Puncture sheath combination device capable of removing thrombus

Abstract

The invention provides a puncture sheath combination device capable of removing thrombus, and belongs to the technical field of medical instruments. The device comprises a puncture sheath body and a thrombus removing structure, the thrombus removing structure comprises a guide wire and a thrombus cutting head, and the thrombus cutting head is connected to one end of the guide wire; the thrombus cutting head comprises a circular blade, and cutting edges are distributed on the annular surface of the circular blade. A blood vessel channel is established through the puncture sheath body, the thrombus removing structure is inserted, and the guide wire is pulled to drive the thrombus cutting head to cut and remove thrombus. The puncture sheath combination device has the advantages of being safe, easy to operate and wide in application range.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices. Background Art

[0002] The main function of the puncture sheath and its kit is to provide a safe vascular access for interventional procedures. Through puncture technology, doctors can establish a channel in the patient's body for inserting a guidewire, catheter or other instruments.

[0003] However, during the use of the puncture sheath, blood vessels are prone to thrombosis due to multiple factors. For example, when the sheath is inserted, the blood vessel wall is scratched, exposing the subendothelial collagen fibers and activating platelet aggregation; repeated adjustment of the sheath position or long-term retention causes continuous friction between the outer wall of the sheath and the vascular endothelium, triggering an inflammatory response; the thick sheath reduces the effective circulation area of ​​the blood vessel by more than 50%, the blood flow rate decreases, and coagulation factors accumulate locally; the blood of patients with cancer, nephrotic syndrome, and hereditary thrombophilia is prone to coagulation.

[0004] Once a thrombus is formed, it may move with the blood flow, causing serious consequences such as pulmonary embolism, cerebral embolism, or block the puncture sheath and hinder subsequent operations.

[0005] In the prior art, the Chinese patent application number 202023100478.1 provides "a self-releasing thrombus filtering device, which includes a filter element having a filter hole to allow blood to pass through the filter element and the thrombus remains in the filter element; the filter element is provided with a guide hole for a guide wire to pass through; an operating rod, the filter element is fixed to the distal end of the operating rod; the catheter sheath is sleeved outside the operating rod, and the catheter sheath can move along the length of the operating rod to release the filter element to the outside of the catheter sheath or withdraw it into the catheter sheath; after the filter element is released outside the catheter sheath or withdrawn into the catheter sheath, the catheter sheath can be fixed on the operating rod." This technical solution removes thrombi by filtering, but this method is usually only applicable to fresh soft thrombi and other easy-to-grasp thrombi, and is not applicable to some hard calcified thrombi or old fibrotic thrombi. Summary of the Invention

[0006] The present invention aims to overcome the shortcomings of the prior art by providing a puncture sheath assembly capable of removing thrombi. The assembly comprises a puncture sheath body and a thrombus removal mechanism. The thrombus removal mechanism comprises a guidewire and a thrombus cutting head connected to one end of the guidewire. The thrombus cutting head comprises a circular blade having cutting edges distributed along its annular surface. A vascular channel is established through the puncture sheath body, the thrombus removal mechanism is inserted, and the guidewire is pulled to drive the thrombus cutting head, thereby fragmenting and removing various types of thrombi.

[0007] To achieve the above objectives, the present invention provides the following technical solutions: A puncture sheath assembly for removing thrombi comprises a puncture sheath body and a thrombus removal mechanism. The thrombus removal mechanism comprises a guidewire and a thrombus cutting head connected to one end of the guidewire. The thrombus cutting head comprises a circular blade having cutting edges distributed along its annular surface. Pulling the guidewire drives the thrombus cutting head to shred the thrombus.

[0008] Furthermore, an L-shaped connecting shaft is provided on the guide wire, a circular hole is provided in the middle of the circular blade, the long arm of the L-shaped connecting shaft is vertically connected to the guide wire, the short arm of the L-shaped connecting shaft passes through the circular hole on the circular blade, and the circular blade is limited on the L-shaped connecting shaft by a nut.

[0009] Furthermore, the thrombus removal structure is also provided with a steering adjustment structure, which can control the thrombus cutting head to swing, so that the thrombus can be cut over a wider range.

[0010] Furthermore, the steering adjustment structure includes a transmission chain, a steering wire, a transmission gear and a swing gear; The transmission chain is provided with bidirectional sprockets on both the inner and outer sides. The transmission chain is wrapped around the transmission gear. The outer sprockets of the transmission chain can mesh with the swing gear, and the inner sprockets can mesh with the transmission gear. Both ends of the transmission chain are connected to the steering wire respectively. The centers of the transmission gear and the swing gear are connected to the guide wire through a connecting rod; The thrombus cutting head is connected to the center of the swing gear through an L-shaped connecting shaft; by pulling the steering wire to drive the transmission chain, the transmission gear and the swing gear, the swing of the thrombus cutting head can be controlled.

[0011] Furthermore, the thrombus cutting head includes more than one circular blade, and the circular blades are connected to the guide wire in a linear array, a rectangular array, etc.

[0012] Furthermore, the blade is spiral-shaped, forming a continuous and progressive cutting track when rotating.

[0013] Furthermore, the blade is designed in sections, the front section of the blade is a sharp straight blade for cutting hard thrombus, and the rear section of the blade is a wavy blunt blade for breaking soft fibers.

[0014] Furthermore, the thrombus removal structure is also provided with a supporting protection member.

[0015] Furthermore, the support protection member is composed of four support members; the support member includes a support head and an L-shaped support rod, the support head is connected to the L-shaped support rod, the long arm of the L-shaped support rod is vertically connected to the guide wire, and remains parallel to the long arm of the aforementioned L-shaped connecting shaft; the lengths of the long and short arms of the L-shaped support rod are respectively longer than the lengths of the long and short arms of the L-shaped connecting shaft on the circular blade; the four support members are distributed on the outside of the circular blade or the circular blade array in a rectangular array.

[0016] Furthermore, a spiral groove is provided on the inner wall of the sheath tube of the puncture sheath body to allow the blood to flow in a rotating manner during suction, thereby avoiding the accumulation of debris.

[0017] Due to the adoption of the above technical solution, the present invention has the following advantages and positive effects compared with the prior art, as an example: The thrombus-removing puncture sheath assembly device includes a thrombus removal mechanism, comprising a guidewire and a thrombus cutting head connected to one end of the guidewire; the thrombus cutting head includes a circular blade with cutting edges distributed along its annular surface. The thrombus removal mechanism can be used to shred and remove thrombi in blood vessels, whether fresh soft thrombi or hard, old, fibrous thrombi, thus broadening its application.

[0018] The puncture sheath combination device capable of clearing thrombus further expands the range of thrombus cutting by providing a steering adjustment structure.

[0019] The puncture sheath assembly device capable of clearing thrombus can also support and protect the blood vessel by providing a support and protection member, thereby preventing the thrombus clearing structure from damaging the blood vessel wall when chopping the thrombus. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic structural diagram of a puncture sheath assembly device capable of clearing thrombus provided in an embodiment of the present invention.

[0021] Figure 2 A schematic structural diagram of a puncture sheath assembly device capable of clearing thrombus and having a steering adjustment structure provided in an embodiment of the present invention.

[0022] Figure 3 A schematic structural diagram of a puncture sheath assembly device capable of removing thrombus and having multiple circular blades provided in an embodiment of the present invention.

[0023] Figure 4 This is an enlarged structural schematic diagram of the thrombus removal structure provided in an embodiment of the present invention.

[0024] Figure 5 A schematic structural diagram of a puncture sheath assembly device capable of clearing thrombus and having a support and protection member provided in an embodiment of the present invention.

[0025] Figure 6 This is an enlarged structural schematic diagram of the support and protection member provided in an embodiment of the present invention.

[0026] Description of Reference Numerals A puncture sheath assembly device 1 capable of clearing thrombus; a puncture sheath body 100; a thrombus clearing structure 200; a guide wire 210; a thrombus cutting head 220, a circular blade 221, a cutting edge 222; an L-shaped connecting shaft 230; a steering adjustment structure 240, a transmission chain 241, a steering wire drawing 242, a transmission gear 243, and a swing gear 244; a support protection member 300; a support member 310, a support head 311, an L-shaped support rod 312; a support protection net 320, and a connecting plate 321. DETAILED DESCRIPTION

[0027] The following is a further detailed description of the thrombus-clearing puncture sheath combination device disclosed in the present invention in conjunction with the accompanying drawings and specific embodiments. It should be noted that the technical features or combinations of technical features described in the following embodiments should not be considered isolated, and they can be combined with each other to achieve better technical effects. In the drawings of the following embodiments, the same reference numerals appearing in each drawing represent the same features or components, which can be applied to different embodiments. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0028] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not intended to limit the conditions under which the invention can be implemented. Any structural modification, change in proportional relationship, or adjustment of size should fall within the scope of the technical content disclosed in the invention without affecting the efficacy and purpose of the invention. The scope of the preferred embodiments of the present invention includes alternative implementations, in which the functions can be performed in a non-described or discussed order, including performing the functions in a substantially simultaneous manner or in a reverse order according to the functions involved, which should be understood by those skilled in the art of the art to which the embodiments of the present invention belong.

[0029] Technologies, methods, and apparatus known to persons of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods, and apparatus should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0030] In the description of the embodiments of this application, " / " represents "or," and "and / or" is used to describe the association relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" represents the following three situations: A and B exist alone, B exists alone, and A and B exist at the same time. In the description of the embodiments of this application, "plurality" means two or more. Example

[0031] See also Figure 1 As shown, a puncture sheath assembly device 1 capable of clearing thrombus provided by the present invention is shown.

[0032] The puncture sheath assembly device 1 capable of clearing thrombus comprises a puncture sheath body 100 and a thrombus clearing structure 200. The thrombus clearing structure 200 can enter the puncture sheath body 100, pass through the sheath tube into the blood vessel, reach the thrombus site and clear the thrombus. The thrombus clearing structure 200 comprises a guide wire 210 and a thrombus cutting head 220, and the thrombus cutting head 220 is connected to one end of the guide wire 210. The thrombus cutting head 220 comprises a circular blade 221, and the annular surface of the circular blade 221 is distributed with cutting edges 222. When a thrombus occurs during surgery, the thrombus clearing structure 200 can be inserted into the puncture sheath body 100, pass through the sheath tube into the blood vessel to reach the thrombus site, and the thrombus cutting head 220 is driven by pulling the guide wire 210 to perform a shredding operation on the thrombus.

[0033] During specific implementation, an L-shaped connecting shaft 230 is provided on the guide wire 210, and a circular hole is provided in the middle of the circular blade 221. The long arm of the L-shaped connecting shaft 230 is vertically connected to the guide wire 210, and the short arm of the L-shaped connecting shaft 230 passes through the circular hole on the circular blade, and the circular blade 221 is limited on the L-shaped connecting shaft 230 by a nut. When the guide wire 210 is pulled out, the friction between the blade and the blood can drive the circular blade 221 to rotate and cut on the L-shaped connecting shaft 230. Through the continuous rotation of the circular blade, dynamic annular cutting is achieved, the cutting is more efficient, the range of action is larger, and the thrombus can be easily cut into fine granular substances, which is convenient for subsequent suction or removal of blockages (such as thrombus or tumor debris). In addition, the centrifugal force of the circular blade disperses the pressure, significantly reducing the risk of vascular perforation.

[0034] Preferably, the blade 222 is helical. The helical blade forms a continuous and progressive cutting trajectory during rotation, capable of peeling off tissue or thrombus layer by layer and guiding debris along the axial direction. Simultaneously, the helical angle design generates an inward eddy current suction force, simultaneously directing debris into the suction channel during the cutting process and preventing secondary blockage due to debris accumulation. This integrated "cutting-drainage" design is particularly suitable for treating long strips of thrombus or fibrotic tissue.

[0035] Preferably, the annular surface of the circular blade 221 can be equally divided into 3 to 10 blades 222 .

[0036] The blade height and blade angle are designed according to specific needs, taking into account both cutting efficiency and safety.

[0037] Preferably, the blade 222 can be designed in sections, with the front section of the blade being a sharp straight blade for cutting hard thrombi, and the rear section of the blade being a wavy blunt blade for breaking soft fibers to adapt to blockages of different textures.

[0038] When implementing it specifically, Figure 2 As shown, the thrombus removal structure 200 is further provided with a steering adjustment structure 240 , which can control the thrombus cutting head 220 to swing.

[0039] Preferably, the steering adjustment structure 240 includes a transmission chain 241, a steering wire 242, a transmission gear 243, and a swing gear 244. Sprockets are provided on both the inner and outer sides of the transmission chain. The transmission chain is wrapped around the transmission gear, and the outer sprockets of the transmission chain can mesh with the swing gear, while the inner sprockets can mesh with the transmission gear. The ends of the transmission chain are respectively connected to the steering wire. The centers of the transmission gear 243 and the swing gear 244 are both connected to the guide wire via a connecting rod. The thrombus cutting head 220 is connected to the center of the swing gear via an L-shaped connecting shaft 230. By pulling the steering wire, the transmission chain and transmission gear are started to rotate, and then the sprockets on the outer side of the transmission chain mesh with the swing gear, driving the swing gear to rotate. When the swing gear rotates, the thrombus cutting head connected to it also rotates, allowing the thrombus cutting head to cut a larger range of thrombi.

[0040] Preferably, the other end of the steering wire is connected to the inner wall of the puncture sheath body through a spring. When the steering wire is pulled out of the sheath tube, the spring can automatically pull the steering wire back without manual pushing.

[0041] When implementing it specifically, Figure 3 、 4 As shown, the thrombus cutting head 220 may include a plurality of circular blades, and the plurality of circular blades are connected to the guide wire in a linear array, a rectangular array, or the like.

[0042] In this embodiment, Figure 5 、 6 As shown, the thrombus removal structure 200 is further provided with a supporting protection member 300 .

[0043] During specific implementation, the support protection member 300 is composed of four support members 310. The support member 310 includes a support head 311 and an L-shaped support rod 312, and the support head 311 is connected to the L-shaped support rod 312. The long arm of the L-shaped support rod 312 is vertically connected to the guide wire and remains parallel to the long arm of the aforementioned L-shaped connecting shaft 230. The lengths of the long and short arms of the L-shaped support rod 312 are respectively longer than the lengths of the long and short arms of the L-shaped connecting shaft 230 on the circular blade. The four support members 310 are distributed on the outside of the circular blade or the circular blade array in a rectangular array. When the guide wire enters the blood vessel, the support protection member 300 can prop up the blood vessel to prevent the circular blade from cutting the blood vessel.

[0044] In specific implementation, the support protection member 300 is a support protection net 320, and a connecting plate 321 is provided in the middle of the support protection net 300. The connecting plate 321 is provided with a circular hole, which can be put on the short arm of the L-shaped connecting shaft and fixed by a nut. The support protection net is arranged on the outside of the circular blade.

[0045] In this embodiment, a spiral groove is provided on the inner wall of the sheath tube of the puncture sheath body 100 to allow the blood to flow in a rotating manner during suction, thereby preventing debris from accumulating.

[0046] In this embodiment, a side tube interface is provided at the end of the puncture sheath body that does not enter the blood vessel during puncture. This interface is used to connect to a suction device. While the thrombus removal mechanism is cutting the thrombus, suction is simultaneously performed to extract fine particles of thrombus or tissue debris. The circular blades rotate and cut, creating a "spinning effect," which cuts the thrombus or tissue debris into fine particles. Combined with the suction operation, these particles can be quickly expelled.

[0047] In the above description, the disclosure of the present invention is not intended to limit itself to these aspects. Rather, within the scope of the intended protection of the present disclosure, the components can be selectively and operationally combined in any number. In addition, terms such as "including", "encompassing" and "having" should be interpreted as inclusive or open by default, rather than exclusive or closed, unless they are explicitly defined to the contrary. All technical, scientific or other terms have the meaning understood by those skilled in the art unless they are defined to the contrary. Common terms found in dictionaries should not be interpreted too idealistically or too impractically in the context of relevant technical documents, unless the present disclosure explicitly defines them as such. Any changes and modifications made by a person of ordinary skill in the field of the present invention based on the above disclosure are within the scope of protection of the claims.

Claims

1. A puncture sheath assembly device capable of clearing thrombus, characterized by: It includes a puncture sheath body and a thrombus removal structure; the thrombus removal structure includes a guide wire and a thrombus cutting head, and the thrombus cutting head is connected to one end of the guide wire; the thrombus cutting head includes a circular blade, and the annular surface of the circular blade is distributed with cutting edges. The thrombus is cut by pulling the guide wire to drive the thrombus cutting head to move and cut the thrombus.

2. The thrombus-clearing puncture sheath assembly device according to claim 1, characterized in that: An L-shaped connecting shaft is provided on the guide wire, a circular hole is provided in the middle of the circular blade, the long arm of the L-shaped connecting shaft is vertically connected to the guide wire, the short arm of the L-shaped connecting shaft passes through the circular hole on the circular blade, and the circular blade is limited on the L-shaped connecting shaft by a nut.

3. The thrombus-clearing puncture sheath assembly according to claim 1, characterized in that: The thrombus removal structure is also provided with a steering adjustment structure, which can control the thrombus cutting head to swing, so that the thrombus can be cut over a wider range.

4. The thrombus-clearing puncture sheath assembly according to claim 3, characterized in that: The steering adjustment structure includes a transmission chain, a steering wire, a transmission gear and a swing gear; The transmission chain is provided with bidirectional sprockets on both the inner and outer sides. The transmission chain is wrapped around the transmission gear. The outer sprockets of the transmission chain can mesh with the swing gear, and the inner sprockets can mesh with the transmission gear. Both ends of the transmission chain are connected to the steering wire respectively. The centers of the transmission gear and the swing gear are connected to the guide wire through a connecting rod; The thrombus cutting head is connected to the center of the swing gear through an L-shaped connecting shaft; by pulling the steering wire to drive the transmission chain, the transmission gear and the swing gear, the swing of the thrombus cutting head can be controlled.

5. The thrombus-clearing puncture sheath assembly device according to claim 1, characterized in that: The thrombus cutting head includes more than one circular blade, and the circular blades are connected to the guide wire in a linear array, a rectangular array, etc.

6. The thrombus-clearing puncture sheath assembly device according to claim 1, characterized in that: The blade is spiral-shaped and forms a continuous and progressive cutting track when rotating.

7. The thrombus-clearing puncture sheath assembly device according to claim 1, characterized in that: The blade is designed in sections, the front section of the blade is a sharp straight blade for cutting hard thrombus, and the rear section of the blade is a wavy blunt blade for breaking soft fibers.

8. The thrombus-clearing puncture sheath assembly device according to claim 1, characterized in that: The thrombus removal structure is further provided with a supporting protection member.

9. The thrombus-clearing puncture sheath assembly device according to claim 8, characterized in that: The support protection member is composed of four support members; the support member includes a support head and an L-shaped support rod, the support head is connected to the L-shaped support rod, the long arm of the L-shaped support rod is vertically connected to the guide wire and remains parallel to the long arm of the aforementioned L-shaped connecting shaft; the lengths of the long and short arms of the L-shaped support rod are respectively longer than the lengths of the long and short arms of the L-shaped connecting shaft on the circular blade; the four support members are distributed on the outside of the circular blade or the circular blade array in a rectangular array.

10. The puncture sheath assembly device capable of clearing thrombus according to claim 1, characterized in that: A spiral groove is provided on the inner wall of the sheath tube of the puncture sheath body to allow the blood to flow in a rotating manner during suction, thereby avoiding the accumulation of debris.

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