Extension tube of skin dilator

Abstract

The utility model relates to a skin dilator extension tube which comprises a flexible tube body, the inner wall of one end of the flexible tube body is fixedly connected with a first metal connecting tube, the other end of the flexible tube body is communicated with a communicating chamber, the communicating chamber is connected with a second metal connecting tube, one end of the second metal connecting tube extends into the communicating chamber, and the other end of the second metal connecting tube extends into the communicating chamber. According to the skin expander, the connecting pipe of the skin expander can be lengthened, the butt joint position after lengthening is smooth, the skin expander can enter a wound, the butt joint position is connected firmly, the connecting effect is guaranteed, the one-way valve assembly is arranged, and therefore the connecting pipe can be conveniently and rapidly lengthened. And liquid backflow is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of skin expanders, and specifically refers to a skin expander extension tube. Background Art

[0002] As an advanced treatment method unique to plastic surgery, the principle of skin soft tissue expansion is to implant a skin soft tissue expander under normal skin soft tissue near the lesion. By intermittently injecting liquid into the expansion sac to increase the capacity of the expander, it generates pressure on the surface skin soft tissue. Through the action of the expansion mechanism on the local area, the division and proliferation of tissue and epidermal cells and the widening of cell gaps are achieved, thereby increasing the skin area. After removing the expansion sac, the newly increased skin soft tissue can be used for tissue repair and organ reconstruction.

[0003] The skin expanders clinically used mainly consist of three parts: an expansion sac, an injection port, and a connecting tube. The expansion sac is the main body of the expander. The expansion sac is placed subcutaneously through an incision in the skin, and liquid is injected into the expansion sac through the injection port to make it expand. In the prior art, the length of the connecting tube is very short. When taking skin from a large area, during the expansion process of the expansion sac, as the expansion sac and the separated skin area increase, the connecting tube retracts into the subcutaneous position, and the exposed length gradually shortens, which will affect normal use. Currently, in clinical practice, when encountering this situation, an anesthetic extension tube is often used to dock with the connecting tube and sutured through surgical sutures. However, the sealing effect at the suture is not good, it is easy to leak, and the docking head near the expansion sac will retract to the subcutaneous position, and the docking part is relatively rough and easy to rub the wound. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a skin expander extension tube.

[0005] The utility model is realized through the following technical solutions. A skin expander extension tube is provided, which includes a flexible tube body. One end inner wall of the flexible tube body is fixedly connected with a first metal connecting tube. The other end of the flexible tube body is communicated with a communication chamber. A second metal connecting tube is connected to the communication chamber, and one end of the second metal connecting tube extends into the communication chamber. A one-way cap and a spring for pressing the one-way cap against the end of the second metal connecting tube are arranged in the communication chamber.

[0006] When the connecting tube of the skin expander needs to be lengthened, the connecting tube is cut off. The first metal connecting tube is heated and inserted into the connecting tube connected to the expansion sac, and the second metal connecting tube is heated and inserted into the connecting tube connected to the injection port, thereby realizing the lengthening operation. Liquid is injected into the expansion sac through the injection port. When injecting, the liquid pushes open the one-way cap pressed against the end of the second metal connecting tube. After the injection is completed, the one-way cap is pressed by the spring to play the role of a one-way valve to prevent backflow.

[0007] As an optimization, a counterbore adapted to the end of the second metal connecting pipe is provided on one side of the one-way cap close to the second metal connecting pipe. By covering the end of the second metal connecting pipe with the counterbore, the positioning effect and the sealing effect are improved.

[0008] As an optimization, the counterbore is frustum-shaped. Thus, it is convenient for guiding, and the bottom of the counterbore fits with the end of the second metal connecting pipe.

[0009] As an optimization, an annular convex edge is provided on the outer ring of the one-way cap, and one end of the spring abuts against the convex edge. The connection of the spring is realized through the convex edge.

[0010] As an optimization, the communication chamber is a closed cylinder, and the flexible pipe body and the second metal connecting pipe are respectively connected to both ends of the communication chamber. Thus, the liquid flows in a straight line.

[0011] As an optimization, annular spiked protrusions are provided on the outer rings of both the first metal connecting pipe and the second metal connecting pipe. The spiked protrusions prevent the connection from loosening, and are melt-connected to the connecting pipe after the metal is heated, and the connection effect is better.

[0012] As an optimization, the outer diameter of the flexible pipe body is equal to the outer diameter of the connecting pipe of the skin expander. Thus, the outer diameters of the docking positions are kept consistent, and the docking position is smooth so that it can enter the wound.

[0013] The beneficial effects of the present utility model are as follows: An extension tube for a skin expander of the present utility model can extend the connecting pipe of the skin expander, and the extended docking position is smooth and can enter the wound. The docking position is firmly connected to ensure the connection effect, and a one-way valve assembly is provided to prevent liquid backflow. Description of the Drawings

[0014] Figure 1 It is a schematic cross-sectional view of the present utility model;

[0015] Figure 2 It is a cross-sectional view of the one-way cap of the present utility model;

[0016] Figure 3 It is a diagram of the use state of the present utility model;

[0017] As shown in the figure:

[0018] 1. Flexible pipe body, 2. First metal connecting pipe, 3. Second metal connecting pipe, 4. Communication chamber, 5. One-way cap, 51. Counterbore, 52. Convex edge, 6. Spring, 7. Connecting pipe, 8. Injection pot, 9. Expansion sac. Detailed Embodiments

[0019] To clearly illustrate the technical features of this solution, the following elaborates on this solution through specific embodiments.

[0020] As Figures 1 to 3 shown, a skin expander extension tube of the present utility model includes a flexible tube body 1, and the flexible tube body 1 is made of PVC, TPU or silica gel. The outer diameter of the flexible tube body 1 is equal to the outer diameter of the connecting tube 7 of the skin expander, so that the outer diameters are the same after docking, facilitating the interface to enter the wound.

[0021] One end inner wall of the flexible tube body 1 is fixedly connected with a first metal connecting tube 2. One end of the first metal connecting tube 2 is inserted into the flexible tube body 1 and coaxially arranged. The outer diameter of the first metal connecting tube 2 is the same as the inner diameter of the flexible tube body 1, and the length of the exposed part is 5 - 12 mm. The first metal connecting tube 2 is made of a stainless steel tube and is connected to the flexible tube body 1 by gluing or hot melting. The exposed part can be inserted into the connecting tube 7 after heating, thus realizing hot melting connection and preventing loosening after connection.

[0022] An annular spike protrusion is provided on the outer ring of the first metal connecting tube 2, and multiple circles of spike protrusions are provided to prevent loosening at the connection.

[0023] The other end of the flexible tube body 1 is communicated with a communication chamber 4. The communication chamber 4 is a closed cylinder, the inner cavity is a cylinder, and the inner cavity diameter is larger than the outer diameter of the flexible tube body 1. The communication chamber 4 and the flexible tube body 1 are made of the same material.

[0024] A second metal connecting tube 3 is connected to the communication chamber 4 and one end of the second metal connecting tube 3 extends into the communication chamber 4. In this embodiment, the flexible tube body 1 and the second metal connecting tube 3 are respectively connected to both ends of the communication chamber 4 and coaxially arranged. The second metal connecting tube 3 and the first metal connecting tube 2 have the same pipe diameter and material, and an annular spike protrusion is also provided on the outer ring of the second metal connecting tube 3.

[0025] A one - way cap 5 and a spring 6 for pressing the one - way cap 5 against the end of the second metal connecting tube 3 are provided in the communication chamber 4. One end of the spring 6 abuts against one end of the communication chamber 4 close to the flexible tube body 1, and an annular convex edge 52 is provided on the outer ring of the one - way cap 5. The other end of the spring 6 abuts against the convex edge 52.

[0026] A counterbore 51 adapted to the end of the second metal connecting tube 3 is provided on the side of the one - way cap 5 close to the second metal connecting tube 3. The counterbore 51 is frustum - shaped, that is, the bottom diameter of the counterbore 51 is smaller than the orifice diameter.

[0027] The usage method of the present utility model:

[0028] When the connecting tube 7 of the skin expander needs to be lengthened, the connecting tube 7 is cut off, and the first metal connecting tube 2 is heated and then inserted into the connecting tube 7 connected to the expansion capsule 9, so that the outer diameters of the docking positions are consistent. The docking position is smooth and can thus enter the wound.

[0029] After heating the second metal connecting pipe 3, insert it onto the connecting pipe 7 connected to the injection pot 8, thereby realizing the lengthening operation. Inject liquid into the expansion bladder 9 through the injection pot 8. When injecting, the liquid pushes open the one-way cap 5 pressed against the end of the second metal connecting pipe 3. After the injection is completed, the one-way cap 5 is pressed tightly by the spring, acting as a one-way valve.

[0030] Certainly, the above description is not limited to the above examples. The technical features not described in this utility model can be realized by or adopted from the prior art, and will not be elaborated here. The above embodiments and the accompanying drawings are only used to illustrate the technical solution of this utility model and are not intended to limit this utility model. The preferred embodiments are described in detail with reference to this utility model. Those of ordinary skill in the art should understand that any changes, modifications, additions, or substitutions made by those of ordinary skill in this technical field within the substantial scope of this utility model do not depart from the purpose of this utility model and should also fall within the scope of the claims of this utility model.

Claims

1. A skin expander extension tube, characterized in that: It includes a flexible tube body (1). One end inner wall of the flexible tube body (1) is fixedly connected with a first metal connecting tube (2). The other end of the flexible tube body (1) communicates with a communicating chamber (4). A second metal connecting tube (3) is connected to the communicating chamber (4), and one end of the second metal connecting tube (3) extends into the communicating chamber (4). A one-way cap (5) and a spring (6) for pressing the one-way cap (5) against the end of the second metal connecting tube (3) are provided in the communicating chamber (4).

2. The skin expander extension tube according to claim 1, characterized in that: A counterbore (51) adapted to the end of the second metal connecting tube (3) is provided on one side of the one-way cap (5) close to and facing the second metal connecting tube (3).

3. The skin expander extension tube according to claim 2, characterized in that: The counterbore (51) is frustum-shaped.

4. A skin expander extension tube according to claim 1, characterized in that: An annular convex edge (52) is provided on the outer ring of the one-way cap (5), and one end of the spring (6) abuts against the convex edge (52).

5. A skin expander extension tube according to claim 1, characterized in that: The communicating chamber (4) is a closed cylinder, and the flexible tube body (1) and the second metal connecting tube (3) are respectively connected to both ends of the communicating chamber (4).

6. A skin expander extension tube according to claim 1, characterized in that: Annular spiky protrusions are provided on the outer rings of both the first metal connecting tube (2) and the second metal connecting tube (3).

7. A skin expander extension tube according to claim 1, characterized in that: The outer diameter of the flexible tube body (1) is equal to the outer diameter of the connecting tube (7) of the skin expander.

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