Endoscopic Instrument for Simultaneous Polyp Resection and Retrieval
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Solution Overview
Problem
Current colonoscopy techniques lack precision and efficiency in removing sessile polyps and multiple polyps, leading to sample bias and increased risk of missed cancerous lesions due to the need for separate cutting and retrieval tools, which prolongs procedures and leaves behind potentially malignant tissue.
Innovation Solution
An improved endoscopic instrument with a power-driven head capable of cutting and retrieving polyps within a single instrument channel, incorporating a cutting shaft, aspiration channel, and a flexible portion that couples to a vacuum source for simultaneous resection and removal of polyps without requiring tool alternation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If separate cutting tools and retrieval tools are used, then the functions are specialized, but the procedure time increases and sample bias occurs
Solution Approach 1:
The patent combines the cutting function and retrieval function into a single integrated instrument. The instrument includes a cutting element (such as a knife or snare) and a retrieval mechanism (such as forceps or a grasping element) within the same device, allowing both polyp resection and specimen retrieval to be performed without changing tools, thereby eliminating procedure time loss and preventing sample bias.
Solution Approach 2:
The instrument is designed to perform multiple functions: cutting/polyp resection, tissue grasping, and specimen retrieval. This multi-functional design allows a single instrument to complete the entire polyp removal and retrieval process, improving productivity while avoiding the time penalty of tool alternation.
2Measurement precision
If separate cutting tools and retrieval tools are used, then each tool can be optimized for its function, but precision is reduced due to tool alternation
Solution Approach 1:
The cutting mechanism and retrieval mechanism are integrated within a single instrument body, allowing precise coordinated action. The cutting element can be deployed to resect the polyp while the retrieval element is positioned to immediately grasp and retrieve the specimen, maintaining high precision throughout the procedure without the disruption of tool changes.
3Ease of operation
If multiple tools are used for polyp removal, then comprehensive tissue sampling is possible, but the procedure becomes cumbersome
Solution Approach 1:
The single instrument incorporates both cutting and retrieval capabilities, eliminating the need to switch between multiple specialized tools. This simplifies the operator's workflow while maintaining the ability to perform comprehensive tissue sampling and retrieval, making the procedure easier to execute.
4Device complexity
If separate tools are used, then each tool can be simple in design, but the overall system becomes complex
Solution Approach 1:
While the integrated instrument has higher individual complexity than separate simple tools, this consolidation eliminates the need for multiple tool changes and coordination between separate devices. The net effect is improved overall system efficiency and productivity, as the integrated design streamlines the workflow and eliminates procedural interruptions.
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
Enhances precision and speed of polyp removal, reducing the risk of sample bias and shortening procedure time by enabling efficient debridement and retrieval of multiple polyps during a single colonoscopy session.
Implementation Method 1
The second proximal end of the flexible portion is configured to couple to a vacuum source such that the resected material entering the aspiration channel via the material entry port is removed from the aspiration channel at the material exit port
Data Source
AI summary
An improved flexible endoscopic instrument to precisely and efficiently obtains samples of flat polyps and multiple polyps from a patient by debriding one or more polyps and retrieving the debrided polyps without having to alternate between using a separate cutting tool and a separate sample retrieving tool and may be used with an endoscope. In one aspect, the cutting tool is coupled to a flexible torque coil or torque rope that is configured to transfer rotational energy from a powered actuator through the length of the endoscope onto the cutting tool.