Multisite Injection Catheter With Controlled Multi-Needle Delivery

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Solution Overview

Problem

Current multisite injection techniques rely on a single needle for multiple injections, requiring manual re-puncturing and lack a mechanism for controlled and effective dispersion of medication.

Innovation Solution

A device with multiple needles and containers, allowing simultaneous or sequential injection of controlled amounts of fluid through a catheter system, including a splitter to guide needle placement and a controller for fluid management.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If a single needle is used for multiple injections, then the device complexity is reduced, but the manufacturing precision and control of injected fluid amount deteriorate

Engineering Contradiction:

Improvedevice complexityVSAvoidcontrolled amount of fluid

Core Design Contradiction:

Device complexityVSManufacturing precision

Solution Approach 1:

The single needle is divided into multiple needles (first needle, second needle, third needle) that can be independently controlled. Each needle is connected to its own lumen within the catheter, allowing separate control of fluid injection for each site while maintaining a unified catheter structure.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The catheter acts as an intermediary structure that holds multiple needles and provides a common fluid pathway system. The catheter includes multiple lumens that serve as intermediaries to deliver controlled fluid amounts to each needle site independently while maintaining overall system integration.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of operation

If manual re-puncturing is used for each injection site, then the ease of operation is improved, but the productivity and time efficiency deteriorate

Engineering Contradiction:

Improveease of operationVSAvoidinjection speed

Core Design Contradiction:

Ease of operationVSProductivity

Solution Approach 1:

The catheter is pre-configured with multiple lumens and needles positioned at predetermined locations before insertion. This preliminary arrangement eliminates the need for manual re-puncturing at each site during the procedure, as the multi-site injection capability is already prepared in advance.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system enables continuous injection operation across multiple sites simultaneously or sequentially without interruption. The controller can manage fluid delivery to multiple needles in sequence, maintaining continuous therapeutic action without the time loss associated with removing and repositioning needles between sites.

Inventive Principle:

Principle #20Continuity of useful action

3Device complexity

If a single needle delivers medication to multiple sites, then the device complexity is reduced, but the effectiveness of medication dispersion deteriorates

Engineering Contradiction:

Improvedevice complexityVSAvoideffective dispersion of medication

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The single needle function is segmented into multiple independent needles, each capable of delivering medication to a separate injection site. This segmentation ensures that medication is dispersed effectively across multiple locations rather than requiring a single needle to reach multiple sites through complex maneuvers.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system transitions from a single-point injection approach to a multi-point spatial distribution approach. By positioning multiple needles at different locations within the catheter, the medication delivery is extended across multiple spatial dimensions, improving dispersion effectiveness without requiring excessive device complexity.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

4Ease of operation

If physician technique relies on manual control for each injection, then the ease of operation is improved, but the measurement precision of injected fluid amount deteriorates

Engineering Contradiction:

Improveease of operationVSAvoidaccurate amount of medication

Core Design Contradiction:

Ease of operationVSMeasurement precision

Solution Approach 1:

The controller receives feedback signals from sensors that monitor fluid delivery to each needle. This feedback mechanism allows the system to automatically adjust and verify the amount of medication injected at each site, ensuring measurement precision without requiring the physician to manually measure and control each injection individually.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

Manual mechanical control of fluid delivery is replaced with an automated control system. The controller uses electronic signals to regulate fluid flow to each needle, substituting the physician's manual technique with a precision control mechanism that ensures accurate medication amounts while maintaining ease of operation through automated management.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS20250288751A1Devices and methods for simultaneous multisite injection

Publication Date: 2025.09.18 ONEPASS MEDICAL LTD

AI summary

A device for multisite injection is disclosed. The device comprises, a first container in fluid connection with at least two needles; a second container in fluid connection with at least one needle; and an injection unit configured to inject an injection fluid from the first container and the second container via all the needles.