What is an intrathecal baclofen pump?

Intrathecal baclofen pump: what it is and when to use it

Intrathecal baclofen (ITB) pump is an implanted, programmable device that delivers baclofen directly into the cerebrospinal fluid to reduce severe, disabling spasticity when oral therapy and less‑invasive options fail, improving comfort, hygiene, and function, and thereby quality of life. 1

What it is

• Implantable pump (in the abdominal wall) connected to a catheter placed in the intrathecal space; continuously infuses low doses of baclofen near the spinal cord for potent antispastic effect with fewer systemic side effects than oral dosing. 2
• Programmable dosing allows titration and diurnal patterns; requires periodic sterile refills to avoid life‑threatening withdrawal. 2, 3

Who should get it (decision focused on morbidity, mortality, QOL)

• Indicated for chronic, clinically significant spasticity causing pain, contracture risk, skin/hygiene problems, or loss of function after stroke or other central motor lesions, after stepwise failure/intolerance of:
  1. Positioning, stretching, ROM, splinting/serial casting
  2. Oral agents (baclofen, tizanidine, dantrolene)
  3. Focal chemodenervation (botulinum toxin, phenol/alcohol) ITB is recommended/considered at this stage to reduce spasticity and related disability. 1

What outcomes to expect

• Consistent reduction in tone and spasms with improved ease of care, sleep, and selected functional measures; strongest data are for tone reduction and caregiver/QOL benefits. 1
• Small trial evidence in chronic stroke supports spasticity reduction; long‑term series in spinal etiologies show marked Ashworth and spasm score improvements. 1, 4, 5
• Mortality impact is indirect (reduced complications like skin breakdown, falls, infections via better hygiene/mobility).

Key risks and how to avoid harm

• Withdrawal (emergency): abrupt interruption (empty pump, catheter failure) can cause fever, severe rebound spasticity/rigidity, delirium, rhabdomyolysis, multiorgan failure, death—prevent with on‑time refills, prompt troubleshooting; manage by rapidly restoring intrathecal delivery and supportive care. 6, 3
• Device complications: catheter occlusion/break/dislodgement, CSF leak, infection/meningitis; require surgical/pain team follow‑up pathways. 4, 5
• MRI: some pumps are MR‑conditional; coordinate with device team before/after scans to prevent dosing errors or thermal injury. 7
• Pregnancy: limited data suggest low teratogenic risk; doses may need increases; plan specialist oversight. 8

Practical algorithm

1. Confirm severe spasticity limiting function/hygiene or causing pain despite optimized conservative, oral, and focal therapies. 1
2. Screen test: intrathecal baclofen bolus to document meaningful tone reduction. 2
3. Implant programmable pump if responsive and goals are care burden reduction and function/QOL gains. 2
4. Program/titrate dose; schedule reliable refills; educate patient/caregivers on withdrawal red flags and urgent access. 3
5. Manage imaging and procedures with device team; reassess benefits vs complications over time. 7, 3

Why this recommendation

• The most relevant and directive guidance (Stroke rehabilitation guideline) advises considering ITB for chronic post‑stroke spasticity with pain, hygiene issues, or decreased function after less‑invasive steps—targeting QOL and morbidity directly. 1