Is anyone using Massimo's new acoustic technology to monitor patients using PCA pumps?
Are there advantages over capnometry?

This limited study conducted by Massimo states that both accustic technology and capnography showed similar results for patient RR.

http://www.masimo.com/pdf/rra/rra_whitepaper.pdf

Seems to me that the dual functionality of a traditional capnographer to measure RR and ETCO2 would win out.