Adjustable Syringe Guide for Precise Needle Depth Control
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Solution Overview
Problem
Healthcare professionals face challenges in administering injectables or aspirating with accuracy due to tremulous hands, patient discomfort, and the need for precise needle placement, which often requires a second person for stability and can result in over penetration or incorrect tissue targeting.
Innovation Solution
An adjustable syringe guide with a syringe receiver, depth guide, and depth adjustment mechanism that allows for controlled needle depth and angular delivery, enabling precise needle placement and easy syringe exchange without removing the needle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If visual means are used for depth and angular delivery, then the procedure can be performed with simple equipment, but accuracy and precision of needle placement are insufficient
Solution Approach 1:
A depth guide device is introduced as an intermediary between the syringe and patient body. The depth guide includes a reference surface that contacts the patient body and a depth stop that limits needle penetration depth, providing mechanical guidance to achieve precise needle placement without complex imaging equipment
Solution Approach 2:
The depth guide is prepared in advance with the reference surface positioned at the desired injection site and the depth stop adjusted to the required penetration depth before needle insertion. This preliminary setup ensures accurate needle placement without requiring complex real-time adjustments during the procedure
2Stability of the object's composition
If the syringe is held manually without support, then the device structure remains simple, but stability and accuracy of injection are compromised due to tremulous hands or patient movement
Solution Approach 1:
The support structure is segmented into modular components: a base that contacts the patient body, a vertical support member, and a depth guide assembly. This segmentation allows the structure to provide stable support while remaining simple and adaptable to different injection sites
Solution Approach 2:
The depth guide device is designed to be self-aligning and self-stabilizing. The reference surface automatically contacts the patient body to establish the correct position, and the depth stop automatically limits needle penetration, eliminating the need for complex active control systems
3Ease of operation
If the needle is removed and reinserted for multiple punctures, then the procedure can be simplified, but patient discomfort and risk of incorrect tissue targeting increase
Solution Approach 1:
The depth guide is set up with the reference surface and depth stop in the correct positions before the first puncture. This preliminary setup ensures that subsequent punctures through the same reference surface will automatically achieve the correct depth and angle, eliminating the need for repeated visual estimation and reducing patient discomfort
4Productivity
If the syringe is twisted for removal during fluid aspiration, then the syringe can be changed, but inadvertent needle removal and contamination of the sterile field may occur
Solution Approach 1:
The system is segmented into the syringe component and the depth guide component. The depth guide remains stationary and attached to the patient body, while only the syringe is removed and replaced. This segmentation allows syringe exchange without moving the needle or compromising the sterile field
Data Source
AI summary
A syringe guide includes: a syringe receiver including a receptacle configured to retain a syringe therein; a depth guide defining a reference surface; and a depth adjustment mechanism interconnecting the syringe receiver and the depth guide, and operable to change a distance between the receptacle and the reference surface.