Drainage Tube Coupling Part With Service Channel Separation
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Solution Overview
Problem
Drainage tube units often experience blockages due to aspirated secretions, which can impede pressure measurements and flushing procedures.
Innovation Solution
A coupling part with a patient-side attachment that includes a device separating the service channel from the drainage channel, allowing air exchange while preventing body fluids and particles from entering the service line, utilizing a one-way valve or filter that is hydrophobic and oleophobic, and optionally featuring a membrane with a duckbill valve for unidirectional fluid flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the service line is connected directly to the drainage channel, then pressure measurements and flushing procedures can be performed, but the service line becomes blocked by aspirated secretions
Solution Approach 1:
The service channel is separated from the drainage channel by a partition wall with a opening, creating distinct functional zones. This segmentation allows the service line to access the drainage system for measurements and flushing while preventing direct contamination by aspirated secretions, thus maintaining both operational capability and line patency
Solution Approach 2:
The partition wall with opening acts as an intermediary structure between the service channel and drainage channel. It provides controlled access for service functions while blocking the direct path of secretions, enabling pressure measurements and flushing without compromising service line reliability
2Reliability
If hydrophobic filters are used to protect the suction pump, then contamination is prevented, but the filters become blocked by liquid uptake
Solution Approach 1:
The harmful function of liquid filtration is extracted from the service line system entirely. Instead of placing filters in the service line that would block liquid flow, the invention allows the service line to remain open and unfiltered, using the partition wall structure to provide protection without the flow-restricting properties of traditional hydrophobic filters
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 the service line remains unblocked, allowing for uninterrupted pressure measurements and flushing procedures by preventing aspirated liquids and particles from entering the service channel, thus maintaining system functionality.
Implementation Method 1
The membrane (4') is made from a material that is permeable to air and impermeable to liquid
Implementation Method 2
The duckbill valve (45) permits delivery of fluid from the service channel into the drainage channel and prevents delivery of particles and liquid from the drainage channel into the service channel
Implementation Method 3
utilizing a one-way valve or filter that is hydrophobic and oleophobic
Implementation Method 4
utilizing a one-way valve or filter that is hydrophobic and oleophobic
Data Source
AI summary
A coupling part of a drainage tube unit for aspirating body fluids by a suction pump includes a patient-side drainage attachment, a pump-side drainage orifice for connection to a drainage tube, and a drainage channel connecting the drainage attachment and the drainage orifice to each other. The coupling part also includes a pump-side first service orifice for connection to a service tube, a second service orifice ending in the interior of the coupling part, a service channel connecting these first and second service orifices, and a device which separates the service channel from the drainage channel. The device permits delivery of fluid from the service channel into the drainage channel and prevents delivery of particles and liquid from the drainage channel into the service channel. The device is arranged in the coupling part at a location that allows a flow through the drainage channel from the drainage attachment to the drainage orifice without passage through the device.