Integrated femoral arteriovenous intubation device and use method thereof

Abstract

The invention discloses an integrated femoral arteriovenous intubation device and a using method thereof, and belongs to the technical field of medical instruments.The integrated femoral arteriovenous intubation device comprises a puncture needle, a drainage apparatus, an intubation piece and a guiding piece, and a first channel is formed in the intubation piece; the first end of the guide piece penetrates through the second end from the first end of the cannula piece, and the puncture needle is sleeved at the first end of the guide piece; the puncture needle comprises a first half tube body and a second half tube body, the first half tube body and the second half tube body are detachably connected, and the drainage device is installed on the first half tube body; a second channel is formed between the inner wall of the first half tube body and the inner wall of the second half tube body, at least part of the guiding piece is arranged in the second channel, and the second channel is communicated with the drainage device and the first channel. A small hole is formed in a blood vessel through a puncture needle, and whether blood vessel selection is correct or not is judged by observing blood color through a drainage device; the puncture needle can be moved out in a tearable mode, the guide piece guides the tube inserting piece to be inserted into a blood vessel, and minimally invasive in-vitro blood circulation is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, in particular to an integrated femoral arteriovenous cannula device and a use method thereof. Background Art

[0002] With the rapid development of cardiac surgery at home and abroad, femoral arteriovenous catheterization is widely used in cardiac surgery. So far, almost all congenital heart disease, coronary heart disease, and valvular disease can be treated through traditional extracorporeal circulation surgery. Femoral arteriovenous catheterization is an indispensable part of extracorporeal circulation surgery and is suitable for surgical operations with extracorporeal blood pathways, connecting the patient's arterial or venous system with the extracorporeal circulation pipeline.

[0003] At the same time, with the continuous development of medical technology, in addition to pursuing good surgical results, the industry also hopes to reduce surgical risks and consider the aesthetics of wounds after healing; therefore, cardiac surgery, like other fields, has also become an inevitable trend to develop in the direction of minimally invasive surgery. At the same time, how to quickly perform minimally invasive puncture and intubation in a non-surgical environment is a difficult problem that needs to be overcome. Summary of the invention

[0004] The purpose of the present invention is to improve the problem that the existing puncture tube cannulation cannot be performed in a minimally invasive and rapid insertion manner for extracorporeal blood circulation, and to provide an integrated femoral artery and vein cannulation device and a method for using the same.

[0005] The technical solutions to achieve the above objectives include the following:

[0006] Integrated femoral arteriovenous cannulation device, including:

[0007] A puncture needle, a drainage device, a cannula, and a guide, wherein a first channel is formed in the cannula; the first end of the guide runs through the first end of the cannula to the second end, the puncture needle is sleeved on the first end of the guide, and the second end of the guide abuts against the second end of the cannula;

[0008] The puncture needle comprises a first half-tube body and a second half-tube body, the first half-tube body is detachably connected to the second half-tube body, and the flow guider is installed on the first half-tube body or the second half-tube body;

[0009] A second channel is formed between the inner walls of the first half tube and the second half tube, the guide is at least partially disposed in the second channel, and the second channel is communicated with the flow guider and the first channel respectively.

[0010] In one embodiment, the puncture needle further includes a first picking portion and a second picking portion, wherein the first picking portion is mounted on the side wall of the first half tube, and the second picking portion is mounted on the side wall of the second half tube, and a V-shaped groove is provided between the first half tube and the second half tube, and the V-shaped groove is extended along the length direction of the first half tube or the second half tube;

[0011] The first half tube body is provided with a protrusion, and the second half tube body is provided with a slot matched with the protrusion.

[0012] In one embodiment, the puncture needle includes a needle tube and a needle seat, the first picking portion and the second picking portion are arranged on the needle seat, the needle tube is installed on the needle seat, and the outer diameter of the needle tube is smaller than the outer diameter of the needle seat.

[0013] In one embodiment, the drainage device includes a drainage tube, a first connector, and a throttle valve, wherein the first end of the drainage tube is connected to the second channel, the first connector is installed at the second end of the drainage tube, and the first connector is provided with an outlet, and the outlet is connected to the second end of the drainage tube;

[0014] The throttle valve is installed on the first joint, and the throttle valve is arranged between the outlet and the drainage pipe.

[0015] In one embodiment, the cannula device further comprises an expansion member, the expansion member is sleeved outside the guide member, and the expansion member is disposed between the puncture needle and the cannula member, and the cross-sectional area of ​​the expansion member gradually increases from the first end to the second end of the expansion member;

[0016] The expansion piece includes a third half tube body and a fourth half tube body, the third half tube body and the fourth half tube body are detachably connected, a third channel is formed between the inner walls of the third half tube body and the fourth half tube body, and the third channel is connected to the first channel.

[0017] In one embodiment, the guide member includes an outer tube and a guide needle, the outer tube is sleeved outside the guide needle, the insertion tube member is sleeved outside the outer tube, the guide needle passes through the first end of the outer tube to the second end, and the guide needle is at least partially disposed in the second channel;

[0018] The length of the outer tube is greater than that of the insert tube piece, the first end of the outer tube has a guide portion, the second end of the outer tube has a blocking portion, and the blocking portion is used to abut against the insert tube piece; the outer diameter of the guide portion is smaller than the inner diameter of the insert tube piece, the guide portion is exposed relative to the insert tube piece, and the cross-sectional area of ​​the guide portion gradually increases from the first end to the second end of the guide portion, and the smallest end of the guide portion is away from the insert tube piece.

[0019] In one embodiment, the guide needle includes a forming wire and a core wire, wherein the forming wire is spirally shaped and wound around the core wire;

[0020] One end of the molding wire close to the second channel has a contact head, the contact head is in a spherical shape, and the outer arc surface of the contact head faces the second channel.

[0021] In one embodiment, the cannula comprises a first catheter, a second catheter, and a second connector, the first catheter is mounted on a first end of the second catheter, the second connector is mounted on a second end of the second catheter, and the outer diameter of the first catheter is smaller than the outer diameter of the second catheter;

[0022] The side wall of the first conduit has a plurality of guide holes, the plurality of guide holes are arranged along the length direction of the first conduit, and the plurality of guide holes are arranged close to the second channel;

[0023] The end of the first conduit close to the second channel also has scale marks.

[0024] In one embodiment, the cannula further comprises a one-way valve, the one-way valve is installed in the second conduit, and the one-way valve is arranged between the first conduit and the second connector;

[0025] The one-way valve comprises a first one-way flap, a second one-way flap and a third one-way flap, wherein the first ends of the first one-way flap, the second one-way flap and the third one-way flap are mounted on the inner wall of the second tube body, and the second ends of the first one-way flap, the second one-way flap and the third one-way flap are inclined toward the first conduit;

[0026] There are gaps between the first one-way flap and the second one-way flap, between the second one-way flap and the third one-way flap, and between the third one-way flap and the first one-way flap, and all the gaps are connected to form a herringbone opening.

[0027] The present invention also provides a method for using the integrated femoral arteriovenous cannulation device, comprising the following steps:

[0028] Step 1: Determine the target blood vessel;

[0029] Step 2: insert the puncture needle into the blood vessel and determine the blood vessel type based on the blood discharged from the target blood vessel through the drainage device;

[0030] Step 3: When the blood vessel type is correct, insert the guide into the second channel, tear apart the first half tube and the second half tube, withdraw the puncture needle from the blood vessel, and keep the guide in the blood vessel;

[0031] Step 4: The cannula is moved outside the guide toward the blood vessel and inserted into the blood vessel to connect the blood vessel with the first channel, and the guide is removed.

[0032] The technical solution provided by the present invention has the following advantages and effects:

[0033] A puncture needle is used to make a small hole in the blood vessel, and the blood color is observed through the drainage device to determine whether the blood vessel selection is correct. If the blood vessel selection is wrong, it can be selected again, and the opening of the small hole causes less damage to the blood vessel. When the blood vessel is selected correctly, when the puncture needle is withdrawn, the first half of the tube body and the second half of the tube body can be torn apart, and the guide piece gradually guides the insertion of the cannula into the blood vessel, so that the cannula can be quickly connected to the blood vessel, and minimally invasive extracorporeal blood circulation can be quickly achieved while reducing damage to the blood vessel. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings herein show specific examples of the technical solutions described in the present invention, and together with the specific implementation methods, constitute a part of the specification, and are used to explain the technical solutions, principles and effects of the present invention.

[0035] Unless otherwise specified or defined, the same figure marks in different drawings represent the same or similar technical features, and the same or similar technical features may also be represented by different figure marks.

[0036] Figure 1 is a schematic diagram of an integrated femoral arteriovenous cannulation device according to an embodiment of the present invention;

[0037] Figure 2 is a cross-sectional view of an integrated femoral arteriovenous cannulation device according to an embodiment of the present invention;

[0038] Figure 3 is a schematic diagram of a puncture needle in one embodiment of the present invention;

[0039] Figure 4 In one embodiment of the present invention Figure 3 AA section view;

[0040] Figure 5 is a schematic diagram of a first half tube and a second half tube in one embodiment of the present invention;

[0041] Figure 6 In one embodiment of the present invention Figure 4 BB cross-sectional view;

[0042] Figure 7 In one embodiment of the present invention Figure 4 CC section view;

[0043] Figure 8 is a schematic diagram of an expansion member in one embodiment of the present invention;

[0044] Fig. 9 is a schematic diagram of an inserting tube member in one embodiment of the present invention;

[0045] Fig.10 In one embodiment of the present invention Figure 8 AA cross-section diagram;

[0046] Fig.11 In one embodiment of the present invention Fig.10 BB cross-sectional view;

[0047] Fig.12 is a schematic diagram of a guide member in one embodiment of the present invention;

[0048] Fig.13 is a schematic diagram of a guide needle in one embodiment of the present invention;

[0049] Description of reference numerals:

[0050] 100. Intubation device;

[0051] 1. puncture needle; 101. second channel; 11. needle tube; 12. needle seat; 111. first pick-up portion; 112. first half tube body; 113. second pick-up portion; 114. second half tube body; 115. protrusion; 116. slot; 117. V-shaped groove;

[0052] 2. expansion member; 201. third channel; 21. third half tube; 22. fourth half tube;

[0053] 3. Insertion member; 301. First channel; 31. Second joint; 32. First conduit; 321. Guide hole; 322. Scale mark; 33. Second conduit; 34. One-way valve; 341. First one-way flap; 342. Second one-way flap; 343. Third one-way flap; 344. Opening;

[0054] 4. guide member; 41. guide needle; 411. contact head; 412. forming wire; 413. core wire; 42. outer tube; 43. guide part; 44. blocking part;

[0055] 5. Drainage device; 51. Drainage tube; 52. First joint; 53. Throttle valve; 54. Outlet. DETAILED DESCRIPTION

[0056] In order to facilitate the understanding of the present invention, specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings.

[0057] Unless otherwise specified or defined, the "first, second..." used in this article is merely used to distinguish names and does not represent a specific quantity or order.

[0058] Unless specifically stated or defined otherwise, the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0059] It should be noted that when a component is considered to be "fixed to" another component, it can be directly fixed to the other component or there can be a central component; when an component is considered to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time; when an component is considered to be "installed on" another component, it can be directly installed on the other component or there can be a central component at the same time. When an component is considered to be "set on" another component, it can be directly set on the other component or there can be a central component at the same time.

[0060] Embodiment 1

[0061] The present invention provides an integrated femoral arteriovenous cannulation device 100, such as Figures 1 to 4 As shown, it includes a puncture needle 1, a drain 5, a cannula member 3, and a guide member 4. The cannula member 3 is a hollow structure, and a first channel 301 is formed in the cannula member 3; the first end of the guide member 4 passes through the first end of the cannula member 3 to the second end, the puncture needle 1 is sleeved on the first end of the guide member 4, and the second end of the guide member 4 abuts against the second end of the cannula member 3; the puncture needle 1 includes a first half tube body 112 and a second half tube body 114, the first half tube body 112 and the second half tube body 114 are detachably connected, and the drain 5 is installed on the first half tube body 112 or the second half tube body 114; wherein, a second channel 101 is formed between the inner walls of the first half tube body 112 and the second half tube body 114, the guide member 4 is at least partially arranged in the second channel 101, and the second channel 101 is respectively connected to the drain 5 and the first channel 301.

[0062] Specifically, when the integrated femoral arteriovenous catheter device 100 is used, the puncture needle 1 punctures the blood vessel, and blood flows into the second channel 101, a portion of which is discharged through the drain 5. By observing the color of the blood discharged from the drain 5, it can be clearly understood whether the blood vessel belongs to an artery or a vein, and the drain 5 can be used to determine whether the blood vessel selection is correct. If the inserted blood vessel is correct, the guide member 4 is extended into the second channel 101, and the cannula member 3 is also moved toward the blood vessel through the guide member 4, and the first half tube body 112 and the second half tube body 114 of the puncture needle 1 are detachably connected. By tearing the first half tube body 112 and the second half tube body 114 in opposite directions, during the tearing process, the puncture needle 1 slowly withdraws from the blood vessel, and the guide member 4 is always located in the blood vessel, the first half tube body 112 and the second half tube body 114 are slowly torn apart, and the end of the cannula member 3 close to the puncture needle 1 is slowly pushed toward the blood vessel. After the puncture needle 1 is completely withdrawn, one end of the cannula member 3 is inserted into the blood vessel, so that the blood in the blood vessel flows into the first channel 301, so that the blood in the blood vessel is connected with the outside world through the cannula member 3, thereby realizing the extracorporeal circulation of blood.

[0063] Moreover, since the blood pressure of the artery is higher than that of the vein, in some embodiments, if the puncture needle 1 is inserted into the artery, the cannula 3 can be used to drain the blood from the blood vessel; if the puncture needle 1 is inserted into the vein, the cannula 3 can be used to transport the external liquid into the blood vessel. This puncture needle 1 is disassembled in a tearable manner to separate the first half tube body 112 from the second half tube body 114. The puncture needle 1 can be used to open a small hole in the blood vessel, and the blood color can be observed through the drain 5 to determine whether the blood vessel selection is correct. If the blood vessel selection is wrong, the selection can be repeated, and the opening of the small hole will cause less damage to the blood vessel. When the blood vessel selection is correct, when the puncture needle 1 is withdrawn, the first half tube body 112 and the second half tube body 114 can be torn, and the guide 4 gradually guides the cannula 3 to be inserted into the blood vessel, so that the cannula 3 can be quickly connected to the blood vessel, and minimally invasive extracorporeal blood circulation can be quickly achieved while reducing damage to the blood vessel.

[0064] In some embodiments, Figures 3 to 7 As shown, the puncture needle 1 also includes a first picking portion 111 and a second picking portion 113. The first picking portion 111 is installed on the side wall of the first half tube body 112, and the second picking portion 113 is installed on the side wall of the second half tube body 114. A V-shaped groove 117 is provided between the first half tube body 112 and the second half tube body 114, and the V-shaped groove 117 extends along the length direction of the first half tube body 112 or the second half tube body 114; the first half tube body 112 has a protrusion 115, and the second half tube body 114 has a groove 116 that cooperates with the protrusion 115. Specifically, the operator clamps the first picking portion 111 and the second picking portion 113 with fingers, so that the operator can apply pulling force from opposite directions to separate and tear the first half tube body 112 from the second half tube body 114; and there is a V-shaped groove 117 between the first half tube body 112 and the second half tube body 114, so that the first half tube body 112 and the second half tube body 114 start to separate from the V-shaped groove 117, making it easier to tear the first half tube body 112 and the second half tube body 114 to avoid the puncture needle 1 from breaking. By using the V-shaped groove 117, when the applied force remains consistent, the first half tube body 112 and the second half tube body 114 maintain a uniform speed during the tearing process, avoiding excessive force caused by unreasonable structural design.

[0065] When processing the puncture needle 1, the puncture needle 1 is cut so that a protrusion 115 is reserved on the first half tube body 112 and a slot 116 is reserved on the second half tube body 114. The protrusion 115 cooperates with the slot 116 so that the overall structure of the puncture needle 1 is in a relatively stable state after the puncture needle 1 is cut; when the first picking portion 111 and the second picking portion 113 are subjected to a force, the protrusion 115 separates from the slot 116, so that the first half tube body 112 and the second half tube body 114 are torn apart.

[0066] Preferably, Figure 3 and Figure 4 As shown, the puncture needle 1 includes a needle tube 11 and a needle seat 12, a first pick-up portion 111 and a second pick-up portion 113 are arranged on the needle seat 12, the needle tube 11 is installed on the needle seat 12, and the outer diameter of the needle tube 11 is smaller than the outer diameter of the needle seat 12. Specifically, the aperture of the needle tube 11 is small, and one end of the needle tube 11 is spike-shaped, which is convenient for inserting into a blood vessel; and the needle seat 12 is convenient for the operator to pick up and apply force to the needle seat 12, so that the needle tube 11 punctures the blood vessel.

[0067] In some embodiments, Figure 3 As shown, the drainage device 5 includes a drainage tube 51, a first connector 52, and a throttle valve 53. The first end of the drainage tube 51 is connected to the second channel 101. The first connector 52 is installed at the second end of the drainage tube 51. The first connector 52 is provided with an outlet 54, which is connected to the second end of the drainage tube 51. The throttle valve 53 is installed on the first connector 52, and the throttle valve 53 is arranged between the outlet 54 and the drainage tube 51. Specifically, when the puncture needle 1 is inserted into the blood vessel, the blood in the blood vessel flows into the second channel 101, flows into the first connector 52 through the drainage tube 51, and is discharged from the outlet 54 of the first connector 52. A transparent container can be used to collect the blood, so that the operator can observe the color of the blood flowing out of the outlet 54 and judge whether the puncture needle 1 is inserted into an artery or a vein. If the blood vessel is inserted correctly, the throttle valve 53 can be used to close the channel of the first connector 52 to prevent blood from flowing out of the outlet 54.

[0068] In some embodiments, Figure 1 and 8 As shown, the cannula device 100 also includes an expansion member 2, which is sleeved on the outside of the guide member 4 and is arranged between the puncture needle 1 and the cannula member 3. The cross-sectional area of ​​the expansion member 2 gradually increases from the first end to the second end of the expansion member 2; the expansion member 2 moves through the guide member 4 and inserts the smaller end into the blood vessel. As the puncture needle 1 continuously withdraws from the blood vessel and tears open, the expansion member 2 gradually moves to the deep part of the blood vessel; and, through the structural shape of the expansion member 2, as the expansion member 2 is inserted into the depth of the blood vessel, the expansion member 2 expands the blood vessel so that the opening of the blood vessel reaches a preset aperture.

[0069] In addition, if Figure 8As shown, the expansion member 2 includes a third half-tube body 21 and a fourth half-tube body 22, the third half-tube body 21 and the fourth half-tube body 22 are detachably connected, a third channel 201 is formed between the inner walls of the third half-tube body 21 and the fourth half-tube body 22, and the third channel 201 is connected to the first channel 301. After the front end of the expansion member 2 has finished expanding the blood vessel, the insertion member 3 is brought close to the rear end of the expansion member 2, the third half-tube body 21 and the fourth half-tube body 22 can be slowly withdrawn from the blood vessel in a tearable manner, and the insertion member 3 moves toward the blood vessel, so that the insertion member 3 is inserted into the expanded blood vessel. After the blood vessel is expanded, the flow rate of the blood vessel flowing into the insertion member 3 is increased, further realizing the extracorporeal circulation of blood.

[0070] In some embodiments, Fig.12 As shown, the guide member 4 includes an outer tube 42 and a guide needle 41, the outer tube 42 is sleeved on the outside of the guide needle 41, the cannula member 3 is sleeved on the outside of the outer tube 42, the guide needle 41 passes through the first end of the outer tube 42 to the second end, and the guide needle 41 is at least partially arranged in the second channel 101; this guide needle 41 is used to connect the puncture needle 1, the expansion member 2, and the cannula member 3 in series, and the guide needle 41 is used to guide the expansion member 2 into the second channel 101 of the puncture needle 1, as the puncture needle 1 is completely withdrawn from the blood vessel, the expansion member 2 is inserted into the blood vessel and the opening of the blood vessel is expanded; then, the cannula member 3 is guided by the guide needle 41 to enter the third channel 201 of the expansion member 2 201, and as the expansion member 2 is withdrawn, the cannula member 3 is inserted into the opening of the blood vessel.

[0071] In addition, the length of the outer tube 42 is greater than the length of the cannula 3, the first end of the outer tube 42 has a guide portion 43, and the second end of the outer tube 42 has a blocking portion 44, and the blocking portion 44 is used to abut against the cannula 3; the outer diameter of the guide portion 43 is smaller than the inner diameter of the cannula 3, the guide portion 43 is exposed relative to the cannula 3, and the cross-sectional area of ​​the guide portion 43 gradually increases from the first end to the second end of the guide portion 43, and the smallest end of the guide portion 43 is far away from the cannula 3. Specifically, the blocking portion 44 is used to abut against the cannula 3, so that the operator picks up the blocking portion 44 and inserts the guide portion 43 into the blood vessel or the third channel 201, and the guide portion 43 enters the blood vessel, so that the cannula 3 enters the blood vessel through the guide portion 43, and the cannula 3 is connected with the blood vessel. Moreover, the outer tube 42 is sleeved on the outside of the guide needle 41, so that the outer tube 42 can limit the range of movement of the guide needle 41 in the insertion tube 3. The guide needle 41 needs to be inserted into the outer tube 42, the insertion tube 3, the expansion member 2, and the puncture needle 1 in sequence. The outer diameter of the guide needle 41 is small, and its own support is relatively weak. Since the inner diameter of the insertion tube 3 is large, the guide needle 41 encounters resistance and is easy to bend in the insertion tube 3. After bending, the guide needle 41 cannot move at the smaller end of the insertion tube 3, so the guide needle 41 will not be pushed into the third channel 201 and the second channel 101 in sequence, resulting in failure of the femoral artery cannulation operation. Therefore, by sleeve-connecting the outer tube 42 to the outside of the guide needle 41, the supporting strength of the guide needle 41 in the insertion tube component 3 can be improved, and the guide needle 41 can be prevented from bending to form an elbow in the insertion tube component 3. The guide needle 41 is pushed to the expansion member 2 and the puncture needle 1 to achieve the function of guiding the insertion tube component 3. The inner diameters of the expansion member 2 and the puncture needle 1 are relatively small, and the guide needle 41 is not easy to bend in the expansion member 2 and the puncture needle 1. Therefore, the effect of the outer tube 42 on the guide needle 41 is very obvious. In actual application scenarios, the outer tube 42 has great practical significance and value.

[0072] Preferably, Fig.13 As shown, the guide needle 41 includes a forming wire 412 and a core wire 413, the forming wire 412 is spirally shaped and is wound around the core wire 413; the core wire 413 is used to increase the support strength of the guide needle 41, and the forming wire 412 is wound in a spiral shape, so that the outer wall of the forming wire 412 has multiple outer arc surfaces, reducing the friction between the guide wire 41 and the blood vessel; the forming wire 412 can be made of a flexible material to avoid direct contact between the harder core wire 413 and the inner wall of the blood vessel, thereby reducing damage to the blood vessel. The forming wire 412 has a contact head 411 at one end close to the second channel 101, and the contact head 411 is spherical, with the outer arc surface of the contact head 411 facing the second channel 101. The spherical surface of the contact head 411 is used to contact the inner wall of the blood vessel, reducing the friction resistance between the contact head 411 and the inner wall of the blood vessel.

[0073] In some embodiments, Fig. 9 and Fig.10As shown, the cannula 3 includes a first catheter 32, a second catheter 33, and a second connector 31. The first catheter 32 is installed at the first end of the second catheter 33, and the second connector 31 is installed at the second end of the second catheter 33. The outer diameter of the first catheter 32 is smaller than the outer diameter of the second catheter 33. The side wall of the first catheter 32 has a plurality of flow guide holes 321, which are arranged along the length direction of the first catheter 32, and the plurality of flow guide holes 321 are arranged near the second channel 101. The end of the first catheter 32 near the second channel 101 also has a scale mark 322. Specifically, the plurality of flow guide holes 321 are used to communicate with the blood vessel, increase the conduction area between the first catheter 32 and the blood vessel, increase the flow rate of the first catheter 32, and make the blood in the blood vessel flow into the first catheter 32 through the flow guide holes 321. The scale mark 322 of the first catheter 32 is also used to show the depth of the cannula 3 inserted into the blood vessel. The blood in the first catheter 32 flows into the second catheter 33 and flows to the second connector 31. The second connector 31 is used to connect to external equipment, such as an infusion bag. In this embodiment, the cannula 3 is suitable for communicating with a vein.

[0074] The present invention also provides a method for using the integrated femoral arteriovenous cannulation device 100, comprising the following steps:

[0075] Step 1: Determine the target blood vessel;

[0076] Step 2: insert the puncture needle 1 into the blood vessel, and determine the blood vessel type based on the blood discharged from the target blood vessel from the drainage device 5;

[0077] Step 3: When the blood vessel type is correct, insert the guide 4 into the second channel 101, tear apart the first half tube 112 and the second half tube 114, withdraw the puncture needle 1 from the blood vessel, and keep the guide 4 in the blood vessel;

[0078] Step 4: The cannula 3 is moved outside the guide member 4 toward the blood vessel, and inserted into the blood vessel to connect the blood vessel with the first channel 301 , and then the guide member 4 is removed.

[0079] Through the above-mentioned method of use, the cannula device 100 can be inserted into the correct blood vessel, and then the cannula component 3 can be guided to communicate with the blood vessel through the guide component 4, thereby reducing damage to the blood vessel and quickly achieving extracorporeal blood circulation.

[0080] Embodiment 2

[0081] In some embodiments, Fig.10 and Fig.11As shown, when the cannula device 100 needs to be connected to an arterial blood vessel, due to the high arterial blood pressure, the blood in the blood vessel is easily sprayed toward the cannula member 3 and sprayed out from the tail end of the cannula member 3. Therefore, in order to avoid this phenomenon. The cannula member 3 also has a one-way valve 34, which is installed in the second conduit 33, and the one-way valve 34 is arranged between the first conduit 32 and the second connector 31; this one-way valve 34 separates the chamber of the cannula member 3, so that the liquid can only flow into the blood vessel from the second connector 31, and the one-way valve 34 forms an obstacle to the flow of blood, and the blood in the blood vessel cannot be sprayed out from the tail end of the cannula member 3. Therefore, when the cannula device 100 is connected to an arterial blood vessel, it is generally used for external circulation from external infusion to the blood vessel.

[0082] Moreover, if Fig.11 As shown, the one-way valve 34 includes a first one-way flap 341, a second one-way flap 342, and a third one-way flap 343. The first one-way flap 341, the second one-way flap 342, and the third one-way flap 343 are all installed on the inner wall of the second tube body 33. There are gaps between the first one-way flap 341 and the second one-way flap 342, between the second one-way flap 342 and the third one-way flap 343, and between the third one-way flap 343 and the first one-way flap 341. The gaps are connected to form a herringbone opening 344. When the blood in the arterial blood vessel flows to the one-way valve 34, the pressure of the blood pushes the second ends of the first one-way flap 341, the second one-way flap 342, and the third one-way flap 343 to move, so that the second ends of the first one-way flap 341, the second one-way flap 342, and the third one-way flap 343 are close to each other, thereby sealing the gaps to prevent blood from flowing out of the one-way valve 34. When external liquid enters the cannula 3 through the second connector 31, the liquid exerts pressure on the first one-way valve 341, the second one-way valve 342, and the third one-way valve 343, so that the gaps between the first one-way valve 341 and the second one-way valve 342, between the second one-way valve 342 and the third one-way valve 343, and between the third one-way valve 343 and the first one-way valve 341 become larger, thereby facilitating the transportation of liquid from the cannula 3 to the blood vessel.

[0083] It should be noted that in the cannulation device 100, the puncture needle 1 is inserted into the blood vessel, and the type of the inserted blood vessel is determined by the blood flowing out of the drain 5. After the blood vessel type is determined, the cannulation member 3 is guided to cooperate with the puncture needle 1 through the guide 4; the puncture needle 1 is withdrawn from the blood vessel in a tearable manner, and the cannulation member 3 is guided to be inserted into the blood vessel, thereby reducing the damage to the blood vessel and realizing blood circulation outside the body by minimally invasive insertion into the blood vessel. In the cannulation device 100, the tearable puncture needle 1 is inserted into the blood vessel, and the type of the inserted blood vessel is determined by the drain 5, and the cannulation member 3 enters the blood vessel through the guide 4, all of which are within the scope of protection of this application.

[0084] When quoting drawing descriptions, new features that appear are described; in order to avoid repeated quotations of drawings resulting in less concise descriptions, features that have been described clearly will not be quoted in the drawings one by one.

[0085] The purpose of the above embodiments is to exemplarily reproduce and deduce the technical solution of the present invention, and to fully describe the technical solution, purpose and effect of the present invention. Its purpose is to make the public understand the disclosed content of the present invention more thoroughly and comprehensively, and it does not limit the scope of protection of the present invention.

[0086] The above embodiments are not exhaustive enumerations of the present invention, and there may be multiple other implementations not listed. Any replacement and improvement made without violating the concept of the present invention shall fall within the protection scope of the present invention.

Claims

1. An integrated femoral arteriovenous cannulation device, characterized in that: include: A puncture needle, a drainage device, a cannula, and a guide, wherein a first channel is formed in the cannula; the first end of the guide runs through the first end of the cannula to the second end, the puncture needle is sleeved on the first end of the guide, and the second end of the guide abuts against the second end of the cannula; The puncture needle comprises a first half-tube body and a second half-tube body, the first half-tube body is detachably connected to the second half-tube body, and the flow guider is installed on the first half-tube body or the second half-tube body; A second channel is formed between the inner walls of the first half tube and the second half tube, the guide is at least partially disposed in the second channel, and the second channel is communicated with the flow guider and the first channel respectively.

2. The integrated femoral arteriovenous cannulation device according to claim 1, characterized in that: The puncture needle further comprises a first picking-up portion and a second picking-up portion, wherein the first picking-up portion is mounted on the side wall of the first half-tube body, and the second picking-up portion is mounted on the side wall of the second half-tube body, and a V-shaped groove is provided between the first half-tube body and the second half-tube body, and the V-shaped groove is extended along the length direction of the first half-tube body or the second half-tube body; The first half tube body is provided with a protrusion, and the second half tube body is provided with a slot matched with the protrusion.

3. The integrated femoral arteriovenous cannulation device according to claim 2, characterized in that: The puncture needle comprises a needle tube and a needle seat, the first picking portion and the second picking portion are arranged on the needle seat, the needle tube is installed on the needle seat, and the outer diameter of the needle tube is smaller than the outer diameter of the needle seat.

4. The integrated femoral arteriovenous cannulation device according to claim 1, characterized in that: The drainage device comprises a drainage tube, a first joint, and a throttle valve, wherein the first end of the drainage tube is connected to the second channel, the first joint is installed at the second end of the drainage tube, and the first joint is provided with an outlet, which is connected to the second end of the drainage tube; The throttle valve is installed on the first joint, and the throttle valve is arranged between the outlet and the drainage pipe.

5. The integrated femoral arteriovenous cannulation device according to claim 1, characterized in that: The cannula device further comprises an expansion member, which is sleeved outside the guide member and arranged between the puncture needle and the cannula member, and the cross-sectional area of ​​the expansion member gradually increases from the first end to the second end of the expansion member; The expansion piece includes a third half tube body and a fourth half tube body, the third half tube body and the fourth half tube body are detachably connected, a third channel is formed between the inner walls of the third half tube body and the fourth half tube body, and the third channel is connected to the first channel.

6. The integrated femoral arteriovenous cannulation device according to claim 1, characterized in that: The guide member comprises an outer tube and a guide needle, the outer tube is sleeved on the outside of the guide needle, the insertion tube member is sleeved on the outside of the outer tube, the guide needle passes through the first end of the outer tube to the second end, and the guide needle is at least partially disposed in the second channel; The length of the outer tube is greater than that of the insert tube piece, the first end of the outer tube has a guide portion, the second end of the outer tube has a blocking portion, and the blocking portion is used to abut against the insert tube piece; the outer diameter of the guide portion is smaller than the inner diameter of the insert tube piece, the guide portion is exposed relative to the insert tube piece, and the cross-sectional area of ​​the guide portion gradually increases from the first end to the second end of the guide portion, and the smallest end of the guide portion is away from the insert tube piece.

7. The integrated femoral arteriovenous cannulation device according to claim 6, characterized in that: The guide needle comprises a forming wire and a core wire, wherein the forming wire is spirally shaped and wound around the core wire; One end of the molding wire close to the second channel has a contact head, the contact head is in a spherical shape, and the outer arc surface of the contact head faces the second channel.

8. The integrated femoral arteriovenous cannulation device according to claim 1, characterized in that: The cannula assembly comprises a first catheter, a second catheter, and a second connector, wherein the first catheter is mounted on a first end of the second catheter, the second connector is mounted on a second end of the second catheter, and an outer diameter of the first catheter is smaller than an outer diameter of the second catheter; The side wall of the first conduit has a plurality of guide holes, the plurality of guide holes are arranged along the length direction of the first conduit, and the plurality of guide holes are arranged close to the second channel; The end of the first conduit close to the second channel also has scale marks.

9. The integrated femoral arteriovenous cannulation device according to claim 8, characterized in that: The cannula member also has a one-way valve, which is installed in the second conduit and arranged between the first conduit and the second connector; The one-way valve comprises a first one-way flap, a second one-way flap and a third one-way flap, wherein the first ends of the first one-way flap, the second one-way flap and the third one-way flap are mounted on the inner wall of the second tube body, and the second ends of the first one-way flap, the second one-way flap and the third one-way flap are inclined toward the first conduit; There are gaps between the first one-way flap and the second one-way flap, between the second one-way flap and the third one-way flap, and between the third one-way flap and the first one-way flap, and all the gaps are connected to form a herringbone opening.

10. A method for using the integrated femoral arteriovenous cannulation device, characterized in that: The following steps are involved: Identify target vessels; Insert the puncture needle into the blood vessel and determine the type of blood vessel based on the blood discharged from the target blood vessel by the drainage device; When the blood vessel type is correct, the guide is inserted into the second channel, the first half tube body and the second half tube body are torn apart, the puncture needle is withdrawn from the blood vessel, and the guide is always located in the blood vessel; The cannula is moved outside the guide toward the blood vessel and inserted into the blood vessel to connect the blood vessel with the first channel, and then the guide is removed.

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