PEDICLE SCREW POSITIONING GUIDE
A guide to ensure adequate screw trajectory into the pedicle for a quick and safe spine surgery
THE PEDICLE SCREW CHALLENGE
- Pedicle screws are a particular type of bone screw designed for implantation into a vertebral pedicle in the context of spine surgery.
- They are widely used for fracture stabilisation, scoliosis correction, degenerative changes stabilisation and spine stabilisation after decompression.
- The lack of adequate guidance for surgeons can in some situations cause screw misplacement, that could be very detrimental to the patient.
- The most commonly used technique for pedicle screw placement is a free-hand technique in which the surgeons uses their knowledge of the anatomy, visual references, and feel to position and install a guide wire which is subsequently used to ensure that screws are correctly placed within vertebral pedicles.
- Alternative techniques include image guidance systems (fluoroscopy or conventional x-ray) or computer-assisted surgery systems which are complex, costly and increase operative time.
A MECHANICAL GUIDE WIRE FOR MORE ACCURACY
- A novel class-I medical device to ensure adequate screw trajectory into the pedicle was developed at McGill University.
- This positioning device improves the free hand technique by reducing X-rays and getting more precise movement modifications to the trajectory of the screw.
- Demonstration prototype (Fig. 1) validated on cadaveric specimens
- Technology readiness level (TRL) 6
Figure 1. Prototype of the pedicle screw positioning guide
QUICK AND SAFE SCREW PLACEMENT
- Simplifying screw placement
- Reducing risk of pedicle screw malposition
- Making screw placement safer
- Allowing perfect trajectory fine tuning intra-operatively
- Reducing operative time
- Reducing X-ray exposure for patient and surgeon
- Pending PCT application WO2019/218069 A1
- Partnering/licensing opportunity
If you are interested by this technology, please contact :
Lucile Zenou, Project Manager, firstname.lastname@example.org, (514) 840-1226, Ext. 2267
Dr. Ahmed Aoude, Orthopedic surgeon
Dr. Ahmed Aoude is an assistant professor in orthopedic surgery at McGill University. He completed fellowships in orthopedic oncology at Mount Sinai Hospital in Toronto and spine surgery at Foot Hills Medical Center in Calgary. His practice includes complex oncology resections and spine reconstructive surgery. Prior to medicine Dr. Aoude obtained degrees in biomedical engineering and electrical engineering at McGill University. He also was a project manager designing and developing computer assisted surgery equipment and techniques for orthopedic surgery prior to medicine. To date, he has multiple orthopedic surgery patents and many peer reviewed publications in orthopedics. His research interests include clinical outcomes, surgical techniques and medical device development and design.