Blood Draw Introducer Tactile Feedback for Flow Tube Positioning
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Solution Overview
Problem
Existing blood draw devices for peripheral intravenous catheters (PIVCs) provide inadequate tactile feedback, leading to vibrations that interfere with the user's ability to distinguish the position of the flow tube relative to the vein, especially when encountering obstructions or resistance.
Innovation Solution
The blood draw device incorporates an introducer with a smooth and ridged surface configuration, along with an actuator featuring a tab that provides tactile and audible feedback as it reaches specific points on the introducer, such as convex and concave features, to enhance user feedback and prevent unwanted movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If ridges are formed across a substantial portion of the introducer to provide tactile feedback, then tactile feedback is improved, but vibrations are generated that interfere with the user's ability to distinguish tactile feedback from flow tube contact
Solution Approach 1:
The introducer surface is segmented into distinct zones: a first portion with ridges for tactile feedback and a second portion without ridges to minimize vibrations. This segmentation allows the device to provide tactile feedback when needed while reducing harmful vibrations in other areas.
Solution Approach 2:
Different portions of the introducer have different surface qualities - the first portion has ridges for tactile feedback while the second portion has a smooth surface to reduce vibrations. This local differentiation optimizes each zone for its specific function.
2Measurement precision
If ridges extend across a substantial portion of the introducer to indicate flow tube position, then tactile feedback is enhanced, but the user's ability to distinguish ridge transitions from vein contact is reduced
Solution Approach 1:
The introducer is divided into a first portion with ridges for position indication and a second portion without ridges. This segmentation creates a clear transition point that helps users distinguish between ridge transitions and actual vein contact points.
Solution Approach 2:
The ridges are provided only in a first portion of the introducer rather than across the entire length, providing sufficient tactile feedback for position indication while avoiding excessive ridges that would create confusion and unwanted vibrations.
Data Source
AI summary
A blood draw device including an introducer and an actuator. The introducer has a proximal end portion, a distal end portion, and an inner volume, and includes a top surface having a first portion of a first length and a second portion of a second length. The first portion may have a smooth surface along the first length and the second portion has a plurality of ridges along the second length. The actuator includes an exterior portion positioned above the top surface and an interior portion positioned within the inner volume, wherein the exterior portion of the actuator includes an engagement member and a downwardly-extending tab projecting below the engagement member such that the downwardly-extending tab of the actuator may contact at least the plurality of ridges of the second portion of the introducer to provide at least one of tactile and audible feedback to a user.