CN217659802U - Bent sheath tube and guide sheath - Google Patents

Abstract

The utility model relates to the field of medical equipment, in particular to a bending sheath tube and a guide sheath, which sequentially comprise a second tube section, a first tube section and a third tube section along the length direction of the bending sheath tube, wherein the second tube section, the first tube section and the third tube section are mutually connected, the first tube section is arranged to be bendable and comprises a first inner tube, a first braided tube, an elastic tube and a first outer tube, and the elastic tube supports the whole first tube section and provides elastic force for the first tube section; the third outer tube is a front-end tube and is used for abutting against and expanding the ureter, when the third outer tube meets a bent part in the ureter, the third outer tube can be passively bent, the third tube section comprises a third inner tube, a third braided tube and a third outer tube, and the outer surface of the third outer tube is a conical surface, so that the bending of the third tube section is facilitated. The utility model discloses a set up first pipeline section into crooked position, set up the third pipeline section into the tip portion of easily bending and turning to be favorable to the guide sheath to advance in the ureter.

Description

Bent sheath tube and guide sheath

Technical Field

The utility model relates to the field of medical equipment, concretely relates to crooked sheath pipe and guide sheath.

Background

When the ureter soft lens is used for carrying out the operation of lithotripsy of the urinary system in clinic, a ureter guide sheath is needed to be used, and the ureter guide sheath needs to be inserted into a ureter of a human body. In fact, the ureter is narrow and curved, and the ureteral guide sheath is placed without observation by monitoring equipment, so that the problems of perforation, breakage, bleeding and the like of ureteral mucosa are easy to occur, and even complications can occur in severe cases, and the patients are injured.

The prior ureter guide sheath is a straight tube type sheath, the guide sheath is hard in tube, and when the guide sheath meets a bent ureter section, the guide sheath is difficult to enter in the advancing process, and the ureter is also damaged when the guide sheath is advanced strongly.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the inconvenient defect of sheath pipe threading among the prior art to a crooked sheath pipe and guide sheath are provided.

In order to solve the above problems, the present invention provides a curved sheath tube, which comprises a first tube section including a first inner tube, an elastic tube and a first outer tube; a second tube section; and a third tube section comprising a third inner tube, a third braided tube, and a third outer tube; the second pipe section and the third pipe section are respectively arranged on two sides of the first pipe section.

Optionally, the second tube segment includes a second inner tube, a second braided tube, and a second outer tube, the second braided tube being disposed between the second inner tube and the second outer tube.

Optionally, the first pipe section further includes a first braided pipe, and the elastic pipe is sleeved on the first braided pipe.

Optionally, the second braided tube, the first braided tube and the third braided tube are of an integrated structure.

Optionally, the outer surface of the third outer tube is a conical surface.

Optionally, the elastic tube is a spring tube.

Optionally, the second inner tube, the first inner tube and the third inner tube are of an integrated structure.

Optionally, the third outer tube and the first outer tube are of an integrated structure.

Optionally, the third outer tube is a transparent tube.

The utility model also provides a guide sheath, including foretell crooked sheath pipe.

The utility model has the advantages of it is following:

1. in the scheme, the end part of the third pipe section is designed into a circular arc shape, so that when the guide sheath is pushed forwards under the pushing of external force, the guide sheath can not be clamped by the bent part of the soft lens in the process that the guide sheath can be continuously pushed forwards along with the bending of the soft lens, and the guide function is achieved;

2. in the scheme, the elastic pipe is arranged in the first pipe section, the elastic pipe plays a role in supporting and increasing the elastic force to the first pipe section, the first pipe section can be arranged in a bendable manner and can be bent when meeting bending, passive guiding is carried out, and in the bending process, the elastic pipe can reduce the phenomenon that the first pipe section is bent and folded, so that the medium in the pipeline is protected from flowing;

3. the third outer tube of the third tube section is soft and transparent so as to reduce the damage to the inner wall of the ureter.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 shows a cross-sectional view of a curved sheath according to an embodiment of the invention;

fig. 2 showsbase:Sub>A cross-sectional view alongbase:Sub>A-base:Sub>A in fig. 1.

Description of reference numerals:

1. a first tube section; 2. a second tube section; 3. a third tube section; 11. a first inner tube; 12. a first braided tube; 13. an elastic tube; 14. a first outer tube; 21. a second inner tube; 22. a second braided tube; 23. a second outer tube; 31. a third inner tube; 32. a third braided tube; 33. a third outer tube; 34. a conical surface.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "second," "first," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, 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 meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

At present, ureter guide sheaths on the market are straight tube-shaped sheaths and are rigid sheath tubes, and ureters are narrow and bent, so that the rigid guide sheath tubes are not easy to penetrate into the bent and narrow ureters, and especially when the conditions of the ureters are complicated, the rigid guide sheath is more difficult to penetrate and even damages the ureters.

Referring to fig. 1 and 2, the present invention discloses a guiding sheath, which comprises a curved sheath tube and a joint (not shown in the figure), wherein the end of the curved sheath tube is connected to the joint, the joint is operated by an operator to connect the curved sheath tube and other inlet and outlet pipelines, and the front end of the curved sheath tube can be passively bent when abutting against the wall of a soft ureter. The bent sheath tube comprises a first tube section 1, a second tube section 2 and a third tube section 3, wherein the second tube section 2 and the third tube section 3 are respectively arranged on two sides of the first tube section 1, the second tube section 2 is close to the joint, and the third tube section 3 is a passively bendable end part and used for abutting against the wall of the ureter. The second pipe section 2, the first pipe section 1 and the third pipe section 3 are mutually and continuously connected together to form the whole bent sheath pipe.

Crooked sheath pipe in this scheme is the crooked sheath pipe of passive form, meets crooked then, can go deep into the position that the guide sheath need reach along with the guide of soft mirror, can reach more depths, has bigger application range. No matter examination or operation, better use effect can be achieved. The head of the third pipe section 3 has a rounded arc transition structure, so that the third pipe section cannot be clamped when being guided to push a corner. The first pipe section 1 is soft and easy to guide, but is not compressed back and forth; the inner lining is arranged in the tube and cannot be flattened; the bent pipe cannot be folded into a right angle, so that the pipeline passage is reduced. The curvature will only become circular arc shape, keeping the diameter of the channel unchanged.

The second tube section 2 comprises a second inner tube 21, a second braided tube 22 and a second outer tube 23 from inside to outside in sequence, the second braided tube 22 is made of metal and is braided by stainless steel wires, and the second braided tube 22 is fused between the second inner tube 21 and the second outer tube 23.

First pipeline section 1 includes first inner tube 11, first woven tube 12, elasticity pipe 13 and first outer tube 14 from inside to outside in proper order, and wherein, elasticity pipe 13 is the spring pipe, and elasticity pipe 13 cover is established on first woven tube 12, increases the elasticity of first pipeline section 1, and the first pipeline section 1 department of being convenient for is crooked, and in addition, elasticity pipe 13 still plays the supporting role, prevents that first pipeline section 1 from buckling in bending process, if the condition of crease appears, causes intraductal medium to block. The first braided tube 12 is similarly formed by braiding stainless steel wires, the first braided tube 12 is connected with the second braided tube 22, and the first braided tube 12 and the elastic tube 13 are both fused between the first inner tube 11 and the first outer tube 14.

The third tube section 3 includes a third inner tube 31, a third braided tube 32, and a third outer tube 33 in this order from the inside to the outside, the third braided tube 32 is formed by braiding stainless steel wires, and the third braided tube 32 is fused between the third inner tube 31 and the third outer tube 33.

In this embodiment, the second braided tube 22, the first braided tube 12 and the third braided tube 32 are of an integrated structure, that is, the second braided tube 22, the first braided tube 12 and the third braided tube 32 are all the same braided tube, and the structural materials are the same and are mutually consecutive, and only the tube sections are different.

In this scheme, second inner tube 21, first inner tube 11 and third inner tube 31 formula structure as an organic whole, and second inner tube 21, first inner tube 11 and third inner tube 31 are the same pipeline, and the material is all the same and link up the setting, and only the pipeline section that is located is different.

In the present embodiment, the first outer tube 14 and the third outer tube 33 are both of an integrated structure, that is, the first outer tube 14 and the third outer tube 33 are made of the same material and continuously disposed, and only the located tube sections are different, the materials of the second outer tube 23 and the first outer tube 14 are different from the materials of the third outer tube 33, and the first outer tube 14 and the second outer tube 23 are fused together. The first outer tube 14 and the third outer tube 33 are both transparent tubes and are flexible tubes, so that the condition inside and outside the pipeline can be observed conveniently, and meanwhile, when the flexible first outer tube 14 and the flexible third outer tube 33 contact the inner wall of the ureter, the damage to the inner wall of the ureter can be reduced.

The outer surface of the third outer tube 33 is a conical surface 34, and the diameter of the third outer tube 33 gradually decreases from the end close to the first outer tube 14 to the end far away from the first outer tube 14, so as to form a rounded arc-shaped transition structure, which is beneficial for the third outer tube 33 to bend to one side when the third outer tube 33 is abutted to the inner wall of the ureter. It should be noted that the conical surface 34 is different from other special-shaped surfaces, and when a force is applied in any one direction, the third outer tube 33 can be bent in a corresponding one direction, and the third outer tube 33 can be interfered in a direction of 360 °. On the other hand, since the ureter is in a contracted state when the guide sheath advances, and the ureter is in an expanded state when the guide sheath passes, the third outer tube 33 provided with the conical surface 34 has a favorable expansion effect when advancing, and even if the ureter smoothly expands, the damage to the ureter is further reduced compared to the conventional cylindrical outer tube.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. And obvious variations or modifications derived therefrom are intended to be within the scope of the invention.

Claims (10)

1. A curved sheath, comprising: the method comprises the following steps:

a first pipe section (1) comprising a first inner pipe (11), an elastic pipe (13) and a first outer pipe (14);

a second tube section (2); and

a third tube section (3) comprising a third inner tube (31), a third braided tube (32) and a third outer tube (33);

the second pipe section (2) and the third pipe section (3) are respectively arranged on two sides of the first pipe section (1).

2. The curved sheath of claim 1, wherein: the second tube section (2) comprises a second inner tube (21), a second braided tube (22) and a second outer tube (23), the second braided tube (22) being arranged between the second inner tube (21) and the second outer tube (23).

3. The curved sheath of claim 2, wherein: the first pipe section (1) further comprises a first braided pipe (12), and the elastic pipe (13) is sleeved on the first braided pipe (12).

4. The curved sheath of claim 3, wherein: the second braided tube (22), the first braided tube (12), and the third braided tube (32) are of a unitary construction.

5. The curved sheath of claim 1 or 4, wherein: the outer surface of the third outer pipe (33) is a conical surface (34).

6. The curved sheath of claim 1 or 3, wherein: the elastic tube (13) is a spring tube.

7. The curved sheath of claim 3, wherein: the second inner pipe (21), the first inner pipe (11) and the third inner pipe (31) are of an integrated structure.

8. The curved sheath of claim 5, wherein: the third outer pipe (33) and the first outer pipe (14) are of an integrated structure.

9. The curved sheath of claim 1, wherein: the third outer tube (33) is a transparent tube.

10. An introducer sheath, comprising: comprising a curved sheath according to any one of the preceding claims 1-9.

Images