Intelligent pressure-control and quantity-control skin soft tissue expander adaptive to home scene

Abstract

The invention relates to the field of instruments for inputting a medium into a human body or onto the human body, and discloses an intelligent pressure and quantity control skin soft tissue dilator adaptive to a home scene, which comprises a dilation bag, a catheter connected with the dilation bag, an injection pot connected to the other end of the catheter and a water injection component, and the injection pot is an external injection pot; the water injection assembly comprises an automatic infusion pump, a water injection pipe connected to the automatic infusion pump, a pressure sensor installed on the water injection pipe, a buckle detachably connected to one end of the water injection pipe and a liquid storage bottle connected to the other end of the water injection pipe. The device further comprises a controller, the controller is electrically connected with a control panel, and the pressure sensor and the automatic infusion pump are both electrically connected with the controller. The buckle is a sleeve type buckle, an injection needle is arranged on the inner wall of the buckle and communicated with the water injection pipe, strip-shaped telescopic notches are evenly formed in the side wall of the buckle in the vertical direction, and an elastic connecting piece is connected between the free ends of every two adjacent telescopic notches. By adopting the device, a patient can safely and conveniently inject water at home.

Description

Technical Field

[0001] This invention relates to the field of devices for introducing media into or onto the human body, and specifically to an intelligent pressure- and volume-controlled skin and soft tissue expander adapted for home use, which can be used in the fields of skin treatment and plastic surgery. Background Technology

[0002] Skin and soft tissue expansion is a core technique in plastic surgery for repairing skin scars and defects. It involves implanting a silicone expander sac under the normal skin adjacent to the lesion area, and gradually expanding the local tissue by periodically injecting water, thus increasing the skin area. Ultimately, the expanded autologous skin is used to repair the lesion. This technique is widely used in burn scar repair, congenital skin defect repair, and wound coverage after superficial tumor resection because it preserves the skin's natural color, elasticity, and function to the greatest extent possible. However, existing expander treatment methods have a core drawback—the injection procedure is highly dependent on the hospital setting, placing a heavy burden on patients. From a clinical treatment cycle perspective, expander injection is not a single procedure but must follow a strict "gradual" pattern: the first injection is initiated 1-2 weeks post-surgery after the tissue around the expander has healed. Initially, 10-30ml of saline solution is injected frequently, 1-2 times per day, for 4-8 weeks. After this, a maintenance phase begins, where the injection frequency decreases to 3-5 times per day, but continues until the skin expansion meets the repair needs. Throughout this process, patients need to make 20-30 trips to the hospital, highlighting the significant drawbacks of this frequent visitation. For patients, the time, energy, and financial costs accumulate. Patients living in remote areas may need to travel for several hours to and from the hospital, and the difficulty of accessing medical care is further exacerbated by inclement weather or transportation difficulties. Patients with limited mobility (such as those undergoing lower limb scar repair or elderly patients) require family members to accompany them throughout the process, which not only takes up the family's time but may also affect local tissue recovery due to the bumpy travel. Furthermore, in addition to the cost of each outpatient procedure, the frequent travel, accommodation for patients from other areas, and the hidden costs of family members missing work can accumulate over time and create significant financial pressure on patients' families. Based on considerations of the burden of medical treatment for patients, "patients injecting water at home" has become the core direction for optimizing the treatment model. However, patients lack professional medical knowledge and operational experience, and two major problems are likely to occur when they perform the procedure themselves: First, the amount of water injected is out of control. Insufficient water injection will lead to low expansion efficiency and prolong the treatment cycle, while excessive water injection may rupture the expansion sac or compress surrounding tissues, causing skin ischemia and necrosis. Second, the pressure control is out of balance. If the water injection pressure exceeds the skin's tolerance threshold, it may damage local blood circulation, increase the risk of infection, and in severe cases, even lead to the removal of the expander and treatment failure. Therefore, there is an urgent clinical need for a skin and soft tissue expander that is suitable for home settings, easy to operate, and can precisely control the amount of water injected and the pressure. Summary of the Invention The present invention aims to provide an intelligent pressure and volume control skin soft tissue expander adapted to home scenarios, providing patients with a home-based water injection method, ensuring the convenience and accuracy of home-based water injection, and solving the problems of the inconvenience and high cost of existing technologies that require patients to go to the hospital for water injection.

[0003] To achieve the above objectives, the present invention adopts the following technical solution: This intelligent pressure and volume control skin and soft tissue expander, adapted for home use, includes an expansion sac, a catheter connected to the expansion sac, an injection bottle connected to the other end of the catheter, and a water injection assembly for injecting water into the expansion sac. The injection bottle is external. The water injection assembly includes an automatic infusion pump, a water injection tube connected to the automatic infusion pump, a pressure sensor mounted on the water injection tube, a detachable clip connected to one end of the water injection tube for connecting to the injection bottle, and a reservoir bottle connected to the other end of the water injection tube. It also includes a controller, which is electrically connected to a control panel. The pressure sensor and the automatic infusion pump are both electrically connected to the controller. The clip is a sleeve-type clip with an injection needle on its inner wall, which communicates with the water injection tube. The clip has evenly spaced vertical telescopic notches on its side wall, and an elastic connector connects the free ends of two adjacent telescopic notches.

[0004] Preferably, as an improvement, the controller is electrically connected to an alarm.

[0005] Preferably, as an improvement, the control panel is equipped with a QR code, which is pre-encoded with access information for obtaining teaching videos. The access information can be scanned and decoded by a terminal device to trigger the retrieval of the teaching videos.

[0006] Preferably, as an improvement, a protective component is provided on the outside of the injection needle.

[0007] Preferably, as an improvement, the protective component includes an elastic protective sleeve that covers the injection needle. The top of the elastic protective sleeve is fixed to the inner wall of the top of the buckle, and a protective head is fixed to the bottom of the elastic protective sleeve. The protective head has a through hole in the middle that allows the injection needle to pass through. Two sliding tabs are slidably connected to the through hole. The two sliding tabs are slidably connected to a groove inside the protective head. A reset element is connected between the two sliding tabs and the groove. A guide structure for guiding the protective head is provided inside the buckle.

[0008] Preferably, as an improvement, the top of both sliding latches is provided with a guide slope, and the lower ends of both guide slopes are located at the free end.

[0009] Preferably, as an improvement, the guide structure includes support slides uniformly connected around the circumference of the protective head, with the free end of the support slides slidably connected to the inner wall of the buckle.

[0010] Preferably, as an improvement, the reset element is a spring.

[0011] Preferably, as an improvement, the clamp is threaded to the water injection pipe.

[0012] Preferably, as an improvement, the end of the water injection tube used for connecting the buckle is provided with an external thread, the top of the buckle is provided with a connection port, the connection port is connected to the injection needle, the inner wall of the connection port is provided with an internal thread that meshes with the external thread, and the water injection tube is detachably connected to a sealing plug through the external thread.

[0013] The principles and beneficial effects of this solution are as follows: 1. Traditional expander therapy requires patients to make frequent trips to the hospital, and is limited by outpatient hours and medical resources. This solution addresses this by establishing a "home-based self-treatment" approach. This model completely solves this pain point: patients only need to scan a QR code with a terminal (such as a mobile phone) to obtain professional medical operation guidance videos containing key points of puncture and water injection steps. They can not only complete the self-injection at home in a standardized manner under the intuitive guidance of the video, but also learn how to observe the skin tension, color changes and other reactions in the dilated area after water injection, and identify abnormalities in time. During the water injection operation, patients can accurately set the water volume and water injection speed on the control panel according to the doctor's orders. The automatic infusion pump stably executes the water injection process without manual control. At the same time, the pressure sensor monitors the pressure inside the dilation sac in real time and dynamically adjusts it. With the pressure over-limit alarm, it will issue a timely warning, effectively avoiding the dilation sac rupture and leakage due to excessive pressure, and realizing damage protection of the dilator from the operation level. In addition, the solution adopts an external injection chamber design, which not only allows patients to easily perform puncture and water injection at home without relying on professional positioning, but also fundamentally avoids the problem of the internal injection chamber flipping over due to movement and changes in tissue tension in the body, which would cause puncture failure and water injection interruption. Through the above design, patients are freed from the time, energy, and financial costs of frequent trips to the hospital. With multiple safeguards such as "video guidance + precise volume and pressure control + external anti-tipping", the safety, standardization, and therapeutic effect of home water injection are ensured, significantly improving the patient's treatment experience and expansion efficiency.

[0014] 2. The injection needle is housed within the snap fastener. When the snap fastener aligns with the injection vessel, no additional adjustment of the puncture angle is required. The snap fastener's engagement action allows the injection needle to be directly and accurately inserted into the injection vessel, eliminating the traditional steps of manual alignment and slow puncture. This achieves a quick "connection and puncture" connection, significantly reducing the difficulty for patients performing the procedure at home. Simultaneously, the snap fastener features a vertical telescopic notch on its side wall, with an elastic connector at the free end. This design gives the snap fastener an adaptive adjustment capability similar to an "umbrella opening and closing"—during alignment, the snap fastener flexibly opens to fit the shape of the injection vessel, easily accommodating injection vessels of different sizes. After insertion, the elastic connector automatically retracts at the bottom of the snap fastener, forming a ring-shaped tightening force that firmly secures the snap fastener to the injection vessel surface. This effectively prevents the snap fastener from shifting or falling off due to slight hand movement or injection pressure impact during the injection process, ensuring a stable puncture state and further guaranteeing the smoothness and safety of the injection operation.

[0015] 3. By embedding the injection needle within the clip, compared to traditional exposed designs, external contact is effectively isolated, reducing the risk of accidental puncture wounds when not in use. Simultaneously, the clip contains a protective head slidably connected via a support rod. An elastic protective sleeve connects the protective head to the top of the clip. Two opposing sliding tabs are slidably mounted within a groove on the inner side of the protective head. When the clip engages with the injection vessel, the injection vessel exerts an upward pushing force on the protective head, causing it to slide upwards along the support rod within the clip. The elastic protective sleeve then folds and compresses upwards. During this process, the injection needle follows the guide angle at the top of the two sliding tabs. When the needle passes through, the two latches naturally open to the sides, allowing the injection needle to be automatically exposed for puncture and injection. After use, once the latches separate from the syringe, the protective head slides down along the support rod under its own weight and the restoring force of the elastic protective sleeve. Simultaneously, the elastic protective sleeve unfolds downwards, re-covering the injection needle. Together with the outer latches, this forms a dual protective structure of "protective head + latches," which not only avoids accidental punctures caused by the exposed injection needle after use but also prevents the risk of punctures to medical staff and cleaning personnel during disposal (such as when handling medical waste), further improving the safety of home operation and subsequent handling.

[0016] 4. The buckle and water injection pipe are connected by threads for a detachable design. This structure not only ensures the tightness and stability of the connection, preventing loosening or leakage due to pressure fluctuations during water injection, but also makes disassembly and assembly simple and convenient, requiring no additional tools for manual tightening or disassembly. When the buckle is no longer needed and needs to be removed and discarded, the matching sealing plug can be screwed onto the water injection pipe interface to form a reliable seal. This prevents external dust, bacteria, and other contaminants from entering the water injection pipe and causing contamination, and also prevents leakage of residual liquid inside the pipe. This provides clean and safe protection for the storage and future use of the water injection pipe, further improving the ease of use and hygiene safety of the entire device. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention.

[0018] Figure 2 This is a circuit connection diagram of Embodiment 1 of the present invention.

[0019] Figure 3 This is a schematic diagram of the buckle structure in Embodiment 1 of the present invention.

[0020] Figure 4 This is a schematic diagram of the engagement of the buckle and the injection vessel in Embodiment 1 of the present invention.

[0021] Figure 5 This is a longitudinal sectional view of the buckle in Embodiment 2 of the present invention.

[0022] The reference numerals in the accompanying drawings include: 1. dilator 2. catheter 3. syringe 3. buckle 4. water injection tube 5. pressure sensor 6. automatic infusion pump 7. reservoir 8. injection needle 9. telescopic notch 10. elastic connector 11. elastic protective sleeve 12. guide slope 13. protective head 14. sliding latch 15. reset piece 16. support slide rod 17. through hole 18. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the embodiments. Example 1 like Figure 1 As shown, the intelligent pressure and volume control skin soft tissue expander adapted for home use includes an expansion sac 1, a catheter 2 connected to the expansion sac 1, an injection bottle 3 connected to the other end of the catheter 2, and a water injection component for injecting water into the expansion sac 1. The injection bottle 3 is an external injection bottle 3.

[0024] Combination Figure 2 , Figure 3 and Figure 4As shown, the water injection assembly includes an automatic infusion pump 7, an injection pipe 5 connected to the outlet of the automatic infusion pump 7, a pressure sensor 6 mounted on the injection pipe 5, a snap fastener 4 detachably threaded to one end of the injection pipe 5 for connection to the syringe 3, and a storage bottle 8 fixedly connected to the other end of the injection pipe 5. The storage bottle 8 is used to hold physiological saline for water injection. The outer wall of the end of the injection pipe 5 used to connect to the snap fastener 4 has external threads. In this embodiment, the snap fastener 4 is a sleeve-type snap fastener 4. A connection port is opened at the top of the snap fastener 4, and an injection needle 9 is fixed to the top of the inner wall of the snap fastener 4. The connection port communicates with the injection needle 9. An internal thread that meshes with the external thread is machined on the inner wall of the connection port. The snap fastener 4 is detachably connected to the external thread on the injection pipe 5 through the internal thread on the connection port. Additionally, the injection pipe 5 can also be detachably connected to a sealing plug through the external thread. The buckle 4 has vertically evenly spaced telescopic notches 10 on its side wall. An elastic connector 11 is connected between the free ends of two adjacent telescopic notches 10. The elastic connector 11 can be made of elastic rope or rubber rope, etc.

[0025] The water injection assembly also includes a controller, which is electrically connected to a control panel and an alarm. Pressure sensor 6 and automatic injection pump 7 are both electrically connected to the controller. A QR code is provided on the control panel, pre-encoded with access information for retrieving instructional videos. This access information can be scanned and decoded by a terminal device to trigger the retrieval of the instructional videos.

[0026] Working principle: In practical use, scan the QR code on the control panel with your mobile phone to obtain a professional water injection guidance video and follow the instructions. Specifically, after disinfecting the injection bottle 3, the affected area, and other areas requiring disinfection according to the guidance video, take a separately packaged sterile buckle 4, disinfect your hands, and tighten the buckle 4 onto the water injection tube 5. Then, vertically snap the buckle 4 onto the injection bottle 3. During the snapping process, the side wall of the buckle 4 can adapt to the shape and size of the injection bottle 3 through the telescopic notch 10 and the elastic connector 11, thus smoothly fitting onto the injection bottle 3. Under the contraction action of the elastic connector 11, it firmly tightens the injection bottle 3, allowing the buckle 4 to be stably connected to the injection bottle 3. After connection, pour the saline solution into the reservoir bottle 8. The reservoir bottle 8 has a cap; simply open the cap to pour in the saline solution. Then, according to the doctor's orders, the volume, speed and pressure of the water injection are set on the control panel. The device is then started to inject water automatically. The pressure sensor 6 monitors the water injection pressure in real time. When the pressure exceeds the preset range, a signal is sent to the controller. The controller controls the automatic infusion pump 7 to adjust the water injection pressure and at the same time controls the alarm to sound an alarm. The patient can adjust the water injection parameters appropriately on the control panel.

[0027] Example 2 like Figure 5As shown, the difference between this embodiment and Embodiment 1 is that a protective component is provided outside the injection needle 9. The protective component includes an elastic protective sleeve 12 that covers the injection needle 9. The top end of the elastic protective sleeve 12 is glued and fixed to the inner wall of the top of the buckle 4. A protective head 14 is fixed to the bottom of the elastic protective sleeve 12. A through hole 18 is opened in the middle of the protective head 14 to allow the injection needle 9 to pass through. Two sliding latches 15 are slidably connected to the through hole 18. The two sliding latches 15 are slidably connected to a groove opened inside the protective head 14. A reset member 16 is connected between the two sliding latches 15 and the groove. The reset member 16 is a spring. A guide structure is provided inside the buckle 4 to guide the protective head 14. The guide structure includes a support slide rod 17 evenly connected around the circumference of the protective head 14. The free end of the support slide rod 17 is slidably connected to the inner wall of the buckle 4. Each of the two sliding latches 15 has a guide ramp 13 at its top, with the lower ends of both guide ramps 13 located at their free ends. This creates a V-shaped space for the injection needle 9 to be inserted when the two sliding latches 15 are brought together, facilitating the insertion of the injection needle 9 between the two sliding latches 15. It should be noted that the buckle 4 and the protective components are made of disposable medical-grade plastic material to reduce overall cost and meet the requirement of single-use of the buckle 4.

[0028] Working principle: During the process of the buckle 4 being pressed down onto the injection vessel 3, the protective head 14 first contacts the injection vessel 3. As the buckle 4 continues to press down, the protective head 14 moves towards the top of the buckle 4 under the reaction force of the injection vessel 3 pushing upward. At this time, the elastic protective sleeve 12 is compressed and folded, and the injection needle 9 passes through the guide slope 13 at the top of the two sliding tabs 15, forcing the two sliding tabs 15 to separate to both sides, thereby automatically exposing the injection needle 9, allowing the injection needle 9 to smoothly puncture into the injection vessel 3. After water injection is completed and the buckle 4 separates from the injection vessel 3, the protective head 14 moves down and resets under the action of gravity and the elastic reset action of the elastic protective sleeve 12. The elastic protective sleeve unfolds and covers the injection needle 9 again, realizing the automatic coverage of the injection needle 9.

[0029] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A smart pressure and volume control skin soft tissue expander adapted for home use, characterized by: The device includes an expansion sac, a catheter connected to the expansion sac, an injection vessel connected to the other end of the catheter, and an injection assembly for injecting water into the expansion sac. The injection vessel is an external injection vessel. The injection assembly includes an automatic infusion pump, an injection tube connected to the automatic infusion pump, a pressure sensor mounted on the injection tube, a clip detachably connected to one end of the injection tube for connection to the injection vessel, and a reservoir connected to the other end of the injection tube. The device also includes a controller, which is electrically connected to a control panel. The pressure sensor and the automatic infusion pump are both electrically connected to the controller. The clip is a sleeve-type clip, with an injection needle on its inner wall. The injection needle communicates with the injection tube. The clip has evenly spaced vertical telescopic notches on its side wall, and an elastic connector connects the free ends of two adjacent telescopic notches.

2. The intelligent pressure and volume control skin soft tissue expander adapted for home scenarios according to claim 1, characterized in that: The controller is electrically connected to an alarm.

3. The intelligent pressure and volume control skin soft tissue expander adapted for home scenarios according to claim 2, characterized in that: The control panel has a QR code pre-encoded with access information for obtaining instructional videos. This access information can be scanned and decoded by a terminal device to trigger the retrieval of the instructional videos.

4. The intelligent pressure- and volume-controlled skin soft tissue expander adapted for home use according to any one of claims 1-3, characterized in that: The injection needle is equipped with a protective component.

5. The intelligent pressure and volume control skin soft tissue expander adapted to home scenarios according to claim 4, characterized in that: The protective assembly includes an elastic protective sleeve that covers the injection needle. The top of the elastic protective sleeve is fixed to the inner wall of the top of the buckle. A protective head is fixed to the bottom of the elastic protective sleeve. The protective head has a through hole in the middle that allows the injection needle to pass through. Two sliding tabs are slidably connected to the through hole. The two sliding tabs are slidably connected to a groove inside the protective head. A reset element is connected between the two sliding tabs and the groove. A guide structure is provided inside the buckle to guide the protective head.

6. The intelligent pressure and volume control skin soft tissue expander adapted to home scenarios according to claim 5, characterized in that: The top of each of the two sliding latches is provided with a guide ramp, and the lower ends of the two guide ramps are located at the free end.

7. The intelligent pressure and volume control skin soft tissue expander adapted to home scenarios according to claim 6, characterized in that: The guide structure includes support slide rods evenly connected around the circumference of the protective head, with the free end of the support slide rods slidably connected to the inner wall of the buckle.

8. The intelligent pressure and volume control skin soft tissue expander adapted to home scenarios according to claim 7, characterized in that: The reset component uses a spring.

9. The intelligent pressure and volume control skin soft tissue expander adapted to home scenarios according to claim 8, characterized in that: The clamp head is threadedly connected to the water injection pipe.

10. The intelligent pressure and volume control skin soft tissue expander adapted to home scenarios according to claim 9, characterized in that: The water injection tube has an external thread at one end for connecting the buckle, and a connection port at the top of the buckle. The connection port communicates with the injection needle, and an internal thread that meshes with the external thread is provided on the inner wall of the connection port. The water injection tube is detachably connected to a sealing plug through the external thread.

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