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  Indian J Med Microbiol
 

Figure 4: Transverse spinous process view, when the transducer is positioned directly over the spinous process at the C4 level. Note: Spinous process is small and bifid (arrows). The images were obtained by means of a Sonoscape P50 Ultrasound (Sonoscape Europe s.r.l., Rome, Italy). The O2-O,/sub>3 mixture was produced by means of a Multiossigen Medical 99IR generator (Multiossigen S.p.A., Gorle, Bergamo, Italy).

Figure 4: Transverse spinous process view, when the transducer is positioned directly over the spinous process at the C4 level. 
Note: Spinous process is small and bifid (arrows). The images were obtained by means of a Sonoscape P50 Ultrasound (Sonoscape Europe s.r.l., Rome, Italy). The O<sub>2</sub>-O,/sub>3</sub> mixture was produced by means of a Multiossigen Medical 99IR generator (Multiossigen S.p.A., Gorle, Bergamo, Italy).