Robotic Fat Graft Injection Device with Navigation System
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Solution Overview
Problem
Current fat graft injection techniques rely on manual injection, leading to inconsistent dosages, uneven distribution, and potential necrosis due to variable pressure, resulting in low fat graft survival and increased risk of surgical failure.
Innovation Solution
An automatic fat graft injection device featuring a pump unit, storage unit, and navigation system, which includes a microprocessor and robotic arm for precise control of fat dosage and pressure, ensuring consistent injection into the adipose layer with minimal manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual injection is used, then the surgeon can control the injection process, but the dosage and pressure are inconsistent leading to low fat graft survival
Solution Approach 1:
The patent replaces the manual mechanical injection system with an automated pump unit that uses a drive shaft, drive wheel, and gear mechanism to control plunger movement. This substitution eliminates human variability in dosage and pressure control, ensuring consistent fat graft injection parameters that improve survival rates while reducing the surgical complexity.
2Manufacturing precision
If manual injection is used, then the surgeon can adapt to different areas, but positioning errors occur leading to uneven distribution and necrosis
Solution Approach 1:
The patent employs a navigation system that creates a three-dimensional model of the target area and uses this digital copy to guide the injection process. The navigation system displays real-time probe position and injection parameters, allowing precise positioning without increasing mechanical device complexity. This digital mapping approach ensures accurate fat graft placement while maintaining device simplicity.
3Object-affected harmful factors
If manual injection is used, then the process is simple, but excessive pressure causes fat graft necrosis and inflammation
Solution Approach 1:
The patent incorporates a feedback mechanism where the pump unit's microprocessor continuously monitors injection pressure and dosage through sensors. The system compares real-time data against predetermined safe parameters and automatically adjusts the plunger movement speed and force. This closed-loop feedback control prevents excessive pressure that could cause necrosis or inflammation, while the automation level remains manageable through intuitive control interfaces.
4Manufacturing precision
If manual injection is used, then the equipment is simple, but dosage inconsistency leads to overlapping filling and skin unevenness
Solution Approach 1:
The patent uses a dynamic injection system where the pump unit can adjust plunger movement speed and injection rate in real-time based on the specific anatomical area and fat graft requirements. The drive shaft connects to a controllable plunger that varies its推进 speed throughout the injection process, ensuring consistent dosage delivery. This dynamic control capability achieves precise dosage consistency without requiring overly complex mechanical structures, as the adjustments are made through automated control rather than manual manipulation.
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 device achieves uniform fat graft distribution, increased survival rates, and reduced physical and mental fatigue for surgeons by ensuring consistent dosages and pressures, thereby minimizing complications such as necrosis and inflammation.
Implementation Method 1
a pump unit (3) connected to the storage unit (2) between the injection unit (1) and the pump unit (3)
Data Source
AI summary
The present invention relates to a fat graft injection device, which comprises: an injection unit having a connection end and a terminal; The injection unit is operated by robotic arm system in controlled speed, multiple layers, multiple lines, a storage unit connected to the injection unit; and a pump unit connected to the storage unit, wherein the storage unit is between the injection unit and contains fat grafts. Fat grafts in the storage unit are injected into the subcutaneous layer through the injection unit by the pump unit with the guiding of navigation system, thus completing the fat graft injection, with accurate and effective, manner without exhausted back and forth surgeon's arm movement.