CN115969472A

CN115969472A - Combined instrument for connecting blood vessels

Info

Publication number: CN115969472A
Application number: CN202111205426.7A
Authority: CN
Inventors: 刘晓程
Original assignee: Individual
Current assignee: TEDA INTERNATIONAL CARDIOVASCULAR HOSPITAL
Priority date: 2021-10-15
Filing date: 2021-10-15
Publication date: 2023-04-18

Abstract

A combined instrument for connecting blood vessels comprises an incision component and a blood vessel to be installed, wherein the incision component comprises a barrel body and a cutter, the cutter is arranged in the barrel body and is in sliding connection with the barrel body, the blood vessel to be installed is arranged in the barrel body and is sleeved outside the cutter, the distal end part of the blood vessel to be installed is detachably installed on the barrel body, the proximal end part of the blood vessel to be installed is located at the proximal end part of the barrel body, a clamping component is arranged at the proximal end part of the blood vessel to be installed, and the clamping component comprises a first clamping wall and a second clamping wall which are in elastic connection; under the initial state, the second clamping wall is clamped in the cutter, the second clamping wall can cut into the main blood vessel along with the cutter, in the use state, the cutter can make the second clamping wall break away from the cutter mutually towards the displacement in the main blood vessel, the second clamping wall breaking away from the cutter can rotate to be arranged opposite to the first clamping wall, and the first clamping wall and the second clamping wall which are arranged oppositely can clamp the blood vessel wall of the main blood vessel. The combined instrument is simple to use, has short operation time, and reduces the pain of a patient.

Description

Combined instrument for connecting blood vessels

Technical Field

The invention relates to the technical field of medical instruments, in particular to a combined instrument for connecting blood vessels.

Background

When a local lesion occurs in an arterial or venous blood vessel, a common solution is to establish a bypass blood vessel to bypass the lesion and restore blood supply. Taking an aortic bypass blood vessel establishing operation as an example, so far, the operation must be carried out by using a known scalpel, making a longitudinal incision on the side wall of the aorta clamped by a side wall clamp, and anastomosing the end of the bypass blood vessel on the aortic incision by using an operation needle and a suture, and the traditional operation is complex, has higher requirements on the level of an operator and has high implementation difficulty.

Disclosure of Invention

The invention aims to provide a combined instrument for connecting blood vessels, which is simpler to use, has relatively lower level requirements on operators, lower implementation difficulty and shorter operation time, and is more favorable for reducing the pain of the operated people.

In order to solve the technical problems, the invention provides a combined instrument for connecting blood vessels, which comprises a cutting assembly and a blood vessel to be installed, wherein the cutting assembly comprises a barrel body and a cutter, the cutter is arranged in the barrel body and is in sliding connection with the barrel body, the blood vessel to be installed is also arranged in the barrel body and is sleeved outside the cutter, the distal end part of the blood vessel to be installed is detachably installed on the barrel body, the proximal end part of the blood vessel to be installed is positioned at the proximal end part of the barrel body, the proximal end part of the blood vessel to be installed is provided with a clamping member, and the clamping member comprises a first clamping wall and a second clamping wall which are elastically connected; under the initial state, the second joint wall card adorns in the cutter makes the second joint wall can follow the cutter cuts into main blood vessel, under the user state, the cutter orientation the inside displacement of main blood vessel can make the second joint wall with the cutter breaks away from mutually, with the cutter breaks away from mutually the second joint wall can the elastic rotation to with first joint wall sets up relatively, relative setting first joint wall, the second joint wall can press from both sides tightly the vascular wall of main blood vessel.

Above-mentioned combination apparatus when using, only need control the cutter at the vascular wall incision of main blood vessel to the relative barrel of control cutter removes towards main blood vessel inside, makes second joint wall can break away from mutually with the cutter, and second joint wall can kick-back automatically to setting up relatively with first joint wall, and then presss from both sides tight main blood vessel's vascular wall, in order to accomplish to wait to install the butt joint of blood vessel and main blood vessel.

Compared with the background technology, the combined instrument provided by the invention is simpler to use, has relatively lower level requirements on operators, lower implementation difficulty and shorter operation time, and is more beneficial to reducing the pain of the operated people.

Optionally, the outer wall of the cutter is provided with a necking groove extending along the axial direction, and in an initial state, the second clamping wall is clamped in the necking groove.

Optionally, the cutter comprises a cutter head, and the necking groove is formed in the outer wall of the cutter head.

Optionally, the second clamping wall includes a plurality of partition walls arranged at intervals along the circumferential direction, the number of the necking grooves is multiple, and in an initial state, each partition wall is clamped in the corresponding necking groove in a one-to-one correspondence manner.

Optionally, the upper end of the necking groove is further communicated with an accommodating groove which does not limit the rotation of the second clamping wall and is used for accommodating the second clamping wall and/or connecting the first clamping wall and the second clamping wall.

Optionally, the snap member is configured with a hemostatic component.

Optionally, the cutter comprises a cutting head, which in an initial state has a portion protruding from the proximal end of the barrel, the proximal end of the cutting head being provided with a spike and a blade.

Optionally, a transition connector is further disposed at the proximal end portion of the blood vessel to be installed, the transition connector includes a cylindrical portion, the cylindrical portion is sleeved and fixed on the inner tube wall of the blood vessel to be installed, a wing plate portion facing radially outward is disposed at the proximal end portion of the cylindrical portion, and the first clamping wall is connected to the wing plate portion.

Optionally, the wing plate portion is located radially outside the cylindrical portion and is axially abuttable against the proximal end portion of the cylindrical body.

Optionally, the blood vessel to be installed comprises a blood vessel body, a first stop member is arranged at the distal end part of the blood vessel body, a first adjusting member with adjustable assembling depth is connected to the cylinder wall of the cylinder body, and the part of the first adjusting member extending into the cylinder body can be matched with the first stop member to limit the position of the distal end part of the blood vessel to be installed in the cylinder body.

Optionally, the blood vessel to be installed comprises a blood vessel body, and the distal end part of the blood vessel body is provided with an abutting component for connecting the two blood vessels to be installed.

Optionally, the cutter further comprises a cutter bar, an outer wall of the cutter bar is provided with a blood blocking member, and the blood blocking member is in sliding sealing contact with an inner wall of the blood vessel to be installed.

Optionally, the cutting tool further comprises a tool bar, a second limiting member is arranged on an outer wall of the tool bar, a second adjusting member capable of adjusting the assembling depth is connected to the cylinder wall of the cylinder body, and a part of the second adjusting member extending into the cylinder body can be matched with the second limiting member to limit the position of the cutting tool in the cylinder body.

Optionally, the barrel is provided with a stroke limiting member, the cutter is provided with a second limiting component, the second adjusting member is in a state of releasing the cooperation with the second limiting member, and the stroke limiting member is used for cooperating with the second limiting component to limit the size of the cutter cutting into the main blood vessel.

Optionally, a stroke adjusting hole extending along the axial direction is formed in the cylinder wall of the cylinder, and the stroke limiting member is mounted in the stroke adjusting hole and can slide in the stroke adjusting hole.

Optionally, the tool also comprises an elastic resetting piece, and the elastic resetting piece is interacted with the tool and used for resetting the tool.

Optionally, the second limiting member is annular and sleeved outside the cutter bar; the elastic reset piece is arranged on the cutter bar and is used for fixing the axial end of the second limiting member.

Optionally, protective caps are detachably mounted at both axial ends of the cylinder.

Drawings

FIG. 1 is a schematic view of a combination device for vascular attachment provided in accordance with the present invention in an initial state;

FIG. 2 is a partial view of FIG. 1 at a right-hand viewing angle for showing the travel adjustment holes, the travel stop member, and the graduation marks;

FIG. 3 is a schematic view of the assembled device for vascular connection according to the present invention in a use state;

FIG. 4 is an enlarged view of a portion of the bit-to-latch member connection of FIG. 1;

FIG. 5 is a schematic view of the structure of the cutter;

FIG. 6 is a bottom view of FIG. 5;

FIG. 7 is a schematic structural view of a blood vessel to be installed;

FIG. 8 isbase:Sub>A cross-sectional view of one embodiment of FIG. 7 taken along line A-A;

FIG. 9 isbase:Sub>A cross-sectional view of the alternate embodiment of FIG. 7 taken along line A-A;

fig. 10 isbase:Sub>A cross-sectional view of the alternate embodiment of fig. 7 taken in the directionbase:Sub>A-base:Sub>A.

The reference numerals in fig. 1-10 are illustrated as follows:

1, a notch assembly, 11 barrels, 111 stroke limiting members, 112 stroke adjusting holes, 113 graduation marks, 12 cutters, 121 cutter heads, 121a necking grooves, 121b accommodating grooves, 121c puncturing needles, 121d cutting edges, 122 cutter bars, 122a blood blocking members, 122b second limiting members, 122c threaded holes, 13 first adjusting members, 14 second adjusting members, 15 elastic resetting pieces, 16 pressing pieces, 17 protective caps and 171 avoiding grooves;

2 blood vessel to be installed, 21 clamping components, 211 first clamping wall, 212 second clamping wall, 212a sub-wall, 213 connecting part, 214 clamping groove, 215 hemostatic component, 22 transition piece, 221 cylindrical part, 222 wing plate part, 23 first spacing component and 24 blood vessel body.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

As used herein, the term "plurality" refers to an indefinite plurality, usually more than two; and when the term "plurality" is used to indicate a quantity of a particular element, it does not indicate a quantitative relationship between such elements.

The terms "first," "second," and the like, herein are used for convenience in describing two or more structures or components that are identical or similar in structure and/or function and do not denote any particular limitation in order and/or importance.

Referring to fig. 1-10, fig. 1 is a schematic structural view of a combined device for vascular connection according to the present invention in an initial state; FIG. 2 is a partial view of FIG. 1 at a right-hand viewing angle for showing the travel adjustment holes, the travel stop member, and the graduation marks; FIG. 3 is a schematic structural view of a combination device for vascular access provided in accordance with the present invention in an in-use configuration; FIG. 4 is an enlarged view of a portion of the bit and shackle member connection of FIG. 1; FIG. 5 is a schematic view of the structure of the cutter; FIG. 6 is a bottom view of FIG. 5;

FIG. 7 is a schematic structural view of a blood vessel to be installed; FIG. 8 isbase:Sub>A cross-sectional view of one embodiment of FIG. 7 taken in the direction A-A; FIG. 9 isbase:Sub>A cross-sectional view of the alternate embodiment of FIG. 7 taken in the direction A-A;

As described in the background section, when a local lesion occurs in an arterial blood vessel or a venous blood vessel, a bypass blood vessel needs to be established to bypass the lesion and restore blood supply. For the convenience of distinction and description, an artery or vein vessel having a local lesion may be referred to as a main vessel (not shown), and the main vessel may be a vessel at any part of a subject such as a human body or other animal body, i.e., the kind of the main vessel is not limited herein.

The terms "distal" and "proximal" are used herein with reference to the position of a major blood vessel, and for any component, member or structure, the end (portion) thereof that is relatively close to the major blood vessel in use may be referred to as the proximal end (portion), and the end (portion) thereof that is relatively far from the major blood vessel in use may be referred to as the distal end (portion).

As shown in fig. 1-4, the present invention provides a combination device for vascular access, particularly access to a bypass vessel and a main vessel, either to overcome a localized diseased blockage of the main vessel or to address other conditions. The combined instrument comprises an incision component 1 and a blood vessel 2 to be installed, wherein the blood vessel 2 to be installed can be all of a bypass blood vessel or only a part of the bypass blood vessel, and particularly, refer to the description later.

The incision assembly 11 is used to perforate and incise the vessel wall of the main vessel to form an installation site for a bypass vessel, where the vessel 2 to be installed can be installed. The vessel 2 to be installed is typically a vascular prosthesis. The structural shape of the vessel 2 to be installed is not limited herein, and in the specific implementation, a person skilled in the art can determine the structural shape according to actual needs. For example, in the axial direction of the blood vessel body 24, the blood vessel body 24 may be a blood vessel with equal area, i.e. a blood vessel with the same flow area, such as a circular tube with equal diameter, an oval tube with equal size, etc., in which case, the cross section of the blood vessel body 24 perpendicular to the axial direction may be circular or oval; alternatively, in the axial direction of the blood vessel body 24, the blood vessel body 24 may also be a blood vessel with a variable area, that is, the flow area may be changed; still alternatively, the vessel body 24 may also be a complex structure including several branches.

In detail, the incision component 1 comprises a cylinder 11 and a cutter 12, the cutter 12 is arranged in the cylinder 11 and is slidably connected with the cylinder 11, and the blood vessel 2 to be installed is also arranged in the cylinder 11 and is externally sleeved on the cutter 12; the distal end part of the blood vessel 2 to be installed is detachably installed on the barrel body 11, the proximal end part of the blood vessel 2 to be installed is located at the proximal end part of the barrel body 1, the proximal end part of the blood vessel 2 to be installed is further provided with a clamping member 21, the clamping member 21 comprises a first clamping wall 211 and a second clamping wall 212 which are elastically connected, in an initial state, the second clamping wall 212 is clamped on the cutter 12, so that the second clamping wall 212 can be cut into the main blood vessel together with the cutter 12, in a use state, the cutter 12 can be separated from the cutter 12 due to displacement towards the interior of the main blood vessel, the second clamping wall 212 separated from the cutter 12 can be elastically overturned to be opposite to the first clamping wall 211, and at the moment, a clamping groove can be formed between the first clamping wall 211 and the second clamping wall 212 to clamp the blood vessel wall of the main blood vessel.

When the combined instrument provided by the invention is used, the incision of the cutter 12 in the vessel wall of the main vessel is controlled, and the cutter 12 is controlled to move towards the interior of the main vessel relative to the barrel body 11, so that the second clamping wall 212 can be separated from the cutter 12, the second clamping wall 212 can automatically rebound and turn over to be arranged opposite to the first clamping wall 211, and the vessel wall of the main vessel is clamped, so that the butt joint of the vessel 2 to be installed and the main vessel is completed.

Compared with the background technology, the combined instrument provided by the invention is simpler to use, has relatively lower requirements on the level of an operator, lower implementation difficulty, shorter operation time and smaller operation wound, can greatly simplify the operation procedure and is more favorable for reducing the pain of the operated person.

Specifically, as shown in fig. 1, in the initial state, the proximal end portion of the cutting tool 12 may have a portion protruding out of the barrel 11, and at least a part of the portion is the cutting head 121, and in use, the proximal end portion of the incision assembly 1 is directly controlled to be entirely close to the blood vessel wall of the main blood vessel until the proximal end portion of the barrel 11 contacts with the blood vessel wall of the main blood vessel, and the cutting head 121 may form an incision in the blood vessel wall of the main blood vessel.

The initial incision may be an incision that matches the engagement member 21, such that the size of the incision does not increase as the cutter 12 is subsequently pushed further towards the interior of the main vessel; alternatively, the size of the initial incision may be smaller than desired, and the size of the incision may be further enlarged as the cutter 12 is pushed further toward the interior of the main vessel. Both of the above-mentioned embodiments can be adopted in specific implementation, which is related to the structure of the cutting head 121, the structure of the portion of the proximal end of the cutter 12 protruding out of the cylinder 11, and the like.

In the version of the figures, as shown in fig. 1 and 5, the cutting head 121 may comprise equal-sized segments and tapered segments, where equal-sized segments refer to portions of which the shape and size of the cross section in the axial direction and perpendicular to the axial direction are not changed; the conical section is closer to the main vessel than the equal-sized section, and the apex of the conical section may be provided with a needle 121c. In making the incision, the lancet 121c can first be inserted into the vessel wall of the main vessel to position the knife 12. In an initial state, the equal-size section (the lower end of the equal-size section, namely the large-diameter end of the conical section) can be positioned outside the cylinder body 11, so that the equal-size section can be cut into the incision of the main blood vessel when the incision assembly 1 is pushed to integrally cut towards the main blood vessel; when the cutter 12 is subsequently pushed further along the cylinder 11 toward the inside of the main blood vessel, the size of the incision is not enlarged, and the pushing of the cutter 12 can be made easier.

It should be noted that, in addition to the structure of the cutter head 121 shown in the drawings, the cutter head 121 may also have other structures as long as the requirements regarding the shape, size, and the like of the notch can be satisfied, and for example, the cutter head 121 may be a bullet type as a whole.

Here, also referring to fig. 8-10, the cross section of the cutting head 121 perpendicular to the axial direction actually matches the cross sectional shape of the vessel body 24 of the vessel 2 to be installed: when the section of the blood vessel body 24 perpendicular to the axial direction is oval, the section of the cutter head 121 perpendicular to the axial direction can also be matched oval; when the section of the vessel body 24 perpendicular to the axial direction is circular, the section of the cutting head 121 perpendicular to the axial direction may also be a matching circle. It should be noted that the two exemplary matching relationships described above are actually established when the cutting head 121 cuts perpendicular to the vessel wall of the main vessel, and when the cutting head 121 cuts obliquely into the vessel wall of the main vessel, even if the cross section of the cutting head 121 perpendicular to the axial direction is circular, an oval-shaped cut can be formed.

The cutting head 12 may be provided with blades 121d for cutting the vessel wall of the main vessel, and the structural form and number of the blades 121d are not limited herein, and those skilled in the art can set the blades according to actual needs when implementing the method.

In the embodiment of the drawings, as shown in fig. 4-6, the blade 121d may have a blade portion with an arc-shaped contour to enhance cutting force; the extending direction of the cutting edge 121b may be substantially linear, and the arrangement direction of the cutting edge may be substantially in the radial direction; the number of the blades 121d may be plural and arranged at intervals in the circumferential direction; the projection of each cutting edge 121d in the cross section perpendicular to the axial direction is a first projection, the projection of the equal-size section in the cross section perpendicular to the axial direction is a second projection, and the first projections are all in the range of the second projections, namely, each cutting edge 121d does not protrude out of the outer wall surface of the equal-size section, so that the main blood vessel is prevented from being over-cut.

As can be seen from the foregoing, the tool 12 is provided with a clamping structure capable of clamping the second clamping wall 212, the clamping structure may be a separate component and then may be mounted on the tool 12 through a conventional mechanical connection manner, or may be a structure formed by the tool 12 itself, and the specific form of the clamping structure may be various as long as the requirements of use can be met.

In the embodiment of the drawings, as shown in fig. 3 to 5, the outer wall of the cutter 12 may be provided with a necking groove 121a extending along the axial direction, where the necking groove 121a refers to a structure with a small notch size and a large inner groove size, such as a dovetail groove, a T-shaped groove, an L-shaped groove, and the like; in the initial state, the second clamping wall 212 may be clamped in the necking groove 121a, and the groove wall of the necking groove 121a may block the second clamping wall 212 from automatically turning over.

In the above-described embodiment, since the necking grooves 121a are provided on the outer wall of the tool 12, the overall shape of the necking grooves 121a is actually related to the outer wall shape of the tool 12. If the portion of the tool 12 where the necking groove 121a is provided is the above-mentioned equal-sized segment, the extending direction of the necking groove 121a is approximately parallel to the central axis of the tool 12, and in the initial state, the second engaging wall 212 and the first engaging wall 211 may form an included angle of approximately 90 degrees (as shown in fig. 4); if the portion of the cutter 12 where the necking groove 121a is provided is the aforementioned tapered segment, the extending direction of the necking groove 121a may form an included angle greater than 90 degrees with the central axis of the cutter 12; alternatively, the necking grooves 121a may be partially located in the equal-sized section of the cutter 12, and partially located in the tapered section of the cutter 12.

Preferably, the entire throat groove 121a may be provided in the equal-sized section according to the embodiment of the present invention. Thus, when the cutter 12 is pushed into the main vessel, the engagement structure of the second engagement wall 212 and the constricted cavity 121a does not damp, and the cutter 12 can be pushed more smoothly.

Further, the upper end of the necking groove 121a is further communicated with an accommodating groove 121b which does not restrict the rotation of the second catching wall 212 and is used for accommodating a portion (hereinafter referred to as a connecting portion 213) connecting the first catching wall 211 and the second catching wall 212 and/or the second catching wall 212. In this way, the other parts of the clamping member 21 except the first clamping wall 211 can be limited in the cutter 12, and the influence of the clamping member 21 on the cutting of the main blood vessel by the cutter 12 can be reduced, so as to ensure the shape of the cut on the blood vessel wall of the main blood vessel.

Referring to fig. 4 and 5, the necking grooves 121a and the receiving grooves 121b are actually disposed on the outer wall of the cutter head 121.

As further shown in fig. 7, the clamping member 21 may further include a connecting portion 213 connecting the first clamping wall 211 and the second clamping wall 212; with this structure, when the second catching wall 212 is disengaged from the cutter 12, the catching member 21 may have a substantially U-shaped section in the axial direction with an outward opening. Of course, the above-mentioned connecting portion 213 may not be present, that is, the second clamping wall 212 and the first clamping wall 211 may also be directly connected; with this structure, when the second engagement wall 212 is disengaged from the cutter 12, the engagement member 21 may have a substantially V-shaped cross section in the axial direction with an outward opening.

The material of the engaging member 21 may be specifically a memory alloy, or may be other materials that can meet the use requirement.

With reference to fig. 8-10, the second chuck wall 212 may include a plurality of partition walls 212a arranged at intervals in the circumferential direction. In this way, the second catching wall 212 can be turned over relatively easily; these partition walls 212a may or may not be connected to each other. Correspondingly, the number of the necking grooves 121a may be plural, and in an initial state, the partition walls 212a may be engaged with the corresponding necking grooves 121a in a one-to-one correspondence. The number of the dividing wall 212a and the number of the necking grooves 121a are not limited herein.

The structural form of each partition 212a is not limited herein, and in implementation, a person skilled in the art may set the structural form according to actual needs. The surface of each partial wall 212a can be passivated to reduce the cutting ability of each partial wall 212a, so as to largely avoid the damage to the vessel wall of the main vessel when each partial wall 212a contacts with the vessel wall of the main vessel.

The first catching wall 211 may have a ring shape, differently from the second catching wall 212, so that the first catching wall 211 may cover the incision of the main vessel after the catching is completed. In fact, the first clamping wall 211 may also have a similar structure to the second clamping wall 212, which does not affect the connection of the clamping member 21 to the vessel wall of the main vessel.

Further, the clip member 21 may also be configured with a hemostatic member 215 to minimize bleeding. The hemostatic member 215 is a member for hemostasis in the medical field, such as a medical hemostatic felt, and the like, and may be attached to a side of the first clamping wall 211 opposite to the second clamping wall 212, so that the hemostatic felt may be located outside the main blood vessel and compress the incision after the blood vessel 2 to be installed is completely butted against the main blood vessel.

The blood vessel 2 to be installed may include a blood vessel body 24, and the aforementioned clamping member 21 is disposed at the proximal end portion of the blood vessel body 24, and the specific installation manner may be more selected as long as the reliable connection between the clamping member 21 and the blood vessel body 24 can be ensured.

With reference to fig. 7, the proximal end portion of the blood vessel 2 to be installed may be provided with a transition piece 22, the transition piece 22 may include a cylindrical portion 221, the cylindrical portion 221 may be fixed to the inner tubular wall of the blood vessel 2 to be installed in a sleeved manner, and the specific fixing manner may be interference fit or adhesion; the proximal end of the cylindrical portion 221 may be provided with a wing portion 222 extending radially outward, and the first clamping wall 211 may be connected to the wing portion 222 by bonding, welding, or the like, which also depends on the materials of the clamping member 21 and the transition piece 22.

Preferably, the flap portion 222 may also serve as a first stopper for the proximal portion of the blood vessel body 24 and the barrel 11, so as to limit the relative position between the proximal portion of the blood vessel body 24 and the barrel 11. Specifically, in the initial state, the flap portion 222 may axially abut against the proximal end portion of the cylinder 11, and the proximal end portion of the blood vessel body 24 may be limited to a position substantially corresponding to the proximal end portion of the cylinder 11, and the first engagement wall 211 connected to the flap portion 222 may be flush with the proximal end portion of the cylinder 11, or may protrude from the proximal end of the cylinder 11 appropriately, so that the first engagement wall 211 may contact the blood vessel wall of the main blood vessel when the cylinder 11 is operated to approach the main blood vessel. It should be noted that if the hemostatic member 215 is disposed on the first retaining wall 211, and actually contacts the wall of the main vessel, it is only necessary to ensure that the hemostatic member 215 properly protrudes from the proximal end of the barrel 11 or is flush with the proximal end of the barrel 11.

The structural form of the flap portion 222 may be various as long as the corresponding technical effect can be achieved. For example, the wing portion 222 may be a complete annular plate, or the wing portion 222 may include several circumferentially spaced sub-plates, each of which may be connected to the cylindrical portion 221.

As previously described, the distal end portion of the blood vessel 2 to be installed is detachably mounted in the cylinder 11. In practical applications, the distal end portion of the blood vessel 2 to be installed and the barrel 11 can be connected to maintain the installation state of the blood vessel 2 in the barrel 11 before the clamping member 21 is completely clamped with the main blood vessel. After the clamping member 21 is completely clamped with the main blood vessel, the connection state of the distal end part of the blood vessel 2 to be installed and the barrel body 11 can be released, and at the moment, the cutter 12, the barrel body 11 and the blood vessel 2 to be installed can be controlled to be separated.

The detachable connection mode can have more choices as long as the corresponding technical requirements can be met.

In the solution of the figures, as shown in fig. 1, 7, the distal end of the blood vessel 2 to be installed may be provided with a first stop member 23, the cylinder wall of the cylinder 11 being connected with a first adjustment member 13 of adjustable fitting depth; the fitting depth here refers to the insertion dimension in the radial direction of the cylinder 11. The portion of the first adjustment member 13 projecting into the barrel 11 is capable of axially cooperating with the first stop member 23 to define the position of the distal portion of the blood vessel 2 to be installed within the barrel 11, and when the stop cooperation therebetween needs to be released, only the fitting depth of the first adjustment member 13 needs to be adjusted.

In detail, the first adjusting member 13 may be a structural member that is screwed by a screw or the like to adjust the assembly depth, or the first adjusting member 13 may also be a structural member that is inserted by a spring pin or the like to adjust the assembly depth.

The creation of a bypass vessel requires the creation of two junctions with the main vessel, whereas the combination device provided by the present invention is only capable of completing the creation of one junction at a time. Thus, when the bypass blood vessel is established, two blood vessels 2 to be installed are actually required to be respectively arranged at two ends of the lesion part of the main blood vessel; the two vessels 2 to be installed can then be docked, i.e. the establishment of the bypass vessel can be completed.

Therefore, it is also necessary to provide an abutment member at the vessel 2 to be installed, which may in particular be provided at the distal end of the vessel body 24.

For the sake of simple structure, the docking member and the aforementioned first stop member 23 may be the same member, that is, the first stop member 23 may be used for docking two blood vessels 2 to be mounted, besides cooperating with the first adjustment member 13 to limit the axial displacement of the blood vessels 2 to be mounted relative to the cylinder 11. Specifically, the first limiting member 23 may be a buckle, and the two blood vessels 2 to be installed may be connected by the buckle.

Further, the cutter 12 may further include a cutter bar 122, and an outer wall of the cutter bar 122 may be provided with a blood blocking member (not shown in the drawings) which may be in sliding sealing contact with an inner wall of the blood vessel to be installed to reduce the amount of bleeding as much as possible. The specific structural form, material and the like of the blood blocking component are not limited as long as the requirements of use can be met.

As shown in fig. 1 and 3, the outer wall of the knife bar 122 may be provided with a second limiting member 122b, the cylinder wall of the cylinder 11 may be connected with a second adjusting member 14 capable of adjusting the assembling depth, and the second adjusting member 14 may be similar to the first adjusting member 13; likewise, the portion of the second adjustment member 14 that extends into the barrel 11 can cooperate with the second stop member 122b to define the position of the tool 12 within the barrel 11. The mounting position of the second limiting member 122b on the knife bar 122 is not limited herein, and in the embodiment of the drawings, as shown in fig. 1 and 3, the second limiting member 122b may be located at the distal end of the knife bar 122.

With such an arrangement, when the limit fitting of the second regulating member 14 and the second limit member 122b is not released, the cutter 12 cannot be displaced relative to the cylinder 11, the entire operation of the slitting assembly 1 can be conveniently performed, and the cutter 12 can be prevented from being erroneously touched; when the limit engagement of the second regulation member 14 with the second limit member 122b is released, the cutter 12 can be displaced relative to the cylinder 11 to perform a separate operation on the cutter 12.

The second stop member 122b may be provided with radially extending locating holes or the outer wall of the second stop member 122b may be provided with an annular groove for cooperating with the second adjustment member 14 to locate the tool 12.

For a subject such as a human body or other animal body, the inner diameter of the main blood vessel is relatively small, and even for an aortic blood vessel, the inner diameter is in the order of centimeters. Therefore, when the cutting tool 12 is operated to cut the wall of the main blood vessel and the cutting tool 12 is pushed further into the main blood vessel, care should be taken to avoid excessive damage to the main blood vessel caused by the cutting tool passing through the other side of the blood vessel wall.

In specific practice, the above situation can be controlled by fine operation of the operator, and at this time, the cylinder 11 can be provided with auxiliary judgment structures such as scale marks 113 for prompting the operator of the displacement distance of the cutter 12 relative to the cylinder 11.

Alternatively, the stroke stopper 111 may be provided in the cylinder 11, and the cutter 12 may be provided with a second stopper. In the released state of the second adjustment member 14 and the second stop member 122b, the travel stop member 111 can cooperate with the second stop component to limit the size of the incision of the tool 12 into the main blood vessel, thereby preferably preventing the tool 12 from penetrating the main blood vessel. To simplify the structure, the second stop feature may be the same as the second stop member 122b described above.

The travel stop member 111 may be a separate component that may then be mounted within the barrel 11 by mechanical attachment, such as by threading, welding, snapping, bonding, and the like, as shown in fig. 2 and 3. Further, the mounting position of the stroke limiting member 111 can also be adjusted so as to adjust the propelling amount of the cutter 12 for main blood vessels with different inner diameters; specifically, a stroke adjustment hole 112 extending in the axial direction may be provided in the cylinder 11, the stroke stopper 111 may slide in the stroke adjustment hole 112, and a scale 113 may be provided on one side of the stroke adjustment hole 112 to assist in determining the installation position of the stroke stopper 111.

Alternatively, the stroke limiting member 111 and the barrel 11 may be of an integral structure, for example, the stroke limiting member 111 may be a limiting boss formed by the inner wall of the barrel 11 protruding radially inward. In this way, the amount of advance of the tool 12 may also be limited. In this embodiment, the structural form of the travel limiting member 111 may also be selected; for example, it may be annular, or it may be a single or a plurality of circumferentially spaced projections provided on the inner wall of the barrel 11.

Further, an elastic return member 15 may be included, which elastic return member 15 may interact with the tool 12 for return of the tool 12. In this way, after completing the connection of the vessel 2 to be mounted to the main vessel, the cutter 12 is automatically displaced away from the interior of the main vessel by the elastic return member 15.

The elastic restoring member 15 is not limited in kind, and may be an elastic member in various forms such as a spring, an elastic block, a tension rope, etc., as long as the corresponding function can be achieved. Taking a spring as an example, the elastic restoring member 15 may be sleeved on the knife bar 122 of the knife 12, one end of the elastic restoring member 15 may interact with the second limiting member 122b, and the other end of the elastic restoring member may interact with the inner wall of the cylinder 11 (the inner wall of the cylinder 11 may extend radially inward to form a supporting member of the spring), when the knife 12 moves toward the interior of the main blood vessel relative to the cylinder 11, the accumulated elastic deformation of the elastic restoring member 15 may increase, so that when the operator releases the operating force on the knife 12, the accumulated elastic deformation of the elastic restoring member 15 may be released to drive the knife 12 to restore; the elastic deformation may be compressive deformation or tensile deformation, and is specifically related to the installation position of the elastic restoring member 15.

The second stop member 122b and the knife bar 122 may be an integral structure.

Or, the second limiting member 122b and the knife bar 122 may also be separately provided, and then assembled; the mounting manner of the second limiting member 122b and the knife bar 122 can be various as long as the requirement of use can be satisfied. In an exemplary scheme, as shown in fig. 1 and fig. 3, the second limiting member 122b may be annular, and is sleeved on the knife bar 122, and may further include a pressing element 16, the pressing element 16 may be mounted on the knife bar 122, and the pressing element 16 and the elastic resetting element 15 may respectively interact with two axial ends of the second limiting member 122b, so as to position the mounting position of the second limiting member 122b relative to the knife bar 122.

The pressing member 16 may be embodied as a screw-like member comprising a head portion and a shaft portion, which may be provided with an external thread, the knife bar 122 may be provided with a threaded hole 122c. The pressing piece 16 may be screwed to the knife bar 122 through the shaft portion and presses the second stopper member 122b through the head portion.

The protective caps 17 are detachably mounted at both axial ends of the barrel 11, and the detachable connection mode can be a threaded connection or a certain degree of interference fit. In use, the protective caps 17 at both ends of the barrel 11 can be removed first. The protective cap 17 may be made of a transparent material or a non-transparent material.

Referring to fig. 1, if the protective cap 17 is extended to cover the second adjustment member 14, the stroke limiting member 111, the second adjustment member 14, the stroke limiting member 111 may interfere with the installation of the protective cap 17. At this time, the protective cap 17 may be provided with an escape groove 171 to escape the second regulation member 14 and the stroke stopper 111.

The embodiment of the present invention does not limit the assembling process of the above-mentioned combination device, and the assembling process can be performed in various orders during the actual assembling process, as long as the finally formed product can meet the requirements of use, and the following embodiment of the present invention exemplarily provides an assembling step.

1) Installing the blood vessel 2 to be installed in the barrel body 11, axially abutting against the proximal end of the barrel body 11 through the wing plate part 222, straightening the blood vessel 2 to be installed, and matching with the first limiting member 23 through the first adjusting member 13 to limit the position of the distal end part of the blood vessel 2 to be installed;

2) Sleeving a cutter 12 in the cylinder body 11 and the blood vessel 2 to be installed from bottom to top, and then installing an elastic resetting piece 15, a second limiting member 122b and a pressing piece 16;

3) Clamping the second clamping wall 212 of the clamping member 21 to the tool 12;

4) Mounting the second adjustment member 14 such that the second adjustment member 14 can cooperate with the tool 12 to define the position of the tool 12 relative to the barrel 11;

5) Protective caps 17 are provided at both axial ends of the cylinder 11, respectively.

With respect to the combination device according to the above embodiments, the following embodiments of the present invention can also briefly describe the operation steps thereof.

1) Removing the protective cap 17 at the proximal end of the barrel 11, manipulating the barrel 11 to close the vessel wall of the main vessel and piercing the main vessel with the cutting head 121 until the hemostatic member 215 of the clamping member 21 contacts the vessel outer wall of the main vessel;

it should be noted that the direction in which the tool 12 cuts into the main vessel may be a vertical cut or an oblique cut, and both of these options may be adopted.

2) Removing the protective cap 17 from the distal end portion of the barrel 11, releasing the axial position-limiting engagement of the second regulating member 14 and the second position-limiting member 122b, pushing the cutter 12 toward the inside of the main blood vessel until the second catching wall 212 is released from catching the cutter 12, and rotating the second catching wall 212 to be disposed opposite to the first catching wall 211 to thereby pinch the vessel wall of the main blood vessel;

in this process, the stroke limiting member 111 serves to limit the amount of advance of the tool 12; the elastic deformation of the elastic restoring member 15 is increased, and when the force of the operator operating the cutter 12 is released, the elastic deformation of the elastic restoring member 15 can be released to drive the cutter 12 to gradually separate from the main blood vessel.

3) The axial limit matching of the first adjusting member 13 and the first limit member 23 is released, the cylinder body 11 and the cutter 12 are synchronously and slowly pulled out, when the blood vessel 2 to be installed is exposed out of the cylinder body 11, the blood vessel 2 to be installed is clamped by a blood vessel clamp to prevent blood from flowing out, and then the cylinder body 11 and the cutter 12 are completely pulled out;

4) Repeating the steps 1) -3), and connecting the other end of the main blood vessel lesion part with another blood vessel 2 to be installed;

5) And fully exhausting the gas in the two blood vessels 2 to be installed, and enabling the blood in the blood vessels 2 to be installed to flow to the corresponding distal end parts of the blood vessels 2 to be installed, and rapidly butting the two blood vessels 2 to be installed by utilizing the first limiting component 23 so as to complete the establishment of the bypass blood vessels.

It should be noted that the combined instrument provided by the present invention may be used under an open chest condition, or may be used in a minimally invasive interventional operation, that is, the implementation scenario of the combined instrument provided by the present invention is not limited; in addition, the materials used by each component in the combined instrument provided by the invention are medical functional materials harmless to human tissues and blood, so that the materials and the operated person are prevented from generating resistance.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.

Claims

1. A combination instrument for connecting blood vessels, which comprises an incision assembly (1) and a blood vessel (2) to be installed, wherein the incision assembly (1) comprises a barrel (11) and a cutter (12), the cutter (12) is arranged in the barrel (11) and is in sliding connection with the barrel (11), the blood vessel (2) to be installed is also arranged in the barrel (11) and is sleeved outside the cutter (12), the distal end part of the blood vessel (2) to be installed is detachably installed on the barrel (11), the proximal end part of the blood vessel (2) to be installed is located at the proximal end part of the barrel (11), the proximal end part of the blood vessel (2) to be installed is provided with a clamping member (21), and the clamping member (21) comprises a first clamping wall (211) and a second clamping wall (212) which are elastically connected;

in an initial state, the second clamping wall (212) is clamped on the cutter (12), so that the second clamping wall (212) can cut into a main blood vessel along with the cutter (12), in a use state, the cutter (12) can move towards the interior of the main blood vessel to enable the second clamping wall (212) to be separated from the cutter (12), the second clamping wall (212) separated from the cutter (12) can elastically rotate to be arranged opposite to the first clamping wall (211), and the oppositely arranged first clamping wall (211) and the second clamping wall (212) can clamp the blood vessel wall of the main blood vessel.

2. Combined device for vascular attachment, according to claim 1, characterized in that the outer wall of the knife (12) is provided with an axially extending necking groove (121 a), the second catching wall (212) initially jamming in the necking groove (121 a).

3. Combined instrument for vascular access according to claim 2, characterized in that the cutter (12) comprises a cutting head (121), the notch (121 a) being provided on the outer wall of the cutting head (121).

4. A combined device for vascular access according to claim 2, wherein the second engagement wall (212) comprises a plurality of division walls (212 a) arranged at intervals along the circumferential direction, the number of the notch grooves (121 a) is multiple, and in the initial state, each division wall (212 a) is engaged in the corresponding notch groove (121 a) in a one-to-one correspondence.

5. A combined device for vascular access according to claim 2, wherein the upper end of the constriction groove (121 a) is further connected to a receiving groove (121 b) which does not restrict the rotation of the second catching wall (212) and is used for receiving the second catching wall (212) and/or the portion connecting the first catching wall (211) and the second catching wall (212).

6. Combination device for vascular connection according to claim 1, characterized in that the snap-in member (21) is provided with a hemostatic means (215).

7. Combination device for vascular access according to claim 1, wherein the cutter (12) comprises a cutting head (121), the cutting head (121) having, in an initial state, a portion protruding beyond the proximal end of the barrel (11), the proximal end of the cutting head (121) being provided with a spike (121 c) and a cutting edge (121 d).

8. Combined device for vascular connection according to any of claims 1-7, wherein the vessel (2) to be installed comprises a vessel body (24), the proximal end of the vessel body (24) is provided with a transition piece (22), the transition piece (22) comprises a cylindrical portion (221), the cylindrical portion (221) is fixed to the inner wall of the vessel (2) to be installed in a sleeved manner, the proximal end of the cylindrical portion (221) is provided with a wing portion (222) extending radially outwards, and the first clamping wall (211) is connected with the wing portion (222).

9. Combined instrument for vascular connection according to claim 8, characterized in that said flap portion (222) is radially external to said cylindrical portion (221) and is axially abuttable against a proximal portion of said barrel (11).

10. Combined instrument for vascular connection according to any of claims 1 to 7, characterised in that the vessel (2) to be installed comprises a vessel body (24), the distal end of the vessel body (24) being provided with a first stop member (23), the cylindrical wall of the cylinder (11) being connected with a first adjustment member (13) of adjustable fitting depth, the portion of the first adjustment member (13) projecting into the cylinder (11) being able to cooperate with the first stop member (23) to define the position of the distal end of the vessel (2) to be installed inside the cylinder (11).

11. Combined instrument for vascular connection according to any of the claims 1-7, wherein the vessel (2) to be installed comprises a vessel body (24), the distal part of the vessel body (24) being provided with an abutment member for connection of two vessels (2) to be installed.

12. Combined instrument for vascular access according to any one of claims 1-7, characterised in that the knife (12) further comprises a knife bar (122), the outer wall of the knife bar (122) being provided with a blood blocking member in sliding sealing contact with the inner wall of the vessel (2) to be installed.

13. Combined instrument for vascular connection according to any one of claims 1 to 7, characterised in that the knife (12) further comprises a knife bar (122), the outer wall of the knife bar (122) is provided with a second stop member (122 b), the cylindrical wall of the cylindrical body (11) is connected with a second adjustment member (14) with adjustable fitting depth, and the part of the second adjustment member (14) extending into the cylindrical body (11) can cooperate with the second stop member (122 b) to define the position of the knife (12) in the cylindrical body (11).

14. Combination device for vascular access according to claim 13, wherein the barrel (11) is provided with a travel stop member (111), the cutter (12) is provided with a second stop element, the second adjustment member (14) is in a disengaged condition with the second stop member (122 b), the travel stop member (111) is adapted to cooperate with the second stop element to limit the size of the incision of the cutter (12) into the main vessel.

15. Combination device for vascular access according to claim 14, wherein the cylindrical wall of the barrel (11) is provided with an axially extending stroke adjustment hole (112), the stroke stop member (111) being mounted in the stroke adjustment hole (112) and being slidable in the stroke adjustment hole (112).

16. Combined device for vascular access according to claim 13, further comprising an elastic return member (15), the elastic return member (15) interacting with the knife (12) for the return of the knife (12).

17. A combination according to claim 16, wherein the second stop member (122 b) is ring-shaped and fits over the knife bar (122);

the tool comprises a cutter bar (122), and is characterized by further comprising a pressing piece (16), wherein the pressing piece (16) is installed on the cutter bar (122), the pressing piece (16) and the elastic resetting piece (15) are respectively acted with two axial ends of the second limiting member (122 b) so as to position the installation position of the second limiting member (122 b) relative to the cutter bar (122).

18. Combined device for vascular connection according to any of claims 1-7, characterised in that the cartridge (11) is detachably fitted with a protective cap (17) at both axial ends.