>Alternatively, it blows my mind that the pulse-ox tech we’ve had in doctors’ offices since the mid 1970s is still that locked up in patents. Because we aren't

>Alternatively, it blows my mind that the pulse-ox tech we’ve had in doctors’ offices since the mid 1970s is still that locked up in patents. Because we aren't using 1970's tech anymore today. Pulse-ox tech improved a lot since then and that means more new patents. That's like saying "it blows my mind Audi's fuel stratified injection is locked up in patents because we've been driving cars since the 1910's". >In 1995, Masimo introduced Signal Extraction Technology (SET) that could measure accurately during patient motion and low perfusion by separating the arterial signal from the venous and other signals. >A noninvasive method that allows continuous measurement of the dyshemoglobins is the pulse CO-oximeter, which was built in 2005 by Masimo. >In 2007, Masimo introduced the first measurement of the pleth variability index (PVI), which multiple clinical studies have shown provides a new method for automatic, noninvasive assessment of a patient's ability to respond to fluid administration. It seems Masimo haven't just been sitting on their ass.