===== Titanium Interspinous Process Device ===== A '''titanium interspinous process device (IPD)''' is a minimally invasive spinal implant placed between the spinous processes of lumbar vertebrae. It is typically used to treat lumbar spinal stenosis, particularly in patients whose symptoms improve with spinal flexion. ==== Definition ==== A titanium interspinous process device is an implant made of titanium alloy, designed to act as a spacer between spinous processes, limiting spinal extension and decompressing neural elements. ==== Mechanism of Action ==== * Limits lumbar extension. * Maintains or increases the interspinous distance. * Enlarges the neural foramina and central canal. * Reduces load on the facet joints and posterior annulus. ==== Indications ==== * Lumbar spinal stenosis with neurogenic intermittent claudication. * Symptom relief in flexion. * Mild to moderate cases without significant instability. ==== Contraindications ==== * Severe spinal instability or spondylolisthesis > Grade I. * Osteoporosis or poor bone quality. * Active local or systemic infection. * Known allergy to titanium (rare). ==== Common Devices ==== * [[Coflex]]® (Paradigm Spine) * [[Superion]]® (Vertiflex) * [[DIAM]]™ (Medtronic) * (Note: [[X-STOP]]® was withdrawn from the market) ==== Advantages ==== * Minimally invasive approach. * Preserves segmental motion. * Shorter recovery times. * Possible use under local anesthesia. ==== Complications ==== * Fracture of the spinous process. * Device migration or loosening. * Infection. * Persistent or recurrent symptoms.