Guidewire Holding Sheath for Single-Wire ERCP Tool Insertion
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Solution Overview
Problem
Conventional endoscopic ultrasound guided rendezvous (EUS-RV) procedures require multiple guidewires and are time-consuming due to the complexity of catching and releasing guidewires during endoscopic retrograde cholangiopancreatography (ERCP) procedures, particularly when the duodenal papilla is tightly closed.
Innovation Solution
A guidewire holding device integrated with an endoscope, featuring a sheath with a holder that can switch between holding and releasing a guidewire, allowing a treatment tool to be inserted and switched between configurations within the sheath and protruded from the distal end for ERCP procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional EUS-RV procedure uses multiple guidewires and catching/releasing operations, then the treatment device can be inserted into the hollow organ, but the procedural complexity and time consumption increase significantly
Solution Approach 1:
The patent combines the guidewire holding function and treatment tool delivery function into a single integrated device. The sheath contains both the holder for securing the guidewire and the treatment tool, eliminating the need for separate guidewire manipulation steps and multiple devices, thus reducing procedural complexity while maintaining reliable treatment device insertion
2Reliability
If conventional EUS-RV procedure performs multiple guidewire operations, then the treatment device can be deployed, but the procedural time increases
Solution Approach 1:
The sheath is pre-configured with the holder positioned to engage the guidewire before the treatment tool is advanced. This preliminary arrangement of components allows the operator to simply advance the entire assembly along the guidewire without performing intermediate catching or releasing operations, significantly reducing procedural time while ensuring reliable treatment device deployment
3Ease of operation
If the holder is disposed at the distal end of the sheath, then the guidewire can be easily engaged, but the treatment tool cannot be delivered to the target location
Solution Approach 1:
The treatment tool is nested within the sheath, with the holder positioned at the distal end to engage the guidewire. The sheath acts as a delivery catheter that contains both the holder and treatment tool, allowing the guidewire to be engaged at the distal end while the treatment tool remains protected inside the sheath until it needs to be deployed at the target location
Data Source
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AI summary
A guidewire holding device comprises a sheath including a lumen, a holder disposed at a distal end of the sheath and configured to be switchable between holding a guidewire and releasing the guidewire, a treatment tool inserted in the lumen to perform an intended treatment, and a wire connected to the treatment tool and configured to move the treatment tool between a first configuration and a second configuration. In the first configuration, the treatment tool is contained insider the lumen, and, in the second configuration, the treatment tool is protruded from the distal end of the sheath.