CapnocheckÂ® II Hand-Held. Capnograph/Oximeter. PATIENT MONITORING. The BCI Â® Capnocheck II. Hand-Held Capnograph/Oximeter. is a full-featured, highly portable. unit available in your choice. of configurations, delivering. capnography only or capnography. combined with oximetry. Ideally. suited for use in and out of the.