MalfunctionCBC

PHILIPS

Received May 6, 2002

Report MW1024981 · MDR key 393735

Device

Generic name

Water Trap

Manufacturer

Philips Medical Systems

Model number

M1657B

Catalog number

Lot number

ALL

Product problems

Signal Artifact/Noise

Patient

Narrative

Description of Event or Problem

NEW STYLE WATER TRAP USED WITH ANESTHESIA GAS ANALYZER CAUSES ARTIFACT ON THE CO2 WAVEFORM. THE ARTIFACT APPEARS AS A SMALL SPIKE DURING THE INHALATION PHASE. THE ARTIFACT OCCURS WITH HIGH AIRWAY PRESSURES, USUALLY OVER 26 TO 30 CMH20 PEAK PRESSURE. ANESTHETISTS MAY INTERPRET THIS AS AN ATTEMPT BY THE PT TO BREATHE, AND THEY MAY ADJUST THEIR DRUG DOSE BASED UPON THIS ARTIFACT.