Zero-Exposure Formalin Container with Piercing Insert
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Solution Overview
Problem
There is a need to limit human exposure to formaldehyde, a volatile organic compound (VOC) known to be toxic and potentially carcinogenic, particularly during the biopsy process where formalin, a formaldehyde-containing product, is used.
Innovation Solution
A zero-exposure container system is designed to house a specimen, featuring a container with a lower cavity and an inner rim, a cap with a compartment housing a liquid mixture including a coloring agent, and an insert with protrusions to break the film sealing the compartment when the cap is fastened, allowing the liquid mixture to drain into the lower cavity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If formalin is used as a fixative in the biopsy process, then the specimen can be preserved effectively, but human exposure to formaldehyde increases due to its volatility
Solution Approach 1:
The container is divided into separate compartments: a storage compartment for the liquid mixture and a specimen compartment. This segmentation prevents the liquid mixture from contacting the specimen until activation, containing the formaldehyde within the storage compartment and preventing its release into the environment while maintaining preservation efficacy.
Solution Approach 2:
The liquid mixture is pre-prepared and stored in the container in a sealed state before use. This preliminary action allows the fixative to be ready for immediate use while maintaining safety, as the mixing and activation occur only at the point of use through the breakable film mechanism.
2Object-affected harmful factors
If the liquid mixture is kept sealed in the compartment, then exposure to formaldehyde is minimized, but the liquid mixture cannot mix with the specimen until activation
Solution Approach 1:
The system uses a self-activating mechanism where the user simply places the insert into the container, and the protrusions automatically break the film and release the liquid mixture through gravity and pressure differential. No additional manual intervention is needed to transfer or mix the liquid, making the activation process simple and intuitive.
Solution Approach 2:
The breakable film acts as an intermediary barrier between the sealed liquid mixture and the specimen compartment. It maintains separation during storage and transport, then allows controlled release during activation, serving as a simple yet effective mediator that enables both safety and functionality.
3Ease of manufacture
If the container uses a simple sealed structure, then manufacturing is easier and cost is reduced, but it cannot provide controlled release of the liquid mixture
Solution Approach 1:
The container transitions from a static sealed structure to a dynamic system with controlled release capabilities. The breakable film and insert mechanism allow the container to adapt between two states: fully sealed during storage and actively releasing during use. This dynamic capability is achieved through simple, low-cost components that maintain manufacturing ease while adding functionality.
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 container system effectively minimizes external exposure to formaldehyde by ensuring the liquid mixture, including formalin, remains sealed until intentionally mixed with the specimen, thereby reducing the risk of human exposure and sample loss.
Implementation Method 1
a plurality of holes positioned to allow the liquid mixture to drain from the compartment to the lower cavity when the film is broken
Data Source
AI summary
Systems and methods of housing a medical specimen in a zero-exposure container are disclosed. In some embodiments, the zero-exposure container includes a container, a cap, and an insert. The cap may include a compartment for housing and sealing a liquid mixture, the compartment includes a film facing inwards relative to the system. The insert may include one or more protrusions operable to pierce the film of the compartment when the cap is fastened on the container while the system is in an active configuration. The insert may rest on an inner lip of the container such that the protrusions face downwards when the system is in a stored configuration and upwards when the system is in the active configuration. The liquid mixture may include a coloring agent that allows a user to visually verify the location of the liquid mixture in the system.