Injection Simulator Plunger Speed Control via Damping Fluid
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Solution Overview
Problem
Existing injection training devices struggle to accurately simulate the varying resistance encountered during injections of medications with different viscosities, making it challenging to replicate the experience for increasingly viscous medicaments, which affects the training effectiveness and user confidence in administering injections.
Innovation Solution
An injection simulation device with a rotatable component and stationary component, utilizing a damping fluid to control resistance, where distal movement of the plunger increases resistance due to rotational movement and proximal movement decreases it, mimicking the forces required for medicament delivery and reset, thereby enhancing the training experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional injection training device is used, then the device structure is simple, but it cannot accurately simulate the varying resistance of medications with different viscosities
Solution Approach 1:
The patent applies the dynamics principle by implementing a rotatable component that can change its rotational state during plunger movement. The rotatable component includes a ratchet mechanism that allows rotation in one direction during distal movement (injection phase) and prevents reverse rotation during proximal movement (retraction phase), creating dynamically changing resistance that simulates different medication viscosities.
Solution Approach 2:
The patent applies parameter changes by varying the resistance parameter throughout the injection cycle. The damping fluid's resistance effect changes based on the rotational position and speed of the rotatable component, allowing the device to simulate different viscosity parameters for different medication types by controlling the rotational dynamics of the component.
2Reliability
If the plunger moves quickly through the injection, then the injection time is short, but it does not accurately reflect the resistance experienced with viscous medications
Solution Approach 1:
The rotatable component creates dynamic resistance that varies during the injection process. As the plunger moves distally, the rotatable component rotates and interacts with the damping fluid, creating time-dependent resistance that slows the injection process to realistically simulate viscous medication delivery, thereby extending injection time appropriately.
Solution Approach 2:
The damping fluid acts as an intermediary between the plunger and the rotatable component, mediating the resistance force. The fluid's damping effect, combined with the rotational mechanics, creates a controlled resistance that extends injection time while accurately reflecting the forces experienced with viscous medications.
3Reliability
If a rotatable component with damping fluid is added to control plunger speed, then the resistance simulation improves, but the device complexity increases
Solution Approach 1:
The rotatable component serves multiple functions simultaneously: it acts as a resistance element, a speed control mechanism, and a simulation of medication viscosity effects. The ratchet mechanism within the rotatable component provides both unidirectional rotation control and mechanical engagement, reducing the need for separate components and justifying the added complexity through multi-functionality.
Solution Approach 2:
The patent employs hydraulic principles by using a damping fluid within the rotatable component to control plunger speed and resistance. The damping fluid creates viscous resistance that naturally regulates the rotation speed and plunger movement, providing smooth, controlled resistance simulation without requiring complex mechanical valve systems or additional control mechanisms.
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
The device effectively simulates the forces involved in injecting medications of varying viscosities, providing a realistic training experience that reduces anxiety and improves the chances of successful medicament delivery by familiarizing users with the resistance patterns, thus enhancing user proficiency and confidence.
Implementation Method 1
a stationary component defining a cavity comprising a damping fluid, the cavity for receiving the rotatable component, wherein advancing the plunger in a distal direction causes rotational movement of the rotatable component, wherein that rotational movement is controlled by the damping fluid, increasing plunger resistance
Implementation Method 2
an interface between the rotatable component and the stationary component causes an increase in resistance during distal movement of the plunger
Implementation Method 3
when the plunger is moved in the distal direction, the at least one protrusion member increases a friction during movement of the plunger in the distal direction
Data Source
AI summary
In an embodiment, an injection simulation device is provided. The injection simulation device may include a housing defining an opening, the housing having a proximal end and a distal end, a plunger movable relative to the housing, the plunger comprising a first interfacing portion, and distal movement of the plunger initiates an injection simulation, a rotatable component comprising a proximal end and a distal end, and an aperture extending between the proximal and distal ends of the rotatable component for receiving a portion of the plunger, rotatable component comprising a second interfacing portion for interfacing with the first interfacing portion to rotate the rotatable component when the plunger is moved toward the proximal or distal end of the housing. The injection simulation device may further include a stationary component defining a cavity for receiving the rotatable component, the cavity comprising a fluid, wherein movement of the plunger causes rotational and axial movement of the rotatable component, such that an interface between the rotatable component and the stationary component causes an increase in resistance during distal movement of the plunger, and a decrease in resistance occurs upon proximal movement of the plunger.