Extracorporeal circulation puncture suite

Abstract

The utility model discloses an extracorporeal circulation puncture suite which comprises a dilator, a puncture accessory and a suture accessory, and the dilator used for blood vessel dilation, the puncture accessory used for puncture and the suture accessory used for fixing a pipeline are sealed in a packaging bag body after being sterilized through ethylene oxide. The dilator is provided with dilation heads for dilating blood vessels continuously in a staged mode, and the number of the dilation heads on the dilator can be adjusted. The extracorporeal circulation puncture kit has the advantages that the multi-stage dilator with the adjustable dilation head in the extracorporeal circulation puncture kit is used for performing staged continuous dilation on blood vessels, repeated replacement of the dilator is avoided, the risk of infection of a patient is reduced while the operation efficiency is improved, and due to the staged continuous dilation, intubation tubes of different specifications are high in universality and high in practicability. Due to the design that the hydrophilic coating and the hardening material are additionally arranged on the guide wire, the surface of the guide wire is smoother, puncture catheterization is smoother and more accurate, due to the arrangement of the suture accessory, the problems of intubation fixing and skin wound suture are solved in a clinical one-stop mode, and the preparation workload of clinical operations is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of extracorporeal circulation puncture kits. BACKGROUND

[0002] For respiratory critical patients or patients with heart and lung cannot normally operate, hospital usually uses ECMO machine treatment, inserts cannula matched with ECMO into human body, leads blood flowing through heart and lung to machine, simulates operation temporarily by machine outside body to replace heart and lung circulation of human, and strives for more treatment healing time for heart and lung failure patient.

[0003] Cannula is an important link of extracorporeal artificial heart-lung circulation, and the operation of catheterization is particularly important, because the flow of heart and lung circulation blood is large, and when cannula is placed, it cannot directly enter the blood vessels of heart and lung, and needs to enter from femoral artery / jugular vein or femoral vein / jugular vein using extracorporeal circulation puncture kit, but the inner diameter of artery and vein is smaller than the size of cannula, and when cannula is punctured, the puncture point needs to be expanded using the elasticity of blood vessels, and then cannula is inserted into blood vessels and enters heart chamber under the guidance of guide wire.

[0004] At present, the puncture kit for extracorporeal circulation cannula in clinical is imported product, and it must match its own brand cannula, if national brand cannula is used, it cannot be matched, and when guide wire guide device is used, the guide wire equipped with imported product is metal guide wire, which is slightly rough and soft, not smooth enough to enter blood vessels, easy to jam, and cannot provide enough support, causing difficulty in entering catheter into blood vessels and insufficient depth of entry; in addition, the dilator equipped with it is single-stage dilator, which needs to be frequently replaced with different specifications of dilator for step-by-step expansion when dilating blood vessels, which leads to prolonged expansion time, long catheterization time and low efficiency, and frequent replacement of dilator also increases the infection probability of patient, and is inconvenient to use.

[0005] In summary, a high adaptability extracorporeal circulation puncture kit is needed, which can reduce operation time and reduce the infection rate of patients. UTILITY MODEL CONTENT

[0006] The technical problem to be solved by the utility model is the problem of poor universality of the existing extracorporeal circulation puncture kit, long catheterization time and low efficiency, and high risk of infection of patients mentioned in the background.

[0007] In view of the above technical problems, the utility model provides a kind of extracorporeal circulation puncture kit;It is realized by the following technical solutions: a kind of extracorporeal circulation puncture kit, including dilator, puncture accessory and suture accessory, for the dilator of vascular dilatation and for the puncture accessory and for the suture accessory of fixed pipeline are sealed in packing bag body after being sterilized by ethylene oxide, the dilator is provided with the dilating head of stage type continuous expansion blood vessel, and the number of the dilating head on the dilator is adjustable.

[0008] The utility model discloses the preferred technical scheme, the dilator includes dilating rod and the dilating head of setting on dilating rod, the dilating head includes primary dilating head, secondary dilating head, tertiary dilating head and conversion dilating head, tertiary dilating head sets at the end of dilating rod, primary dilating head is connected with secondary dilating head, and secondary dilating head and conversion dilating head are replaceable and connected with dilating rod, adjust expansion ladder, and the setting of dilating head is convenient for the stage type continuous expansion of blood vessel according to need, avoids the replacement of different specifications dilator, improves expansion efficiency, and reduces the infection risk of patient.

[0009] The preferred technical scheme of the utility model, the primary dilating head includes dilating part and connecting end, the dilating part is conical pipe, and the connecting end is set at one end of dilating part, the connecting end is provided with connecting table, and the primary dilating head is connected with the secondary dilating head through the connecting table;Secondary dilating head and tertiary dilating head all include dilating part and buffer part, and the buffer part is connected with the dilating part, and the outer diameter of buffer part is same with the minimum end outer diameter of dilating part, and the connecting table is set at the end of dilating part, and secondary dilating head and tertiary dilating head are connected through the connecting table, and the setting of secondary dilating head and tertiary dilating head of different diameters divides dilating head into three sections, so that it is convenient to expand blood vessel according to need stage type continuously, avoids the replacement of dilator in expansion process, and also applies to different specifications cannula, and it is convenient to use and has high versatility.

[0010] The preferred technical scheme of the utility model, the conversion dilating head includes dilating part and connecting end, the dilating part is conical pipe, and the connecting end is set at one end of dilating part, the connecting end is provided with connecting table, and the conversion dilating head is connected with the tertiary dilating head through the connecting table, and the setting of conversion dilating head converts dilating head into two sections, and such setting applies to different specifications, and also shortens expansion distance.

[0011] The preferred technical scheme of the utility model, the puncture accessory includes puncture needle, guide wire, scalpel and syringe;The guide wire includes inner core, the inner core is movable relative to guide wire, and hydrophilic hard coating is coated on guide wire, and the setting of puncture accessory is convenient for the puncture of blood vessel.

[0012] The preferred technical scheme of the utility model, the suture accessory includes suture needle and suture line, and the setting of suture accessory is convenient for operating personnel to fix cannula by suture accessory, and it is convenient for operating personnel to use.

[0013] The extracorporeal circulation puncture kit is characterized in that: the kit comprises a dilating tube, a puncture accessory and a suture accessory, the dilating tube for dilating a blood vessel, the puncture accessory for puncturing and the suture accessory for fixing a pipeline are sealed in a packaging bag after sterilization by ethylene oxide, and an end of the dilating tube is provided with a dilating head for continuously dilating the blood vessel in stages.

[0014] According to the preferred technical scheme of the utility model, the dilating tube comprises a first dilating tube, a second dilating tube, a third dilating tube and a fourth dilating tube, the diameters of the first dilating tube, the second dilating tube, the third dilating tube and the fourth dilating tube and the diameter of the dilating head of the end are different, and the dilating tube is provided to facilitate selection of dilating tubes of different specifications to facilitate dilating the blood vessel.

[0015] According to the preferred technical scheme of the utility model, the puncture accessory comprises a puncture needle, a guide wire, a scalpel and a syringe, the guide wire comprises an inner core, the inner core is movable relative to the guide wire, and a hydrophilic hard coating is coated on the guide wire, and the puncture accessory is provided to facilitate puncturing the blood vessel.

[0016] According to the preferred technical scheme of the utility model, the suture accessory comprises a suture needle and a suture thread, and the suture accessory is provided to facilitate an operator to fix the cannula by using the suture accessory, thereby facilitating the operator to use.

[0017] The utility model has the beneficial effects compared with the prior art that:

[0018] The technical scheme of the utility model utilizes the multistage dilators with adjustable dilating heads in the extracorporeal circulation puncture kit to continuously dilate the blood vessel in stages, saves the cannulation time, avoids repeatedly replacing the dilator, improves the operation efficiency, reduces the risk of infection of the patient, improves the size limitation of the imported brand dilator by the provision of the continuous dilating in stages, has strong universality for different specifications of cannulas, increases the hydrophilic coating and the hard material on the guide wire, makes the surface of the guide wire smoother, provides sufficient supporting force, protects the blood vessel, makes the puncture cannulation smoother, reaches the position more quickly and accurately, and in addition, the provision of the suture accessory solves the problems of fixing the cannula and suturing the skin wound in one station in clinic, reduces the workload of the clinical operation preparation, improves the operation safety and the treatment efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic view of the embodiment 1 of the utility model;

[0020] Figure 2 It is a three-dimensional schematic view of the embodiment 2 of the utility model;

[0021] Figure 3 It is a three-dimensional schematic view of the dilator of the embodiment 2 (two-stage type).

[0022] Figure 4 This is a three-dimensional schematic diagram of the expander in Example 2 (three-section type);

[0023] Figure 5 This is a three-dimensional schematic diagram of the secondary expansion head in Example 2;

[0024] Figure 6 This is a three-dimensional schematic diagram of the conversion expansion head in Example 2;

[0025] Figure 7 Exploded view of the expander in Example 2 (three-section design);

[0026] Figure 8 This is an exploded view of Embodiment 2 of this utility model;

[0027] Explanation of reference numerals in the attached drawings: 1-Dilatator, 11-Dilatator rod, 12-First-stage dilatator head, 13-Second-stage dilatator head, 14-Third-stage dilatator head, 15-Buffer section, 16-Dilatator section, 17-Converter dilatator head, 18-Connecting end, 19-Connecting platform, 2-Punch accessory, 21-Punch needle, 22-Guide wire, 23-Scalpel, 24-Injector, 3-Suture accessory, 31-Suture needle, 32-Suture thread, 4-Packaging bag body. Detailed Implementation

[0028] The following will refer to the appendix in the embodiments of this utility model. Figures 1-8 The technical solutions in the embodiments of this utility model will be described in detail below. Example 1

[0029] like Figure 1 As shown, an extracorporeal circulation puncture kit includes a puncture attachment 2, a suture attachment 3, and a dilator 5, wherein the dilator 5, the puncture attachment 2, and the suture attachment 3 are sealed together in a packaging bag 4 after being sterilized with ethylene oxide.

[0030] The function of puncture attachment 2 is to puncture blood vessels, creating preconditions for the insertion of dilator 1.

[0031] The function of the dilator 5 is to dilate the blood vessel according to the specifications of the cannula, creating preconditions for cannula insertion and facilitating cannula insertion.

[0032] The purpose of suture attachment 3 is to provide a one-stop solution for intubation fixation and skin wound suturing in clinical practice, thereby reducing the workload of clinical surgical preparation and improving surgical safety and treatment efficiency.

[0033] The expansion tube 5 comprises a first expansion tube 51, a second expansion tube 52, a third expansion tube 53 and a fourth expansion tube 54, which are open-ended hollow plastic tubes made of polytetrafluoroethylene (PTFE) material, and expansion heads are integrally fixed at the ends of the first expansion tube 51, the second expansion tube 52, the third expansion tube 53 and the fourth expansion tube 54.

[0034] The expansion head is a stage-type continuous expansion head, and the expansion head as a whole is in the shape of a truncated cone, and the diameter of the end of the expansion head is smaller than the diameter of the expansion tube 5.

[0035] In order to improve the expansion efficiency, the expansion head on the first expansion tube 51, the second expansion tube 52, the third expansion tube 53 and the fourth expansion tube 54 is preferably a two-section expansion head, and the outer diameter of the first expansion tube 51, the second expansion tube 52, the third expansion tube 53 and the fourth expansion tube 54 gradually increases.

[0036] The diameter of the fourth expansion tube 54 is preferably in the range of F6-F10, the diameter of the third expansion tube 53 is in the range of F11-F15, the diameter of the second expansion tube 52 is in the range of F16-F20, and the diameter of the first expansion tube 51 is in the range of F21-F24, and different expansion tubes can be selected according to the specifications of the cannula.

[0037] The puncture accessory 2 comprises a puncture needle 21, a guide wire 22, a scalpel 23 and a syringe 24, the puncture needle 21 is used for puncturing blood vessels to facilitate the placement of the dilator 1, the guide wire 22 is used for guiding the cannula into the heart chamber, the scalpel 23 is used for assisting the operation, and the syringe 24 is used for detecting the continuity of the cannula.

[0038] The puncture needle 21, the guide wire 22, the scalpel 23 and the syringe 24 are all existing devices that can be directly used, and the guide wire 22 is preferably a movable guide wire with an inner core.

[0039] In order to improve the support of the guide wire 22 and the smoothness of entering the blood vessel, a hydrophilic and hard coating is coated on the outside of the guide wire 22, and the polytetrafluoroethylene (PTFE) coating is preferred in this embodiment.

[0040] The suture accessory 3 comprises a suture needle 31 and a suture line 32, which are existing medical surgical suture needles and suture lines, and are used to solve the problems of cannula fixation and skin wound suture in one station in clinic, and reduce the workload of clinical operation preparation.

[0041] Definition: In this embodiment, the expansion tube 5 is inserted into one end of the patient's blood vessel, which is the front end, and the other end opposite to it is the rear end.

[0042] The expansion process of the embodiment: when in use, first select the appropriate specification of the expansion tube according to the size of the cannula, for example, if the size of the cannula is F17, the second expansion tube 52 needs to be selected, and then the second expansion tube 52 is inserted into the blood vessel from the front end along the puncture hole, that is, the expansion of the blood vessel is completed. Embodiment 2

[0043] As Figure 2 shown, in order to reduce the use cost and reduce the number of expansion tubes, the utility model also discloses a kind of extracorporeal circulation puncture kit, including dilator 1 and puncture accessory 2 and suture accessory 3, wherein dilator 1, puncture accessory 2 and suture accessory 3 are collectively sealed in packaging bag body 4 after oxirane sterilization.

[0044] The role of puncture accessory 2 is to puncture the blood vessel, to create the precondition for the placement of dilator 1.

[0045] The role of dilator 1 is to expand the blood vessel according to the size of the cannula, to create the precondition for the placement of the cannula, to facilitate the placement of the cannula.

[0046] The role of suture accessory 3 is to solve the problem of cannula fixation and skin wound suture in clinical one-stop mode, to reduce the workload of clinical operation preparation, to improve the safety and efficiency of operation.

[0047] As Figure 3 , 4 , 5, 6 and 7, dilator 1 includes expansion rod 11 and expansion head which can be detachably installed on expansion rod 11, and the blood vessel of patient can be expanded through expansion head, to facilitate the placement of cannula.

[0048] Expansion head includes primary expansion head 12, secondary expansion head 13, tertiary expansion head 14 and conversion expansion head 17, wherein tertiary expansion head 14 is arranged on expansion rod 11, primary expansion head 12 is detachably connected with secondary expansion head 13, secondary expansion head 13 is detachably connected with tertiary expansion head 14, and conversion expansion head 17 is detachably connected with tertiary expansion head 14.

[0049] Expansion rod 11 is a hollow plastic tube with open ends made of polytetrafluoroethylene (PTFE) material, in order to facilitate the connection of expansion head and expansion rod 11, internal thread is formed on the inner wall of one end of expansion rod 11, and expansion head can be screwed on expansion rod 11 through thread.

[0050] The first expansion head 12 is a hollow plastic cone pipe with open ends made of polytetrafluoroethylene (PTFE) material. The first expansion head 12 includes an expansion part 16 and a connecting end 18. The expansion part 16 is a frustum with a circular cross section. In order to adapt to various sizes of cannulas, the size of the front end of the expansion part 16 with the smallest cross-sectional area is equal to F6 (the smallest size of the current cannula is F6). At the rear end of the expansion part 16, a circular tube is integrally protruded from the end surface perpendicular to the expansion part 16, which is named as the connecting end 18. The outer diameter of the connecting end 18 is the same as the maximum outer diameter of the rear end of the expansion part 16.

[0051] In order to facilitate the connection of the first expansion head 12 and the second expansion head 13, an annular boss is vertically protruded from the end surface of the connecting end 18, which is named as the connecting boss 19. The inner diameter of the connecting boss 19 is the same as the inner diameter of the connecting end 18, and the outer diameter of the connecting boss 19 is smaller than the outer diameter of the connecting end 18. An external thread is formed on the circular surface of the connecting boss 19. The first expansion head 12 is connected with the second expansion head 13 through the thread on the connecting boss 19.

[0052] The connecting end 18 is arranged to make the connection between the first expansion head 12 and the second expansion head 13 a certain distance away from the expansion part 16, preventing the connection from scratching the inner wall of the blood vessel.

[0053] The second expansion head 13 is a hollow plastic pipe with open ends made of polytetrafluoroethylene (PTFE) material. The second expansion head 13 includes a buffer part 15, an expansion part 16, and a connecting end 18. The buffer part 15 is connected with the expansion part 16, and the connecting end 18 is located at the other end of the expansion part 16.

[0054] The buffer part 15 on the second expansion head 13 is a tube with a circular cross section. The outer diameter of the buffer part 15 is the same as the outer diameter of the connecting end 18 on the first expansion head 12. An internal thread is formed on the inner wall of one end of the buffer part 15. The connecting boss 19 on the end of the first expansion head 12 can be screwed with the buffer part 15 on the second expansion head 13, completing the connection between the first expansion head 12 and the second expansion head 13.

[0055] The expansion part 16 on the second expansion head 13 is a frustum with a circular cross section. In order to adapt to various sizes and stages of continuous expansion of cannulas, the size of the front end of the expansion part 16 with the smallest cross-sectional area is the same as the outer diameter of the buffer part 15 on the second expansion head 13. In order to improve the smoothness of expansion, the connection between the buffer part 15 and the expansion part 16 on the second expansion head 13 is smoothly processed.

[0056] The connecting end 18 on the second expansion head 13 is the same as the connecting end 18 on the first expansion head 12, both of which are circular tubes. The outer diameter of the connecting end 18 on the second expansion head 13 is the same as the maximum outer diameter of the rear end of the expansion part 16 on the second expansion head 13.

[0057] In order to facilitate the connection of the secondary expansion head 13 and the tertiary expansion head 14, a threaded connecting table 19 is also integrally fixed on the connecting end 18 of the secondary expansion head 13, and the secondary expansion head 13 is connected with the tertiary expansion head 14 through the connecting table 19.

[0058] The tertiary expansion head 14 is also a hollow plastic tube with open ends made of polytetrafluoroethylene (PTFE) material, and the tertiary expansion head 14 also includes a buffer part 15, an expansion part 16, and a connecting end 18. The buffer part 15 is connected with the expansion part 16, and the connecting end 18 is located at the other end of the expansion part 16.

[0059] The difference between the tertiary expansion head 14 and the secondary expansion head 13 is that the outer diameter of the buffer part 15 on the tertiary expansion head 14 is the same as the outer diameter of the connecting end 18 on the secondary expansion head 13, and the size of the rear end of the expansion part 16 with the largest cross-sectional area on the tertiary expansion head 14 is equal to F24 (the smallest size of the cannula is F24 at present). Such a design makes the dilator 1 with the primary expansion head 12, the secondary expansion head 13, and the tertiary expansion head 14 compatible with different specifications and brands of cannulas on the market, and has strong universality.

[0060] The dilator 1 with the primary expansion head 12, the secondary expansion head 13, and the tertiary expansion head 14 is a three-section continuous expansion, but because the size span of the adapted cannula is large, it is inevitable to cause the length of the expansion head to be longer. In order to solve this problem, when the size of the cannula is greater than F12, the conversion expansion head 17 can be used instead of the original primary expansion head 12 and the secondary expansion head 13, and two-section continuous expansion is performed by using the conversion expansion head 17 and the tertiary expansion head 14 in cooperation, which greatly reduces the length of the expansion head. In the present embodiment, the conversion expansion head 17 and the tertiary expansion head 14 are installed on the expansion rod 11 by default, that is, two-section continuous expansion is used by default. When a cannula with a smaller size is encountered, the conversion expansion head 17 needs to be removed, and the primary expansion head 12 and the secondary expansion head 13 are installed.

[0061] The conversion expansion head 17 is also a hollow plastic cone tube with open ends made of polytetrafluoroethylene (PTFE) material, and the conversion expansion head 17 includes an expansion part 16 and a connecting end 18. The connecting end 18 is integrally fixed on the end face at the rear of the expansion part 16, and in order to facilitate the connection of the conversion expansion head 17 and the tertiary expansion head 14, an external thread connecting table 19 is also fixed on the connecting end 18 of the conversion expansion head 17.

[0062] In order to adapt to various specifications of cannulas and stage continuous expansion, the size of the front end of the expansion part 16 with the smallest cross-sectional area on the conversion expansion head 17 is equal to F12, and the size of the rear end of the expansion part 16 with the largest cross-sectional area is the same as the outer diameter of the buffer part 15 on the tertiary expansion head 14.

[0063] Definition: In this embodiment, the dilator 1 is inserted into one end of the patient's blood vessel, which is the front end, and the other end opposite to it is the rear end.

[0064] As shown in Figure 2 and 8 , the puncture accessory 2 includes a puncture needle 21, a guide wire 22, a scalpel 23, and a syringe 24, the puncture needle 21 is used for puncturing the blood vessel to facilitate the placement of the dilator 1, the guide wire 22 is provided to guide the catheter into the heart chamber, the scalpel 23 is provided to assist the operation, and the syringe 24 is provided to detect the on-off of the catheter placement.

[0065] The puncture needle 21, the guide wire 22, the scalpel 23, and the syringe 24 are all existing devices that can be directly used, and the guide wire 22 is preferably a functional guide wire with an inner core and is movable.

[0066] In order to improve the support of the guide wire 22 and improve the smoothness of entering the blood vessel, a hydrophilic and hard coating is coated on the outside of the guide wire 22, and the embodiment preferably coats a polytetrafluoroethylene (PTFE) coating.

[0067] The suture accessory 3 includes a suture needle 31 and a suture line 32, which are existing medical surgical suture needles and suture lines, and their function is to solve the problem of one-stop catheter fixation and skin wound suture in clinical practice, reducing the workload of clinical operation preparation.

[0068] The use process of the dilator 1 in this embodiment: when in use, first select the appropriate dilator head according to the size of the catheter, if the size of the catheter is between F6 and F11, the conversion dilator head 17 needs to be removed, the first dilator head 12 and the second dilator head 13 are screwed onto the third dilator head 14, and then the dilator 1 is inserted into the blood vessel from the front end along the puncture hole for dilatation; when the size of the catheter is between F12 and F24, the dilator 1 hole is directly used, and when in use, the dilator 1 is inserted into the blood vessel from the front end along the puncture hole, and the blood vessel can be dilated.

[0069] The advantages of the technical scheme of the utility model are:

[0070] 1. The limitations of imported products in the size of the dilator are overcome, and the dilator is replaced by different specifications for dilatation, which is replaced by the stage continuous dilatation of the present scheme, the limitations of different specifications of the dilator in size are improved, the present technical scheme is compatible with the size range of F6-F24, and different specifications of the catheter can be considered, and the applicability is strong.

[0071] 2. The present technical scheme replaces the replacement of dilators of different specifications with the stage continuous dilatation of the same dilator, and the entire dilatation process can be completed by one dilator, which is efficient and avoids the risk of infection caused by repeated replacement of the dilator.

[0072] 3、The design of the guide wire increases the hydrophilic coating and the hardening material, so that the guide wire surface is smoother, sufficient supporting force is provided, the blood vessel is protected, and the puncture catheterization is smoother, and the position is reached more quickly and accurately.

[0073] 4、The suture needle is increased, the problems of catheter fixation and skin wound suture are solved in one station in clinic, the workload of clinical operation preparation is reduced, and the operation safety and treatment efficiency are improved.

[0074] The above examples only illustrate the technical idea of the utility model, and cannot limit the protection scope of the utility model, and any modification made on the basis of the technical scheme according to the technical idea of the utility model falls within the protection scope of the utility model.

Claims

1. An extracorporeal circulation puncture kit characterized by: The application relates to a package bag body (4) for sealing a dilator (1), a puncture accessory (2) and a suture accessory (3) after sterilization by means of ethylene oxide, wherein the dilator (1) is provided with a dilator head for continuously dilating a blood vessel in stages, and the number of the dilator head on the dilator (1) is adjustable. The dilator (1) comprises a dilator rod (11) and a dilator head arranged on the dilator rod (11), wherein the dilator head comprises a first-stage dilator head (12), a second-stage dilator head (13) and a third-stage dilator head (14), the third-stage dilator head (14) is arranged at the end of the dilator rod (11), and the first-stage dilator head (12) is connected with the second-stage dilator head (13).

2. The extracorporeal circulation puncture kit according to claim 1, characterized in that: The dilator head further comprises a conversion dilator head (17), the second-stage dilator head (13) and the conversion dilator head (17) are replaceably connected with the dilator rod (11), and the dilating stages are adjusted.

3. The extracorporeal circulation puncture kit according to claim 2, characterized in that: The first-stage dilator head (12) comprises a dilating part (16) and a connecting end (18), the dilating part (16) is a conical tube, the connecting end (18) is arranged at one end of the dilating part (16), a connecting platform (19) is arranged on the connecting end (18), and the first-stage dilator head (12) is connected with the second-stage dilator head (13) through the connecting platform (19); the second-stage dilator head (13) and the third-stage dilator head (14) each comprise a dilating part (16) and a buffer part (15), the buffer part (15) is connected with the dilating part (16), the outer diameter of the buffer part (15) is the same as the outer diameter of the smallest end of the dilating part (16), a connecting platform (19) is arranged at the end of the dilating part (16), and the second-stage dilator head (13) and the third-stage dilator head (14) are connected through the connecting platform (19).

4. The extracorporeal circulation puncture kit according to claim 2, characterized in that: The conversion dilator head (17) comprises a dilating part (16) and a connecting end (18), the dilating part (16) is a conical tube, the connecting end (18) is arranged at one end of the dilating part (16), a connecting platform (19) is arranged on the connecting end (18), and the conversion dilator head (17) is connected with the third-stage dilator head (14) through the connecting platform (19).

5. The extracorporeal circulation puncture kit according to claim 1, characterized in that: The puncture accessory (2) comprises a puncture needle (21), a guide wire (22), a scalpel (23) and a syringe (24); the guide wire (22) comprises an inner core, the inner core is movable relative to the guide wire (22), and a hydrophilic hard coating layer is coated on the guide wire (22).

6. The extracorporeal circulation puncture kit according to claim 1, characterized in that: The suture accessory (3) comprises a suture needle (31) and a suture thread (32).

7. An extracorporeal circulation puncture kit characterized by comprising: The application relates to a package bag body (4) for sealing a dilator (1), a puncture accessory (2) and a suture accessory (3) after sterilization by means of ethylene oxide, wherein the dilator (1) is provided with a dilator head for continuously dilating a blood vessel in stages, and the number of the dilator head on the dilator (1) is adjustable.

8. The extracorporeal circulation puncture kit according to claim 7, characterized in that: The expansion tube (5) comprises a first expansion tube (51), a second expansion tube (52), a third expansion tube (53) and a fourth expansion tube (54), and the diameters of the first expansion tube (51), the second expansion tube (52), the third expansion tube (53) and the fourth expansion tube (54) and the diameters of the expansion heads of the end portions are different.

9. The extracorporeal circulation puncture kit according to claim 7, characterized in that: The puncture accessory (2) comprises a puncture needle (21), a guide wire (22), a scalpel (23) and a syringe (24); the guide wire (22) comprises an inner core which is movable relative to the guide wire (22) and is coated with a hydrophilic hardening coating on the guide wire (22).

10. The extracorporeal circulation puncture kit according to claim 7, characterized in that: The suture accessory (3) comprises a suture needle (31) and a suture thread (32).

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