A novel low-profile self-expanding epidural lead array system that is fully collapsible, deployable, and retrievable

Area of Science:

• Biomedical Engineering
• Medical Devices
• Pain Management Technology

Background:

• Spinal Cord Stimulator (SCS) devices, used since the 1970s, manage chronic pain.
• Current SCS leads (cylindrical and paddle) have limitations: cylindrical leads migrate, paddle leads require large incisions.
• Existing devices face challenges with displacement and suboptimal pain relief.

Purpose of the Study:

• To develop a novel Spinal Cord Stimulator (SCS) device.
• To overcome limitations of current SCS technology, such as lead migration and invasiveness.
• To create a low-profile, deployable, and retrievable SCS system tailored to epidural anatomy.

Main Methods:

• Designed and fabricated a prototype SCS device with a nitinol mesh frame and ePTFE membrane.
• Integrated platinum-iridium electrodes with an external battery pack.
• Conducted in vitro mechanical and electrochemical tests to evaluate performance and material suitability.

Main Results:

• The nitinol mesh frame allows the device to self-expand and conform to the epidural space.
• The device collapses to a diameter smaller than a 14-gauge needle for minimally invasive delivery.
• Mechanical and electrochemical tests confirmed device functionality and material appropriateness.

Conclusions:

• The novel SCS design effectively prevents dislocation and migration, ensuring better wall apposition.
• The larger surface area enhances pain management capabilities.
• This next-generation SCS platform shows significant potential for improved chronic pain treatment.