Detachable Pivotable Jaws for Secure Tissue Engagement
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Solution Overview
Problem
Conventional hemostatic devices and clips used for gastrointestinal bleeding and tissue closure are not strong enough for permanent hemostasis and face challenges with difficult placement and limited tissue grasping, leading to incomplete closure.
Innovation Solution
A medical device with a housing, jaws, driver, and elongated drive wire system that allows for precise tissue engagement and clipping, featuring a connection block mechanism for secure attachment and disengagement, enabling effective grasping and locking of tissue for hemostasis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional hemostatic clips are used for tissue engagement, then the device structure is simple, but the grasping strength is insufficient for permanent hemostasis
Solution Approach 1:
The device is divided into separate components including a housing, driver, elongated drive wire, and connection block that can be assembled and disassembled. This segmentation allows for a more complex overall structure that provides stronger grasping capability while maintaining manageable complexity through modular design.
Solution Approach 2:
The connection block is positioned within the lumen of the elongate tubular member and can slide between extended and retracted positions. The drive wire with enlarged portion is nested within the connection block bore, creating a nested configuration that enables strong tissue engagement while managing structural complexity.
2Ease of operation
If conventional clips are used for tissue closure, then the placement procedure is simple, but the placement difficulty increases for complete closure
Solution Approach 1:
The connection block is pre-positioned within the elongate tubular member in a retracted position, and the drive wire is pre-configured with its enlarged portion. This preliminary arrangement facilitates smoother placement by pre-establishing the engagement mechanism before tissue closure is attempted, improving both ease of operation and closure reliability.
Solution Approach 2:
The connection block acts as an intermediary component between the drive wire and the housing, mediating the transfer of force and enabling more reliable tissue closure. This intermediate element improves placement reliability by providing a dedicated engagement interface while maintaining ease of operation through its sliding mechanism.
3Reliability
If a secure connection mechanism is added to improve tissue engagement, then the grasping reliability improves, but the device complexity increases
Solution Approach 1:
The drive wire with its enlarged portion automatically engages with the connection block when the drive wire is advanced, and the connection block slides into the housing without requiring additional components or complex assembly steps. This self-service mechanism improves tissue engagement reliability while minimizing the increase in device complexity by eliminating the need for separate locking or fastening mechanisms.
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 device provides strong and secure tissue engagement, facilitating permanent hemostasis and complete closure with improved placement accuracy, reducing the need for invasive surgery.
Implementation Method 1
The enlarged portion of the drive wire engages the connection block upon proximal retraction of the drive wire to operate the tubular member from its extended position to its retracted position
Implementation Method 2
The driver is engaged with the proximal ends of the first and second jaws, wherein longitudinal movement of the driver rotates the first and second jaws relative to the housing
Data Source
AI summary
Medical systems, devices and methods are provided for engaging tissue, e.g. for clipping tissue, closing a perforation or performing hemostasis. Generally, the medical system including a housing, first and second jaws rotatable relative to the housing, a driver, and an elongate drive wire. The elongate drive wire may be disconnected from the driver, first and second jaws, and the housing, which are left in vivo engaged with the tissue.