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. Author manuscript; available in PMC: 2018 Jan 1.
Published in final edited form as: Surg Endosc. 2016 Apr 29;31(1):477–486. doi: 10.1007/s00464-016-4936-4

Figure 1.

Figure 1

Novel and reference electrode devices. A, B. The novel laparoscopic device, shown with the recording tip fully deployed (A) and partially retracted (B). The flexible recording catheter of the laparoscopic device (diameter 2.2 mm, length 330 mm) can be readily passed through a 5 mm laparoscopic port. The head consists of 32 recording channels in a spiral arrangement (5 mm spacing) that is positioned against the serosa for data collection. C, D. Reference flexible printed circuit board arrays used for device validation. Two configurations were used: (C) A 32 channel array (4 × 8 electrodes; 4 mm spacing); and (D) a 128 channel array (16 × 8 electrodes, 5.2 mm spacing).