Postoperative wound compression device

Abstract

The invention relates to the technical field of medical equipment, in particular to a postoperative wound compression device which comprises a hollow thin-sheet-shaped air bag and a quantification cylinder with an opening in one end and of a hollow structure, and a heat absorption expansion medium is stored in the air bag; the quantification cylinder is fixedly connected with one end of the air bag, and the interior of the closed end of the quantification cylinder communicates with the interior of the air bag. A piston and an elastic supporting piece are arranged in the middle of the quantification cylinder, and the piston and the quantification cylinder are in sliding and sealing fit; one end of the elastic support member abuts against one end of the piston facing the opening of the quantification cylinder, and the other end abuts against the inner wall of the opening end of the quantification cylinder. The problems that in the prior art, a bandage mainly depends on personal experience of medical staff to conduct pressure judgment, and the compression force is difficult to quantify and accurately control are solved.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a postoperative wound compression device. Background Technology

[0002] Minimally invasive interventional surgery for tumors is an important treatment method, widely used in clinical practice due to its advantages such as minimal trauma and precise positioning. Postoperatively, to prevent wound bleeding, pressure is usually applied to the puncture site for hemostasis. For example, in clinical practice, it is common to use an elastic bandage to wrap around the patient's wound for compression and fixation.

[0003] However, this traditional method of compression relies heavily on the personal experience of medical staff for manual bandaging and pressure assessment, making it difficult to quantify and precisely control the compression intensity. Insufficient compression may lead to wound bleeding or hematoma formation; excessive compression can easily cause local skin tissue ischemia and necrosis, and even complications such as nerve damage. Furthermore, during prolonged postoperative compression, changes in patient position or limb movement can alter the tightness of the bandage, resulting in unstable compression effects and impacting the patient's recovery process and overall medical experience. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a postoperative wound compression device to solve the problem that the existing bandage mainly relies on the personal experience of medical staff to judge the pressure, making it difficult to quantify and accurately control the compression force.

[0005] This invention is achieved through the following technical solution: A postoperative wound compression device includes a hollow, sheet-like air bladder and a hollow, open-end cylinder, wherein the air bladder contains a heat-absorbing and expanding medium. The quantizing cylinder is fixedly connected to one end of the airbag, and the inside of the closed end of the quantizing cylinder is connected to the inside of the airbag. A piston and an elastic support are provided in the middle of the quantifying cylinder, and the piston slides and seals with the quantifying cylinder. One end of the elastic support abuts against the end of the piston facing the opening of the quantifying cylinder, and the other end abuts against the inner wall of the opening end of the quantifying cylinder.

[0006] Furthermore, the inner diameter of the closed end of the quantification cylinder is smaller than the inner diameter of the open end, and a through hole for communicating with the airbag is provided on the inner wall of the closed end of the quantification cylinder. The piston is embedded in the opening end of the quantizing cylinder and slides coaxially with the inner wall of the opening end of the quantizing cylinder.

[0007] Furthermore, a retaining block is provided inside the opening end of the quantifying cylinder, and the retaining block slides in cooperation with the inner wall of the quantifying cylinder along the axial direction of the quantifying cylinder; The elastic support is disposed between the piston and the abutment block, and both ends of the elastic support abut against the piston and the abutment block respectively; An adjustment part is provided between the support block and the quantizing cylinder to drive the support block to slide inside the quantizing cylinder.

[0008] Furthermore, the adjustment part includes a support block and a lead screw. The support block is fixedly installed inside the opening end of the measuring cylinder, and a threaded hole coaxial with the measuring cylinder is provided on the support block. One end of the lead screw passes through a threaded hole and is fixedly connected to the abutment block, and the lead screw and the threaded hole are connected by a threaded engagement.

[0009] Furthermore, the quantizing cylinder is made of a transparent material, and scale lines are evenly arranged along the axial direction of the quantizing cylinder on its outer circular surface.

[0010] Furthermore, a membrane is provided on the inner surface of the inner wall of the airbag, and the edge of the membrane is closely attached to the inner surface of the airbag to form a sealed cavity for storing the heat-absorbing expansion medium.

[0011] Furthermore, the sealed cavity is a long strip extending along the width of the airbag, and multiple sealed cavities are provided and evenly arranged along the length of the airbag.

[0012] Furthermore, the heat-absorbing expansion medium is a solid-liquid phase change material with a phase change temperature between 25-34℃.

[0013] Furthermore, the solid-liquid phase change material includes one or both of n-octadecane and n-nonadecane.

[0014] Furthermore, annular protrusions are provided on the outer walls of both ends of the quantification cylinder.

[0015] The beneficial effects of this invention are as follows: This postoperative wound compression device uses an airbag instead of a traditional elastic bandage for wrapping and compression. By filling the airbag with a heat-absorbing and expanding medium, when the airbag comes into contact with the patient's skin, it can transfer heat from the skin surface to the heat-absorbing and expanding medium. The heat-absorbing and expanding medium expands, increasing its volume and causing the airbag to swell. With the end of the airbag fixed, it can further compress the patient's wound. Compared with the compression method of traditional elastic bandages, this device can reduce the pressure difference in different parts of the compressed area.

[0016] Meanwhile, when the pressure inside the airbag changes, it can drive the piston to slide inside the quantizing cylinder, and use the elastic support to provide elastic support for the piston. By observing and measuring the deformation of the elastic support or the position of the piston inside the quantizing cylinder, the magnitude of the compression force can be determined and quantified for precise control.

[0017] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present invention; Figure 2 This is a schematic diagram of the planar structure of an embodiment of the present invention; Figure 3 for Figure 2 Sectional view of AA; Figure 4 for Figure 2 A cross-sectional view of BB.

[0019] In the diagram: 1. Measuring cylinder; 11. Through hole; 12. Support block; 13. Scale line; 14. Diaphragm; 15. Annular protrusion; 2. Airbag; 3. Heat-absorbing expansion medium; 4. Piston; 5. Compression spring; 6. Support block; 7. Lead screw. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the above description of the present invention, it should be noted that the terms "one side," "the other side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is conventionally placed during use. These terms are used only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] Furthermore, terms such as "identical" do not imply that components must be absolutely identical; minor differences are permissible. The term "perpendicular" simply means that the positional relationship between components is more perpendicular than "parallel," not that the structure must be perfectly perpendicular; a slight tilt is acceptable.

[0025] Please see Figure 1-4 The present invention provides a technical solution: a postoperative wound compression device, comprising a hollow, sheet-like air bladder 2 and a hollow, open-end cylinder 1, wherein the air bladder 2 contains a heat-absorbing and expanding medium 3. The quantizing cylinder 1 is fixedly connected to one end of the airbag 2, and the inside of the closed end of the quantizing cylinder 1 is connected to the inside of the airbag 2. A piston 4 and an elastic support are provided in the middle of the quantifying cylinder 1. The piston 4 slides and seals with the quantifying cylinder 1. One end of the elastic support abuts against the end of the piston 4 facing the opening of the quantifying cylinder 1, and the other end abuts against the inner wall of the opening end of the quantifying cylinder 1.

[0026] In this solution, an airbag 2 is used instead of a traditional elastic bandage for wrapping and compression. By filling the airbag 2 with a heat-absorbing and expanding medium 3, when the airbag 2 comes into contact with the patient's skin, the heat on the skin surface can be transferred to the heat-absorbing and expanding medium 3. The heat-absorbing and expanding medium 3 expands, increasing its volume and causing the airbag 2 to swell. With the end of the airbag 2 fixed, it can further compress the patient's wound. Compared with the compression method of traditional elastic bandages, this device can reduce the pressure difference in different parts of the compressed area.

[0027] Meanwhile, when the pressure inside the airbag 2 changes, it can drive the piston 4 to slide inside the quantizing cylinder 1, and use the elastic support to provide elastic support for the piston 4. By observing and measuring the deformation of the elastic support or the position of the piston 4 inside the quantizing cylinder 1, the magnitude of the compression force can be determined and the compression force can be quantified for precise control.

[0028] The airbag 2 is made of a soft but inelastic material (such as polypropylene). The interior of the airbag 2 is connected to the closed end of the quantizing cylinder 1, and the piston 4 is used to seal the open end of the quantizing cylinder 1, so that the interior of the airbag 2 and the interior of the quantizing cylinder 1 together form a sealed space for storing the heat-absorbing expansion medium 3 and air.

[0029] The elastic support is a compression spring 5, which is placed axially toward the quantizing cylinder 1 to provide elastic support for the piston 4. The deformation of the compression spring 5 is used to quantify the change in pressure inside the airbag 2, so as to help determine the magnitude of the pressure on the skin.

[0030] Additionally, a hook and loop fastener can be provided on the outer surface of the inner wall of the airbag 2 (for contact with the skin) to allow the hook and loop fastener to contact the skin, and a hook and loop fastener can be provided on the outer surface of the outer wall of the airbag 2 to allow the two ends of the airbag 2 to be fixed by the adhesive connection of the hook and loop fastener.

[0031] In this embodiment: the inner diameter of the closed end of the quantification cylinder 1 is smaller than the inner diameter of the open end, and a through hole 11 for communicating with the airbag 2 is provided on the inner wall of the closed end of the quantification cylinder 1. The piston 4 is embedded in the open end of the quantizing cylinder 1 and slides coaxially with the inner wall of the open end of the quantizing cylinder 1.

[0032] In this scheme, the inside of the quantizing cylinder 1 is stepped. By embedding the piston 4 into the open end (the section with the smaller inner diameter) of the quantizing cylinder 1, the piston 4 is supported by the stepped surface inside the quantizing cylinder 1, which restricts the piston 4 from sliding into the closed end of the quantizing cylinder 1, thus covering and blocking the through hole 11, so that the inside of the airbag 2 and the closed end of the quantizing cylinder 1 are always in a smooth state.

[0033] In this embodiment: a retaining block 6 is also provided inside the opening end of the quantifying cylinder 1, and the retaining block 6 slides with the inner wall of the quantifying cylinder 1 along the axial direction of the quantifying cylinder 1; The elastic support is disposed between the piston 4 and the abutment block 6, and both ends of the elastic support abut against the piston 4 and the abutment block 6 respectively; An adjustment part is provided between the supporting block 6 and the quantizing cylinder 1 to drive the supporting block 6 to slide inside the quantizing cylinder 1.

[0034] In this design, the abutment block 6 is used to abut the elastic support (compression spring 5), indirectly supporting the piston 4, and the abutment block 6 is slidably engaged with the quantitative cylinder 1. The abutment block 6 is driven to slide axially within the quantitative cylinder 1 by the adjustment part, adjusting the initial / end deformation of the elastic support (compression spring 5), which is suitable for different patients and different surgical sites (such as after arterial puncture and after thyroid surgery) requiring different ideal compression forces.

[0035] During compression, when the patient's position changes or the air bladder 2 leaks slightly, the pressure inside the air bladder 2 decreases. The compression spring 5 then pushes the piston 4 towards the closed end of the measuring cylinder 1 to compensate for the reduced pressure, maintaining the pressure inside the air bladder 2 near the original set value, thus playing an automatic pressure stabilizing role. Medical staff can visually and quickly judge the pressure changes by observing the positional changes of the piston 4.

[0036] In this embodiment: the adjustment part includes a support block 12 and a lead screw 7. The support block 12 is fixedly installed inside the opening end of the quantifying cylinder 1, and the support block 12 is provided with a threaded hole coaxial with the quantifying cylinder 1. One end of the lead screw 7 passes through a threaded hole and is fixedly connected to the abutment block 6, and the lead screw 7 and the threaded hole are connected by a threaded engagement.

[0037] In this design, the support block 6 is cylindrical in shape, and one end of the lead screw 7 is coaxially fixedly connected to the support block 6. When the lead screw 7 rotates in the threaded hole, the support block 6 rotates inside the quantizing cylinder 1 and slides along the axial direction of the quantizing cylinder 1 to adjust the position of the support block 6 inside the quantizing cylinder 1.

[0038] In use, medical staff hold the lead screw 7 at one end outside the measuring cylinder 1, control the lead screw 7 to rotate, adjust the position of the support block 6, so that the compression spring 5 is in a naturally extended state, and then the inner wall of the back of the airbag 2 to the measuring cylinder 1 is pressed against the skin near the wound. The airbag 2 is spirally wrapped and the end of the airbag 2 is fixed (such as using Velcro with the rough side and hook side to stick). The heat on the patient's skin surface is transferred to the heat-absorbing expansion medium 3 through the airbag 2, which increases the volume of the heat-absorbing expansion medium 3, increases the space occupied inside the airbag 2, reduces the space used to store air inside the airbag 2, and makes the airbag 2 expand taut, compressing the subcutaneous tissue to perform hemostasis and other functions.

[0039] Under the action of air pressure, piston 4 is pushed close to the holding block 6, and compression spring 5 is squeezed and contracted. When the deformation of compression spring 5 tends to be stable, the holding block 6 (piston 4) is moved closer to or away from the opening of the quantizing cylinder 1 by rotating the screw 7, thereby changing the air pressure in the airbag 2 and adjusting the pressure on the skin. The pressure can also be adjusted by reading the deformation of compression spring 5.

[0040] In this embodiment: the quantizing cylinder 1 is made of transparent material, and scale lines 13 are evenly arranged along the axial direction of the quantizing cylinder 1 on the outer circular surface of the quantizing cylinder 1.

[0041] In this design, the quantizing cylinder 1 is made of transparent material, allowing the positions of the internal piston 4 and the supporting block 6 to be observed through it. The scale line 13 is used to represent the axial dimension data of the quantizing cylinder 1. By reading the two scale lines 13 corresponding to the opposite ends of the piston 4 and the supporting block 6, and calculating the difference, the deformation of the compression spring 5 can be obtained.

[0042] In this embodiment: a membrane 14 is provided on the inner surface of the inner wall of the airbag 2, and the edge of the membrane 14 is closely attached to the inner surface of the airbag 2 to form a sealed cavity for storing the heat-absorbing expansion medium 3.

[0043] In this scheme, the heat-absorbing expansion medium 3 is stored in a sealed cavity, and the membrane 14 is used to restrict its entry into the quantification cylinder 1, thereby reducing the risk of leakage.

[0044] The diaphragm 14 can be made into a sealed bag or a sealed ball. After the heat-absorbing expansion medium 3 is added into the bag or ball, the internal air is extracted and sealed. Then the diaphragm 14 is placed inside the airbag 2 and fixed (e.g., by bonding). The entire operation is carried out by the factory production end.

[0045] The diaphragm 14 can be made of an elastic material (such as thermoplastic polyurethane) or a non-elastic flexible material (such as polypropylene).

[0046] During use, when the heat-absorbing expansion medium 3 expands and its volume increases, the diaphragm 14 deforms or stretches and expands, increasing the space occupied inside the airbag 2, causing the air pressure inside the airbag 2 to rise and push the piston 4 to slide inside the quantitative cylinder 1. The compression spring 5 deforms and contracts, while the airbag 2 expands and tightens to perform compression hemostasis.

[0047] In this embodiment: the sealed cavity is a long strip extending along the width of the airbag 2, and multiple sealed cavities are provided and evenly arranged along the length of the airbag 2.

[0048] In this scheme, multiple sealed cavities are arranged along the length of the airbag 2 to absorb heat at multiple points near the patient's wound, causing the airbag 2 to expand rapidly and perform compression.

[0049] In this embodiment, the heat-absorbing expansion medium 3 is a solid-liquid phase change material with a phase change temperature between 25-34℃.

[0050] In this design, the phase change material absorbs and stores a large amount of latent heat during the phase transition (solid-liquid) while its temperature remains essentially constant. Compared to ordinary materials that rely solely on temperature increases to cause volume expansion (sensible thermal expansion), the phase change material can achieve significant volume changes with a very small temperature difference. This means that only a small amount of heat transfer from the patient's skin is needed to drive the airbag 2 to produce sufficiently noticeable swelling, thereby providing effective and continuous pressure. What ordinary materials might require a temperature increase of tens of degrees Celsius to achieve, the phase change material can accomplish within a few degrees Celsius.

[0051] It can also absorb excess inflammatory heat that may be generated in the postoperative wound, creating a temperature-stable microenvironment for the wound area, which helps improve patient comfort and promote healing.

[0052] Once the airbag 2 is wrapped around the body, the heat from the skin surface (typically at 32-34°C) is rapidly transferred to the phase change material. Once the material reaches its phase change point, it begins to absorb heat and transforms from a solid to a liquid state.

[0053] When the patient's body surface temperature is low and the airbag 2 does not inflate effectively, heat loss can be reduced by covering the patient with a quilt or warm blanket, so that the airbag 2 is in a higher temperature environment and can fully inflate to perform its compression function.

[0054] In this embodiment, the solid-liquid phase change material includes one or both of n-octadecane and n-nonadecanane.

[0055] In this scheme, both n-octadecane and n-nonadecanane are organic solid-liquid phase change materials. Specifically, the phase transition temperature of n-octadecane is approximately 28℃, and the phase transition temperature of n-nonadecanane is approximately 32℃ and 36.7℃, respectively.

[0056] For example, mixing n-octadecane and n-nonadecanane in a certain ratio (e.g., 6:4) yields a heat-absorbing expansion medium 3 with a melting range of 29℃-33℃. It has a rapid response and is suitable for scenarios that require rapid pressure build-up.

[0057] In this embodiment, annular protrusions 15 are provided on the outer walls of both ends of the quantifying cylinder 1.

[0058] In this design, the quantizing cylinder 1 can be used to wrap and store the airbag 2, and the annular protrusion 15 restricts the airbag 2 from sliding along the axial direction of the quantizing cylinder 1. It can also be used to support the entire device. When the airbag 2 is completely wrapped and stored in the middle of the quantizing cylinder 1, the annular protrusion 15 protrudes from the outer circumference of the airbag 2 to facilitate the storage and transportation of the device.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A post-operative wound compression device, characterized in that: The application relates to a heat-absorbing and expanding device, which comprises a hollow sheet-shaped air bag (2) and a quantification cylinder (1) with a hollow structure at one end, wherein the air bag (2) stores heat-absorbing and expanding medium (3) inside. The quantification cylinder (1) is fixedly connected with the air bag (2) at one end, and the inside of the closed end of the quantification cylinder (1) is communicated with the inside of the air bag (2). A piston (4) and an elastic supporting element are arranged in the middle of the quantification cylinder (1), the piston (4) is in sliding and sealing cooperation with the quantification cylinder (1), and one end of the elastic supporting element is in abutment with the end of the piston (4) facing the opening of the quantification cylinder (1), and the other end is in abutment with the inner wall of the opening end of the quantification cylinder (1). The inner diameter of the closed end of the quantification cylinder (1) is smaller than that of the opening end, and a through hole (11) for communication with the air bag (2) is formed in the inner wall of the closed end of the quantification cylinder (1).

2. The post-operative wound compression device of claim 1, wherein: The piston (4) is embedded in the opening end of the quantification cylinder (1) and is in coaxial sliding cooperation with the inner wall of the opening end of the quantification cylinder (1). A bearing block (6) is further arranged in the opening end of the quantification cylinder (1) and is in axial sliding cooperation with the inner wall of the quantification cylinder (1).

3. The post-operative wound compression device of claim 1, wherein: The elastic supporting element is arranged between the piston (4) and the bearing block (6) and is in abutment with the piston (4) and the bearing block (6) at two ends. An adjusting part is arranged between the bearing block (6) and the quantification cylinder (1) and is used for driving the bearing block (6) to slide in the quantification cylinder (1). The adjusting part comprises a supporting block (12) and a screw rod (7), the supporting block (12) is fixedly installed in the opening end of the quantification cylinder (1) and is provided with a threaded hole coaxial with the quantification cylinder (1), one end of the screw rod (7) penetrates through the threaded hole and is fixedly connected with the bearing block (6), and the screw rod (7) is connected with the threaded hole through thread cooperation.

4. The post-operative wound compression device of claim 3, wherein: The quantification cylinder (1) is made of transparent material, and scale lines (13) are uniformly arranged on the outer circumferential surface of the quantification cylinder (1) along the axial direction of the quantification cylinder (1). A diaphragm (14) is arranged on the inner surface of the inner wall of the air bag (2), the edge of the diaphragm (14) is tightly attached to the inner surface of the air bag (2), and a sealed cavity for storing the heat-absorbing and expanding medium (3) is formed.

5. The post-operative wound compression device of claim 1, wherein: The sealed cavity is in a strip shape extending along the width direction of the air bag (2), a plurality of sealed cavities are arranged, and the sealed cavities are uniformly arranged along the length direction of the air bag (2).

6. The post-operative wound compression device of claim 1, wherein: The heat-absorbing and expanding medium (3) is a solid-liquid phase change material with a phase change temperature of 25-34 DEG C.

7. The post-operative wound compression device of claim 6, wherein: The solid-liquid phase change material comprises one or both of n-octadecane and n-nonadecane.

8. The post-operative wound compression device of claim 1, wherein: Annular protrusions (15) are arranged on the outer walls of the two ends of the quantification cylinder (1).

9. The post-operative wound compression device of claim 8, wherein: ​ 10. The post-operative wound compression device of claim 1, wherein: ​

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