Safety Vascular Puncture Sheath

Abstract

The present invention provides a safe vascular puncture sheath, comprising a puncture needle, a sheath tube and a safety sleeve, wherein the puncture needle comprises a hollow needle tube and a needle seat at the tail of the needle tube, the sheath tube comprises a hollow sheath tube and a wing handle at the tail of the sheath tube, the hollow sheath tube is sleeved on the outer surface of the hollow needle tube, the inner wall of one end of the tube body of the safety sleeve is provided with a baffle perpendicular to the axis of the tube body, the baffle is provided with a through hole matching the outer diameter of the hollow needle tube, the needle seat is located on the side of the baffle close to the center of the safety sleeve, the wing handle is located on the side of the baffle away from the center of the safety sleeve, a spring is provided between the needle seat and the baffle, the safety sleeve is also provided with an excitation device for releasing the spring, and the excitation device matches the needle seat. The beneficial effect of the present invention is that due to the adoption of the above technical solution, the structure of the vascular puncture sheath is stable and safer to use.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, in particular to a safe blood vessel puncture sheath. Background Art

[0002] With the continuous development of medical technology, there are more and more surgical methods for peripheral intravenous infusion therapy and percutaneous intravenous interventional surgery. Among them, peripheral intravenous catheterization, percutaneous transluminal coronary angioplasty and other similar surgeries are now widely used in clinical practice. These surgeries will introduce medical devices into the corresponding human blood vessels. Among them, the Seldinger technique is widely used. The puncture needle is inserted into the artery or vein, and then the guide wire is introduced into the artery or vein through the inner cavity of the puncture needle, and the puncture needle is removed. The dilator is passed through the catheter sheath hemostatic valve into the catheter sheath lumen. Both have a tubular structure. Both are locked at the proximal end by a locking structure and enter the artery or vein together. After the sheath position is fixed, the dilator is withdrawn. Finally, the catheter sheath can be used as a channel for entering, exiting or replacing various interventional equipment.

[0003] The puncture needle is a commonly used puncture tool in clinical practice and is also an important component of the vascular puncture sheath. In interventional treatment, in addition to the puncture needle, the puncture sheath is also an indispensable puncture component. During the operation, the relative fixation between the puncture needle and the puncture sheath is very important. After the puncture is completed, the relative separation of the puncture needle and the sheath also needs to be convenient to a certain extent.

[0004] In addition, after the puncture needle completes the puncture action, it has the patient's body fluids, blood, etc., which are sources of contamination, and the safety of its storage and handling needs to be paid attention to. Summary of the invention

[0005] The purpose of the present invention is to provide a blood vessel puncture sheath with stable structure and safe use.

[0006] The technical solution of the present invention is:

[0007] A safety vascular puncture sheath comprises a puncture needle, a sheath tube and a safety sleeve, wherein the puncture needle comprises a hollow needle tube and a needle seat at the tail of the needle tube, the sheath tube comprises a hollow sheath tube and a wing handle at the tail of the sheath tube, the hollow sheath tube is sleeved on the outer surface of the hollow needle tube, an inner wall of one end of the tube body of the safety sleeve is provided with a baffle perpendicular to the axis of the tube body, the baffle is provided with a through hole matching the outer diameter of the hollow needle tube, the needle seat is located on a side of the baffle close to the center of the safety sleeve, the wing handle is located on a side of the baffle away from the center of the safety sleeve, a spring is provided between the needle seat and the baffle, and the safety sleeve is also provided with an excitation device for releasing the spring, and the excitation device matches the needle seat.

[0008] In addition to ensuring the basic functions of the vascular puncture sheath, the vascular puncture sheath of the present invention is provided with a safety sleeve for safely and conveniently handling the puncture needle after puncture. One end of the safety sleeve of the present invention is closed by a baffle, and a through hole is provided on the baffle for the puncture needle tube to pass through. The needle seat of the puncture needle is located in the safety sleeve, and the hollow needle tube extends out of the safety sleeve through the through hole and is combined with the sheath tube outside the safety sleeve. After use, the puncture needle retreats into the safety sleeve under the action of the spring, and the used puncture needle is safely handled.

[0009] The excitation device includes a button, a connecting ring and a limiting protrusion. The outer diameter of the connecting ring matches the inner diameter of the safety sleeve. The button and the limiting protrusion are symmetrical with each other about any axial section of the connecting ring. The button is installed on the outer side of the connecting ring, and the limiting protrusion is installed on the inner side of the connecting ring. The needle seat is provided with a limiting groove matching the limiting protrusion.

[0010] The operation of the excitation device relies on a connecting ring that can move in the safety sleeve. The connecting ring is connected to the button and the limiting protrusion respectively. The limiting protrusion cooperates with the limiting groove on the needle seat. The safety sleeve corresponding to the connecting ring at the groove is hollowed out. When the button is pressed, the connecting ring moves toward the hollow part of the safety sleeve, the limiting protrusion moves out of the limiting groove, and the puncture needle retreats into the safety sleeve under the action of the spring.

[0011] The number of the wing handles is two, and the two wing handles are symmetrical with respect to any axial section of the hollow sheath. When the interventional device completes the intervention, the sheath needs to be withdrawn, and the withdrawal method of the sheath is to tear the tube body of the sheath from the middle, and the wing handle provides a fulcrum for tearing the sheath and withdrawing it.

[0012] The wing handle is connected to the hollow sheath tube through an arc-shaped piece perpendicular to the wing handle. The arc-shaped piece cooperates with the outer surface of the hollow sheath tube. The wing handle and the arc-shaped piece are integrally injection-molded. The arc-shaped piece provides a link between the wing handle and the sheath tube. In addition, two symmetrical gaps are left between the two arc-shaped pieces corresponding to the two wing handles, which provide guidance for the tearing direction of the sheath tube.

[0013] The width of the wing handle is smaller than the diameter of the safety sleeve, and the length of the wing handle is larger than the diameter of the safety sleeve.

[0014] A locking device is provided at one end of the safety sleeve close to the baffle, and the locking device is arranged at the end of the tube body close to the wing handle. The locking device includes a block perpendicular to the baffle, and one side of the block is parallel to and fits the side surfaces of the two wing handles. The number of the wing handles is 2, and the two wing handles are symmetrical with respect to any axial section of the hollow sheath tube. The width of the wing handle is smaller than the diameter of the safety sleeve, and the length of the wing handle is larger than the diameter of the safety sleeve.

[0015] The width of the wing handle is smaller than the diameter of the safety sleeve. The stopper of the locking device can exist on the end surface of the safety sleeve in parallel with the wing handle. The wing handle is projected as a rectangle on the end surface of the safety sleeve, and occupies part of the end surface of the safety sleeve. There is a position on the end surface for setting the stopper. Preferably, the side surfaces of the two wing handle combinations are located on the same plane, and the surface where the stopper contacts the wing handle is also a plane. The two wing handles contact the plane of the stopper. The wing handle cannot rotate relative to the safety sleeve. The puncture needle in the safety sleeve cannot rotate relative to the safety sleeve because the limiting groove on the needle seat and the limiting protrusion of the triggering device on the safety sleeve are relatively fixed. Therefore, the puncture needle and the sheath cannot rotate relative to each other.

[0016] The locking device comprises a cylindrical expansion part, one end of which is coaxially connected to the tube body, and a stopper is arranged on the end surface of the expansion part away from the tube body. The expansion part enlarges the end diameter of the safety sleeve, which is more conducive to the installation of the stopper.

[0017] The advantages and positive effects of the present invention are: due to the adoption of the above technical solution, the structure of the vascular puncture sheath is stable and safer to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention

[0019] Figure 2 Schematic diagram of the combination of the puncture needle and the sheath tube of the present invention

[0020] Figure 3 This is a schematic diagram of the structure of the excitation device of the present invention in the vascular puncture sheath

[0021] Figure 4 This is a schematic diagram of the excitation device alone.

[0022] Figure 5 This is a schematic diagram of the sheath structure.

[0023] Figure 6 This is a schematic diagram of the safety sleeve structure.

[0024] Figure 7 This is a schematic diagram of the structure of the puncture needle

[0025] In the figure:

[0026] 1. Puncture needle 2. Sheath 3. Safety sleeve

[0027] 4. Excitation device 11, hollow needle tube 12, needle holder

[0028] 13. Limiting groove 21, hollow sheath tube 22, wing handle

[0029] 23, arc-shaped piece 31, baffle 32, through hole

[0030] 33. Spring 34. Expansion portion 35. Stopper

[0031] 41. Button 42. Connecting ring 43. Limiting protrusion DETAILED DESCRIPTION

[0032] like Figure 1-3 As shown, the present invention

[0033] A safety vascular puncture sheath comprises a puncture needle 1, a sheath tube 2 and a safety sleeve 3. The puncture needle 1 comprises a hollow needle tube 11 and a needle seat 12 at the tail of the needle tube. The sheath tube 2 comprises a hollow sheath tube 21 and a wing handle 22 at the tail of the sheath tube. The hollow sheath tube 21 is sleeved on the outer surface of the hollow needle tube 11. The inner wall of one end of the tube body of the safety sleeve 3 is provided with a baffle 31 perpendicular to the axis of the tube body. The baffle 31 is provided with a through hole 32 matching the outer diameter of the hollow needle tube 11. The needle seat 12 is located on a side of the baffle 31 close to the center of the safety sleeve 3. The wing handle 22 is located on a side of the baffle 31 away from the center of the safety sleeve 3. A spring 33 is provided between the needle seat 12 and the baffle 31. The safety sleeve 3 is also provided with an excitation device 4 for releasing the spring 33. The excitation device 4 matches the needle seat 12.

[0034] like Figure 4 As shown,

[0035] The excitation device 4 includes a button 41, a connecting ring 42 and a limiting protrusion 43. The outer diameter of the connecting ring 42 matches the inner diameter of the safety sleeve 3. The button 41 and the limiting protrusion 43 are symmetrical with each other about any axial section of the connecting ring 42. The button 41 is installed on the outer side of the connecting ring 42, and the limiting protrusion 43 is installed on the inner side of the connecting ring 42. The needle seat 12 is provided with a limiting groove 13 matching the limiting protrusion 43.

[0036] like Figure 5 Shown

[0037] The number of the wing handles 22 is two, and the two wing handles 22 are symmetrical to each other about any axial cross section of the hollow sheath tube 21 .

[0038] The wing handle 22 is connected to the hollow sheath tube 21 via an arc-shaped piece 23 perpendicular to the wing handle 22 . The arc-shaped piece 23 matches the outer surface of the hollow sheath tube 21 . The wing handle 22 and the arc-shaped piece 23 are integrally injection molded.

[0039] The width of the wing handle 22 is smaller than the diameter of the safety sleeve 3, and the length of the wing handle 22 is larger than the diameter of the safety sleeve.

[0040] like Figure 3 and Figure 5 Shown

[0041] A locking device is provided at one end of the safety sleeve 3 close to the baffle 31, and the locking device is arranged at the end of the tube body close to the wing handle 22. The locking device includes a block 35 perpendicular to the baffle 31, and one side of the block 35 is parallel to the side surfaces of the two wing handles 22. The number of the wing handles 22 is 2, and the two wing handles 22 are symmetrical with respect to any axial section of the hollow sheath tube 21. The width of the wing handle 22 is smaller than the diameter of the safety sleeve 3, and the length of the wing handle 22 is larger than the diameter of the safety sleeve 3.

[0042] The locking device comprises a cylindrical expansion portion 34 , one end of which is coaxially connected to the tube body, and a stopper 35 is arranged on the end surface of the expansion portion 34 away from the tube body.

[0043] The working process of this example:

[0044] During puncture, the puncture needle 1 and the sheath tube 2 are in a combined state, the spring 33 in the safety sleeve 3 is in a compressed state, the block 35 in the locking device limits the relative rotation of the wing handle 22 and the safety sleeve 3, and the limiting protrusion 43 limits the relative rotation of the puncture needle 1 and the safety sleeve 3. The sheath tube 2 and the puncture needle 1 integrated with the wing handle 22 cannot rotate relative to each other.

[0045] After the puncture is completed, the button is pressed, and the connecting ring 42 moves toward the hollow part of the safety sleeve 3 under the action of the button 41, and the limiting protrusion 43 withdraws from the limiting groove 13 on the needle seat 12. The needle seat 12 retreats into the safety sleeve 3 under the action of the spring 33, and the safety sleeve 3 is separated from the sheath tube 2, leaving only the sheath tube 2 in the patient's body.

[0046] When removing the sheath tube 2 , the two wing handles 22 at one end of the sheath tube 2 are opened, and the wing handles 22 drive the hollow sheath tube 21 to tear, thereby taking out the sheath tube 2 .

[0047] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A safe vascular puncture sheath, characterized in that: The invention comprises a puncture needle, a sheath tube and a safety sleeve, wherein the puncture needle comprises a hollow needle tube and a needle seat at the tail of the needle tube, the sheath tube comprises a hollow sheath tube and a wing handle at the tail of the sheath tube, the hollow sheath tube is sleeved on the outer surface of the hollow needle tube, the inner wall of one end of the tube body of the safety sleeve is provided with a baffle plate perpendicular to the axis of the tube body, the baffle plate is provided with a through hole matching the outer diameter of the hollow needle tube, the needle seat is located on a side of the baffle plate close to the center of the safety sleeve, the wing handle is located on a side of the baffle plate away from the center of the safety sleeve, a spring is provided between the needle seat and the baffle plate, and the safety sleeve is provided with a spring. The sleeve is also provided with an excitation device for releasing the spring, which cooperates with the needle seat. The excitation device includes a button, a connecting ring and a limiting protrusion. The outer diameter of the connecting ring cooperates with the inner diameter of the safety sleeve. The button and the limiting protrusion are symmetrical with each other about any axial section of the connecting ring. The button is installed on the outer side of the connecting ring, and the limiting protrusion is installed on the inner side of the connecting ring. The needle seat is provided with a limiting groove that cooperates with the limiting protrusion. The number of the wing handles is 2, and the 2 wing handles are symmetrical with each other about any axial section of the hollow sheath tube.

2. The safe vascular puncture sheath according to claim 1, characterized in that: The wing handle is connected to the hollow sheath tube through an arc-shaped piece perpendicular to the wing handle, the arc-shaped piece matches the outer surface of the hollow sheath tube, and the wing handle and the arc-shaped piece are integrally injection-molded.

3. The safe vascular puncture sheath according to claim 2, characterized in that: The width of the wing handle is smaller than the diameter of the safety sleeve, and the length of the wing handle is larger than the diameter of the safety sleeve.

4. The safe vascular puncture sheath according to claim 1, characterized in that: A locking device is provided at one end of the safety sleeve close to the baffle, and the locking device is arranged at the end of the tube body close to the wing handle. The locking device includes a block perpendicular to the baffle, and one side of the block is parallel to the side surfaces of the two wing handles. The width of the wing handle is smaller than the diameter of the safety sleeve, and the length of the wing handle is larger than the diameter of the safety sleeve.

5. The safe vascular puncture sheath according to claim 4, characterized in that: The locking device comprises a cylindrical expansion part, one end of which is coaxially connected to the tube body, and a stopper is arranged on the end surface of the expansion part away from the tube body.

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