Dilator and breast reconstruction device adopting same

Abstract

The utility model provides a dilator which comprises a flexible dilation bag capable of being expanded along with the increase of fluid amount in a cavity of the dilation bag. The guide tube is connected to the opening of the expansion bag and is communicated with the opening of the expansion bag; the injection valve is connected to one end, opposite to the expansion bag, of the guide tube, is communicated and is used for introducing fluid; the injection valve is provided with an injection port which is provided with a first one-way valve, and the first one-way valve is in one-way communication from outside to inside. When liquid is supplemented into the expansion bag through the injection port to expand the expansion bag, the first one-way valve is arranged, so that the liquid can be prevented from leaking from the injection port, and the conditions that after liquid leakage, the expansion bag contracts and then expands, the expansion bag cannot be completely matched with the skin soft tissue in shape, dislocation is caused, and the skin soft tissue is pressed unevenly are avoided; the use safety of the dilator is improved; and moreover, the liquid enters from the injection port in a one-way manner, so that the controllability of the liquid injection amount is ensured, and the accuracy of the liquid injection amount is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a dilator. Background Art

[0002] Breast cancer is the most common malignant tumor in female patients. The psychological discomfort of patients is usually caused by the loss of breast shape after surgery, so breast reconstruction is a very important step after breast cancer surgery. At present, the common technology of breast reconstruction is the pre-expansion technology of skin flap combined with fat transplantation technology, which implants the expander under the skin and then performs fat transplantation.

[0003] Since the shape of the expansion sac of the expander needs to match the shape of the skin soft tissue to ensure that the skin soft tissue is evenly compressed, the existing expander uses a single channel to replenish liquid. When replenishing the liquid, it may cause the liquid in the expander to leak, and the liquid leakage will cause the expansion sac to shrink. Even if the liquid is replenished again, it cannot be guaranteed that the shape of the expanded expansion sac can completely match the shape of the skin soft tissue. If misalignment occurs, it may cause uneven pressure on the skin soft tissue, distal necrosis of the skin flap, infection and other adverse conditions. On the other hand, after the liquid leaks, the injection volume cannot be controlled, which is not conducive to the precise control of the expander injection. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of the present utility model is to provide an expander to solve the problems in the prior art that the expander is prone to leakage when replenishing liquid, the expansion bag cannot be guaranteed to completely match the shape of the skin soft tissue when it shrinks and then expands, if misalignment occurs, it may cause uneven pressure, and the injection amount cannot be controlled.

[0005] In order to achieve the above-mentioned purpose and other related purposes, the utility model provides a dilator, comprising:

[0006] The dilatation sac is a flexible sac that expands as the amount of fluid in its cavity increases;

[0007] A guide tube connected to the opening of the dilation sac and conducting;

[0008] An injection valve connected to the end of the guide tube facing away from the dilation bag and connected to introduce fluid;

[0009] The injection valve has an injection port, and the injection port is provided with a first one-way valve, and the direction of the first one-way valve is from outside to inside to form a one-way connection.

[0010] In order to better realize the utility model, further optimization is made in the above structure, the injection valve is a cavity structure, the first one-way valve is located on the side of the injection valve facing away from the guide tube, and a closable pressure relief port is also provided in the injection valve.

[0011] In order to better realize the utility model, further optimization is made in the above structure, and a cap is detachably connected to the pressure relief port, and the cap is sealed with the pressure relief port to close the pressure relief port.

[0012] In order to better realize the utility model, further optimization is made in the above structure, and a second one-way valve is arranged at the balance port, and the direction of the second one-way valve is from inside to outside to form a one-way connection.

[0013] In order to better implement the utility model, further optimization is made in the above structure, the first one-way valve and the second one-way valve are respectively located on different sides of the injection valve, and the second one-way valve has the same structure as the first one-way valve and is in opposite direction.

[0014] In order to better realize the utility model, further optimization is made in the above structure, the first one-way valve includes: a first flow channel, a first flow channel arranged on the outer wall side of the injection valve, a second flow channel, arranged on the inner wall side of the injection valve cavity, the second flow channel is connected to the first flow channel to form a fluid channel; a sealing step, arranged on the inner side of the first flow channel; a sealing ball, arranged on the inner side of the sealing step, the inner side of the sealing ball is connected to a spring to abut and cooperate with the sealing step to achieve sealing, and when the sealing ball is pushed by the fluid from the outside to the inside, the spring is compressed to open the first flow channel.

[0015] In order to better realize the utility model, further optimization is made in the above structure, and the expansion bag, guide tube and injection valve are integrally formed by 3D printing.

[0016] In order to better realize the utility model, further optimization is made in the above structure, and the expansion bag, the guide tube and the injection valve are made of organic silicon elastomer material.

[0017] In order to better realize the utility model, further optimization is made in the above structure, and the outer side wall surface of the expansion sac has a contoured portion that matches the shape of the inner wall of the chest cavity.

[0018] The utility model also provides a breast reconstruction device, comprising an expander as described in the above technical solution.

[0019] As described above, the expander of the utility model has the following beneficial effects:

[0020] 1. When liquid is added into the expansion bag through the injection port to expand the expansion bag, a first one-way valve is provided to prevent liquid from leaking from the injection port, thereby preventing the expansion bag from contracting and then expanding after liquid leakage and failing to completely match the shape of the skin soft tissue, causing dislocation and uneven pressure on the skin soft tissue, thereby improving the safety of the expander when in use;

[0021] 2. The liquid enters the injection port in one direction, which ensures the controllability of the injection volume and improves the accuracy of the injection volume;

[0022] 3. In order to prevent the expansion sac from being heated and expanding, which may cause excessive pressure on the skin and soft tissue, a pressure relief port is provided to manually reduce the pressure in the expansion sac, and a second one-way valve is provided to prevent external impurities from entering the expansion sac, thereby ensuring the purity of the liquid in the expansion sac;

[0023] 4. 3D printing technology is used to make the outer surface shape of the expansion bag better match the shape of the inner wall of the chest cavity, so as to better fit the inner wall of the chest cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 Shown is a schematic structural diagram of a dilator disclosed in Example 1 of the utility model.

[0026] Figure 2 Display as Figure 1 Enlarged view of point A.

[0027] Description of Reference Numerals

[0028] 1. dilation bag; 2. guide tube; 3. injection valve; 4. injection port; 5. first one-way valve; 51. first flow channel; 52. second flow channel; 53. fluid channel; 54. sealing step; 55. sealing ball; 56. spring; 6. pressure relief port; 7. cap; 8. second one-way valve. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0030] In the description of the present utility model, it should be noted that, unless otherwise specified, "multiple" means two or more; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0031] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0032] Embodiment 1:

[0033] See also Figure 1-Figure 2 The utility model provides a dilator, comprising:

[0034] The expansion sac 1 is flexible and can expand as the amount of fluid in its cavity increases;

[0035] A guide tube 2 connected to the opening of the dilatation sac 1 and conducting;

[0036] An injection valve 3 connected to the end of the guide tube 2 facing away from the dilation bag 1 and connected to introduce fluid;

[0037] The injection valve 3 has an injection port 4, and the injection port 4 is provided with a first one-way valve 5, and the first one-way valve 5 is directed from outside to inside to form a one-way connection.

[0038] Specifically, the injection valve 3 is a hollow structure, the first one-way valve 5 is located on the side of the injection valve 3 facing away from the guide tube 2 , and a closable pressure relief port 6 is also provided in the injection valve 3 .

[0039] More specifically, a cap 7 is detachably connected to the pressure relief port 6 , and the cap 7 is sealingly matched with the pressure relief port 6 to close the pressure relief port 6 .

[0040] In addition, a second one-way valve 8 is provided at the balance port, and the direction of the second one-way valve 8 is from inside to outside to form a one-way connection.

[0041] It should be noted that the first one-way valve 5 and the second one-way valve 8 are located at different sides of the injection valve 3 , respectively, and the second one-way valve 8 has the same structure as the first one-way valve 5 but is in opposite directions.

[0042] Specifically, the first one-way valve 5 includes: a first flow channel 51, which is arranged on the outer wall side of the injection valve 3, and a second flow channel 52, which is arranged on the inner wall side of the injection valve 3 cavity. The second flow channel 52 is connected to the first flow channel 51 to form a fluid channel 53; a sealing step 54, which is arranged on the inner side of the first flow channel 51; a sealing ball 55, which is arranged on the inner side of the sealing step 54. The inner side of the sealing ball 55 is connected to a spring 56 to abut against the sealing step 54 to achieve sealing. When the sealing ball 55 is pushed by the fluid from the outside to the inside, the spring 56 is compressed to open the first flow channel 51.

[0043] Specifically, the dilatation bag 1, the guide tube 2, and the injection valve 3 are integrally formed by 3D printing.

[0044] More specifically, the dilatation bag 1, the guide tube 2 and the injection valve 3 are made of organic silicon elastomer material.

[0045] It should be noted that the outer wall surface of the expansion bladder 1 has a contoured portion that matches the shape of the inner wall of the chest cavity.

[0046] The working principle of the expander of the utility model is: when liquid is added into the expansion bag 1 through the injection port 4 to expand the expansion bag 1, a first one-way valve 5 is provided to prevent the liquid from leaking from the injection port 4, thereby preventing the expansion bag 1 from contracting and then expanding after liquid leakage and failing to completely match the shape of the skin soft tissue, causing dislocation and uneven pressure on the skin soft tissue, thereby improving the safety of the expander when in use.

[0047] Embodiment 2:

[0048] The utility model provides a breast reconstruction device, comprising an expander as described in embodiment 1.

[0049] In summary, the utility model effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

[0050] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A dilator, comprising: The dilatation sac (1) is flexible and can expand as the amount of fluid in its cavity increases; A guide tube (2) connected to the opening of the dilation bag (1) and conducting; An injection valve (3) connected to the end of the guide tube (2) facing away from the expansion bag (1) and connected to the guide tube (2) for introducing fluid; The invention is characterized in that the injection valve (3) has an injection port (4), and the injection port (4) is provided with a first one-way valve (5), and the first one-way valve (5) is oriented from outside to inside to form a one-way connection.

2. A dilator according to claim 1, characterized in that: The injection valve (3) is of a hollow structure, the first one-way valve (5) is located on the side of the injection valve (3) facing away from the guide tube (2), and a closable pressure relief port (6) is also provided in the injection valve (3).

3. A dilator according to claim 2, characterized in that: A cap (7) is detachably connected to the pressure relief port (6), and the cap (7) is sealingly matched with the pressure relief port (6) to close the pressure relief port (6).

4. A dilator according to claim 2, characterized in that: A second one-way valve (8) is arranged at the balance port, and the direction of the second one-way valve (8) is from inside to outside to form a one-way connection.

5. A dilator according to claim 4, characterized in that: The first one-way valve (5) and the second one-way valve (8) are respectively located on different sides of the injection valve (3); the second one-way valve (8) has the same structure as the first one-way valve (5) but has an opposite direction.

6. A dilator according to claim 5, characterized in that: The first one-way valve (5) comprises: a first flow channel (51), the first flow channel (51) being arranged on the outer wall side of the injection valve (3), a second flow channel (52), being arranged on the inner wall side of the injection valve (3) cavity, the second flow channel (52) being connected to the first flow channel (51) to form a fluid channel (53); a sealing step (54), being arranged on the inner side of the first flow channel (51); and a sealing ball (55), being arranged on the inner side of the sealing step (54), the inner side of the sealing ball (55) being connected to a spring (56) to abut against the sealing step (54) to achieve sealing, and when the sealing ball (55) is pushed by fluid from the outside to the inside, the spring (56) is compressed to open the first flow channel (51).

7. A dilator according to any one of claims 1 to 6, characterized in that: The dilatation bag (1), the guide tube (2), and the injection valve (3) are integrally formed by 3D printing.

8. A dilator according to claim 7, characterized in that: The expansion bag (1), the guide tube (2) and the injection valve (3) are made of organic silicon elastomer material.

9. A dilator according to claim 7, characterized in that: The outer wall surface of the expansion bag (1) has a contoured portion that matches the shape of the inner wall of the chest cavity.

10. A breast reconstruction device, characterized in that: Comprising a dilator as claimed in any one of claims 1-9.

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