Cannula Insertion Safety Mechanism for Force-Triggered Retraction

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Solution Overview

Problem

Existing automated cannula insertion systems risk damaging tissues due to sudden movements or misalignments, which can cause unintended forces perpendicular or parallel to the insertion direction, leading to potential harm to blood vessels and surrounding tissues.

Innovation Solution

A cannula insertion system with a safety device that automatically retracts or releases the cannula when forces exceeding safety thresholds in perpendicular or parallel directions are detected, using a cannula holder with a detent mechanism and a retraction device to minimize tissue damage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Extent of automation

If automated cannula insertion is performed without safety monitoring, then insertion speed and automation level are improved, but tissue damage risk increases due to sudden movements or misalignments

Engineering Contradiction:

Improveautomation levelVSAvoidtissue damage risk

Core Design Contradiction:

Extent of automationVSObject-affected harmful factors

Solution Approach 1:

The safety device is configured in advance to monitor forces during cannula insertion and automatically retract or release the cannula when predetermined safety thresholds are exceeded, preventing tissue damage before it occurs

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system continuously monitors forces exerted on the cannula during insertion and provides real-time feedback to the control mechanism, enabling dynamic adjustment of insertion parameters and automatic safety intervention when abnormal forces are detected

Inventive Principle:

Principle #23Feedback

2Object-affected harmful factors

If force monitoring in perpendicular direction is implemented, then tissue damage prevention is improved, but device complexity increases due to additional sensors and control mechanisms

Engineering Contradiction:

Improvetissue damage preventionVSAvoiddevice complexity

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The safety device monitors forces in both perpendicular and parallel directions using integrated sensor systems, enabling multi-directional protection against tissue damage while maintaining a unified control architecture that manages complexity

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Reliability

If safety device with force threshold monitoring is added, then reliability is improved, but device complexity increases due to additional components

Engineering Contradiction:

Improvesafety reliabilityVSAvoiddevice complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

Safety thresholds are pre-configured in the control system, and the safety device is pre-configured to automatically activate when these thresholds are exceeded, ensuring reliable protection without requiring complex real-time decision algorithms

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The safety device autonomously monitors forces, compares them against predetermined thresholds, and triggers retraction or release mechanisms without requiring external intervention, achieving high reliability through self-contained operation

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS12527503B2Cannula insertion system

Publication Date: 2026.01.20 VITESTRO HLDG BV

AI summary

A cannula insertion system for inserting a cannula into a human or animal body, includes a cannula and a cannula insertion device to hold and insert the cannula into the human or animal body in an insertion direction. The cannula insertion system includes a safety device configured to retract the cannula or to release the cannula from the cannula insertion device when a force exerted on the cannula in a direction perpendicular