A new self-retaining vascular indwelling catheter

Area of Science:

• Biomedical Engineering
• Vascular Surgery
• Medical Device Design

Background:

• Chronic indwelling vascular catheters are essential in various medical applications.
• Challenges include infection, thrombus formation, and catheter instability.
• Existing designs may require frequent replacement or interventions.

Purpose of the Study:

• To present the design and construction specifications for a novel chronically indwelling vascular catheter.
• To evaluate the catheter's performance and reliability in chronic implantation.
• To highlight features that enhance stability and minimize complications.

Main Methods:

• Detailed design and construction of the vascular catheter.
• Surgical implantation in fetal, neonatal, and adult sheep models.
• In situ evaluation of catheter stability, infection, and thrombus formation.

Main Results:

• The catheter system demonstrated high stability in situ due to tissue-retaining lugs.
• The design effectively limited both infection and thrombus formation.
• Successful implantation and chronic use were achieved across different age groups in sheep.

Conclusions:

• The developed vascular catheter offers a reliable solution for chronic indwelling applications.
• Tissue-retaining lugs are a key feature for ensuring long-term stability.
• The system's efficacy in preventing complications makes it a promising medical device.