interspinous process device
Also written as: IPD — interspinous process device
Motion-preserving implant placed between adjacent spinous processes to limit extension while maintaining flexion.
Full Definition
A category of spinal implants designed to treat lumbar spinal stenosis through indirect decompression and motion preservation. These devices are inserted between the spinous processes of adjacent vertebrae to limit extension while allowing normal flexion and lateral bending. By preventing excessive extension, they help maintain foraminal and central canal dimensions during activities. Common devices include the X-Stop, Coflex, and Superion systems. They represent an alternative to fusion for select patients with neurogenic claudication.
Usage
Usage note: Capitalize brand names like X-Stop, Coflex when referring to specific devices.
In Context
- "The interspinous process device provided symptomatic relief without requiring fusion." — patient outcome report
- "Contraindications for interspinous process devices include fracture of the spinous process or severe instability." — surgical planning note