CN116983496A

CN116983496A - Medical perfusion device

Info

Publication number: CN116983496A
Application number: CN202210465492.6A
Authority: CN
Inventors: 高阳; 刘金宏; 屠春霖; 朱永锋
Original assignee: Shanghai Minimally Invasive Heart Pulse Medical Technology Group Co ltd
Current assignee: Shanghai Minimally Invasive Heart Pulse Medical Technology Group Co ltd
Priority date: 2022-04-25
Filing date: 2022-04-25
Publication date: 2023-11-03

Abstract

The invention provides a medical perfusion device, which comprises a perfusion catheter and a blocking balloon, wherein the perfusion catheter penetrates through the blocking balloon; the perfusion catheter is internally provided with a perfusion cavity and a filling cavity which are isolated from each other, and the blocking saccule is arranged at the far end of the perfusion catheter and is communicated with the filling cavity. When the medical perfusion device is used for vascular anastomosis surgery, the perfusion cavity of the perfusion catheter is connected with the extracorporeal circulation equipment to perfuse blood into the lower body of a patient, so that the ischemia time of the viscera and the vertebra of the lower body can be reduced, the circulation stopping time in the surgery can be effectively shortened, the postoperative complications can be reduced, and the surgery effect can be improved. In addition, after the corresponding part of the medical perfusion device, the trunk stent and the artificial blood vessel are implanted, and before blood perfusion is carried out, filling substances are injected into the filling lumen, so that the blocking saccule can be used for filling and expanding, the blood reflux of the true lumen of the aorta is blocked, and a clean operation view is created for doctors.

Description

Medical perfusion device

Technical Field

The invention relates to the technical field of medical instrument design, in particular to a medical perfusion device.

Background

Aortic dissection refers to a state that blood in an aortic cavity enters an aortic media from an aortic intima tearing position to separate the media, and the blood is expanded along the long axis direction of the aorta to form true and false two-cavity separation states of the aortic wall, and is an aortic disease with dangerous illness state, rapid progress and high mortality rate. The interlayer hematoma of the middle aortic layer can cause severe cardiovascular emergency, 65% -70% die in the acute phase due to cardiac tamponade, arrhythmia, etc., so early treatment is very necessary. The main treatment mode for treating aortic dissection at present is surgical treatment, the principle for determining the surgical mode is the dissection breach position, and the main treatment method for the Stanford B-type dissection of the descending aorta is interventional treatment; the treatment of Stanford type a dissection that involves the ascending aorta and aortic arch is a surgical procedure, i.e. aortic arch replacement + stent trunk surgery.

In 2003 Sun Lizhong, the Stanford a aortic dissection was treated with four branch vascular prosthesis aortic arch replacement + stent trunk surgery, further simplifying the procedure. The operation needs to be applied to a deep low-temperature circulation stopping technology in the implementation process, namely, the body temperature is reduced to about 15 ℃, the blood circulation of the lower body is stopped, the vascular anastomosis is completed in a blood-free environment, and particularly, when the anastomosis operation of an artificial blood vessel and an autologous blood vessel is carried out, the circulation stopping is needed to ensure that the operation field is free from blood for facilitating the operation, and at the moment, the organs of the lower body such as viscera, spinal cord and the like cannot be perfused with blood. However, the prolonged deep low temperature and stop circulation can cause ischemia and hypoxia of organs and spinal cord of the organism, thereby causing damage to the organs and the spinal column and occurrence of related complications. Although the prior art (Sunshen operation) has a good breakthrough, the technology still has room for improvement.

The current operation difficulties mainly comprise: the operation is performed in an extracorporeal circulation state, a deep low-temperature stop circulation technology is needed in the descending aorta anastomosis process, the body temperature is reduced to about 15 ℃, the blood circulation of the lower body is stopped, the vascular anastomosis is completed in a blood-free environment, a surgeon usually needs to use a needle holder to anastomose for 25-30 minutes in a narrow space, and even if a continuous anastomosis mode which saves the most time is used, the most skilled surgeon needs 20 minutes, so that the ischemia time of the lower limb is at least 20-30 minutes. During this time, the spinal cord, kidneys, liver, gastrointestinal tract and other organs may be damaged by ischemia and hypoxia, which is detrimental to the patient's postoperative recovery, with numerous complications.

Therefore, how to avoid deep low temperature in full arch replacement and stent trunk surgery, effectively shorten the circulation stopping time in the surgery and shorten the ischemia time of the vital organs of the lower body of a patient, thereby reducing postoperative complications and improving the surgery effect, and becoming one of the hot problems studied by the technicians in the field.

Disclosure of Invention

The invention aims to provide a medical perfusion device which can effectively shorten the stop circulation time in operation and shorten the ischemia time of the vital organs of the lower body of a patient, and simultaneously can create a clean operation field for a doctor, reduce the operation difficulty, reduce postoperative complications and improve the operation effect.

In order to achieve the above purpose, the invention provides a medical perfusion device, which comprises a perfusion catheter and a blocking balloon, wherein the blocking balloon is arranged at the distal end of the perfusion catheter, the perfusion catheter penetrates through the blocking balloon, a perfusion cavity and a filling cavity which are mutually isolated are axially arranged in the perfusion catheter, and the filling cavity is communicated with the blocking balloon.

Optionally, the medical perfusion device further comprises a support ring, the support ring is sleeved on the perfusion catheter, and a required distance is reserved between the support ring and the blocking balloon, so that the blocking balloon is positioned in a distal inner cavity of a stent when the support ring is supported at a proximal edge of the stent.

Optionally, the distal end of the support ring is provided with a first conical head, the proximal end of the support ring is provided with a second conical head, and the first conical head and the second conical head are arranged in opposition.

Optionally, the axial length of the first conical head is greater than the axial length of the second conical head.

Optionally, an inner concave structure is circumferentially arranged on the outer side wall of the middle section of the support ring.

Optionally, the perfusion catheter is made of medical flexible materials, and a spring wire is clamped in the tube of the perfusion catheter.

Optionally, a third conical head is arranged at the distal end of the perfusion catheter, and a perfusion hole communicated with the perfusion cavity is formed in the third conical head.

Optionally, the blocking balloon is connected with the perfusion catheter by adopting a hot melting or laser welding mode.

Optionally, the medical infusion device further comprises a connector disposed on the proximal end of the infusion catheter, the connector comprising a first branch connector and a second branch connector, the first branch connector in communication with the infusion lumen, the second branch connector in communication with the filling lumen.

Optionally, the medical infusion device further comprises a stress diffuser connected to the proximal end of the infusion catheter and located between the connector and the infusion catheter.

Compared with the prior art, the technical scheme of the invention has at least one of the following beneficial effects:

1. the perfusion catheter is connected with the extracorporeal circulation device, and when the anastomosis operation of the aortic arch distal end is performed after the trunk stent is implanted in the operation, the extracorporeal circulation device can perform blood perfusion on the lower half body of a patient through the perfusion cavity of the perfusion catheter, so that the ischemia time of the lower half body organs and the spine is reduced, and the occurrence rate of the damage and related complications of the organs and the spine is reduced.

2. Before the perfusion catheter is used for infusing blood, filling substances are infused into the filling lumen of the perfusion catheter, so that the blocking balloon is enabled to be inflated and expanded, and the aortic vacuum blood reflux can be blocked.

3. The medical perfusion device can also comprise a support ring, and the support ring is placed into the inner cavity of the trunk support, so that the trunk support is tightly attached to the autologous blood vessel, and a doctor can conveniently perform anastomosis operation of the trunk support, the artificial blood vessel and the autologous blood vessel. And the doctor can judge the position of the blocking saccule in the far-end inner cavity of the trunk bracket according to the interval between the supporting ring and the blocking saccule, so that the blocking saccule can be prevented from extending out of the trunk bracket in the guiding process of the medical perfusion device, the risk of damaging the vascular intima by the blocking saccule is avoided, a clean operation field can be created for the doctor, and the operation difficulty is reduced.

4. The supporting ring is also provided with a concave structure, so that the band can be bound to the corresponding position of the arc-shaped concave structure of the supporting ring on the autologous blood vessel from the outside of the autologous blood vessel for the case that the dissection of the distal end of the interlayer affects the descending aorta, thereby blocking the blood return of the false cavity and improving the operation visual field.

Drawings

Fig. 1 is a schematic structural view of a medical perfusion apparatus according to an embodiment of the present invention.

Fig. 2 is a cross-sectional view of an infusion catheter in accordance with an embodiment of the present invention.

FIG. 3 is a schematic view of a support ring structure according to an embodiment of the present invention.

Fig. 4 is a schematic view showing the operation of the medical infusion device according to the embodiment of the present invention when the dissection distal end breach does not involve the descending aorta.

Fig. 5 is a schematic view showing the operation of the medical perfusion apparatus according to the embodiment of the present invention when the dissection distal end breach involves the descending aorta.

Wherein the reference numerals are specifically as follows:

1-perfusing a catheter; 100-a third conical head; 101-pouring holes; 102-balloon filling aperture; 103-a joint connection hole; 104-spring wire; 105 a-filling the lumen; 105 b-a perfusion chamber; 2-blocking balloon; 3-a support ring; 301-a first conical head; 302-a second conical head; 303-concave structure; 4-stress diffusion tube; a 5-linker; 501-a first branch joint and 502-a second branch joint; 6-autologous blood vessels; 60-distal breach of the interlayer; 7-trunk support; 8-artificial blood vessel; 9-banding; the spacing between the D-support ring and the blocking balloon; l1-the axial length of the first conical head; l2-axial length of the second conical head.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. For clarity of description, the medical infusion device herein is proximal (may also be referred to as a tail end) to the end that is proximal to or located outside the body, distal (may also be referred to as a head end) to the end that is capable of entering the body and relatively far from the body, e.g., the distal end of the infusion catheter is the end that is first to enter the body during surgery and finally relatively far from the body, and the proximal end of the infusion catheter is the end that is retained during surgery and interfaces with extracorporeal circulation equipment.

Referring to fig. 1 to 5, an embodiment of the present invention provides a medical perfusion apparatus, which includes a perfusion catheter 1, a blocking balloon 2, a support ring 3, a stress diffusion tube 4, and a joint 5. Wherein, the blocking balloon 2 is arranged at the distal end of the perfusion catheter 1, and the perfusion catheter 1 sequentially penetrates through the support ring 3 and the blocking balloon 2 along the direction from the proximal end to the distal end.

The perfusion catheter 1 is made of a flexible medical polymer material with bending resistance, such as polyvinyl chloride (PVC), medical silica gel, etc., so that the angle of the perfusion catheter 1 can be flexibly adjusted during the anastomosis operation of the artificial blood vessel, the trunk stent and the autologous blood vessel by a doctor. As an example, the main body of the tube of the perfusion catheter 1 is made of soft medical polymer material, and the spring wire 104 is clamped in the tube to improve the flexibility of the perfusion catheter 1, and meanwhile, the perfusion catheter 1 is ensured not to deform (mainly to collapse and other deformations) and not to break when being bent, so that the bending-resistant and soft mechanical property of the perfusion catheter 1 is realized.

Referring to fig. 1 and 2, a perfusion lumen 105b and a filling lumen 105a are disposed in the perfusion catheter 1 and isolated from each other, the perfusion lumen 105b and the filling lumen 105a are disposed along an axial direction of the perfusion catheter 1, a balloon filling hole 102 is formed on a side wall of the perfusion catheter 1, the filling lumen 105a is communicated with the blocking balloon 2 through the balloon filling hole 102, and a proximal end of the filling lumen 105a is communicated with a second branch joint 502 of the joint 5, so that a corresponding filling substance (for example, a medical liquid such as physiological saline) can be filled into the blocking balloon 2 along the filling lumen 105a before the perfusion catheter 1 is infused, and the filling substance can be filled into the blocking balloon 2 to expand (i.e. expand) the blocking balloon 2, thereby blocking blood backflow of the real aortic lumen.

In addition, the medical perfusion device of the embodiment has the advantages that the perfusion cavity 105b and the filling cavity 105a are integrated in the same tube body, so that the whole structure is more compact and simple, and the use is convenient.

Alternatively, the inner diameter of the infusion lumen 105a of the infusion catheter 1 may be designed according to the physician's need for an infusion volume, e.g. 4-10 mm.

Alternatively, the distal end of the infusion catheter 1 may be designed as a third conical head 100 to facilitate the introduction of the infusion catheter 1 into the lumen of the trunk stand 7. Further alternatively, the third conical head 100 may be provided with at least one perfusion hole 101 for ensuring the perfusion volume of the perfusion catheter 1 during blood injection. In this embodiment, the opening positions of the pouring holes 101 may be located at the distal end of the third conical head 100 or on the side wall of the third conical head 100, in number of four.

Referring to fig. 4, the occlusion balloon 2 is used for the distal end (also called distal lumen) of an intra-operative trunk stent 7, which is inflated and expanded before the infusion catheter 1 is infused with blood, for blocking the aortic vacuum blood reflux. The blocking balloon 2 may be a compliant balloon, and the material may be thermoplastic polyurethane elastomer rubber (TPU), polyester, polyethylene, polyurethane, silicone, and the like. The maximum diameter of the blocking balloon 2 after being expanded can be designed according to the requirements of the diameters of the autologous blood vessel 6 and the inner cavity of the trunk support 7, for example, 26mm-42mm, so that the blocking balloon 2 can be tightly attached to the inner wall of the trunk support 7 after being expanded.

Alternatively, the blocking balloon 2 and the perfusion catheter 1 may be connected by hot melt or laser welding.

Further alternatively, the blocking balloon 2 may have a double-layer structure, which is more advantageous in improving the pressure resistance and puncture resistance of the blocking balloon 2 without affecting the contractility thereof.

Referring to fig. 3 to 5, the support ring 3 is placed in the proximal cavity of the trunk support 7, so that the proximal end of the trunk support 7 is tightly attached to the proximal end of the autologous blood vessel 6, thereby facilitating the vascular anastomosis operation of the doctor. The supporting ring 3 is formed by injection molding of medical polymer materials such as thermoplastic polyurethane elastomer (TPU), a first conical head 301 is arranged at the distal end of the supporting ring 3, a second conical head 302 is arranged at the proximal end of the supporting ring 3, and the first conical head 301 and the second conical head 302 are arranged in a back-to-back mode, so that the trunk support 7 is conveniently not driven to shift when the medical infusion device is guided in or withdrawn. Alternatively, the axial length L1 of the first conical head 301 at the distal end of the support ring 3 may be slightly longer, e.g. 15mm-25mm, to facilitate introduction of the medical infusion device, and the axial length L2 of the second conical head 302 at the proximal end of the support ring 3 may be slightly shorter, e.g. 5mm-10mm, to avoid unduly affecting the insertion of the needle by the physician.

As shown in fig. 1, 3 and 4, the support ring 3 is sleeved on the perfusion catheter 1, and when the design of the space D between the support ring 3 and the blocking balloon 2 needs to ensure that the support ring 3 is supported at the proximal edge of the trunk stent 7, a doctor can judge that the blocking balloon 2 is positioned in the distal inner cavity of the trunk stent 7 according to the space D and does not extend out of the trunk stent 7, thereby avoiding the risk that the blocking balloon 2 damages the intima of the autologous blood vessel 6. In this embodiment, the distance D may be 80mm-220mm.

In addition, it should be appreciated that the maximum outer diameter of the support ring 3 needs to be designed to match the inner diameter of the trunk stent 7 lumen, for example by setting the maximum outer diameter of the support ring 3 to 16mm-40mm, thereby matching the inner diameters of different trunk stent 7 lumens.

Alternatively, the location between the distal end of the support ring 3 and the proximal end of the support ring 3 is defined as the middle section (not labeled) of the support ring 3, and the outer side wall of the middle section of the support ring 3 is provided with a concave structure 303 in the circumferential direction, which concave structure 303 may be used in combination with the tie 9. In one embodiment, the concave structure 303 is in a circular arc shape. For cases where the dissection distal breach 60 involves the descending aorta, as shown in fig. 5, a binding belt 9 is bound on the outer side of the autologous blood vessel 6 at the concave structure 303 of the support ring 3 in a matched manner, and the binding belt 9 is tightened, so that the trunk support 7 is tightly attached to the concave structure 303 of the support ring 3, the autologous blood vessel 6 and the trunk support 7, thereby blocking the false cavity blood return, creating a clean operation view, and avoiding the false cavity blood return from affecting the operation view. Furthermore, the outer surface of the support ring 3 needs to be as smooth as possible to avoid the risk of damaging the intima of the autologous blood vessel 6.

As shown in connection with fig. 1, 4 and 5, the joint 5 is provided on the proximal end of the infusion catheter 1, preferably a Y-joint, with a first branch joint 501 and a second branch joint 502. Wherein, the distal end of the first branch joint 501 is communicated with the proximal end of the perfusion cavity 105b, the proximal end of the first branch joint 501 is communicated with the interface of the extracorporeal circulation device, and when the trunk stent 7 is implanted and the aortic arch distal anastomosis operation is performed, the lower half of the patient can be perfused with blood through the interface of the extracorporeal circulation device, the first branch joint 501 and the perfusion cavity 105b by the external extracorporeal circulation device (not shown), so that the ischemia time of the lower half of the organ and the vertebra can be reduced, and the occurrence rate of the damage and related complications of the organ and the vertebra can be reduced. The distal end of the second branch joint 502 is communicated with the filling lumen 105a through the joint connecting hole 103 on the proximal end of the infusion catheter 1, and the proximal end of the second branch joint 502 can be communicated with an pressurizing and depressurizing device such as a syringe, so that when needed, filling substances such as physiological saline can be injected into the filling lumen 105a through the second branch joint 502, and the filling substances can enter the blocking balloon 2 through the balloon filling hole 102 so as to expand the blocking balloon 2 to realize the blocking effect, and filling substances such as physiological saline in the blocking balloon 2 can be extracted through the second branch joint 502 so as to enable the blocking balloon 2 to contract, thereby facilitating the medical infusion device to be withdrawn from the body.

As shown in fig. 1, a stress diffusion tube 4 is connected to the proximal end of the perfusion catheter 1 and is located between the joint 5 and the perfusion catheter 1, and the stress diffusion tube 4 is connected to the proximal end of the perfusion catheter 1 for dispersing stress born on the proximal end of the perfusion catheter 1 when the perfusion catheter 1 is implanted together with the blocking balloon 2 and the support ring 3 in surgery, preventing the proximal end of the perfusion catheter 1 from being bent, and ensuring that the perfusion catheter 1 is implanted together with the blocking balloon 2 and the support ring 3 at a proper position in the inner cavity of the trunk stent 7 in the body. In one embodiment, the stress riser 4 may be any suitable medical material that resists buckling, such as polyvinyl chloride (PVC), medical silicone, and the like.

It will be appreciated that the medical infusion device of the present embodiment is required to be used in conjunction with an artificial blood vessel 8 and trunk stand 7, thereby completing the corresponding surgical procedure. Referring to fig. 4 and 5, in the operation, after the trunk stent 7, the artificial blood vessel 8 and the medical infusion device of the present embodiment are implanted in the body, the distal end of the infusion catheter 1 is passed out from the distal end of the trunk stent 7, and the artificial blood vessel 8 is disposed at the proximal end of the trunk stent 7 and is passed through by the infusion catheter 1; the support ring 3 is supported at the proximal end of the trunk stand 7, and the spacing D between the support ring 3 and the blocking balloon 2 ensures that the blocking balloon 2 is positioned in the distal lumen of the trunk stand 7. The support ring 3 can enable the trunk support 7 to be closely attached to the autologous blood vessel 6, and after the vascular anastomosis operation of a doctor, the artificial blood vessel 8 is anastomosed with the trunk support 7 and the autologous blood vessel 6 in an end-to-end manner.

In one embodiment, please refer to fig. 4, the medical perfusion apparatus of the present embodiment is applied to aortic arch replacement+stent trunk surgery, and the implementation procedure is as follows in the case that the dissection distal breach 60 does not involve the descending aorta (i.e. no dissection breach 60 is shown on the autologous blood vessel 6):

first, under the condition of nasopharyngeal temperature of 25-28 ℃, the autologous blood vessel 6 (namely aortic arch) is cut off under selective cerebral perfusion, and the distal anastomosis of the arch (namely the interlayer distal breach 60) is trimmed, and the trunk stent 7 and the artificial blood vessel 8 are placed in the operation.

Then, the first branch joint 501 of the joint 5 of the medical infusion device of the present embodiment is connected to the extracorporeal circulation apparatus, and the infusion catheter 1 of the medical infusion device of the present embodiment is implanted together with the support ring 3 and the blocking balloon 2, and the distal end 100 of the infusion catheter sequentially passes through the artificial blood vessel 8 and the trunk stent 7 during implantation and protrudes out of the distal end lumen of the trunk stent 7, and finally the blocking balloon 2 is ensured to be positioned in the distal end lumen of the trunk stent 7 without protruding out of the trunk stent 7.

Thereafter, a filling substance such as physiological saline is injected through the second branch joint 502 of the joint 5 so that the blocking balloon 2 is inflated and expanded to block the real blood reflux of the autologous blood vessel 6.

Next, the extracorporeal circulation apparatus is opened, and the extracorporeal circulation apparatus infuses the perfusion lumen 105b of the perfusion catheter 1 through the first branch joint 501, restoring the blood supply to the lower body. At this time, the blood to be perfused is blocked by the inflated blocking balloon 2 and flows into the lower body organs.

Then, anastomosis operation of the trunk stent 7, the artificial blood vessel 8 and the autologous blood vessel 6 is performed.

After the anastomosis is completed, the filling material in blocking balloon 2 is withdrawn through second branch joint 502, so that blocking balloon 2 is contracted, and infusion catheter 1 is then withdrawn from the body along with support ring 3 and blocking balloon 2.

In another embodiment, please refer to fig. 5, the medical perfusion apparatus of the present embodiment is applied to aortic arch replacement+stent trunk surgery, and the implementation procedure in the case that the dissection distal breach 60 involves the descending aorta is as follows:

Next, the extracorporeal circulation apparatus is opened to fill the perfusion lumen 105b of the perfusion catheter 1 with blood through the branch joint 501, restoring the blood supply to the lower body. At this time, the blood to be perfused is blocked by the inflated blocking balloon 2 and flows into the lower body organs. At this time, since the dissection distal end breach 60 affects the descending aorta, when blood is perfused, the perfused blood may enter the false cavity of the autologous blood vessel 6 through the dissection distal end breach 60 and flow back to the transverse end face of the autologous blood vessel 6, affecting the surgical field, and therefore, the surgical tie 9 (i.e. conventional tying rope) may be used cooperatively to tie and tighten the blood from the outside of the autologous blood vessel 6 to the corresponding position of the indent structure 303 of the middle section of the support ring 3 on the autologous blood vessel 6, so as to block the false cavity from returning blood, thereby providing a clean surgical field.

Then, an end-to-end anastomosis operation is performed between the trunk stent 7, the artificial blood vessel 8 and the autologous blood vessel 6.

Furthermore, it should be understood that the above-described embodiments are only some embodiments of the present invention, and not all embodiments, and those skilled in the art may select or substitute the components of the above embodiments according to the above description and actual needs to obtain other embodiments of the present invention, for example, in other embodiments of the present invention, the circular arc-shaped concave structure 303 of the support ring 3 is replaced with a concave structure of other shapes. For another example, in other embodiments of the invention, the placement of the support ring 3 may be omitted when the infusion catheter is selected, sized and shaped to adequately meet the surgical requirements. For another example, in yet other embodiments of the present invention, the placement of the stress riser 4 may be omitted when the material, size, and shape of the infusion catheter is designed to be sufficient for the surgical requirements. Also for example, the connector 5 is replaced with other types of connectors than a Y-connector, which are separate and apart from the connector connecting the proximal end of the filling lumen and the connector connecting the proximal end of the perfusion lumen.

In summary, when the medical perfusion device provided by the invention is used for vascular anastomosis operation, the perfusion catheter 1 can be connected with the interface of the extracorporeal circulation equipment, so that after the corresponding part of the medical perfusion device, the trunk support 7 and the artificial blood vessel 8 are implanted, and before the perfusion catheter 1 is used for blood injection, filling substances can be injected into the filling lumen 105a of the perfusion catheter 1, so that the filling expansion of the sacculus 2 is blocked, the blood reflux of the main artery true lumen is blocked, a clean operation view is created for doctors, and the operation difficulty is reduced; the lower body of the patient can be perfused with blood through the perfusion cavity 105b of the perfusion catheter 1, so that the ischemia time of the lower body viscera and the spine is reduced, and the circulation stopping time in the operation can be effectively shortened, thereby reducing postoperative complications and improving the operation effect.

Furthermore, the medical perfusion device of the invention is also provided with the support ring 3, and after the support ring 3 is placed in the inner cavity of the trunk support 7, the trunk support 7 can be tightly attached to the autologous blood vessel 6, thereby facilitating the anastomosis operation of the trunk support 7, the artificial blood vessel 8 and the autologous blood vessel 6 for doctors. Particularly, for cases where the dissection distal end breach 60 affects the descending aorta, the surgical band 9 can be used in combination to bind the dissection distal end breach 60 from outside the autologous blood vessel 6 to the corresponding position of the circular arc-shaped indent structure 303 on the autologous blood vessel 6 and the middle section of the support ring 3 and tighten the dissection distal end breach, so that the problem of blood return from the dissection distal end breach 60 can be effectively solved.

The foregoing description is only illustrative of the preferred embodiments of the present invention and is not intended to limit the scope of the present invention in any way, and any alterations and modifications made by those skilled in the art in light of the above disclosure shall fall within the scope of the present invention.

Claims

1. The medical perfusion device is characterized by comprising a perfusion catheter and a blocking balloon, wherein the blocking balloon is arranged at the far end of the perfusion catheter, the perfusion catheter penetrates through the blocking balloon, a perfusion cavity and a filling lumen which are mutually isolated are axially arranged in the perfusion catheter, and the filling lumen is communicated with the blocking balloon.

2. The medical infusion device of claim 1, further comprising a support ring that fits over the infusion catheter with a desired spacing between the support ring and the occlusion balloon such that the occlusion balloon is positioned within a distal lumen of a stent when the support ring is supported on a proximal edge of the stent.

3. The medical infusion device of claim 2, wherein the distal end of the support ring is provided with a first conical head and the proximal end of the support ring is provided with a second conical head, the first conical head and the second conical head being disposed opposite one another.

4. A medical infusion device as in claim 3, wherein the axial length of the first conical head is greater than the axial length of the second conical head.

5. The medical infusion device of claim 2, wherein the outer sidewall of the intermediate section of the support ring is circumferentially provided with a concave structure.

6. The medical infusion device of claim 1, wherein the infusion catheter is made of a medical flexible material, and a spring wire is clamped inside the tube of the infusion catheter.

7. The medical infusion device of claim 1, wherein a third conical head is disposed at a distal end of the infusion catheter, and wherein an infusion orifice is formed in the third conical head in communication with the infusion lumen.

8. The medical infusion device of claim 1, wherein the occlusion balloon is attached to the infusion catheter by hot melt or laser welding.

9. The medical infusion device of any one of claims 1-8, further comprising a connector disposed on a proximal end of the infusion catheter, the connector comprising a first branch connector in communication with the infusion lumen and a second branch connector in communication with the filling lumen.

10. The medical infusion device of claim 9, further comprising a stress diffuser connected to the proximal end of the infusion catheter and located between the connector and the infusion catheter.