Manual Wound Drainage Pump for Portable Negative Pressure Therapy
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Solution Overview
Problem
Existing wound treatment devices used in negative pressure wound therapy require a power source, are heavy, and restrict patient mobility due to their size and weight, limiting their use and increasing patient burden.
Innovation Solution
A wound treatment device utilizing a manual suction pump with a transfer tube and a manual pump that creates negative pressure through elastic recovery, allowing for exudate suction and discharge without a power source, featuring a detachable connection system and a lightweight design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a vacuum pump is used to provide strong suction force, then the suction capability is improved, but the device requires a power source and becomes heavy and bulky
Solution Approach 1:
The patent removes the vacuum pump (power source) from the system entirely, extracting only the essential function of creating negative pressure. This is achieved by using a simple container where negative pressure is generated manually or passively, eliminating the heavy mechanical pump while maintaining the core suction capability needed for wound therapy.
Solution Approach 2:
The complex mechanical vacuum pump system is replaced with a simpler container-based system. The negative pressure generation mechanism is substituted from an active mechanical pump to a passive or manually-operated container system, dramatically reducing weight and complexity while preserving the therapeutic function.
2Force
If a vacuum pump is used to provide strong suction force, then the suction capability is improved, but the device size becomes bulky
Solution Approach 1:
The vacuum pump is extracted from the system, removing the bulky mechanical components. The remaining container system is significantly more compact, allowing portable use without restricting patient movement while maintaining adequate suction force for wound therapy.
Solution Approach 2:
The large mechanical vacuum pump is replaced with a compact container system. This substitution reduces the device volume from bulky pump dimensions to a manageable container size that can be easily transported and used at the patient's bedside or even taken home.
3Force
If a power source is required for the vacuum pump, then the suction capability is maintained, but the device complexity increases
Solution Approach 1:
The power source and associated electrical systems are extracted from the device. The container-based system operates without electricity, eliminating complex wiring, power management, and control systems while maintaining the essential negative pressure function through simpler mechanical or manual means.
Solution Approach 2:
The electromechanical vacuum pump system is replaced with a mechanically-simple or manually-operated container system. This substitution eliminates the need for power sources, control circuits, and electronic components, dramatically simplifying the overall device architecture while preserving therapeutic effectiveness.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device provides effective wound healing by continuously suctioning exudate without restricting patient mobility, reducing treatment duration, and minimizing the need for device replacement, thus lowering patient burden and cost.
Implementation Method 1
an accommodation part that creates a negative pressure in the internal space by elastic recovery after deformation due to external pressure
Data Source
Figure 1~2A
Figure 2B~2C
Figure 3
AI summary
A wound treatment device (1) includes: a transfer tube (2) that has one end portion (2a1) which is inserted into a body of a patient and that transfers exudate generated inside the body to an outside of the body; and a manual suction pump (3) that is connected to the other end portion (2b2) of the transfer tube (2) outside the body and that suctions the exudate into an inside thereof through the transfer tube (2), in which the suction pump (3) includes an accommodation part (3a) that creates a negative pressure in the internal space by elastic recovery after deformation due to external pressure, and that suctions and accommodates the exudate in the body into the internal space through the transfer tube (2), a discharge part (3b) that is provided to be openable and closable and that is capable of discharging a fluid in the internal space of the accommodation part (3a), and a check valve (3c) that is provided at a connection location with the transfer tube (2) and that prevents a backflow of the fluid from the internal space of the accommodation part (3a) to the transfer tube (2), a flow path for the exudate is formed in the transfer tube (2), and a first opening portion accessible to the flow path is formed in addition to an end portion opening formed in each of the one end portion (2a1) and the other end portion (2b2) of the transfer tube (2).