Filter-Integrated Medicine Transfer Device Air Filtration
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Solution Overview
Problem
Air flowing through medicinal liquid transfer pipes can cause adverse effects in patients and clog the pipes, while existing filters fail to prevent air from entering the patient's body or clogging the transfer system due to substances dissolving into air at downstream positions.
Innovation Solution
A filter-integrated medicine transfer device with a housing containing a hydrophobic air-passing filter positioned between the air passage and medicinal liquid channel, and capillary channels to prevent air from entering the patient's body and reduce clogging by filtering out air and impurities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If air-passing filter is used to filter out air, then air filtration is improved, but substances dissolved in medicinal liquid change into air at downstream position and flow into patient's body or clog medicine transfer pipe
Solution Approach 1:
The patent applies preliminary action by positioning the air-passing filter at the upstream side of the medicine transfer pipe, before the capillary channel. This allows air to be filtered out in advance before the medicinal liquid reaches the narrow capillary channel, preventing both air from entering the patient's body and preventing clogging at the critical downstream position. The filter intercepts air bubbles before they can cause harm downstream.
Solution Approach 2:
The air-passing filter serves as an intermediary element between the medicinal liquid flow and the capillary channel. It selectively removes air bubbles from the medicinal liquid while allowing the liquid itself to pass through to the capillary channel. This intermediary component resolves the contradiction by filtering harmful air without interfering with the therapeutic medicinal liquid delivery.
2Productivity
If capillary channel is used to control flow rate, then injection speed is controlled, but head loss is large and pressure drop causes substances to be discharged out of medicinal liquid
Solution Approach 1:
The patent applies preliminary action by removing air bubbles from the medicinal liquid before it enters the capillary channel through the upstream air-passing filter. This preliminary filtration prevents air from being carried through the capillary channel, eliminating the harmful effect of air entering the patient's body while preserving the capillary channel's flow control function.
3Productivity
If medicine transfer pipe is used to transfer medicinal liquid, then liquid transfer is achieved, but air flows inside together with medicinal liquid and moves through passage
Solution Approach 1:
The air-passing filter acts as an intermediary component within the medicine transfer system. It is positioned in the passage to intercept and remove air bubbles from the medicinal liquid flow. This allows the medicine transfer pipe to continue its primary function of transferring medicinal liquid while the intermediary filter eliminates the harmful air contamination that would otherwise move through the passage with the liquid.
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
Effectively prevents air from entering the patient's body and reduces the likelihood of pipe clogging by filtering out air and impurities, ensuring smooth medicinal liquid flow and patient safety.
Implementation Method 1
at least one hydrophobic air-passing filter disposed in the housing and disposed at a boundary between the air passage and the medicinal liquid channel
Implementation Method 2
a medicinal liquid transfer pipe forming a capillary channel to prevent a medicinal liquid from being injected all at once into the body of a patient such that the medicinal liquid is slowly injected for a predetermined time
Data Source
AI summary
A channel for a medicinal liquid is formed in a filter-integrated medicine transfer device according to an embodiment of the present disclosure. The filter-integrated medicine transfer device includes: a housing having an air passage that diverges from a medicinal liquid channel and is connected to outside; at least one hydrophobic air-passing filter disposed in the housing and disposed at a boundary between the air passage and the medicinal liquid channel; and at least one medicine transfer pipe disposed in the housing and having a capillary channel constituting a portion of the medicinal liquid channel.