Disposable ureter guiding sheath

Abstract

The utility model discloses a disposable ureter guiding sheath, and belongs to the field of medical instruments. The guide sheath comprises a guide sheath body, a traction wire is wound on the outer surface of a connecting shaft, one end of the traction wire is arranged on the outer wall of the connecting shaft, a traction groove is formed in the lower end in the body of the sheath tube, and the other end of the traction wire is installed at the bottom end in the traction groove. When the sheathing canal is inserted, the sheathing canal is in contact with the inner wall of the urethra to be bent, the formed triangular groove and the formed right-angle groove are completely extruded by the sheathing canal, the serrated wheel is shifted by fingers to rotate, and one end of the sheathing canal is pulled by the shortened traction wire to move towards the central position of the negative pressure joint; the angle of the sheathing canal can be conveniently adjusted during an operation, a T-shaped insertion rod is pressed downwards, a clamping rod is inserted into a tooth groove of a serrated wheel, the position of the serrated wheel is fixed through the clamping rod, the insertion end of the sheathing canal is prevented from moving when a leading doctor operates, and the bending degree of the sheathing canal can be manually changed.

Description

Technical Field

[0001] The utility model belongs to the field of medical devices, and in particular relates to a disposable ureteral guide sheath. Background Art

[0002] A ureteral introducer sheath is a medical device used to assist with guidance and positioning during interventional urological procedures or examinations. It is typically made of soft material and has a certain degree of flexibility to adapt to the human anatomy. It consists of a dilator, sheath, and lumen guidewire.

[0003] The existing Chinese patent with publication number CN220530083U discloses a ureteral guide sheath. The ureteral guide sheath includes a guide sheath body and a guide sheath connector. The guide sheath body has a first end and a second end. The second end is connected to the guide sheath connector. The guide sheath connector is provided with a negative pressure connector. The negative pressure connector is connected to the guide sheath body. The opening of the first end is an oblique opening. One end of the guide sheath body adopts an oblique opening design. When reaching the lesion location, the oblique opening design of the guide sheath body increases the surface area in contact with the stone, making it more able to contact with the stone. In the process of negative pressure stone removal, the stone fragments can be drawn into the ureteral guide sheath more quickly, and then discharged from the body, solving the problem of low efficiency of stone removal by the ureteral guide sheath in the prior art.

[0004] Regarding the above-mentioned related technologies, the dilation tube is inserted into the patient's urethra, and the ureteral guide sheath is passively bent along with the soft endoscope and cannot be actively bent and stretched. As a result, the surgeon needs to repeatedly adjust its angle during the operation, which delays the operation and affects the patient's health.

[0005] Therefore, we propose a disposable ureteral guide sheath to solve the above problems. Utility Model Content

[0006] In view of the above problems existing in the prior art, the purpose of the present invention is to provide a disposable ureteral guide sheath.

[0007] In order to solve the above problems, the technical solution adopted by the present invention is as follows: a disposable ureteral guide sheath comprises a guide sheath body, wherein the guide sheath body comprises a negative pressure joint and a sheath tube installed in the middle of the bottom end of the negative pressure joint;

[0008] A rotating groove is provided on the outside of the negative pressure joint, and a saw gear is movably installed inside the rotating groove. A connecting shaft is movably installed in the middle of one end of the saw gear and inside the body of the negative pressure joint. A traction wire is wrapped around the outer surface of the connecting shaft, and one end of the traction wire is on the outer wall of the connecting shaft. A traction groove is provided at the lower end of the inner part of the sheath tube, and the other end of the traction wire is installed at the inner bottom end of the traction groove.

[0009] Preferably, a rotating shaft A is movably installed inside the body of the negative pressure joint, and the rotating shaft A is arranged below the connecting shaft, and a rotating shaft B is movably installed inside the body of the negative pressure joint.

[0010] Preferably, a T-shaped slot is provided at the top of the negative pressure joint, a T-shaped rod is inserted into the T-shaped slot, a positioning rod is installed at the bottom end of the T-shaped rod, and an inverted U-shaped frame is installed at the top end of the T-shaped rod.

[0011] Preferably, positioning grooves are provided on both sides of the middle end of the T-shaped slot and inside the body of the negative pressure joint, and rubber rods are installed on both sides of the lower end of the T-shaped insertion rod, and the rubber rods are inserted into the interior of the positioning grooves.

[0012] Preferably, a triangular groove is provided on the outer side of the sheath tube, and the triangular groove and the distraction groove are located on the same side of the sheath tube.

[0013] Preferably, a right-angle groove is opened on the inner wall of the sheath tube, a protective film is installed inside the right-angle groove, and the outer side of the protective film is aligned with the inner wall of the sheath tube.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] (1) The disposable ureteral guide sheath of the utility model is bent when the sheath contacts the inner wall of the urethra during insertion. The triangular groove and the right-angle groove are squeezed by the sheath. The saw gear is rotated by the fingers. When the connecting shaft rotates, the traction wire is wound. The shortened traction wire is used to pull one end of the sheath toward the center of the negative pressure connector, so that the angle of the sheath can be adjusted during surgery.

[0016] (2) The disposable ureteral guide sheath of the present invention presses down the T-shaped insertion rod, the positioning rod is inserted into the tooth groove of the saw gear, and the rubber rod is inserted into the interior of the positioning groove to fix the position of the T-shaped insertion rod. The positioning rod is used to fix the position of the saw gear to prevent the insertion end of the sheath from moving during the operation of the leading doctor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the guide sheath body of the present invention;

[0019] Figure 3 For the utility model Figure 2 Enlarged view of point A in the middle;

[0020] Figure 4 For the utility model Figure 2 Enlarged view of point B in the middle.

[0021] In the figure: 1. Guide sheath body; 11. Negative pressure connector; 111. Rotating groove; 112. Saw gear; 113. Connecting shaft; 114. Rotating shaft A; 115. Rotating shaft B; 116. T-shaped slot; 117. T-shaped insertion rod; 1171. Positioning rod; 1172. Inverted U-shaped frame; 118. Positioning groove; 119. Rubber rod; 12. Sheath tube; 121. Pulling groove; 122. Triangular groove; 123. Right-angle groove; 124. Protective film; 125. Pull wire. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Example 1: Please refer to Figure 1 、 Figure 2 and Figure 4 The disposable ureteral guide sheath comprises a guide sheath body 1 , which comprises a negative pressure connector 11 and a sheath tube 12 installed in the middle of the bottom end of the negative pressure connector 11 .

[0024] A rotating groove 111 is provided on the outside of the negative pressure connector 11, and a saw gear 112 is movably installed inside the rotating groove 111. A connecting shaft 113 is movably installed in the middle of one end of the saw gear 112 and inside the body of the negative pressure connector 11. A traction wire 125 is wrapped around the outer surface of the connecting shaft 113, and one end of the traction wire 125 is on the outer wall of the connecting shaft 113. A traction groove 121 is provided at the lower end of the inner body of the sheath tube 12, and the other end of the traction wire 125 is installed at the inner bottom end of the traction groove 121. By manually turning the saw gear 112 to rotate, the connecting shaft 113 is prompted to reel in the traction wire 125, thereby achieving angle adjustment of the insertion end of the sheath tube 12.

[0025] A triangular groove 122 is provided on the outside of the sheath tube 12 , and the triangular groove 122 and the traction groove 121 are located on the same side of the sheath tube 12 , so that when the saw gear 112 is rotated to reel in the traction wire 125 , the sheath tube 12 can be pulled to move in a direction parallel to the negative pressure connector 11 .

[0026] A right-angle groove 123 is provided on the inner wall of the sheath tube 12, and a protective film 124 is installed inside the right-angle groove 123. The outer side of the protective film 124 is aligned with the inner wall of the sheath tube 12. The position of the right-angle groove 123 is opposite to the direction of the position of the traction groove 121. The protective film 124 is provided to prevent the catheter from getting stuck inside the right-angle groove 123 when inserted into the guide sheath.

[0027] In this embodiment: when the sheath 12 is inserted, the sheath 12 contacts the inner wall of the urethra and bends, and the triangular groove 122 and the right-angle groove 123 are completely squeezed by the sheath 12. When adjusting the insertion end of the sheath 12, the saw gear 112 is rotated by the fingers, and the traction wire 125 is wound when the connecting shaft 113 rotates. The traction wire 125 moves along the rotation axis B115 and the rotation axis A114, and the moving traction wire 125 is restricted and protected. The shortened traction wire 125 is used to pull one end of the sheath 12 to move toward the center position of the negative pressure connector 11, so as to facilitate the adjustment of the angle of the sheath 12 during surgery. When inserting the catheter, the protective film 124 will prevent one end of the catheter from being stuck inside the right-angle groove 123.

[0028] Example 2: Please refer to Figure 2 and Figure 3 A rotating shaft A114 is movably installed inside the body of the negative pressure joint 11, and the rotating shaft A114 is arranged below the connecting shaft 113. A rotating shaft B115 is movably installed inside the body of the negative pressure joint 11, and the rotating shaft B115 and the rotating shaft A114 are at the same height. The rotating shaft B115 is above the pulling groove 121. The rotating connecting shaft 113, the rotating shaft A114 and the rotating shaft B115 are used to protect the moving traction wire 125.

[0029] A T-shaped slot 116 is provided at the top of the negative pressure connector 11, a T-shaped rod 117 is inserted inside the T-shaped slot 116, a locking rod 1171 is installed at the bottom end of the T-shaped rod 117, and an inverted U-shaped frame 1172 is installed at the top of the T-shaped rod 117. The locking rod 1171 is inserted into the tooth groove of the saw gear 112 to fix the position of the saw gear 112, thereby fixing the bending degree of the sheath tube 12.

[0030] Positioning grooves 118 are provided on both sides of the middle end of the T-shaped slot 116 and inside the body of the negative pressure connector 11. Rubber rods 119 are installed on both sides of the lower end of the T-shaped insertion rod 117. The rubber rods 119 are inserted into the positioning grooves 118 to fix the position of the T-shaped insertion rod 117.

[0031] In this embodiment: during surgical operation, after the angle of the sheath 12 is adjusted, the T-shaped rod 117 is pressed down, the positioning rod 1171 is inserted into the tooth groove of the saw gear 112, and the rubber rod 119 is inserted into the interior of the positioning groove 118 to fix the position of the T-shaped rod 117. The positioning rod 1171 is used to fix the position of the saw gear 112 to prevent the insertion end of the sheath 12 from moving during the operation by the leading doctor.

[0032] Working principle: When the sheath 12 is inserted, the sheath 12 contacts the inner wall of the urethra and bends, and the triangular groove 122 and the right-angle groove 123 are completely squeezed by the sheath 12. The fingers move the saw gear 112 to rotate, and the traction wire 125 is reeled in when the connecting shaft 113 rotates. The shortened traction wire 125 is used to pull one end of the sheath 12 toward the center position of the negative pressure connector 11, so as to facilitate the adjustment of the angle of the sheath 12 during surgery. The T-shaped insertion rod 117 is pressed down, and the positioning rod 1171 is inserted into the tooth groove of the saw gear 112. The rubber rod 119 is inserted into the inside of the positioning groove 118 to fix the position of the T-shaped insertion rod 117. The positioning rod 1171 is used to fix the position of the saw gear 112 to prevent the insertion end of the sheath 12 from moving during operation by the leading doctor.

[0033] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0034] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A disposable ureteral guide sheath, comprising a guide sheath body (1), characterized in that: The guide sheath body (1) comprises a negative pressure joint (11) and a sheath tube (12) installed in the middle of the bottom end of the negative pressure joint (11); A rotation groove (111) is provided on the outside of the negative pressure joint (11), a saw gear (112) is movably installed inside the rotation groove (111), a connecting shaft (113) is movably installed in the middle of one end of the saw gear (112) and inside the body of the negative pressure joint (11), a traction wire (125) is wound around the outer surface of the connecting shaft (113), and one end of the traction wire (125) is on the outer wall of the connecting shaft (113), a traction groove (121) is provided at the lower end of the inner part of the body of the sheath tube (12), and the other end of the traction wire (125) is installed at the inner bottom end of the traction groove (121).

2. The disposable ureteral guide sheath according to claim 1, characterized in that: A rotating shaft A (114) is movably mounted inside the body of the negative pressure joint (11), and the rotating shaft A (114) is arranged below the connecting shaft (113). A rotating shaft B (115) is movably mounted inside the body of the negative pressure joint (11).

3. The disposable ureteral guide sheath according to claim 2, characterized in that: The top end of the negative pressure joint (11) is provided with a T-shaped slot (116), a T-shaped rod (117) is inserted into the interior of the T-shaped slot (116), a positioning rod (1171) is installed at the bottom end of the T-shaped rod (117), and an inverted U-shaped frame (1172) is installed at the top end of the T-shaped rod (117).

4. The disposable ureteral guide sheath according to claim 3, characterized in that: Positioning grooves (118) are provided on both sides of the middle end of the T-shaped slot (116) and inside the body of the negative pressure joint (11). Rubber rods (119) are installed on both sides of the lower end of the T-shaped insertion rod (117), and the rubber rods (119) are inserted into the interior of the positioning grooves (118).

5. The disposable ureteral guide sheath according to claim 1, characterized in that: A triangular groove (122) is provided on the outer side of the sheath tube (12), and the triangular groove (122) and the traction groove (121) are located on the same side of the sheath tube (12).

6. The disposable ureteral guide sheath according to claim 5, characterized in that: The inner wall of the sheath tube (12) is provided with a right-angle groove (123), a protective film (124) is installed inside the right-angle groove (123), and the outer side of the protective film (124) is aligned with the inner wall of the sheath tube (12).

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