A vascular sheath set with a transition sheath for rapid insertion

Abstract

The present invention discloses a vascular sheath group with a transition sheath for rapid insertion, which includes a sheath tube, a transition sheath, and a puncture needle; the puncture needle extends into the transition sheath and protrudes from the first end of the transition sheath, and the transition sheath extends into the sheath tube and protrudes from the first end of the sheath tube; after combination, the longitudinal positions of the puncture needle, the transition sheath, and the sheath tube do not change; after puncture is completed, the puncture needle and the transition sheath are simultaneously withdrawn from the sheath tube; the transition sheath is a structure arranged between the puncture needle and the sheath tube, and it includes a transition conical tube section for achieving a smooth transition of the dimensional difference from the tip of the puncture needle to the end of the first end of the sheath tube. A large-size transition between the puncture needle and the sheath tube is achieved by means of a three-layer structure through the transition sheath, avoiding damage to the blood vessel when the puncture needle guides the sheath tube directly into the blood vessel; and each layer structure can be prepared separately by means of the three-layer arrangement, and the preparation is simpler; after combination, the positions of the three-layer structure are fixed, and puncture can be completed through the puncture needle.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and particularly relates to a vascular sheath set with a transition sheath for rapid insertion, specifically a vascular sheath set with a transition sheath for rapid insertion and guiding. Background Art

[0002] The disposable vascular sheath set in the prior art is designed to be inserted into the vascular system through percutaneous puncture, and is used to introduce an angiography catheter, a guiding catheter, a balloon dilatation catheter or a stent for interventional diagnosis or treatment operations; the vascular sheath set in the prior art includes a sheath tube, a dilatation sheath, a guiding wire, a puncture needle, and a needle sheath; a holding seat and a drainage tube are arranged at the rear end of the sheath tube. Refer to Figure 2 .

[0003] Currently, the introduction of the sheath tube includes an operation completed in multiple steps using the instruments in the prior art; the specific steps include first introducing the needle sheath with the puncture needle into the blood vessel; then withdrawing the puncture needle from the needle sheath and retaining the needle sheath in the blood vessel; then sending the guiding wire through the needle sheath into the blood vessel; then withdrawing the needle sheath from the guiding wire; then inserting the dilatation sheath into the sheath tube, sleeving the dilatation sheath with the sheath tube outside the guiding wire, and entering the blood vessel along with the guiding wire; then withdrawing the guiding wire and the dilatation sheath from the sheath tube to complete the insertion of the sheath tube.

[0004] The entire operation process requires a large number of structural components and complicated operation steps, and the entire insertion time of the sheath tube is long. This increases the working difficulty and working time of doctors, and for some acute interventional surgeries, the best treatment opportunity will be missed.

[0005] Therefore, in view of the problems of the above-mentioned sheath tube insertion structure with a large number of components and complicated operation steps, the present invention provides a vascular sheath set with a transition sheath for rapid insertion. Summary of the Invention

[0006] Aiming at the problems of the complicated operation process and long time required for the vascular sheath set in the prior art, the inventive concept of the present invention is to expect a new puncture technique that directly guides the outermost sheath tube into the punctured blood vessel through the puncture needle, and the whole process does not require wire guidance. The present invention adopts the following technical solutions:

[0007] A vascular sheath set with a transition sheath for rapid insertion, which includes a sheath tube, a transition sheath, and a puncture needle; the length of the transition sheath is longer than that of the sheath tube, and the length of the puncture needle is longer than that of the transition sheath; the puncture needle extends into the transition sheath and extends out from the first end of the transition sheath, and the transition sheath extends into the sheath tube and extends out from the first end of the sheath tube; after combination, the longitudinal positions of the puncture needle, the transition sheath, and the sheath tube do not change; after puncture, the puncture needle and the transition sheath are simultaneously withdrawn from the sheath tube; the transition sheath is a structure arranged between the puncture needle and the sheath tube, and includes a transition conical tube section for realizing a smooth transition of the dimensional difference from the tip of the puncture needle to the end of the first end of the sheath tube.

[0008] Through the setting of the above solution, a large-size transition between the puncture needle and the sheath tube realized by the transition sheath can be achieved in a three-layer manner, avoiding damage to the blood vessel when the puncture needle guides the sheath tube directly into the blood vessel; and through the three-layer setting method, each layer structure can be prepared separately, the preparation is simpler, and by fixing the positions of the three-layer structures after combination, it is very easy to complete the puncture through the puncture needle. The size difference is transitioned through the transition conical tube section of the transition sheath, and then the sheath tube is introduced into the blood vessel directly after the transition conical tube section, and finally the combined puncture needle and the transition sheath are pulled out together. The entire puncture process is smooth and the operation steps are few.

[0009] Preferably, the transition spinal canal section is a conical tube extending from the end of the first end of the sheath tube towards the tip of the puncture needle;

[0010] Preferably, the position dimension of the second end of the transition spinal canal section, that is, the corresponding end of the first end of the sheath tube, is the largest; the outer diameter of the second end of the transition conical tube section is the same as the inner diameter of the sheath tube; at the first end of the transition conical tube section, that is, at the tip position of the puncture needle, the thickness of the first end of the transition conical tube section is less than 0.1 mm.

[0011] Preferably, the first end of the transition conical tube section is arranged at the very front end of the puncture needle tip or at a position behind the tip of the needle tip.

[0012] Preferably, the distance from the end of the first end of the sheath tube to the tip of the puncture needle does not exceed 3 cm; preferably, it does not exceed 2 cm; such a size setting can ensure that when the straight puncture needle enters the blood vessel obliquely, it can achieve the purpose of introducing the sheath tube into the blood vessel within a safe distance without damaging the blood vessel, without worrying about the risk of piercing the blood vessel due to the puncture needle entering too long.

[0013] Preferably, the length range of the puncture needle is 7 - 10 cm;

[0014] Preferably, the sheath tube includes an insertion tube inserted into the blood vessel; the length range of the insertion tube is 4 - 10 cm.

[0015] Preferably, the inner diameter of the transition conical tube section is equal to the outer diameter of the puncture needle; and the inner diameter does not change with the change of the outer diameter of the transition conical tube section.

[0016] Preferably, the size and shape of the part of the transition sheath outside the non-transition conical tube section are the same as those at the maximum size of the transition conical tube section.

[0017] Preferably, the puncture needle is set as a solid needle, the transition conical tube section extends to the tip of the puncture needle, and the length of the transition conical tube section is not greater than 2 cm;

[0018] Alternatively, the puncture needle is a hollow needle; the front end of the puncture needle is a sloped needle tip; the first end of the transition conical tube section is arranged at the rearmost end of the needle tip position of the puncture needle; the sum of the length of the puncture needle tip and the length of the transition conical tube section is not greater than 2 cm;

[0019] Preferably, the length of the tip of the puncture needle is not greater than 0.5 cm; the size of the transition tapered tube section is not greater than 1.5 cm.

[0020] Preferably, a tapered structure is provided at the end of the first end of the sheath tube; it is used to achieve the dimensional transition between the outer diameter of the first end of the sheath tube and the maximum size of the transition tapered tube section;

[0021] Preferably, the edge size of the first end of the tapered structure is adapted to the size of the maximum size end of the transition tapered tube section. Such a setting can further achieve the purpose of gradually expanding the puncture opening and avoid damage to blood vessels during the process to the greatest extent.

[0022] Preferably, the transition sheath and the puncture needle are fixedly adhered together, and the transition sheath and the puncture enter and exit the sheath tube simultaneously.

[0023] Preferably, when the transition sheath and the puncture needle are adhered together, a position maintaining structure for maintaining the longitudinal position unchanged is provided at the second end of the puncture needle and the second end of the sheath tube.

[0024] Alternatively, the puncture needle and the transition sheath are combined at the second end, and the longitudinal positions of the puncture needle and the transition sheath do not change after combination;

[0025] Preferably, a position maintaining structure one is provided at the second end of the puncture needle and the second end of the transition sheath; a position maintaining structure two is provided at the second end of the transition sheath and the second end of the sheath tube.

[0026] The beneficial effects of the present invention: Through the setting of the transition sheath and the ability to ensure that the longitudinal position does not change after combination, the surgical instruments can be pre-combined before the operation. The puncture needle is operated to drive the sheath tube into the blood vessel. The whole operation process is simple, the steps are less, and the involved instrument components are fewer; the setting of the transition sheath can effectively ensure the gradual expansion of the blood vessel puncture during the puncture process, so that the sheath tube can enter safely and effectively; and through the setting of different transition structures one, the advantages of each scheme can be exerted from the perspectives of preparation and use stability, etc. Description of the Drawings

[0027] Figure 1 It is a schematic diagram of the overall combined state of the vascular sheath group with a transition sheath of the present invention;

[0028] Figure 2 It is a schematic diagram of the vascular sheath structure of the prior art;

[0029] Figure 3 It is a schematic diagram of the overall structure of the vascular sheath group with a transition sheath of the present invention in an uncombined state of being inserted into each other;

[0030] Figure 4 It is a schematic diagram of the longitudinal sectional structure of the sheath tube of the present invention;

[0031] Figure 5 It is a schematic diagram of the transition sheath structure of the present invention;

[0032] Figure 6 This is a schematic structural diagram of the puncture needle of the present invention;

[0033] Figure 7 This is a partially enlarged longitudinal sectional structural diagram of the transition sheath and the first end of the puncture needle of the present invention;

[0034] Figure 8 This is a schematic structural diagram of the valve core rod of the three-way valve of the present invention;

[0035] Figure 9 This is a partial structural diagram of the soft blocking piece of the present invention;

[0036] Figure 10 This is a schematic structural diagram of the position maintaining structure with a locking ring of the present invention;

[0037] Figure 11 This is a partially enlarged longitudinal sectional structural diagram of the accommodating cavity of the position maintaining structure with a locking ring of the present invention;

[0038] Figure 12 This is a schematic structural diagram of the position maintaining structure of the threaded tube and the threaded cavity of the present invention;

[0039] Figure 13 This is a schematic structural diagram of the position maintaining structure with a locking small block of the present invention;

[0040] Figure 14 This is a partially enlarged structural diagram of the locking small block part of the present invention;

[0041] In the figure, 1 is the puncture needle; 12 is the first operating part; 2 is the sheath tube; 21 is the third operating part; 22 is the insertion tube; 221 is the soft blocking piece; 222 is the cross-shaped incision; 23 is the drainage tube; 24 is the three-way valve; 241 is the first ring; 242 is the first opening; 243 is the second opening; 244 is the third opening; 245 is the cylindrical block; 247 is the rotating block; 248 is the operating handle; 249 is the circular plate; 25 is the conical structure; 3 is the transition sheath; 31 is the second operating part; 32 is the transition conical tube section; 411 is the locking small block; 412 is the threaded locking cavity; 421 is the locking ring; 422 is the locking piece; 423 is the accommodating cavity; 424 is the annular notch; 425 is the concentric maintaining ring; 431 is the threaded tube; 432 is the threaded cavity; 61 is the guiding guide wire; 62 is the needle sheath. Detailed implementation mode

[0042] The technical solutions in the embodiments of the present invention are clearly and completely described below through specific specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation manners. Without conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present invention. Note that the first end of each structure involved in the present invention is the advanced blood vessel end, and the second end is the opposite end; the front end is the first punctured blood vessel segment; the rear end is the direction opposite to the front end.

[0043] The prior art disposable vascular sheath set is designed for percutaneous insertion into the vascular system to introduce angiography catheters, guiding catheters, balloon dilation catheters or stents for interventional diagnosis or treatment procedures; the vascular sheath set of the prior art includes a sheath tube 2, a dilating sheath, a guide wire 61, and a puncture needle 1; a grip seat and a drainage tube 23 are provided at the rear end of the sheath tube 2. Refer to Figure 2 , the present invention makes improvements on the basis of the prior art as follows:

[0044] Embodiment 1

[0045] A rapidly implantable vascular sheath set with a transition sheath 3. Refer to Figure 1 、 3 -7; it includes a sheath tube 2, a transition sheath 3, and a puncture needle 1; the length of the transition sheath 3 is longer than that of the sheath tube 2, and the length of the puncture needle 1 is longer than that of the transition sheath 3; the puncture needle 1 extends into the transition sheath 3 and extends out from the first end of the transition sheath 3, and the transition sheath 3 extends into the sheath tube 2 and extends out from the first end of the sheath tube 2; after combination, the longitudinal positions of the puncture needle 1, the transition sheath 3 and the sheath tube 2 do not change; after puncture, the puncture needle 1 and the transition sheath are withdrawn from the sheath tube 2 simultaneously or sequentially.

[0046] The transition sheath 3 is a structure arranged between the puncture needle 1 and the sheath tube 2 for achieving a smooth transition of the dimensional difference at the first end of the puncture needle 1 and the sheath tube 2. The transition sheath 3 includes a transition vertebral canal segment extending from the end of the first end of the sheath tube 2 towards the tip of the puncture needle 1; for achieving a smooth transition of the dimensional difference at the first end of the puncture needle 1 and the sheath tube 2. When in use, the puncture needle 1, the transition sheath 3 and the sheath tube 2 are combined well, the puncture needle 1 is used to pierce the skin and enter the blood vessel, and then the transition conical tube segment 32 of the transition sheath 3 is used to gradually enlarge the puncture opening, and under the guiding action of the transition conical tube segment 32, the sheath tube 2 is introduced into the blood vessel, and then the puncture needle 1 and the transition sheath 3 are withdrawn from the sheath tube 2 together. The whole operation process is simple and convenient.

[0047] The length range of the puncture needle 1 is 7 - 10 cm; the overall length of the transition cone tube section 32 is not less than 1 cm and not more than 5 cm; the sheath tube 2 includes an insertion tube 22 inserted into the blood vessel; the length range of the insertion tube 22 is 4 - 10 cm.

[0048] The inner diameter of the tube of the transition cone tube section 32 is equal to the outer diameter of the puncture needle 1; and the inner diameter does not change with the change of the outer diameter of the transition cone tube section 32. The wall thickness of the tube at the smallest dimension of the transition cone tube section 32 is less than 0.3 mm; the outer diameter at the largest dimension is equal to the inner diameter of the sheath tube 2. This setting can ensure the gradual expansion of the puncture hole during the introduction of the puncture needle 1 and safely introduce the sheath tube 2.

[0049] A dimension setting method for the transition cone tube section 32 and the non-transition cone tube section 32 is as follows, referring to Figure 5 ; the dimensions and shapes of the part of the transition sheath 3 outside the non-transition cone tube section 32 are the same as those at the largest dimension of the transition cone tube section 32.

[0050] The relative position setting method of the transition cone tube section 32 and the tip of the puncture needle 1 is as follows. One is that the transition cone tube section 32 extends to the tip of the puncture needle 1, and the length of the transition cone tube section 32 is not less than 2 cm; the other is that the distance from the smallest dimension of the transition cone tube section 32 to the tip of the puncture needle 1 is greater than 1 cm; both settings are for gradually realizing the expansion of the puncture hole and effectively introducing the sheath tube 2.

[0051] Referring to Figure 1 ; a tapered structure 25 is provided at the end of the first end of the sheath tube 2; for realizing the dimensional transition between the outer diameter of the first end of the sheath tube 2 and the largest dimension of the transition cone tube section 32; the edge dimension of the first end of the tapered structure 25 is adapted to the dimension of the largest dimension end of the transition cone tube section 32. This setting can further achieve the purpose of gradually expanding the puncture opening and avoid damage to the blood vessel during the process to the greatest extent.

[0052] Embodiment 2

[0053] One of the combination methods of the transition sheath 3 and the puncture needle 1 based on the above structure is that the transition sheath 3 and the puncture needle 1 are fixedly adhered together, and the transition sheath 3 and the puncture needle enter and exit the sheath tube 2 together. For the transition sheath 3 and the puncture needle adhered together, a position maintaining structure for maintaining the longitudinal position unchanged is provided at the second end of the puncture needle 1 and the second end of the sheath tube 2. The position maintaining structure can be any structure that can fix the longitudinal position of the combined puncture needle 1 and sheath tube 2.

[0054] The first implementation method is as follows, referring to Figure 13 - 14; The position maintaining structure includes a locking structure corresponding to the second end of the puncture needle 1 and the second end of the sheath tube 2. The locking structure includes a locking small block 411 protruding at the end of the second end of the puncture needle 1 or the second end of the sheath tube 2; and a threaded locking cavity 412 with threads for accommodating the locking small block 411 provided at the second end of the sheath tube 2 or the second end of the puncture needle 1. A more preferred implementation is: a cylindrical operation part 12 convenient for operation is provided at the second end of the puncture needle 1; the locking small blocks 411 are locking small blocks 411 uniformly arranged along the circumference of the operation part 12; the number of the locking small blocks 411 is set to 2-4 pieces, and preferably 2 pieces. The thickness of the locking small block 411 is equal to the thread pitch in the threaded locking cavity 412, and the longitudinal position is locked in this way.

[0055] The second implementation is, refer to Figure 10 - 11 ; The position maintaining structure includes a locking structure corresponding to the second end of the puncture needle 1 and the second end of the sheath tube 2. The locking structure includes a locking ring 421 enlarged from the second end of the puncture needle 1. The locking ring 421 is a ring with a notch; a protruding locking member 422 is provided at the bottom of the ring. It also includes a cylindrical structure provided at the rear end of the sheath tube 2 for the locking ring 421 to be sleeved into and an annular notch 424 for accommodating the locking member 422; a receiving cavity 423 is provided in the cylindrical structure. The locking member 422 includes a horizontal locking plane, and the horizontal locking plane is stuck on the upper plane of the annular notch 424. A preferred implementation is: a concentric maintaining ring 425 can also be provided outside the locking ring 421; the concentric maintaining ring 425 is sleeved outside the operation part 3 of the second end of the sheath tube 2, and the operation part 3 is also set as a cylindrical structure. When in use, the locking ring 421 is sleeved outside the cylindrical structure, and the locking member 422 enters the annular incision to lock the longitudinal position.

[0056] The third implementation is: refer to Figure 12 ; The position maintaining structure includes a threaded cavity 432 with threads extending from the second end of the puncture needle 1 or the second end of the sheath tube 2; and a threaded tube 431 corresponding to the threaded cavity 432 extending from the second end of the sheath tube 2 and the second end of the puncture needle 1; specifically: an operation part 31 is provided at the second end of the sheath tube 2; the operation part 31 extends out of the threaded tube 431, an operation part 12 is provided at the second end of the puncture needle 1, and the operation part 12 extends out of the threaded cavity 432.

[0057] The implementation of the second end of the sheath tube 2 is, refer to Figure 8 - 9; The sheath tube 2 includes an insertion tube 22, a drainage tube 23, and a three-way valve 24; the insertion tube 22 is a tube inserted into the artery, the first end of the drainage tube 23 is fixedly connected to the side of the second end of the insertion tube 22, and the second end of the drainage tube 23 is fixedly connected to the three-way valve 24. The first end of the drainage tube 23 communicates with the sheath tube 2, and a three-way valve 24 is provided at the second end of the drainage tube 23. The introduction and extraction of liquid can be achieved by setting the three-way valve 24 and the drainage tube 23. The drainage tube 23 is a soft transparent tube with a length of 5-20 cm. Preferably, the drainage tube 23 is 10 cm. This length setting can meet the requirements of such a short sheath tube 2 setting and operation. The first end of the insertion tube 22 is a circular tube, and the second end of the insertion tube 22 is provided with an anti-reflux structure. The anti-reflux structure is cylindrical as a whole, and a cylindrical hole two is provided inside the anti-reflux structure. The diameter of the cylindrical hole two is larger than the diameters of the circular tube and the drainage tube 23; the length of the circular tube is 5-8 cm. A circular soft blocking piece 221 is provided inside the anti-reflux structure, and a cross-shaped incision 222 is provided in the middle of the soft blocking piece 221. Under normal conditions, it can prevent the blood in the artery from flowing back, and at the same time, it does not affect the insertion of the transition sheath 3. A first ring 241 is provided on the outermost side of the cylindrical hole, and the first ring 241 is made of a soft material.

[0058] The three-way valve 24 is T-shaped, and its three openings include a first opening 242, a second opening 243, and a third opening 244. All three openings are in a connected state. The first opening 242 and the third opening 244 are on the same horizontal line, and the second opening 243 is perpendicular to the first opening 242 and the third opening 244. The first opening 242 of the three-way valve 24 is fixedly connected to the drainage tube 23. On the outermost sides of the second opening 243 and the third opening 244 of the three-way valve 24, two symmetric locking blocks 411 are provided. The shape of the locking block 411 is rectangular. The inner and outer diameters of the second opening 243 and the third opening 244 are the same as the inner and outer diameters of the second end of the operation part one 12. The three passages of the three-way valve 24 are all arranged on a cylindrical block 245. A second through hole is arranged inside the cylindrical block 245, and the three-way valve 24 is arranged inside the through hole. A third through hole is arranged in the radial direction of the three-way valve 24, and a round hole perpendicular to this through hole is further arranged. The outermost side of the three-way valve 24 is made of a soft material, so that the contact between the three-way valve 24 and the inner wall of the cylindrical block 245 is closer, preventing liquid leakage during pesticide spraying and the outflow of liquid medicine from other pesticide spraying ports. A rotating block 247 is fixed to the upper part of the three-way valve 24. The rotating block 247 is fixedly connected to the three-way valve 24. The diameter of the rotating block 247 is larger than the diameter of the cylindrical block 245. The main body of the rotating block 247 is circular. A protruding operation handle 248 is arranged at the other end of the round hole on the side surface of the rotating block 247. The operation handle 248 forms a 180-degree angle with the round hole. A round plate 249 is arranged at the lower part of the three-way valve 24. The diameter of the cylindrical block 245 is the same as that of the rotating block 247. The rotating block 247 and the round plate 249 clamp the three-way valve 24 inside the cylindrical block 245, and the three-way valve 24 can rotate inside the cylindrical block 245.

[0059] Embodiment 3

[0060] On the basis of Embodiment 1, the fitting method of the puncture needle 1 and the transition sheath 3 is changed; for the scheme of simultaneously withdrawing the puncture needle 1 and the transition sheath 3 from the sheath tube 2, one end of the second end of the transition sheath 3 is combined with the puncture needle 1, and the other end is combined with the sheath tube 2; an operation part one 12 is arranged at the second end of the puncture needle 1, an operation part two 31 is arranged at the second end of the transition sheath 3, and an operation part three 21 is arranged at the second end of the sheath tube 2; at the first end of the operation part one 12 and the second end of the operation part two 31, a position maintaining structure one is arranged, and at the first end of the operation part two 31 and the second end of the operation part three 21, a position maintaining structure two is arranged.

[0061] The maintaining methods of the position maintaining structure one and the position maintaining structure two may be the same or different.

[0062] The first implementation method is as follows: The position maintaining structure 1 includes a locking structure corresponding to the first end of the operating part 1 12 and the second end of the operating part 2 31. The locking structure includes a locking small block 411 protruding at the end of the first end of the operating part 1 12 or the second end of the operating part 2 31; and a threaded locking cavity 412 with threads for accommodating the locking small block 411 provided at the second end of the operating part 2 31 or the first end of the operating part 1 12. Preferably, the outer shape of the operating part 1 12 is a cylindrical tube structure; the locking small blocks 411 are locking small blocks 411 uniformly arranged along the outer circumference of the operating part 1 12; the number of the locking small blocks 411 is set to 2 - 4 pieces, and preferably set to 2 pieces. The thickness of the locking small block 411 is the same as the thread pitch in the threaded locking cavity 412, and the longitudinal position is locked in this way.

[0063] The second implementation method is that the position maintaining structure 1 includes a locking structure corresponding to the first end of the operating part 1 12 and the second end of the operating part 2 31. The locking structure includes a locking ring 421 enlarged from the first end of the operating part 1 12. The locking ring 421 is a ring with a notch; a protruding locking part 422 is provided at the bottom of the ring. It also includes a cylindrical structure provided at the rear end of the sheath 2 for the locking ring 421 to be sleeved into and an annular notch 424 for accommodating the locking part 422. Preferably, a concentric maintaining ring 425 can be further provided on the outer periphery of the locking ring 421; the concentric maintaining ring 425 is sleeved on the outside of the operating part 3 21 at the second end of the sheath 2, and the operating part 3 21 is also set as a cylindrical structure.

[0064] The third implementation method is as follows: The position maintaining structure 1 includes a threaded cavity 432 with threads extending from the first end of the operating part 1 12 or the second end of the operating part 2 31; and a threaded tube 431 corresponding to the threaded cavity 432 extending from the second end of the operating part 2 31 and the first end of the operating part 1 12.

[0065] The setting method of the position maintaining structure 2 can be any one of the above methods, and only the set position dimensions need to be adjusted. Specifically, it can be:

[0066] The first implementation method is as follows: The position maintaining structure 2 includes a locking structure corresponding to the first end of the operating part 2 31 and the second end of the operating part 3 21. The locking structure includes a locking small block 411 protruding at the end of the first end of the operating part 2 31 or the second end of the operating part 3 21; and a threaded locking cavity 412 with threads for accommodating the locking small block 411 provided at the second end of the operating part 3 21 or the first end of the operating part 2 31. The outer shape of the operating part 1 12 is a cylindrical tube structure; the locking small blocks 411 are locking small blocks 411 uniformly arranged along the outer circumference of the operating part 1 12; the number of the locking small blocks 411 is set to 2 - 4 pieces, and preferably set to 2 pieces. The thickness of the locking small block 411 is the same as the thread pitch in the threaded locking cavity 412, and the longitudinal position is locked in this way.

[0067] The second implementation mode is as follows: The position maintaining structure two includes a locking structure corresponding to the first end of the operating part two 31 and the second end of the operating part three 21. The locking structure includes a locking ring 421 which is enlarged and provided at the first end of the operating part two 31. The locking ring 421 is a ring with a notch; a protruding locking member 422 is provided at the bottom of the ring. It also includes a cylindrical structure provided at the rear end of the sheath tube 2 for the locking ring 421 to be sleeved into and an annular notch 424 for accommodating the locking member 422.

[0068] The third implementation mode is as follows: The position maintaining structure two includes a threaded cavity 432 with threads extending from the first end of the operating part two 31 or the second end of the operating part three 21; and a threaded tube 431 corresponding to the threaded cavity 432 and extending from the second end of the operating part three 21 and the first end of the operating part two 31.

[0069] The description of the above embodiments is only for understanding the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements can be made to the present invention, and these improvements will also fall within the protection scope of the claims of the present invention.

Claims

1. A rapidly implantable vascular sheath set with a transition sheath, characterized in that, It includes a sheath tube, a transition sheath, and a puncture needle; the length of the transition sheath is longer than that of the sheath tube, and the length of the puncture needle is longer than that of the transition sheath; the puncture needle extends into the transition sheath and protrudes from the first end of the transition sheath, and the transition sheath extends into the sheath tube and protrudes from the first end of the sheath tube; after combination, the longitudinal positions of the puncture needle, the transition sheath, and the sheath tube do not change; after puncture, the puncture needle and the transition sheath are withdrawn from the sheath tube simultaneously or sequentially; the transition sheath is a structure arranged between the puncture needle and the sheath tube, used to achieve a smooth transition of the dimensional difference at the first end of the puncture needle and the sheath tube; the blood vessel is an arterial blood vessel; The transition sheath includes a transition vertebral canal section extending from the end of the first end of the sheath tube towards the tip of the puncture needle; it is used to achieve a smooth transition of the dimensional difference at the first end of the puncture needle and the sheath tube; A conical structure is arranged at the end of the first end of the sheath tube; it is used to achieve the dimensional transition between the outer diameter of the first end of the sheath tube and the maximum dimension of the transition conical tube section; the puncture needle and the transition sheath are withdrawn from the sheath tube in sequence, the puncture needle is first withdrawn from the transition sheath, and then the transition sheath is withdrawn from the sheath tube; a position maintaining structure one is arranged between the second end of the puncture needle and the second end of the transition sheath; a position maintaining structure two is arranged between the second end of the transition sheath and the second end of the sheath tube; The transition sheath is fixedly adhered to the puncture needle, and the transition sheath and the puncture needle enter and exit the sheath tube simultaneously; for the transition sheath and the puncture needle adhered together, a position maintaining structure for maintaining the longitudinal position unchanged is arranged at the second end of the puncture needle and the second end of the sheath tube; The distance from the end of the first end of the sheath tube to the tip of the puncture needle does not exceed 2 cm; the length range of the puncture needle is 7 - 10 cm; the overall length of the transition conical tube section is not less than 1 cm and not more than 2 cm; the sheath tube includes an insertion tube inserted into the blood vessel; the length range of the insertion tube is 4 - 10 cm; The maintaining methods of the position maintaining structure one and the position maintaining structure two are the same; an operation part one is arranged at the second end of the puncture needle, an operation part two is arranged at the second end of the transition sheath, and an operation part three is arranged at the second end of the sheath tube; The position maintaining structure one includes a locking structure corresponding to the first end of the operation part one and the second end of the operation part two. The locking structure includes a locking ring enlarged from the first end of the operation part one. The locking ring is a ring with a notch, and a protruding locking piece is arranged at the bottom of the ring. It also includes a cylindrical structure for the locking ring to be sleeved into and an annular notch for accommodating the locking piece arranged at the second end of the operation part two; a concentric maintaining ring is arranged on the periphery of the locking ring; the concentric maintaining ring is sleeved outside the operation part three at the second end of the sheath tube, and the operation part three is also arranged as a cylindrical structure; The sheath tube includes an insertion tube, a drainage tube, and a three-way valve; the insertion tube is a pipeline inserted into the artery. The first end of the drainage tube is fixedly connected to the side of the second end of the insertion tube, and the second end of the drainage tube is fixedly connected to the three-way valve; an anti-reflux structure is arranged at the second end of the insertion tube. The anti-reflux structure is overall cylindrical. A cylindrical hole two is arranged inside the anti-reflux structure. A circular soft blocking piece is arranged inside the anti-reflux structure, and a cross-shaped incision is arranged in the middle of the soft blocking piece.

2. The vascular sheath set according to claim 1, wherein The inner diameter of the transition conical tube section is equal to the outer diameter of the puncture needle; and the inner diameter does not change with the change of the outer diameter of the transition conical tube section.

3. The vascular sheath set according to claim 2, wherein The wall thickness of the tube at the minimum dimension of the transition conical tube section is less than 0.1 mm; the outer diameter at the maximum dimension is equal to the inner diameter of the sheath tube.

4. The vascular sheath set according to claim 3, wherein The dimensions of the part of the transition sheath outside the non-transition conical tube section are the same as the dimensions and shapes at the maximum dimension of the transition conical tube section.

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