Threaded Plunger Syringe with Tactile Feedback Control
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Solution Overview
Problem
Existing syringes lack precise control and feedback mechanisms for delivering small volumes of fluid, particularly in cell therapy applications, making it difficult to accurately dispense predetermined amounts of fluid, such as microliters, during medical procedures like neurodegenerative disease treatments.
Innovation Solution
The development of threaded plunger syringes equipped with a tactile feedback mechanism that provides physical feedback for each predetermined fluid volume dispensed, allowing for precise control through a rotatable control knob that engages or disengages with the threaded plunger, enabling precise longitudinal movement without rotation, and compatibility with biocompatible materials for medical use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional syringe with manual plunger depression is used, then the device is simple to operate, but precise control of small fluid volumes cannot be achieved
Solution Approach 1:
The syringe is divided into functionally distinct components: a control knob for rotation, a threaded plunger for linear movement, and a syringe body. This segmentation allows the control knob to provide precise rotational control that translates to controlled linear plunger movement, enabling precise fluid delivery while keeping each component relatively simple
Solution Approach 2:
The invention changes the control parameter from direct linear plunger depression to rotational movement of a control knob. The threaded engagement between the control knob and plunger converts rotational motion into precise linear displacement, allowing for more controlled and measurable fluid delivery of small volumes
2Manufacturing precision
If a threaded plunger mechanism is added for precise control, then fluid delivery precision is improved, but tactile feedback for volume dispensed is lost
Solution Approach 1:
The control knob incorporates tactile feedback features such as detents or mechanical stops that provide the operator with sensory feedback during rotation. This feedback mechanism informs the user of the plunger's position and the volume of fluid dispensed, maintaining the information loop without compromising the precision of the threaded control mechanism
3Manufacturing precision
If the threaded plunger is engaged for precise delivery, then control is improved, but the ability to manually draw fluid in is reduced
Solution Approach 1:
The syringe system allows dynamic switching between two operational modes: threaded engagement mode for precise delivery control, and disengaged mode for easy manual aspiration. The control knob can be rotated to engage the threads for controlled delivery, or disengaged to allow free plunger movement for drawing fluid into the syringe, providing operational flexibility
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
Enables precise and controlled delivery of small fluid volumes, providing tactile feedback for accurate dispensing, enhancing the usability in medical procedures like cell therapy, particularly for neurodegenerative disease treatments, while ensuring biocompatibility and safety.
Implementation Method 1
a control knob rotatably connected to the control base, wherein the control knob is configured to engage with threads of the threaded plunger such that rotation of the control knob with respect to the control base causes the threaded plunger to move longitudinally in the syringe body
Implementation Method 2
wherein the syringe body mount is configured to provide tactile feedback to an operator of the syringe when a predetermined amount of fluid volume is dispersed from the syringe
Data Source
AI summary
The present disclosure is directed to threaded plunger syringes with tactile feedback mechanisms and method of using such syringes. The syringes can include a first configuration, wherein the threads of the threaded plunger are engaged by the syringe such that fluid delivery can be precisely controlled, and a second configuration, wherein the threads of the threaded plunger are not engaged such that the syringe can act similar to that of a conventional plunger syringe. In addition, the syringes can include a tactile feedback mechanism that provides tactile feedback when a predetermined amount of fluid volume is dispersed.