Decentralized Suction Tip for Gentle Biological Fluid Aspiration
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Solution Overview
Problem
Existing suction tips for biological fluids, particularly blood, face issues such as mixing with air bubbles, damage to blood components due to shear forces, and structural changes during suction, leading to potential tissue damage and complications like air embolism, kidney failure, and wound healing disorders.
Innovation Solution
A suction tip with a main axis and wall-based main body featuring decentralized suction holes angled sideways, ensuring a continuous overlap with the suction line's cross-section, promoting laminar flow and minimizing shear forces, and optionally incorporating an open-pore sponge for fluid protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional suction tips are used to aspirate blood from surgical fields, then blood can be removed from the surgical field, but air bubbles mix with the blood and damage to blood components occurs due to shear forces
Solution Approach 1:
The suction tip is divided into multiple decentralized suction holes distributed across its surface rather than a single large opening. This segmentation allows blood to be drawn through multiple pathways simultaneously, reducing the velocity and shear forces in each individual hole, thereby protecting blood components from damage while maintaining effective blood removal.
Solution Approach 2:
The suction holes are strategically positioned at different locations on the suction tip surface to create localized suction zones. This distribution ensures that blood is drawn gently from various points in the surgical field, preventing air bubble mixing and reducing localized shear forces that could damage blood components.
2Productivity
If suction power is increased to improve blood removal, then productivity increases, but damage to blood components and tissue trauma worsen
Solution Approach 1:
By dividing the total suction flow across multiple smaller holes, the suction power can be increased overall while each individual hole maintains low velocity and low shear forces. The segmented structure allows high productivity without proportionally increasing damaging shear forces.
Solution Approach 2:
The suction action is distributed across the two-dimensional surface of the suction tip rather than concentrated in a single point. This dimensional distribution spreads the mechanical impact over a larger area, reducing tissue trauma and shear forces while maintaining effective blood removal through the combined effect of multiple holes.
3Productivity
If suction holes are positioned to maximize blood flow, then productivity improves, but suction tip adhesion to tissue increases causing tissue damage
Solution Approach 1:
Multiple decentralized suction holes prevent the tip from adhering to tissue at any single point with excessive force. The distributed configuration ensures that even if the tip contacts tissue, the adhesion force is spread across multiple small contact points rather than concentrated, reducing tissue damage risk.
Solution Approach 2:
The suction holes are positioned to create localized suction fields that can be optimized for blood flow without creating strong overall adhesion. This local optimization allows efficient blood aspiration while minimizing the suction tip's tendency to stick to surrounding tissue.
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 minimizes the risk of air bubble mixing, reduces tissue trauma, and ensures gentle suction, protecting the integrity of biological fluids by maintaining laminar flow and reducing noise, indicating favorable suction conditions.
Implementation Method 1
a suction tip (1) for the gentle suctioning of a biological fluid
Implementation Method 2
ensuring a continuous overlap with the suction line's cross-section, promoting laminar flow and minimizing shear forces
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention relates to a suction tip (1) for suctioning a biological fluid, comprising a main body (12) having a main shaft (3) and a wall (4), a connection (5) for a suction line (2) formed on the main shaft (3) on the main body (12) and defining a free connection cross-section (6) of the suction tip (1), and multiple decentralised suction holes (7) laterally entering the main body (12), running through the wall (4) of the main body (12) and communicating with the connection (5) in the main body (12), wherein, with the continuous extension of its path (13) through the wall (4) of the main body (12), a free minimum cross-section (10) of each decentralised suction hole (7) overlaps completely with the free connection cross-section (6) of the connection (5).