Motorized Micro-Injection Device with Angle Adjustment
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Solution Overview
Problem
Current fat transplantation techniques face challenges with precise volume control, contamination risks, and operational complexity due to fixed injection angles and the need for specialized, costly syringes, leading to suboptimal surgical outcomes.
Innovation Solution
A volume-adjustable micro-injection device with a qualitative controller for precise dose control, a syringe positioning structure with a movable angle adjustment knob for directional control, and an airtight design that uses standard syringes, ensuring high accuracy, ease of operation, and reduced contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a 1-cc syringe is used for fat transplantation, then the injection volume can be controlled, but the precision of 1/10 cc or smaller (1/30 cc, 1/50 cc) is beyond human control
Solution Approach 1:
The system uses a motor to automatically push the plunger based on pre-set volume parameters, eliminating the need for manual injection control. The motorized actuation provides precise volume delivery (1/10 cc, 1/30 cc, 1/50 cc) without relying on human dexterity, while the clinician simply needs to program the desired volume and trigger the injection.
Solution Approach 2:
The manual mechanical injection process is replaced with an automated motorized system. The motor converts electrical signals into precise linear motion of the plunger, providing controlled volume delivery that cannot be achieved through manual manipulation alone. The system includes sensors and control circuits to monitor and adjust the injection process automatically.
2Measurement precision
If the DISPOS-A-JECTTM SYSTEM is used, then minimum output volume of 1/10 cc is secured, but it cannot achieve smaller volume demands of 1/30 or 1/50 cc
Solution Approach 1:
The system allows dynamic adjustment of injection volume parameters through a digital interface. Clinicians can select from multiple pre-programmed volume settings (1/10 cc, 1/30 cc, 1/50 cc) or customize specific volumes within the range. The motor control system adjusts the plunger displacement distance corresponding to each volume requirement, providing both precision and versatility.
Solution Approach 2:
The injection system transitions from fixed-volume delivery to dynamically adjustable volume control. The motorized plunger mechanism can be programmed to deliver any volume within its operational range by adjusting the actuation distance and speed. This dynamic control enables the system to adapt to different clinical requirements seamlessly.
3Ease of operation
If the plunger is removed and adapter is inserted during operation, then fat can be advanced, but the fat cells may be contaminated and have low survival rate
Solution Approach 1:
The syringe is pre-loaded with fat graft material and sealed before the surgical procedure. The motorized injection system connects to the sealed syringe and advances the plunger through the existing sealed pathway, eliminating the need to open the syringe during operation. This preliminary preparation maintains sterility throughout the entire injection process.
Solution Approach 2:
The system uses a sterile adapter or coupling mechanism that connects the motorized actuator to the syringe without breaking the sterile barrier. This intermediary component allows mechanical force to be transmitted to the plunger while maintaining the sealed environment, preventing contamination from the external environment.
4Device complexity
If the included angle between gun surface and injection needle is fixed, then the system structure is simple, but surgeons do not have flexibility in adjusting injection angle
Solution Approach 1:
The injection needle assembly is designed with a movable joint or articulation point that allows the needle angle relative to the gun surface to be adjusted dynamically during injection. This dynamic positioning capability enables surgeons to optimize the injection angle for different anatomical locations and patient positions without complicating the overall system structure.
Solution Approach 2:
The injection device is divided into modular segments: the gun body, the needle assembly, and the connection interface. The needle assembly can be independently positioned and angled relative to the gun body, allowing angle adjustment while keeping each component relatively simple. This segmentation provides flexibility without requiring complex integrated mechanisms.
Data Source
AI summary
The present invention relates to a volume-adjustable micro-injection device. The device includes a base structure having a syringe positioning structure and a grip, in which the syringe positioning structure can flexibly accommodate injection syringes with different volumes; a holding structure capable of flexibly adjusting an injection angle of syringe content for easier operation; a qualitative controller capable of accurately controlling injection volume; a pressure pushing structure to hold and push a plunger; an injection controller interlinked with the qualitative controller and the pressure pushing structure; and an eject structure facilitating simple operation and easy replacement of injection syringes. In contrast to conventional structures, the present invention provides advantages that control injection volume more accurately, address better injection angle control, allow for the syringe contents to be free from air exposure, require no special syringes, and allow for single-handed replacement of the injection syringe.