ENHANCED STABILIZING SYSTEM AND SURGICAL TOOL TO SECURE AN ELECTRODE ARRAY TO THE SPINAL CORE

摘要

Described in this disclosure is a support structure for an electrode array configured for implanting against the spinal cord for treatment of pain. The restoring force of the support structure works in concert with frictional coupling between the array and the spinal cord to overcome the inertial force associated with ateral motion of the array. The electrode array is supported with struts that run longitudinally across or near the array backing. For example, two struts can be affixed on either out-board longitudinal edge of the array. The electrode array can be further stabilized by securing to a vertebra in the patient using a strap equipped with a collar that encircles the bundle of electrical leads emerging from the array through the dura. Positional stability of the array is better than 0.5 nm per movement cycle, thereby inhibiting the array from lifting off of the spinal cord during movement of the spinal cord within the dura.

主权项

1. An implantable device for stimulating the spinal cord of a subject, comprising:
(a) an array of electrodes arranged on a compliant backing that is configured to conform to the spinal cord; (b) a deformable support structure configured to be secured to an anatomical structure inside or outside the dura and to urge the array towards the spinal cord; and (c) one or more electrical leads configured to pass from electrodes on the array through or against the support structure and out through the dura; wherein the support structure comprises one or more struts or rigid members positioned horizontally over or along the backing of the electrode array and configured to maintain disposition of the array on the spinal cord during movement of the spinal cord within the dura, thereby inhibiting the array from lifting off the spinal cord.