Injection Sensor Feedback Mechanism for Fat Graft Viability
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Solution Overview
Problem
Autologous fat grafting procedures are unpredictable due to variable adipose cell viability, which can result in unacceptable outcomes and require multiple revision procedures, with existing instruments being expensive and complex, making them inconvenient for wide use.
Innovation Solution
A surgical instrument equipped with a pressure sensor and feedback mechanism to measure and control shear force during tissue injection, providing real-time feedback to the operator to ensure optimal injection conditions, comprising a support body attached to the injection instrument and an electrical controller for calibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If expensive pre-assembled specialized equipment with sensors is used to measure and control pressure and shear, then measurement precision and control capability are improved, but device complexity and cost increase
Solution Approach 1:
The system is divided into separate functional modules: a pressure sensor that can be attached to the injection instrument, a support body for mounting, and a feedback mechanism. This segmentation allows the pressure measurement capability to be added to existing injection instruments without requiring complete specialized equipment, thereby improving measurement precision while reducing overall device complexity and cost.
2Reliability
If pressure sensor and feedback mechanism are added to control injection variables, then graft viability is improved, but device complexity increases
Solution Approach 1:
The system incorporates a feedback mechanism that receives pressure measurements from the sensor and provides real-time feedback to the operator through visual or tactile signals. This feedback loop enables dynamic adjustment of injection parameters during the procedure, improving graft viability by maintaining optimal pressure and shear stress levels without requiring complex automated control systems.
3Ease of operation
If modular pressure sensor attachment system is used, then ease of operation and accessibility are improved, but measurement precision may be compromised
Solution Approach 1:
The support body includes pre-configured mounting features and attachment mechanisms that ensure proper alignment and secure fixation of the pressure sensor to the injection instrument before use. This preliminary preparation ensures that the modular attachment system maintains measurement precision while preserving ease of operation, as the sensor is ready for immediate attachment without requiring complex alignment procedures during the surgical procedure.
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 instrument improves graft viability and quality by allowing precise control of injection pressure and shear stress, reducing the need for expensive equipment and enhancing surgical efficiency.
Implementation Method 1
the pressure sensor can provide a measurement indicative of a pressure exerted on a material contained within a cavity of the injection instrument during use
Implementation Method 2
a feedback mechanism configured to provide a signal to an operator indicative of the pressure exerted on a material contained within a cavity of the injection instrument during use
Implementation Method 3
The feedback mechanism can include at least one mechanism selected from a vibration system, an optical system, and an auditory system
Data Source
AI summary
The present disclosure provides devices for implanting tissue or other substances within the body. The devices can include a feedback mechanism, which can assist a surgeon in implanting the tissue or other substances by preventing excess shear force or pressure on the tissue or substance to be implanted.