A locking luer fitting for connecting fluid lines. In one variation the connection interface includes a male luer connector and a corresponding female luer connector. The female luer connector includes a rotatable collar which engages the male luer connector. In another variation the female luer connector...http://www.google.co.uk/patents/US20060157984?utm_source=gb-gplus-sharePatent US20060157984 - Locking luer fitting