Volume Spike Investor

Hansen Medical Inc. (Nasdaq: HNSN) shares are likely to be active Tuesday after the maker of robotic catheter systems guided second-quarter revenue lower and withdrew previous system placements guidance, citing delayed purchases by customers.

Shares fell 32 percent after hours to $3.29.

The company expects second quarter revenues to be in the range of $3.1 million to 3.3 million, short of the $8.8 million expected by analysts.

The company said it will give an updated outlook for 2009 and complete second quarter financial results in its regularly scheduled 2009 second quarter press release and conference call in late July or early August. — Mike Tarsala