Non-invasive Skin External Expander for Congenital Syndactyly of Limbs and Its Usage Method

Abstract

The present invention discloses a non-invasive skin external expander for congenital syndactyly of the extremities and its usage method. The external expander includes a lever frame body, a pressure regulator, and a pressing head. The lever frame body includes a first lever frame and a second lever frame. The first lever frame includes a first clamping part at the front end and a first grasping part at the rear. The second lever frame includes a second clamping part at the front end and a second grasping part at the rear. Pressing heads are respectively installed on the first clamping part and the second clamping part. The middle parts of the first lever frame and the second lever frame are rotationally connected through the pressure regulator. The first grasping part and the second grasping part can move towards each other when a force is applied, so that the first clamping part and the second clamping part separate away from each other. After separation, the first clamping part and the second clamping part can move towards each other under the action of the pressure regulator to close and clamp the skin. The skin external expander of the present invention is simple to operate and can achieve the purpose of skin expansion without surgery.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly relates to a non-invasive skin external expander for congenital syndactyly / syndactylism of the extremities and a using method thereof. Background Art

[0002] At present, skin expanders for congenital syndactyly / syndactylism of the extremities are divided into two types. One is the water-injected silicone capsule skin expander applied in plastic surgery. For example, the invention patent with the publication number CN106618754A discloses a syndactyly skin expander, which includes an expander main body, a metal core guide needle and a water injection valve. The expander main body is sleeved on the upper part of the metal core guide needle, and the water injection valve is communicated with the expander main body through a capillary pipeline. The water injection valve injects physiological saline into the expander main body. The upper part of the expander main body expands into a column shape, and its lower part expands into a spherical shape. The other is the expander of the metal external fixator type.

[0003] Both of the above two skin expanders are invasive and require surgery to complete the implantation to achieve the purpose of skin expansion. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a non-invasive skin external expander for congenital syndactyly / syndactylism of the extremities, which is simple to operate and can achieve the purpose of skin expansion without surgery.

[0005] To solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A non-invasive skin external expander for congenital syndactyly / syndactylism of the extremities includes a lever frame main body, a pressure regulator and a pressing head. The lever frame main body includes a first lever frame and a second lever frame. The first lever frame includes a first clamping part at the front end and a first grasping part at the rear. The second lever frame includes a second clamping part at the front end and a second grasping part at the rear. Pressing heads are respectively installed on the first clamping part and the second clamping part. The skin is clamped between the pressing heads. The middle parts of the first lever frame and the second lever frame are rotationally connected through a pressure regulator. The pressure regulator is used to adjust the clamping force between the pressing heads. The first grasping part and the second grasping part can move towards each other when force is applied, so that the first clamping part and the second clamping part separate away from each other. After separation, the first clamping part and the second clamping part can move towards each other under the action of the pressure regulator to close and clamp the skin.

[0007] Preferably, the pressure regulator is a spring, which saves costs.

[0008] Preferably, the first lever frame and the second lever frame are symmetrically arranged. The front part of the first lever frame is set as a first arc-shaped structure that bends upward and inward. The first clamping part is arranged at the proximal end of the first arc-shaped structure. The first gripping part is set as a rod-shaped structure that extends upward and backward. The front part of the second lever frame is set as a second arc-shaped structure that bends downward and inward. The second clamping part is arranged at the proximal end of the second arc-shaped structure. The second gripping part is set as a rod-shaped structure that extends downward and backward. The first arc-shaped structure and the second arc-shaped structure are combined to form a circular shape that can span the affected area of the patient. This setting is more labor-saving.

[0009] Preferably, the first lever frame is provided with a positioning groove at the rotation connection, and the second lever frame is provided with a positioning protrusion. The positioning protrusion corresponds to the positioning groove in position and is arranged in the positioning groove, which is convenient for positioning the rotation of the first lever frame and the second lever frame and preventing them from displacing during use.

[0010] Preferably, the pressing head is detachably installed on the first clamping part and the second clamping part, which is convenient for replacing parts.

[0011] Further preferably, the pressing head is slidably arranged on the first clamping part and the second clamping part. The pressing head is provided with a sliding groove, and the first clamping part and the second clamping part are respectively provided with flanges. The sliding groove is adapted to the shape of the flange, which is convenient for processing and forming and saves costs.

[0012] Further preferably, the shape of the sliding groove is wedge-shaped, T-shaped or special-shaped, and the shape of the flange is wedge-shaped, T-shaped or special-shaped, and the combination is more firm.

[0013] Preferably, the pressing head is provided with a gasket, and the patient feels more comfortable.

[0014] Further preferably, the gasket has a non-smooth surface, which can be a serrated configuration, or other surfaces such as lugs, bead blasting or sandblasting, etc., to increase the friction and hold more firmly.

[0015] The present invention also adopts another technical solution:

[0016] The using method of the above-mentioned external expander includes the following steps: (1) When expanding the skin of congenital syndactyly / syndactylism of the extremities, first measure the width between the positions where the surface centers of two connected fingers / toes deviate 30-60° from each other in opposite directions, and select a pressing head with the same width; (2) Connect the pressing head to the main body 1 of the lever frame, pad with a silicone gasket, and clamp it at the part where skin expansion is required. The direction of the pressing head clamping the skin expansion is perpendicular to the finger length direction; (3) When the pressing head completely slides from the surface of the phalanx to the skin, that is, when the upper and lower pressing heads touch each other, select a pressing head of a larger size and continue the skin expansion; (4) Repeat step (3) until the expanded skin is sufficient to cover the skin defect after separating the syndactylous fingers / toes.

[0017] Due to the implementation of the above technical solutions, the present invention has the following advantages compared with the prior art:

[0018] The present invention can be applied to patients before surgery. By converting pressure into tension, the purpose of skin expansion is achieved, providing sufficient skin for the separation and wound coverage during the surgery for congenital syndactyly / syndactylism of the extremities, and avoiding the trauma caused by skin grafting. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of Embodiment 1;

[0020] Figure 2 It is a side view of the indenter in Embodiment 1;

[0021] Figure 3 It is a top view of the indenter in Embodiment 1;

[0022] Figure 4 It is a schematic structural diagram of the gasket in Embodiment 2;

[0023] Wherein: 1. Lever frame main body; 11. First lever frame; 111. First arc structure; 112. First clamping part; 113. First gripping part; 114. Positioning groove; 12. Second lever frame; 121. Second arc structure; 122. Second clamping part; 123. Second gripping part; 124. Positioning projection; 13. Slide rail; 2. Spring; 21. Vertical part; 22. Bent part; 3. Indenter; 31. Slide groove; 4. Flange; 5. Gasket. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The following further describes the present invention in detail with reference to the drawings and specific embodiments. For the sake of clarity of the disclosure, the terms "far" and "near" are defined herein with respect to the operator of the external expander. The term "near" refers to the position of the element that is closer to the operator of the external expander and farther from the indenter. The term "far" refers to the position of the element that is closer to the indenter and farther from the operator of the external expander. The terms "upper", "lower", "left", and "right" are defined herein with respect to the planar position in the drawings. The terms "upper" and "lower" refer to the upper and lower orientations in the drawings, and the terms "left" and "right" refer to the left and right orientations in the drawings.

[0025] Embodiment 1

[0026] As shown in the attached Figure 1 to the attached Figure 3 figures, a non-invasive skin external expander for congenital syndactyly / syndactylism of the extremities of the present invention includes a lever frame main body 1, a pressure regulator, and an indenter 3.

[0027] The lever frame body 1 includes a symmetrically arranged first lever frame 11 and a second lever frame 12. The middle parts of the first lever frame 11 and the second lever frame 12 are rotationally connected by a pressure regulator. The front part of the first lever frame 11 is set as a first arc-shaped structure 111 that bends upward and inward. A first clamping part 112 is arranged at the proximal end of the first arc-shaped structure 111. The rear part of the first lever frame 11 is set as a first gripping part 113 in the shape of a rod that extends upward and backward. The front part of the second lever frame 12 is set as a second arc-shaped structure 121 that bends downward and inward. A second clamping part 122 is arranged at the proximal end of the second arc-shaped structure 121. The rear part of the second lever frame 12 is set as a second gripping part 123 in the shape of a rod that extends downward and backward. The first arc-shaped structure 111 and the second arc-shaped structure 121 are combined to form a circular shape that can span the affected area of the patient, and this setting is more labor-saving. Pressure heads 3 are respectively installed on the first clamping part 112 and the second clamping part 122, and the skin is clamped between the pressure heads 3. The first gripping part 113 and the second gripping part 123 can move towards each other when a force is applied to them by the operator, so that the first clamping part 112 and the second clamping part 122 move away from each other in the opposite direction. After separation, the first clamping part 112 and the second clamping part 122 can move towards each other under the action of the pressure regulator to close and clamp the skin.

[0028] In this embodiment, the pressure regulator is used to adjust the clamping force between the pressure heads 3. The pressure regulator is a spring 2, which saves costs. The spring 2 can be made of different metals according to different elastic moduli of the metals to achieve the result of applying different pressures. The structure of the spring 2 in this embodiment is relatively simple, including a vertical part 21 and bending parts 22 that extend towards each other at both ends of the vertical part 21. The bending parts 22 are respectively fixedly installed on the first gripping part 113 and the second gripping part 123. Here, the spring can also be set as a torsion spring, and the torsion spring is fixed on the first gripping part 113 and the second gripping part 123 through a pin shaft.

[0029] In this embodiment, the first lever frame 11 is provided with a positioning groove 114 at the rotational connection, and the second lever frame 12 is provided with a positioning protrusion 124. The positioning protrusion 124 corresponds to the position of the positioning groove 114 and is arranged in the positioning groove 114, which is convenient for positioning the rotation of the first lever frame 11 and the second lever frame 12 and preventing them from displacing during use.

[0030] Facilitating the replacement of parts, the pressure head 3 is detachably mounted on the first clamping portion 112 and the second clamping portion 122. In this embodiment, the pressure head 3 is slidably disposed on the first clamping portion 112 and the second clamping portion 122. A chute 31 is provided on the pressure head 3, and flanges 4 are respectively provided on the first clamping portion 112 and the second clamping portion 122. The chute 31 and the flange 4 are adapted in shape, which is convenient for processing and forming and saves costs. In this embodiment, the shapes of the chute 31 and the flange 4 are T-shaped, and the combination is more firm. The detachable connection method of the pressure head 3 here can also be other methods such as snap connection and plug connection.

[0031] In this embodiment, the pressure head 3 has a cubic structure, with a height of 10 cm from top to bottom, a width of 10 cm from left to right, and a length of 10 mm from front to back. Here, the pressure head 3 can have multiple specifications, and the widths can be set to 8 mm, 10 mm, 12 mm, 14 mm respectively, while the length and height remain unchanged.

[0032] Embodiment 2

[0033] This embodiment is a further improvement based on Embodiment 1. The improvement lies in that: in order to make the patient feel more comfortable, a silicone gasket 5 is provided on the pressure head 3. As shown in the appendix Figure 4 The gasket 5 has a non-smooth surface, which is a serrated configuration, and can also be other surfaces such as lugs, bead blasting or sandblasting, etc., to increase the friction force and make the clamping more firm.

[0034] The usage method of the present invention includes the following steps: (1) When performing skin expansion on congenital syndactyly / syndactylia deformities of the extremities, first measure the width between the positions where the surface centers of two adjacent fingers / toes deviate 30-60° from each other in opposite directions, and select a pressure head 3 with the same width; (2) Connect the pressure head 3 to the lever frame main body 1, pad with a silicone gasket 4, and clamp it at the part where skin expansion is required. The direction of the pressure head 3 clamping the skin expansion is perpendicular to the finger length direction; (3) When the pressure head 3 completely slides from the surface of the phalanx to the skin, that is, when the upper and lower pressure heads 3 touch each other, then select a pressure head 3 of the next larger size and continue skin expansion; (4) Repeat step (3) until the expanded skin is sufficient to cover the skin defect after separating the syndactylous fingers / toes.

[0035] When in use, the pressure head 3 is selected from small to large, and has a good expansion effect.

[0036] The present invention converts pressure into tension to achieve the purpose of skin expansion, provides sufficient skin for the separation and wound coverage during the operation of congenital syndactyly / syndactylia deformities of the extremities, and is non-invasive.

[0037] The above has described the present invention in detail, but the present invention is not limited to the above embodiments. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A non-invasive skin external expander for congenital syndactyly of the extremities, characterized in that: It includes a lever frame body, a pressure regulator, and a pressing head. The lever frame body includes a first lever frame and a second lever frame. The first lever frame includes a first clamping part at the front end and a first gripping part at the rear. The second lever frame includes a second clamping part at the front end and a second gripping part at the rear. Pressing heads are respectively installed on the first clamping part and the second clamping part, and the skin is clamped between the pressing heads. The middle parts of the first lever frame and the second lever frame are rotatably connected by a pressure regulator, and the pressure regulator is used to adjust the clamping force between the pressing heads. The first gripping part and the second gripping part can move towards each other when force is applied, so that the first clamping part and the second clamping part move away from each other in the opposite direction. After separation, the first clamping part and the second clamping part can move towards each other under the action of the pressure regulator to close and clamp the skin; a positioning groove is provided at the rotation connection of the first lever frame, and a positioning protrusion is provided on the second lever frame. The positioning protrusion corresponds to the position of the positioning groove and is installed in the positioning groove; the pressing head is detachably installed on the first clamping part and the second clamping part; the first lever frame and the second lever frame are symmetrically arranged. The front part of the first lever frame is set as a first arc structure that bends upward and inward, and the front part of the second lever frame is set as a second arc structure that bends downward and inward. The first arc structure and the second arc structure combine to form a circular shape that can span the affected area of the patient; connect the pressing head to the lever frame body and clamp it at the part where skin expansion is required. When the pressing head completely slides from the surface of the phalanx to the skin, that is, when the upper and lower pressing heads touch each other, then select a pressing head of a larger size and continue with skin expansion until the expanded skin is sufficient to cover the skin defect after finger / toe separation.

2. The non-invasive skin external dilator for congenital syndactyly of the extremities according to claim 1, wherein: The first clamping part is arranged at the proximal end of the first arc structure, the first gripping part is set as a rod-shaped structure that extends upward and backward, the second clamping part is arranged at the proximal end of the second arc structure, and the second gripping part is set as a rod-shaped structure that extends downward and backward.

3. The non-invasive skin external expander for congenital syndactyly of the extremities according to claim 1, characterized in that: The pressing head is slidably arranged on the first clamping part and the second clamping part. A chute is provided on the pressing head, and flanges are respectively provided on the first clamping part and the second clamping part. The chute and the flange are adapted in shape.

4. The non-invasive skin external expander for congenital syndactyly of the extremities according to claim 1, characterized in that: A gasket is provided on the pressing head.

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