•Txhim kho nrog lub teeb ci LCD, cov duab meej thiab xim sib txawv qhia tau hais tias lub trajectory ntawm cov ntaub ntawv kom meej meej.•Raws li ntau zaus network impedance ntsuas tshuab thiab tsis siv neeg calibrating xyuas kom meej qhov ntsuas yog.•Autoclavable ntaub ntawv clip, ntaub ntawv nuv, ntaub ntawv sojntsuam.Tsis txhob kis kab mob kis tau zoo.•Thaum ua qhov ntsuas, qhov kev hloov ntawm lub suab tuaj yeem qhia qhov chaw ntawm cov ntaub ntawv hauv lub hauv paus-kwj dej.