阅读说明：本技术 门静脉阻断装置 (Portal vein occlusion device ) 是由 李文杰 徐波 钱菲 于 2021-09-08 设计创作，主要内容包括：本发明公开了一种门静脉阻断装置,包括阻断带和卡接装置,所述阻断带的一端与卡接装置相连接,所述卡接装置上设有容纳阻断带另一端通过的锁紧通道,所述锁紧通道上设有卡扣结构,所述阻断带包括带体和膨胀体,所述膨胀体上连接有输入端和输出端,所述膨胀体通过输入端和输出端实现膨胀和收缩。本发明可以在极短的时间解决阻断门静脉的问题,切实做到不对门静脉附近的血管、组织和脏器造成损害,有效缩短手术时间,从而减低手术风险。(The invention discloses a portal vein blocking device which comprises a blocking belt and a clamping device, wherein one end of the blocking belt is connected with the clamping device, the clamping device is provided with a locking channel for accommodating the other end of the blocking belt to pass through, the locking channel is provided with a buckle structure, the blocking belt comprises a belt body and an expansion body, the expansion body is connected with an input end and an output end, and the expansion body is expanded and contracted through the input end and the output end. The invention can solve the problem of blocking the portal vein in a very short time, practically does not damage blood vessels, tissues and organs near the portal vein, effectively shortens the operation time and reduces the operation risk.)

1. A portal vein occlusion device, comprising: including blocking area and latch device, the one end in blocking area is connected with latch device, latch device is last to be equipped with and to hold locking passageway (1) that the blocking area other end passes through, be equipped with buckle structure on locking passageway (1), blocking area is including the area body (2) and inflation body (3), be connected with input and output on the inflation body (3), inflation body (3) are through input and output realization inflation and shrink.

2. The portal vein occlusion device of claim 1, wherein: the expansion body (3) comprises a first expansion structure (4) and a second expansion structure (5), the lengths of the first expansion structure (4) and the second expansion structure (5) are the same as that of the belt body (2), and the expansion rates of the first expansion structure (4) and the second expansion structure (5) are different.

3. The portal vein occlusion device of claim 2, wherein: the expansion body (3) further comprises a third expansion structure (6), and the third expansion structure (6) is arranged between the first expansion structure (4) and the second expansion structure (5).

4. The portal vein occlusion device of claim 3, wherein: the interior of the third expansion structure (6) is filled with an expansion sponge (7).

5. The portal vein occlusion device of claim 4, wherein: the clamping device comprises a base (8), the locking channel (1) is arranged in the base (8), a locking plate (9) is arranged above the base (8) in a rotating mode, the buckling structure is arranged below the locking plate (9), and a buckling groove structure matched with the buckling structure is arranged on the belt body (2) of the blocking belt.

6. The portal vein occlusion device of claim 5, wherein: the buckle structure is latch (10), the catching groove structure includes a plurality of chutes (11) corresponding to the latch (10), and the latch (10) and the chutes (11) are inclined towards one end of the outlet of the locking channel (1).

7. The portal vein occlusion device of claim 6, wherein: the input of inflation body (3) is connected with filling device, filling device includes gas cell (12), the both sides of gas cell (12) all are equipped with sleeve (13), the inside of sleeve (13) all is equipped with first infusion pipe (14) and second infusion pipe (15), is linked together through gas cell (12) between two first infusion pipes (14) in sleeve (13) of both sides, two be connected with between second infusion pipe (15) and lead liquid hose (16), first expanding structure (4) and second expanding structure (5) are connected in first infusion pipe (14), third expanding structure (6) are connected in second infusion pipe (15).

8. The portal vein occlusion device of claim 7, wherein: be connected with the non return device in first infusion pipe (14), the non return device includes check board (17), check spring (18) and limiting plate (19), the top of the first infusion pipe (14) of top of check board (17) is rotated and is connected, the one side that medium flowed into in check board (17) orientation first infusion pipe (14) is connected with check spring (18), the top of check spring (18) is connected with the top of first infusion pipe (14), limiting plate (19) be fixed in the bottom of first infusion pipe (14) and under normal condition with the bottom of check board (17) forms sealedly.

9. The portal vein occlusion device of claim 8, wherein: and a return spring (20) is arranged in the inner radial direction of the inflatable bag (12).

10. The portal vein occlusion device of claim 9, wherein: an automatic closing structure is arranged between the locking plate (9) and the base (8), and the automatic closing structure comprises two magnetic elements which are respectively arranged on the locking plate (9) and the base (8).

Technical Field

The invention belongs to the technical field of medical instruments, and particularly relates to a portal vein blocking device.

Background

Considering that 2-3 times of portal vein occlusion is needed in the liver and gall surgery process, the current clinical commonly adopted operation is as follows: after the patient opens the abdomen, the surgeon ligates the portal vein with a catheter. The method mainly comprises the following steps: two surgeons use surgical instruments such as surgical separating forceps, grasping forceps and knotting forceps to enable the catheter to surround the portal vein, then the front end of the catheter penetrates through a small hole in the tail end, and the portal vein is blocked by the aid of friction of the catheter. The operation of the process is difficult, time-consuming and labor-consuming, about three minutes is needed for observing two skilled surgeons, and 2-3 blocking and unlocking operations are needed in the whole operation process. This greatly prolongs the operation time, increases the risk of the operation, and is also very likely to cause damage to the blood vessels, tissues and organs near the portal vein.

The chinese invention patent with application number 2013107327791 discloses a hepatic portal blood flow blocking band under a filling type laparoscope, which comprises: an elongated tubular body; wherein a first end of the elongated tubular body in the length direction is open and a second end of the elongated tubular body in the length direction is closed, thereby forming an interior space having an opening at the first end; furthermore, the elongated tubular body has an inflated state when the filling medium is filled into the interior space through the opening at the first end; and, in a cross-section perpendicular to the longitudinal direction of the elongate tubular body, the wall thickness of the first side of the elongate tubular body is less than the wall thickness of the second side of the elongate tubular body, whereby in the inflated state the rate of expansion of the wall of the first side is greater than the rate of expansion of the wall of the second side. The blocking belt is mainly tied by surrounding all or part of the hepatoduodenal ligament, the control device is primarily tied, and the blocking belt is filled with a medium (air, CO2 or normal saline) and then expands inwards in a single direction, so that all or part of the hepatoduodenal ligament is tightly tied, and the hepatic artery and portal vein blood flow in the hepatoduodenal ligament is blocked.

Disclosure of Invention

In order to solve the problems, the invention provides a portal vein blocking device which comprises a blocking belt and a clamping device, wherein one end of the blocking belt is connected with the clamping device, the clamping device is provided with a locking channel for accommodating the other end of the blocking belt to pass through, the locking channel is provided with a buckle structure, the blocking belt comprises a belt body and an expansion body, the expansion body is connected with an input end and an output end, and the expansion body is expanded and contracted through the input end and the output end.

Preferably, the expansion body comprises a first expansion structure and a second expansion structure, the length of the first expansion structure and the length of the second expansion structure are the same as that of the belt body, and the expansion rates of the first expansion structure and the second expansion structure are different.

Preferably, the expansion body further comprises a third expansion structure, and the third expansion structure is arranged between the first expansion structure and the second expansion structure.

Preferably, the apparatus is characterized in that: the interior of the third expansion structure is filled with an expansion sponge.

Preferably, the clamping device comprises a base, the locking channel is arranged in the base, a locking plate is arranged above the base in a rotating mode, the buckling structure is arranged below the locking plate, and a buckling groove structure matched with the buckling structure is arranged on the belt body of the blocking belt.

Preferably, the buckle structure is a latch, the catching groove structure comprises a plurality of inclined grooves corresponding to the latch, and the latch and the inclined grooves are inclined towards one end of the outlet of the locking channel.

Preferably, the input end of the expansion body is connected with a filling device, the filling device comprises an inflatable bag, sleeves are arranged on two sides of the inflatable bag, a first infusion tube and a second infusion tube are arranged inside the sleeves, the two first infusion tubes in the sleeves on the two sides are communicated with each other through an airbag, a liquid guide hose is connected between the two second infusion tubes, the first infusion tube is connected with the first expansion structure and the second expansion structure, and the second infusion tube is connected with the third expansion structure.

The preferred, be connected with the non return device in the first infusion pipe, the non return device includes check board, non return spring and limiting plate, the top of the first infusion pipe in top of check board is rotated and is connected, the one side that the medium flowed into towards the first infusion pipe of check board is connected with the non return spring, the top and the top of first infusion pipe of non return spring are connected, the limiting plate be fixed in the bottom of first infusion pipe and under normal condition with the bottom of check board forms sealedly.

Preferably, a return spring is arranged in the inner radial direction of the inflatable bag.

Preferably, an automatic closing structure is arranged between the locking plate and the base, and the automatic closing structure is two magnetic elements which are respectively arranged on the locking plate and the base.

The invention has the advantages that:

1. the problem of blocking the portal vein can be solved in a very short time, the damage to blood vessels, tissues and organs near the portal vein is practically avoided, the operation time is effectively shortened, and the operation risk is reduced. After being converted into a product, the product has good social benefit and economic benefit.

2. The blood spillage due to the bundling method can be reduced by the structure of the expansion body.

Drawings

FIG. 1 is a schematic view of the fastened structure of the blocking strap of the present invention;

FIG. 2 is a schematic view of the composition of the blocking strip of the present invention;

FIG. 3 is a schematic view of an end construction of the blocker belt of the present invention;

FIG. 4 is a schematic view of the expanded end of the occluding tape inflation body of the present invention;

FIG. 5 is a view showing a state that the blocking tape of the present invention moves from an inlet to an outlet of a lock passage;

FIG. 6 is a view showing a state where the blocking tape of the present invention is moved from the outlet of the locking passage to the inlet;

FIG. 7 is a schematic view of a circumferential vein configuration of the occlusion band of the present invention;

FIG. 8 is a schematic view of a first state of the blood passageway after inflation with a band clamp of the present invention;

FIG. 9 is a schematic view of a second state of the blood passageway after being inflated with the occlusion band of the present invention;

FIG. 10 is a schematic view of a third state of the blood passageway after inflation with a blocking band of the present invention;

FIG. 11 is a schematic view of the external structure of the clamping device of the present invention;

FIG. 12 is a schematic view of the structure of the inflatable bladder of the present invention;

FIG. 13 is a schematic view of the check device of the present invention;

in the figure: the device comprises a locking channel 1, a belt body 2, an expansion body 3, a first expansion structure 4, a second expansion structure 5, a third expansion structure 6, an expansion sponge 7, a base 8, a locking plate 9, a latch 10, a chute 11, an inflatable bag 12, a sleeve 13, a first infusion tube 14, a second infusion tube 15, a liquid guide hose 16, a check plate 17, a check spring 18, a limiting plate 19 and a return spring 20.

Detailed Description

The technical solution in 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.

Example 1

As shown in fig. 1-6, a portal vein blocking device comprises a blocking belt and a clamping device, one end of the blocking belt is connected with the clamping device, the clamping device is provided with a locking channel 1 for accommodating the other end of the blocking belt to pass through, the locking channel 1 is provided with a buckle structure, the blocking belt comprises a belt body 2 and an expansion body 3, the expansion body 3 is connected with an input end and an output end, the expansion body 3 realizes expansion and contraction through the input end and the output end, as shown in fig. 2, the bottom of the blocking belt is the belt body 2, the top of the utility model is provided with a layer of expandable expansion body 3, the expansion body 3 can be made of medical resin, medical silica gel and other common expandable materials on the market, and adopts a structure with one surface provided with the expansion body 3 and the other surface provided with the belt body 2, it is ensured that only one side of the occlusion band will swell, so that the stability will be better, otherwise once both sides swell, it will easily cause damage to the organs around the vein. The blocking belt is wound around the meridians, as shown in fig. 1, the blocking belt is firstly required to be bent to form a ring shape, the expansion body 3 is positioned at the inner side of the ring-shaped blocking belt, the head end of the blocking belt is fixedly connected with the clamping device, after the bending, the tail end of the blocking belt penetrates through the locking channel 1 of the clamping device to form a structure that the blocking belt is connected end to end, after the blocking belt is formed into the ring shape, the blocking belt is wound around the veins, then the tail end of the blocking belt is continuously pulled to enable the blocking belt to continuously move, the diameter of the formed ring can be gradually reduced, and after the diameter of the ring is reduced enough to block the veins, the tail end of the blocking belt is locked and fixed through the clamping device, so that the initial fastening of the veins is realized. The embodiment further explains a structural form of the clamping device, the clamping device comprises a base 8, a locking channel 1 is arranged in the base 8, an opening structure is arranged above the base 8, a locking plate 9 is arranged on the left side of the base 8 in a rotating mode, the buckling structure is arranged below the locking plate 9, a buckle groove structure matched with the buckling structure is arranged on a band body 2 of the blocking band, the buckling structure is a clamping tooth 10, the clamping tooth 10 and a chute 11 are inclined towards one end of an outlet of the locking channel 1, before the tail of the blocking band enters a lock body channel, the locking plate 9 is rotated upwards, then the blocking band rapidly penetrates through the locking channel 1 until the blocking band tightens a vein, then the locking plate 9 is rotated downwards, the clamping tooth 10 at the bottom of the locking plate 9 is clamped into the chute 11 on one side of the blocking band 2, the tail of the blocking band is clamped, and further movement of the blocking band is limited. In order to further optimize the locking step, an automatic closing structure is arranged between the locking plate 9 and the base 8, after the tail part of the blocking belt is inserted into the locking channel, the latch 10 and the chute 11 are inclined towards one end of the outlet of the locking channel 1, the outlet of the locking channel 1 blocks the direction of the belt moving outwards from the locking channel 1, therefore, when the tail part of the blocking belt moves outwards from the outlet of the locking channel 1 through the locking channel 1, one surface of the blocking belt body 2 and one side of the chute 11 contacted with one side of the inclined surface of the latch 10, the latch 10 drives the latch 10 to move upwards through the inclined surface by pressing the inclined surface due to the inclined surface, as shown in fig. 5, so that the blocking belt passes through the bottom of the locking plate 9, the same is true when the latch 10 meets the chute 11, and due to the inclined surface, the latch 10 moves upwards, and cannot form a block on the blocking belt, due to the presence of the auto-close device, the locking plate 9 will always be above the blocking strap. However, if the blocking belt is going to move from the outlet to the inlet of the locking channel 1, that is, the blocking belt is going to move back, as shown in fig. 6, due to the existence of the latch 10, the inclined groove 11 of the blocking belt faces the hook tip of the latch 10, and the hook tip of the latch 10 will block the inclined groove 11, so that the blocking belt cannot move back, that is, the automatic closing device cooperates with the buckle structure and the buckle groove structure, so that the locking channel 1 becomes a non-return channel, and the blocking belt can only move from the inlet to the outlet of the locking channel 1, but cannot move from the outlet to the inlet, so that the blocking belt is not loosened after being tightened, and the only way to release the blocking belt is to open the locking plate 9 manually, so that the latch 10 is separated from the inclined groove 11; the automatic closing device is matched with the buckle structure and the buckle groove structure to ensure that the blocking belt can be automatically locked after being fastened, so that the step of opening the locking plate 9 during locking is omitted, and the automatic closing device is more automatic and convenient; the automatic closing structure can be composed of various structures, such as a spring is arranged between the base 8 and the side edge of the locking plate 9, the locking plate 9 is pulled by the spring to be in a closed state at any time under the effect of no external force, while the automatic closing structure in the embodiment adopts two magnetic elements, one magnetic element is arranged inside the bottom side of the locking plate 9, the other magnetic element is arranged inside the top side of the base 8, when the locking plate 9 is closed, the two magnetic elements are in corresponding positions, the two magnetic elements are opposite magnetic poles, the locking plate 9 is ensured to be covered above the opening of the base 8 by means of magnetic adsorption, compared with the spring, the magnetic elements are arranged in the inner parts of the base 8 and the locking plate 9, the base 8 and the locking plate 9 are both made of medical plastics, the damage to the body can not be caused, and the magnetic elements are arranged in the medical plastics, the magnetic force is not influenced, and the body cannot be influenced, and if an external closed structure such as a spring is adopted, the spring is generally made of metal materials, so that the spring is easy to rust after being contacted with moisture in the air, and the spring is arranged on a blocking device and is easy to cause infection when being contacted with a wound of a human body. Above be exactly the introduction of relevant latch device in this embodiment, after blocking the work that the area accomplished to tighten the vein, inflate through filling device toward blocking the inflation body 3 on the area body 2, inflation body 3 can take place the inflation to can make the leakproofness of blocking better, further promote the vein and block the effect.

Example 2

As shown in fig. 7-13, this embodiment has the same parts as embodiment 1, and this embodiment is a further optimization of embodiment 1, as shown by mark a in fig. 7, mark a represents a gap, which is caused by the fact that the head and the tail of the blocking tape cannot be completely overlapped, a height difference is formed between the head and the tail of the blocking tape, this height difference will form a gap, the size of the gap varies according to the thickness variation of the blocking tape, the larger the thickness of the blocking tape, the larger the gap, the smaller the thickness of the blocking tape, the smaller the gap, but the thickness of the blocking tape cannot be too small, otherwise the blocking tape is easy to break, if it is desired to completely eliminate the gap, the head and the tail of the blocking tape must be completely overlapped, but in the case of completely overlapping, the diameter of the ring structure formed by bending the blocking tape cannot be changed, this leads to the blocking tape not being able to tighten the vein, and therefore, it is impossible to completely overlap, that is, after the blocking tape forms a ring to tighten the vein, there is inevitably a gap, which will form a blood channel H in the tightened vein, and will cause blood loss in the vein, in order to solve this problem, in this embodiment, the expansion body 3 is improved, the expansion body 3 includes a first expansion structure 4 and a second expansion structure 5, the lengths of the first expansion structure 4 and the second expansion structure 5 are the same as the tape body 2, the expansion rates of the first expansion structure 4 and the second expansion structure 5 are different, as shown in fig. 4, the first expansion structure 4 and the second expansion structure 5 can be made of different expansion materials or the same material and different thicknesses as in the prior art, in order to make the volumes of the two expansion structures different, so that the volume of the first expansion structure 4 after expansion is smaller than the second expansion structure 5, as shown in fig. 7, after the vein is tied by the occlusion band, the first expansion structure 4 and the second expansion structure 5 are inflated to further compress the vein, the first expansion structure 4 and the second expansion structure 5 are located at two sides, and a certain space is formed between the first expansion structure 4 and the second expansion structure 5 after the inflation, and a small blood channel H is inevitably formed inside the vein due to the existence of the gap a, as shown in fig. 8-10, the expansion volume of the first expansion structure 4 is smaller than that of the second expansion structure 5, and the expansion volume of the second expansion structure 5 is regarded as the limit of the expansion and compression, at this time, the internal blood of the vein continues to flow due to the blood channel H formed by the gap a, the flow direction is shown by the arrow in fig. 8-10, after the blood channel H is further compressed by the two expansion bodies 3, the portion tied by the occlusion band forms a structure with two narrow sides and wide middle, under the action of blood pressure, blood firstly passes through a compression neck part b formed by the first expansion structure 4, then enters a space part formed between the two expansion bodies 3, and then passes through a compression neck part c formed by the second expansion structure 5 again, the diameter of a blood channel is reduced by the compression neck part b formed by the first expansion structure 4, after the diameter is reduced, the flow rate of the blood is accelerated, but friction force exists between blood vessels and the blood, and the friction force is increased when the flow rate is higher, so that the flow rate of the blood in the same time is reduced; therefore, after passing through the compression neck b, the flow rate and pressure of the blood become small, and when the part of the blood passes through the other compression neck c, since the expansion volume of the first expansion structure 4 is smaller than that of the second expansion structure 5, that is, the diameter of the compression neck b formed by the first expansion structure 4 is larger than that of the compression diameter c formed by the second expansion structure 5, the flow rate and pressure are inevitably further reduced, and then, compared with the conventional mode that only one compression neck is provided, the technical scheme can further reduce the loss of the blood.

In addition, according to the first expanded configuration 4 having an expanded volume smaller than that of the second expanded configuration 5, that is to say the diameter of the compressed neck formed by the first expanded configuration 4 is greater than that of the compressed diameter formed by the second expanded configuration 5, then, in the same time, the blood volume of the compressed neck formed by the first expansion structure 4 is larger than that of the compressed neck formed by the second expansion structure 5, a flow difference is generated between the two, and the blood volume is similar to a water pool which is provided with a water outlet and a water inlet, the flow of the water inlet is larger than that of the water outlet, at the moment, blood will accumulate in the blood channel between the two inflatable bodies 3, the blood vessel channel will expand, only when the blood vessel has expanded to a certain volume, the pressure of the blood flow at the compressed neck created by the second expandable structure 5 will gradually increase, restoring the outflow of blood to a normal level. But compared with the traditional hemostasis method, the method necessarily reduces a part of blood outflow, the whole operation needs 3-4 times of blockage, so the amount is much less, the blood is important for human bodies, and the device can reduce blood loss to the maximum extent in the operation process.

Furthermore, the inflatable body 3 comprises a third inflatable structure 6, the third inflatable structure 6 being arranged between the first inflatable structure 4 and the second inflatable structure 5, the third inflatable structure 6 being of the same significance as described above, both for further reducing the blood flow and pressure and for reducing blood loss. The third expansion structure 6 is filled with an expansion sponge 7, and can be expanded by water injection, and the compression diameter of the third expansion structure 6 to the blood channel is smaller than that of the first expansion structure 4 to the blood channel and larger than that of the second expansion structure 5 to the blood channel.

The filling device comprises an inflatable bag 12, sleeves 13 are arranged on two sides of the inflatable bag 12, a first infusion tube 14 and a second infusion tube 15 are arranged inside the sleeves 13, the two first infusion tubes 14 in the sleeves 13 on the two sides are communicated through an airbag, a liquid guide hose 16 is connected between the two second infusion tubes 15, the first infusion tube 14 is connected with a first expansion structure 4 and a second expansion structure 5, the second infusion tube 15 is connected with a third expansion structure 6, a check device is connected in the first infusion tube 14 and comprises a check plate 17, a check spring 18 and a limiting plate 19, the top of the first infusion tube 14 at the top of the check plate 17 is rotatably connected, the check plate 17 is connected with the check spring 18 towards the medium flowing-in side of the first infusion tube 14, the top of the check spring 18 is connected with the top of the first infusion tube 14, the limiting plate 19 is fixed at the bottom of the first infusion tube 14 and forms a seal with the bottom of the check plate 17 under a normal state, the inflatable bag 12 is squeezed, the first expansion structure 4 and the second expansion structure 5 can be inflated, the first infusion pipes 14 are arranged in the sleeves 13 on the two sides of the inflatable bag 12, the gas can only flow along one direction due to the check devices in the first infusion pipes 14, the return springs 20 are arranged in the inner radial direction of the inflatable bag 12, the inflatable bag can be quickly compressed and then restored, water is injected into the second infusion pipes 15, and the third expansion structure 6 can be expanded.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.