Needle-Guided Syringe Actuation for Precise Multi-Site Dosing
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Solution Overview
Problem
Existing injection devices lack precision in delivering a defined dose of injectable substances, particularly for treatments like stress urinary incontinence, leading to potential tissue damage and variability in clinical studies.
Innovation Solution
An injection device with a dosing unit that ensures a predetermined displacement of the syringe plunger, coupled with a needle guide and imaging device, allowing for precise, dosed injections at multiple sites, and optionally includes a cooling tool for maintaining the integrity of the injectable substance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a needle guide with predetermined position is used for injection, then the positioning of the injection needle is improved, but the precision in delivering a defined dose deteriorates
Solution Approach 1:
The injection device is divided into separate functional modules: a needle guide module for positioning and an actuating unit module for dose control. The actuating unit includes a lever mechanism that is independently adjustable from the needle guide, allowing each module to optimize its function without compromising the other.
Solution Approach 2:
The actuating unit incorporates a lever with adjustable displacement range, enabling dynamic adaptation of the injection dose. The lever can be positioned at different angles relative to the syringe plunger, allowing the operator to precisely control the volume of injectable substance delivered while maintaining accurate needle positioning.
2Device complexity
If manual injection without dosing control is used, then the device complexity is reduced, but the dosing precision and repeatability deteriorate
Solution Approach 1:
The actuating unit is designed to automatically control the syringe plunger displacement when the lever is actuated. The mechanical linkage between the lever and plunger ensures that a specific lever movement range translates directly into a predetermined plunger displacement, eliminating the need for manual estimation and improving dose repeatability without requiring complex electronic controls.
3Adaptability or versatility
If repeated injections at multiple sites are performed, then the therapeutic coverage is improved, but the time consumption and operational complexity increase
Solution Approach 1:
The injection device combines a reusable actuating unit with interchangeable syringes and needle guides, allowing the same core mechanism to perform multiple injection tasks at different anatomical sites. The standardized interface enables quick changes between syringes and needle guides without requiring reconfiguration of the dosing mechanism, facilitating efficient multi-site injections.
Data Source
AI summary
Provided is an injection device for injection of a substance with an syringe into an organism, comprising a holding unit, which is adapted to hold the syringe, an actuating unit, which is adapted for dosed injection of the injection substance and which is removably coupled to the holding unit and couplable with the syringe when the holding unit holds the syringe, a needle guide which is adapted to be removably couplable with an injection needle and for changing the injection position of the injection needle; and a connection structure which connects the holding unit and the needle guide.