Merge hemo monitors, measures, and records physiologic data from a human patient undergoing a cardiac catheterization procedure.On (b)(6) 2011, the site reported a case from the previous day that had a lock on the patient tab.The study was not checked out.Merge deleted the duplicate rows in the database table and the issue was resolved.The system is designed to allow users to lock a study or tab within the study to make changes.This ensures that two users can not make changes to the same study at the same time.However, in some instances the system will lock tabs within a study even when a second user does not have the study open on a different workstation.This "phantom" lock mimics the behavior described above except the lock is not caused by a second user but by the sql table.The lock might prevent users from calculating certain calculation that are required during the procedure since height and weight might be unavailable.(b)(4).
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