(b)(4).The fsr installed a second o2 sensor and the unit calibrated.The unit operated to manufacturer specifications and was returned to clinical use.The suspect part was returned to the manufacturer for further evaluation.During the laboratory evaluation, the product surveillance technician (pst) installed the returned o2 sensor into a lab-use only (luo) epgs and connected the epgs to a system-1 simulator and central control monitor (ccm).He connected the epgs to o2 and air, entered a perfusion screen on the ccm.After the 15 minute warm-up period, calibration of the o2 sensor was initiated and passed.The measurement of the direct current (d/c) output voltage from the o2 sensor at (b)(4) liters per minute (l/min) and (b)(4) o2 was (b)(4) volts (v) which is within the specification of (b)(4) volts.The pst initiated calibration ten times with returned o2 sensor installed, passed all ten times.If additional information becomes available on this complaint that would alter the facts and/or conclusion, a supplemental report will be filed accordingly.
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