Medical Device Tissue Removal with Pyramid Tip and Prism Cutting
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Solution Overview
Problem
Current surgical tools face challenges in efficiently creating channels in soft tissues with minimal invasion and discomfort, particularly in delicate areas like the eye, where existing devices often require significant penetration force and may cause damage during insertion and rotation.
Innovation Solution
A medical device with a pyramid-shaped piercing tip and an elongated prism-like cutting section, configured for smooth penetration and rotation, featuring a shaft with a larger cross-section to act as a stopper, allowing controlled insertion and minimizing tissue damage, and a protective sleeve to prevent harm to surrounding tissues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional surgical tools are used for tissue penetration and channel creation, then the channel can be created in the tissue, but significant penetration force is required and tissue damage occurs during insertion and rotation
Solution Approach 1:
The device is segmented into distinct functional zones: a pyramid-shaped distal end for penetration, a cylindrical body with cutting edges for channel formation, and a proximal shaft for actuation. This segmentation allows each zone to be optimized for its specific function, reducing overall tissue damage while maintaining effective penetration capability
Solution Approach 2:
The distal end of the device features a pyramid shape with rounded edges and a curved cutting surface, replacing sharp angular transitions. This curvature reduces stress concentration during tissue penetration and allows smoother insertion with lower peak forces, thereby reducing tissue damage while maintaining penetration effectiveness
2Productivity
If cutting elements project from the device body for tissue removal, then tissue can be effectively removed, but the device complexity increases and tissue damage during insertion increases
Solution Approach 1:
The penetration function and cutting function are merged into a single integrated device body. The cylindrical body itself serves as the cutting element through its peripheral cutting edges, eliminating the need for separate detachable cutting components. This reduces device complexity while maintaining effective tissue removal capability
Solution Approach 2:
The device body serves multiple functions simultaneously: it acts as the penetration instrument, the cutting tool with peripheral edges, and the channel-forming element. This multi-functionality eliminates the need for separate cutting elements, reducing overall device complexity while maintaining productive tissue removal
3Ease of operation
If the device is inserted into tissue without rotation, then insertion is simpler, but significant tissue damage occurs and channel formation is ineffective
Solution Approach 1:
The device performs preliminary penetration action in a straightforward linear motion without requiring rotation during insertion. The pyramid-shaped distal end is specifically designed to penetrate tissue directly, separating the penetration phase from the cutting phase and simplifying the insertion operation
Solution Approach 2:
The device transitions from a static insertion phase (linear motion only) to a dynamic cutting phase (rotation enabled). The cutting edges are positioned on the cylindrical body surface, allowing rotation to be activated only after penetration, thereby simplifying insertion while enabling effective cutting when needed
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 effectively creates channels in soft tissues with reduced penetration force, minimizing tissue damage and discomfort, while ensuring controlled insertion and efficient tissue removal, suitable for conditions like Glaucoma treatment.
Implementation Method 1
the distal end portion comprising a tissue piercing tip of a pyramid-like shape
Implementation Method 2
with at least one of the prism edges between the surfaces being configured as a tissue cutting blade
Implementation Method 3
an integral rotatable tool formed by an elongated distal member and a proximal shaft
Data Source
AI summary
The present disclosure provides medical devices for creating a channel in a biological soft tissue. The devices comprise an integral rotatable tool formed by an elongated distal member and a proximal shaft, the elongated member having a distal end portion and a proximal end portion, the distal end portion comprising a tissue piercing tip of a pyramid-like shape, and the proximal end portion comprising an elongated prism-like portion having at least three surfaces and respective prism edges, with at least one of the prism edges between the surfaces being configured as a tissue cutting blade, and the proximal shaft interfacing and extending from the prism-like portion and having a cross section larger than a cross section of the prism-like portion at the interface. In some embodiments, the device comprises an intermediate portion extending between the distal end portion and the proximal end portion and having a frustum shape, thereby forming a smooth transition between a base portion of the tissue piercing tip and the proximal end portion.