Provided below is the risk information for patients in the United States.


The iFuse Implant System® is intended for sacroiliac fusion for conditions including sacroiliac joint dysfunction that is a direct result of sacroiliac joint disruption and degenerative sacroiliitis. This includes conditions whose symptoms began during pregnancy or in the peripartum period and have persisted postpartum for more than 6 months.


  1. Deformities or anatomic variations that prevent or interfere with iFuse placement.
  2. Tumor of sacral or ilial bone.
  3. Active infection at treatment site.
  4. Unstable fracture of sacrum and or ilium involving the sacroiliac joint.
  5. Allergy to metal components.


  1. Women of childbearing potential should be cautioned that vaginal delivery of a fetus may not be advisable following SI joint fusion. If pregnancy occurs, the woman should review delivery options with her obstetrician.


  1. Patient adherence to post-operative physical activity instructions is important to support long-term service life of the implant.


As with other surgical procedures used to treat SI joint conditions, the risks associated with the iFuse surgical procedure include, but are not limited to the following:

  1. Adverse reactions to anesthesia
  2. Hemorrhage (internal bleeding)
  3. Muscle damage
  4. Hematoma (blood pooled under the skin) or seroma (clear fluid under the skin) at the implant site
  5. Neurological deficit, nerve root or peripheral nerve injury, irritation or damage (damage to nerves, permanent or temporary)
  6. Vascular injury (damage to a blood vessel) or damage resulting in catastrophic or fatal bleeding
  7. Neurovascular (blood vessel and nerve) injury
  8. Damage to lymphatic vessels and or lymphatic fluid exudation (leakage)
  9. Injury to intra-pelvic structures
  10. Infection of the wound, deep infection, peritonitis (infection in the abdomen)
  11. Wound dehiscence (the surgery incision opens up)
  12. Pulmonary or systemic embolism (clot in lungs or blood vessel system)
  13. Thrombosis, thrombophlebitis (blood clot and swelling of blood vessels)
  14. Death
  15. Bruising
  16. Local swelling
  17. Radiation exposure

Potential risks specifically associated with the iFuse Implants or Delivery System include, but are not limited to the following:

  1. Infection
  2. Pain, discomfort, or abnormal sensations due to presence of the implant
  3. Instrument failure resulting in a complication
  4. Migration (moving), loosening or fracture of the implant
  5. Pain in muscle due to altered biomechanics (the positioning of your hip, leg and foot during normal daily activities)
  6. Nerve root or peripheral nerve root irritation due to local swelling or altered biomechanics (changes in position of your hip, leg and foot during normal daily activities)
  7. Loss of fixation / stabilization (implant becomes loose from the bones)
  8. Metal sensitivity, or allergic reaction
  9. Failure of device to improve symptoms and/or function
  10. Increased pain at treated or adjacent levels (lumbar spine above and hips below)
  11. Need for re-operation or removal of the implant(s)
  12. Implant rejection
  13. Response to wear debris (small metal particles that come loose from the device causing a tissue response)
  14. Decrease in bone density due to stress shielding (loss of bone mass due to the implant assuming some of the normal daily load of the SI joint)
  15. Failure of device to fuse your SI joint
  16. Potential difficulty in delivering fetus vaginally due to device-related restriction of SI joint stretching
More Resources in the Sacroiliac Joint Disorders Center