Metal Hypersensitivity after Nuss Procedure: What and When to do?

Area of Science:

• Cardiothoracic Surgery
• Allergy and Immunology
• Medical Device Materials

Background:

• Metal hypersensitivity is a recognized complication following the Nuss procedure for pectus excavatum.
• Currently, no established treatment guidelines exist for managing this specific complication.

Purpose of the Study:

• To retrospectively analyze the incidence of postoperative metal allergy after the Nuss procedure.
• To evaluate the efficacy of medical treatment protocols in managing this allergy.
• To determine if bar removal is necessary for successful treatment.

Main Methods:

• Retrospective review of patients who underwent the Nuss procedure between 2013 and 2023.
• Exclusion of patients with pre-existing allergies, positive infection markers, or those undergoing re-do procedures.
• Analysis of allergy incidence and treatment outcomes.

Main Results:

• Nine out of 307 patients (2.9%) developed postoperative metal allergy.
• No significant difference in allergy incidence was observed between single and double bar placements.
• All patients were successfully treated with a medical protocol, avoiding premature bar removal.

Conclusions:

• Medical treatment protocols are effective for managing postoperative metal allergy after the Nuss procedure.
• Accurate diagnosis, excluding surgical or infectious etiologies, is crucial for successful management.
• Premature removal of the Nuss bar is not typically required for allergy resolution.