Two-Chamber Surgical Applicator with Barrier Mixing
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Solution Overview
Problem
Conventional surgical prep applicators face challenges in incorporating dye additives or other components into pre-loaded liquid containers due to chemical interactions and sterilization issues, leading to non-uniform mixing and assembly problems.
Innovation Solution
A two-chamber container design with a liquid-impermeable barrier allows for separate handling and mixing of disinfectant and additive materials, using a pusher mechanism to open the intermediate barrier and promote mixing before flow to the applicator pad, and optional baffle structures for enhanced mixing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If dye additive is pre-packaged with disinfectant solution in the container, then uniform mixing is achieved, but chemical degradation occurs over time and sterilization becomes difficult
Solution Approach 1:
The container is divided into two separate chambers: a first chamber for the disinfectant solution and a second chamber for the dye additive. A liquid-impermeable barrier separates these chambers, preventing chemical interaction while allowing separate sterilization and storage. The barrier is positioned to allow both chambers to be filled independently and then combined during use.
2Ease of manufacture
If solid dye powder is placed on the applicator pad, then assembly is simplified, but non-uniform mixing occurs during dispensing
Solution Approach 1:
A porous plug is positioned in the first chamber to serve as an intermediary mixing element. As disinfectant solution flows through the porous plug, it picks up dye additive that has been deposited on the plug's outer surface, ensuring uniform mixing before the colored solution reaches the applicator pad. The porous structure provides large surface area for effective dye transfer.
3Reliability
If pre-loaded container is used with separate dye provision, then sterilization of disinfectant is improved, but assembly complexity increases
Solution Approach 1:
The container is segmented into two sterilizable chambers with a liquid-impermeable barrier between them. This segmentation allows each chamber to be independently sterilized without contaminating the other, while the integrated container design keeps the overall assembly relatively simple. The barrier itself is designed to be sterilizable along with the container.
4Manufacturing precision
If porous plug impregnated with dye is used, then uniform mixing is achieved, but assembly problems occur and chemical degradation may still happen
Solution Approach 1:
The porous plug is pre-prepared with dye impregnation during manufacturing, so that during final assembly, the plug is already ready to function as a mixing element. The dye is applied to the plug's outer surface in advance, allowing the plug to be inserted into the container without requiring complex dye application steps during assembly.
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
Ensures uniform mixing and handling of additives, avoiding chemical degradation and assembly issues, while maintaining sterility and improving the efficiency of surgical prep solution application.
Implementation Method 1
a liquid-impermeable barrier between them
Implementation Method 2
using a pusher mechanism to open the intermediate barrier and promote mixing
Implementation Method 3
optional baffle structures for enhanced mixing
Data Source
AI summary
An applicator includes an applicator body, an applicator pad attached at a front part of the applicator body, and a pre-loaded container of liquid received in \ the applicator body. The applicator body defines a flow path from the container to the applicator pad. The container includes a front closure portion which is openable to allow liquid to flow from the container into the flow path. The applicator body has a structure which interacts with the front of the container when the container is moved to an opening position relative to the applicator body to open the openable front closure portion. Wherein the container defines a front chamber and a rear chamber with a liquid-impermeable intermediate barrier therebetween. Wherein the container includes a longitudinal pusher element extending relatively movably between the ends of the front chamber.