Skin expander

Abstract

A skin expander comprises a balloon, a catheter comprising a first end and a second end, the balloon being disposed on the catheter and close to the first end, the catheter comprising an inner tube and an outer tube, the outer tube being sleeved outside the inner tube, the outer tube being in communication with the balloon, a guide needle being adapted to be inserted into the inner tube from the second end and extending along the inner tube to the first end, a syringe (not shown) being in communication with the outer tube, the syringe being used for injecting liquid into the balloon through the outer tube. The skin expander provided by the embodiment of the utility model is suitable for skin expansion of small parts such as fingers, and the operation of implanting the balloon under the skin is simpler and more convenient.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a skin expander. Background Technology

[0002] Soft tissue defects are a common challenge in reconstructive surgery, and soft tissue expansion techniques can overcome these difficulties. Currently, soft tissue expansion is a widely used reconstructive technique. The soft tissue expanders used can induce skin or tissue expansion under stress or given deformation conditions. Clinically, it is applied to larger areas such as the head and neck, limbs, and breasts. However, skin defects in the fingers are also relatively common clinically, so expanders are also being used for the expansion of smaller parts such as the fingers.

[0003] However, there are still some problems with skin expanders currently used on small parts such as fingers. Utility Model Content

[0004] The technical problem solved by this invention is to provide a skin expander for use in small areas such as fingers, which allows the expander to be implanted into the skin more smoothly.

[0005] To address the aforementioned technical problems, this utility model provides a skin expander, comprising: a balloon; a catheter including a first end and a second end, the balloon being disposed on the catheter and close to the first end, the catheter including an inner tube and an outer tube, the outer tube being sleeved outside the inner tube and communicating with the balloon; a guide needle adapted to be inserted into the inner tube from the second end and extending along the inner tube to the first end; and a syringe communicating with the outer tube, the syringe being used to inject liquid into the balloon through the outer tube.

[0006] Optionally, it also includes an injection port, which is disposed on the catheter, and the syringe communicates with the outer tube through the injection port.

[0007] Optionally, a one-way valve may also be included, which is disposed on the injection port.

[0008] Optionally, the one-way valve includes: a housing, wherein a valve cavity is provided within the housing, the valve cavity including an inlet end and an outlet end; a valve core, wherein the valve core is disposed within the valve cavity, the valve core including an abutment portion, the abutment portion being adapted to block or open the inlet end of the valve cavity under the action of external force; and an elastic element, wherein the elastic element is sleeved on the valve core, one end of the elastic element abutting against the abutment portion, and the other end of the elastic element abutting against the outlet end of the valve cavity.

[0009] Optionally, the syringe includes an injection end for pushing the valve core, causing the valve core to move along the axial direction of the valve cavity to open the inlet end of the valve cavity.

[0010] Optionally, when the abutment portion blocks the inlet end, the elastic element has a first compression amount; when the abutment portion opens the inlet end, the elastic element has a second compression amount, the second compression amount being greater than the first compression amount.

[0011] Optionally, the elastic element includes a spring.

[0012] Optionally, a pressure sensor may also be included, which is disposed on the inner wall of the injection port.

[0013] Optionally, a display may also be included, with the pressure sensor wirelessly or wiredly connected to the display.

[0014] Optionally, the balloon may be made of silicone.

[0015] Compared with the prior art, the technical solution of this utility model embodiment has the following beneficial effects:

[0016] The skin expander provided by this technical solution involves implanting a balloon under the skin. By expanding the balloon, excess loose skin is obtained. On one hand, the balloon is connected to the outer tube of the catheter. The syringe injects liquid into the balloon through the outer tube to expand the balloon, thereby expanding the skin with the balloon implanted. On the other hand, the guide needle is inserted from the second end of the catheter into the inner tube and then extends along the inner tube towards the first end. The extension of the guide needle can help the balloon reach the implantation point under the skin smoothly. Moreover, the first end of the catheter protrudes from the balloon, which is beneficial for the catheter to be implanted into the skin through a small incision at the beginning.

[0017] Furthermore, it also includes a one-way valve disposed on the injection port. With the one-way valve at the injection port, the path between the syringe and the balloon is unidirectional, allowing liquid in the syringe to flow unidirectionally into the balloon and preventing liquid in the balloon from flowing out.

[0018] Furthermore, it also includes a pressure sensor disposed on the inner wall of the injection port. The pressure sensor monitors the pressure inside the injection port, which is connected to the balloon, thereby allowing monitoring of the balloon pressure to adjust the amount of injected liquid according to the balloon pressure. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the skin expander in one embodiment of the present invention;

[0020] Figure 2 This is an exploded structural diagram of the skin expander in one embodiment of the present invention;

[0021] Figure 3 This is a cross-sectional structural diagram of a skin expander in one embodiment of this utility model;

[0022] Figure 4 This is an exploded view of the one-way valve in one embodiment of the present invention;

[0023] Figure 5 This is a cross-sectional structural diagram of a one-way valve in one embodiment of this utility model. Detailed Implementation

[0024] As described in the background section, current skin expanders used in small areas such as fingers still have certain problems. Specifically, it is difficult to enter the skin of small areas such as fingers through puncture holes, and it is difficult to deliver the balloon to the target implantation site.

[0025] To address the aforementioned problems, this utility model provides a skin expander, comprising a balloon, a catheter, a guide needle, and a syringe. The balloon is positioned on the catheter and close to its first end, with the first end protruding beyond the balloon. The first end of the catheter facilitates smooth insertion into the skin through a small incision. The guide needle, extending within the inner tube, guides the balloon to the target implantation site, making subcutaneous balloon insertion more convenient and suitable for clinical operation. Furthermore, the balloon is connected to an outer tube; the syringe injects liquid into the balloon through the outer tube to inflate it, thereby expanding the skin with the balloon implanted to obtain excess skin.

[0026] To make the above-mentioned objectives, features and beneficial effects of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0027] Figure 1 This is a schematic diagram of the overall structure of the skin expander in one embodiment of the present invention; Figure 2 This is an exploded structural diagram of the skin expander in one embodiment of the present invention; Figure 3 This is a cross-sectional structural diagram of a skin expander in one embodiment of this utility model; Figure 4 This is an exploded view of the one-way valve in one embodiment of the present invention; Figure 5 This is a cross-sectional structural diagram of a one-way valve in one embodiment of this utility model.

[0028] Reference Figures 1 to 3The skin expander 1 includes: a balloon 10; a catheter 20, the catheter including a first end 21 and a second end 22, the balloon 10 being disposed on the catheter and close to the first end 21, the catheter 20 including an inner tube 31 and an outer tube 32, the outer tube 32 being sleeved outside the inner tube 31 and communicating with the balloon 10; a guide needle 40, the guide needle 40 being adapted to be inserted into the inner tube 31 from the second end 22 and extending along the inner tube 31 to the first end 21; and a syringe (not shown), the syringe being communicating with the outer tube 32, the syringe being used to inject liquid into the balloon 10 through the outer tube 32.

[0029] The balloon 10 is used for implantation in the skin. The syringe is connected to the balloon 10 through the outer tube 32. Liquid is injected into the balloon 10 through the outer tube 32 to expand the balloon 10, thereby expanding the skin in which the balloon 10 is implanted to obtain excess skin.

[0030] The fluid injected into balloon 10 via syringe includes physiological saline.

[0031] In this embodiment, the inner tube 31 and the outer tube 32 are not connected, and the liquid inside the balloon 10 will not leak out through the inner tube 31, thus maintaining the pressure of the balloon 10.

[0032] In this embodiment, the balloon 10 is made of rubber. The balloon 10 is implanted under the skin, and the expansion of the balloon 10 achieves skin relaxation and opening. The balloon 10 is made of rubber and has excellent expansion and rebound properties.

[0033] In this embodiment, the inner tube 31 and the outer tube 32 are made of PVC (polyvinyl chloride).

[0034] In this embodiment, the guide needle 40 is made of an alloy. The guide needle 40 has a certain rigidity. When the guide needle 40 extends from the second end 22 to the first end 21 in the inner tube 31, it can maintain a certain rigidity of the catheter 20 and the balloon 10, which facilitates guiding the balloon 10 to the target implantation position.

[0035] In this embodiment, the first end 21 of the catheter 20 protrudes from the balloon 10, which facilitates the catheter 20 to enter the small incision in the skin initially.

[0036] The first end 21 protrudes from the balloon 10 by a length of 3-5 mm. This length is designed to guide the insertion through the initial small incision in the skin, while also preventing excessive length from hindering the implantation of the catheter 20 and balloon 10 within the skin.

[0037] Continue to refer to Figures 1 to 3The skin expander 1 also includes an injection port 50, which is disposed on the catheter 20, and the syringe is connected to the outer tube 32 through the injection port 50.

[0038] In this embodiment, the injection port 50 is located near the second end 22 of the conduit 20.

[0039] In this embodiment, the syringe includes an injection end (not shown), which is connected to the injection port 50.

[0040] The skin expander also includes a one-way valve 60, which is disposed on the injection port 50.

[0041] In this embodiment, the one-way valve 60 connects the injection end of the syringe and the injection port 50. The one-way valve 60 ensures that the connection between the syringe and the injection port 50 is unidirectional, preventing the liquid injected into the balloon 10 from overflowing through the injection port 50.

[0042] Reference Figure 4 and Figure 5 The one-way valve 60 includes: a housing 61, wherein a valve cavity 62 is provided inside the housing 61, the valve cavity 62 including an inlet end 621 and an outlet end 622; a valve core 63, wherein the valve core 63 is disposed in the valve cavity 62, the valve core 63 including an abutment portion 631, the abutment portion 631 being adapted to block or open the inlet end 621 of the valve cavity 62 under the action of external force; and an elastic element 64, wherein the elastic element 64 is sleeved on the valve core 63, one end of the elastic element 64 abutting against the abutment portion 631, and the other end of the elastic element 64 abutting against the outlet end 622 of the valve cavity 62.

[0043] In this embodiment, the injection end is used to push the valve core 63, causing the valve core 63 to move along the axial direction of the valve cavity 62 to open the inlet end 621 of the valve cavity 62.

[0044] Specifically, when it is not necessary to inject liquid into the balloon 10, the valve core 63 is in a state without external force. At this time, the abutment part 631 abuts against the inlet end 621 of the valve cavity 62 to block the inlet end 621. When it is necessary to inject liquid into the balloon 10, the injection end of the syringe pushes the top of the valve core 63, causing the valve core 63 to move towards the outlet end 622 of the valve cavity 62. The abutment part 631 leaves the inlet end 621 to open the inlet end 621, thereby opening the connection passage from the syringe to the injection port 50. The liquid in the syringe can flow into the balloon 10 through the outer tube 32.

[0045] In this embodiment, when the abutting part 631 blocks the inlet end 621, the elastic member 64 has a first compression amount; when the abutting part 631 opens the inlet end 621, the elastic member 64 has a second compression amount, the second compression amount being greater than the first compression amount.

[0046] In this embodiment, the elastic element 64 is a spring, which is installed in the valve cavity 62. The spring is in a state of natural extension or slight compression when no external force is applied. The spring force acts on the abutment portion 631 of the valve core 63, causing the abutment portion 631 to abut against the inlet end 621 of the valve cavity 62 to block the inlet end 621. When the valve core 63 moves towards the outlet end 622 of the valve cavity 62 under the action of external force, it drives the spring to be further compressed, and the compression amount of the spring increases.

[0047] In other embodiments, the elastic element 64 may also be other elastic components capable of compression and rebound.

[0048] Continue to refer to Figures 1 to 3 The skin expander 1 also includes a pressure sensor 70, which is disposed on the inner wall of the injection port 50.

[0049] In this embodiment, the pressure sensor 70 is used to monitor the pressure inside the injection port 50. Since the injection port 50 is connected to the balloon 10, the pressure inside the injection port 50 reflects the pressure of the balloon 10. The pressure sensor 70 can indirectly monitor the pressure of the balloon 10 by monitoring the pressure inside the injection port 50.

[0050] In this embodiment, the pressure sensor 70 is a waterproof pressure sensor.

[0051] In other embodiments, the pressure sensor 70 may also be disposed within the balloon 10.

[0052] The skin expander 1 also includes a display (not shown), and the pressure sensor 70 is wirelessly or wiredly connected to the display.

[0053] In this embodiment, the pressure sensor 70 is wirelessly connected to the display.

[0054] In this embodiment, the pressure data monitored by the pressure sensor 70 is transmitted to the display for medical staff to view, and the medical staff can adjust the injection of liquid in a timely manner based on the pressure data.

[0055] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A skin expander, characterized in that, include: balloon; The catheter includes a first end and a second end, and the balloon is disposed on the catheter and close to the first end. The catheter includes an inner tube and an outer tube, and the outer tube is sleeved outside the inner tube and communicates with the balloon. A guide pin, the guide pin being adapted to be inserted into the inner tube from the second end and extend along the inner tube to the first end; A syringe connected to the outer tube, the syringe being used to inject liquid into the balloon through the outer tube.

2. The skin expander as described in claim 1, characterized in that, It also includes an injection port, which is disposed on the catheter, and the syringe is connected to the outer tube through the injection port.

3. The skin expander as described in claim 2, characterized in that, It also includes a one-way valve, which is disposed on the injection port.

4. The skin expander as described in claim 3, characterized in that, The one-way valve includes: a housing, wherein a valve cavity is provided within the housing, the valve cavity including an inlet end and an outlet end; a valve core, wherein the valve core is disposed within the valve cavity, the valve core including an abutment portion, the abutment portion being adapted to block or open the inlet end of the valve cavity under the action of external force; and an elastic element, wherein the elastic element is sleeved on the valve core, one end of the elastic element abutting against the abutment portion, and the other end of the elastic element abutting against the outlet end of the valve cavity.

5. The skin expander as described in claim 4, characterized in that, The syringe includes an injection end for pushing the valve core, causing the valve core to move along the axial direction of the valve cavity to open the inlet end of the valve cavity.

6. The skin expander as described in claim 5, characterized in that, When the abutment portion blocks the inlet end, the elastic element has a first compression amount; when the abutment portion opens the inlet end, the elastic element has a second compression amount, the second compression amount being greater than the first compression amount.

7. The skin expander as described in claim 6, characterized in that, The elastic element includes a spring.

8. The skin expander as described in claim 2, characterized in that, It also includes a pressure sensor, which is disposed on the inner wall of the injection port.

9. The skin expander as described in claim 8, characterized in that, It also includes a display, and the pressure sensor is wirelessly or wiredly connected to the display.

10. The skin expander as claimed in claim 1, characterized in that, The balloon is made of silicone.

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