Passive pressure sore prevention mattress based on multi-cavity interconnected slow-release structure

Abstract

The invention discloses a passive pressure sore prevention mattress based on a multi-chamber interconnected slow-release structure, and belongs to the technical field of medical care instruments, the passive pressure sore prevention mattress comprises a core functional layer, the core functional layer is internally provided with a plurality of closely arranged flexible chambers, and the flexible chambers are filled with fluid; the adjacent flexible cavities are communicated through the throttling holes; the throttling holes are used for generating flow resistance to fluid flowing through the throttling holes, so that the fluid slowly flows between the interconnected flexible cavities, and dynamic slow release and redistribution of local pressure are achieved. According to the invention, passive intelligence can be realized without electric power, a pump machine or an electronic controller.

Description

Technical Field

[0001] This invention belongs to the field of medical and nursing device technology, specifically relating to a passive pressure ulcer prevention mattress based on a multi-chamber interconnected slow-release structure. Background Technology

[0002] In existing technologies, pressure ulcer prevention for long-term bedridden patients mainly involves two approaches: static support and dynamic alternating pressure. However, both have inherent drawbacks. Static support primarily relies on the deformation of materials such as sponge, memory foam, and static air cushions to distribute pressure. Its inherent limitation is that it cannot change the fundamental pathological state of "continuous pressure." Once the patient's position is fixed, the pressure distribution also becomes fixed, and persistent high-pressure points remain in bony prominences such as the hip, tailbone, and heel, leading to circulatory disorders and poor prevention for high-risk patients. Dynamic alternating pressure (such as electrically operated alternating air mattresses) primarily uses an air pump and control system to periodically inflate and deflate a set of airbags to alternate the supported areas. While theoretically breaking the cycle of continuous pressure, this system introduces new and significant drawbacks: it requires a continuous external power supply, and its core functions are immediately lost in the event of power outages, movement, or equipment malfunction (such as the air pump or control system), posing a safety hazard. The continuous operation of the motor and air pump generates audible noise and mechanical vibration, severely interfering with the rest quality of patients (especially those with light sleep or neurasthenia), failing to meet high-quality medical care standards. The pressure changes are proactive, periodic, and clearly perceptible to patients; this "mechanical" intervention can cause discomfort, anxiety, and even sleep disturbances in sensitive patients. Furthermore, the system integrates multiple precision components such as air pumps, solenoid valves, sensors, and controllers, resulting in high manufacturing, acquisition, and maintenance costs, limiting its widespread application. Summary of the Invention

[0003] To solve the above problems, the present invention adopts the following technical solution: A passive pressure ulcer prevention mattress based on a multi-chamber interconnected slow-release structure includes a mattress body, which comprises, from bottom to top, a base support layer, a core functional layer and a comfort dispersion layer. The core functional layer has multiple closely arranged flexible chambers, and the flexible chambers are filled with fluid. The adjacent flexible chambers are connected by throttling orifices; the throttling orifices are used to create flow resistance to the fluid flowing through them, thereby allowing the fluid to flow slowly between the interconnected flexible chambers to achieve dynamic release and redistribution of local pressure.

[0004] Furthermore, the flexible chambers are arranged in a regular hexagonal honeycomb pattern.

[0005] Furthermore, the width of the flexible chamber is 3-5 cm.

[0006] Furthermore, the throttling orifice is a micro Venturi tube structure with an internal aperture that gradually narrows and then expands.

[0007] Furthermore, the throttling orifice is a capillary tube with a length of 5-10 mm and a diameter of 0.5-1.0 mm.

[0008] Furthermore, the core functional layer is divided into multiple independent pressure zones along the longitudinal direction, and adjacent pressure zones are connected by connecting pipes with adjustable flow valves.

[0009] Furthermore, the flexible chamber is made of an elastic thin film material.

[0010] Furthermore, the elastic film material is thermoplastic polyurethane.

[0011] Furthermore, the fluid is air or gel.

[0012] Beneficial effects: 1. Completely passive operation: No electricity, pumps, or electronic controllers are required, achieving "passive" intelligence.

[0013] 2. Gentle adjustment process: The pressure change process is slow, subtle and continuous, almost imperceptible to the patient, and will not cause discomfort or wakefulness, providing excellent comfort.

[0014] 3. Simple and reliable structure: It eliminates complex electromechanical components, reducing failure rate, manufacturing cost and maintenance threshold.

[0015] 4. Simulate physiological micro-movements: Break the "continuous pressure" by simulating the unconscious "micro-turning" behavior of healthy people during sleep, fundamentally eliminating the conditions for pressure sores to form. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the mattress body of the present invention; Figure 2 This is a schematic diagram of the core functional layer of the present invention; Figure 3 This is an enlarged view of point A in this invention; Explanation of reference numerals in the attached diagram: 1. Basic support layer; 2. Core functional layer; 21. Flexible chamber; 22. Throttling orifice; 3. Comfort dispersion layer; 4. Head and shoulder area; 5. Trunk area; 6. Hips and legs area; 7. Heel area. Detailed Implementation

[0017] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0018] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and 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 limiting this invention.

[0019] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0020] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0021] Example 1

[0022] refer to Figure 1-3 A passive pressure ulcer prevention mattress based on a multi-chamber interconnected slow-release structure includes a mattress body, which from bottom to top includes: a basic support layer 1, a core functional layer 2 and a comfort dispersion layer 3. The core functional layer 2 is provided with multiple closely arranged flexible chambers 21, and the flexible chambers 21 are filled with fluid. Adjacent flexible chambers 21 are connected by throttling orifices 22; the throttling orifices 22 are used to create flow resistance to the fluid flowing through them, so that the fluid flows slowly between the interconnected flexible chambers 21 to achieve dynamic release and redistribution of local pressure.

[0023] Preferably, the flexible chambers 21 are arranged in a regular hexagonal honeycomb pattern.

[0024] Preferably, the width of the flexible chamber 21 is 3-5 cm.

[0025] Preferably, the throttling orifice 22 is a micro Venturi tube structure with a gradually decreasing and then gradually expanding internal aperture.

[0026] Preferably, the flexible chamber 21 is made of an elastic thin film material.

[0027] Preferably, the elastic film material is thermoplastic polyurethane.

[0028] Preferably, the fluid is air or gel.

[0029] Example 2

[0030] A passive pressure ulcer prevention mattress based on a multi-chamber interconnected slow-release structure includes a mattress body, which from bottom to top includes: a basic support layer 1, a core functional layer 2, and a comfort dispersion layer 3. The core functional layer 2 is provided with multiple closely arranged flexible chambers 21, and the flexible chambers 21 are filled with fluid. Adjacent flexible chambers 21 are connected by throttling orifices 22; the throttling orifices 22 are used to create flow resistance to the fluid flowing through them, so that the fluid flows slowly between the interconnected flexible chambers 21 to achieve dynamic release and redistribution of local pressure.

[0031] Preferably, the flexible chambers 21 are arranged in a regular hexagonal honeycomb pattern.

[0032] Preferably, the width of the flexible chamber 21 is 3-5 cm.

[0033] Preferably, the throttling orifice 22 is a micro Venturi tube structure with a gradually decreasing and then gradually expanding internal aperture.

[0034] Preferably, the flexible chamber 21 is made of an elastic thin film material.

[0035] Preferably, the elastic film material is thermoplastic polyurethane.

[0036] Preferably, the fluid is air or gel.

[0037] Example 3

[0038] This embodiment is a further modification based on embodiment 1 or embodiment 2.

[0039] Preferably, the core functional layer 2 is divided into multiple independent pressure zones along the longitudinal direction, and adjacent pressure zones are connected by connecting pipes with adjustable flow valves.

[0040] In this embodiment, the entire core functional layer 2 is vertically divided into four air pressure zones: head and shoulder zone 4, torso zone 5, hip and leg zone 6, and heel zone 7. Adjustable flow valves (not shown separately in the figure) are installed on the connecting pipes between the zones, which can be used to fine-tune the fluid exchange characteristics between different zones.

[0041] Working principle: When the patient's sacrococcygeal region is subjected to continuous pressure, the flexible chamber 21 beneath this area is compressed, increasing the internal air pressure. High-pressure air flows slowly through the orifice 22 to the chambers in the lower back and thigh areas where pressure is lower (e.g., it takes 10-30 seconds to complete one pressure equalization). This causes the support stiffness of the sacrococcygeal region to decrease slowly (pressure relief), while the support force in the surrounding areas gradually increases, achieving a dynamic redistribution of pressure. This process occurs continuously throughout the body with each breath and minute movement of the patient.

[0042] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A passive pressure ulcer prevention mattress based on a multi-chamber interconnected slow-release structure, comprising a mattress body, wherein the mattress body comprises, from bottom to top: The basic support layer, the core functional layer, and the comfort dispersion layer are characterized in that the core functional layer is provided with a plurality of closely arranged flexible chambers, and the flexible chambers are filled with fluid; The adjacent flexible chambers are connected by throttling orifices; the throttling orifices are used to create flow resistance to the fluid flowing through them, thereby allowing the fluid to flow slowly between the interconnected flexible chambers to achieve dynamic release and redistribution of local pressure.

2. A passive pressure ulcer prevention mattress based on a multi-chamber interconnected slow-release structure according to claim 1, characterized in that, The flexible chambers are arranged in a regular hexagonal honeycomb pattern.

3. A passive pressure ulcer prevention mattress based on a multi-chamber interconnected slow-release structure according to claim 2, characterized in that, The width of the flexible chamber is 3-5 cm.

4. A passive pressure ulcer prevention mattress based on a multi-chamber interconnected slow-release structure according to claim 1, characterized in that, The throttling orifice is a micro Venturi tube structure with an internal diameter that gradually decreases and then gradually increases.

5. A passive pressure ulcer prevention mattress based on a multi-chamber interconnected slow-release structure according to claim 1, characterized in that, The throttling orifice is a capillary tube with a length of 5-10 mm and a diameter of 0.5-1.0 mm.

6. A passive pressure ulcer prevention mattress based on a multi-chamber interconnected slow-release structure according to claim 1, characterized in that, The core functional layer is divided into multiple independent pressure zones along the longitudinal direction, and adjacent pressure zones are connected by connecting pipes with adjustable flow valves.

7. A passive pressure ulcer prevention mattress based on a multi-chamber interconnected slow-release structure according to claim 1, characterized in that, The flexible chamber is made of an elastic thin film material.

8. A passive pressure ulcer prevention mattress based on a multi-chamber interconnected slow-release structure according to claim 6, characterized in that, The elastic film material is thermoplastic polyurethane.

9. A passive pressure ulcer prevention mattress based on a multi-chamber interconnected slow-release structure according to claim 1, characterized in that, The fluid is air or gel.

Images