Superior Court Judge Joan M. Lewis issued a temporary order preventing the San Diego Reader from publishing details about Polyheme, a blood substitute still in testing, that were obtained under the California Public Records Act. Northfield Laboratories Inc. had sued the Reader last month to stop publication of the information, which Northfield calls "trade secrets." On July 28, the Reader had published an article saying that Polyheme was being tested in downtown San Diego and in poor minority neighborhoods, on trauma patients who were unable to consent. A Northfield spokesperson said the two sides would meet next week in an attempt to reach an agreement.