A post-extraction self-stopping bleeding perfusion device

Abstract

The application relates to the technical field of medical devices, and discloses a self-hemostasis perfusion device after extraction, which is suitable for heart blood vessel puncture and cardioplegic perfusion operation and can realize in-situ hemostasis, and comprises a hollow shell body, a first slot is formed through one side of the outer wall of the shell body, and a second slot is formed through the other side of the outer wall; an outer needle sleeve is coaxially arranged in the interior of the shell body and extends out of the bottom of the shell body at the lower end; an inner core pipe is arranged in the interior of the outer needle sleeve and connected with the inner wall of the shell body; a needle pipe is arranged in the interior of the inner core pipe, and the bottom end of the needle pipe constitutes a puncture end for puncture operation; and a first button assembly is slidingly assembled in the second slot. The self-hemostasis perfusion device can realize in-situ plugging and hemostasis of a puncture wound after heart blood vessel puncture and perfusion operation without manual suture, simplifies the operation process, shortens the time of cardiac arrest, avoids the surgical risk caused by suture, and improves the safety of heart operation.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a self-hemostatic perfusion device after removal. Background Technology

[0002] In cardiac surgery, the core instrument for targeted perfusion of myocardial protective cardioplegic solution is to first place a purse-string suture before inserting the perfusion needle into the ascending aorta and deliver the cardioplegic solution through the perfusion tube. This achieves myocardial hypothermia protection and blocks myocardial electrical activity, creating the conditions for cardiac arrest surgery.

[0003] Existing conventional perfusion needles only have the functions of puncture and delivery of cardioplegic solution. After the surgical procedure is completed, the perfusion needle must be removed as a whole, leaving a puncture wound in the ascending aorta that matches the needle body. Because there is continuous high-pressure blood flow in the heart and large cardiac vessels, the puncture site cannot be closed by blood clotting on its own. Therefore, it is necessary to use suture needles with sutures to suture the puncture wound for hemostasis in clinical practice.

[0004] Traditional suturing techniques, especially when applied to the fragile aortic wall, are prone to complications such as aortic wall tears, dissections, subadventitial hematomas, and damage to the intima, leading to serious surgical complications. For patients using anticoagulants during surgery, even after suturing, the puncture wound still carries a risk of postoperative bleeding. Furthermore, for minimally invasive surgery, the surgeon manipulates a suture needle with a handheld device within a narrow surgical field, performing a series of procedures including needle insertion, suture passing, and knot tying. This cumbersome process increases intraoperative time and risk. Therefore, this application proposes a self-hemostatic perfusion device after aortic removal to address the aforementioned deficiencies of the existing technologies. Summary of the Invention

[0005] The purpose of this invention is to provide a self-hemostatic perfusion device after removal of a vascular puncture site. This device can achieve in-situ closure and hemostasis of the puncture wound without manual suturing after the perfusion operation is completed, simplifying the surgical procedure, shortening the cardiopulmonary bypass time, avoiding the surgical risks associated with suturing, and improving the safety of cardiac surgery.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a self-hemostatic perfusion device after removal, which is suitable for cardiac vascular puncture and cardioplegic fluid perfusion operations and can achieve in-situ hemostasis, comprising: a hollow outer shell, with a first slot through one side of its outer wall and a second slot through the other side of its outer wall;

[0007] The outer needle sleeve is coaxially disposed inside the outer shell, and its lower end extends out of the bottom of the outer shell;

[0008] The inner core tube is located inside the outer needle sleeve and is connected to the inner wall of the outer shell.

[0009] The needle tube is located inside the inner core tube, and the bottom end of the needle tube forms a puncture end for puncture operations.

[0010] The first button assembly is slidably mounted in the second slot. The driving end of the first button assembly passes through the inclined slot opened on the outer wall of the outer needle sleeve and extends into the third slot opened on the outer wall of the inner core tube.

[0011] The second button assembly is snapped into the first slot, and the connecting end of the second button assembly is connected to the outer wall of the needle tube.

[0012] The drug delivery rod is coaxially inserted into the outer shell and the inside of the needle tube, and the inside of the drug delivery rod has a through-type drug delivery channel.

[0013] The drug delivery assembly is detachably assembled into the drug delivery channel of the drug delivery inner rod;

[0014] A one-way valve is detachably connected to the bottom end of the drug delivery rod. A petal-shaped sealing structure is fixedly installed at the bottom of the one-way valve. The drug delivery assembly extends downward and passes through the one-way valve and the petal-shaped sealing skeleton.

[0015] A limiting component is detachably assembled at the bottom of the outer needle sleeve, its inner wall is connected to the one-way valve, and it can be separated from the outer needle sleeve as the outer needle sleeve rotates.

[0016] Furthermore, the outer wall of the second annular plate at the top of the inner core tube is fixed to the inner wall of the outer shell. An anti-detachment limiting baffle is installed on the inner wall of the outer shell below the second annular plate. The anti-detachment limiting baffle and the second annular plate form a rotation range. The first annular plate at the top of the outer needle sleeve is rotatably assembled within the rotation range.

[0017] Furthermore, the first button assembly includes a first anti-slip pressing block, an arc-shaped locking block, and a transmission rod; the first anti-slip pressing block is disposed on the outside of the second slot, one end of the transmission rod passes through the second slot and is fixedly connected to the inner wall of the first anti-slip pressing block, and the other end of the transmission rod passes through the inclined slot and extends into the interior of the third slot; the arc-shaped locking block is fixed to the outer wall of the transmission rod and is limited within the gap between the inner wall of the outer shell and the outer needle sleeve.

[0018] Furthermore, the second button assembly includes an elastic base, a limiting tooth block, a connecting rod, and a second anti-slip pressing block; the second anti-slip pressing block is disposed on the outside of the first slot, the elastic base is fixedly installed on the top of the outer wall of the needle tube, and the limiting tooth block is assembled and fixedly fixed to the connecting end of the elastic base; one end of the connecting rod is fixedly connected to the inner wall of the second anti-slip pressing block, and the other end of the connecting rod passes through the first slot and is fixedly connected to the limiting tooth block.

[0019] Furthermore, the inner wall of the outer shell is provided with a plurality of limiting slots corresponding to the position of the first slot, and the plurality of limiting slots are matched and adapted to the engaging end of the limiting tooth block.

[0020] Furthermore, the top of the one-way valve is provided with a side limiting groove, and the bottom of the outer wall of the drug delivery inner rod is provided with an annular groove, the side limiting groove and the annular groove being detachably snapped together; a plurality of one-way ratchet grooves are provided in an annular shape at the bottom of the outer wall of the one-way valve.

[0021] Furthermore, the limiting component includes an upper ring seat and a lower ring seat fixed to the bottom of the upper ring seat. The upper ring seat and the lower ring seat together form a closed mounting cavity. A ratchet locking elastic ring is assembled inside the mounting cavity. The inner wall of the ratchet locking elastic ring engages with a plurality of one-way ratchet slots. The one-way ratchet slots are provided with a guide slope and a stop surface. The guide slope allows the ratchet locking elastic ring to slide over to complete the assembly. The stop surface abuts against the limiting ratchet locking elastic ring to prevent the ratchet locking elastic ring from retracting and falling off.

[0022] Furthermore, the lower end of the inner core tube is integrally extended with a bifurcated limiting claw, and the inner wall of the outer needle sleeve is provided with locking teeth for cooperating with the second button assembly to achieve locking and positioning; the outer wall of the upper ring seat is provided with a number of L-shaped slots in an annular array, the bifurcated limiting claw is located inside the vertical section of the L-shaped slot, and the locking teeth are movably engaged inside the transverse section of the L-shaped slot.

[0023] Furthermore, the drug delivery assembly includes a knob and an infusion tube fixed to the bottom of the knob. The knob has an internal thread structure, and the top of the outer wall of the drug delivery rod has a threaded groove. The infusion tube passes through the inside of the drug delivery rod, and the internal thread of the knob is threadedly connected to the threaded groove. A bleeding hole is penetrating the lower part of the outer wall of the infusion tube. A through hole communicating with the inside of the infusion tube is provided on the knob.

[0024] Furthermore, the petal-shaped sealing skeleton is integrally bent and formed from titanium-nickel shape memory alloy.

[0025] The beneficial effects of this invention are: after the operation, the drug delivery rod and the one-way valve can be separated. The petal-shaped occlusion skeleton is released from the needle and opens on its own and attaches to the inner wall of the heart and blood vessel wound. With the help of the limiting component, it forms a bidirectional clamping occlusion from the outer wall of the heart and blood vessel. Only the petal-shaped occlusion skeleton, the one-way valve and the limiting component are left at the puncture wound to achieve occlusion. All other instrument components can be completely removed from the body. There is no need to use sutures to manually suture the puncture wound for hemostasis. This simplifies the operation, shortens the operation time during the operation, reduces the duration of cardiac arrest and reduces the risk of myocardial ischemia and injury. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of the present invention;

[0028] Figure 2 This is a perspective view of the present invention;

[0029] Figure 3 This is an assembly drawing of the present invention;

[0030] Figure 4 This is a partial cross-sectional view of the present invention;

[0031] Figure 5 This is a perspective view of the first button component of the present invention;

[0032] Figure 6 This is a perspective view of the second button assembly of the present invention;

[0033] Figure 7 For the present invention Figure 1 Enlarged view of A in the middle;

[0034] Figure 8 For the present invention Figure 3 Enlarged view of B in the middle;

[0035] Figure 9 For the present invention Figure 3 Enlarged view of C;

[0036] Figure 10 For the present invention Figure 4 Enlarged view of D;

[0037] Figure 11 This is a partial structural diagram of the petal-shaped occlusion framework of the present invention when it is inserted into the coronary blood vessel and opens.

[0038] Figure 12 This is a perspective view of the petal-shaped sealing skeleton of the present invention when it is not open;

[0039] Figure 13 This is a perspective view of the petal-shaped sealing skeleton of the present invention when it is opened;

[0040] Figure 14 This is a perspective view of the outer needle sleeve of the present invention;

[0041] Figure 15 This is a partial cross-sectional view of the outer needle sleeve and the upper ring seat of the present invention during assembly.

[0042] In the diagram, 1. Outer shell; 101. First slot; 102. Second slot; 2. Outer needle sleeve; 201. Inclined slot; 202. First annular plate; 203. Clamping teeth; 3. Inner core tube; 301. Third slot; 302. Second annular plate; 303. Forked limiting claw; 4. First button assembly; 401. First anti-slip pressing block; 402. Arc-shaped clamping block; 403. Transmission rod; 5. Second button assembly; 501. Elastic base; 502. Limiting clamping tooth block; 503. Connecting rod 504. Second anti-slip pressing block; 6. Needle tube; 7. Drug delivery assembly; 701. Knob; 702. Infusion tube; 7021. Bleeding hole; 8. Drug delivery inner rod; 801. Threaded groove; 802. Annular groove; 9. One-way valve; 901. Side limiting groove; 902. One-way ratchet groove; 10. Petal-shaped sealing skeleton; 11. Limiting assembly; 1101. Upper ring seat; 11011. L-shaped groove; 1102. Lower ring seat; 12. Racket locking elastic ring; 13. Anti-dislodgement limiting baffle. Detailed Implementation

[0043] The technical solution of the present invention will now be clearly and completely described with reference to specific embodiments. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0044] Reference Figure 1-15 This invention specifically provides a self-hemostatic perfusion device after removal of a vascular puncture vessel, suitable for cardiac vascular puncture and cardioplegic solution perfusion operations, and capable of achieving in-situ hemostasis. The self-hemostatic perfusion device after removal of a vascular puncture vessel includes a hollow outer shell 1, which serves as an external protective shell for the substrate and provides installation space for internal components. A first slot 101 is provided through one side of the outer wall, and a second slot 102 is provided through the other side of the outer wall. The first slot 101 and the second slot 102 provide sliding and snap-fit ​​assembly windows for the second button assembly 5 and the first button assembly 4, respectively, so that the button assembly can transmit pressing driving force from the outside of the shell to the inside.

[0045] The outer needle sleeve 2 is coaxially disposed inside the outer shell 1, and its lower end extends to the bottom of the outer shell 1. The outer needle sleeve 2 is used to accommodate the inner core tube 3 on the one hand, and can rotate relative to the outer shell 1 on the other hand. At the same time, it has an inclined slot 201 for transmission cooperation with the first button assembly 4.

[0046] The inner core tube 3 is located inside the outer needle sleeve 2 and is fixedly connected to the inner wall of the outer shell 1. After assembly, the inner core tube 3 remains in a fixed position relative to the outer shell 1 and serves as the mounting carrier for the needle tube 6, the second button assembly 5, and the forked limiting claw 303.

[0047] The needle tube 6 is fixedly installed inside the inner core tube 3. The bottom end of the needle tube 6 forms the puncture end for puncture operations. The needle tube 6 is a puncture tube for direct intervention in the heart blood vessels. The puncture end at the bottom end is used to complete the puncture of the heart blood vessels and establish a surgical access. At the same time, the internal cavity of the needle tube 6 can accommodate the drug delivery rod 8 and the petal-shaped occlusion skeleton 10, and form a constraint on the petal-shaped occlusion skeleton 10.

[0048] The first button assembly 4 is slidably mounted inside the second slot 102, and the driving end of the first button assembly 4 passes through the inclined slot 201 and extends into the third slot 301.

[0049] The second button assembly 5 is snapped into the inside of the first slot 101, and the connecting end of the second button assembly 5 is fixedly connected to the outer wall of the inner core tube 3.

[0050] The inner drug delivery rod 8 can be coaxially inserted into the outer shell 1 and the needle tube 6. The inner drug delivery rod 8 has a through-type drug delivery channel inside.

[0051] The drug delivery component 7 is detachably assembled into the drug delivery channel of the drug delivery inner rod 8.

[0052] The limiting component 11 is detachably assembled at the bottom of the outer needle cannula 2. Its inner wall is connected to the one-way valve 9, and it can be separated from the outer needle cannula 2 as the outer needle cannula 2 rotates. The drug delivery component 7 extends downward and passes through the one-way valve 9 and the petal-shaped occlusion frame 10. In use, the petal-shaped occlusion frame 10 is housed inside the needle tube 6. The inner wall of the needle tube 6 forms an external limiting constraint on the petal-shaped occlusion frame 10, keeping the petal-shaped occlusion frame 10 in a closed and unopened state. When the needle tube 6 is withdrawn from the heart blood vessels, the constraint of the needle tube 6 on the petal-shaped occlusion frame 10 is released, and the petal-shaped occlusion frame 10 can switch to an open state. The one-way valve 9 can prevent blood from flowing back out of the heart blood vessels.

[0053] The outer wall of the second annular plate 302 at the top of the inner core tube 3 is fixed to the inner wall of the outer shell 1. An anti-detachment limiting baffle 13 is installed on the inner wall of the outer shell 1 below the second annular plate 302. The anti-detachment limiting baffle 13 and the second annular plate 302 form a rotation range. The first annular plate 202 at the top of the outer needle sleeve 2 is rotatably assembled in the rotation range.

[0054] The first annular plate 202 can rotate within the rotation range, at which time the outer needle sleeve 2 can rotate circumferentially.

[0055] The first button assembly 4 includes a first anti-slip pressing block 401, an arc-shaped locking block 402, and a transmission rod 403. The first anti-slip pressing block 401 is located on the outside of the second slot 102. One end of the transmission rod 403 passes through the second slot 102 and is fixedly connected to the inner wall of the first anti-slip pressing block 401. The other end of the transmission rod 403 passes through the inclined slot 201 and extends into the interior of the third slot 301. The arc-shaped locking block 402 is fixed to the outer wall of the transmission rod 403 and is limited within the gap between the inner wall of the outer shell 1 and the outer needle sleeve 2.

[0056] The first anti-slip pressing block 401 increases the pressing friction, making it easier for doctors to operate; the transmission rod 403 transmits the pressing force; the arc-shaped locking block 402 acts as a limit to prevent the first anti-slip pressing block 401 from separating from the outer shell 1; the end of the transmission rod 403 abuts against the groove wall of the inclined slot 201, and the inclined surface of the inclined slot 201 drives the outer needle sleeve 2 to rotate when pressing; the third slot 301 limits the movement stroke of the transmission rod.

[0057] The second button assembly 5 includes an elastic base 501, a limiting tooth block 502, a connecting rod 503, and a second anti-slip pressing block 504. The second anti-slip pressing block 504 is located on the outside of the first slot 101. The elastic base 501 is fixedly installed on the top of the outer wall of the needle tube 6. The limiting tooth block 502 is assembled and fixed to the connecting end of the elastic base 501. One end of the connecting rod 503 is fixedly connected to the inner wall of the second anti-slip pressing block 504, and the other end of the connecting rod 503 passes through the first slot 101 and is fixedly connected to the limiting tooth block 502.

[0058] The elastic base 501 provides elastic restoring force for the limiting tooth block 502; the second anti-slip pressing block 504 is for external pressing operation; pressing the second anti-slip pressing block 504 causes the limiting tooth block 502 to disengage from the limiting slot via the connecting rod 503, releasing the locking of the outer needle sleeve 2; after being released, the limiting tooth block 502 re-engages into the limiting slot to achieve locking and positioning by relying on the elastic force of the elastic base 501.

[0059] The inner wall of the outer shell 1 is provided with a number of limiting slots at the position corresponding to the first slot 101. The number of slots are matched and adapted to the snap-fit ​​end of the limiting tooth block 502.

[0060] The top of the one-way valve 9 is provided with a side limiting groove 901, and the bottom of the outer wall of the drug delivery rod 8 is provided with an annular groove 802. The side limiting groove 901 and the annular groove 802 can be detachably snapped together to realize the quick assembly and positioning of the one-way valve 9 and the drug delivery rod 8. Several one-way ratchet grooves 902 are provided in an annular shape at the bottom of the outer wall of the one-way valve 9.

[0061] The side limiting groove 901 and the annular groove 802 adopt a gap fitting structure; after the snap-fit ​​assembly is completed, the fitting surfaces of the two form an annular sealing surface, which seals the assembly gap between the drug delivery inner rod 8 and the one-way valve 9, effectively preventing blood in the heart vessels and the cardioplegic solution infused during the operation from leaking through the assembly gap.

[0062] Among them, the inner valve body in the one-way valve 9 is used to control the one-way flow of blood and prevent blood backflow; the inner valve body is a biomimetic valve disc made of polymer material.

[0063] The side limiting slot 901 engages with the annular groove 802 to enable quick separation of the one-way valve 9, facilitating the separation of the one-way valve 9 from the drug delivery inner rod 8; the one-way ratchet groove 902 is a one-way ratchet structure, which cooperates with the ratchet locking elastic ring 12 inside the limiting component 11 to lock the one-way valve 9 when it is assembled downwards.

[0064] The limiting component 11 includes an upper ring seat 1101 and a lower ring seat 1102 fixed to the bottom of the upper ring seat 1101. The upper ring seat 1101 and the lower ring seat 1102 together form a closed installation cavity. A ratchet locking elastic ring 12 is installed inside the installation cavity. The inner wall of the ratchet locking elastic ring 12 is engaged with a plurality of one-way ratchet grooves 902. The one-way ratchet grooves 902 are provided with a guide slope and a stop surface. The guide slope allows the ratchet locking elastic ring 12 to slide over to complete the assembly. The stop surface can abut against the limiting ratchet locking elastic ring 12, effectively preventing the ratchet locking elastic ring 12 from retracting and falling off.

[0065] The guide slope facilitates the downward insertion of the one-way valve 9, and the ratchet locking elastic ring 12 is opened by force and slides through the one-way ratchet groove 902; the stop straight surface bears the axial tensile force, preventing the one-way valve 9 from coming out upward, forming an anti-loosening lock.

[0066] The lower end of the inner core tube 3 is integrally extended with a bifurcated limiting claw 303, and the inner wall of the outer needle sleeve 2 is provided with a locking tooth 203 for cooperating with the second button assembly 5 to achieve locking and positioning; the outer wall of the upper ring seat 1101 is arranged in a ring array with several L-shaped slots 11011, the bifurcated limiting claw 303 is locked and limited inside the vertical section of the L-shaped slot 11011, and the locking tooth 203 is movably locked inside the horizontal section of the L-shaped slot 11011 to achieve locking and positioning of the limiting assembly 11.

[0067] When the forked limiting claw 303 engages with the vertical section of the L-shaped slot 11011, it restricts the rotation direction of the limiting component 11; after the outer needle sleeve 2 rotates, the locking teeth 203 engage with the horizontal section of the L-shaped slot 11011, completing circumferential locking; locking ensures that the limiting component 11 is firmly assembled; when the outer needle sleeve 2 rotates to the unlock position, the limiting component 11 can be disassembled and separated.

[0068] The drug delivery assembly 7 includes a knob 701 and an infusion tube 702 fixed to the bottom of the knob 701. The knob 701 has an internal thread structure, and the top of the outer wall of the drug delivery inner rod 8 has a threaded groove 801. The infusion tube 702 passes through the inside of the drug delivery inner rod 8, and the internal thread of the knob 701 matches and locks with the thread of the threaded groove 801. A bleeding hole 7021 passes through the lower part of the outer wall of the infusion tube 702. A through hole communicating with the inside of the infusion tube 702 is opened through the knob 701.

[0069] The knob 701 is threadedly connected to the threaded groove 801, enabling the detachable assembly of the drug delivery component 7 and the drug delivery rod 8. A through hole is provided on the knob 701, which is connected to the inside of the infusion tube 702, allowing the lumen of the infusion tube 702 to be connected to the outside air, effectively balancing the air pressure inside and outside the lumen. When the needle tube 6 is punctured into the heart blood vessel, the pressure relief and ventilation effect of the through hole can eliminate the negative pressure obstruction inside the infusion tube 702, ensuring that the blood in the heart blood vessel can flow smoothly into the infusion tube 702, and then seep into the drug delivery rod 8 through the bleeding hole 7021, so that the lumen of the infusion tube 702 and the drug delivery rod 8 are filled with blood.

[0070] The petal-shaped sealing skeleton 10 is made of titanium-nickel shape memory alloy and is integrally bent, which has self-adaptive reset characteristics.

[0071] Titanium-nickel shape memory alloy has a stable shape memory effect. The petal-shaped occlusion skeleton 10 can be compressed and closed when squeezed inside the needle tube 6. When it is freed from the constraint of the needle tube 6, it can restore the preset petal opening shape of the petal-shaped occlusion skeleton 10, which is suitable for occlusion of heart and blood vessel wounds.

[0072] Working principle: In the initial state, the petal-shaped occlusion frame 10 is housed inside the needle tube 6 and is radially constrained by the inner wall of the needle tube 6. The petal-shaped occlusion frame 10, made of titanium-nickel shape memory alloy, remains closed and not opened. During operation, the puncture end at the bottom of the needle tube 6 is used to complete the puncture of the heart blood vessel. Pressing the second anti-slip press block 504, with the elastic deformation of the elastic base 501, drives the limiting tooth block 502 to disengage from the limiting slot on the outer shell 1 via the connecting rod 503, releasing the lock on the outer needle sleeve 2, and driving the second button assembly 5 to move upward along the inside of the first slot 101, thereby allowing the needle tube 6 to be pulled out from the heart blood vessel. After releasing the second anti-slip press block 504, the limiting tooth block 502 re-engages into the limiting slot to achieve locking, relying on the elastic force of the elastic base 501.

[0073] After the petal-shaped occlusion frame 10 is released from the constraint of the inner wall of the needle tube 6, the petal-shaped occlusion frame 10 opens up due to its own shape memory characteristics. The opened petal-shaped occlusion frame 10 presses against the inner wall of the cardiac vascular puncture wound. Then, the first anti-slip pressing block 401 is pressed, which drives the transmission rod 403 to slide along the inside of the second slot 102. During the pressing process, the inclined surface of the inclined slot 201 drives the outer needle tube 2 to rotate. The locking teeth 203 on the outer needle tube 2 rotate together. The locking teeth 203 exit the transverse section of the L-shaped slot 11011 on the upper ring seat 1101, releasing the circumferential lock on the limiting component 11. The limiting component 11 can then be disassembled and removed.

[0074] During subsequent operation, the limiting component 11 is pushed, and the ratchet locking elastic ring 12 engages with the one-way ratchet groove 902 of the one-way valve 9, so that the limiting component 11 fits tightly against the outer wall of the heart blood vessel and works in conjunction with the petal-shaped occlusion skeleton 10 to limit and fix the limiting component 11 to the preset position of the heart blood vessel; then the infusion tube 702 is inserted into the inside of the drug delivery inner rod 8, and the knob 701 is threadedly locked with the threaded groove 801 of the drug delivery inner rod 8 to realize the connection between the drug delivery component 7 and the drug delivery inner rod 8; at this time, the blood in the heart blood vessel can flow into the infusion tube 702 and seep into the inside of the drug delivery inner rod 8 through the bleeding hole 7021, so that the lumen of the infusion tube 702 and the drug delivery inner rod 8 is completely filled with blood.

[0075] Next, rotate knob 701 in the opposite direction to separate it from the threaded groove 801, and pull the entire drug delivery assembly 7 out of the drug delivery inner rod 8. During the extraction process, the one-way valve 9 automatically closes, which can effectively block the outflow of blood. At the same time, the blood remaining in the lumen of the infusion tube 702 can flow back to the inside of the drug delivery inner rod 8 through the blood inlet end. At this time, a drug delivery device can be connected to the end of the drug delivery inner rod 8 to deliver the cardioplegic solution to the inside of the heart blood vessels through the drug delivery inner rod 8. The pre-filled blood is used to expel the residual gas in the lumen of the drug delivery inner rod 8, so as to avoid the gas entering the heart blood vessels along with the cardioplegic solution and avoid surgical risks.

[0076] After the surgery, the drug delivery component 7 is inserted into the drug delivery inner rod 8 again, allowing the infusion tube 702 to pass through the one-way valve 9 and extend into the heart blood vessel. The residual gas in the heart blood vessel can be smoothly discharged through the infusion tube 702. After the gas in the lumen is discharged, the infusion tube 702 is pulled out from the drug delivery inner rod 8. Finally, the drug delivery inner rod 8 and the one-way valve 9 are separated by the snap-fit ​​structure of the annular groove 802 of the drug delivery inner rod 8 and the side limiting groove 901 of the one-way valve 9. The drug delivery inner rod 8, the outer needle cannula 2 and other surgical instruments can then be withdrawn from the body as a whole. Finally, the petal-shaped sealing skeleton 10, the one-way valve 9 and the limiting component 11 remain at the vascular puncture site, achieving self-hemostasis and sealing of the puncture hole, and completing the surgical operation.

[0077] Those skilled in the art should understand that this invention is an improved self-hemostatic perfusion device after excision. Its innovation lies in the coordinated layout and specific structural relationship of the components, rather than the implementation method of the basic function. The connection between the existing parts, the operating parameters and control logic are all common knowledge and conventional design choices in the field. Technical personnel can determine the appropriate specific implementation method by conducting limited experiments or referring to technical manuals according to the overall design requirements of the equipment, or by having a qualified professional manufacturer standardize and guide the operation according to mature industry standards. No creative labor is required.

[0078] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, which will not be described in detail here.

Claims

1. A self-hemostatic perfusion device for post-extraction hemostasis, suitable for cardiac vascular puncture and cardioplegic solution perfusion procedures and capable of achieving in-situ hemostasis, characterized in that, include: The hollow outer shell (1) has a first slot (101) through one side of its outer wall and a second slot (102) through the other side of its outer wall. The outer needle sleeve (2) is coaxially disposed inside the outer shell (1), and its lower end extends out of the bottom of the outer shell (1); The inner core tube (3) is located inside the outer needle sleeve (2) and is connected to the inner wall of the outer shell (1); The needle tube (6) is located inside the inner core tube (3), and the bottom end of the needle tube (6) forms a puncture end for puncture operation; The first button assembly (4) is slidably mounted in the second slot (102). The driving end of the first button assembly (4) passes through the inclined slot (201) opened on the outer wall of the outer needle sleeve (2) and extends into the third slot (301) opened on the outer wall of the inner core tube (3). The second button assembly (5) is snapped into the inside of the first slot (101), and the connecting end of the second button assembly (5) is connected to the outer wall of the needle tube (6). The drug delivery rod (8) is coaxially inserted inside the outer shell (1) and the needle tube (6), and a through-type drug delivery channel is provided inside the drug delivery rod (8); The drug delivery assembly (7) is detachably assembled into the drug delivery channel of the drug delivery inner rod (8); A one-way valve (9) is detachably connected to the bottom end of the drug delivery rod (8). A petal-shaped sealing skeleton (10) is fixedly installed at the bottom of the one-way valve (9). The drug delivery assembly (7) extends downward and passes through the one-way valve (9) and the petal-shaped sealing skeleton (10). Limiting component (11), which is detachably assembled at the bottom of the outer needle sleeve (2), its inner wall is connected to the one-way valve (9), and can be separated from the outer needle sleeve (2) as the outer needle sleeve (2) rotates.

2. The self-hemostatic perfusion device after removal according to claim 1, characterized in that, The outer wall of the second annular plate (302) at the top of the inner core tube (3) is fixed to the inner wall of the outer shell (1). An anti-detachment limiting baffle (13) is installed on the inner wall of the outer shell (1) and below the second annular plate (302). The anti-detachment limiting baffle (13) and the second annular plate (302) form a rotation range. The first annular plate (202) at the top of the outer needle sleeve (2) is rotatably assembled in the rotation range.

3. The self-hemostatic perfusion device after removal according to claim 1, characterized in that, The first button assembly (4) includes a first anti-slip pressing block (401), an arc-shaped locking block (402), and a transmission rod (403); the first anti-slip pressing block (401) is located on the outside of the second slot (102), one end of the transmission rod (403) passes through the second slot (102) and is fixedly connected to the inner wall of the first anti-slip pressing block (401), and the other end of the transmission rod (403) passes through the inclined slot (201) and extends into the interior of the third slot (301); the arc-shaped locking block (402) is fixed to the outer wall of the transmission rod (403) and is limited to the gap between the inner wall of the outer shell (1) and the outer needle sleeve (2).

4. The self-hemostatic perfusion device after removal according to claim 1, characterized in that, The second button assembly (5) includes an elastic base (501), a limiting tooth block (502), a connecting rod (503), and a second anti-slip pressing block (504); the second anti-slip pressing block (504) is located on the outside of the first slot (101), the elastic base (501) is fixedly installed on the top of the outer wall of the needle tube (6), and the limiting tooth block (502) is assembled and fixed to the connecting end of the elastic base (501); one end of the connecting rod (503) is fixedly connected to the inner wall of the second anti-slip pressing block (504), and the other end of the connecting rod (503) passes through the first slot (101) and is fixedly connected to the limiting tooth block (502).

5. The self-hemostatic perfusion device after removal according to claim 4, characterized in that, The inner wall of the outer shell (1) is provided with a plurality of limiting slots at the position corresponding to the first slot (101), and the plurality of limiting slots are matched and adapted to the snap-fit ​​end of the limiting tooth block (502).

6. The self-hemostatic perfusion device after removal according to claim 1, characterized in that, The top of the one-way valve (9) is provided with a side limiting groove (901), and the bottom of the outer wall of the drug delivery inner rod (8) is provided with an annular groove (802). The side limiting groove (901) and the annular groove (802) are detachably snapped together. Several one-way ratchet grooves (902) are provided in an annular shape on the lower part of the outer wall of the one-way valve (9).

7. The self-hemostatic perfusion device after removal according to claim 6, characterized in that, The limiting component (11) includes an upper ring seat (1101) and a lower ring seat (1102) fixed to the bottom of the upper ring seat (1101). The upper ring seat (1101) and the lower ring seat (1102) together form a closed mounting cavity. A ratchet locking elastic ring (12) is assembled inside the mounting cavity. The inner wall of the ratchet locking elastic ring (12) is engaged with a plurality of one-way ratchet slots (902). The one-way ratchet slots (902) are provided with a guide slope and a stop surface. The guide slope allows the ratchet locking elastic ring (12) to slide over to complete the assembly. The stop surface can abut against the limiting ratchet locking elastic ring (12) to prevent the ratchet locking elastic ring (12) from retracting and falling off.

8. The self-hemostatic perfusion device after removal according to claim 7, characterized in that, The lower end of the inner core tube (3) is integrally extended with a bifurcated limiting claw (303), and the inner wall of the outer needle sleeve (2) is provided with a locking tooth (203) for cooperating with the second button assembly (5) to achieve locking and positioning; the outer wall of the upper ring seat (1101) is arranged with a number of L-shaped slots (11011) in a ring array, the bifurcated limiting claw (303) is locked and limited inside the vertical section of the L-shaped slot (11011), and the locking tooth (203) is movably locked inside the horizontal section of the L-shaped slot (11011).

9. A self-hemostatic perfusion device after removal according to claim 7, characterized in that, The drug delivery assembly (7) includes a knob (701) and an infusion tube (702) fixed to the bottom of the knob (701). The knob (701) has an internal thread structure, and the top of the outer wall of the drug delivery rod (8) is provided with a threaded groove (801). The infusion tube (702) passes through the inside of the drug delivery rod (8), and the internal thread of the knob (701) is threadedly connected to the threaded groove (801). A bleeding hole (7021) is passed through the lower part of the outer wall of the infusion tube (702). A through hole communicating with the inside of the infusion tube (702) is provided on the knob (701).

10. A self-hemostatic perfusion device after removal according to claim 7, characterized in that, The petal-shaped sealing skeleton (10) is integrally bent and formed from titanium-nickel shape memory alloy.

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