Catheter Position Markings for Early Dislodgement Detection

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Solution Overview

Problem

Catheters frequently become dislodged due to improper securement or patient movement, leading to inconvenient line restarts, increased risk of sharps injuries, and potential complications such as phlebitis, infiltration, infection, and even patient death.

Innovation Solution

A catheter assembly with a position indicator, featuring markings on the tubing to indicate catheter position relative to the vasculature, which can alert clinicians to dislodgement through visual or automated means, allowing for immediate corrective action.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a catheter is secured in the vasculature, then the catheter remains in place for fluid infusion and blood withdrawal, but the catheter may become dislodged due to patient movement or improper securement

Engineering Contradiction:

Improvecatheter position stabilityVSAvoidpatient comfort and mobility

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent applies preliminary action by providing position indicators (markings) on the catheter before insertion. These markings allow clinicians to establish a reference position at the skin surface that corresponds to the catheter tip position in the vasculature. This pre-established reference enables later detection of dislodgement without requiring additional securement measures that would restrict patient movement.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If the catheter is firmly secured to prevent dislodgement, then catheter position stability improves, but patient comfort decreases due to restricted movement

Engineering Contradiction:

Improvecatheter position stabilityVSAvoidpatient discomfort and mobility restriction

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent implements feedback by using position indicators that provide continuous visual information about catheter position relative to the skin surface. When the catheter moves or becomes dislodged, the position of the markings relative to the skin changes, providing immediate feedback to the clinician or patient. This eliminates the need for firm securement while maintaining catheter position stability through monitoring.

Inventive Principle:

Principle #23Feedback

3Object-affected harmful factors

If catheter dislodgement occurs, then patient safety is compromised due to potential complications, but frequent monitoring increases device complexity

Engineering Contradiction:

Improvepatient safetyVSAvoidmonitoring system complexity

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The patent applies self-service by making the catheter itself provide the monitoring function through integrated position indicators. The markings on the catheter tubing serve as built-in detection elements that automatically indicate position changes. This eliminates the need for separate external monitoring devices or complex sensor systems, reducing device complexity while maintaining patient safety through easy visual assessment.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS20260000869A1Catheter position indicator and related systems and methods

Publication Date: 2026.01.01 BECTON DICKINSON & CO

AI summary

A catheter assembly may include a catheter adapter having a catheter extending from its distal end. The catheter may include a proximal end, a tip, and a length of tubing therebetween. The length of tubing may include one or more position indicators to indicate a position of the catheter relative to a vasculature. The catheter assembly may include an introducer needle extending through the length of tubing and comprising a sharp distal tip configured to introduce the catheter into the vasculature.