Can Spinal Cord Stimulators Cause Paralysis?

Spinal cord stimulation devices can cause spinal cord injury and paralysis, although serious neurological injuries are uncommon compared with hardware-related complications.

During implantation, electrodes are positioned in the epidural space near the spinal cord, where direct trauma from a needle or lead can injure nervous tissue.

Paralysis can also result when bleeding produces an epidural hematoma or when an infection at the surgical site spreads deeper and causes spinal cord compression, mechanisms recognized in reviews of spinal cord stimulator complications.

Lead migration is a more common device complication, but it typically causes loss or alteration of stimulation rather than paralysis and may require reprogramming or repositioning when the electrodes move from their intended location.

In recent years, a large study of 71,172 spinal cord stimulator implants found spinal cord injury within 45 days in 0.42% of patients.

Depending on the location and severity of the injury, symptoms can include weakness, numbness, difficulty walking, loss of bladder or bowel control, or partial or complete paralysis.

New neurological symptoms after implantation require prompt medical evaluation because identifying and treating spinal cord compression early can affect the extent of resulting injury.

How Can a Spinal Cord Stimulator Cause Paralysis?

Paralysis can occur if the spinal cord is directly injured during implantation or later compressed by a complication that develops around the implanted system.

The most serious mechanisms involve bleeding, infection, scar tissue, or direct trauma during needle or lead placement.

These problems can interrupt the nerve pathways that control movement, sensation, and bladder or bowel function.

The timing of symptoms can help distinguish an injury that occurred during implantation from one that developed gradually afterward.

Potential causes of spinal cord injury and paralysis include:

• Direct injury during lead placement: A needle, introducer, or lead can injure the spinal cord or nearby nerve tissue during implantation.
• Epidural hematoma: Bleeding in the epidural space can create pressure around the spinal cord and cause weakness, sensory loss, or paralysis if compression becomes severe.
• Spinal stenosis or limited canal space: Preexisting narrowing can leave less room around the spinal cord and may increase the risk of compression after implantation.
• Infection or epidural abscess: A deep infection can spread into the epidural space and create swelling or an abscess that compresses the spinal cord.
• Scar tissue around the lead: Reactive tissue can develop around an implanted lead and, in rare cases, cause delayed spinal cord compression weeks, months, or years later.

Spinal Stenosis and Spinal Cord Compression

Spinal stenosis narrows the spinal canal and reduces the amount of space available around the spinal cord and nearby nerves.

In a patient receiving a spinal cord stimulator, that limited space may become important because leads and surrounding tissue are placed within or adjacent to the epidural space.

A large 2022 study published in Regional Anesthesia & Pain Medicine found that preexisting cervical and thoracic spinal canal stenosis were associated with higher odds of spinal cord injury after spinal cord stimulator implantation.

Thoracic stenosis showed the stronger association, with approximately four times the odds of spinal cord injury in the study population.

Spinal cord compression can cause symptoms such as weakness, numbness, difficulty walking, loss of coordination, or changes in bladder and bowel function, depending on the location and severity of the pressure.

Preoperative imaging and evaluation of the available spinal canal space can therefore be important when planning spinal cord stimulator placement, particularly in patients with known stenosis.

Epidural Hematoma

An epidural hematoma can develop when bleeding causes blood to collect in the space around the spinal cord after spinal cord stimulator implantation.

As the hematoma expands, it can compress the spinal cord and cause severe back pain, numbness, muscle weakness, loss of bladder or bowel control, or paralysis.

A study of 8,326 spinal cord stimulator procedures identified spinal hematoma within 30 days in 0.71% of patients.

In the same study, patients who had taken any anticoagulant within 30 days before implantation had 2.428 times higher odds of spinal cord injury, while warfarin use was associated with 2.944 times higher odds.

Bleeding disorders and anticoagulant use are recognized factors that can increase the risk of bleeding around the spinal cord, making medication and medical-history review important before procedures involving the epidural space.

Because spinal cord compression from a hematoma can cause permanent neurological damage, new weakness, sensory loss, or other neurological symptoms after implantation require prompt medical evaluation and treatment.

Spinal Cord Injury During Lead Placement

Spinal cord injury can occur during stimulator implantation if the needle, introducer, or lead directly damages the spinal cord or nearby neural tissue.

A 2026 emergency protocol published in Interventional Pain Medicine identifies direct needle trauma, hematoma formation, vascular injury, and other procedural events as possible causes of spinal cord injury during interventional spine procedures.

The severity of the resulting injury can range from temporary sensory changes or weakness to permanent neurological deficits, including paralysis.

Lead migration is a separate and much more common complication that typically reduces pain relief or changes stimulation rather than directly causing spinal cord injury; a 2026 study describes lead migration as a common cause of loss of efficacy after spinal cord stimulation.

Imaging, neurological examination findings, and the operative record may help determine whether an injury occurred during placement or developed later from another complication.

New weakness, sensory loss, or loss of motor function after implantation requires prompt medical evaluation because early recognition of spinal cord injury can affect treatment and neurological outcome.

Spinal cord injury after stimulator implantation is uncommon, but new neurological symptoms can indicate compression, bleeding, infection, or direct injury to the spinal cord.

A 2026 review of adverse events after spinal cord stimulator placement identifies new or worsening weakness, sensory loss, and bowel or bladder dysfunction among the symptoms reported with serious neurological complications.

Severe or rapidly worsening back pain can also accompany problems such as an epidural hematoma that places pressure on the spinal cord.

Published estimates vary, although some studies have reported spinal cord injury or postoperative neurological deficits in fewer than 1% of implanted patients.

Prompt evaluation is important because the underlying process may require urgent treatment to limit further neurological damage.

Warning signs that warrant medical evaluation include:

• New or progressive muscle weakness: Difficulty moving a leg, standing, or walking can indicate impaired spinal cord function.
• Severe or rapidly worsening back pain: Sudden severe pain after implantation may accompany bleeding or another complication involving the spinal canal.
• New numbness or loss of sensation: Changes in sensation below or around the implantation level can occur when the spinal cord or nearby nerves are affected.
• Difficulty walking or loss of coordination: Changes in gait or balance may reflect a developing neurological deficit.
• Loss of bladder or bowel control: New urinary retention, incontinence, or bowel dysfunction can indicate serious spinal cord compression.
• Partial or complete loss of movement: Sudden paralysis or substantial loss of motor function requires emergency medical assessment.

Yes, paralysis can develop weeks, months, or even years after spinal cord stimulator implantation when a delayed complication causes spinal cord compression or neurological injury.

Boston Scientific product labeling warns that reactive tissue can form around an epidural lead and, in some cases, produce delayed spinal cord compression with neurological deficits, including paralysis, with onset ranging from weeks to years after implantation.

Infection can also spread beyond the surgical site and cause an epidural abscess or other deep complication that places pressure on the spinal cord.

ASRA Pain Medicine likewise identifies delayed neurological injury from epidural hematoma and infection as recognized complications of spinal cord stimulation.

Lead migration is more commonly associated with changes in stimulation or reduced pain relief and should not be treated as a primary cause of delayed paralysis without evidence of actual spinal cord or nerve compression.

New weakness, numbness, difficulty walking, or bladder or bowel changes developing after implantation require medical evaluation because delayed neurological symptoms may reflect a serious complication rather than routine device behavior.

Spinal cord stimulator lawsuits generally involve claims that an implanted device was defective, manufactured improperly, or accompanied by inadequate warnings about serious risks.

Other cases may involve medical malpractice allegations against a surgeon, hospital, or other healthcare provider when the claimed injury is tied to implantation, monitoring, or treatment rather than the device itself.

Current federal product liability litigation is organized by manufacturer rather than through one industrywide proceeding.

Lawsuits involving Boston Scientific are centralized in MDL No. 3181 in the Central District of California, while Abbott Laboratories cases are proceeding in MDL No. 3194 in the Northern District of Illinois and Nevro cases are centralized in MDL No. 3195 in the Northern District of California.

The U.S. Judicial Panel on Multidistrict Litigation created the Abbott and Nevro proceedings in October 2026 after previously declining to combine spinal cord stimulator claims against multiple manufacturers into one MDL.

Abbott acquired St. Jude Medical in 2017, so lawsuits involving certain St. Jude Medical spinal cord stimulation systems may now involve Abbott or related entities depending on the device and circumstances.

Medtronic spinal cord stimulator lawsuits remain outside the Boston Scientific, Abbott, and Nevro MDLs and continue on separate litigation tracks.

The existence of an MDL does not establish that a spinal cord stimulator caused a patient’s paralysis or that a manufacturer is liable.

A paralysis claim still depends on the specific device, the cause of the spinal cord injury, the medical and surgical records, and whether the evidence supports a product liability claim, medical malpractice claim, or another legal theory.

Paralysis after spinal cord stimulator implantation can affect mobility, independence, employment, and other parts of daily life.

When a serious neurological injury may be connected to the implanted device, the procedure itself, or later medical care, determining the cause is an important part of evaluating a potential claim.

Our lawyers review spinal cord stimulator paralysis claims involving patients across the country.

Depending on the circumstances, a claim may involve a device manufacturer, a healthcare provider, or another party assigned responsibility for the injury under applicable law.

If you or a loved one experienced paralysis, permanent weakness, loss of sensation, or another serious neurological injury after spinal cord stimulator implantation, contact TorHoerman Law for a free consultation with an attorney.

Our law firm provides legal assistance on qualifying claims on a contingency fee basis, meaning there are no attorney fees unless compensation is recovered.

You can also use the chat feature on this page for a free case review and to learn whether you may qualify to file a spinal cord stimulator lawsuit.