A device for preventing fat liquefaction
By designing a drainage syringe and needle assembly, the system enables rapid drainage and closed collection of subcutaneous fluid, solving the problem of fat liquefaction at the surgical incision site, reducing patient pain and infection risk, and improving the convenience and cleanliness of postoperative recovery.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUXI PEOPLES HOSPITAL
- Filing Date
- 2025-04-30
- Publication Date
- 2026-08-04
AI Technical Summary
Fat liquefaction at surgical incision sites is common in clinical practice. Traditional treatment methods increase patient suffering and workload for medical staff, and are prone to wound infection.
Design a device comprising a drainage syringe, a needle assembly, a drainage tube, and a fluid collection bag, utilizing a one-way valve structure to achieve rapid drainage and closed collection of subcutaneous fluid, reducing open incision procedures and avoiding fat liquefaction.
It effectively prevents fat liquefaction, reduces patient recovery pain, lowers the risk of wound infection, and improves ease of operation and cleanliness.
Smart Images

Figure CN224585109U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical device technology, specifically to a device for preventing fat liquefaction. Background Technology
[0002] Medical devices refer to instruments, equipment, appliances, in vitro diagnostic reagents and calibrators, materials, and other similar or related articles that are used directly or indirectly on the human body, including the necessary computer software. Their efficacy is primarily obtained through physical means, rather than through pharmacological, immunological, or metabolic means, or although these means are involved, they play only an auxiliary role.
[0003] In clinical practice, surgical incision fat liquefaction is relatively common. Obesity, diabetes, use of high-frequency electrosurgical units, intraoperative incision protection, poor incision suturing techniques, advanced age, and malnutrition all increase the risk of poor surgical incision healing. For patients with subcutaneous fat greater than 3 cm, the incidence of incision fat liquefaction is significantly increased. Traditional treatments for poor healing such as incision fat liquefaction involve opening the incision, removing necrotic tissue, rinsing, and squeezing the wound, which requires frequent dressing changes, increasing both patient suffering and the workload of medical staff. Utility Model Content
[0004] The purpose of this invention is to provide a device for preventing fat liquefaction, so as to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a device for preventing fat liquefaction, comprising a drainage syringe and a needle assembly, wherein the bottom end of the drainage syringe is connected to the needle assembly, and the lower side end of the drainage syringe is connected to a drain tube, and a fluid collection bag is installed on the side of the drain tube away from the drainage syringe; the needle assembly includes a drainage tube, a scalp needle, and a first one-way valve, wherein a scalp needle is installed at one end of the drainage tube, and a first one-way valve is installed at the end of the drainage tube away from the scalp needle.
[0006] Furthermore, the drainage syringe includes a syringe, a syringe scale, a first interface, a second interface, a plunger, a piston, a push plate, and a stabilizing rod. The syringe is provided on the outer surface of the syringe, and the first interface is provided at the bottom of the syringe. The second interface is provided on the lower side of the first interface. The plunger is installed inside the syringe, and the piston is installed at the bottom of the plunger. The push plate is provided at the top of the plunger, and the stabilizing rod is vertically provided at the bottom of the push plate.
[0007] Furthermore, the syringe, syringe scale, first interface, and second interface are integrated into a single structure, and the end of the first one-way valve away from the drainage tube is tightly connected to the first interface in a fitting structure.
[0008] Furthermore, the push rod and the push plate are integrated into one structure, and the stabilizing rods are arranged in a ring array with the push plate as the center, with four sets of them. Moreover, the stabilizing rods are slidably connected to the top of the syringe.
[0009] Furthermore, the drain fitting includes a connecting pipe, a second one-way valve, and a docking plug. One end of the connecting pipe is equipped with the second one-way valve, and the end of the connecting pipe away from the second one-way valve is provided with a docking plug.
[0010] Furthermore, the docking plug and the connecting pipe are integrally formed, and the end of the second one-way valve away from the connecting pipe is tightly connected to the second interface in a fitting structure.
[0011] Furthermore, the liquid accumulation bag includes a puncture-resistant bag body, a connecting port, and bag body markings. The connecting port is provided at the upper end of one side of the puncture-resistant bag body, and bag body markings are provided on the surface of the puncture-resistant bag body.
[0012] Furthermore, the puncture-resistant bag body, the connecting port, and the bag body scale are integrated into a single structure, and the puncture-resistant bag body, the connecting port, and the bag body scale connector are tightly connected to each other.
[0013] This invention provides a device for preventing fat liquefaction, which has the following beneficial effects:
[0014] 1. This utility model, by connecting a drainage syringe to the bottom of a drainage syringe, utilizes an insertion structure between two one-way valves to achieve rapid assembly and docking of the drainage syringe and needle assembly. When the plunger with a piston installed inside the syringe is pulled out, in conjunction with the use of a scalp needle, it is inserted into the superficial fascia and deep subcutaneous fat to quickly drain and remove subcutaneous fluid, thereby preventing fat liquefaction at the patient's skin incision. Simultaneously, the use of the scalp needle reduces the need for open incisions, removal of necrotic tissue, irrigation, and wound compression, minimizing the increase in wound size for the patient. This reduces postoperative pain and minimizes the risk of wound infection, while also avoiding unnecessary impact on wound healing.
[0015] 2. This utility model connects a drainage tube and a fluid collection bag to the lower end of one side of the drainage syringe. Utilizing the structural insertion between one end of the second one-way valve and the second interface, as well as the structural insertion between the connecting plugs, the drainage syringe, drainage tube, and fluid collection bag can be quickly connected and assembled. When the push rod with a piston at one end is pushed, the fluid inside the syringe is transported through the connecting tube to the inside of the puncture-proof bag. This, combined with the use of the needle assembly, enables continuous cleaning of subcutaneous fluid. With the above-mentioned structure, the incision fat tissue fluid inside the drainage syringe can be quickly drained while simultaneously achieving sealed collection for subsequent centralized treatment of the fluid. This ensures cleanliness throughout the operation and makes the device structure easy to use.
[0016] 3. This utility model, by setting a stabilizing rod between the push plate and the top of the syringe, utilizes this structure so that when the piston, which has a piston installed at one end, is pushed or pulled inside the syringe, the stabilizing rod, which is fixedly connected to the bottom of the push plate, will slide axially along the top of the syringe. This structure maximizes the structural support of the push rod during the pushing and pulling process, ensuring its stability and avoiding unnecessary impact on the aspiration or drainage of fluid, while also protecting the patient's health and safety. Furthermore, the use of the first one-way valve prevents fluid from flowing back into the needle assembly or even the patient's subcutaneous tissue during the process of the drainage syringe delivering fluid into the fluid bag using the drainage tube. The second one-way valve prevents fluid from flowing into the drainage syringe due to the connection of the drainage tube when using the drainage syringe to aspirate fluid from the patient's subcutaneous tissue, thus ensuring the overall effectiveness of the device. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the axial side view of the main body of the device for preventing fat liquefaction according to this utility model;
[0018] Figure 2 This is a schematic diagram of the drainage syringe structure of a device for preventing fat liquefaction according to this utility model;
[0019] Figure 3 This is a three-dimensional structural diagram of the drain pipe component of the device for preventing fat liquefaction according to this utility model;
[0020] Figure 4 This is a three-dimensional structural diagram of the drain pipe component of the device for preventing fat liquefaction according to this utility model;
[0021] Figure 5 This is a three-dimensional structural diagram of the liquid collection bag of the device for preventing fat liquefaction according to this utility model.
[0022] In the diagram: 1. Drainage syringe; 101. Syringe; 102. Syringe body scale; 103. First interface; 104. Second interface; 105. Push rod; 106. Piston; 107. Push plate; 108. Stabilizing rod; 2. Needle assembly; 201. Drainage tube; 202. Scalp needle; 203. First one-way valve; 3. Drainage fitting; 301. Connecting tube; 302. Second one-way valve; 303. Connecting plug; 4. Collection bag; 401. Puncture-resistant bag body; 402. Connecting port; 403. Bag body scale. Detailed Implementation
[0023] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.
[0024] like Figures 1 to 5 As shown, a device for preventing fat liquefaction includes a drainage syringe 1 and a needle assembly 2. The bottom end of the drainage syringe 1 is connected to the needle assembly 2, and the lower side end of the drainage syringe 1 is connected to a drain tube 3. A fluid bag 4 is installed on the side of the drain tube 3 away from the drainage syringe 1. The needle assembly 2 includes a drainage tube 201, a scalp needle 202, and a first one-way valve 203. The scalp needle 202 is installed at one end of the drainage tube 201, and the first one-way valve 203 is installed at the end of the drainage tube 201 away from the scalp needle 202. When the push rod 105 of the syringe 101, which is equipped with a piston 106, is pulled out, it is used in conjunction with the use of the scalp needle 202 to insert it into the superficial fascia and deep subcutaneous fat, so as to quickly drain and remove subcutaneous fluid, thereby avoiding fat liquefaction at the patient's skin incision.
[0025] like Figures 1 to 5As shown, the drainage syringe 1 includes a syringe 101, a syringe body scale 102, a first interface 103, a second interface 104, a plunger 105, a piston 106, a push plate 107, and a stabilizing rod 108. The syringe 101 is positioned on its outer surface, with the first interface 103 at its bottom and the second interface 104 at its lower side. The plunger 105 is installed inside the syringe 101, with the piston 106 mounted at its bottom. The push plate 107 is positioned at the top of the plunger 105, and the stabilizing rod 108 is vertically positioned at the bottom of the push plate 107. The syringe 101, syringe body scale 102, and first interface 103... The second interfaces 104 are integrated into each other, and the end of the first one-way valve 203 away from the drainage tube 201 is tightly connected to the first interface 103. The push rod 105 and the push plate 107 are integrated into each other, and the stabilizing rods 108 are arranged in a ring array with the push plate 107 as the center and there are four sets. The stabilizing rods 108 are slidably connected to the top of the syringe 101. When the push rod 105 with the piston 106 installed at one end is pushed, the accumulated fluid inside the syringe 101 can be transported to the inside of the anti-puncture bag 401 through the connecting tube 301. In combination with the use of the needle assembly 2, continuous cleaning of subcutaneous fluid can be achieved.
[0026] like Figures 1 to 5 As shown, the drainage pipe fitting 3 includes a connecting pipe 301, a second one-way valve 302, and a docking plug 303. The second one-way valve 302 is installed at one end of the connecting pipe 301, and the docking plug 303 is located at the end of the connecting pipe 301 away from the second one-way valve 302. The docking plug 303 and the connecting pipe 301 are integrally formed. The end of the second one-way valve 302 away from the connecting pipe 301 is tightly connected to the second interface 104. The liquid collection bag 4 includes a puncture-resistant bag body 401, a connecting port 402, and bag body markings 403. A marking is located on the upper side of one side of the puncture-resistant bag body 401. The bag has a connection port 402 and a bag scale 403 on its surface. The puncture-proof bag 401, the connection port 402 and the bag scale 403 are integrated into one structure. The puncture-proof bag 401, the connection port 402 and the bag scale 403 are connected to each other in a tight insertion structure. The insertion between one end of the second one-way valve 302 and the second interface 104, and the insertion between the two insertion plugs 303, can quickly connect and combine the drainage syringe 1, the drainage tube 3 and the collection bag 4.
[0027] In summary, as Figures 1 to 5As shown, when using this device for preventing fat liquefaction, firstly, the end of the first one-way valve 203 away from the drainage tube 201 is tightly inserted into the first interface 103. Then, the end of the second one-way valve 302 away from the connecting tube 301 is tightly inserted into the second interface 104. Finally, the end of the docking plug 303 away from the connecting tube 301 is tightly inserted into the connection port 402 on the upper side of the anti-puncture bag body 401. This allows for the rapid connection and combination of the drainage syringe 1, needle assembly 2, drainage tube 3, and effusion bag 4.
[0028] Then, the scalp needle 202 connected to one end of the drainage tube 201 is inserted into the superficial fascia and deep subcutaneous fat. Then, the push rod 105 with the piston 106 installed at one end of the syringe 101 is slowly and uniformly pulled. During this process, the stabilizing rod 108 connected to the bottom of the push plate 107 at the other end of the push rod 105 will slide along the upper end of the syringe 101 to ensure the stability of the entire push rod 105 during the pushing and pulling process. In this way, the subcutaneous fluid of the patient is gradually extracted and, under the delivery of the drainage tube 201, enters the inside of the syringe 101 through the first one-way valve 203 until it is full.
[0029] Next, the pusher plate 107 pushes the push rod 105 toward the end of the syringe 101 near the needle assembly 2, thereby discharging the fluid inside the syringe 101 from the second port 104 connected to the second one-way valve 302. Under the delivery of the connecting tube 301, the fluid enters the puncture-proof bag 401 with the bag scale 403 on its surface. The above method can achieve continuous fluid treatment, thereby preventing unnecessary fat liquefaction problems in patients.
[0030] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.
Claims
1. A device for preventing fat liquefaction, comprising a drainage syringe (1) and a needle and cannula assembly (2), characterized in that: The bottom end of the drainage syringe (1) is connected to a needle assembly (2), and the lower side of the drainage syringe (1) is connected to a drain tube (3). A fluid collection bag (4) is installed on the side of the drain tube (3) away from the drainage syringe (1). The needle assembly (2) includes a drainage tube (201), a scalp needle (202), and a first one-way valve (203). A scalp needle (202) is installed at one end of the drainage tube (201), and a first one-way valve (203) is installed at the end of the drainage tube (201) away from the scalp needle (202).
2. The device for preventing fat liquefaction according to claim 1, wherein The drainage syringe (1) includes a syringe (101), a cylindrical scale (102), a first interface (103), a second interface (104), a push rod (105), a piston (106), a push plate (107), and a stabilizing rod (108). The syringe (101) is provided on the outer surface of the syringe (101), and the first interface (103) is provided at the bottom of the syringe (101). The second interface (104) is provided on the lower side of the first interface (103). The push rod (105) is installed inside the syringe (101), and the piston (106) is installed at the bottom of the push rod (105). The push plate (107) is provided at the top of the push rod (105), and the stabilizing rod (108) is vertically provided at the bottom of the push plate (107).
3. The device for preventing fat liquefaction according to claim 2, wherein The syringe (101), the syringe scale (102), the first interface (103), and the second interface (104) are integrated into one structure, and the end of the first one-way valve (203) away from the drainage tube (201) is tightly connected to the first interface (103).
4. The device for preventing fat liquefaction according to claim 2, wherein The push rod (105) and the push plate (107) are integrated into one structure, and the stabilizer rod (108) is distributed in a ring array structure with the push plate (107) as the center and there are four sets. Moreover, the stabilizer rod (108) and the top of the syringe (101) are connected through slidingly.
5. The device for preventing fat liquefaction according to claim 2, wherein The drain pipe (3) includes a connecting pipe (301), a second one-way valve (302) and a docking plug (303). One end of the connecting pipe (301) is equipped with the second one-way valve (302), and the end of the connecting pipe (301) away from the second one-way valve (302) is provided with a docking plug (303).
6. A device for preventing fat liquefaction according to claim 5, wherein The docking plug (303) and the connecting pipe (301) are integrated into one structure, and the end of the second one-way valve (302) away from the connecting pipe (301) is tightly connected to the second interface (104) in a fitting structure.
7. The device for preventing fat liquefaction according to claim 5, wherein The liquid collection bag (4) includes a puncture-resistant bag body (401), a connecting port (402), and a bag body scale (403). The connecting port (402) is provided on the upper end of one side of the puncture-resistant bag body (401), and the bag body scale (403) is provided on the surface of the puncture-resistant bag body (401).
8. The device for preventing fat liquefaction according to claim 7, wherein The anti-puncture bag body (401), the connecting port (402) and the bag body scale (403) are arranged in an integrated structure, and the anti-puncture bag body (401), the connecting port (402) and the bag body scale (403) are connected with each other in a close insertion structure between the plug (303).