Extended Data Fig. 4: WiSe suture breakage test.
From: Wirelessly operated bioelectronic sutures for the monitoring of deep surgical wounds
a, Schematic of test setup for simulating suture breakage under 2.5 cm porcine tissue. b, Heatmap of the received harmonic signal power as a function of the length of the left segment of the suture L' and the angle θ of the unravelled segment. c, Corresponding measured harmonic signal at 2.4 GHz. The signals are normalized to the initial suture state (0 dB). The angle θ is used to vary the effective length of the dipole antenna formed by the suture. In clinical applications, the unravelled segment is expected to spontaneously bunch together due to agitation by natural body motions61, which also leads to reduction of the effective dipole antenna length.
