Surgical Vacuum Device With Deformable Suction Tip
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Solution Overview
Problem
Current vacuum aspiration systems in surgical procedures often forcibly displace delicate tissues, causing trauma and making it difficult to manipulate proximal layers without disturbing distal layers, which can lead to unintended suturing during minimally-invasive procedures.
Innovation Solution
A surgical device with a handle portion and a shaft that includes a first suction tip with deformable material, allowing for adjustable suction control via a second port that can be closed to maintain suction or vented to atmosphere, and interchangeable suction tips with varying shapes and materials for different tissue types, enabling precise fluid removal and tissue manipulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a uniform distal tip is used on the aspiration cannula, then fluid can be effectively removed from the surgical site, but tissue may be forcibly displaced towards the tip and into contact with the tip, potentially damaging the tissue
Solution Approach 1:
The distal tip is configured with non-uniform properties including varying porosity, permeability, and suction force distribution across different regions. The tip includes a first region with higher porosity/permeability for fluid removal and a second region with lower porosity/permeability to reduce tissue displacement, allowing each region to perform its specific function optimally
Solution Approach 2:
The distal tip employs gradual transitions in physical parameters such as porosity, permeability, and pore size from one region to another. This gradual parameter change prevents abrupt tissue displacement while maintaining effective fluid removal, reducing the harmful effects on delicate tissues
2Productivity
If uniform suction force is applied across all tissue layers, then fluid can be removed from the surgical site, but both proximal and distal layers of delicate tissue may be engaged and displaced, making it difficult to manipulate proximal layers without disturbing distal layers
Solution Approach 1:
The distal tip creates different suction force zones where proximal regions exert stronger suction for fluid removal while distal regions exert gentler suction that allows delicate tissue layers to remain manipulable. This local differentiation enables surgeons to engage and manipulate proximal tissue layers for suturing without inadvertently engaging or displacing distal tissue layers
3Device complexity
If a single distal tip design is used, then the device structure remains simple, but the device cannot selectively manipulate different tissue layers or provide varying levels of suction force for different surgical needs
Solution Approach 1:
The distal tip is segmented into multiple functional regions along its length, with each region having distinct porosity, permeability, and suction force characteristics. This segmentation allows the single tip to provide multiple suction profiles and tissue interaction modes, enhancing versatility without requiring multiple separate devices
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 device provides atraumatic suction and precise control over suction force, minimizing tissue trauma and allowing for selective suturing of proximal layers without engaging distal tissues, enhancing surgical precision and safety in minimally-invasive procedures.
Implementation Method 1
the fluid is sucked through the distal tip of the aspiration cannula and away from the treatment area due to negative pressure provided by the vacuum source
Data Source
AI summary
A surgical device includes a handle portion having a first port and a second portion, and an elongated shaft is rotatably coupled to the handle portion. A first suction tip is removably secured to a distal end of the shaft, the first suction tip having a first cross-sectional shape that is configured to engage a first type of tissue on a patient. When the first port is coupled to the vacuum source, and when the second port is in a closed position, fluid at the first suction tip is passed through the shaft, into a fluid chamber of the handle portion, and out of the first port. When the first port is coupled to the vacuum source, and when the second port is in an open position, the fluid chamber is vented to the atmosphere, and fluid at the first suction tip is not displaced to the first port.