Body Fluid Collection Bag Structure for Curved-Surface Adhesion
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Solution Overview
Problem
Existing body fluid collection devices face issues such as adhesive strength degradation, difficulty in adhering to non-flat surfaces, and fluid infiltration into the adhesive, leading to device detachment and contamination.
Innovation Solution
A body fluid collection device with a multi-layered structure comprising sheets with adhesive layers and notches, designed to fit curved surfaces, resist detachment, and prevent fluid ingress, featuring elastic materials and optional support structures to maintain adhesion and prevent leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a needleless catheter device is used to reduce pain and trauma, then patient comfort is improved, but the device becomes more complex requiring additional components like adapters and hubs
Solution Approach 1:
The patent combines the adapter and hub into a single integrated component that receives the needleless catheter and connects to the fluid collection bag. This merging eliminates the need for separate adapter and hub components, reducing device complexity while maintaining the needleless functionality that improves patient comfort.
Solution Approach 2:
The integrated adapter-hub component serves multiple functions: it receives the needleless catheter, provides a connection interface for the fluid collection bag, and maintains sterile barrier functionality. This multi-functionality reduces the number of separate components needed, simplifying the overall device structure while preserving the beneficial needleless design.
2Ease of operation
If traditional IV catheterization procedure is used, then the procedure is simple and quick, but it causes pain, trauma, and risk of infection to the patient
Solution Approach 1:
The patent extracts and eliminates the needle component from the traditional IV catheterization procedure, retaining only the beneficial aspects of catheter insertion. This removal of the harmful needle element reduces pain and trauma while the remaining catheter insertion procedure remains relatively simple and quick to perform.
Solution Approach 2:
The needleless catheter system uses disposable components including the catheter itself and sterile barriers that are discarded after single use. This approach eliminates infection risks associated with needle reuse while maintaining procedural simplicity, as each disposable component is pre-prepared and requires no complex setup or sterilization procedures.
3Reliability
If IV catheterization is performed to administer fluids and medications, then patient treatment is effective, but it creates access points for pathogens and risk of contamination
Solution Approach 1:
The patent introduces sterile barriers as intermediary components between the external environment and the patient's bloodstream. These barriers (including sterile caps and seals) act as mediators that prevent pathogen access while allowing the necessary fluid and medication administration to proceed, thus maintaining treatment effectiveness while eliminating contamination risks.
Solution Approach 2:
The system employs self-sealing mechanisms and automatic closure features where the catheter access point automatically seals when not in use or when disconnected. This self-service functionality continuously protects against pathogen access without requiring constant manual intervention, maintaining both treatment effectiveness and contamination prevention.
Data Source
Figure 1~2C
Figure 3A~3B
Figure 4A~5A
AI summary
A body fluid collection device (10), comprising: a first sheet (11) that is provided with a first opening (12) and that comprises a first surface (S1) and a second surface (S2), the first surface (S1) being provided with an adhesive layer (13); a second sheet (21) that is provided with a second opening (22) and that comprises a third surface (S3) and a fourth surface (S4), the third surface (S3) and the second surface (S2) being interconnected with a first closed strip-shaped region (1121); a third sheet (31) that comprises a fifth surface (S5) and a sixth surface (S6), the second sheet (21) and the third sheet (31) being interconnected with a second closed strip-shaped region (2131) so as to form a bag body. The body fluid collection device may be used for collecting different body fluids, thus solving problems such as milk leakage and urine leakage for a user.