Fig. 4From: Comparison of the effects of ketamine and fentanyl-midazolam-medetomidine for sedation of rhesus macaques (Macaca mulatta)Respiration monitoring. A soft lubricated tube was inserted in the ventral meatus of one of the nostril. The tube was linked to a side-stream capnograph providing the visualization of a waveform and end-tidal CO2 valueBack to article page