Endoscopic Incision Device for Duodenal Papilla
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Solution Overview
Problem
The physiological structure of the duodenal papilla in some patients, with thick and long folds, increases the difficulty of intubation during ERCP procedures, reduces the success rate, and heightens the risk of postoperative complications such as pancreatitis and perforation.
Innovation Solution
An endoscopic incision device with a sheath tube and a pulling portion that includes a pulling wire and a protruding portion, which can switch between states to accommodate or protrude from the sheath tube, allowing the protruding portion to pull and flatten duodenal papilla folds, thereby widening the intubation channel and facilitating guidewire insertion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a guidewire is inserted directly into the duodenal papilla, then the procedure is simple, but the success rate is low when folds are thick and long
Solution Approach 1:
The protruding portion is deployed before guidewire insertion to flatten the duodenal papilla folds, creating a favorable pathway in advance. This preliminary action of fold flattening ensures subsequent guidewire insertion can proceed smoothly without encountering resistance from thick and long folds.
Solution Approach 2:
The protruding portion acts as an intermediary device between the operator and the duodenal papilla. It mechanically interacts with the folds to flatten them, thereby mediating the difficult intubation process and enabling successful guidewire passage without direct manual manipulation of the folds.
2Reliability
If the protruding portion is always deployed, then fold flattening is effective, but the device cannot be inserted into the duodenal papilla
Solution Approach 1:
The protruding portion transitions from a compressed state during insertion to an expanded state during operation. This dynamic transformation allows the device to navigate the narrow duodenal papilla opening in its compact form, then deploy to its functional expanded form once positioned, achieving both insertion capability and flattening effectiveness.
Solution Approach 2:
The protruding portion is nested within the delivery catheter during insertion, similar to a doll within a doll. This nesting allows the larger functional structure to pass through the narrow duodenal papilla in a compact configuration, then be deployed outward once positioned to perform its fold-flattening function.
3Ease of operation
If conventional intubation methods are used, then the procedure is straightforward, but postoperative complications such as pancreatitis and perforation occur more frequently
Solution Approach 1:
The protruding portion flattens the duodenal papilla folds before guidewire insertion, creating a smooth pathway in advance. This preliminary preparation prevents the guidewire from traumatizing the folds during insertion, thereby reducing the risk of postoperative complications such as pancreatitis and perforation while maintaining procedural simplicity.
Data Source
AI summary
The embodiments of the present disclosure provide an endoscopic incision device. The endoscopic incision device may include a sheath tube. The sheath tube may have a proximal end and a distal end, the sheath tube may be provided with a channel extending along an axial direction, and the channel may be able to accommodate a pulling portion. The pulling portion may include a pulling wire and a protruding portion disposed at a distal end of the pulling wire, and the pulling wire may move axially within the channel to cause the protruding portion to switch between a first state and a second state. When the protruding portion is in the first state, the protruding portion may be accommodated within the channel. When the protruding portion is in the second state, the protruding portion may protrude out of the distal end of the channel.