A miniaturized brush particularly adapted for medical use formed at the distal end of an elongated brush drive shaft having a hollow lumen formed therein for introduction over a guidewire. The brush drive shaft is enclosed in the lumen of a brush delivery catheter and other components of a brush sub-assembly...http://www.google.co.uk/patents/US6030397?utm_source=gb-gplus-sharePatent US6030397 - Miniaturized medical brush
