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Wedge pillows offer therapeutic positioning for patients who don’t have an adjustable base. By propping specific body segments at therapeutic angles, they can reduce lumbar pressure, manage acid reflux, and improve sleep positioning for specific spinal conditions. Here’s the clinical guide.
Under-Knee Wedge for Lower Back Relief
Placing a wedge under the knees while lying on the back is a classic physical therapy intervention for lower back pain. It slightly flexes the lumbar spine, reducing the extension load on posterior spinal structures (facet joints, posterior ligaments) and decreasing lumbar disc pressure. For patients with facet syndrome or spondylolysis, sleeping with knees elevated on a 6–8 inch wedge can significantly reduce overnight pain.
Incline Wedge for Acid Reflux and Cervical Support
A full-length incline wedge (typically 7–12 inches at the head) elevates the entire upper body, preventing acid reflux that disrupts sleep. For back pain patients whose sleep is secondarily disrupted by reflux, eliminating this disruption improves sleep quality and pain recovery. The incline also slightly reduces cervical pressure for patients with upper cervical conditions.
Best Under-Knee Wedge: InteVision Foam Wedge Pillow
The InteVision under-knee wedge uses memory foam over a firm base — comfortable but supportive enough to maintain the therapeutic elevation throughout the night. The 10-inch height provides enough knee flexion for meaningful lumbar pressure reduction.
Best Bed Wedge: Medslant Acid Reflux Wedge Pillow
The MedSlant is the most clinically used full-body incline wedge — a 32-inch slope at 7 degrees that provides consistent head elevation without the neck craning of stacked pillows. The gentle slope allows comfortable sleeping in multiple positions.
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