Endovascular foreign body snare device

Abstract

Disclosed in the present invention is an endovascular foreign body snare device. The key points of the technical solution are as follows: the endovascular foreign body snare device comprises a clamping device having a bow-shaped structure, a strapping band being connected between two ends of the bottom of the clamping device by means of a winding assembly, a top groove being provided at the top of the clamping device, and a fixing assembly for fixing a catheter being provided in the top groove. The endovascular foreign body snare device has the following technical effects: in the endovascular foreign body snare device, the angle of the catheter is adjusted by rotating a telescopic rod, then a guide wire is placed inside the catheter, and at this time, the positions of two clamps are limited so as to limit the catheter to prevent the guide wire from shaking during operation, thereby avoiding patient discomfort and vascular injuries. A roller is rotated to adjust the strapping band to be tightly attached to an arm of the patient, thereby preventing unstable adhesion of the clamping device caused by sweating of the arm of the patient. In addition, the tightness of the strapping band can be adjusted to ensure greater comfort for the patient when wearing the clamping device.

Description

A foreign body loop device for intravascular use Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a foreign body loop device for intravascular vessels. Background Technology

[0002] An intravascular foreign body loop device is a medical device used to remove foreign bodies from blood vessels. It typically consists of a flexible guidewire, a loop or clamp, and an operating handle.

[0003] When a foreign body occurs in a blood vessel, it may cause complications such as obstructed blood flow, thrombosis, and vascular damage. Medical staff can reach the location of the foreign body by inserting a guide wire, then guide a loop or clamp around the foreign body through the guide wire, and then tighten the loop or clamp to clamp the foreign body and finally remove it.

[0004] In existing technologies, before inserting the guidewire, the catheter needs to be inserted into the lesion site. The skin around the catheter is covered with a transparent dressing or transparent film to keep the catheter stable. However, when using a dressing to fix the catheter, if the medical staff operates too vigorously when inserting the guidewire, the catheter may shake, causing discomfort to the patient. In addition, it will increase the friction and pressure between the catheter and the fragile inner wall of the blood vessel, thereby increasing the risk of vascular damage. Furthermore, the dressing may not fit tightly against the skin due to the patient sweating, which may lead to the risk of the catheter loosening. Summary of the Invention

[0005] The purpose of this invention is to provide an intravascular foreign body loop device, which has the advantages of avoiding unstable adhesion of the clamp due to sweating on the patient's arm, and the adjustable tightness of the band makes the patient more comfortable wearing the clamp.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution: an intravascular foreign body loop device, comprising a clamp with an "arch"-shaped structure, wherein a strap is connected between the two bottom ends of the clamp via a winding assembly, and a top groove is provided on the top of the clamp, wherein a fixing assembly for fixing a catheter is provided in the top groove; the fixing assembly includes a base plate disposed on the bottom side of the top groove, wherein a loop composed of two clamps is slidably connected to the base plate, wherein a telescopic rod is respectively connected to the opposite side of the two clamps, the two clamps are connected by a locking mechanism, and a fixing ring is connected to both sides of the clamps via several connecting rods, wherein the catheter passes through the fixing ring and the clamp in sequence.

[0007] The invention is further configured such that: a sliding groove is provided on the top side of the base plate along the length direction, and a sliding block that slides in the sliding groove is hinged to the bottom sides of the two clamps.

[0008] The invention is further configured such that: the locking mechanism includes an inner groove formed on the top of the two clamps, a left side plate and a right side plate are slidably connected in the inner groove, a connecting spring is connected between the left side plate and the right side plate, a limiting groove is formed on the top and bottom sides of the left side plate, a limiting arc plate is connected to the outer side of the clamps through a crossbar, and protruding rods are symmetrically connected to the two inner top sides of the limiting arc plate.

[0009] The present invention is further configured such that: the cross-section of the inner wall of the limiting groove is elliptical, and the depth of the limiting groove gradually increases from the left and right sides to the upper and lower sides.

[0010] The present invention is further configured such that: the winding assembly includes a horizontal bar hole opened on the bottom side of the clamp, a rotating rod is rotatably connected between the two inner walls of the horizontal bar hole, the strap is wound around the rotating rod, a roller is sleeved on the outer side of the rotating rod near its end, and the horizontal bar hole is connected to the roller through a limiting mechanism.

[0011] The invention is further configured such that: the limiting mechanism includes a vertical rod fixedly connected to the top side of the horizontal bar hole; a winding rod is rotatably connected inside the vertical rod; two pull ropes are symmetrically wound on the winding rod; a vertical groove with a convex cross-section is formed inside the vertical rod along the height direction; two connecting blocks, each connected to one of the two pull ropes, are slidably connected inside the vertical groove along the horizontal axis; a buffer spring is connected between the two connecting blocks; a connecting ring is provided on the front side of the roller; a ring groove is formed around the circumference of the connecting ring; and side grooves are formed on both inner sides of the ring groove along the circumference. When the vertical rod abuts against the bottom wall of the ring groove, the buffer spring compresses the connecting block and engages it in the side groove.

[0012] The invention is further configured such that a sponge pad is detachably connected to the inner side of the clamp.

[0013] In summary, this intravascular foreign body clamping device adjusts the angle of the catheter by rotating the telescopic rod, and then places the guidewire inside the catheter. At this time, the positions of the two clamps are restricted, thereby restricting the catheter and preventing the guidewire from shaking during operation, avoiding patient discomfort, and preventing damage to the patient's blood vessels. Rotating the roller adjusts the strap to fit snugly against the patient's arm, preventing the clamp from becoming unstable due to sweating on the patient's arm, and the tightness of the strap can be adjusted, making the clamp more comfortable for the patient. Attached Figure Description

[0014] Figure 1 is a schematic diagram of the structure of the present invention; Figure 2 is an enlarged schematic diagram of section A in Figure 1 of the present invention; Figure 3 is a cross-sectional schematic diagram of the clamp of the present invention; Figure 4 is an enlarged schematic diagram of section B in Figure 3 of the present invention; Figure 5 is a partial cross-sectional schematic diagram of the top of the clamp of the present invention; Figure 6 is a side cross-sectional schematic diagram of the clamp of the present invention; Figure 7 is a schematic diagram of the installation structure of the rotating rod of the present invention; Figure 8 is a cross-sectional schematic diagram of the rotating rod of the present invention; Figure 9 is an enlarged schematic diagram of section C in Figure 8 of the present invention.

[0015] Reference numerals: 10. Clamp; 11. Sponge pad; 12. Top groove; 13. Telescopic rod; 14. Clamp; 15. Fixing ring; 16. Guide tube; 17. Sliding block; 18. Base plate; 19. Slide groove; 20. Inner groove; 21. Right side plate; 22. Left side plate; 23. Connecting spring; 24. Limiting groove; 25. Crossbar; 26. Limiting arc plate; 27. Protruding rod; 30. Rotating rod; 31. Strap; 32. Roller; 33. Connecting ring; 34. Side groove; 35. Vertical rod; 36. Winding rod; 37. Connecting block; 38. Buffer spring; 39. Pull rope. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to the accompanying drawings.

[0017] Example: An intravascular foreign body loop device, as shown in Figures 1-4, includes a gripper 10. Sponge pads 11 are fixedly connected to the front and rear sides of the bottom of the gripper 10. A top groove 12 is formed at the top of the gripper 10. Telescopic rods 13 are rotatably connected to the inner walls of the left and right sides of the top groove 12. A clamp 14 is fixedly connected to the end of the telescopic rod 13 away from the inner wall of the top groove 12. Fixing rings 15 are fixedly installed at both the front and rear ends of the clamp 14. There are two telescopic rods 13 and two clamps 14 arranged symmetrically. The two clamps 14 are compatible and can limit and control the position of the fixing ring 15. The fixing ring 15 has a guide tube 16 inserted inside. The bottom of the clamp 14 is rotatably connected to a sliding block 17. The bottom wall of the top groove 12 is fixedly installed with a base plate 18. The top of the base plate 18 has a sliding groove 19. The inside of the guide tube 16 has a circular groove, which can place the guide wire inside the guide tube 16. The sliding block 17 is located inside the sliding groove 19. The bottom of the sliding block 17 can swing inside the sliding groove 19, and the sliding block 17 can slide inside the sliding groove 19.

[0018] Please refer to Figures 5-6. The top of the clamp 14 has an inner groove 20. A right side plate 21 is slidably connected to the right side of the inner groove 20. The right side of the right side plate 21 is adapted to and abuts against the right end of the clamp 14. A left side plate 22 is slidably connected to the left side of the inner groove 20. A connecting spring 23 is fixedly connected between the right side plate 21 and the left side plate 22. A limiting groove 24 is opened on the left side surface of the left side plate 22. A crossbar 25 is fixedly installed on the left side of the clamp 14. A limiting arc plate 26 is slidably connected to the left side of the crossbar 25. Protruding rods 27 are fixedly installed on both the upper and lower sides of the inner wall of the limiting arc plate 26. The inner wall of the limiting groove 24 is elliptical in shape. The depth of the limiting groove 24 gradually increases from the left and right sides to the upper and lower sides. The protruding rods 27 are adapted to and engaged with the limiting groove 24. The protruding rods 27 can be engaged inside the limiting groove 24 to limit the position of the left side plate 22.

[0019] Please refer to Figure 7-9. A rotating rod 30 is rotatably connected to the bottom left side of the gripper 10. A strap 31 is wound around the surface of the rotating rod 30. A roller 32 is fixedly installed on the rear end surface of the rotating rod 30. A connecting ring 33 is fixedly installed at the front end of the roller 32. The right side of the strap 31 is fixedly connected to the bottom right side of the gripper 10. The connecting ring 33 is fixedly connected to the surface of the rotating rod 30. A side groove 34 is formed on the surface of the connecting ring 33. A vertical rod 35 is fixedly installed at the bottom of the gripper 10. A winding rod 36 is slidably connected to the front and rear sides inside the vertical rod 35. Connecting blocks 37 are symmetrically slidably connected to the front and rear sides inside the rod 35. A buffer spring 38 is fixedly connected between the two connecting blocks 37. A pull rope 39 is fixedly connected between the two connecting blocks 37. The front end of the vertical rod 35 has a slot that is adapted to engage with the front end of the winding rod 36. The connecting block 37 and the side slot 34 are adapted to engage. The end of the pull rope 39 away from the connecting block 37 is fixedly installed on the surface of the middle part of the winding rod 36. The winding rod 36 can be rotated to pull the connecting block 37 to disengage it from the side slot 34. At this time, the connecting ring 33 can be controlled to rotate to wind up the strap 31.

[0020] Operating Procedures: During use, the operator places the clamp 10 on the patient's arm, ensuring the sponge pad 11 is firmly against the top of the patient's arm. Then, the winding rod 36 is rotated to wind the pull rope 39, causing the pull rope 39 to pull the two connecting blocks 37, compressing the buffer spring 38 and bringing them closer together until the connecting blocks 37 disengage from the side groove 34. At this point, the positions of the connecting ring 33 and the roller 32 are no longer restricted. The roller 32 can then be rotated to drive the rotating rod 30, causing the rotating rod 30 to wind the strap 31. As the strap 31 is continuously tightened, it becomes firmly against the bottom of the patient's arm. Afterwards, the operator rotates the winding rod 36 in the opposite direction, so that the pull rope 39 no longer pulls the connecting block 37. Then, the two connecting blocks 37 move away from each other under the action of the rebound force of the buffer spring 38. At this time, the connecting block 37 abuts against the inside of the side groove 34, and the connecting ring 33 is fixed by the connecting block 37, so that the connecting ring 33 is fixed to the bottom of the clamp 10. Therefore, the clamp 10 is stably fixed to the patient's arm. Then, the operator can rotate the telescopic rod 13 to drive the clamp 14 to rotate, thereby fixing the catheter 16. At this time, the operator moves the right side plate 21, the connecting spring 23 and the left side plate 22. The combination of the two clamps 14 is inserted into the inner groove 20, so that the end of the right side plate 21 away from the connecting spring 23 is tightly against the side wall of the clamp 14. Then, the operator continues to pull the left side plate 22 to stretch the connecting spring 23. While keeping the connecting spring 23 pulled, the operator rotates the limiting arc plate 26, so that the limiting arc plate 26 drives the protruding rod 27 to rotate until the end of the protruding rod 27 away from the limiting arc plate 26 is engaged in the inner groove 24. At this time, the operator releases the left side plate 22. At this time, the end face of the right side plate 21 limits the right clamp 14, and the left side plate 22 and the protruding rod 27 rotate. Rod 27 and crossbar 25 limit the left clamp 14, thereby limiting the position of the two clamps 14, so that the clamps 14 stably limit the position of the fixing ring 15, preventing the fixing ring 15 from shaking and causing discomfort to the patient. When it is necessary to remove the catheter 16, the operator rotates the right plate 21 to drive the left plate 22 to rotate, so that the limiting groove 24 disengages from the protrusion 27. At this time, the left plate 22 is no longer limited. Then the operator pulls out the right plate 21, connecting spring 23 and left plate 22 to facilitate the subsequent separation of the two clamps 14. At this time, the operator can remove the catheter 16.

[0021] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A foreign body loop device for intravascular vessels, characterized in that: Includes a clamp (10) with an "arch" shaped structure, with a strap (31) connected between the two bottom ends of the clamp (10) by a winding assembly, and a top groove (12) provided on the top of the clamp (10), with a fixing assembly for fixing the conduit (16) provided in the top groove (12). The fixing assembly includes a base plate (18) set on the bottom side of the top groove (12), a collar consisting of two clamps (14) is slidably connected on the base plate (18), a telescopic rod (13) is connected to the opposite side of the two clamps (14), the two clamps (14) are connected by a locking mechanism, and a fixing ring (15) is connected to both sides of the clamps (14) by several connecting rods, and a guide tube (16) passes through the fixing ring (15) and the clamps (14) in sequence; The locking mechanism includes an inner groove (20) opened on the top of two clamps (14), a left side plate (22) and a right side plate (21) are slidably connected in the inner groove (20), a connecting spring (23) is connected between the left side plate (22) and the right side plate (21), a limiting groove (24) is opened on the top and bottom sides of the left side plate (22), a limiting arc plate (26) is connected to the outside of the clamp (14) through a crossbar (25), and a protruding rod (27) is symmetrically connected to the two inner top sides of the limiting arc plate (26); The winding assembly includes a horizontal bar hole on the bottom side of the clamp (10), a rotating rod (30) is rotatably connected between the two inner walls of the horizontal bar hole, the strap (31) is wound around the rotating rod (30), a roller (32) is sleeved on the outer side of the rotating rod (30) near its end, and the horizontal bar hole is connected to the roller (32) through a limiting mechanism; The limiting mechanism includes a vertical rod (35) fixedly connected to the top side of the horizontal bar hole. A winding rod (36) is rotatably connected inside the vertical rod (35). Two pull ropes (39) are symmetrically wound on the winding rod (36). A vertical groove with a "convex" cross-section is opened in the vertical rod (35) along the height direction. Two connecting blocks (37) connected to the two pull ropes (39) are slidably connected in the vertical groove along the horizontal axis direction. A buffer spring (38) is connected between the two connecting blocks (37). A connecting ring (33) is provided on the front side of the roller (32). A ring groove is opened in the circumferential direction of the connecting ring (33). Side grooves (34) are opened in the two inner sides of the ring groove along the circumferential direction. When the vertical rod (35) comes into contact with the bottom wall of the annular groove, the buffer spring (38) squeezes the connecting block (37) into the side groove (34).

2. The intravascular foreign body looping device according to claim 1, characterized in that: The top side of the base plate (18) is provided with a groove (19) along the length direction, and the bottom sides of the two clamps (14) are hinged together with a sliding block (17) that slides in the groove (19).

3. The intravascular foreign body looping device according to claim 3, characterized in that: The cross-section of the inner wall of the limiting groove (24) is elliptical, and the depth of the limiting groove (24) gradually increases from the left and right sides to the upper and lower sides.

4. The intravascular foreign body looping device according to claim 1, characterized in that: A sponge pad (11) is detachably connected to the inner side of the clamp (10).

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