CN218900532U - Peeling sheath tube suitable for percutaneous nephrocentesis ostomy - Google Patents

Abstract

The utility model discloses a peeling sheath tube suitable for percutaneous nephrocentesis, which belongs to the technical field of medical instruments and comprises a sheath tube body, wherein a tearing line group penetrating through the sheath tube body along the axis direction of the sheath tube body is arranged on the sheath tube body, the tearing line group comprises a first tearing line and a second tearing line which are arranged in parallel, the sheath tube body is divided into a fixing part and a tearing part by the first tearing line and the second tearing line, the central angle corresponding to the cross section of the fixing part is a first angle, the central angle corresponding to the cross section of the tearing part is a second angle, the first angle is larger than the second angle, and the fixing part can be detachably and slidably arranged on the outer surface of a fistulization tube after the tearing part is torn along the first tearing line, the second tearing line and the fixing part. The utility model has convenient use, the fixing part can be detachably and slidably arranged in the fistulization pipe after the tearing part is torn off, and the fixing part is continuously used as a working channel for putting the dilator or the fistulization pipe again, thereby reducing the defect of operation and improving the working efficiency of medical staff.

Description

Peeling sheath tube suitable for percutaneous nephrocentesis ostomy

Technical Field

The utility model belongs to the technical field of medical appliances, and particularly relates to a peeling sheath tube suitable for percutaneous nephrocentesis ostomy.

Background

Percutaneous nephrocentesis ostomy is a high-level urine flow diversion method, and can be used as a temporary means for treating pyogenic nephrosis, hydronephrosis or a working channel of percutaneous nephrolithotripsy and lithotomy, and can also be used as a permanent means for treating ureteral resistance diseases (such as malignant tumor compression, patients cannot tolerate plastic surgery and the like) which cannot be radically treated.

When the existing percutaneous nephropuncture fistulization operation is performed, firstly, a kidney puncture needle is punctured into a renal calyx through skin under the condition of B ultrasonic positioning, an inner core of the kidney puncture needle is pulled out, a guide wire is penetrated from a needle tube of the kidney puncture needle to a renal pelvis, then the needle tube of the kidney puncture needle is pulled out, a dilator is inserted step by step along the guide wire from a small size to a large size for expansion, after the expansion is completed, the dilator is pulled out, the dilator is sleeved into a working channel (namely a peeling sheath) corresponding to the dilator, the dilator sleeved with the peeling sheath is guided into the guide wire along the guide wire, the dilator and the guide wire are pulled out, so that the proximal end of the peeling sheath is reserved in the renal pelvis, then a double-cavity fistulization tube (hereinafter referred to as a fistulization tube) with the diameter corresponding to the inner diameter of the peeling sheath is inserted into the renal pelvis, and after the water bag is watered and fixed on the renal pelvis, the peeling sheath is pulled out and torn down.

The peeling sheath used at present is softer in texture, two tearing lines penetrating through the peeling sheath are symmetrically arranged along the middle section of the axial direction of the peeling sheath, and the peeling sheath is curled and deformed after being torn along the tearing lines, so that the working channel structure is completely lost. If the operation is wrong, the position of the catheter is poor or other treatment is improper, and when the dilator needs to be replaced, the peeling sheath is torn, so that the percutaneous nephropuncture fistulization is difficult to be carried out again, and the wound and the pain are caused to the patient.

Disclosure of Invention

The utility model provides a peeling sheath tube suitable for percutaneous nephrocentesis fistulization, which is convenient to use, and a fixing part can be detachably and slidably arranged in a fistulization tube after a tearing part is torn off, and can be continuously used as a working channel for putting a dilator or the fistulization tube again, so that the defect of operation is reduced, and the working efficiency of medical staff is improved.

In order to achieve the above object, the technical scheme of the utility model provides a peeling sheath suitable for percutaneous nephrocentesis fistulization, which comprises a sheath body, wherein a tearing line group penetrating through the sheath body along the axis direction is arranged on the sheath body, the tearing line group comprises a first tearing line and a second tearing line which are arranged in parallel, the sheath body is divided into a fixing part and a tearing part by the first tearing line and the second tearing line, the central angle corresponding to the cross section of the fixing part is a first angle, the central angle corresponding to the cross section of the tearing part is a second angle, the first angle is larger than the second angle, and the fixing part can be detachably and slidably arranged on the outer surface of the fistulization pipe after the tearing part is torn along the first tearing line, the second tearing line and the fixing part.

Further, the fixing part comprises a base layer and a bracket, and the base layer is coated on the outer surface of the bracket;

the tear-off portion includes a base layer.

Further, the base layer is made of polytetrafluoroethylene materials.

Further, the bracket includes: the first wire is arranged on one side of the first tearing line along the direction parallel to the axis of the sheath body; the second wire is arranged at one side of the second tearing line along the direction parallel to the axis of the sheath body; and the third wire adopts an arc-shaped structure, and is vertically arranged on the first wire and the second wire along the circumferential direction of the fixing part and at two ends of the fixing part respectively.

Further, the third wires are provided with a plurality of wires.

Further, the third filaments are uniformly distributed along the length direction of the sheath body.

Further, the first wire and the second wire are made of copper materials, and the third wire is made of alloy steel materials.

Further, the distal end of the tearing part is provided with a first handle, and the distal end of the fixing part is provided with a second handle.

Compared with the prior peeling sheath which is deformed in a curling way and completely loses a working channel structure after being torn along a tearing line, the peeling sheath provided by the embodiment of the utility model is suitable for percutaneous nephropuncture fistulization, wherein the first angle corresponding to the cross section of the fixing part is larger than the second angle corresponding to the cross section of the tearing part, the second angle is 90-145 degrees, the lateral opening width of the fixing part is smaller than the diameter of the sheath body, and the dilator or fistulization pipe can be prevented from falling out from the lateral opening of the fixing part; the fixing part is internally provided with a bracket, so that the fixing part can still keep the original shape after the tearing part is torn off, and the fixing part is detachably and slidably arranged on the outer surface of the fistulization pipe.

Drawings

FIG. 1 is a schematic illustration of a percutaneous nephrolithotomy sheath adapted for percutaneous puncture ostomy in accordance with an embodiment of the utility model;

FIG. 2 is a schematic illustration of the structure of a retaining portion of a dehider sheath suitable for percutaneous nephrocentesis according to an embodiment of the present utility model;

fig. 3 isbase:Sub>A sectional view taken along linebase:Sub>A-base:Sub>A in fig. 2.

Wherein: 1. a sheath body; 2. a tear line set; 3. a first tear line; 4. a second tear line; 5. a fixing part; 6. a tearing-off portion; 8. a base layer; 9. a bracket; 10. a first wire; 11. a second wire; 12. a third wire; 13. a first handle; 14. a second handle;

in the figure, the second angle is B.

Detailed Description

The present utility model will now be described in detail with reference to the drawings and examples, wherein the examples are intended to be illustrative of only some, but not all, of the examples. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1 to 3, an embodiment of the present utility model provides a peeling sheath suitable for percutaneous nephrolithotomy, which comprises a sheath body 1, wherein a tearing line set 2 penetrating the sheath body 1 along an axis direction parallel to the sheath body 1 is provided on the sheath body, the tearing line set 2 comprises a first tearing line 3 and a second tearing line 4 which are arranged in parallel, the sheath body 1 is divided into a fixing portion 5 and a tearing portion 6 by the first tearing line 3 and the second tearing line 4, a central angle corresponding to a cross section of the fixing portion 5 is a first angle, a central angle corresponding to a cross section of the tearing portion 6 is a second angle, the first angle is larger than the second angle, and the fixing portion 5 can be detachably and slidably mounted on an outer surface of a fistulization tube after the tearing portion 6 is torn along the first tearing line 3 and the second tearing line 4 with the fixing portion 5. The lateral opening width of the fixing part 5 is smaller than the diameter of the sheath body 1 because the first angle is larger than the second angle, so that the dilator or the fistulization tube can be prevented from falling out of the lateral opening of the fixing part 5; after the tearing-off portion 6 has been torn off the fixing portion 5, the fixing portion 5 can be detachably slidably mounted on the outer surface of the ostomy tube while maintaining its original shape.

As shown in fig. 2 and 3, in some embodiments, the fixing portion 5 includes a base layer 8 and a support 9, the base layer is coated on the outer surface of the support 9, the support 9 includes a first wire 10, a second wire 11 and a third wire 12, where the first wire 10 is disposed on one side of the first tear line 3 along a direction parallel to the axis of the sheath body 1; the second wire 11 is arranged on one side of the second tearing line 4 along the direction parallel to the axis of the sheath tube body 1; the third wire 12 adopts an arc-shaped structure, and the third wire 12 is vertically arranged on the first wire 10 and the second wire 11 along the circumferential direction of the fixing part 5 at two ends of the fixing part. The tear-off portion 6 comprises a base layer 8. Wherein, the base layer 8 can be coated on the bracket 9 by adopting a molding or other methods, so that the fixing part 5 forms an integral structure; the fixing part 5 is internally provided with a bracket 9, so that the fixing part 5 can still keep the original shape after the tearing part 6 is torn off; the tearing part 6 is free of a bracket 9, and is soft in material and easy to tear from the fixing part.

Further, the third wires 12 are provided with a plurality of wires, which can provide effective supporting force for the base layer 8 of the fixing portion 5, so that the fixing portion 5 can be detachably and slidably mounted on the dilator or the fistulization tube.

Preferably, the third wires 12 are uniformly distributed along the length direction of the sheath body 1, and the third wires 12 provide uniform supporting force to the substrate of the fixing portion 5, so that the fixing portion 5 can uniformly maintain its original shape after the tearing portion 6 is torn off, and is easy to remove from the fistulization tube after operation.

Preferably, the base layer 8 is made of polytetrafluoroethylene material, has good non-stick performance, and can establish a smooth working channel for the dilator and the fistulization tube. The first wire 10 and the second wire 11 are made of copper material, are easy to bend to different angles, and are suitable for the bending angle of the fistulization tube. The third wire 12 is made of an elastic alloy steel material, so that the fixing piece can keep the initial shape after the tearing part 6 is torn away from the fixing part 5, and the opening of the third wire 12 is easily opened, and the fixing part 5 is taken down from the dilator or the fistulization tube.

As shown in fig. 3, the second angle is preferably 90-145 deg., which ensures a stable sliding mounting of the anchoring portion 5 on the dilator or the ostomy tube.

As shown in fig. 1 and 2, in some embodiments, the tearing portion 6 is provided with a first handle 13 at a distal end thereof, and the fixing portion 5 is provided with a second handle 14 at a distal end thereof, so that an operator can control the first and second handles 14 from the distal end thereof to tear the tearing portion 6 from the fixing portion 5.

In the peeling sheath tube suitable for percutaneous nephrocentesis, the first angle corresponding to the cross section of the fixing part 5 is larger than the second angle corresponding to the cross section of the tearing part 6, the second angle is 90-145 degrees, the lateral opening width of the fixing part 5 is smaller than the diameter of the sheath tube body 1, and the bracket 9 of the fixing part 5 is provided with the arc-shaped third wire 12 made of elastic alloy steel, so that after the tearing part 6 is torn off the fixing part 5, the fixing part 5 can keep the original shape and be detachably and slidably mounted on the outer surface of the fistulization tube, when in operation failure, the expander can be placed in the fixing part 5 again, and the guide wire can be reinserted into the renal pelvis to further operate and save the operation.

The "far" and "near" are used as references of the patient, and the "far" is a direction away from the patient, and the "near" is a direction close to the patient.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be regarded as the scope of the description.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (8)

1. The utility model provides a sheath of skinning suitable for percutaneous nephrocentesis fistulization, includes the sheath body, is equipped with on the sheath body and runs through its last tear line group along being on a parallel with its axis direction, its characterized in that, tear line group includes parallel arrangement's first tear line and second tear line, first tear line with the second tear line divide into fixed part and tear the portion with the sheath body, and the central angle that the fixed part cross section corresponds is first angle, and the central angle that the tear portion cross section corresponds is the second angle, first angle is greater than the second angle, tear the portion along first tear line with after the second tear line with the fixed part is torn, fixed part can detachable slidable mounting in fistulization surface.

2. A sheath for percutaneous nephrocentesis as claimed in claim 1, wherein said anchor portion comprises a base layer and a stent, said base layer being coated on an outer surface of said stent;

the tear-off portion includes a base layer.

3. A sheath for percutaneous nephrocentesis as claimed in claim 2, wherein said base layer is of polytetrafluoroethylene material.

4. A dehider sheath for use in a percutaneous nephrocentesis according to claim 3, wherein the stent comprises: the first wire is arranged on one side of the first tearing line along the direction parallel to the axis of the sheath body; the second wire is arranged at one side of the second tearing line along the direction parallel to the axis of the sheath body; and the third wire adopts an arc-shaped structure, and is vertically arranged on the first wire and the second wire along the circumferential direction of the fixing part and at two ends of the fixing part respectively.

5. A sheath for percutaneous nephrolithotomy as in claim 4, wherein said third filaments are provided in a plurality.

6. A sheath for percutaneous nephrolithotomy as in claim 5, wherein a plurality of said third filaments are uniformly distributed along the length of the sheath body.

7. A sheath for percutaneous nephrocentesis as set forth in claim 4, wherein said first and second wires are formed of a copper material and said third wire is formed of an alloy steel material.

8. A sheath for percutaneous nephrocentesis as claimed in claim 1, wherein said tear-away portion is provided with a first handle at a distal end thereof and said securing portion is provided with a second handle at a distal end thereof.

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