Impact to spinal cord stimulator lead integrity with direct suture loop ties

Area of Science:

• Neurosurgery
• Biomedical Engineering
• Medical Device Technology

Background:

• Spinal cord stimulator (SCS) lead migration is a common complication.
• Suturing leads directly may prevent migration but raises concerns about lead damage.
• Current practices often avoid direct lead suturing due to potential performance impairment.

Purpose of the Study:

• To evaluate the physical and electrical integrity of SCS leads after direct suturing.
• To determine the extent of damage from maximal tension applied during suturing.
• To assess the feasibility of direct lead anchoring to prevent migration.

Main Methods:

• Twenty-eight SCS leads were subjected to 56 suture knots.
• Sutures were tightened to their breaking point under controlled conditions.
• Lead integrity was assessed using high-power microscopy and impedance measurements.

Main Results:

• No significant physical damage was observed on any of the tested SCS leads.
• Electrical performance, measured by impedance, remained unimpaired post-suturing.
• Maximal tension during suturing did not cause overt lead damage or functional deficits.

Conclusions:

• Directly anchoring SCS leads with sutures appears to cause minimal damage.
• This technique may be a viable option for reducing lead migration.
• Further research is needed to confirm these preliminary findings in larger studies.