Hemostatic Clip Assembly with Rotating Jaws and Self-Disconnecting Spring
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Solution Overview
Problem
Existing hemostatic clips used in endoscopic surgical procedures often have limitations in terms of deployment length, tissue grasping efficiency, and disconnection mechanisms, which can lead to suboptimal performance in procedures like ampullectomy and polypectomy, resulting in potential bleeding and increased recovery time.
Innovation Solution
A novel hemostatic clip assembly with a proximal delivery catheter and distal clip assembly that includes a drive wire, spring release, and shaft spring, allowing for improved tissue grasping and locking mechanisms, along with a simplified disconnection mechanism to facilitate efficient deployment and reduced clip body length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If existing hemostatic clips are used in endoscopic surgical procedures, then hemostasis can be achieved, but the deployment length is limited and tissue grasping efficiency is suboptimal
Solution Approach 1:
The jaw members are designed to rotate about the longitudinal axis during deployment, transitioning from a parallel configuration to an interlaced configuration. This dynamic movement allows the jaws to actively engage and grasp tissue more effectively while achieving full deployment length, resolving the contradiction between deployment length and tissue grasping efficiency
Solution Approach 2:
The clip assembly is divided into separate functional components including jaw members, a body portion, and a delivery catheter. The jaw members can rotate independently about the longitudinal axis, allowing each component to perform its specific function optimally while contributing to overall tissue grasping effectiveness
2Productivity
If existing hemostatic clips are used, then hemostasis can be achieved, but the disconnection mechanism is complex and deployment efficiency is reduced
Solution Approach 1:
The shaft spring is designed to disconnect from the delivery catheter upon deployment. This extraction of the spring from the delivery system simplifies the disconnection mechanism and allows for more efficient deployment, as the spring automatically separates from the catheter body after serving its deployment function
Solution Approach 2:
The shaft spring automatically disconnects from the delivery catheter through its own mechanical action during deployment. The spring's movement and force generation cause it to separate from the catheter body without requiring additional complex disconnection mechanisms, allowing the system to deploy itself efficiently
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
The improved design enhances tissue grasping and locking capabilities, reduces the risk of bleeding, and shortens recovery time by providing a more efficient and reliable hemostatic solution with a shorter clip deployment length and simplified user feedback.
Implementation Method 1
The shaft spring can include at least one arm removably coupled to the distal clip housing. The at least one arm can include an outwardly extending flange that removably engages with an aperture defined in a proximal end of the distal clip housing. The outwardly extending flange of the at least one arm can be configured and adapted to bend and release from the aperture of the distal clip housing as the spring release moves proximally to move the shaft spring proximally relative to the distal clip housing.
Implementation Method 2
The proximal delivery catheter includes a drive wire movably positioned within the elongated catheter body, a spring release coupled to a distal end of the drive wire, and a shaft spring positioned radially outward from the spring release. The shaft spring includes an annular portion, wherein the spring release is configured and adapted to abut the annular portion of the shaft spring upon proximal translation of the spring release.
Implementation Method 3
The distal clip assembly can include a jaw adapter yoke slidably positioned within the distal clip assembly, and a jaw assembly having a pair of cooperating jaw members fixed to the jaw adapter yoke by a first pin. The first pin can be oriented orthogonally relative to the longitudinal axis. At least one of the jaw members can be configured and adapted to rotate about the first pin and to rotate about the longitudinal axis.
Data Source
AI summary
The device includes a proximal delivery catheter having a proximal handle assembly and an elongated catheter body extending distally from the proximal handle assembly. The elongated catheter body defines a longitudinal axis. The proximal delivery catheter includes a drive wire movably positioned within the elongated catheter body, a spring release coupled to a distal end of the drive wire, and a shaft spring positioned radially outward from the spring release. The shaft spring includes an annular portion. The spring release is configured and adapted to abut the annular portion of the shaft spring upon proximal translation of the spring release. The device includes a distal clip assembly removably connected to the distal end of the elongated catheter body. The proximal delivery catheter is configured and adapted to transmit linear motion along the longitudinal axis and torsion about the longitudinal axis to at least a portion of the distal clip assembly.