CN217286674U - Medical perfusion device - Google Patents

Abstract

The utility model provides a medical perfusion device, which comprises a perfusion catheter and a blocking saccule, wherein the perfusion catheter penetrates through the blocking saccule; the blocking balloon is arranged at the far end of the perfusion catheter and is communicated with the filling lumen. The utility model discloses a medical perfusion device is when being used for the operation of blood vessel anastomosis, and its perfusion chamber of filling the pipe is connected with extracorporeal circulation equipment, carries out blood perfusion to patient's lower body, can reduce lower body internal organs and vertebra ischemia time, shortens the circulation time that stops in the art effectively, reduces postoperative complication, improves the operation effect. 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, the filling substance is injected into the filling lumen, so that the balloon is blocked to be inflated and expanded, the blood backflow of the main cavity of the aorta is blocked, and a clean operation visual field is created for a doctor.

Description

Medical perfusion device

Technical Field

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

Background

The aortic dissection refers to the state that blood in the aortic lumen enters the aortic media from the aortic intimal laceration part to separate the media, and expands along the major axis direction of the aorta to form true and false separation of the two lumens of the aortic wall, and is an aortic disease with danger, rapid progress and high mortality. Dissection hematoma in the middle aorta can cause severe cardiovascular emergencies, and 65% -70% of patients die from cardiac tamponade, arrhythmia and the like in an acute stage, so that early treatment is very necessary. At present, the main treatment mode for treating aortic dissection is surgical treatment, the principle for determining the surgical mode is the position of a dissection laceration, and the main treatment method of the Stanford B-type dissection with the laceration positioned in descending aorta is interventional treatment; the treatment method of the Stanford A-type interlayer with the lacerated involvement of the ascending aorta and the aortic arch is surgical operation, namely aortic arch replacement and bracket elephant nose operation.

In 2003, Sunshimai faithfulness and the like use four-branch artificial vascular aortic arch replacement and bracket elephant nose surgery to treat the Stanford A type aortic dissection, thereby further simplifying the surgical process. The operation needs to be applied to a cryogenic circulatory arrest technique in the implementation process, namely, the body temperature is reduced to about 15 ℃, the blood circulation of the lower half is arrested, the vascular anastomosis is completed in a bloodless environment, particularly, when the anastomosis operation of an artificial blood vessel and an autologous blood vessel is performed, the circulatory arrest is needed to ensure the bloodless operation field, and at the moment, blood perfusion of organs of the lower half such as viscera, spinal cord and the like can not be obtained. However, the prolonged deep hypothermia and circulatory arrest cause ischemia and hypoxia of organs and spinal cords of a body, so that the organs and the spine are damaged and related complications occur. Although the prior art (Sun's surgery) makes a good breakthrough, the technology still has a liftable space.

The current surgical difficulties mainly include: the operation needs to be performed in an extracorporeal circulation state, a deep low temperature circulation stopping technology needs to be adopted in the descending aorta anastomosis process, the body temperature is reduced to about 15 ℃, the blood circulation of the lower half of the body is stopped, the blood vessel anastomosis is completed in a bloodless environment, generally, a surgeon needs to use a needle holder to perform anastomosis in a narrow space for 25-30 minutes, even if a continuous anastomosis method which saves the most time is used, the most skilled surgeon needs 20 minutes, and therefore, the lower limb ischemia time is at least 20-30 minutes. During this period, organs such as spinal cord, kidney, liver, gastrointestinal tract and the like can be damaged by ischemia and hypoxia, which causes disadvantages to the recovery of patients after operation, and numerous complications also occur.

Therefore, it is one of the hot problems to be studied by those skilled in the art how to avoid deep hypothermia in total arch replacement and stent rhinoplasty, effectively shorten the circulation-down time during the operation, and shorten the ischemia time of the vital organs of the lower body of the patient, thereby reducing postoperative complications and improving the effect of the operation.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a medical perfusion device can shorten the circulation time that stops in the art effectively, shortens the ischemia time of patient's lower body vital organ, can create clean operation field of vision for the doctor simultaneously, reduces the operation degree of difficulty to reduce postoperative complication, improve the operation effect.

In order to achieve the above object, the utility model provides a medical perfusion device, including filling the pipe and blocking the sacculus, it is in to block the sacculus setting the distal end of filling the pipe, it runs through to fill the pipe block the sacculus, fill the pipe in the axial be provided with the chamber of filling and the sufficient lumen of mutual isolation, sufficient lumen with it is linked together to block the sacculus.

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

Optionally, a first conical head is arranged at the distal end of the support ring, a second conical head is arranged at the proximal end of the support ring, and the first conical head and the second conical head are arranged in a back-to-back manner.

Optionally, the first conical head has an axial length greater than an 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 tubing of the perfusion catheter is internally clamped with a spring wire.

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 and the perfusion catheter are connected by means of hot melting or laser welding.

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

Optionally, the medical infusion device further comprises a stress diffusion tube 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 utility model one of following beneficial effect has at least:

1. the external circulation device can carry out blood perfusion on the lower half of the body of a patient through a perfusion cavity of the perfusion catheter when the anastomosis operation of the distal end of the aortic arch is carried out after the elephant-nose bracket is implanted in the operation, so that the time of ischemia of organs of the lower half of the body and the spine is reduced, and the incidence rate of organ damage and related complications is reduced.

2. Before the perfusion catheter injects blood, a filling substance is injected into a filling lumen of the perfusion catheter, so that the balloon is blocked to be filled and expanded, and the blood backflow of the main lumen of the aorta can be blocked.

3. The medical perfusion device can also comprise a support ring, and the support ring is arranged in 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 blocking the sacculus in the distal end inner chamber of the trunk support according to the support ring and the interval between the sacculus, from this at the leading-in-process of medical perfusion device, can guarantee to block the sacculus and can not stretch out the trunk support outward, avoids blocking the risk that the sacculus harms the vascular intima, can create clean operation field of vision for the doctor, reduces the operation degree of difficulty.

4. The support ring is also provided with an inner concave structure, and for the case that the far-end laceration of the interlayer is affected with descending aorta, the bandage can be bound to the corresponding position of the circular arc inner concave structure of the support ring from the outside of the autologous blood vessel and is tightly bound, so that the blood return of the false cavity is blocked, and the operation visual field is improved.

Drawings

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

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

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

Fig. 4 is a schematic view of the medical perfusion device according to the embodiment of the present invention in a working state when the distal laceration of the dissector does not reach the descending aorta.

Fig. 5 is a schematic view of the medical perfusion device according to the embodiment of the present invention in a working state when the distal laceration of the dissector is involved in descending aorta.

Wherein the reference numerals are as follows:

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

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 obvious that the described embodiments are some, 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 perfusion apparatus herein has a proximal end (also referred to as a tail end) near or outside the body, and a distal end (also referred to as a head end) relatively far from the body, for example, the distal end of the perfusion catheter is the end which is first inserted into the body and finally relatively far from the body during operation, and the proximal end of the perfusion catheter is the end which is retained outside the body during operation and is connected to the extracorporeal circulation device interface.

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

The perfusion catheter 1 can be made of a bending-resistant and soft medical polymer material, such as polyvinyl chloride (PVC), medical silica gel and the like, so that the angle of the perfusion catheter 1 can be flexibly adjusted in the anastomosis operation process of the artificial blood vessel, the trunk stent and the autologous blood vessel of a doctor. As an example, the main body of the tube of the perfusion catheter 1 is made of a soft medical polymer material, and the spring wire 104 is clamped inside the tube, so as to improve the flexibility of the perfusion catheter 1, and ensure that the perfusion catheter 1 does not deform (mainly deformation such as collapse) or break when being bent, thereby achieving the bending resistance and soft mechanical properties of the perfusion catheter 1.

Referring to fig. 1 and fig. 2, a perfusion lumen 105b and a filling lumen 105a are provided in the perfusion catheter 1, the perfusion lumen 105b and the filling lumen 105a are both arranged to extend along the axial direction of the perfusion catheter 1, a balloon filling hole 102 is provided on a side wall of the perfusion catheter 1, the filling lumen 105a is communicated with the occlusion balloon 2 through the balloon filling hole 102, a proximal end of the filling lumen 105a is communicated with the second branch joint 502 of the joint 5, so that before the perfusion catheter 1 injects blood, a corresponding filling substance (for example, medical liquid such as physiological saline and the like) can be filled from the second branch joint 502, and the filled filling substance can be filled into the occlusion balloon 2 along the filling lumen 105a, so that the occlusion balloon 2 is inflated (i.e. inflated) to occlude the blood backflow of the main artery.

In addition, the medical perfusion device of the embodiment has a more compact and simple overall structure and is convenient to use because the perfusion cavity 105b and the filling lumen 105a are integrated in the same tube body.

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

Alternatively, the distal end of the infusion catheter 1 may be designed as a third tapered head 100 to facilitate introduction of the infusion catheter 1 into the lumen of the trunk support 7. Further optionally, the third conical head 100 may be opened with at least one perfusion hole 101 for ensuring the perfusion amount of the perfusion catheter 1 during blood perfusion. In this embodiment, the opening position of the pouring hole 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, and the number is four.

Referring to fig. 4, the occlusion balloon 2 is used to insert the distal end (also referred to as the distal lumen) of the intra-operative trunk stent 7, which is inflated before the perfusion catheter 1 is filled with blood, to occlude aortic true lumen blood backflow. The occlusion balloon 2 may be a compliant balloon made of a thermoplastic polyurethane elastomer rubber (TPU), polyester, polyethylene, polyurethane, silicone, or other medical deformable material. The maximum diameter of the expanded blocking balloon 2 can be designed according to the requirements of the inner cavity diameter of the autologous blood vessel 6 and the trunk stent 7, for example, 26mm-42mm, so as to ensure that the expanded blocking balloon 2 can be tightly attached to the inner wall of the trunk stent 7.

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

Further optionally, the blocking balloon 2 may be a double-layer structure, which is more beneficial to improving the pressure resistance and puncture resistance of the blocking balloon 2, and meanwhile, the contraction performance of the blocking balloon is not affected.

Referring to fig. 3 to 5, the support ring 3 is inserted into the proximal end inner cavity of the trunk stent 7, so that the proximal end of the trunk stent 7 is tightly attached to the proximal end of the autologous blood vessel 6, thereby facilitating the vascular anastomosis operation of the doctor. The support ring 3 can be injection molded by using a thermoplastic polyurethane elastomer (TPU) and other medical polymer materials, the distal end of the support ring 3 is provided with a first conical head 301, the proximal end of the support ring 3 is provided with a second conical head 302, and the first conical head 301 and the second conical head 302 are arranged in a reverse manner so as to facilitate the introduction and the withdrawal of the medical perfusion device without displacing the trunk support 7. Alternatively, the axial length L1 of the first conical head 301 at the distal end of the support ring 3 may be slightly longer, for example, 15mm to 25mm, to facilitate the introduction of the medical perfusion apparatus, and the axial length L2 of the second conical head 302 at the proximal end of the support ring 3 may be slightly shorter, for example, 5mm to 10mm, to avoid the influence of too long on the insertion of the needle by the doctor.

With reference to fig. 1, 3 and 4, the support ring 3 is sleeved on the perfusion catheter 1, and the design of the distance D between the support ring 3 and the blocking balloon 2 ensures that when the support ring 3 is supported at the edge of the proximal end of the trunk support 7, a doctor can judge that the blocking balloon 2 is located in the inner cavity of the distal end of the trunk support 7 and does not extend out of the trunk support 7 according to the distance D, 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 to 220 mm.

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

Alternatively, the area between the distal end of the support ring 3 and the proximal end of the support ring 3 is defined as a 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, and the concave structure 303 can be used with the binding band 9. In one embodiment, the concave structure 303 is a circular arc. For the case that the dissecting distal laceration 60 is affected by descending aorta, as shown in fig. 5, a bandage 9 is cooperatively tied on the outer side of the autologous blood vessel 6 at the concave structure 303 of the support ring 3, and the bandage 9 is tightened to enable the trunk support 7 to be tightly attached to the concave structure 303 of the support ring 3 and the autologous blood vessel 6 to the trunk support 7, so as to block the blood returning from the false cavity, create a clean operation visual field and prevent the blood returning from the false cavity from affecting the operation visual field. 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, a connector 5 is provided on the proximal end of the irrigation catheter 1, preferably a Y-connector, having a first branch connector 501 and a second branch connector 502. 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 an interface of an extracorporeal circulation device, and when the trunk support 7 is implanted and the aortic arch distal end anastomosis operation is performed, blood perfusion can be performed on the lower half of the body of the patient through the interface of the extracorporeal circulation device, the first branch joint 501 and the perfusion cavity 105b by the extracorporeal circulation device (not shown) which is externally connected, so that the time for ischemia of the lower half organ and the vertebra can be shortened, and the incidence rate of organ and vertebra damage and related complications 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 perfusion catheter 1, and the proximal end of the second branch joint 502 can be communicated with a pressurizing and depressurizing device such as an injector, so that when needed, filling substances such as physiological saline can be injected into the filling lumen 105a through the second branch joint 502, the filling substances enter the blocking balloon 2 through the balloon filling hole 102, so that the blocking balloon 2 is expanded to realize the blocking effect, and the filling substances such as the physiological saline in the blocking balloon 2 can be extracted through the second branch joint 502, so that the blocking balloon 2 is contracted, and the perfusion device can be conveniently withdrawn out of the body.

As shown in fig. 1, the stress diffusion tube 4 is connected to the proximal end of the perfusion catheter 1 and 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, so as to disperse the stress borne by the proximal end of the perfusion catheter 1, prevent the proximal end of the perfusion catheter 1 from bending, and ensure that the perfusion catheter 1 is implanted in the proper position of the inner cavity of the trunk support 7 in the body together with the blocking balloon 2 and the support ring 3 when the physician implants the perfusion catheter 1 together with the blocking balloon 2 and the support ring 3. In one embodiment, the stress diffusion tube 4 may be any suitable medical material that is resistant to bending, such as polyvinyl chloride (PVC), medical grade silicone, and the like.

It will be appreciated that the medical infusion device of the present embodiment is intended to be used in conjunction with an artificial blood vessel 8 and a trunk support 7 in order to perform a 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 perfusion apparatus of this embodiment are implanted in the body, the distal end of the perfusion catheter 1 passes out of the distal end of the trunk stent 7, and the artificial blood vessel 8 is arranged at the proximal end of the trunk stent 7 and is passed through by the perfusion catheter 1; the support ring 3 supports the near end of the trunk support 7, and the distance D between the support ring 3 and the blocking saccule 2 can ensure that the blocking saccule 2 is positioned in the far end inner cavity of the trunk support 7. The support ring 3 can make the trunk support 7 and the autologous blood vessel 6 tightly attached, and after the anastomosis operation of the blood vessel of a doctor, the artificial blood vessel 8 is anastomosed with the trunk support 7 and the autologous blood vessel 6 at the end.

In one embodiment, referring to fig. 4, the medical perfusion apparatus of this embodiment is applied to aortic arch replacement + stented elephant nose surgery, and the implementation process under the condition that the dissection distal laceration 60 does not involve the descending aorta (i.e. there is no dissection laceration 60 on the autologous blood vessel 6 in the figure) is as follows:

firstly, cutting off a self-body blood vessel 6 (namely an aortic arch part) under the selective cerebral perfusion in the environment of nasopharynx temperature of 25-28 ℃, cutting off an arch part distal anastomosis stoma (namely a interlayer distal laceration 60), and placing an intra-operative trunk stent 7 and an artificial blood vessel 8.

Then, the first branch connector 501 of the connector 5 of the medical perfusion apparatus of the present embodiment is connected to an extracorporeal circulation device, and the perfusion catheter 1 of the medical perfusion apparatus of the present embodiment is implanted together with the support ring 3 and the blocking balloon 2, and during the implantation, the distal end 100 of the perfusion catheter is sequentially passed through the artificial blood vessel 8 and the trunk support 7 and extended out of the distal lumen of the trunk support 7, and finally the blocking balloon 2 is ensured to be located in the distal lumen of the trunk support 7 and not to be extended out of the trunk support 7.

Thereafter, an inflation substance such as saline is injected through the second branch joint 502 of the joint 5, so that the occlusion balloon 2 is inflated and expanded, and the true lumen blood reflux of the autologous blood vessel 6 is blocked.

Next, the extracorporeal circulation apparatus is opened, and the extracorporeal circulation apparatus injects blood into the perfusion chamber 105b of the perfusion catheter 1 through the first branch joint 501, and recovers the lower body blood supply. At this time, the backflow of the perfused blood is blocked by the expanded blocking balloon 2, and the perfused blood flows into the organs of the lower body.

Then, the trunk stent 7, the artificial blood vessel 8 and the autologous blood vessel 6 are anastomosed.

After completing the anastomosis, the filling substance in the occlusion balloon 2 is withdrawn through the second branch joint 502, so that the occlusion balloon 2 is deflated and the perfusion catheter 1 together with the support ring 3 and the occlusion balloon 2 is then withdrawn from the body.

In another embodiment, referring to fig. 5, the medical perfusion device of this embodiment is applied to aortic arch replacement + stented elephant nose surgery, and the implementation process under the condition that the dissecting distal laceration 60 involves descending aorta is as follows:

firstly, cutting off a self-body blood vessel 6 (namely an aortic arch part) under the selective cerebral perfusion in the environment of nasopharynx temperature of 25-28 ℃, cutting off an arch part distal anastomosis stoma (namely a interlayer distal laceration 60), and placing an intra-operative trunk stent 7 and an artificial blood vessel 8.

Then, the first branch connector 501 of the connector 5 of the medical perfusion apparatus of the present embodiment is connected to an extracorporeal circulation device, and the perfusion catheter 1 of the medical perfusion apparatus of the present embodiment is implanted together with the support ring 3 and the blocking balloon 2, and during the implantation, the distal end 100 of the perfusion catheter is sequentially passed through the artificial blood vessel 8 and the trunk support 7 and extended out of the distal lumen of the trunk support 7, and finally the blocking balloon 2 is ensured to be located in the distal lumen of the trunk support 7 and not to be extended out of the trunk support 7.

Thereafter, an inflation substance such as saline is injected through the second branch joint 502 of the joint 5, so that the occlusion balloon 2 is inflated and expanded, and the true lumen blood reflux of the autologous blood vessel 6 is blocked.

Next, the extracorporeal circulation apparatus is opened to fill the perfusion chamber 105b of the perfusion catheter 1 with blood through the branch joint 501, and lower body blood supply is restored. At this time, the backflow of the perfused blood is blocked by the expanded blocking balloon 2, and the perfused blood flows into the organs of the lower body. At this time, since the distal dissection laceration 60 is involved in descending aorta, when blood is perfused, the perfused blood may enter the false lumen of the autologous blood vessel 6 through the distal dissection laceration 60 and flow back to the transected end face of the autologous blood vessel 6, which affects the operation visual field, so that the surgical bandage 9 (i.e. a conventional ligature rope) can be cooperatively used to ligature the autologous blood vessel 6 from the outside to the corresponding position of the autologous blood vessel 6 and the concave structure 303 of the middle section of the support ring 3, and then the false lumen blood return is blocked, thereby providing a clean operation visual field.

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

After completing the anastomosis, the filling substance in the occlusion balloon 2 is withdrawn through the second branch joint 502, so that the occlusion balloon 2 is deflated and the perfusion catheter 1 together with the support ring 3 and the occlusion balloon 2 is then withdrawn from the body.

Furthermore, it should be understood that the above-described embodiments are only some embodiments, but not all embodiments, and those skilled in the art can select or replace 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 another embodiment of the present invention, the concave structure 303 of the circular arc shape of the support ring 3 is replaced by the concave structure of other shapes. For another example, in another embodiment of the present invention, the support ring 3 may be omitted when the material, size and shape of the perfusion catheter are designed to meet the requirements of the operation. For another example, in another embodiment of the present invention, the stress diffusion tube 4 may be omitted when the material, size and shape of the perfusion catheter are designed to meet the surgical requirements. Also for example, the joint 5 is replaced with a joint of another type than a Y-joint, which is independent and separate from the joint connecting the proximal ends of the filling lumen and the perfusion lumen.

To sum up, the utility model provides a medical perfusion device, when being used for the operation of blood vessel anastomosis, can be with its perfusion catheter 1 and the interface connection of extracorporeal circulation equipment, from this after implanting medical perfusion device's corresponding part and trunk support 7, artificial blood vessel 8, and before perfusion catheter 1 annotates blood, can be through annotating sufficient material into the sufficient lumen 105a of perfusion catheter 1, make to block the sufficient expansion of sacculus 2, block the true chamber blood reflux of aorta, and then create clean operation field of vision for the doctor, reduce the operation degree of difficulty; then, the lower half of the 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 organs of the lower half of the body and the vertebra is reduced, the rest circulation time in the operation can be effectively shortened, the postoperative complications are reduced, and the operation effect is improved.

Further, the utility model discloses a medical perfusion device still has support ring 3, and this support ring 3 back in putting into the inner chamber of trunk support 7 enables trunk support 7 and the inseparable laminating of autologous blood vessel 6, makes things convenient for the doctor to carry out the anastomotic operation of trunk support 7, artificial blood vessel 8 and autologous blood vessel 6 from this. Particularly, in the case that the far-end laceration 60 of the interlayer is affected by descending aorta, the surgical bandage 9 can be used in a matched mode to be bound to the corresponding position of the circular-arc-shaped concave structure 303 of the middle section of the support ring 3 on the autologous blood vessel 6 from the outside of the autologous blood vessel 6 and tightly bound, and the problem of blood returning from the far-end laceration 60 of the interlayer is effectively solved.

The above description is only for the description of the preferred embodiment of the present invention, and not for any limitation of the scope of the present invention, and any changes and modifications made by those skilled in the art according to the above disclosure all belong to the scope of the technical solution of the present invention.

Claims (10)

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 cavity which are mutually isolated are axially arranged in the perfusion catheter, and the filling cavity is communicated with the blocking balloon.

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

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

4. The medical infusion device of claim 3, wherein an axial length of said first conical tip is greater than an axial length of said second conical tip.

5. The medical infusion device of claim 2, wherein the outer side wall of the middle section of the support ring is circumferentially provided with an indent.

6. The medical infusion device of claim 1, wherein the tubing of the infusion catheter is internally clamped with a spring wire.

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

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

9. The medical infusion device of any of claims 1-8, further comprising a connector disposed on the 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 diffusion tube connected to the proximal end of the infusion catheter between the fitting and the infusion catheter.

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