Fixed-bottom skin soft tissue expander

Abstract

The utility model relates to a fixed-bottom skin soft tissue expander. The device comprises an expansion bag, a catheter and an injection pot, a non-expansion base is arranged at the bottom of the expansion bag, a non-expansion pot wall is arranged on the periphery of the non-expansion base upwards, and the lower end of the expansion bag is connected to the inner side of the non-expansion pot wall; the outer side face and the inner side face of the non-expansion pot wall intersect at the top to form the pot wall with the thin upper portion and the thick lower portion. One end of the catheter is fixed to the bottom of the non-expansion base and communicated with the interior of the expansion bag, and the other end of the catheter is connected with the injection pot. The two sides or the periphery of the non-expansion base are provided with fixing plates which extend outwards and are provided with fixing holes. Through the non-expansion base and the non-expansion basin wall, the bottom of the expansion bag cannot be enlarged along with the expansion bag in the expansion process, and distortion and compression on body surface organs of a patient are avoided.

Description

Technical Field

[0001] The utility model relates to a skin soft tissue expander, in particular to a fixed-bottom skin soft tissue expander. Background Art

[0002] Traditional skin expanders consist of an expandable expansion sac, an injection pot, and a catheter. The medium, usually saline, is injected into the expansion sac through the injection pot to expand it and achieve the purpose of increasing the skin. Traditional skin soft tissue expanders will expand evenly in all directions. When used in softer parts such as the neck and abdomen, they will expand deep into the body while expanding toward the surface, which can easily compress deep organs and reduce the efficiency of expansion. To solve this problem, directional expanders have emerged. Directional expanders can make the bottom force more even by thickening the bottom or sticking a thickened bottom plate, which also prevents the expansion sac from expanding deep into the surface, thereby reducing the pressure on deep organs and improving the efficiency of expansion.

[0003] However, whether it is a traditional expander or a new directional expander, the base surface in contact with the body will increase synchronously when the expansion capsule expands. The expanded base surface still needs to be covered by the skin when the expander is removed, thereby reducing the effective expansion area of ​​the skin used to repair the wound. In addition, since the base surface expands synchronously when the expansion capsule expands, it is very easy to cause distortion and compression of the surface organs when used near the eyes, lips and other parts. Summary of the invention

[0004] The utility model aims to overcome the defects in the prior art and provide a fixed-bottom skin soft tissue expander which can keep the bottom area unchanged while the expansion bag is expanded, thereby increasing the effective expansion area and reducing the distortion and compression of surrounding organ tissues.

[0005] The utility model is implemented as follows: a fixed-bottom skin soft tissue expander comprises an expansion bag, a catheter and an injection pot, a non-expanding base is arranged at the bottom of the expansion bag, a non-expanding basin wall is arranged upwardly around the non-expanding basin, and the lower end of the expansion bag is connected to the inner side of the non-expanding basin wall; the height of the non-expanding basin wall is 2 mm to 20 mm; the outer side surface and the inner side surface of the non-expanding basin wall intersect at the top to form a basin wall which is thin at the top and thick at the bottom; one end of the catheter is fixed to the bottom of the non-expanding base and communicated with the inside of the expansion bag, and the other end of the catheter is connected to the injection pot; fixing plates with fixing holes extending outward are arranged on both sides or around the non-expanding base.

[0006] The non-expandable base is selected from a silicone rubber base, a polyester base or a resin base.

[0007] According to the fixed-bottom skin soft tissue expander of claim 1, the feature is that the non-expandable basin wall is any one of a silicone rubber basin wall, a polyester basin wall or a resin basin wall.

[0008] The thickness of the lower end of the non-expanded basin wall is 0.2 mm to 2 mm.

[0009] In the longitudinal section of the non-expanded basin wall, an angle between a line connecting the upper and lower vertices of the outer surface and a plane where the top surface of the non-expanded base is located is 30 to 105 degrees.

[0010] In the longitudinal section of the non-expanded basin wall, the angle between the line between the upper and lower vertices of the inner side surface and the plane where the top surface of the non-expanded base is located is 90 to 150 degrees.

[0011] The outer side surface and the inner side surface of the non-expanded basin wall are respectively plane surfaces or arc-shaped surfaces.

[0012] The top surface of the non-expanded base corresponding to the bottom of the expansion sac is a combination of any one or more of a circular plane, a rounded semicircular plane, a rounded rectangular plane, an elliptical plane, or a kidney-shaped plane.

[0013] The number of the fixing holes is 2 to 6.

[0014] The beneficial effects of the utility model are as follows: through the non-expanding base and the non-expanding pelvic wall, the bottom of the expansion sac will not increase during the expansion process, thereby avoiding distortion and compression of the patient's surface organs; the utility model can be fixed with screws or sutures through the fixing holes, thereby avoiding movement or overturning of the utility model during the expansion process of the expansion sac. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the internal structure of the utility model.

[0016] Figure 2 It is a structural schematic diagram of an expansion bag, a non-expanding base and a non-expanding pelvic wall of the utility model.

[0017] Figure 3 It is a schematic diagram of the cross-sectional structure of the non-expanding base and the non-expanding basin wall of the utility model.

[0018] Figure 4 yes Figure 3 Schematic diagram of the local enlarged structure of part A.

[0019] Figure 5 It is a schematic diagram of the cross-sectional structure of the non-expanded base and the non-expanded basin wall of the first embodiment of the utility model.

[0020] Figure 6 yes Figure 5Schematic diagram of the local enlarged structure of part B.

[0021] Figure 7 It is a schematic diagram of the cross-sectional structure of the non-expanded base and the non-expanded basin wall of the second embodiment of the utility model.

[0022] Figure 8 It is a schematic diagram of the cross-sectional structure of the non-expanded base and the non-expanded basin wall of the third embodiment of the utility model.

[0023] Among them: 1. dilation bag; 2. catheter; 3. injection pot; 4. non-expanding base; 5. non-expanding pelvic wall; 6. outer side; 7. inner side; 8. fixing hole; 9. fixing plate. DETAILED DESCRIPTION

[0024] according to Figures 1 to 8 The utility model is a fixed-bottom skin soft tissue expander, comprising an expansion capsule 1, a catheter 2 and an injection pot 3. The bottom of the expansion capsule 1 is provided with a non-expanding base 4, and the non-expanding basin wall 5 is provided around the non-expanding base 4, and the lower end of the expansion capsule 1 is connected to the inner side of the non-expanding basin wall 5; the height of the non-expanding basin wall 5 is 2 mm~20 mm, preferably 10 mm; the outer side surface 6 and the inner side surface 7 of the non-expanding basin wall 5 intersect at the top to form a basin wall that is thin on the top and thick on the bottom; the thickness of the lower end of the non-expanding basin wall 5 is 0.2 mm~2 mm, preferably 1 mm. One end of the catheter 2 is fixed to the bottom of the non-expanding base 4 and communicates with the inside of the expansion capsule 1, and the other end of the catheter 2 is connected to the injection pot 3; the two sides or the surroundings of the non-expanding base 4 are provided with a fixing plate 9 with fixing holes 8 extending outward. The number of the fixing holes 8 is 2~6, preferably 4.

[0025] The non-expandable base 4 is selected from a silicone rubber base, a polyester base or a resin base. The non-expandable basin wall is selected from a silicone rubber basin wall, a polyester basin wall or a resin wall. The top surface of the non-expandable base 4 corresponding to the bottom of the expansion capsule 1 is a combination of any one or more of a circular plane, a rounded semicircular plane, a rounded rectangular plane, an elliptical plane, or a kidney-shaped plane.

[0026] In the longitudinal section of the non-expanding basin wall 5, the angle a between the line between the upper and lower vertices of the outer side surface 6 and the plane where the top surface of the non-expanding base 4 is located is 30 to 105 degrees, preferably 90 degrees. In the longitudinal section of the non-expanding basin wall 5, the angle b between the line between the upper and lower vertices of the inner side surface 7 and the plane where the top surface of the non-expanding base 4 is located is 90 to 150 degrees, preferably 105 degrees. The outer side surface 6 and the inner side surface 7 of the non-expanding basin wall 5 are respectively planes or arcuate surfaces.

[0027] The present invention will be further described below with regard to specific embodiments. Embodiment 1:

[0028] according to Figure 5 , Figure 6 , combined with Figure 1 , Figure 2 In this embodiment, the outer side surface 6 of the non-expandable pelvic wall 5 is a plane, and the inner side surface 7 is an arc-shaped surface. In the longitudinal section of the non-expandable pelvic wall 5, the angle b between the line between the upper and lower vertices of the inner side surface 7 and the plane where the top surface of the non-expandable base 4 is located is 105 degrees, and the remaining structures are as described above. In this embodiment, when the expansion capsule is expanded, the inner side surface 7 of the arc-shaped surface can better fit the expansion capsule 1 and allow the part of the expansion capsule above the pelvic wall to expand in all directions, which can provide more expanded skin and is suitable for parts with relatively small bottom areas. Embodiment 2:

[0029] according to Figure 7 , combined with Figure 1 , Figure 2 The outer side surface 6 and the inner side surface 7 of the non-expandable basin wall 5 of this embodiment are both planes, and the angle b between the inner side surface 7 and the plane where the top surface of the non-expandable base 4 is located on the longitudinal section of the non-expandable basin wall 5 is 95 degrees, and the remaining structures are as described above. The outer side surface 6 and the inner side surface 7 of this embodiment are both planes, and compared with the expansion bag 1 implemented in the first embodiment, the expansion range to the surroundings is limited and the expansion is mainly upward, which is suitable for most parts. Embodiment three:

[0030] according to Figure 8 , combined with Figure 1 , Figure 2 The outer side surface 6 and the inner side surface 7 of the non-expanded pelvic wall 5 of this embodiment are both arc-shaped surfaces, and the remaining structures are as described above. Compared with the expansion capsule 1 implemented in the first embodiment, the expanded shape is flatter and more rounded, the outer side surface 6 is an arc-shaped surface, the pelvic wall is retracted, and the expansion capsule is limited to expand only upwards, not to expand around, which is suitable for parts with a large bottom area.

Claims

1. A fixed-bottom skin soft tissue expander, comprising an expansion bag, a catheter and an injection pot, characterized in that: A non-expanding base is provided at the bottom of the expansion sac, and non-expanding basin walls are provided around the non-expanding base, and the lower end of the expansion sac is connected to the inner side of the non-expanding basin wall; the height of the non-expanding basin wall is 2mm~20mm; the outer side surface and the inner side surface of the non-expanding basin wall intersect at the top to form a basin wall that is thin on the top and thick on the bottom; one end of the catheter is fixed to the bottom of the non-expanding base and connected to the inside of the expansion sac, and the other end of the catheter is connected to the injection pot; fixing plates with fixing holes extending outward are provided on both sides or around the non-expanding base.

2. The fixed-bottom skin soft tissue expander according to claim 1, characterized in that: The non-expandable base is selected from a silicone rubber base, a polyester base or a resin base.

3. The fixed-bottom skin soft tissue expander according to claim 1, characterized in that: The non-expanding basin wall is selected from silicone rubber basin wall, polyester basin wall or resin basin wall.

4. A fixed-bottom skin soft tissue expander according to claim 1 or 3, characterized in that: The thickness of the lower end of the non-expanded basin wall is 0.2 mm to 2 mm.

5. The fixed-bottom skin soft tissue expander according to claim 4, characterized in that: In the longitudinal section of the non-expanded basin wall, an angle between a line connecting the upper and lower vertices of the outer surface and a plane where the top surface of the non-expanded base is located is 30 to 105 degrees.

6. The fixed-bottom skin soft tissue expander according to claim 4, characterized in that: In the longitudinal section of the non-expanded basin wall, the angle between the line between the upper and lower vertices of the inner side surface and the plane where the top surface of the non-expanded base is located is 90 to 150 degrees.

7. The fixed-bottom skin soft tissue expander according to claim 4, characterized in that: The outer side surface and the inner side surface of the non-expanded basin wall are respectively plane surfaces or arc-shaped surfaces.

8. The fixed-bottom skin soft tissue expander according to claim 1, characterized in that: The top surface of the non-expanded base corresponding to the bottom of the expansion sac is a combination of any one or more of a circular plane, a rounded semicircular plane, a rounded rectangular plane, an elliptical plane, or a kidney-shaped plane.

9. The fixed-bottom skin soft tissue expander according to claim 1, characterized in that: The number of the fixing holes is 2 to 6.

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