Table 2 Categories of reported operational difficulties

Activation

(Jeannerot et al., 2016)

Buttons

(Fujioka et al., 2015; Rohrer et al., 2013)

Feedback - audible

(Lange et al., 2015; Varunok et al., 2011)

Feedback - visible

(Lange et al., 2015; Lange et al., 2014)

Packaging

(Guerlain et al., 2010b)

Safety cap

(Lange et al., 2015; Pachon et al., 2014; Demary et al., 2014; Domańska et al., 2017; Guerlain et al., 2010b)

Site disinfection

(Jeannerot et al., 2016)

Washing hands

(Jeannerot et al., 2016)