A retrospective matched pair analysis study on single level unilateral L4/5 hemi-laminectomy with and without the use of the Aperius percutaneously-inserted inter-spinous spacer in patients with bilateral lateral recess stenosis with symptomatic unilateral symptoms. A possible alternative to bilateral laminectomy. At 6 months, Aperius patients had better radiographic outcomes(intervertebral angle and intervertebral foraminal height) and bodily pain scores. We conclude that unilateral percutaneous decompression hemilaminectomy with interspinous spacer augmentation is safe and effective. Это и многое другое вы найдете в книге The Use of Percutaneous Aperius Inter-spinous Spacer in Laminectomy (Benjamin Tow,Justin Boey and Wai-Mun Yue)