SAN CARLOS, Calif.--(BUSINESS WIRE)--Natus Medical Incorporated (Nasdaq:BABY) today announced that it expects to report revenue for the first quarter of 2009 of approximately $32.5 million to $33.5 million, down 9% to 12% from revenue in the same period last year and below the $37 million to $38 million guidance provided earlier. The Company’s revenue fell short of expectations primarily due to lower than expected sales of capital equipment. The Company estimates that diluted earnings per share for the quarter on a GAAP basis will be in the range of $0.01 to $0.02, falling below the Company’s previous earnings estimate of $0.06 to $0.08 per share.