Simple incision negative pressure suction device for infants

Abstract

The utility model provides a kind of infant simple incision negative pressure suction device, dressing covers or fills skin, soft tissue defect wound;Biological semi-permeable membrane covers the outer surface of auxiliary material, and outer periphery is pasted to skin surface to form closed space containing dressing;Drainage tube front end is connected to biological semi-permeable membrane, and is communicated with closed space;Fine adjustment type negative pressure ware is connected to the rear end of drainage tube, including cylindrical shell and movable plug body, the inner chamber front end of cylindrical shell is communicated with drainage tube, movable plug body is slidably sealed in cylindrical shell, fine adjustment drive unit is set to the rear end of cylindrical shell and is driven to be connected with movable plug body, is configured as drive movable plug body moves along the inner chamber of cylindrical shell, to adjust the negative pressure of the inner chamber of cylindrical shell. Realize low negative pressure value's negative pressure suction, and carry out small range negative pressure value's accurate adjustment, to be suitable for low weight infant use, reduce the influence of negative pressure on infant cardiopulmonary circulation, and promote granulation growth, accelerate wound healing.

Description

Technical Field

[0001] This utility model relates to medical devices, and in particular provides a simple negative pressure suction device for infant incisions. Background Technology

[0002] With the widespread adoption of surgical treatment for congenital heart disease (CHD), CHD surgery is becoming increasingly complex and affecting younger children. my country sees 130,000 new cases of CHD each year (approximately 9,000 of whom are critically ill). The vast majority of critically ill CHD patients require surgery during infancy. In recent years, the mortality rate from surgery for critically ill children in my country has gradually decreased to approximately 5-10%. Simultaneously, the incidence of surgery-related complications is also declining. However, about 2% of children may still experience skin wound and deep tissue infections post-surgery, increasing the post-operative treatment period, adding to the medical burden, and causing psychological distress due to unsightly scarring.

[0003] Currently, VSD (Vacuum-assisted closure) negative pressure suction devices are often used to treat patients with refractory infections, such as those with prolonged postoperative infection, copious purulent discharge, and multiple purulent sinus tracts, achieving good clinical results. The negative pressure values ​​of commonly used VSD suction devices for adults are generally between -125 mmHg and -450 mmHg. The specific negative pressure value can be adjusted significantly based on the patient's actual condition, and is typically regulated using an electrically driven negative pressure pump.

[0004] However, there are currently no VSD (Vacuum-Assisted Surgery) devices specifically designed for infants and young children on the market. For infants, especially newborns, the minimum negative pressure setting for VSD is -25 mmHg, and the adjustment range is limited. Using a negative pressure pump to adjust the negative pressure over a wide range can cause significant fluctuations that severely impact the child's postoperative cardiopulmonary circulation, posing safety risks. While some devices connect a standard syringe to the drainage tube, manually moving the plunger to generate negative pressure requires precise plunger control, making operation difficult and demanding on the operator. Furthermore, the plunger cannot maintain a stable position after the operator removes their hand, causing the negative pressure to fluctuate. Therefore, current VSD devices for adults driven by negative pressure pumps are unsuitable for infants and young children, necessitating a dedicated incision negative pressure suction device for them. Utility Model Content

[0005] Based on this, the present invention provides a simple incision negative pressure suction device for infants and young children, which realizes negative pressure suction with low negative pressure value and allows for precise adjustment of negative pressure value within a small range, making it suitable for use by low-weight infants and young children, reducing the impact of negative pressure on the cardiopulmonary circulation of infants and young children, and reducing the difficulty of operation.

[0006] To achieve the above objectives, this utility model provides a simple negative pressure suction device for infant incisions, comprising: a dressing to cover or fill the wound surface with skin or soft tissue defects; a bio-semi-permeable membrane covering the outer surface of the dressing and adhering to the skin surface on its outer periphery to form a closed space containing the dressing; a drainage tube with its front end connected to the inside of the bio-semi-permeable membrane and communicating with the closed space; and a fine-tuning negative pressure device connected to the rear end of the drainage tube, comprising a cylindrical shell and a movable plug, wherein the front end of the inner cavity of the cylindrical shell is communicating with the drainage tube, the movable plug is slidably sealed inside the cylindrical shell, and the fine-tuning drive unit is disposed at the rear end of the cylindrical shell and drivenly connected to the movable plug, configured to drive the movable plug to move along the inner cavity of the cylindrical shell to adjust the negative pressure in the inner cavity of the cylindrical shell.

[0007] Furthermore, the fine-tuning drive unit includes a motor and an intermediate rod. The intermediate rod is circumferentially fixed inside the cylindrical housing. The front end of the intermediate rod is axially fixed to the rear end of the movable plug. The rear end of the intermediate rod is provided with a threaded hole extending forward along the central axis. The motor is fixedly disposed at the rear end of the cylindrical housing, and the motor shaft is provided with an external thread that meshes with the internal thread of the threaded hole.

[0008] Furthermore, the rear end center of the movable plug is provided with an axial recessed hole, the bottom of the axial recessed hole is provided with a bottom hole with an enlarged inner diameter, the intermediate rod is inserted into the axial recessed hole, and the front end of the intermediate rod is provided with a column that matches the inner diameter of the bottom hole.

[0009] Furthermore, the outer edge of the movable plug is provided with a sealing ring that mates with the inner cavity of the cylindrical shell, or the movable plug is an integral rubber structure.

[0010] Furthermore, the device also includes a pressure monitor, and the middle part of the drainage tube is connected to the pressure monitor via a tee fitting.

[0011] Furthermore, a pipe clamp is provided between the drainage tube and the fine-tuning negative pressure device, or a switch valve is provided at the front end of the fine-tuning negative pressure device.

[0012] Furthermore, the cylindrical housing 41 has an axially extending guide groove 411 in the middle of its inner cavity, and the intermediate rod 44 is provided with an axially extending guide block 441, which is in sliding engagement with the axial guide groove 411.

[0013] Furthermore, the dressing includes polyethylene alcohol hydrated alginate foam, and the bio-semi-permeable membrane is provided with an adhesive material that adheres to the skin surface on the outer periphery of the dressing.

[0014] Compared to existing technologies that use electrically driven negative pressure pumps for negative pressure regulation, this invention provides a simple negative pressure suction device for infant incisions. Its advantages are mainly reflected in the following: The device is sealed with a semi-permeable biological membrane containing a drainage tube, creating a closed space. The drainage tube is then connected to a fine-tuning negative pressure device to achieve low-pressure suction. The device allows for precise adjustment and stable maintenance of the negative pressure within a small range, making it suitable for low-weight infants. This reduces the impact of negative pressure on the infant's cardiopulmonary circulation, lowers operational difficulty, isolates the infant's incision wound from the external environment, promotes granulation tissue growth, and accelerates wound healing. This is a novel treatment device for promoting wound healing. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of the simple incision negative pressure suction device for infants and young children provided by this utility model.

[0016] Figure 2 This is a schematic diagram of the axial structure of the fine-tuning negative pressure device after part of the housing has been removed.

[0017] Figure 3 yes Figure 2 A sectional view in the AA direction.

[0018] Figure 4 This is a schematic diagram showing the state of the piston of the fine-tuning negative pressure device after adjustment.

[0019] Explanation of reference numerals in the attached figures: 1—Dressing; 2-Biological semipermeable membrane; 3-Drainage tube; 4-Adjustable negative pressure device, 41-Cylindrical housing, 411-Axial guide groove, 42-Modible plug, 43-Motor, 44-Intermediate rod, 441-Axial guide block; 5-Tee fitting; 6-Pressure monitor; 7-Switch valve. Detailed Implementation

[0020] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. It should be noted that the following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this utility model or its application or use.

[0021] like Figure 1 As shown, this utility model provides a simple negative pressure suction device for infant incisions, including a dressing 1, a bio-semi-permeable membrane 2, a drainage tube 3, and a fine-tuning negative pressure device 4. The dressing 1 covers or fills the wound surface with skin or soft tissue defects; the bio-semi-permeable membrane 2 covers the outer surface of the dressing and adheres to the skin surface to form a closed space containing the dressing 1; the front end of the drainage tube 3 is connected to the inside of the bio-semi-permeable membrane 2 and communicates with the closed space; the fine-tuning negative pressure device 4 is connected to the rear end of the drainage tube 3, including a cylindrical shell 41 and a movable plug 42. The front end of the inner cavity of the cylindrical shell 41 communicates with the drainage tube 3, the movable plug 42 is slidably sealed inside the cylindrical shell 41, and the fine-tuning drive unit is located at the rear end of the cylindrical shell 41 and drivenly connected to the movable plug 42, configured to drive the movable plug 42 to move along the inner cavity of the cylindrical shell 41 to adjust the negative pressure inside the cylindrical shell 41.

[0022] This invention addresses the need for wound drainage devices in low-weight infants and young children with poor wound healing. It minimizes the impact on the child's circulation, effectively isolates the infant's incision from the external environment to prevent infection, promotes granulation tissue growth, and accelerates wound healing.

[0023] like Figure 2 , Figure 3 and Figure 4 As shown, the fine-tuning drive unit includes a motor 43 and an intermediate rod 44. The intermediate rod 44 is circumferentially fixed inside the cylindrical housing 41. The front end of the intermediate rod 44 is axially fixed to the rear end of the movable plug 42. The rear end of the intermediate rod 44 has a threaded hole extending forward along the central axis. The motor 43 is fixedly mounted at the rear end of the cylindrical housing 41, and the motor shaft has an external thread that meshes with the internal thread of the threaded hole. A flange seat is provided at the rear end of the cylindrical housing 41, and the housing of the motor 43 is connected to the flange seat. An exhaust port is provided near the flange seat on the cylindrical housing 41. This configuration eliminates the need for precise manual control of the plunger position, reduces operational difficulty and lowers the requirements for operators. Furthermore, the plunger fluid can maintain a stable position after the operator removes their hand, and the negative pressure value will not change accordingly.

[0024] In some embodiments, the center of the rear end of the movable plug 42 is provided with an axial recess, the bottom of the axial recess is provided with a bottom hole with an enlarged inner diameter, the intermediate rod 44 is inserted into the axial recess, and the front end of the intermediate rod 44 is provided with a column that matches the inner diameter of the bottom hole.

[0025] The outer edge of the movable plug 42 is provided with a sealing ring that mates with the inner cavity of the cylindrical shell 41, or the movable plug 42 is an integral rubber structure.

[0026] In some embodiments, the device further includes a pressure monitor 6, the middle part of the drainage tube 3 is connected to the pressure monitor 6 via a tee fitting 5, for monitoring the negative pressure value generated during operation.

[0027] Furthermore, a pipe clamp is provided between the tee fitting 5 and the fine-tuning negative pressure device 4 in the drainage tube 3, or a switch valve 7 is provided at the front end of the fine-tuning negative pressure device 4 to cut off the airflow and prevent air leakage at the rear end of the drainage tube.

[0028] During implementation, the dressing 1 includes polyethylene alcohol hydrated seaweed salt foam, and the bio-semi-permeable membrane 2 is provided with an adhesive material that adheres to the skin surface on the outer periphery of the dressing 1.

[0029] Instructions for using the provided simple infant incision negative pressure suction device: First, cover or fill the wound with dressing 1 to cover or fill the skin or soft tissue defects.

[0030] Then, the bio-semipermeable membrane 2 is covered on the outer surface of the dressing, and the outer periphery of the bio-semipermeable membrane 2 is adhered to the skin surface to form a closed space containing the dressing 1.

[0031] Then, the front end of the drainage tube 3 is connected to the inside of the biological semi-permeable membrane 2 and to the sealed space, and the fine-tuning negative pressure device 4 is connected to the rear end of the drainage tube 3.

[0032] Finally, the motor shaft of the control motor rotates, and through the meshing relationship between the external thread of the motor shaft and the intermediate rod 44, the intermediate rod 44 is driven to move axially backward. The intermediate rod 44 drives the movable plug 42 to move axially backward, which increases the negative pressure value of the inner cavity of the cylindrical shell 41. The drainage tube 3 is connected to the sealed space, and the negative pressure value of the sealed space inside the biological semi-permeable membrane 2 increases accordingly.

[0033] This invention provides a simple incision negative pressure suction device for infants and toddlers. Through the meshing structure of a threaded hole and an external thread, the rotational motion of the motor shaft of the motor 43 is converted into the axial movement of the movable plug 42. The forward and backward movement of the movable plug 42 is gentle and the position control is precise, eliminating the need for manual dragging of the movable plug 42 and reducing operational difficulty. This operation achieves low negative pressure suction and allows for precise adjustment of the negative pressure within a small range, making it suitable for low-weight infants and toddlers and reducing the impact of negative pressure on their cardiopulmonary circulation.

[0034] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A simple incision negative pressure suction device for infants and young children, characterized in that, include: Dressing (1) is used to cover or fill wounds with skin or soft tissue defects; A bio-semipermeable membrane (2) covers the outer surface of the dressing and adheres to the skin surface on its periphery to form a closed space containing the dressing (1); The drainage tube (3) is connected at its front end to the inside of the bio-semi-permeable membrane (2) and communicates with the sealed space; and The fine-tuning negative pressure device (4) is connected to the rear end of the drainage tube (3) and includes a cylindrical shell (41), a movable plug (42) and a fine-tuning drive unit. The front end of the inner cavity of the cylindrical shell (41) is connected to the drainage tube (3). The movable plug (42) is slidably sealed inside the cylindrical shell (41). The fine-tuning drive unit is located at the rear end of the cylindrical shell (41) and is drivenly connected to the movable plug (42). It is configured to drive the movable plug (42) to move along the inner cavity of the cylindrical shell (41) to adjust the negative pressure in the inner cavity of the cylindrical shell (41).

2. The simple incision negative pressure suction device for infants and young children according to claim 1, characterized in that, The fine-tuning drive unit includes a motor (43) and an intermediate rod (44). The intermediate rod (44) is circumferentially fixed inside the cylindrical housing (41). The front end of the intermediate rod (44) is axially fixed to the rear end of the movable plug (42). The rear end of the intermediate rod (44) is provided with a threaded hole extending forward along the central axis. The motor (43) is fixedly provided at the rear end of the cylindrical housing (41). The motor shaft is provided with an external thread that meshes with the internal thread of the threaded hole.

3. The simple incision negative pressure suction device for infants and young children according to claim 2, characterized in that, The movable plug (42) has an axial recessed hole at its rear end center. The bottom of the axial recessed hole has a bottom hole with an enlarged inner diameter. The intermediate rod (44) is inserted into the axial recessed hole, and the front end of the intermediate rod (44) has a column that matches the inner diameter of the bottom hole.

4. The simple incision negative pressure suction device for infants and young children according to claim 3, characterized in that, The outer edge of the movable plug (42) is provided with a sealing ring that mates with the inner cavity of the cylindrical shell (41), or the movable plug (42) is an integral rubber structure.

5. The simple incision negative pressure suction device for infants and young children according to claim 1, characterized in that, The device also includes a pressure monitor (6), and the middle part of the drainage tube (3) is connected to the pressure monitor (6) via a tee fitting (5).

6. The simple incision negative pressure suction device for infants and young children according to claim 5, characterized in that, The drainage tube (3) is provided with a pipe clamp between the tee fitting (5) and the fine-tuning negative pressure device (4), or the front end of the fine-tuning negative pressure device (4) is provided with a switch valve (7).

7. The simple incision negative pressure suction device for infants and young children according to claim 2 or 4, characterized in that, The cylindrical shell (41) has an axial guide groove (411) extending axially in the middle of its inner cavity, and the intermediate rod (44) is provided with an axial guide block (441) extending axially, and the axial guide block (441) slides in conjunction with the axial guide groove (411).

8. The simple incision negative pressure suction device for infants and young children according to claim 1, characterized in that, The dressing (1) comprises polyethylene alcohol hydrated seaweed salt foam, and the bio-semipermeable membrane (2) is provided with an adhesive material that adheres to the skin surface on the outer periphery of the dressing (1).

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