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Contact sensitivity to polychloroparaxylene-coated cardiac pacemaker
N Iguchi1, H Kasanuki, N Matsuda
1Heart Institute of Japan, Tokyo Women's Medical College, Japan.
Pacing and Clinical Electrophysiology : PACE
|February 1, 1997
Summary
Polychloroparaxylene (parylene), used in pacemakers, can cause skin sensitivity. A polytetrafluoroethylene sheet barrier effectively prevented these allergic reactions in patients.
Area of Science:
- Biomaterials Science
- Dermatology
- Medical Device Technology
Background:
- Polychloroparaxylene (parylene) is a common biocompatible coating for cardiac pacemakers.
- Cardiac device coatings are essential for preventing device interactions with biological tissues.
Observation:
- Patients with cardiac pacemakers coated in parylene have exhibited contact sensitivity.
- Patch testing confirmed parylene as the causative agent for skin reactions.
Findings:
- Contact sensitivity to parylene was definitively established through patch testing.
- Utilizing a polytetrafluoroethylene (PTFE) sheet to wrap the pacemaker prior to implantation successfully prevented further skin reactions.
Implications:
- Parylene allergy is a significant consideration for cardiac device recipients.
- PTFE shielding offers a viable strategy to mitigate parylene-induced hypersensitivity in medical implants.
- Further research into alternative biocompatible coatings or protective strategies is warranted.