Vascular shunt plug fixing device for field trauma
By designing an adaptively adjustable vascular shunt plug fixation device, the problem that the shunt plug length cannot adapt to the spacing of vascular injuries is solved, stable fixation and smooth blood flow are achieved, thrombosis and bleeding are avoided, and it is suitable for field trauma rescue.
Patent Information
- Application Number
- CN202511187169.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-25
- Publication Date
- 2025-10-10
AI Technical Summary
In the existing technology, the length specifications of shunt plugs are fixed and cannot adapt to the differences in the location of blood vessel damage and the distance between the broken ends in the human body. Especially in a field environment, a shunt plug that is too long or too short may cause thrombosis or fall off, and cannot effectively bridge the broken ends, leading to limb necrosis or bleeding.
A vascular shunt embolization fixation device for field trauma was designed. It includes a coaxially arranged first embolization cap, an intermediate tube, and a second embolization cap. The length of the intermediate tube is adjusted by an expansion net and an expansion balloon. Memory alloy material is used to ensure implant stability. A magnetic block and a rotating tube are combined to achieve length fixation and ensure smooth blood flow.
It achieves shunt plug fixation with different spacings adapted to the condition of vascular injury, ensures mechanical stability and hemodynamic performance, allows for rapid implantation and simplified recovery and arrangement, and avoids thrombosis and shedding.
Smart Images
Figure CN120753714A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of shunt plugs, and in particular relates to a vascular shunt plug fixing device for field trauma. Background Art
[0002] In field emergency and disaster relief, severe vascular injury is one of the main causes of death or disability for the wounded. When large blood vessels, such as arteries or major veins, are broken or ruptured, rapid restoration of blood flow is crucial to avoiding tissue ischemia and necrosis. Traditional hemostasis methods such as pressure bandages or tourniquets can temporarily control bleeding, but they will completely block distal blood flow. Prolonged ischemia may lead to limb necrosis or even amputation. Therefore, vascular shunt technology has emerged. Its core is to temporarily implant shunt plugs upstream and downstream of damaged blood vessels to establish a bypass channel, maintain smooth blood flow, and buy time for subsequent surgical repair. In the existing technology, the length specifications of shunt plugs are usually fixed, but the location of blood vessel damage and the distance between the broken ends vary greatly in the human body. Especially in a field combat environment, the distance between the broken ends of the blood vessels may change due to muscle contraction, tissue swelling or external force. For example, after a femoral artery injury, the distance between the broken ends can be retracted up to 3-5 cm, while a carotid artery injury may only require a 1-2 cm shunt plug. A shunt plug that is too long may bend into an angle, causing turbulence and thrombosis; a shunt plug that is too short cannot effectively bridge the broken ends, causing them to fall off or oozing blood. Summary of the Invention
[0003] In view of this, the purpose of the present invention is to provide a vascular shunt plug fixation device for field trauma, which can adapt to different spacings according to the condition of vascular damage, while ensuring mechanical stability and hemodynamic performance after implantation.
[0004] In order to achieve the above object, the present invention provides the following technical solutions: The closure of the present invention is a blockage of the first and second closure caps, wherein the closure is adapted to engage the first and second closure caps, and the closure is adapted to engage the second and second closure caps, respectively.
[0005] Furthermore, the quick-release connector includes an inner tube, an outer tube, and a connecting tube that are coaxially connected. The inner tube, the outer tube, and the connecting tube are all made of soft materials. One end of the inner tube is fixed to the inner side of the guide wire, and the other end of the inner tube is elastically crimped to one end of the outer tube. The other end of the outer tube is fixedly connected to the connecting tube, and the connecting tube is connected to the inflation airbag. A baffle is installed on the inner side of the middle part of the connecting tube, and an air hole is opened on the baffle.
[0006] Furthermore, a first magnetic stop is installed on the outside of the outer tube, and a second magnetic stop corresponding to the first magnetic stop is installed in the channel near the channel entrance. The inner diameter of the second magnetic stop is smaller than the outer diameter of the first magnetic stop, and the second magnetic stop can be used to limit the first magnetic stop.
[0007] Furthermore, the second magnetic stopper is coaxially fixedly connected to a rotating tube, which is threadedly connected to the channel. One end of the rotating tube away from the second magnetic stopper is located outside the channel, and the position of the second magnetic stopper in the channel can be moved by rotating the rotating tube.
[0008] Furthermore, longitudinal grooves are formed on the inner sides of the first bolt cap and the second bolt cap, and the longitudinal grooves are evenly spaced along the circumference. A first protrusion that cooperates with the longitudinal grooves is formed on the outer side of the intermediate tube.
[0009] Furthermore, the expansion net includes several groups of net rings evenly spaced along the axial direction. The net rings are formed by a broken line along the circumferential direction, and each group of net rings is connected together by a longitudinal line; an elastic sealing ring is fixedly connected to the outside of the expansion net, and a second protrusion corresponding to the longitudinal slide groove is formed on the elastic sealing ring.
[0010] Furthermore, arc-shaped support plates are arranged at intervals along the radial direction on the inner side of the expansion net, the arc-shaped support plates are connected to the longitudinal lines through support rods, and the expansion airbags are installed on the inner side of the arc-shaped support plates.
[0011] Furthermore, a screw is fixedly connected to the inner side of the elastic sealing ring, and a connection hole for connecting the screw is opened on the expansion net.
[0012] Furthermore, a cavity is formed on the inner side of the elastic sealing ring, and a guide tube is installed on the end face of the elastic sealing ring facing the middle tube. The guide tube is connected to the cavity and is evenly distributed on the end face of the elastic sealing ring along the circumferential direction. The guide tube is connected to a support airbag, which is used to support the end face of the middle tube after expansion.
[0013] The beneficial effects of the present invention are: The present invention discloses a field trauma vascular shunt plug fixing device. By slidingly setting an intermediate tube between a first plug cap and a second plug cap, the length between the two plug caps can be timely adjusted when connecting the blood vessel and the shunt plug. This allows the shunt plug fixing device of the present invention to adapt to different spacings according to the condition of the blood vessel damage, adapt to the installation needs of different sites, and at the same time ensure mechanical stability and hemodynamic performance after implantation.
[0014] In the device disclosed in the present invention, after the length of the shunt plug is determined, the airbag can be inflated, and the two ends of the middle tube can be pressed against the first plug cap and the second plug cap respectively through the expansion net, thereby achieving length fixation. The structure is stable in operation, simple to operate, and can be installed and fixed quickly. It does not require other complex connection structures, and it also facilitates postoperative recovery and sorting work.
[0015] Other advantages, objectives and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be achieved through the following description. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to make the purpose, technical solutions and beneficial effects of the present invention more clear, the present invention provides the following drawings for illustration: Figure 1 It is a structural schematic diagram of the shunt plug fixing device; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 This is a schematic diagram of the airbag after retraction; Figure 4 for Figure 3 Enlarged view of point B in the middle; Figure 5 is a cross-sectional view of a shunt plug fixing device; Figure 6 for Figure 5 Enlarged view of point C in the middle; Figure 7 Schematic diagram of the structure of the expansion network; Figure 8 Schematic diagram of the structure of the arc support plate; Figure 9 It is a structural diagram of the quick connector.
[0017] The markings in the accompanying drawings are as follows: first bolt cap 1, middle tube 2, second bolt cap 3, expansion net 4, expansion airbag 5, guide wire 6, channel 7, inflation device 8, channel entrance 9, channel exit 10, inner tube 11, outer tube 12, connecting tube 13, baffle 14, first magnetic stopper 15, second magnetic stopper 16, rotating tube 17, longitudinal slide groove 18, first protrusion 19, mesh ring 20, longitudinal line 21, elastic sealing ring 22, second protrusion 23, arc-shaped support plate 24, support rod 25, connecting hole 26, cavity 27, guide tube 28, support airbag 29, and limit plate 30. DETAILED DESCRIPTION
[0018] like Figures 1 to 9 As shown, the disclosed field trauma vascular shunt closure device comprises a coaxially arranged first cap 1, an intermediate tube 2, and a second cap 3. The first cap 1 and the second cap 3 have identical appearances, differing from each other in that the second cap 3 has a channel 7 disposed inside. The first cap 1, the intermediate tube 2, and the second cap 3 are all made of a soft material, such as silicone. The outer diameter of the intermediate tube 2 matches the inner diameters of the first and second caps 1 and 3, respectively. The ends of the intermediate tube 2 are slidably mounted inside the first and second caps 1 and 3, respectively. When the intermediate tube 2 and the first or second cap 1 or 3 are moved relative to each other, the frictional contact between the flexible materials maintains the relative position of the tubes. It is understood that to prevent the intermediate tube 2 from dislodging from the first or second cap 1 or 3, retaining rings are provided on opposing ends of the first and second caps 1 and 3 to retain the first protrusion 19 of the intermediate tube 2.
[0019] Furthermore, in the present invention, an expansion net 4 is installed on the inner side of the intermediate tube 2. Initially, the expansion net 4 is in a contracted state. An expansion airbag 5 is provided on the inner side of the expansion net 4. The expansion airbag 5 is connected to one end of a guide wire 6 through a quick-release joint. The other end of the guide wire 6 passes through a channel 7 provided on the second bolt cap 3 and is connected to an inflation device 8. The inflation device 8 can inflate the airbag through the hollow guide wire 6. The expansion net 4 is made of a memory alloy material. After the expansion airbag 5 is inflated, it can drive the expansion net 4 to expand. The expansion net 4 can press the two ends of the intermediate tube 2 against the first bolt cap 1 and the second bolt cap 3 respectively. By pushing or pulling the guide wire 6, the guide wire 6 can drive the quick-release joint to move in the channel 7, so that the position of the airbag in the expansion net 4 can be easily adjusted. Among them, the two ends of the channel 7 respectively form a channel entrance 9 and a channel exit 10. The guide wire 6 enters from the channel entrance 9, passes through the channel 7, and exits through the channel exit 10. After exiting, it bends backward into the expansion net 4. The channel entrance 9 is located on the end face of the second bolt cap 3 facing the first bolt cap 1, and the channel exit 10 is located on the inner wall of the second bolt cap 3 away from the intermediate tube 2.
[0020] The operating principle and process of the device of the present invention are as follows: Before use, the first and second caps 1 and 3 are coaxially sleeved on either end of the intermediate tube 2. A guidewire 6 passes through a channel 7 and connects to an expansion balloon 5 within an expansion net 4. During use, the first and second caps 1 and 3 are placed in two blood vessels, and the intermediate tube 2 is slid to continuously adjust the length of the shunt plug to suit the vessel damage. This prevents the caps from being too long and causing the vessel to tilt, or from being too short and failing to effectively bridge the broken ends, leading to detachment or bleeding. After the length is adjusted to suit, the inflation device 8 is activated, inflating the expansion balloon 5 via the guidewire 6. Once inflated, the expansion balloon 5 drives the expansion net 4 to expand. The expansion net 4 presses the two ends of the intermediate tube 2 against the first and second caps 1 and 3, respectively. After expansion, the first and second caps 1 and 3 also press against the inner walls of the two blood vessels, thereby determining the length of the shunt plug. The expansion net 4 is made of a memory alloy and can remain inflated after expansion. The inflatable balloon 5 is deflated via a guidewire 6. After deflation, the balloon is withdrawn from the intermediate tube 2 via the guidewire 6 to avoid disrupting blood flow. The present invention utilizes a coaxially arranged first cap 1, intermediate tube 2, and second cap 3, combined with an expansion mesh 4 and an inflatable balloon 5. Inflation of the balloon 5 drives the expansion mesh 4 to expand, tightly crimping the ends of the intermediate tube 2 within the cap. This creates a stable frictional fixation, preventing displacement caused by blood flow impact and achieving rapid implantation and stable fixation of the vascular shunt plug.
[0021] The present invention provides an intermediate tube 2 that is slidably arranged between the first cap 1 and the second cap 3, so that the length between the two caps can be adjusted in time when the blood vessel and the shunt plug are connected, so that the shunt plug fixing device of the present invention can adapt to different spacings according to the condition of blood vessel damage.
[0022] In this embodiment, the quick-release connector includes a coaxially connected inner tube 11, an outer tube 12, and a connecting tube 13. The inner tube 11, the outer tube 12, and the connecting tube 13 are all made of soft materials. The air in the guide wire 6 can enter the airbag through the inner tube 11, the outer tube 12, and the connecting tube 13 in sequence. The airbag and the connecting tube 13 are sealed by gluing. One end of the inner tube 11 is fixed to the inner side of the guide wire 6, and the other end of the inner tube 11 is elastically pressed onto one end of the outer tube 12. The inner tube 11 is elastically pressed into the outer tube 12 to form an interference fit, ensuring stable force transmission between the guide wire 6 and the airbag and preventing disengagement during inflation. The other end of the outer tube 12 is fixedly connected to the connecting tube 13, and the connecting tube 13 is connected to the inflatable airbag 5. A baffle 14 is installed on the inner side of the middle part of the connecting tube 13, and a vent hole is opened on the baffle 14. The baffle 14 is provided to limit the expansion airbag 5 . The expansion airbag 5 is blocked at the edge of the baffle 14 , which can seal the channel 7 and prevent blood from overflowing.
[0023] In the embodiment, the outer side of the outer tube 12 is provided with a first magnetic stopper 15. It can be understood that the diameter of the channel 7 should be large enough to facilitate the passage of the first magnetic stopper 15. A second magnetic stopper 16 corresponding to the first magnetic stopper 15 is arranged in the channel 7 near the channel inlet 9. The inner diameter of the second magnetic stopper 16 is smaller than the outer diameter of the first magnetic stopper 15. The second magnetic stopper 16 can be used to limit the first magnetic stopper 15. The inner diameter of the second magnetic stopper 16 is smaller than the outer diameter of the first magnetic stopper 15, forming a mechanical stop to ensure that the joint moves only within a set range. By using the magnetic block connection method, the position of the outer tube 12 can be fixed, ensuring the stability of the device during use.
[0024] In the embodiment, the second magnetic stopper 16 is coaxially fixedly connected with a rotating tube 17. The rotating tube 17 is threadedly connected with the channel 7. The end of the rotating tube 17 away from the second magnetic stopper 16 is located outside the channel 7. The position of the second magnetic stopper 16 in the channel 7 can be moved by rotating the rotating tube 17. The rotating tube 17 can facilitate cleaning and replacement of the internal structure. Specifically, when the outer tube 12 and the inflatable air bag 5 need to be removed, the rotating tube 17 is rotated to move it towards the outside. The second magnetic stopper 16 moves together with the first magnetic stopper 15 connected thereto. This can facilitate subsequent cleaning of the pipeline and can achieve reuse.
[0025] In the embodiment, the inner side of the first and second plug caps 1 and 3 is provided with a longitudinal sliding groove 18. The longitudinal sliding grooves 18 are uniformly and spacedly distributed along the circumference. The outer side of the middle tube 2 is provided with a first protrusion 19 matched with the longitudinal sliding groove 18. By arranging the first protrusion 19, stable sliding can be achieved while avoiding rotation of the middle tube 2 during length adjustment of the shunt, making the length adjustment more stable. The close cooperation of the protrusion and the sliding groove can reduce the risk of blood leakage from the gap between the plug cap and the middle tube 2. When the inflatable mesh 4 is compressed, the protrusion is further deformed to fill the gap, forming a secondary seal.
[0026] In the embodiment, the inflatable mesh 4 includes a plurality of groups of mesh rings 20 uniformly and spacedly arranged along the axial direction. The mesh rings 20 are formed by a fold line along the circumferential direction. The groups of mesh rings 20 are connected together by longitudinal lines 21. The outer side of the inflatable mesh 4 is fixedly connected with an elastic sealing ring 22. The elastic sealing ring 22 is formed with a second protrusion 23 corresponding to the longitudinal sliding groove 18. By arranging the elastic sealing ring 22, the gap between the middle tube 2 and the plug cap can be sealed to prevent blood from spilling, further achieving sealing.
[0027] In this embodiment, arc-shaped support plates 24 are provided at radial intervals on the inner side of the expansion net 4. The arc-shaped support plates 24 are connected to the longitudinal line 21 through support rods 25, and the expansion airbag 5 is installed on the inner side of the arc-shaped support plates 24. By providing the arc-shaped support plates 24, the expansion airbag 5 can be supported after expansion, preventing the expansion airbag 5 from filling the entire expansion net 4 during the process of applying force to the expansion net 4, thereby providing a certain space for blood flow and preventing blood blockage. The support plates prevent the intermediate tube 2 from partially collapsing when the airbag is expanded, ensuring that the blood flow channel 7 is always unobstructed. A limiting plate 30 is provided on the inner side of the arc-shaped support plate 24. When the expansion net 4 is in a contracted state, each limiting plate 30 is combined to limit the first magnetic stopper 15 axially and radially to define the initial position of the airbag. The center hole formed by the combination of the limiting plates 30 can allow the guide wire 6 to pass through.
[0028] In this embodiment, screws are fixedly connected to the inner side of the elastic sealing ring 22, and connection holes 26 for connecting the screws are provided in the expandable mesh 4, facilitating installation of the elastic sealing ring 22. The radial locking of the screws resists blood flow shear forces, preventing the sealing ring and mesh 20 from separating due to long-term pulsating shocks, and also preventing the elastic sealing ring 22 from separating from the expandable mesh 4 after expansion and compression.
[0029] In this embodiment, a cavity 27 is formed on the inner side of the elastic sealing ring 22, and a guide tube 28 is installed on the end face of the elastic sealing ring 22 facing the intermediate tube 2. The guide tube 28 is connected to the cavity 27. The guide tubes 28 are evenly distributed on the end face of the elastic sealing ring 22 along the circumferential direction. The guide tube 28 is connected to a support airbag 29. After expansion, the support airbag 29 is used to support the end face of the intermediate tube 2 and can locate the longitudinal position of the intermediate tube 2. When the blood vessel spasms, etc., it can also ensure that the position of the intermediate tube 2 is not changed, thereby increasing the stability of the device during use.
[0030] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.
Claims
1. A vascular shunt plug fixation device for field trauma, characterized by: The cam is adapted to engage said first and second end caps, wherein the cam is adapted to engage said second and second end caps, wherein the cam is adapted to engage said second and second end caps, wherein the cam is adapted to engage said second and second end caps, wherein the cam is adapted to engage said second and second end caps, wherein the cam is adapted to engage said second and second end caps, wherein the cam is adapted to engage said second and second end caps, 2. The field trauma vascular shunt plug fixation device according to claim 1, characterized in that: The quick-release connector includes an inner tube, an outer tube, and a connecting tube that are coaxially connected. The inner tube, the outer tube, and the connecting tube are all made of soft materials. One end of the inner tube is fixed to the inner side of the guide wire, and the other end of the inner tube is elastically crimped to one end of the outer tube. The other end of the outer tube is fixedly connected to the connecting tube, and the connecting tube is connected to the expansion airbag. A baffle is installed on the inner side of the middle part of the connecting tube, and an air vent is opened on the baffle.
3. The field trauma vascular shunt plug fixation device according to claim 2, characterized in that: A first magnetic stopper is installed on the outside of the outer tube, and a second magnetic stopper corresponding to the first magnetic stopper is installed in the channel near the channel entrance. The inner diameter of the second magnetic stopper is smaller than the outer diameter of the first magnetic stopper, and the second magnetic stopper can be used to limit the first magnetic stopper.
4. The field trauma vascular shunt plug fixation device according to claim 3, characterized in that: The second magnetic stopper is coaxially fixedly connected to a rotating tube, which is threadedly connected to the channel. One end of the rotating tube away from the second magnetic stopper is located outside the channel. The position of the second magnetic stopper in the channel can be moved by rotating the rotating tube.
5. The field trauma vascular shunt plug fixation device according to any one of claims 1 to 4, characterized in that: The first bolt cap and the second bolt cap are provided with longitudinal slots on their inner sides. The longitudinal slots are evenly spaced along the circumference. The outer side of the intermediate tube is provided with first protrusions that match the longitudinal slots.
6. The field trauma vascular shunt plug fixation device according to claim 5, characterized in that: The expansion net includes several groups of net rings evenly spaced along the axial direction. The net rings are formed by a broken line along the circumferential direction, and each group of net rings is connected together by a longitudinal line; an elastic sealing ring is fixedly connected to the outside of the expansion net, and a second protrusion corresponding to the longitudinal slide groove is formed on the elastic sealing ring.
7. The field trauma vascular shunt plug fixation device according to claim 6, characterized in that: Arc-shaped support plates are arranged at intervals along the radial direction on the inner side of the expansion net. The arc-shaped support plates are connected to the longitudinal lines through support rods, and the expansion airbags are installed on the inner sides of the arc-shaped support plates.
8. The field trauma vascular shunt plug fixation device according to claim 6, characterized in that: The inner side of the elastic sealing ring is fixedly connected with a screw, and the expansion net is provided with a connection hole for connecting the screw.
9. The field trauma vascular shunt plug fixation device according to claim 6, characterized in that: A cavity is formed on the inner side of the elastic sealing ring, and a guide tube is installed on the end face of the elastic sealing ring facing the middle tube. The guide tube is connected to the cavity and is evenly distributed on the end face of the elastic sealing ring along the circumference. The guide tube is connected to a support airbag, which is used to support the end face of the middle tube after expansion.