The couple was forced to seek out help from cops after a swarm of photographers made it impossible for them to drive to the Cedars-Sinai Medical Center to visit their critically ill newborn twins.
Quaid had repeatedly asked the assembled paparazzi to stop following his car, but his requests were ignored, reports Web site TMZ.com.
The incident happened just days after the Quaids pleaded with the press to respect their privacy while their babies Thomas Boone and Zoe Grace--born on Nov. 8--fight for their lives following an accidental drug overdose.
The twins are currently in intensive care in Cedars-Sinai after they were given 10,000-unit doses of anticoagulant Heparin by mistake, instead of the standard 10 units.
On Tuesday, the hospital's chief medical officer, Michael L. Langberg, admitted the error was "preventable" and involved "a failure to follow our standard policies and procedures."
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