IV Catheter Sliding Shield Mechanism for Blood Splatter Prevention
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Solution Overview
Problem
Existing IV catheter devices expose the needle tip temporarily during withdrawal, leading to blood splatter and enhanced safety risks despite having a safety mechanism.
Innovation Solution
A safety mechanism with a slider that couples to a catheter adapter and slides relative to a barrel, retracting the needle hub within the barrel upon trigger, securing the needle tip inside the slider after use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a safety mechanism with needle hub retraction is used, then needle tip exposure is reduced, but temporary exposure during withdrawal still occurs leading to blood splatter
Solution Approach 1:
The slider is pre-configured in a retracted position that automatically shields the needle tip as soon as the needle hub begins to retract, eliminating the time delay between hub retraction and tip shielding that causes blood splatter in conventional designs
Solution Approach 2:
The slider acts as an intermediary component between the needle hub and the needle tip, providing continuous physical coverage of the tip during the entire hub retraction process and preventing direct exposure to blood splatter hazards
2Reliability
If the needle hub is retracted within the barrel, then needle tip is secured, but the mechanism requires complex slider and spring components
Solution Approach 1:
The slider combines multiple functions into a single component: it guides the needle hub retraction, shields the needle tip, and works with the spring to maintain continuous coverage, reducing the need for separate complex mechanisms for each function
Solution Approach 2:
The spring-loaded slider mechanism automatically activates and operates through the natural retraction motion of the needle hub, requiring no additional actuators or complex control systems while ensuring reliable needle tip security
Data Source
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AI summary
An intravenous catheter device can include a safety mechanism having a slider that couples to a catheter adapter and slides relative to a barrel. A needle hub can be contained within the barrel and can be retracted once a catheter has been inserted into the patient's vasculature. The retraction of the needle hub can be triggered by the sliding of the slider. The slider may also function to guard the distal tip of the needle once the needle hub is retracted within the barrel.