Detachable Pivotable Jaws for Permanent Hemostasis
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional hemostatic devices and clips used for gastrointestinal bleeding are not strong enough to achieve permanent hemostasis and often face difficulties in tissue grasping and closure, especially in gastrointestinal structures, leading to incomplete closure and the need for invasive surgical procedures.
Innovation Solution
A medical device with rotatable jaws and a biasing strip that radially biases the jaws to engage tissue, featuring a drive wire mechanism for longitudinal movement and rotation, allowing for effective grasping and clipping of tissue, and a gripping strip to enhance tissue engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional clips are used for hemostasis, then the procedure is minimally invasive, but the clips are not strong enough to achieve permanent hemostasis
Solution Approach 1:
The device is divided into separate functional components: a detachable driver assembly that can be introduced through the endoscope and a separate jaw assembly that remains in the body. The driver includes a biasing strip with projections that engage tissue, while the jaws provide the clipping function. This segmentation allows the complex strong-clipping mechanism to be delivered through a minimally invasive endoscope.
Solution Approach 2:
The driver assembly is designed to be nested within or delivered through the endoscope working channel. The biasing strip with its projections is contained within the driver housing, and the entire driver can be advanced through the endoscope to deploy the jaws. This nesting allows the complex mechanism to pass through the constrained endoscope channel while maintaining its functional integrity.
2Adaptability or versatility
If traditional clips are used for closing perforations, then the device is simple, but the capability to grasp tissue is limited resulting in incomplete closure
Solution Approach 1:
The biasing strip includes multiple projections with different geometries and orientations designed to engage different types of tissue. The projections can be configured with varying sharpness, length, and angular orientation to adapt to specific tissue characteristics such as gastric wall thickness and elasticity. This local variation in engagement features enhances the device's ability to grasp diverse tissue types effectively.
Solution Approach 2:
The jaws are designed to rotate relative to each other from a parallel configuration to a crossed configuration, allowing dynamic adaptation to the tissue being closed. The biasing strip projections can flex and deform under tissue load, and the jaw orientation can be adjusted during deployment to optimize grasping of the perforation edges. This dynamic capability enables incomplete closures to be converted into complete closures.
3Reliability
If conventional hemostatic devices are used, then the device structure is simple, but they are not strong enough for permanent hemostasis
Solution Approach 1:
The biasing strip projections are pre-configured with sharp distal ends and specific angular orientations to pierce and engage tissue immediately upon deployment. The projections are positioned and oriented beforehand to ensure optimal tissue penetration and grasping force from the moment the jaws close, eliminating the need for gradual tissue engagement and ensuring immediate, permanent hemostasis.
Solution Approach 2:
The device combines multiple materials with different properties: the biasing strip may use a resilient material that flexes during engagement, the jaw tips may use a harder material for piercing and grasping, and the overall structure may incorporate shape-memory alloys or other advanced materials to maintain gripping force under varying physiological conditions. This composite approach ensures reliable, permanent hemostasis through material property optimization.
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 a strong and effective means of achieving permanent hemostasis with improved tissue engagement, reducing the need for invasive surgery and enhancing the capability to grasp and close tissue effectively.
Implementation Method 1
The biasing strip includes at least one projection extending radially inwardly towards the longitudinal axis, the at least one projection sized and structured to engage the tissue between the first and second jaws
Implementation Method 2
The biasing strip is operatively connected to at least one of the first and second jaws to bias the jaws radially
Implementation Method 3
The driver is engaged with the proximal ends of the first and second jaws, whereby 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. The medical device of the system may include a biasing strip engaged with the jaws, and/or a gripping strip attached to at least one of the jaws to improve the engagement of the tissue between the jaws.