Device for locating ureteral lesions

Abstract

The present invention discloses a device for locating the position of ureteral lesions, comprising a sheath tube and a puncture positioning device that can move along the inside of the sheath tube, wherein a long strip through hole is arranged along the length direction of the sheath tube at a position near the end on one side of the front end of the sheath tube, the long strip through hole penetrates the inner wall and the outer wall of the sheath tube, an annular guide groove is arranged on the inner wall of the sheath tube near the end of the long strip through hole away from the front end of the sheath tube, one point of the annular guide groove is connected to the long strip through hole, the puncture positioning device comprises a push rod, an elastic rod, a puncture needle and an adjusting sleeve coaxially sleeved on the outside of the push rod, the elastic rod is bent at a 180 degree angle when not in use, the front end of the puncture needle is bent into the adjusting sleeve when not in use, a protrusion corresponding to the annular guide groove is arranged on the end of the puncture needle near the elastic rod, the lesion site is determined by pushing the puncture needle in and ensuring that the puncture needle pops out along the long strip through hole, and the positioning accuracy of the operation can be improved.

Description

Technical Field

[0001] The invention relates to the field of medical instruments, and in particular to a device for locating the position of ureteral lesions. Background Art

[0002] Ureteral stenosis or tumors are currently treated with laparoscopic ureteral stenosis or tumor resection and end-to-end anastomosis. However, how to accurately determine the location of ureteral stenosis or tumor in the ureter outside the ureter under laparoscopy is an unsolvable problem. Avoiding excessive resection of normal ureters is an important factor in ensuring the effectiveness of anastomosis surgery. Therefore, it is necessary to keep as many normal ureters as possible when resecting stenosis or tumors under laparoscopy. Therefore, it is very important to accurately locate the boundary between ureteral stenosis, tumor starting end and normal ureter under laparoscopy. Clinically, some people insert a light source in the ureter through a ureteroscope to observe the location of stenosis or tumor in the abdominal cavity, but often cannot accurately determine the location of stenosis or tumor. Therefore, more normal ureters are often resected or slope tumors are cut, which affects the effect of surgery and anastomosis. It may be necessary to change the surgical procedure and choose a more traumatic surgical method, increasing the risk of surgical complications. Summary of the invention

[0003] In view of the above problems, the present invention provides a device for locating the position of ureteral lesions, which has the advantages of simple structure and can accurately locate the position of ureteral lesions.

[0004] The technical solution of the present invention is:

[0005] A device for locating the position of a ureteral lesion comprises a sheath and a puncture positioning device that can move along the inside of the sheath, wherein a long strip through hole is provided along its length direction at a position near the end on one side of the front end of the sheath, the long strip through hole penetrates the inner wall and the outer wall of the sheath, an annular guide groove is provided on the inner wall of the sheath near the end of the long strip through hole away from the front end of the sheath, one point of the annular guide groove is connected to the long strip through hole, the puncture positioning device comprises a push rod, an elastic rod, a puncture needle and an adjustment sleeve coaxially sleeved on the outside of the push rod, the elastic rod has a bending angle of 180 degrees when not in use, the front end of the puncture needle is bent into the adjustment sleeve when not in use, and a protrusion corresponding to the annular guide groove is provided on the end of the puncture needle near the elastic rod.

[0006] The elastic rod is a spring.

[0007] The push rod is made of titanium-nickel alloy.

[0008] The puncture needle is provided with a diamond-shaped cutting edge in an annular manner along the axial direction thereof.

[0009] The beneficial effects of the present invention are:

[0010] 1. A bendable puncture positioning device is built into the sheath, and a long strip through hole is set at the front end of the sheath. The front end of the sheath is used to support the lesion position of the ureteral stenosis. By inserting the puncture positioning device, the puncture needle pops out along the long strip through hole under the action of the elastic rod to cut the ureter. The puncture needle position is found externally using a laparoscope to determine the ureteral lesion position, which is convenient for subsequent surgical operations. A protrusion is set at the end of the puncture needle, and a circular guide groove corresponding to the protrusion is set at one end of the long strip through hole of the sheath. When the puncture needle is inserted into the sheath in a bent state, the position of the puncture needle can be guided to ensure that the puncture needle can pop out along the long strip through hole, which can improve the reliability and accuracy of use.

[0011] 2. The elastic rod is a spring, which can ensure the reliability of the puncture needle ejection under the action of elastic force;

[0012] 3. The push rod is made of titanium-nickel alloy, which can ensure the reliability of pushing the puncture needle along the sheath;

[0013] 4. The diamond-shaped blade is arranged in a ring on the puncture needle, which can ensure that the puncture needle can puncture the ureter and improve the reliability of positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of a device for locating a ureteral lesion according to an embodiment of the present invention;

[0015] Figure 2 It is a schematic diagram of the use status of a device for locating a ureteral lesion according to an embodiment of the present invention.

[0016] Description of reference numerals:

[0017] 1 is a sheath tube, 2 is a puncture positioning device, 11 is a long strip through hole, 12 is an annular guide groove, 21 is a push rod, 22 is an elastic rod, 23 is a puncture needle, 24 is an adjustment sleeve, and 231 is a protrusion. DETAILED DESCRIPTION

[0018] The embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0019] Example:

[0020] like Figure 1-Figure 2As shown, a device for locating the position of a ureteral lesion comprises a sheath tube 1 and a puncture positioning device 2 which can move along the inside of the sheath tube 1. A long strip through hole 11 is arranged along its length direction at a position near the end on one side of the front end of the sheath tube 1. The long strip through hole 11 penetrates the inner wall and the outer wall of the sheath tube 1. An annular guide groove 12 is arranged on the inner wall of the sheath tube 1 near the end of the long strip through hole 11 away from the front end of the sheath tube 1. One point of the annular guide groove 12 is connected to the long strip through hole 11. The puncture positioning device 2 comprises a push rod 21, an elastic rod 22, a puncture needle 23 and an adjusting sleeve 24 coaxially sleeved on the outside of the push rod 21 which are connected in sequence. The elastic rod 22 is bent at an angle of 180 degrees when not in use. The front end of the puncture needle 23 is bent into the adjusting sleeve 24 when not in use. A protrusion 231 corresponding to the annular guide groove 12 is arranged on the end of the puncture needle 23 near the elastic rod 22.

[0021] The working principle of the above technical solution is as follows:

[0022] The diameter of the ureter at the location where the lesion occurs is smaller than the diameter of the ureter in a normal state. When it is necessary to position it, the sheath 1 is first pushed along the ureter and the front end of the sheath 1 is pressed against the lesion position. When the push rod 21, the elastic rod 22 and the puncture needle 23 of the puncture positioning device 2 are not in use, the elastic rod 22 is bent 180 degrees and drives the puncture needle 23 to be parallel to the push rod 21 up and down. At the same time, the puncture needle 23 is fixed using the adjusting sleeve 24 to prevent the puncture needle 23 from rebounding. The adjusting sleeve 24, the puncture needle 23, the elastic rod 22 and the push rod 21 are pushed into the sheath 1 through the push rod 21. Since the front end of the puncture needle 23 is provided with a protrusion 231 and the front end of the sheath 1 is provided with an annular guide groove 12, during the pushing process, the protrusion 231 is automatically stuck. The annular guide groove 12 is inserted into the annular guide groove 12, which indicates that the puncture needle 23 is initially in place. At the same time, the adjusting sleeve 24 and the push rod 21 are rotated and kept pushed forward as a whole. Since the annular guide groove 12 is connected to the long strip through hole 11 at one point, after the protrusion 231 is rotated to this point, the protrusion 231 can slide along the long strip through hole 11 and drive the puncture needle 23 to move forward. At this time, the adjusting sleeve 24 is pulled away from the push rod 21 to release the lock on the puncture needle 23. During the pushing process, the puncture needle 23 pops out along the long strip through hole 11 and cuts the ureter and penetrates the inner and outer walls of the ureter. The surgical operator can determine the location of the lesion by finding the puncture needle through the external laparoscopic searchlight, which can improve the reliability and accuracy of surgical positioning.

[0023] The elastic rod 22 is a spring, which can ensure the reliability of the puncture needle ejecting under the action of elastic force.

[0024] The length of the puncture needle 23 is 5 mm, which can be applied to all lesion sites with different wall thicknesses.

[0025] The push rod 21 is made of titanium-nickel alloy, which can ensure the reliability of pushing the puncture needle along the sheath tube.

[0026] The puncture needle 23 is provided with a diamond-shaped blade in a circular shape along its axial direction, which can ensure that the puncture needle can puncture the ureter and improve the reliability of positioning.

[0027] The above-mentioned embodiments only express the specific implementation of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A device for locating a ureteral lesion, characterized in that: The invention comprises a sheath tube (1) and a puncture positioning device (2) which can move along the inside of the sheath tube (1); a long strip through hole (11) is arranged at a position close to the end of the front end of the sheath tube (1) along the length direction thereof; the long strip through hole (11) penetrates the inner wall and the outer wall of the sheath tube (1); an annular guide groove (12) is arranged at one end of the inner wall of the sheath tube (1) close to the long strip through hole (11) and away from the front end of the sheath tube (1); one point of the annular guide groove (12) is aligned with the long strip through hole (11). The puncture positioning device (2) comprises a push rod (21), an elastic rod (22), a puncture needle (23) and an adjustment sleeve (24) coaxially sleeved on the outside of the push rod (21) which are connected in sequence, the elastic rod (22) has a bending angle of 180 degrees when not in use, the front end of the puncture needle (23) is bent into the adjustment sleeve (24) when not in use, and a protrusion (231) corresponding to the annular guide groove (12) is provided at one end of the puncture needle (23) close to the elastic rod (22); The elastic rod (22) is a spring; The puncture needle (23) is provided with a diamond-shaped cutting edge in an annular shape along its axial direction.

2. A device for locating ureteral lesions according to claim 1, characterized in that: The push rod (21) is made of titanium-nickel alloy.

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