fig2

Figure 2. Schematic showing the research content of miniature tactile sensors for interventional catheters, including the sensing mechanism, device structure, functional material, fabrication method and potential application direction. Figures of “Bronchoscopy procedure” quoted from Gil et al.^[11], “Respiratory measure” quoted from Kawaoka et al.^[12], “Trauma care surgery” quoted from Sharma et al.^[13], “Urodynamic test” quoted from Zhang et al.^[14], “Catheter ablation” quoted from Sitaramgupta et al.^[6] and “FFR measurement in a coronary artery” quoted from Van den Driesche et al.^[15]. FFR: Fractional flow reserve.