Merge hemo monitors, measures, and records physiologic data from a human patient undergoing a cardiac catheterization procedure.A customer reported that they were unable to equalize fractional flow reserve (ffr) during a procedure.During investigation, it was noted that there are two reasons why equalization would fail: two different channels must be chosen on the ffr setup screen, and prior to inserting wire the user must zero both channels.Customer support analyst provided the site with ffr tips for the staff in case there are questions about issue in the future after reviewing required tasks needed to equalize so than an ffr can be performed.(b)(4).
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