 , the two are not connected all the time; the proximal port portion of the blood vessel main body 1 , that is, the end close to the heart, is the left end in FIG. 1 .

During the operation, after the heart stops beating, the right innominate artery is processed, and the clamp is placed between the right innominate artery and the left common carotid artery. At this time, the right innominate artery has blood supply, and the left common carotid artery and the left subclavian artery pass through the femoral artery. The artery also has blood supply, the position of the main vessel 1 and the blocking forceps are anastomosed, the four branch blood vessels 11 are clamped with forceps respectively, and the pressure chamber 22 is filled with fluid through the flow port 24, and the elastic film 23 gradually moves toward the stent under the action of fluid pressure. The channel 21 expands in the direction. When the fluid pressure reaches the set value, the elastic film 23 blocks the stent channel 21. At this time, the proximal port of the blood vessel body 1 is in a closed state, and then the forceps are opened. At this time, the circulation is opened, and the descending aorta is in a closed state. There is blood circulation, since the elastic film 23 can be partially opened when the delivery device drives the stent to pass through, the stent is sent 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, the blood in the vascular body 1 is blocked again, the connection between the vascular body 1 and the semi-open blocking device is disconnected, and the trimmed proximal port of the vascular body 1 is anastomosed with the aortic root. After the operation is completed, the semi-open blocking device can be reused.

It can be seen that the present application creatively uses the artificial blood vessel component for aortic surgery, so that the operation can be completed without deep hypothermic circulatory arrest in the case of antegrade stent placement, thereby reducing postoperative complications and improving the operation. Effect.

In this embodiment, the housing 2 is a revolving 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 shown in FIG. 1 and FIG. 2 ). The right end opening is connected to the main body 1 of the blood vessel; the casing 2 can be a cylinder or other suitable structure; the stent channel 21 is straight, which is convenient for the delivery of the stent; It is radially arranged and takes the axis of the housing 2 as the axis of symmetry, so that the elastic film 23 can be evenly pressed to enhance its sealing effect; way or integral molding or riveting.

In this embodiment, the semi-open blocking device further includes a guide cylinder I3 with a guide channel I31 therein. The guide cylinder I3 extends coaxially into the bracket channel 21 from the opening at the left end of the housing 2 and is fixedly connected. The guide channel I31 is arranged along the axial direction of the guide cylinder and communicates with the stent channel 21; the guide cylinder I3 is conducive to the conveyance of the guide stent; the guide cylinder I3 can be composed of two sections of cylinders, and its longitudinal section is in a "T" shape; The guide cylinder I3 and the housing 2 can be connected by a screw pair (the wall surface of the bracket channel 21 is connected with 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, by This improves the connection stability of the elastic film 23 .

In this embodiment, the semi-open blocking device further includes a guide cylinder II4 with a guide channel II41 therein. The guide cylinder II4 extends coaxially into the bracket channel 21 from the opening at the right end of the housing 2 and is fixedly connected. The guide channel II41 is arranged along the axial direction of the guide cylinder and communicates with the stent channel 21; the guide cylinder II4 is also beneficial to guide the delivery of the stent; but different from the guide cylinder I3, the guide cylinder II4 is also connected with the blood vessel main body 1. Specifically, In other words, the outer fixation sleeve of the guide tube II4 is provided with a transition blood vessel 5, which is the same as the existing artificial blood vessel, so the transition blood vessel 5 can be sewed with the main vessel 1, and after the stent is implanted, it is only necessary to Cut off the redundant part of the blood vessel body 1, and the blood vessel body 1 is disconnected from the housing 2; ) are connected, and 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.

In this embodiment, the semi-open blocking device further includes a pressure-pressure regulator 6, and the pressure-pressure reducer 6 is connected to the flow port 24 through the communication pipe 7 and is used for filling or extracting fluid into the pressure chamber 22; The communication tube 7 is a medical rubber tube; the fluid pressure in the pressure chamber 22 can be controlled by the pressure regulator 6, so as to control the on-off of the support channel 21; Can be configured individually.

In the present embodiment, a connecting valve 8 is provided between the communicating pipe 7 and the pressure reducing device 6 . One end of the connecting valve 8 is connected to the communicating pipe 7 and the other end is connected to the pressure reducing device 6 , and it is connected to the pressure reducing device 6 . A sealing cover 81 is connected to the connected end of the pressure and pressure reducer 6, and the sealing cover 81 is fastened to the connecting valve 8 through a tether 82; the connecting valve 8 can be a two-way valve structure or a three-way valve structure; The end can be connected to the flow port 24 and the connecting valve 8 by hot-melting; in the idle state, the sealing cover 81 covers the end connected with the pressure-compressor 6 to prevent contamination and facilitate the storage of the product; the tether 82 prevents Loss of sealing cap 81.

Finally, it should be noted that this article uses specific examples to illustrate the principles and implementations of the present utility model. The descriptions of the above embodiments are only used to help understand the core idea of the present utility model, without departing from the principles of the present utility model. , several improvements and modifications can also be made to the present utility model, and these improvements and modifications also fall within the protection scope of the present utility model.

Claims (10)

1. An artificial blood vessel component for aorta operation, comprising a blood vessel main body provided with a plurality of branch blood vessels, characterized in that: also comprises a semi-open type blocking device; the semi-open blocking device comprises a shell, wherein a support channel for a support to pass through, a pressure cavity for containing fluid and an elastic film for separating the support channel from the pressure cavity are arranged in the shell, and a circulation port communicated with the pressure cavity and used for allowing the fluid to enter and exit is formed in the shell; the proximal port of the blood vessel main body is connected with the shell and communicated with the bracket channel; the pressure chamber is filled with fluid to promote the elastic membrane to expand towards the direction of the support channel and block the support channel.

2. An artificial blood vessel assembly for aortic surgery as recited in claim 1, wherein: the shell is of a rotary body structure, the bracket 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 connected with the blood vessel main body.

3. An artificial blood vessel assembly for aortic surgery as claimed in claim 2, wherein: the elastic film is arranged along the radial direction of the shell and takes the axis of the shell as a symmetry axis.

4. An artificial blood vessel assembly for aortic surgery as claimed in claim 2, wherein: the semi-open type blocking device further comprises a guide cylinder I, wherein a guide channel I is arranged in the guide cylinder I, the guide cylinder I coaxially extends into the support channel from the left end opening of the shell and is fixedly connected with the support channel, and the guide channel I is arranged along the axial direction of the guide cylinder and is communicated with the support channel.

5. An artificial blood vessel assembly for aortic surgery as recited in claim 4, wherein: the guide cylinder I is connected with the shell through a thread pair or in an interference fit mode.

6. An artificial blood vessel assembly for aortic surgery as recited in claim 4, wherein: the semi-open blocking device further comprises a guide cylinder II which is internally provided with a guide channel II, the guide cylinder II coaxially extends into the bracket channel from the right end opening of the shell and is fixedly connected with the bracket channel, and the guide channel II is arranged along the axial direction of the guide cylinder and is communicated with the bracket channel; a transition blood vessel is fixedly sleeved outside the guide cylinder II, and the transition blood vessel is sewn with the blood vessel main body.

7. An artificial blood vessel assembly for aortic surgery as claimed in claim 6, wherein: and the guide cylinder II is connected with the shell through a thread pair.

8. An artificial blood vessel assembly for aortic surgery according to any one of claims 1 to 7 wherein: the semi-open type blocking device further comprises a pressure booster, and the pressure booster is connected with the circulation port through a communication pipe and is used for filling or extracting fluid into or out of the pressure cavity.

9. An artificial blood vessel assembly for aortic surgery as recited in claim 8, wherein: the pressure increasing and reducing device is in an injector structure.

10. An artificial blood vessel assembly for aortic surgery as recited in claim 8, wherein: a connecting valve is arranged between the communicating pipe and the pressure reducing and increasing device, one end of the connecting valve is connected with the communicating pipe, the other end of the connecting valve is connected with the pressure reducing and increasing device, one end of the connecting valve, which is connected with the pressure reducing and increasing device, is connected with a sealing cover, and the sealing cover is tied on the connecting valve through a tether.

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