Sheath Device Clamping Mechanism for Catheter Insertion
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Solution Overview
Problem
Existing sheath devices for inserting catheters into patients' bodies are complex, sensitive, and prone to mechanical stress, making them unreliable and risky for both patients and medical devices.
Innovation Solution
A sheath device comprising a first sheath with a clamping element that securely holds a second sheath and a catheter, allowing for coaxial orientation and axial fixation, thereby facilitating the transfer of a precompressed functional element, such as a pump, from the second sheath into the first sheath.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sheath device is used to insert catheters and functional elements into patients' bodies, then the risk of tissue traumatization and device damage is minimized, but the device complexity and sensitivity increase, making the procedure unreliable and high-risk
Solution Approach 1:
The sheath device is divided into multiple independent sections: an outer sheath for initial insertion, an inner sheath for holding the functional element, and a clamping mechanism for securing components. This segmentation allows each part to perform its specific function independently, reducing overall system complexity while maintaining reliability.
Solution Approach 2:
The inner sheath is nested within the outer sheath, and the functional element (such as a compressed pump) is nested within the inner sheath. This nested configuration allows for compact storage and systematic deployment of multiple components through a single access point, simplifying the insertion procedure while protecting all components simultaneously.
2Object-affected harmful factors
If the sheath device is designed to hold and transfer precompressed functional elements, then the functional elements can be inserted with minimal tissue damage, but the mechanical stress on components increases, making the procedure sensitive and unreliable
Solution Approach 1:
The functional element (such as a pump) is precompressed to a reduced diameter before insertion, allowing it to pass through the sheath without causing tissue damage. The compression is applied in advance during device preparation, and the element automatically expands to its functional shape upon deployment at the target location, eliminating the need for forceful insertion.
Solution Approach 2:
The sheath acts as an intermediary protective structure that maintains the compressed state of the functional element during insertion and provides a controlled environment for deployment. The sheath's lumen serves as a protected passage that isolates the functional element from external mechanical stresses until it is ready for deployment.
3Stability of the object's composition
If the sheath device uses a clamping element to secure the second sheath and catheter, then coaxial orientation and axial fixation are achieved, but the device complexity increases
Solution Approach 1:
The clamping mechanism replaces complex mechanical alignment systems with a simpler friction-based or elastic deformation-based clamping element. This element secures the second sheath and catheter through radial compression, achieving stable coaxial orientation and axial fixation without requiring intricate mechanical linkages or adjustment mechanisms.
Data Source
AI summary
A sheath device for inserting a catheter into a patient's body is described. The device has a first sheath with a proximal end and a distal end. When the device is used as intended, the distal end of the first sheath is provided for arrangement in the patient's body and the proximal end of the first sheath is provided for arrangement outside the patient's body. The first sheath comprises a tubular section and a sheath housing, which is disposed at the proximal end of the section and has a receiving channel for a strand-shaped body. The device solves the problem of reliably fixing a second sheath or a catheter with respect to the first sheath by providing a clamping element on the receiving channel for fixing a strand-shaped body in the receiving channel by way of clamping.