Ductal Sampling Device Textured Scraping Body
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Solution Overview
Problem
Conventional endoscopes and duodenoscopes face challenges in navigating to deep anatomical regions, obtaining sufficient tissue samples, accurately engaging target tissue, and efficiently retrieving biological matter, particularly in procedures like ERCP, where devices become progressively smaller and more difficult to maneuver, leading to inadequate sample sizes and increased procedural time and cost.
Innovation Solution
The development of a ductal sampling device with a textured scraping body that can be inserted through a cholangioscope's working channel, featuring cutting elements and storage spaces, allowing for effective engagement and retrieval of target tissue while maintaining direct visualization, and a sheath for protection and retrieval.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a small-diameter device is used to pass through the working channel of a cholangioscope, then the device can be inserted into deep anatomical regions, but the device cannot obtain sufficient tissue sample volume
Solution Approach 1:
The scraping body extends longitudinally along the shaft to create a lengthwise sampling surface, transforming the sampling capability from a limited circular cross-section to an extended linear surface. This dimensional change allows sufficient tissue engagement and sample collection despite the small device diameter constraint of passing through the cholangioscope working channel.
2Quantity of substance
If a larger sized biopsy forceps is used to obtain sufficient tissue samples, then the sample volume is adequate, but the ability to use direct visualization of the forceps using the imaging capabilities of the cholangioscope is lost
Solution Approach 1:
The device separates the sampling function (scraping body with cutting elements) from the visualization function (cholangioscope), allowing the sampling mechanism to be small enough to pass through the scope while the scope maintains its independent imaging capabilities. The scraping body acts as a separate functional element that can be manipulated under visual guidance without compromising the scope's imaging system.
3Ease of operation
If conventional biopsy forceps are used, then the device can be maneuvered through the working channel, but the likelihood of accurately engaging the correct target tissue is reduced
Solution Approach 1:
The scraping body features a textured surface with cutting elements that provide visual contrast and tactile distinction under endoscopic visualization, enabling the operator to clearly identify when the target tissue is properly engaged. The textured surface creates visible interaction patterns during scraping that confirm accurate tissue contact and engagement.
4Quantity of substance
If multiple insertions are performed to obtain sufficient sample material, then adequate tissue volume is obtained, but the procedural time and cost increase
Solution Approach 1:
The scraping body with its extended textured surface allows continuous scraping motion along the target tissue, accumulating tissue samples in a single continuous action rather than requiring multiple discrete biopsy attempts. The design enables one-pass sampling where tissue is progressively collected along the length of the scraping body during a single insertion and withdrawal cycle.
Data Source
AI summary
A ductal sampling device comprises an elongate shaft comprising a proximal end portion and a distal end portion comprising a textured scraping body, and a sheath configured to slide over the elongate shaft to alternatively cover and cover the textured scraping body. A method of collecting biological matter using a ductal sampling device comprises inserting the ductal sampling device into anatomy of a patient, guiding a textured scraping body of the ductal sampling device to a target tissue, grating the textured scraping body against the target tissue, and collecting biological matter from the target tissue with the textured scraping body.