Intuitive Surgical

(ISRG) - Get Report

, a maker of robotic surgical gear, was surging Friday after the company reported a fourth-quarter profit that fell 52% from a year ago but came in better than analysts anticipated. The stock was higher by $18.08, or 18.2%, to $117.40.

Millipore

(MIL)

, a biopharmaceutical products manufacturer, jumped nearly 7% after the company reported strong fourth-quarter earnings and guidance for 2007. Millipore was adding $4.82 at $74.34.

Shares of

Vertex Pharmaceuticals

(VRTX) - Get Report

were slumping a day after the company said it expects losses to widen in 2007 as it invests more in its hepatitis C drug. Vertex was losing 96 cents, or 2.8%, to $33.84.

Among health care stocks gaining ground,

Hanger Orthopedic Group

(HGR)

was higher by 81 cents, or 8.8%, to $9.97.

CryoLife

(CRY) - Get Report

was rising by 39 cents, or 4.6%, to $8.84.

Elan

(ELN)

added 38 cents, or 2.9%, to $13.55.

Decliners included

Angiotech Pharmaceuticals

( ANPI), which dropped $1.26, or 14.2%, to $7.59.

Atherogenics

( AGIX) slipped 79 cents, or 6.6%, to $11.22.

Tenet Healthcare

(THC) - Get Report

eased 10 cents, or 1.4%, to $7.06.