Compact Syringe Pump with Segmented Plunger and Leadscrew
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Solution Overview
Problem
The existing drug delivery systems require large pumps to accommodate large syringes, leading to space inefficiencies in patient rooms, necessitating a compact solution for medication delivery.
Innovation Solution
A compact syringe pump system with a specialized syringe design, featuring a housing with a flange holder, electrical motor, gears, leadscrew, and force sensing plate, which allows for precise and accurate medication delivery using a reduced-sized pump and syringe with multiple plunger supports and markings, enabling secure and efficient drug administration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If large syringes are used for drug delivery, then the drug delivery capacity is improved, but the pump size increases
Solution Approach 1:
The plunger is divided into multiple segments with individual supports that engage with the leadscrew at different positions. This segmentation allows the plunger to be controlled by a compact leadscrew mechanism while still accommodating large syringe volumes, resolving the contradiction between drug delivery capacity and pump size.
Solution Approach 2:
The invention transitions from a direct linear drive mechanism to a rotational leadscrew mechanism, changing the dimensional approach to plunger control. The leadscrew converts rotational motor motion into linear plunger motion, enabling compact pump design while maintaining the ability to deliver large volumes of medication.
2Area of stationary object
If compact pump design is implemented, then space efficiency is improved, but control precision over plunger movement may deteriorate
Solution Approach 1:
Force sensing plates are incorporated into the plunger supports to provide feedback on the force applied to the plunger. This feedback mechanism enables precise control of plunger movement and drug delivery rate, maintaining manufacturing precision even in the compact pump design.
Solution Approach 2:
The invention replaces traditional mechanical linkages with a leadscrew mechanism driven by an electrical motor. This substitution provides more precise control over plunger movement through controlled rotation, maintaining precision while reducing the overall pump footprint.
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 system enables efficient and accurate medication delivery with a reduced footprint, allowing for smaller pump sizes while maintaining precise control over plunger movement and force application, thus optimizing space usage in patient rooms.
Implementation Method 1
a leadscrew with a leadscrew shaft connected to the plurality of gears
Implementation Method 2
a force sensing plate mounted on a mounting support inside the housing
Data Source
AI summary
A system comprises a syringe pump and a special designed syringe. The syringe pump includes a housing with a flange holder for receiving a flange of the syringe barrel, an electrical motor disposed inside the housing, a plurality of gears driven by the electrical motor, a leadscrew connected to the plurality of gears, and a cage housing for housing the leadscrew and for holding at least partially the plunger. The flange of the plunger inserts into the flange holder, the leadscrew engages the plunger and moves the plunger in and out of the syringe.