Endoscopic Cannulating Device Guidewire Locking Mechanism
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Solution Overview
Problem
Endoscopic device exchange procedures often result in guidewire displacement, leading to loss of access to the desired treatment site due to the need for manual control and coordination during device exchange, making the processes time-consuming and inefficient.
Innovation Solution
A cannulating device with a guidewire lumen and a slit extending from the distal tip to the proximal position, combined with an adapter that widens the slit to merge the guidewire, allowing continuous locking and retention of the guidewire in place, eliminating the need for manual holding and reducing displacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the long wire technique is used to maintain guidewire position during device exchange, then the guidewire can be securely controlled, but the exchange process becomes time-consuming and requires precise coordination between multiple operators
Solution Approach 1:
The invention extracts the guidewire control function from the operator's manual manipulation and transfers it to the locking mechanism integrated into the cannulating device. The locking mechanism engages with the guidewire to maintain its position automatically, eliminating the need for continuous manual holding and coordination between operators during device exchange.
Solution Approach 2:
The cannulating device provides self-service by incorporating an integrated locking mechanism that automatically secures the guidewire in place. This self-locking capability eliminates the need for external manual control, allowing the device to maintain guidewire position independently during the exchange process, thereby reducing exchange time and operational complexity.
2Ease of operation
If the short wire technique is used to allow physician control of the guidewire, then manual control is improved, but the locking and unlocking process still requires time-consuming manual intervention
Solution Approach 1:
The locking mechanism is pre-configured to engage with the guidewire automatically upon insertion or at predetermined positions during the procedure. This preliminary locking action eliminates the need for time-consuming manual locking and unlocking operations, as the guidewire is already secured in the optimal position before the exchange begins.
Solution Approach 2:
The invention replaces the manual mechanical locking and unlocking process with an automated locking mechanism that uses spring-loaded or friction-based engagement. This mechanical substitution eliminates the need for repeated manual intervention, reducing the time required for locking and unlocking operations while maintaining ease of guidewire control.
3Reliability
If manual holding of the guidewire is required during device exchange, then guidewire displacement is prevented, but the procedure becomes complex and time-consuming
Solution Approach 1:
The invention merges the guidewire locking function with the cannulating device structure itself. The locking mechanism is integrated into the device body, combining the functions of device delivery and guidewire stabilization into a single unified system. This integration eliminates the need for separate manual holding operations, reducing procedural complexity while maintaining guidewire position stability.
Solution Approach 2:
The locking mechanism acts as an intermediary between the cannulating device and the guidewire, providing automatic engagement and disengagement. This intermediary mechanism eliminates the need for direct manual manipulation of the guidewire, simplifying the exchange procedure while ensuring reliable guidewire position stability throughout the process.
Data Source
Figure 1
Figure 2~3
Figure 4A~4B
AI summary
Embodiments of the present disclosure are directed to cannulating devices and methods for exchanging cannulating devices in an endoscopic procedure. In one implementation, an apparatus for endoscopic operations is described. The apparatus includes a cannulating device to be introduced through an internal lumen of an endoscope via a biopsy port. The cannulating device has an elongated body. The elongated body includes a guidewire lumen configured to receive a guidewire therein, and a slit extending over at least a portion of the length of the elongated body from a distal tip to a proximal position of the elongated body.