Intravascular foreign body snare device

Abstract

The present invention discloses an intravascular foreign body snare device, and the technical solution thereof mainly comprises: a clamp having a "bow"-shaped structure, wherein two ends of the bottom of the clamp are connected with a drawstring via a winding assembly, a top groove is provided on the top of the clamp, and a fixing assembly for fixing a catheter is provided in the top groove; the technical effect thereof is: the intravascular foreign body snare device adjusts the angle of the catheter by rotating a telescopic rod, and then a guide wire is placed inside the catheter, at which time the positions of two clamps are limited and then the catheter is limited, so that shaking of the guide wire during operation is avoided, discomfort to the patient is avoided, and damage to the patient's blood vessels is avoided, and the drawstring is adjusted by rotating a roller to fit tightly against the patient's arm, so that unstable adhesion of the clamp due to sweating of the patient's arm is avoided, and the tightness of the drawstring can be adjusted, so that the patient is more comfortable wearing the clamp.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to an intravascular foreign body snare device. Background Art

[0002] An intravascular foreign body snare device is a medical device used in the process of removing foreign bodies from blood vessels. It usually consists of a soft guide wire, a snare or clip, and an operating handle.

[0003] When foreign objects occur in blood vessels, they may cause complications such as blood flow obstruction, thrombosis, and vascular damage. Medical staff insert a guide wire to reach the location of the foreign object, then use the guide wire to guide the loop or clip around the foreign object, and contract the loop or clip to clamp the foreign object and finally remove it.

[0004] In the prior art, before inserting the guide wire, the catheter needs to be inserted into the lesion site first, and the skin around the catheter needs to be covered with a transparent patch or a transparent film patch to keep the position of the catheter stable. However, when the catheter is fixed with a patch, if the medical staff operates with a slightly larger amplitude when inserting the guide wire, it may cause the catheter to shake, causing discomfort to the patient. In addition, it may increase the friction and pressure between the catheter and the fragile inner wall of the blood vessel, thereby increasing the risk of vascular damage. In addition, the patient's sweating may cause the patch to fail to fit tightly to the skin, leading to the risk of the catheter loosening. Summary of the invention

[0005] The purpose of the present invention is to provide an intravascular foreign body snare device, which has the advantages of avoiding the unstable adhesion of the clamp due to sweating of the patient's arm, and the tightness of the strap can be adjusted to make the patient wear the clamp more comfortable.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions: an intravascular foreign body snare device, comprising a holder in a "bow"-shaped structure, a band is connected between the two ends of the bottom of the holder through a winding assembly, a top groove is provided on the top of the holder, and a fixing assembly for fixing a catheter is provided in the top groove;

[0007] The fixing assembly includes a bottom plate arranged on the bottom side of the top groove, a collar composed of two clamps being slidably connected to the bottom plate, telescopic rods being connected to the two sides of the two clamps away from each other, the two clamps being connected by a locking mechanism, and fixing rings being connected to the two sides of the clamps by a plurality of connecting rods, and the catheter passes through the fixing ring and the clamps in sequence.

[0008] The present invention is further configured as follows: a slide groove is provided on the top side of the bottom plate along the length direction, and a sliding block that slides in the slide groove is hingedly connected to the bottom sides of the two clamps.

[0009] The present invention is further configured as follows: the locking mechanism includes an inner groove opened 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, limiting grooves are respectively opened on the top and bottom sides of the left side plate, the outer side of the clamp is connected to a limiting arc plate through a cross bar, and the two inner top sides of the limiting arc plate are respectively symmetrically connected with convex rods.

[0010] The present invention is further configured as follows: 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.

[0011] The present invention is further configured as follows: 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 wrapped around the rotating rod, a roller is sleeved on the outer side of the rotating rod near the end, and the horizontal bar hole is connected to the roller through a limiting mechanism.

[0012] The present invention is further configured as follows: the limiting mechanism comprises a vertical rod fixedly connected to the top side of the horizontal bar hole, a winding rod is rotatably connected in the vertical rod, two pull ropes are symmetrically wound around the winding rod, a vertical groove with a "convex" cross-section is opened in the vertical rod along the height direction, two connecting blocks respectively connected to the two pull ropes are slidably connected in the vertical groove along the horizontal axis direction, a buffer spring is connected between the two connecting blocks, a connecting ring is arranged on the front side of the roller, a ring groove is opened in the circumferential direction of the connecting ring, and side grooves are opened on both inner sides of the ring groove along the circumferential direction;

[0013] When the vertical rod contacts the bottom wall of the annular groove, the buffer spring squeezes the connecting block to be clamped into the side groove.

[0014] The present invention is further configured such that a sponge pad is detachably connected to the inner side of the clamp.

[0015] To summarize, the intravascular foreign body snare device adjusts the angle of the catheter by rotating the telescopic rod, and then places the guide wire inside the catheter. At this time, the positions of the two clamps are limited and then the catheter is limited to avoid shaking of the guide wire during operation, to avoid discomfort to the patient, and to avoid damage to the patient's blood vessels. The roller is rotated to adjust the strap to fit tightly against the patient's arm to avoid unstable adhesion of the clamp due to sweating on the patient's arm, and the tightness of the strap can be adjusted to make the patient more comfortable wearing the clamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention;

[0017] Figure 2 For the present invention Figure 1 The enlarged structural diagram at A in the middle;

[0018] Figure 3 This is a schematic diagram of the cross-sectional structure of the clamp of the present invention;

[0019] Figure 4 For the present invention Figure 3 The enlarged structural diagram at B in the middle;

[0020] Figure 5 It is a schematic diagram of the partial cross-sectional structure of the top of the clamp of the present invention;

[0021] Figure 6 It is a schematic diagram of the cross-sectional structure of the clamp of the present invention from the side;

[0022] Figure 7 This is a schematic diagram of the installation structure of the rotating rod of the present invention;

[0023] Figure 8 It is a schematic diagram of the cross-sectional structure of the rotating rod of the present invention;

[0024] Fig. 9 For the present invention Figure 8 Enlarged structural diagram at point C in the middle.

[0025] 1. The cam is provided with a plurality of connecting rods, a plurality of connecting rods and a plurality of connecting rods, wherein the plurality of connecting rods have the plurality of connecting rods and a plurality of connecting rods. The plurality of connecting rods have the plurality of connecting rods and a plurality of connecting rods. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0027] Example: A foreign body snare device in a blood vessel, see Figure 1-4A foreign body snare device for an intravascular vessel comprises a clamp 10, a sponge pad 11 is fixedly connected to the front and rear sides of the bottom of the clamp 10, a top groove 12 is provided on the top of the clamp 10, a telescopic rod 13 is rotatably connected to the inner walls on the left and right sides of the top groove 12, a clamp 14 is fixedly connected to one end of the telescopic rod 13 away from the inner wall of the top groove 12, a fixing ring 15 is fixedly installed at both the front and rear ends of the clamp 14, there are two telescopic rods 13 and clamps 14 and they are symmetrically arranged, the two clamps 14 are adapted to abut against each other, and the two clamps 14 are adapted to abut against each other. The position of the fixed ring 15 can be limited and controlled. A catheter 16 is inserted into the interior of the fixed ring 15. A sliding block 17 is rotatably connected to the bottom of the clamp 14. A bottom plate 18 is fixedly installed on the bottom wall of the top groove 12. A sliding groove 19 is provided at the top of the bottom plate 18. A circular groove is provided inside the catheter 16, and a guide wire can be placed inside the catheter 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.

[0028] See also Figure 5-6 The top of the clamp 14 is provided with an inner groove 20, and the right side of the inner groove 20 is slidably connected with a right side plate 21, and the right side of the right side plate 21 is adapted to abut against the right end of the clamp 14, and the left side of the inner groove 20 is slidably connected with a left side plate 22, and a connecting spring 23 is fixedly connected between the right side plate 21 and the left side plate 22. A limiting groove 24 is provided on the surface of the left side of the left side plate 22, and a cross bar 25 is fixedly installed on the left side of the clamp 14, and a limiting arc plate 26 is slidably connected to the left side of the cross bar 25, and convex rods 27 are fixedly installed on the upper and lower sides of the inner wall of the limiting arc plate 26. The shape 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. The convex rod 27 is adapted to be clamped with the limiting groove 24, and the convex rod 27 can be clamped inside the limiting groove 24 to limit the position of the left side plate 22.

[0029] See also Figure 7-9The bottom of the left side of the clamp 10 is rotatably connected with a rotating rod 30, the surface of the rotating rod 30 is wrapped with a strap 31, a roller 32 is fixedly installed on the surface of the rear end of the rotating rod 30, and a connecting ring 33 is fixedly installed on the front end of the roller 32. The right side of the strap 31 is fixedly connected to the bottom of the right side of the clamp 10, and the connecting ring 33 is fixedly connected to the surface of the rotating rod 30. A side groove 34 is opened on the surface of the connecting ring 33. A vertical rod 35 is fixedly installed at the bottom of the clamp 10, and a winding rod 36 is slidably connected to the front and rear sides of the vertical rod 35. The vertical rod 35 The front and rear sides of the interior are symmetrically and slidably connected with connecting blocks 37, 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 is provided with a slot that is adapted to be snapped with the front end of the winding rod 36, the connecting block 37 and the side groove 34 are adapted to be snapped, and one end of the pull rope 39 away from the connecting block 37 is fixedly mounted 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 groove 34, and at this time the connecting ring 33 can be controlled to rotate to reel in the strap 31.

[0030] Operation steps: When in use, the operator places the clamp 10 on the patient's arm so that the sponge pad 11 is tightly attached to the top of the patient's arm, and then the winding rod 36 can be rotated to wind the drawstring 39, so that the drawstring 39 pulls the two connecting blocks 37 to compress the buffer spring 38 and move them closer to each other until the connecting blocks 37 are separated from the inside of the side groove 34. At this time, the positions of the connecting ring 33 and the roller 32 are no longer limited. At this time, the roller 32 can be rotated to drive the rotating rod 30 to rotate, so that the rotating rod 30 winds the strap 31, and as the strap 31 is continuously tightened, the strap 31 is tightly attached to the bottom of the patient's arm. The operator then 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. At this time, 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, so that 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 is inserted into the inner groove 20 opened in the two clamps 14, so that the end of the right side plate 21 away from the connecting spring 23 is close to the side wall of the clamp 14, and then the operator continues to pull the left side plate 22 to stretch the connecting spring 23. While keeping pulling the connecting spring 23, the operator rotates the limiting arc plate 26, so that the limiting arc plate 26 drives the convex rod 27 to rotate until the end of the convex rod 27 away from the limiting arc plate 26 is clamped in the limiting groove 24. At this time, the operator loosens 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 convex rod 27 are The rod 27 and the cross bar 25 limit the left clamp 14, and then limit the positions of the two clamps 14, so that the clamp 14 can stably limit the position of the fixing ring 15, avoiding the fixing ring 15 from shaking and causing discomfort to the patient. When the catheter 16 needs to be removed, the operator rotates the right plate 21 to drive the left plate 22 to rotate, so that the limiting groove 24 disengages from the protruding rod 27. At this time, the left plate 22 is no longer limited. Then the operator pulls out the right plate 21, the connecting spring 23 and the left plate 22 to facilitate the subsequent separation of the two clamps 14. At this time, the operator can remove the catheter 16.

[0031] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A foreign body snare device in a blood vessel, characterized in that: The invention comprises a holder (10) in a "bow"-shaped structure, wherein a strap (31) is connected between two ends of the bottom of the holder (10) via a winding assembly, and a top groove (12) is provided at the top of the holder (10), wherein a fixing assembly for fixing a catheter (16) is provided in the top groove (12); The fixing assembly comprises a bottom plate (18) arranged on the inner bottom side of the top groove (12), a collar consisting of two clamps (14) being slidably connected to the bottom plate (18), the two clamps (14) being connected to telescopic rods (13) on the sides away from each other, the two clamps (14) being connected by a locking mechanism, the two sides of the clamps (14) being connected to fixing rings (15) by a plurality of connecting rods, and the conduit (16) passing through the fixing rings (15) and the clamps (14) in sequence; The locking mechanism comprises an inner groove (20) formed at the top of the two clamps (14), a left side plate (22) and a right side plate (21) being slidably connected in the inner groove (20), a connecting spring (23) being connected between the left side plate (22) and the right side plate (21), a limiting groove (24) being formed at the top and bottom sides of the left side plate (22), the outer side of the clamp (14) being connected to a limiting arc plate (26) via a cross bar (25), and two inner top sides of the limiting arc plate (26) being symmetrically connected to protruding rods (27); The winding assembly comprises a horizontal bar hole formed 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 the end, and the horizontal bar hole is connected to the roller (32) via a limiting mechanism; The limiting mechanism comprises a vertical rod (35) fixedly connected to the top side of the horizontal bar hole, a winding rod (36) rotatably connected inside the vertical rod (35), two pull ropes (39) symmetrically wound around the winding rod (36), a vertical groove with a "convex" cross-section structure is provided inside the vertical rod (35) along the height direction, two connecting blocks (37) respectively connected to the two pull ropes (39) are slidably connected to 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 provided on the connecting ring (33) along the circumferential direction, and side grooves (34) are provided on both inner sides of the ring groove along the circumferential direction; When the vertical rod (35) contacts the bottom wall of the annular groove, the buffer spring (38) presses the connecting block (37) to snap into the side groove (34).

2. The intravascular foreign body snare device according to claim 1, characterized in that: A sliding groove (19) is provided on the top side of the bottom plate (18) along the length direction, and a sliding block (17) that slides in the sliding groove (19) is hingedly connected to the bottom sides of the two clamps (14).

3. The intravascular foreign body snare device according to claim 1, 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 snare 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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