RT interviews Dan Roth, director of oximetry marketing, and Earl Rozran, director of perinatal marketing, both from Nellcor Puritan Bennett.
For 19 years, Nellcor, Pleasanton, Calif, has manufactured various versions and generations of pulse oximeters. RT spoke with Dan Roth, director of oximetry marketing, and Earl Rozran, director of perinatal marketing, about Nellcors newest developments in pulse oximetry, the OxiMax Pulse Oximetry System, which received 510(k) approval on March 8, and the OxiFirst Fetal Pulse Oximeter.
Q. What is unique about the OxiMax Pulse Oximetry System?
OxiMax is a platform consisting of our pulse oximeter, the N-595, an OxiMax OEM board, and an array of different sensors. To build on the OxiMax platform, we launched a specialty sensor, MAX-FAST (adhesive forehead sensor). When patients have poor pulse perfusion, arterial blood traveling from the heart reaches the head much sooner than the hands. MAX-FAST displays changes in oxygen saturation typically 1 to 2 minutes earlier than digit sensors during these conditions. All other head sensors on the market today operate with an accuracy of ±3%. MAX-FAST operates with an accuracy of ±2%.
Q. What does it mean to receive the 2002 Medical Design Excellence Award (sponsored by Canon Communications) for its OxiFirst Fetal Pulse Oximeter and Fetal Sensor?
Q. How is this oximeter specialized for infants?
In terms of differentiation from traditional pulse oximetry, the OxiFirst system utilizes a variation on the standard sensor types. There are two types of pulse oximetry sensors: transmission and reflectance. Both rely on the same operating principles but differ in the positioning of the optical components relative to the vascular bed. In transmission pulse oximetry, the light-emitting diodes (LEDs) and photodetector are positioned on opposite sides of a vascular bed, and light absorption across that bed is determined. This is what is typically seen with disposable sensors of this design positioned on the end of a finger.
In reflectance pulse oximetry, the LEDs and photodetector are positioned adjacent to one another on the same skin surface, and absorption is determined from light that scatters back to the tissue surface. Since the intrapartum fetus does not offer easy access to fingers to enable a clinician to place a transmission-style pulse oximetry sensor, we utilize a reflectance sensor for the OxiFirst system. The sensor rests against the fetal cheek to provide a quantitative FSpO2 value. This is a direct, objective, and real-time measurement of the percent of oxygen saturation in fetal arterial blood.