Angiographic catheter suitable for arteriovenous small included angle

Abstract

The angiographic catheter comprises a catheter body, a handle and a traction wire, the catheter body comprises a first catheter section, an elbow and a second catheter section which are sequentially connected, a torsional spring hinge is arranged on the inner side of the outer wall of the elbow, a first through hole is formed in the position, close to the connecting end, of the second catheter section, the handle is arranged at the tail of the second catheter section, and the traction wire is arranged on the handle. A sliding groove is formed in the handle, a second through hole is formed in a second pipe section in the handle, the traction wire is arranged in the second pipe section, one end of the traction wire penetrates through the first through hole to be connected with the first pipe section, the other end of the traction wire penetrates through the second through hole to be connected with the sliding block, the sliding block is arranged in the sliding groove, the sliding block is connected with the air cylinder, and the air cylinder is fixed in the handle. By controlling the included angle between the first tube section and the second tube section, the catheter can adapt to a blood vessel with a very small included angle between a vein anastomosis part and an artery anastomosis part.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an angiography catheter suitable for small arteriovenous angles. Background Art

[0002] Angiographic catheters are commonly used in modern interventional radiology. Their primary purpose is to deliver the catheter to the target vessel and inject contrast agent through the catheter, thereby visualizing the target vessel under X-rays. Due to the varying internal environments and approach angles of branching vessels, existing angiographic catheters have difficulty adapting to the narrow angle between the venous and arterial anastomoses when entering an artery from a vein. Consequently, angiographic procedures take a long time for doctors and patients to be exposed to extended X-ray radiation, creating significant challenges for clinical procedures. Summary of the Invention

[0003] In view of the above problems, the present invention provides an angiography catheter suitable for small angles between arteries and veins.

[0004] To achieve the above-mentioned purpose, the present invention adopts the following technical solution: a radiographic catheter suitable for small angles between arteries and veins, comprising a tube body, a handle and a traction wire, the tube body comprising a first tube segment, an elbow and a second tube segment which are connected in sequence, a torsion spring hinge being provided on the inner side of the outer wall of the elbow, a first through hole being provided near the connection end of the second tube segment, a handle being provided at the tail of the second tube segment, a sliding groove being provided in the handle, a second through hole being provided in the second tube segment in the handle, the traction wire being provided in the second tube segment, one end of the traction wire passing through the first through hole to connect to the first tube segment, and the other end passing through the second through hole to connect to the slider, the slider being placed in the sliding groove, the slider being connected to the cylinder, and the cylinder being fixed in the handle.

[0005] Preferably, the inner side of the elbow is a plane, and the torsion spring hinge and the plane are fixed together by bolts passing through threaded holes. The torsion spring hinge includes a first page and a second page, the first page is fixedly connected to the outer wall of the first pipe section, and the second page is fixedly connected to the outer wall of the second pipe section. Several threaded holes are provided on the first page and the second page, and the outer sides of the first page and the second page are both connected to the torsion spring connecting ends.

[0006] Preferably, the length of the first pipe section is smaller than the length of the second pipe section.

[0007] Preferably, a developing ring is provided at the tail end of the first pipe section, and developing rings are provided at the connection between the elbow and the first pipe section and the second pipe section.

[0008] Preferably, a fixing ring is provided in the middle of the handle along the length direction of the handle, the length of the fixing ring is equal to the length of the handle, the tail of the second pipe section passes through the fixing ring, the inner diameter of the fixing ring is equal to the outer diameter of the second pipe section, and the fixing ring is provided with an oblique angle near the second through hole, and the second through hole is located outside the fixing ring.

[0009] Preferably, a third elongated through hole is provided at the top of the sliding groove, the length of the third through hole is equal to the length of the sliding groove, the width of the third through hole is smaller than the width of the sliding groove, and the traction wire is connected to the slider through the sliding groove.

[0010] Preferably, the diameter of the slider is equal to the inner diameter of the sliding groove, and the slider matches the inner shape and size of the sliding groove.

[0011] Preferably, a fourth through hole is provided on the side wall of the sliding groove, the piston end of the cylinder passes through the fourth through hole to connect with the slider, and the cylinder is fixed on the inner wall of the handle outside the sliding groove.

[0012] Preferably, the outer wall of the handle is provided with a normally open button and a normally closed button, one end of the normally open button is electrically connected to the positive pole of the power supply, and the other end is electrically connected to the first pin of the relay, one end of the normally closed button is electrically connected to the positive pole of the power supply, and the other end is electrically connected to the second pin of the relay, the positive pole of the power supply is electrically connected to the third pin of the relay, the positive pole of the power supply is electrically connected to the normally open button, the normally closed button and the third pin of the relay through the fuse FU1, the negative pole of the power supply is electrically connected to the fourth pin of the relay and the first pin of the solenoid valve respectively, the fifth pin of the relay is electrically connected to the third pin of the solenoid valve, the sixth pin of the relay is electrically connected to the second pin of the solenoid valve, a diode D1 is connected in parallel between the third pin of the relay and the fourth pin of the relay, and the relay, solenoid valve and power supply are all fixed in the handle.

[0013] Preferably, the relay pin 1 and the relay pin 2 are both normally open ports, the relay pin 5 and the relay pin 6 are both normally closed ports, the relay pin 3 and the relay pin 4 are both coil connection ports, the solenoid valve pin 2 and the solenoid valve pin 3 are both control ports, and the relay pin 1 is a common port.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention controls the forward and backward movement of the slider through the cylinder, traction wire and torsion spring hinge. The cylinder pushes the slider forward, driving the traction wire to move forward. The torsion spring hinge has a certain resistance, so that the traction wire is straightened, the length of the traction wire between the first tube segment and the second tube segment is increased, the angle of the torsion spring hinge is increased, and the angle between the first tube segment and the second tube segment is changed, so that the tube body can adapt to the blood vessels with extremely small angles between the venous and arterial anastomosis, reducing the doctor's operation time for angiography and reducing the patient's time to receive X-ray radiation; when the tube body has not reached the venous and arterial anastomosis, the slider is located at the end of the sliding groove, the traction wire is tightened, and the first tube segment and the second tube segment are closed, which is convenient for entering small blood vessels; the torsion spring hinge has a certain resistance, which is convenient for the traction wire to be straightened, and cooperates with the cylinder to change the position of the slider, and also plays a certain supporting role for the elbow part. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a front view of the angiography catheter of the present invention that is suitable for small angles between arteries and veins.

[0016] Figure 2 It is a main cross-sectional view of the angiography catheter suitable for small angles between arteries and veins according to the present invention.

[0017] Figure 3 This is a front view of the angiography catheter of the present invention, which is suitable for an angiography catheter with a small angle between artery and vein, entering the artery and vein with the elbow opened.

[0018] Figure 4 This is a main cross-sectional view of an angiography catheter elbow suitable for a small angle between arteries and veins according to the present invention.

[0019] Figure 5 This is an AA cross-sectional view of the angiography catheter of the present invention that is suitable for a small angle between arteries and veins.

[0020] Figure 6 This is an enlarged view of point B of the angiography catheter of the present invention that is suitable for small angles between arteries and veins.

[0021] Figure 7 This is an enlarged view of point C of the angiography catheter of the present invention that is suitable for small angles between arteries and veins.

[0022] Figure 8 This is an enlarged view of point D of the angiography catheter suitable for small angles between arteries and veins of the present invention.

[0023] Figure 9 This is a front view of the torsion spring hinge of the angiography catheter of the present invention that is suitable for use with a small arteriovenous angle.

[0024] Figure 10 This is a cylinder control circuit diagram of an angiography catheter suitable for small arteriovenous angles according to the present invention.

[0025] Description of the drawings: 1. Tube body, 11. Developing ring, 12. First through hole, 13. Second through hole, 2. Handle, 21. Normally open button, 22. Sliding groove, 23. Third through hole, 24. Fixed ring, 25. Bevel, 26. Fourth through hole, 27. Normally closed button, 3. Traction wire, 4. Cylinder, 41. Slider, 42. Solenoid valve, 43. Relay, 44. Power supply, 5. Elbow, 51. First pipe section, 52. Second pipe section, 53. Plane, 6. Torsion spring hinge, 61. First leaf, 62. Second leaf, 63. Torsion spring, 64. Threaded hole. DETAILED DESCRIPTION

[0026] In order to provide a further understanding of the purpose, structure, features, and functions of the present invention, the present invention is described in detail below with reference to the embodiments.

[0027] Please refer to Figure 1 、 Figure 4 、 Figure 6 and Figure 8 According to an embodiment of the present invention, a radiographic catheter suitable for a small angle between arteries and veins includes a tube body 1, a handle 2 and a traction wire 3. The tube body 1 includes a first tube segment 51, an elbow 5 and a second tube segment 52, which are connected in sequence. A torsion spring hinge 6 is provided on the inner side of the outer wall of the elbow 5. The second tube segment 52 is provided with a first through hole 12 near the connection end. The tail of the second tube segment 52 is provided with a handle 2. A sliding groove 22 is provided in the handle 2. The second tube segment 52 in the handle 2 is provided with a second through hole 13. The traction wire 3 is provided in the second tube segment 52. One end of the traction wire 3 passes through the first through hole 12 to connect to the first tube segment 51, and the other end passes through the second through hole 13 to connect to the slider 41. The slider 41 is placed in the sliding groove 22. The slider 41 is connected to the cylinder 4, and the cylinder 4 is fixed in the handle 2.

[0028] The cylinder 4 pushes the slider 41 forward and backward, driving the movement of the traction wire 3, and the angle of the torsion spring hinge 6 changes, driving the angle between the first tube segment 51 and the second tube segment 52, so that the tube body 1 can adapt to the blood vessels with a very small angle between the vein and artery anastomosis, reducing the doctor's operation time for angiography and reducing the time the patient is exposed to X-ray radiation.

[0029] In one embodiment, if Figure 8 and Figure 9As shown, the inner side of the elbow 5 is a plane 53, and the torsion spring hinge 6 and the plane 53 are fixed together by bolts passing through threaded holes 64. The torsion spring hinge 6 includes a first page 61 and a second page 62. The first page 61 is fixedly connected to the outer wall of the first pipe section 51, and the second page 62 is fixedly connected to the outer wall of the second pipe section 52. A plurality of threaded holes 64 are provided on the first page 61 and the second page 62. The outer sides of the first page 61 and the second page 62 are connected to the connecting ends of the torsion spring 63. The torsion spring hinge 6 is used to maintain the angle between the first pipe section 51 and the second pipe section 52. The torsion spring hinge 6 has a certain resistance to facilitate the straightening of the traction wire 3, and the plane 53 facilitates the fixing of the torsion spring hinge 6.

[0030] In one embodiment, if Figure 2 As shown, the length of the first tube segment 51 is smaller than that of the second tube segment 52, so as to prevent the first tube segment 51 from being too long to be opened at the anastomosis between the vein and the artery.

[0031] In one embodiment, if Figure 1 and Figure 3 As shown, a developing ring 11 is provided at the tail end of the first pipe section 51 , and developing rings 11 are provided at the connection between the elbow 5 and the first pipe section 51 and the second pipe section 52 to facilitate determining the position of the elbow 5 and the second pipe section 52 .

[0032] In one embodiment, if Figure 2 、 Figure 4 and Figure 6 As shown, a fixing ring 24 is provided in the middle of the handle 2 along the length direction of the handle, and the length of the fixing ring 24 is equal to the length of the handle 2. The tail of the second tube segment 52 passes through the fixing ring 24, and the inner diameter of the fixing ring 24 is equal to the outer diameter of the second tube segment 52. The fixing ring 24 is provided with an angle 25 near the second through hole 13. The second through hole 13 is located outside the fixing ring 24. The fixing ring 24 is used to fix the second tube segment 52 to facilitate the flow of contrast fluid into the second tube segment 52 at the tail of the handle 2.

[0033] In one embodiment, if Figure 4 and Figure 5 As shown, a third strip-shaped through hole 23 is provided on the top of the sliding groove 22. The length of the third through hole 23 is equal to the length of the sliding groove 22, and the width of the third through hole 23 is smaller than the width of the sliding groove 22. The traction wire 3 is connected to the slider 41 through the sliding groove 22. The third through hole 23 facilitates the movement of the traction wire 3. At the same time, the width of the third through hole 23 is smaller than the sliding groove 22 to facilitate the fixing of the slider 41 and prevent the slider 41 from being pulled away from the sliding groove 22.

[0034] In one embodiment, if Figure 5 As shown, the width of the slider 41 is equal to the inner diameter of the sliding groove 22 , the slider 41 matches the internal shape and size of the sliding groove 22 , and the cross-section of the slider 41 is rectangular, trapezoidal or circular.

[0035] In one embodiment, if Figure 2 and Figure 7 As shown, a fourth through hole 26 is provided on the side wall of the sliding groove 22, and the piston end of the cylinder 4 passes through the fourth through hole 26 to connect to the slider 41. The cylinder 4 is fixed on the inner wall of the handle 2 outside the sliding groove 22, and the fourth through hole 26 facilitates the connection of the slider 41.

[0036] In one embodiment, if Figure 1 、 Figure 4 and Figure 10 As shown, the outer wall of the handle 2 is provided with a normally open button 21 and a normally closed button 27, one end of the normally open button 21 is electrically connected to the positive pole of the power supply 44, and the other end is electrically connected to the first pin of the relay 43, one end of the normally closed button 27 is electrically connected to the positive pole of the power supply 44, and the other end is electrically connected to the second pin of the relay 43, the positive pole of the power supply 44 is electrically connected to the third pin of the relay 43, the positive pole of the power supply 44 is electrically connected to the normally open button 21, the normally closed button 27 and the third pin of the relay 43 through the fuse FU1, the negative pole of the power supply 44 is electrically connected to the fourth pin of the relay 43 and the first pin of the solenoid valve 42 respectively, the fifth pin of the relay 43 is electrically connected to the third pin of the solenoid valve 42, the sixth pin of the relay 43 is electrically connected to the second pin of the solenoid valve 42, a diode D1 is connected in parallel between the third pin of the relay 43 and the fourth pin of the relay 43, and the relay 43, the solenoid valve 42 and the power supply 44 are all fixed in the handle 2.

[0037] When the normally open button 21 is pressed to extend the cylinder 4, the solenoid valve 42 is in working state, and the air source enters the cylinder 4 in a specific direction to push the piston to extend. After releasing the normally open button 21, the solenoid valve 42 stops supplying power, and the piston of the cylinder 4 will remain in the current air circuit state. Since there is no new air source to replenish the air circuit to push the piston forward, and the air pressure in the cylinder 4 will resist the external pulling force in the current state, the piston of the cylinder 4 will not move forward due to the pulling force of the traction wire 3.

[0038] In one embodiment, the first pin of the relay 43 and the second pin of the relay 43 are both normally open ports, the fifth pin of the relay 43 and the sixth pin of the relay 43 are both normally closed ports, the third pin of the relay 43 and the fourth pin of the relay 43 are both coil connection ports, the second pin of the solenoid valve 42 and the third pin of the solenoid valve 42 are both control ports, and the first pin of the relay 43 is a common port.

[0039] Usage: Combined Figures 1 to 10As shown, when the tube body 1 has not reached the anastomosis between the vein and the artery, the slider 41 is located at the end of the sliding groove 22, the traction wire 3 is in a taut state, the first tube segment 51 and the second tube segment 52 are closed, and the tube body 1 is extended into the anastomosis between the vein and the artery. The normally open button 21 is pressed and held to drive the cylinder 4 to extend forward, pushing the slider 41 to move forward, the traction wire 3 to move forward, and the second tube segment 52 is opened. The angle is adjusted according to the actual situation so that the tube body 1 adapts to the angle between the vein and the artery anastomosis. The normally open button 21 is released to stop the movement of the cylinder 4 piston, and the normally closed button 27 is pressed and held to retract the cylinder 4 piston.

[0040] The present invention has been described with reference to the above embodiments. However, the above embodiments are merely exemplary embodiments of the present invention. It should be noted that the disclosed embodiments do not limit the scope of the present invention. On the contrary, modifications and improvements that do not depart from the spirit and scope of the present invention are intended to be protected by the present invention.

Claims

1. An angiographic catheter suitable for small arteriovenous angles, characterized by: The invention comprises a tube body (1), a handle (2) and a traction wire (3), wherein the tube body (1) comprises a first tube section (51), an elbow (5) and a second tube section (52) which are connected in sequence, a torsion spring hinge (6) is provided on the inner side of the outer wall of the elbow (5), a first through hole (12) is provided near the connection end of the second tube section (52), a handle (2) is provided at the tail end of the second tube section (52), a sliding groove (22) is provided in the handle (2), a second through hole (13) is provided in the second tube section (52) in the handle (2), the traction wire (3) is provided in the second tube section (52), one end of the traction wire (3) passes through the first through hole (12) to connect to the first tube section (51), and the other end passes through the second through hole (13) to connect to the slider (41), the slider (41) is placed in the sliding groove (22), the slider (41) is connected to the cylinder (4), and the cylinder (4) is fixed in the handle (2).

2. The angiographic catheter suitable for small arteriovenous angles according to claim 1, characterized in that: The inner side of the elbow (5) is a plane (53), and the torsion spring hinge (6) and the plane (53) are fixed together by bolts passing through threaded holes (64). The torsion spring hinge (6) includes a first leaf (61) and a second leaf (62). The first leaf (61) is fixedly connected to the outer wall of the first pipe section (51), and the second leaf (62) is fixedly connected to the outer wall of the second pipe section (52). The first leaf (61) and the second leaf (62) are provided with a plurality of threaded holes (64). The outer sides of the first leaf (61) and the second leaf (62) are both connected to the connecting ends of the torsion spring (63).

3. The angiographic catheter suitable for small arteriovenous angles according to claim 1, characterized in that: The length of the first pipe section (51) is shorter than the length of the second pipe section (52).

4. The angiographic catheter suitable for small arteriovenous angles according to claim 1, characterized in that: A developing ring (11) is provided at the tail end of the first pipe section (51), and developing rings (11) are provided at the connection points between the elbow (5), the first pipe section (51), and the second pipe section (52).

5. The angiographic catheter suitable for small arteriovenous angles according to claim 1, characterized in that: A fixing ring (24) is provided in the middle of the handle (2) along the length direction of the handle, the length of the fixing ring (24) is equal to the length of the handle (2), the tail of the second pipe section (52) passes through the fixing ring (24), the inner diameter of the fixing ring (24) is equal to the outer diameter of the second pipe section (52), the fixing ring (24) is provided with an oblique angle (25) near the second through hole (13), and the second through hole (13) is located outside the fixing ring (24).

6. The angiographic catheter suitable for small arteriovenous angles according to claim 1, characterized in that: A third long through hole (23) is provided at the top of the sliding groove (22). The length of the third through hole (23) is equal to the length of the sliding groove (22), and the width of the third through hole (23) is smaller than the width of the sliding groove (22). The traction wire (3) is connected to the slider (41) through the sliding groove (22).

7. The angiographic catheter suitable for small arteriovenous angles according to claim 1, characterized in that: The diameter of the slider (41) is equal to the inner diameter of the sliding groove (22), and the slider (41) matches the inner shape and size of the sliding groove (22).

8. The angiographic catheter suitable for small arteriovenous angles according to claim 1, characterized in that: A fourth through hole (26) is provided on the side wall of the sliding groove (22), and the piston end of the cylinder (4) passes through the fourth through hole (26) to connect to the slider (41). The cylinder (4) is fixed on the inner wall of the handle (2) outside the sliding groove (22).

9. The angiographic catheter suitable for small arteriovenous angles according to claim 1, characterized in that: The outer wall of the handle (2) is provided with a normally open button (21) and a normally closed button (27), one end of the normally open button (21) is electrically connected to the positive pole of the power supply (44), and the other end is electrically connected to the first pin of the relay (43), one end of the normally closed button (27) is electrically connected to the positive pole of the power supply (44), and the other end is electrically connected to the second pin of the relay (43), the positive pole of the power supply (44) is electrically connected to the third pin of the relay (43), and the positive pole of the power supply (44) is electrically connected to the normally open button (21) and the normally closed button (27) through the fuse FU1. ) and the third pin of the relay (43), the negative pole of the power supply (44) is electrically connected to the fourth pin of the relay (43) and the first pin of the solenoid valve (42), the fifth pin of the relay (43) is electrically connected to the third pin of the solenoid valve (42), the sixth pin of the relay (43) is electrically connected to the second pin of the solenoid valve (42), a diode D1 is connected in parallel between the third pin of the relay (43) and the fourth pin of the relay (43), and the relay (43), the solenoid valve (42) and the power supply (44) are all fixed in the handle (2).

10. The angiography catheter suitable for small arteriovenous angles according to claim 9, characterized in that: The first pin of the relay (43) and the second pin of the relay (43) are both normally open ports, the fifth pin of the relay (43) and the sixth pin of the relay (43) are both normally closed ports, the third pin of the relay (43) and the fourth pin of the relay (43) are both coil connection ports, the second pin of the solenoid valve (42) and the third pin of the solenoid valve (42) are both control ports, and the first pin of the relay (43) is a common port.

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