C12129: A Smart Screwdriver to Prevent Inadvertent Screw StrippingNovelty:
This invention uses torque and angular rotation sensors to determine optimum screw tightening in bone.
Value Proposition:
The current method for judging screw tightening in orthopedic surgery involves manual torque feedback (i.e. the surgeon tightens the screw until it is “two-fingers tight”). This method, however, leads to screw stripping 20% of the time. The proposed device uses torque and angle sensors to implement the “turn-of-the-nut”, rotation based method of screw tightening. The device senses when the screw is seated and also alerts the surgeon when the screw is sufficiently tightened. This method provides maximum plate compression and minimizes the chance of a stripped screw. Other advantages include:
• Designed specifically for use with cortical bone screws.
• May be adapted for use with cancellous screws.
• May be useful tool in training surgeons to properly tighten screws.
• Applies method commonly used in engineering applications.
• Can be adapted for other applications using screws.
Technical Details:
Johns Hopkins researchers have developed a highly effective device to reduce the occurrence of stripped screws during orthopedic surgery. Key innovations include a torque sensor to determine when the screw is correctly seated and an angular rotation sensor to implement the “turn-of-the-nut” method of screw tightening. These two components communicate with each other to determine optimal screw insertion. Furthermore, this device also takes into account screw size and screw use as variables to determine when the screw is sufficiently tightened.
Looking for Partners:
To develop and commercialize the technology as an effective orthopedic surgery tool.
Stage of Development:
Proof of Concept
Data Availability:
Pre-publication data available.
Publications/Associated Cases:
Not available at this time.
