Basket Paddle Tissue Resection Device
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Solution Overview
Problem
Conventional snare devices often struggle with tissue ejection or disconnection during resection procedures, making it difficult to recapture and remove tissue effectively.
Innovation Solution
A medical device with a handle, shaft, and end effector, featuring a basket and paddle mechanism that can be transitioned between open and closed configurations using an actuator and biasing element, allowing for secure capture and removal of tissue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional snare device is used to resect tissue, then the tissue can be severed from the target site, but the tissue may eject, disconnect, or escape from the snare making recapture difficult
Solution Approach 1:
The device employs a basket structure with radially extendable arms that can contain the severed tissue within its confines. The basket acts as a nested container that secures the tissue after resection, preventing ejection and facilitating easy recapture and removal.
Solution Approach 2:
The device features movable arms that can transition between retracted and extended positions, allowing the basket to open for tissue engagement and close for secure containment. This dynamic structure enables the device to adapt its configuration during different stages of the procedure.
2Productivity
If the tissue is severed from the target site, then the resection is complete, but the tissue moves out of the medical professional's field of view complicating recapture
Solution Approach 1:
The basket structure provides a confined space that holds the severed tissue securely after resection. By nesting the tissue within the basket's arms, the device maintains control over the tissue's position, preventing it from moving out of view and facilitating continued monitoring during the procedure.
3Reliability
If a basket mechanism is added to capture tissue, then tissue retention is improved, but the device complexity increases
Solution Approach 1:
The basket arms serve multiple functions: they engage the tissue during resection, contain the severed portion after cutting, and facilitate removal. This multi-functionality reduces the need for separate components, thereby managing complexity while maintaining reliable tissue capture.
Solution Approach 2:
The movable arms transition between extended and retracted positions to perform different functions. When extended, they engage and contain tissue; when retracted, they allow for device manipulation and positioning. This dynamic behavior enables a relatively simple structure to perform multiple complex functions.
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 captures and removes tissue by ensuring the tissue is retained within the basket after severance, preventing ejection and facilitating efficient removal from the treatment site.
Implementation Method 1
The biasing element may be a spring. During a transition from the closed configuration to the open configuration and a transition from the open configuration and the closed configuration, only one of the basket and paddle may pivot about the hinge while the other of the basket and the paddle may remain stationary.
Implementation Method 2
The rim may be formed from a conductive material. The rim may be configured to be energized with RF energy and may be configured to cut through tissue.
Data Source
AI summary
Medical devices for tissue removal and related methods are described. The medical device includes a handle, including a stationary portion and a movable portion. The medical device includes a shaft. The shaft includes a sheath and one or more wires. The sheath is coupled to the stationary portion of the handle. The one or more wires are coupled to the movable portion of the handle. The medical device includes an end effector positioned at a distal end of the shaft. The end effector includes a basket. The basket includes a rim extending along an opening of the basket. The end effector includes a paddle. The end effector includes a hinge. The basket and paddle are pivotally connected to the hinge.