CN215653292U - Percutaneous puncture biliary tract drainage tube with adjustable locking system - Google Patents

Abstract

The utility model relates to a percutaneous puncture biliary tract drainage tube with an adjustable locking system, and belongs to the technical field of medical instruments. The utility model consists of a drainage tube body, a tube seat and an adjustable locking system; the front end of the adjustable locking system is fixedly connected and communicated with the tail end of the drainage tube body through a tube seat; the adjustable locking system is composed of a locking line, a pressing plate, a torsion spring, a locking system base, a conical sealing plug, a first rotating shaft, a second rotating shaft and a supporting rod, and a drainage inner cavity with openings at two ends is formed in the locking system base. The utility model has the advantages that: the locking line can be adjusted repeatedly through the pressing plate, and the locking line can be adjusted by pressing down the pressing plate, so that the locking is realized by loosening, the problem that the locking is difficult to adjust after locking is solved, and the difficulty of operation is reduced; the conical sealing plug can realize the complete sealing of a human body and the outside, and effectively avoid secondary infection caused by air leakage and liquid leakage. The bracing piece can effectively fix the clamp plate, strengthens the locking effect, prevents that locking line becomes flexible the complication such as displacement, slippage that arouses.

Description

Percutaneous puncture biliary tract drainage tube with adjustable locking system

Technical Field

The utility model relates to a percutaneous puncture biliary tract drainage tube with an adjustable locking system, and belongs to the technical field of medical instruments.

Background

A percutaneous puncture biliary tract drainage tube is a medical appliance which is placed into the biliary tract, the gall bladder and the like through percutaneous transhepatic puncture under the guidance of imaging equipment (ultrasound, CT, DSA and the like) through puncture to carry out bile drainage or cavity perfusion and flushing. The surface of the medical drainage tube is smooth and soft, the biocompatibility is good, and the medical drainage tube has the characteristics of a plurality of drainage side holes and the like, so the medical drainage tube is widely applied clinically.

The percutaneous puncture biliary tract drainage tube is composed of tube seat, drainage tube body and locking system. The tip of the drainage and drainage tube body is generally curled into a pigtail shape and used for fixing an inner cavity and preventing the catheter from moving and slipping; the drainage tube body is soft and smooth, has good X-ray developing effect, has a large inner cavity, and can fully drain due to a plurality of side holes on the tube wall. The locking system is provided with a locking line and is used for fixing the pigtail in a curling way and preventing the pigtail from deforming in the body.

The traditional locking system is easy to break the locking wire during operation, and the locking wire is not easy to open and close repeatedly after being locked, so that the operation difficulty of medical staff is increased; the locking wire is easy to loosen, and the tip pig tail deforms, so that complications such as catheter displacement, slippage and the like are caused; the locking line outlet of the locking system is often accompanied by air leakage and liquid leakage, so that external bacteria are easy to invade, and secondary infection is caused.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: the percutaneous puncture biliary tract drainage tube solves the problems that the locking wire of the existing product is easy to break and difficult to operate repeatedly, the locking wire is not flexible, and the locking system leaks gas and leaks liquid, and provides an adjustable locking system.

In order to achieve the purpose, the utility model adopts the following design scheme:

a percutaneous puncture biliary tract drainage tube with an adjustable locking system comprises a drainage tube body, a tube seat and the adjustable locking system; the front end of the adjustable locking system is fixedly connected and communicated with the tail end of the drainage tube body through a tube seat;

the adjustable locking system is composed of a locking line, a pressing plate, a torsion spring, a locking system base, a conical sealing plug, a first rotating shaft, a second rotating shaft and a supporting rod, and a drainage inner cavity with openings at two ends is formed in the locking system base.

The locking system base is a bearing body of other components of the locking system, and the pressure plate and the torsion spring are arranged on the top plane of the locking system base and connected by a first rotating shaft; the supporting rod is connected with the pressing plate by a second rotating shaft; the conical sealing plug is arranged in a conical hole formed in the locking system base.

The locking system base is internally provided with a drainage inner cavity with openings at two ends, the front part is a liquid inlet end, the rear part is a liquid outlet end, and the middle part is a holding connecting part; the liquid inlet end adopts 55-degree British fine thread which has good looseness prevention and sealing performance and is used for being tightly connected with the pipe seat, so that the phenomena of loosening of the fixed end of a locking wire assembled in the pipe seat and leakage of a system can be prevented; the liquid outlet end is in the shape of a locking luer inner conical joint and can be connected with a three-way valve and a drainage bag (the three-way valve and the drainage bag are necessary instruments for operation and are irrelevant to the utility model).

A bottom plane is arranged above the holding connecting part, a left side wall and a right side wall are respectively arranged on two sides of the bottom plane, a front supporting part is arranged at the front part of the bottom plane, and the left side wall, the right side wall and the front supporting part are integrally connected; a first locking system base shaft hole is formed in the middle of the left side wall, and a second locking system base shaft hole is formed in the middle of the right side wall; a locking system base limiting groove is arranged on the top plane close to the rear part, is L-shaped, and is used for limiting the position of a lower torsion bar of the torsion spring, one end of the locking system base limiting groove is connected with the left side wall, and the other end of the locking system base limiting groove faces the direction of the front supporting part; a locking system base limiting hole is formed in the bottom plane and close to the liquid outlet end, when the pressing plate needs to be locked, the supporting rod on the pressing plate is rotated, and the head end of the supporting rod is placed into the locking system base limiting hole.

The pressing plate is provided with a pressing plate pressing part and a pressing plate pressing part which are integrally formed, the pressing plate pressing part is arranged at the front end of the pressing plate pressing part, and the included angle between the pressing plate pressing part and the pressing plate pressing part is less than or equal to 90 degrees; the middle parts of two sides below the pressing part of the pressing plate are provided with a left leg and a right leg of the pressing plate which are integrally connected, the lower end of the left leg of the pressing plate is provided with a first pressing plate shaft hole, the lower part of the right leg of the pressing plate is provided with a second pressing plate shaft hole, and the first pressing plate shaft hole and the second pressing plate shaft hole are used for connecting the pressing plate and the locking system base; the middle of the upper side of the pressing part of the pressing plate is provided with a pressing plate groove for placing the supporting rod, and the middle of the inner side of the groove is provided with two bulges which can clamp the supporting rod; a third press plate shaft hole and a fourth press plate shaft hole are formed in the two sides of the press plate groove at the rear end of the press part of the press plate and used for connecting the supporting rod; the rear part of the lower side surface of the pressing part of the pressing plate is provided with a pressing plate limiting groove for limiting the position of an upper torsion bar of the torsion spring; the rear part of the pressure plate limiting groove is provided with a blocking surface which can prevent the supporting rod from excessively rotating to the lower part of the pressure plate; the bottom of the pressing plate pressing portion is of a wedge-shaped structure, the structure is tightly matched with a wedge-shaped groove of a locking system base, sliding friction between the locking line and the locking system base is increased, and the locking line is difficult to pull after being locked; the front side of the pressing part of the pressing plate is a pressing surface, and an included angle between the pressing surface and the pressing part of the pressing plate is an acute angle.

The front supporting part is provided with a taper hole towards the liquid inlet end, the tip end of the front supporting part is communicated with the drainage inner cavity through an inner cavity line hole of the locking system base, and a tapered sealing plug which is completely matched with the taper hole in shape is placed in the taper hole; an included angle between the inclined plane of the locking system base of the front supporting part facing the top plane and the top plane is an obtuse angle; the front end of the top plane is provided with a wedge-shaped groove which is matched with the wedge-shaped structure below the pressing plate pressing portion and can be matched with the pressing plate wedge-shaped structure to press the locking line.

The supporting rod is provided with a straight rod, the head end of the supporting rod is hemispherical, the tail end of the supporting rod is provided with a supporting rod shaft hole, the shaft hole is arranged between the third pressing plate shaft hole and the fourth pressing plate shaft hole, the rotating shafts of the third pressing plate shaft hole and the fourth pressing plate shaft hole are connected through a second rotating shaft, and the supporting rod can rotate axially.

The conical sealing plug is made of high polymer materials and has high elasticity, friction coefficient and deformation resistance; the locking wire is placed in a taper hole of a locking system base, a wire hole of an inner cavity of the locking system base is plugged, and the locking wire is pressed. In the prior art, the locking line has smooth surface and higher toughness, the twitching process is not easy to control and easy to retract, so that the pig tail rebounds, the risk is increased for the operation, and the operation time is prolonged.

According to the utility model, the taper hole and the taper sealing plug matched with the taper hole are innovatively designed, the locking line is placed between the taper hole and the taper sealing plug, the taper sealing plug cannot move, and when the locking line is pulled outwards by loosening the pressing plate, the part of the taper sealing plug, which is in contact with the locking line, can be slightly deformed, so that the locking line is smoothly pulled out; when the pumping is stopped, the conical sealing plug continuously presses the locking wire under the action of the resilience force, so that the locking wire is prevented from being withdrawn; the conical sealing plug increases the sliding friction when the locking wire is drawn, and can better control the pig tail to form a loop. When the locking device is locked, the conical sealing plug is sealed in the conical hole and expands in the conical hole due to the extrusion of the pressing surface of the pressing plate, so that the hole of the inner cavity is not communicated with the external environment, and the phenomena of air leakage, liquid leakage and the like are effectively prevented.

The first rotating shaft sequentially penetrates through a first locking system base shaft hole, a first pressure plate shaft hole, a torsion spring, a second pressure plate shaft hole and a second locking system base shaft hole to fix the pressure plate above the locking system base; the torsion spring is fixed between the pressing plate and the locking system base; the pressing surface of the pressing plate can be completely attached to the inclined surface of the locking system base; the second rotating shaft penetrates through the third pressing plate shaft hole, the supporting rod shaft hole and the fourth pressing plate shaft hole, the supporting rod is fixed at the tail end of the pressing plate, and the angle between the supporting rod and the pressing plate after the supporting rod enters the limiting hole of the locking system base is 65-100 degrees, preferably 90 degrees. The length of the supporting rod and the angle of the supporting rod and the pressing plate determine the pressure provided by the supporting rod to the pressing plate; the other point is that the rotating support rod, the pressure plate and the locking system base can be in a stable triangular structure, so that the whole locking system is more stable in action; the length of the supporting rod, the position of the base limiting hole and the supporting angle of the supporting rod and the pressing plate are finally determined by combining the two points and the structure. Meanwhile, the maximum rotatable angle of the supporting rod is limited to about 270 degrees by design, the purpose is to limit the movement of the supporting rod, the supporting rod can enter a limiting hole of a base of the locking system in a directional mode, and the stability of the structure is enhanced.

The torsion spring is positioned between the locking system base and the pressing plate, the upper torsion bar of the torsion spring is arranged in the pressing plate limiting groove, and the lower torsion bar of the torsion spring is arranged in the locking system base limiting groove. The torsional spring material is stainless steel, and the line footpath is 0.6mm, and coil external diameter 3mm, coil internal diameter 2.4mm, torsion bar length 4mm, effective number of turns 4. The angle of the two torsion bars of the torsion spring is approximately equal to 90 degrees in a normal state, the angle of the two torsion bars of the torsion spring is approximately equal to 45 degrees after the torsion spring is assembled in the locking system, and the elastic force generated by the torsion spring enables the pressing plate to be tightly pressed on the base of the locking system.

The tip of the drainage tube body is pre-shaped and curled into a pigtail shape, and the pigtail shape is retained in a biliary tract or a gallbladder to play a role in fixation; the 6 drainage side holes are uniformly distributed on the curled inner side of the pigtail, the size of the drainage side holes is 2.5mm multiplied by 0.5mm, the hole-to-hole distance is 8mm, the drainage effect is ensured by the 6 drainage side holes and the large aperture, and the tube body is prevented from deforming when being curled or extruded at proper intervals; the drainage side holes are distributed at the curled inner side of the tip end of the tube body and are not in direct contact with the biliary tract or the cystic wall, so that the risk of tube body blockage is greatly reduced; two tube body line holes are formed in the tip end of the drainage tube body, and the distance between the first tube body line hole and the tip end of the catheter is 9 mm; the distance between the second tube body wire hole and the tip end of the catheter is 80 mm; along with the twitching of the locking thread, the distance between the two tube body thread holes is the perimeter of the pigtail loop, the diameter of the pigtail is about 22mm, and the pigtail can be stably fixed in most biliary tracts (the diameter of a normal common bile duct is about 6mm-8mm, the biliary tracts are obviously expanded after being blocked, the diameter of the blocked part can exceed 10mm, even 20mm, and the size of the utility model is suitable for most blocked situations); the surface of the drainage tube body is marked with scale marks, so that doctors can conveniently judge the puncture depth in the operation and the nursing after the operation (postoperative medical personnel can preliminarily judge whether the drainage tube deviates from the scales, and the scales are in the prior art); the pigtail end has the development ring, and the development ring develops under the X-ray, makes things convenient for the doctor to track drainage tube tip position, and whole drainage tube body all can clearly develop under the X-ray.

The pipe seat is internally provided with a 55-degree British fine thread which has good looseness prevention and sealing performance and is tightly connected with the locking system base, so that the phenomena of looseness of the fixed end of a locking wire assembled in the pipe seat and leakage of a system can be prevented; the outside is provided with anti-skid lines, which is beneficial to production and assembly; the tube seat is used for connecting the drainage tube body and the adjustable locking system and fixing the fixed end of the locking line.

The locking line is a medical suture (such as 3-0 medical suture, a market product), and has smooth surface, good toughness, wear resistance and good biocompatibility; the fixed end of the locking wire penetrates into the first tube body wire hole from the outside of the drainage tube body, the free end of the locking wire penetrates into the second tube body wire hole from the outside of the outer body of the drainage tube body, enters the inner cavity of the drainage tube body, and the two ends of the locking wire are led out from the tail end of the drainage tube body and penetrate through the tube seat; the fixed end of the locking wire is screwed and fixed with the pipe seat through 55-degree British fine thread of the locking system base 1 and is kept at the pipe seat; and the free end of the locking wire sequentially passes through the drainage inner cavity of the locking system base and the inner cavity wire hole of the locking system base and is led out from the taper hole.

The application method of the present disclosure is as follows:

1. the hand holds the locking system base, the pressing plate is pressed by the thumb, the pressing plate wedge-shaped structure slides out of the wedge-shaped groove of the locking system base, and the locking line is loosened;

2. at the moment, the locking wire is pulled outwards until the tip of the drainage tube is curled into a pigtail shape; the thumb loosens the pressing plate, under the resilience action of the torsion spring, the pressing surface of the pressing plate can automatically return to the original position and is tightly attached to the inclined surface of the locking system base, and meanwhile, the conical sealing plug is extruded, so that the wire hole of the inner cavity of the locking system base is completely sealed;

3. the supporting rod clamped in the groove of the pressing plate is rotatably arranged, and the head end of the supporting rod is clamped in a limiting hole of a base of the locking system, so that locking is enhanced.

4. When the drainage tube needs to be adjusted in the operation process, the pressing plate is only slightly lifted, the supporting rod is taken out of the limiting hole and clamped into the pressing plate groove above the pressing plate, then the pressing plate is pressed again, the locking line can be continuously adjusted at the moment, and the locking is performed again according to the step 3 after the adjustment is finished.

The utility model has the following advantages: 1. the adjustable locking system can repeatedly adjust the locking line through the pressing plate, the locking line can be adjusted by pressing the pressing plate, and the locking is realized by loosening the pressing plate, so that the problem that the locking is difficult to adjust after clinical locking is solved, and the operation difficulty of medical workers is reduced; 2. the conical sealing plug can realize the complete sealing of a human body and the outside, and effectively avoid secondary infection caused by air leakage and liquid leakage. 3. The bracing piece can effectively fix the clamp plate, strengthens the locking effect, prevents that locking line becomes flexible the complication such as displacement, slippage that arouses. 4. The tube seat and the adjustable locking system are smooth in structural surface, the threading and fixing modes of the locking wire are simple, and the risk of breakage of the locking wire in the operation process can be reduced. The material of the locking line is stretch-proof, but the resistance to radial shear force is poor, so that the surface of the designed structure is smooth, and the influence of edges and corners or other protrusions on the locking line is reduced; the locking mode gives up the traditional winding mode and designs simpler external force action.

Drawings

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

FIG. 1 shows an overall configuration of the present invention

FIG. 2 shows a cross-sectional view of an adjustable locking system of the present invention

FIG. 3 shows a base detail view of the locking system of the present invention

Figure 4 shows a detail view of a support bar according to the utility model

FIG. 5A shows platen detail view of the present invention from an oblique top view FIG. 5B shows platen detail view of the present invention from an oblique bottom view

FIG. 6A shows a side view of a torsion spring component of the present invention

FIG. 6B shows a front view of the torsion spring component of the present invention

FIG. 7 shows a cross-sectional view of the tip of the drainage tube body of the present invention

FIG. 8 illustrates a method of use diagram of the present invention

The respective symbols in the figure are as follows:

1. locking system base

2. Locking wire

3. Support rod

4. Torsion spring

5. Pressing plate

6. Conical sealing plug

7. Tube holder

8. Drainage tube body

9. Developing ring

10. First rotation axis

11. Second rotation axis

12.55 degree British fine thread

13. Anti-skid lines

21. Fixed end of locking wire

22. Free end of locking wire

31. Straight rod

51. Pressing plate pressing part

52. Pressing plate pressing part

101. Base limiting groove of locking system

102. Locking system base ramp

103. Wedge-shaped groove

104. Locking system base limiting hole

105. Taper hole

106. Locking system base inner cavity line hole

107. Locking luer internal taper connector 108. drainage lumen

109. Top plane

110. Left side wall

111. Right side wall

112. Front support 1101, first locking system base shaft hole 1111, second locking system base shaft hole 113, inlet end

114. Liquid outlet end

115. Grip joint

301. Shaft hole of support rod

302. Head end 401 of support rod torsion bar on torsion spring

402. Torsion spring lower torsion bar

501. Pressure plate limiting groove

502. Pressing plate groove

5021. Projection

503. Pressed noodles

504. Pressure plate wedge structure 505, first pressure plate shaft hole 506, second pressure plate shaft hole 507, third pressure plate shaft hole 508, fourth pressure plate shaft hole 509, pressure plate right leg

510. Left leg of pressing plate

511. Baffle surface

801. Drainage side hole

802. A first tube body wire hole 803, a second tube body wire hole 804, a tail end of the drainage tube body

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the utility model without any inventive step, are within the scope of protection of the utility model.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and claims of the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one.

As shown in reference to figures 1 to 8,

a percutaneous puncture biliary tract drainage tube with an adjustable locking system comprises a drainage tube body 8, a tube seat 7 and the adjustable locking system; the front end of the adjustable locking system is fixedly connected and communicated with the tail end of the drainage tube body 8 through a tube seat 7;

the adjustable locking system is composed of a locking line 2, a pressing plate 5, a torsion spring 4, a locking system base 1, a conical sealing plug 6, a first rotating shaft 10, a second rotating shaft 11 and a supporting rod 3, and a drainage inner cavity 108 with two open ends is formed in the locking system base.

The locking system base 1 is a carrier of other components of the locking system, and the pressure plate 5 and the torsion spring 4 are arranged on the top plane of the locking system base and connected by a first rotating shaft 10; the supporting rod 3 and the pressing plate 5 are connected by a second rotating shaft 11 in the same way; the conical sealing plug is placed in a conical hole 105 made in the base of the locking system.

The locking system base 1 is internally provided with a drainage inner cavity 108 with two open ends, the front part is a liquid inlet end 113, the rear part is a liquid outlet end 114, and the middle part is a holding connecting part 115; the liquid inlet end 113 adopts 55-degree British fine thread which has good looseness prevention and sealing performance and is used for being tightly connected with the pipe seat 7, so that the phenomena of looseness of the fixed end 21 of the locking wire assembled in the liquid inlet end and liquid leakage of a system can be prevented; the outlet end 114 is in the shape of a locking luer internal cone connector 107 and can be connected with a three-way valve and a drainage bag (the three-way valve and the drainage bag are necessary instruments for operation and are irrelevant to the utility model).

A bottom plane 109 is arranged above the holding connecting part 115, a left side wall 110 and a right side wall 111 are respectively arranged at two sides of the bottom plane 109, a front supporting part 112 is arranged at the front part of the bottom plane 109, and the left side wall, the right side wall and the front supporting part are integrally connected; a first locking system base shaft hole 1101 is formed in the middle of the left side wall 110, and a second locking system base shaft hole 1111 is formed in the middle of the right side wall 111; a locking system base limiting groove 101 is formed in the position, close to the rear part, of the top plane 109, the locking system base limiting groove 101 is L-shaped, one end of the locking system base limiting groove 101 is connected with the left side wall 110, and the other end of the locking system base limiting groove faces the direction of the front supporting part 112 and is used for limiting the position of a lower torsion bar 402 of the torsion spring 4; a locking system base limiting hole 104 is arranged in the bottom plane 109 close to the liquid outlet end 114, when the pressing plate needs to be locked, the supporting rod 3 on the pressing plate is rotated, and the head end 302 of the supporting rod is placed in the locking system base limiting hole 104.

The pressing plate 5 is provided with a pressing plate pressing part 51 and a pressing plate pressing part 52 which are integrally formed, the pressing plate pressing part 52 is arranged at the front end of the pressing plate pressing part 51, and the included angle between the pressing plate pressing part 52 and the pressing plate pressing part 51 is less than or equal to 90 degrees; a left pressing plate leg 510 and a right pressing plate leg 509 which are integrally connected are arranged in the middle of two sides below the pressing plate pressing part 51, a first pressing plate shaft hole 505 is formed in the lower end of the left pressing plate leg, a second pressing plate shaft hole 506 is formed in the lower part of the right pressing plate leg 509, and the first pressing plate shaft hole 505 and the second pressing plate shaft hole 506 are used for connecting the pressing plate 5 and the locking system base 1; the middle part of the upper side of the pressing plate pressing part 51 is provided with a pressing plate groove 502 for placing the supporting rod 3, and the middle of the inner side of the groove is provided with two protrusions 5021 capable of clamping the supporting rod; a third pressing plate shaft hole 507 and a fourth pressing plate shaft hole 508 are formed in the two sides of the pressing plate groove 502 at the rear end of the pressing plate pressing part 51 and are used for connecting the supporting rod 3; a pressing plate limiting groove 501 is formed in the rear portion of the lower side surface of the pressing plate pressing portion 51, and is used for limiting the position of the upper torsion bar 401 of the torsion spring 4; the rear part of the pressure plate limiting groove 501 is provided with a blocking surface 511, so that the support rod 3 can be prevented from excessively rotating below the pressure plate; the bottom of the pressing plate pressing part 52 is a wedge-shaped structure 504 which is tightly matched with the wedge-shaped groove 103 of the locking system base 1, so that the sliding friction between the locking line 2 and the locking system base 1 is increased, and the locking line 2 is difficult to pull after being locked; the front side of the pressing plate pressing part 52 is a pressing surface 503, and an included angle between the pressing surface 503 and the pressing plate pressing part 51 is an acute angle.

A conical hole 105 is formed in the front supporting part 112 in the direction towards the liquid inlet end 113, the tip end of the conical hole is communicated with the drainage inner cavity 108 through an inner cavity line hole 106 of the locking system base, and a conical sealing plug 6 which is completely matched with the conical hole 105 in shape is placed in the conical hole 105; the angle between the locking system base ramp 102 of the front support 112 facing the top plane 109 and the top plane 109 is obtuse; the front end of the top plane 109 is provided with a wedge-shaped groove 103 which is matched with the wedge-shaped structure 504 below the pressing part of the pressing plate and can be matched with the wedge-shaped structure 504 of the pressing plate to press the locking line 2.

The supporting rod 3 is provided with a straight rod 31, the head end 302 of the supporting rod is hemispherical, the tail end of the supporting rod is provided with a supporting rod shaft hole 301, the shaft hole is arranged between a third pressing plate shaft hole 507 and a fourth pressing plate shaft hole 508, the rotating shafts of the third pressing plate shaft hole 507 and the fourth pressing plate shaft hole 508 are connected through a second rotating shaft 11, and the supporting rod 3 can rotate axially.

The conical sealing plug 6 is made of high polymer materials and has high elasticity, friction coefficient and deformation resistance; is placed in the taper hole 105 of the locking system base 1, blocks the locking system base inner cavity line hole 106 and presses the locking line 2. In the prior art, the locking line has smooth surface and higher toughness, the twitching process is not easy to control and easy to retract, so that the pig tail rebounds, the risk is increased for the operation, and the operation time is prolonged.

The utility model innovatively designs the taper hole 105 and the tapered sealing plug 6 matched with the taper hole, the locking line 2 is arranged between the taper hole 105 and the tapered sealing plug, the tapered sealing plug cannot move, when the pressing plate is loosened to pull the locking line 2 outwards, the part of the tapered sealing plug, which is contacted with the locking line, can be slightly deformed, so that the locking line is smoothly pulled out; when the pumping is stopped, the conical sealing plug continuously presses the locking wire under the action of the resilience force, so that the locking wire is prevented from being withdrawn; the conical sealing plug increases the sliding friction when the locking wire is drawn, and can better control the pig tail to form a loop. When locking, the conical sealing plug is sealed in the conical hole and expands in the conical hole due to the extrusion of the pressing surface 503 of the pressing plate, so that the inner cavity line hole 106 is not communicated with the external environment, and the phenomena of air leakage, liquid leakage and the like are effectively prevented.

The first rotating shaft 10 sequentially penetrates through a first locking system base shaft hole 1101, a first pressure plate shaft hole 505, a torsion spring 4, a second pressure plate shaft hole 506 and a second locking system base shaft hole 1111, and fixes a pressure plate 5 above the locking system base 1; the torsion spring 4 is fixed between the pressure plate 5 and the locking system base 1; the pressing surface 503 of the pressing plate can be completely attached to the inclined surface 102 of the locking system base; the second rotating shaft 11 passes through the third pressing plate shaft hole 507, the supporting rod shaft hole 301 and the fourth pressing plate shaft hole 508, the supporting rod 3 is fixed at the tail end of the pressing plate 5, and the angle between the supporting rod 3 and the pressing plate is 90 degrees after the supporting rod enters the locking system base limiting hole 104.

The torsion spring 4 is located between the locking system base 1 and the pressing plate 5, the upper torsion bar 401 of the torsion spring is arranged in the pressing plate limiting groove 501, and the lower torsion bar 402 of the torsion spring is arranged in the locking system base limiting groove 101. The torsional spring material is stainless steel, and the line footpath is 0.6mm, and coil external diameter 3mm, coil internal diameter 2.4mm, torsion bar length 4mm, effective number of turns 4. The angle of the two torsion bars of the torsion spring is approximately equal to 90 degrees in a normal state, the angle of the two torsion bars of the torsion spring is approximately equal to 45 degrees after the torsion spring is assembled in the locking system, and the elastic force generated by the torsion spring enables the pressing plate to be tightly pressed on the base of the locking system.

The tip of the drainage tube body is pre-shaped and curled into a pigtail shape, and the pigtail shape is retained in a biliary tract or a gallbladder to play a role in fixation; the 6 drainage side holes 801 are uniformly distributed on the curled inner side of the pigtail, the size of each drainage side hole is 2.5mm multiplied by 0.5mm, the hole-to-hole distance is 8mm, the drainage effect is ensured by the 6 drainage side holes and the large aperture, and the tube body is prevented from being deformed when being curled or extruded at proper intervals; the drainage side holes are distributed at the curled inner side of the tip end of the tube body and are not in direct contact with the biliary tract or the cystic wall, so that the risk of tube body blockage is greatly reduced; two body line holes, first body line hole 802 have been seted up to 8 pointed ends of drainage tube body: 9mm from the tip of the catheter; second tube line hole 803: 80mm from the tip of the catheter; along with the twitching of the locking thread, the distance between the two tube body thread holes is the perimeter of the pigtail loop, the diameter of the pigtail is about 22mm, and the pigtail can be stably fixed in most biliary tracts (the diameter of a normal common bile duct is about 6mm-8mm, the biliary tracts are obviously expanded after being blocked, the diameter of the blocked part can exceed 10mm, even 20mm, and the size of the utility model is suitable for most blocked situations); the surface of the drainage tube body 8 is marked with scale marks, so that doctors can conveniently judge the puncture depth in the operation and the nursing after the operation (the medical staff can preliminarily judge whether the drainage tube deviates from the scales, and the scales are in the prior art); the pigtail end has the ring 9 that develops, and the ring that develops under the X-ray, makes things convenient for the doctor to track drainage tube tip position, and whole drainage tube body 8 all can clearly develop under the X-ray.

The pipe seat 7 is internally provided with a 55-degree British fine thread 12 which has good looseness prevention and sealing performance and is tightly connected with the locking system base 1, so that the phenomena of looseness of a fixed end 21 of a locking wire assembled in the pipe seat and leakage of a system can be prevented; the outside is provided with anti-skid grains 13, which is beneficial to production and assembly; the tube base 7 is used for connecting the drainage tube body 8 and the adjustable locking system and fixing the fixed end 21 of the locking line.

The locking line 2 adopts a medical suture (such as 3-0 medical suture, a market product), and has smooth surface, good toughness, wear resistance and good biocompatibility; the fixed end 21 of the locking wire penetrates into a first tube body wire hole 802 from the outside of the drainage tube body, the free end 22 of the locking wire penetrates into a second tube body wire hole 803 from the outside of the drainage tube body, enters the inner cavity of the drainage tube body, and the two ends of the locking wire are led out from the tail end 804 of the drainage tube body and pass through the tube seat 7; the fixed end 21 of the locking wire is tightly fixed with the tube seat 7 through the 55-degree British fine thread 12 of the locking system base 1 and is kept at the tube seat 7; the free end 22 of the locking wire passes through the drainage lumen 108 of the locking system base 1 and the locking system base lumen hole 106 in sequence and is led out from the taper hole 105.

The above listing of a series of detailed descriptions is merely a detailed description of possible embodiments of the present invention and is not intended to limit the scope of the utility model, and one skilled in the art may devise many other modifications and embodiments that will fall within the spirit and scope of the principles disclosed herein. More specifically, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, other uses will also be apparent to those skilled in the art.

Claims (15)

1. The utility model provides a percutaneous aspiration biliary tract drainage tube of adjustable locking system which characterized in that: consists of a drainage tube body, a tube seat and an adjustable locking system; the front end of the adjustable locking system is fixedly connected and communicated with the tail end of the drainage tube body through a tube seat;

the adjustable locking system is composed of a locking line, a pressing plate, a torsion spring, a locking system base, a conical sealing plug, a first rotating shaft, a second rotating shaft and a supporting rod, and a drainage inner cavity with openings at two ends is formed in the locking system base.

2. The percutaneous transluminal biliary drainage tube of an adjustable locking system of claim 1, wherein: the locking system base is a bearing body of other components of the locking system, and the pressure plate and the torsion spring are arranged on the top plane of the locking system base and connected by a first rotating shaft; the supporting rod is connected with the pressing plate by a second rotating shaft; the conical sealing plug is arranged in a conical hole formed in the locking system base.

3. The percutaneous transluminal biliary drainage tube of an adjustable locking system of claim 2, wherein: the locking system base is internally provided with a drainage inner cavity with openings at two ends, the front part is a liquid inlet end, the rear part is a liquid outlet end, and the middle part is a holding connecting part; the liquid inlet end adopts fine thread and is tightly connected with the pipe seat; the shape of the liquid outlet end is a locking luer inner conical joint.

4. The percutaneous transluminal biliary drainage tube of an adjustable locking system of claim 3, wherein: a bottom plane is arranged above the holding connecting part, a left side wall and a right side wall are respectively arranged on two sides of the bottom plane, a front supporting part is arranged at the front part of the bottom plane, and the left side wall, the right side wall and the front supporting part are integrally connected; a first locking system base shaft hole is formed in the middle of the left side wall, and a second locking system base shaft hole is formed in the middle of the right side wall; a locking system base limiting groove is arranged on the top plane close to the rear part, is L-shaped, and is used for limiting the position of a lower torsion bar of the torsion spring, one end of the locking system base limiting groove is connected with the left side wall, and the other end of the locking system base limiting groove faces the direction of the front supporting part; a locking system base limiting hole is arranged in the bottom plane and close to the liquid outlet end.

5. The percutaneous transluminal biliary drainage tube of an adjustable locking system of claim 1, wherein: the pressing plate 5 is provided with a pressing plate pressing part and a pressing plate pressing part which are integrally formed, the pressing plate pressing part is arranged at the front end of the pressing plate pressing part, and the included angle between the pressing plate pressing part and the pressing plate pressing part is less than or equal to 90 degrees; the middle parts of two sides below the pressing part of the pressing plate are provided with a left leg and a right leg of the pressing plate which are integrally connected, the lower end of the left leg of the pressing plate is provided with a first pressing plate shaft hole, the lower part of the right leg of the pressing plate is provided with a second pressing plate shaft hole, and the first pressing plate shaft hole and the second pressing plate shaft hole are used for connecting the pressing plate and the locking system base; the middle of the upper side of the pressing part of the pressing plate is provided with a pressing plate groove for placing the supporting rod, and the middle of the inner side of the groove is provided with two bulges which can clamp the supporting rod; a third press plate shaft hole and a fourth press plate shaft hole are formed in the two sides of the press plate groove at the rear end of the press part of the press plate and used for connecting the supporting rod; the rear part of the lower side surface of the pressing part of the pressing plate is provided with a pressing plate limiting groove for limiting the position of an upper torsion bar of the torsion spring; the rear part of the pressure plate limiting groove is provided with a blocking surface which can prevent the supporting rod from excessively rotating to the lower part of the pressure plate; the bottom of the pressing plate pressing part is of a wedge-shaped structure; the front side of the pressing part of the pressing plate is a pressing surface, and an included angle between the pressing surface and the pressing part of the pressing plate is an acute angle.

6. The percutaneous transluminal biliary drainage tube of an adjustable locking system of claim 4, wherein: the front supporting part is provided with a taper hole towards the liquid inlet end, the tip end of the front supporting part is communicated with the drainage inner cavity through an inner cavity line hole of the locking system base, and a tapered sealing plug which is completely matched with the taper hole in shape is placed in the taper hole; an included angle between the inclined plane of the locking system base of the front supporting part facing the top plane and the top plane is an obtuse angle; the front end of the top plane is provided with a wedge-shaped groove which is matched with the wedge-shaped structure below the pressing plate pressing portion and can be matched with the pressing plate wedge-shaped structure to press the locking line.

7. The percutaneous transluminal biliary drainage tube of an adjustable locking system of claim 1, wherein: the supporting rod is provided with a straight rod, the head end of the supporting rod is hemispherical, the tail end of the supporting rod is provided with a supporting rod shaft hole, the shaft hole is arranged between the third pressing plate shaft hole and the fourth pressing plate shaft hole, the rotating shafts of the third pressing plate shaft hole and the fourth pressing plate shaft hole are connected through a second rotating shaft, and the supporting rod can rotate axially.

8. The percutaneous transluminal biliary drainage tube of an adjustable locking system of claim 1, wherein: the conical sealing plug is made of high polymer materials and has high elasticity, friction coefficient and deformation resistance; the locking wire is placed in a taper hole of a locking system base, a wire hole of an inner cavity of the locking system base is plugged, and the locking wire is pressed.

9. The percutaneous transluminal biliary drainage tube of an adjustable locking system of claim 1, wherein: the first rotating shaft sequentially penetrates through a first locking system base shaft hole, a first pressure plate shaft hole, a torsion spring, a second pressure plate shaft hole and a second locking system base shaft, and the pressure plate is fixed above the locking system base; the torsion spring is fixed between the pressing plate and the locking system base; the pressing surface of the pressing plate can be completely attached to the inclined surface of the locking system base; the second rotating shaft penetrates through the third pressing plate shaft hole, the supporting rod shaft hole and the fourth pressing plate shaft hole, the supporting rod is fixed at the tail end of the pressing plate, and the angle between the supporting rod and the pressing plate is 65-100 degrees after the supporting rod enters the limiting hole of the locking system base.

10. The percutaneous transluminal biliary drainage tube of an adjustable locking system of claim 9, wherein: the angle between the supporting rod and the pressing plate is 90 degrees after the supporting rod enters the limiting hole of the locking system base.

11. The percutaneous transluminal biliary drainage tube of an adjustable locking system of claim 4, wherein: the torsion spring is positioned between the locking system base and the pressing plate, the upper torsion bar of the torsion spring is arranged in the pressing plate limiting groove, and the lower torsion bar of the torsion spring is arranged in the locking system base limiting groove.

12. The percutaneous transluminal biliary drainage tube of an adjustable locking system of claim 1, wherein: the tip of the drainage tube body is pre-shaped and curled into a pigtail shape; the 6 drainage side holes are uniformly distributed on the curled inner side of the pigtail; the tip end of the flow pipe body is provided with two pipe body line holes, namely a first pipe body line hole and a second pipe body line hole; the surface of the drainage tube body is marked with scale marks; the tail end of the pig tail is provided with a developing ring.

13. The percutaneous transluminal biliary drainage tube of an adjustable locking system of claim 12, wherein: the size of the drainage side hole is 2.5mm multiplied by 0.5mm, and the distance between holes is 8 mm; the distance between the first pipe body line hole and the tip end of the catheter is 9 mm; the second tube string hole is 80mm from the tip of the catheter.

14. The percutaneous transluminal biliary drainage tube of an adjustable locking system of claim 1, wherein: the interior of the pipe seat is provided with 55-degree English fine thread which is tightly connected with the locking system base; the outside is provided with anti-skid lines.

15. The percutaneous transluminal biliary drainage tube of an adjustable locking system of claim 1, wherein: the locking line is a medical suture line; the fixed end of the locking wire penetrates into the first tube body wire hole from the outside of the drainage tube body, the free end of the locking wire penetrates into the second tube body wire hole from the outside of the outer body of the drainage tube body, enters the inner cavity of the drainage tube body, and the two ends of the locking wire are led out from the tail end of the drainage tube body and penetrate through the tube seat; the fixed end of the locking wire is screwed and fixed with the pipe seat through the fine thread of the locking system base, and is kept at the pipe seat; and the free end of the locking wire sequentially passes through the drainage inner cavity of the locking system base and the inner cavity wire hole of the locking system base and is led out from the taper hole.

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