Puncture System Fixing Element for Catheter Stability
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Solution Overview
Problem
Existing puncture systems for central venous catheters lack a reliable mechanism to securely fix the layers relative to each other, leading to undesired movements during insertion and potential trauma, and fail to prevent fluid exchange between the inner and outer tubular bodies.
Innovation Solution
A puncture system with a manually actuatable fixing element that reduces or cancels the longitudinal displaceability of the inner and outer tubular bodies and the puncture needle, featuring a clamping mechanism, sealing element, and a dilation body with a tapered design to facilitate insertion without additional widening of the puncture site.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the puncture system allows longitudinal displaceability of the inner tubular body and puncture needle during insertion, then the ease of operation is improved, but the stability and precision of the procedure deteriorates due to undesired movements
Solution Approach 1:
The puncture system employs a dynamic fixing element that can transition between a released state (allowing longitudinal displaceability during insertion) and a fixed state (preventing undesired movements during the procedure). This dynamic adjustment resolves the contradiction by providing the needed mobility during insertion while ensuring stability during the procedure.
2Adaptability or versatility
If the puncture system uses multiple displaceable layers for flexible insertion, then the adaptability is improved, but the reliability deteriorates due to potential fluid exchange between layers
Solution Approach 1:
The invention extracts the sealing function from the displaceable tubular layers by introducing a separate sealing element that prevents fluid exchange between the inner and outer tubular bodies. This allows the layers to remain displaceable for adaptability while the dedicated sealing element ensures reliability by blocking fluid pathways between layers.
3Device complexity
If the puncture system lacks a fixing mechanism, then the device complexity is reduced, but the manufacturing precision deteriorates due to inability to secure accurate positioning
Solution Approach 1:
The fixing element acts as an intermediary component that connects the inner and outer tubular bodies, enabling precise positioning and secure fixation without requiring complex integrated mechanisms. This separate fixing mechanism maintains relative simplicity while achieving the needed positioning accuracy.
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
Enhances user safety and ease of application by stabilizing the system during insertion, preventing fluid exchange, and allowing for secure positioning of the puncture needle and tubular bodies, reducing the risk of trauma and improving the accuracy of the procedure.
Implementation Method 1
a dilation body with a tapered design to facilitate insertion without additional widening of the puncture site
Implementation Method 2
a manually actuatable fixing element which can be moved by manual actuation at least into a fixing position and into a release position, wherein, in the fixing position, the longitudinal displaceability of the inner tubular body relative to the outer tubular body and/or of the puncture needle relative to the inner tubular body is canceled or reduced
Implementation Method 3
a sealing element by which the inner tubular body is sealed off relative to the outer tubular body at least at the end near the patient
Data Source
AI summary
The invention relates to a puncture system having an outer tubular body which is designed to remain in a body part of a living being, said puncture system comprising at least one inner tubular body and a puncture needle, wherein the inner tubular body is guided through a working lumen of the outer tubular body and is longitudinally displaceable relative to the outer tubular body, and the puncture needle is guided through a puncture lumen of the inner tubular body and the inner tubular body is longitudinally displaceable relative to the puncture needle. The puncture system has a manually actuatable element that can be moved by manual actuation at least into a fixing position and into a release position, wherein, in the fixing position, the longitudinal displaceability a1) of the inner tubular body relative to the outer tubular body and/or a2) of the puncture needle relative to the inner tubular body and/or a3) of the puncture needle relative to the outer tubular body is removed or reduced.