Ohmeda Biox 3740 Pulse Oximeter

The Ohmeda Biox 3740 Pulse Oximeter differs from the Ohmeda 3760 by delivering a graphic wave form directly on the display which indicates the current, real-time Oxygen Saturation % (SaO2) and pulse rate readings. This wave form shows the quality and strength of patient signals, and can be changed to have either the graphic information or numeric information dominant. The 3760, on the other hand, delivers trend data at preset intervals. Although the 3740 has no printer function, it will store up to eight hours of data, which can be downloaded to a computer through a serial port for analysis.

The unit’s front panel includes an menu key which allows the clinician to set the low SaO2 threshold (default is 90%); the high SaO2 (default is OFF); volume levels and response time; time and date; and a calibration and diagnostic mode. The unit uses the same probes and AC adapter as the 3760.

The unit can operate on its internal rechargeable battery for approximately 3.5 hours. It can be recharged to 80% capacity in 4 hours and 100% capacity in 6.5 hours.

Accessories:

Fingerclip Sensor w/13’ cord AC Charger, model 15

#6051-000-035 #4610-031

Suggested Substitutions: Nellcor N-180, N-200, NPB-290, Ohmeda 3760P, Invivo 4500+, Healthdyne 950, Healthdyne 930

Pulse Oximeters

Pulse Oximeters are monitors that provide real-time measurement of a patient’s pulse rate and arterial oxygen saturation (the oxygen-carrying capacity of the blood’s hemoglobin, expressed as a percentage; normal is in the high 90’s). A disposable or reusable probe is placed on the patient’s finger (optional probes can be used on ear or tongue for some units.) The probe emits an infrared light from one side of the finger and captures the residual light that passes through the finger on the other side. The probe transmits this data to the monitor, which calculates the oxygen saturation of the blood. Used for patients with respiratory problems, and is required by law whenever a patient is under anesthesia. Note that these pulse oximeters measure Functional oxygen saturation, which is oxygenated hemoglobin expressed as a percentage of the hemoglobin that is capable of transporting oxygen. In contrast, some other laboratory instruments, such as blood gas analyzers or CO-oximeters, report Fractional oxygen saturation, which also measures dysfunctional hemoglobin. It is therefore not likely that the readings from these devices and the ones on a pulse oximeter will agree.