Expandable Compression Bandage for Hemostasis via Solvent Swelling
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Solution Overview
Problem
Existing compression bandages for hemostasis are ineffective in achieving a strong hemostatic effect, especially for low bleeding sites like venous blood bleeding, and pose hygiene risks and increased chances of edema and infection.
Innovation Solution
An expandable compression bandage with a solvent storage part and an expandable part, where the expandable part is swollen and expanded by absorbing a swelling solvent, providing increased hemostatic compression force and allowing for visual monitoring of hemostatic compression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a compressed nonwoven fabric is used to absorb blood and expand for hemostasis, then the hemostatic function is improved, but the expansion pressure is weak or insignificant when blood amount is zero or small
Solution Approach 1:
The patent pre-fills the compressed nonwoven fabric with a swelling solvent (water or saline) before application. This preliminary action ensures that when the bandage is applied to a bleeding site, the fabric can immediately expand to provide sufficient compression pressure even when blood volume is minimal or zero, thereby maintaining reliable hemostatic function across all bleeding scenarios.
2Reliability
If the compressed nonwoven fabric absorbs blood to expand, then hemostasis is achieved, but hygiene is compromised and edema/infection risk increases
Solution Approach 1:
The patent converts the potentially harmful direct contact between blood and the nonwoven fabric into a beneficial indirect contact system. The swelling solvent acts as an intermediary that absorbs the blood while the nonwoven fabric expands to provide compression. This separation maintains hygiene by preventing blood contamination of the fabric structure, thereby reducing edema and infection risks while preserving the hemostatic compression effect.
3Reliability
If hand pressure is applied continuously for 30 minutes to one hour for hemostasis, then hemostatic effect is achieved, but it is difficult for patients to maintain and time-consuming
Solution Approach 1:
The patent transforms the hemostasis process from a manual, time-consuming activity requiring continuous patient effort into a self-service system. The pre-filled compressed nonwoven fabric automatically expands upon contact with blood or swelling solvent, providing sustained compression pressure without requiring continuous hand pressure from the patient. This self-expanding mechanism achieves reliable hemostasis while dramatically reducing the time and effort required from the patient.
4Force
If the elastic nonwoven fabric is stretched by the expanded compressed fabric, then hemostatic compression is achieved, but the compression force is insufficient for low bleeding sites
Solution Approach 1:
The patent fundamentally changes the parameter driving compression force from elastic material properties to volumetric expansion. By pre-filling the nonwoven fabric with a large volume of swelling solvent, the fabric can expand significantly to generate high compression pressure that adapts to different bleeding sites and blood volumes. This parameter change from elastic stretch to swelling expansion provides sufficient compression force for both high and low bleeding sites, enhancing versatility across different应用场景.
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 bandage achieves a strong hemostatic effect with a single press, effectively managing low bleeding sites and improving hygiene by separating blood and solvent, while reducing the risk of edema and infection.
Implementation Method 1
the expandable part is swollen and expanded when the swelling solvent stored in the solvent storage part is absorbed thereinto
Implementation Method 2
the expandable part is configured to be disposed beneath the solvent storage part; and wherein the expandable part is swollen and expanded when the swelling solvent stored in the solvent storage part is absorbed thereinto
Data Source
AI summary
The present invention is directed to an expandable compression bandage. The expandable compression bandage includes: an adhesive bandage part; and a pressing part including a solvent storage part and an expandable part. The solvent storage part is configured to be attached to a part of an adhesive surface of the adhesive bandage part and to store a swelling solvent, and the expandable part is configured to be disposed beneath the solvent storage part. The expandable part is swollen and expanded when the swelling solvent stored in the solvent storage part is absorbed thereinto.