Handheld Viscous Fluid Injection Device with Automated Pump

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Solution Overview

Problem

Current methods for delivering viscous fluids, such as pain medications and fillers, into dense tissues like those in the knee, hip, and face are inefficient due to the high resistance and difficulty in expelling viscous fluids from syringes, requiring higher pressure and more time.

Innovation Solution

The development of hand-held apparatuses that can deliver multiple doses of pre-set volumes and pressures of viscous materials, featuring a manifold with a selection channel, check valves, and piston chambers, allowing for easy aspiration and injection with reduced operator effort.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If hand-held syringes are used to deliver viscous fluids, then the device is simple and portable, but the operator experiences high strain and difficulty in expelling viscous fluids

Engineering Contradiction:

Improveease of expelling viscous fluidVSAvoidoperator hand strain

Core Design Contradiction:

Ease of operationVSForce

Solution Approach 1:

The patent replaces manual mechanical syringe operation with an automated pump system that uses a drive shaft and rotor to mechanically expel viscous fluids. This substitution eliminates the need for the operator to manually push viscous fluid through the syringe, thereby reducing hand strain while maintaining the ability to deliver viscous fluids effectively.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces an intermediary pump mechanism between the fluid reservoir and the injection site. This intermediary system (comprising the pump, drive shaft, and rotor) acts as a mediator that handles the difficult task of expelling viscous fluids, allowing the operator to simply control the device without experiencing direct mechanical strain.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Productivity

If higher pressure is applied to expel viscous fluids, then the fluid delivery speed increases, but the time required for injection increases due to resistance

Engineering Contradiction:

Improveinjection speedVSAvoidinjection time

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The automated pump system replaces manual high-pressure syringe operation with a controlled mechanical pumping mechanism. The pump delivers viscous fluids at consistent, controlled rates without requiring the operator to apply progressively higher pressures, thereby maintaining injection speed while avoiding the time-consuming resistance issues associated with manual high-pressure syringing.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The pump system provides continuous, steady delivery of viscous fluids through the drive shaft and rotor mechanism. This continuous action eliminates the interruptions and variability inherent in manual syringe operation, maintaining optimal injection speed throughout the procedure without the time losses associated with manual pressure adjustment.

Inventive Principle:

Principle #20Continuity of useful action

3Measurement precision

If multiple devices are used for verification and injection, then the treatment accuracy is improved, but the working area becomes crowded with equipment

Engineering Contradiction:

Improvetreatment region verification accuracyVSAvoidnumber of devices

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent merges the verification and injection functions into a single integrated device. The verification component (with electrodes for electrical stimulation) and injection component (with pump and fluid delivery system) are combined in one unit, eliminating the need for separate verification devices and reducing equipment crowding in the working area.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The device is designed with multi-functionality, serving both as a verification tool (through electrical stimulation capability) and an injection device (through the pump and fluid delivery system). This universal design allows a single device to perform multiple functions that would traditionally require separate pieces of equipment.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

These apparatuses simplify the injection process, reducing the time and effort required for delivering viscous fluids into resistant tissues, while also minimizing the strain on the operator's hands.

Implementation Method 1

a pump configured to negatively displace the liquid pharmaceutical to aspirate fluid from the patient

Methodology Applied

Scientific EffectNegative displacement: Pump

Implementation Method 2

a pump configured to positively displace the liquid pharmaceutical to inject it into the patient

Methodology Applied

Scientific EffectPositive displacement: Pump

Implementation Method 3

The injection wand may include a transparent portion that allows visualization of aspirated fluid

Methodology Applied

Scientific EffectLight transmission: Reflection

Data Source

PatentUS20250025637A1Aspiration and injection devices

Publication Date: 2025.01.23 VELOJECT LLC

AI summary

Systems and methods for continuous injection of fluid. In some examples these apparatuses may include a manifold, a pair of reciprocating pistons, and an actuation control that may apply both suction (aspiration) and injection of fluid as part of the same actuation.