Fixation methods for implantable port chamber: comparative study using glue, self-stabilizing leg and suture...

Area of Science:

• Biomaterials Science
• Surgical Device Engineering
• Comparative Pathology

Background:

• Port chambers are crucial for drug delivery and monitoring.
• Secure and biocompatible fixation is essential for port chamber function.
• Evaluating novel fixation methods is vital for improving patient outcomes.

Purpose of the Study:

• To compare the fixation strength and tissue response of glue fixation and self-stabilizing leg fixation methods against conventional suture fixation for port chambers.
• To assess the long-term stability and biocompatibility of different port chamber fixation techniques.

Main Methods:

• Three fixation methods (glue, self-stabilizing leg, suture) were tested on 36 port chambers implanted in rabbits.
• Fixation strength, gross, and histopathologic changes were evaluated at 3 days, 1, 2, and 4 weeks post-implantation.

Main Results:

• Glue fixation demonstrated comparable strength to suture fixation (p = 0.3486) but resulted in significant granulation tissue (p = 0.0025) and superficial cracking.
• Self-stabilizing leg fixation showed lower initial strength (p = 0.0043) but improved over time with minimal granulation tissue.
• No port displacement occurred with the self-stabilizing leg method.

Conclusions:

• Glue fixation offers similar strength to sutures but presents challenges with tissue reaction and material integrity.
• The self-stabilizing leg method provides adequate fixation with superior tissue compatibility.
• The self-stabilizing leg fixation method is a promising alternative for port chamber implantation, balancing stability and biocompatibility.