Reduced frictional resistance of polyurethane catheter by means of a surface coating procedure

✍ Scribed by N. Nurdin; E. Weilandt; M. Textor; M. Taborelli; N. D. Spencer; P. Descouts

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 938 KB
• Volume: 61
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19960912)61:11<1939::aid-app8>3.0.co;2-k

✦ Synopsis

Polyurethane and poly(viny1 pyrrolidone) (PVP)-coated polyurethane catheter surfaces were characterized by time of flight secondary ion mass spectrometry (TOF-SIMS) and were compared in terms of wettability and adhesion and friction properties by scanning force microscopy (SFM). Using TOF-SIMS, the presence of hard segments in the first layers of the polyurethane catheter were shown, and the presence of a P V P coating on the modified catheters was clearly identified. T h e P V P coating induced a hydrophilic surface after immersion of the catheters in water for several hours. When SFM experiments were carried out in water, the adhesive force developed between the PVP-coated surface and the tip became immeasurably small. Tribometric measurements along a 500-nm scan line quantified friction coeficients of 0.05 for the coated catheter and 0.50 for the native polyurethane catheter. T h e P V P coating on catheters provided smooth, soft, and nonadhesive surface properties, which would minimize difficulties during their insertion into the vessels of the patient. (c 1996 .John Wiley & Sons, Inc.