Rotational-Flow Suction Head for Gentle Blood Removal
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Solution Overview
Problem
Suctioning fluids containing organic components, particularly blood, leads to issues such as mixing with air bubbles, damage to blood components due to shear forces, adhesion to tissue, and ineffective suction due to permanent or intermittent adherence, which can cause severe health risks and structural changes to molecules.
Innovation Solution
A suction head design with flow guide devices that impart a rotational component to the fluid flow, reducing viscosity and enabling separation of air bubbles, minimizing shear forces, and facilitating selective discharge of air and liquid through separate pathways.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a suction head is used to suction blood from surgical fields, then blood can be removed from the surgical field, but air bubbles mix with the blood and blood components are damaged due to shear forces
Solution Approach 1:
The suction head divides the suction function into separate components: multiple suction openings at the distal end for liquid intake, and a separate air removal opening at the proximal end for air bubble extraction. This segmentation allows independent optimization of each function, enabling effective blood removal while preventing air bubble contamination and minimizing shear force damage to blood components.
Solution Approach 2:
The patent introduces an intermediary structure - the separated air removal pathway - that acts as a mediator between the suction process and the blood flow. This intermediary channel specifically targets and removes air bubbles before they can mix with and damage blood components, while the main suction pathway handles liquid blood removal with minimized shear forces.
2Productivity
If suction power is increased to improve blood removal efficiency, then more blood can be suctioned, but tissue adhesion and shear force damage increase
Solution Approach 1:
The suction head segments the suction function into distinct pathways: distal suction openings for blood intake and a proximal air removal opening for air extraction. This segmentation allows the system to operate at higher suction powers for efficient blood removal while the separate air pathway prevents tissue adhesion and minimizes shear force damage by providing a dedicated channel for air bubble removal.
Solution Approach 2:
The patent applies local quality by designing different regions of the suction head with specialized functions: the distal end features multiple suction openings optimized for liquid blood intake, while the proximal end features a separate air removal opening optimized for air bubble extraction. This localized functional differentiation enables high-efficiency blood removal without the harmful effects of tissue adhesion and excessive shear forces.
3Reliability
If the suction head adheres permanently to tissue to ensure continuous suction, then suction stability improves, but tissue damage risk and shear forces increase
Solution Approach 1:
The suction head segments the suction function into separate pathways with the distal suction openings for blood intake and the proximal air removal opening for air extraction. This segmentation maintains suction stability by ensuring continuous blood flow through the main pathway while the separate air pathway prevents tissue adhesion and minimizes shear force damage, eliminating the need for permanent tissue adherence.
4Ease of manufacture
If the suction head design is simplified to reduce complexity, then manufacturing ease improves, but air bubble separation and blood component protection capabilities are reduced
Solution Approach 1:
The suction head employs segmentation by providing multiple suction openings at the distal end and a separate air removal opening at the proximal end. This segmented design effectively separates air bubble removal from blood suction functions, preventing air bubble mixing and blood component damage while maintaining manufacturing simplicity through the straightforward implementation of multiple openings in the suction head structure.
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 design effectively reduces fluid viscosity, separates air bubbles, minimizes damage to organic components, and ensures efficient suction without tissue adhesion, enhancing safety and effectiveness in surgical applications.
Implementation Method 1
the flow guide devices impart a rotational component about the main axis to a flow of liquid entering through the suction holes through the main channel... If the fluid containing organic components has thixotropic properties, this advantageously results in a reduced viscosity of the fluid
Implementation Method 2
The rotational component of the liquid flow around the main axis and the associated centrifugal forces can become so large that air sucked into the main channel through the suction holes with the liquid concentrates in the area of the main axis and can be removed from there, while the liquid collects on the inner surface bordering the main channel
Data Source
Figure 1~4
Figure 5~7
AI summary
In a suction head (2) for suctioning a fluid containing organic components, comprising an inner surface (3) defining a main channel (4) of the suction head (2), wherein the main channel (4) extends along a main axis (1) of the suction head (2) to a suction connection (7) of the suction head (2), and at least two suction holes (6) entering into the suction head (2) and feeding through the inner surface (3) into the main channel (4), flow-guiding devices of the suction head (2) are designed in such a way that they impart a rotation component about the main axis (1) on a flow - brought about by a negative pressure in the suction connection (7) - of the fluid entering through the suction holes (6) and travelling through the main channel (4).