A Flexible Multiring Concentric Electrode for Non-Invasive Identification of Intestinal Slow Waves

Figures

• 

  Figure 1. (a) Multi-ring concentric electrode; (b) Dimensions (in mm) of poles and annotation of signals sensed by each pole.

• 

  Figure 2. (a) Magnification view of a track of electrode; (b) Right: thickness of view A–B; average thickness is 20 µm measured by Profilm 3D (Filmetrics, San Diego, CA, USA) with 20× lens.

• 

  Figure 3. (a) Template design, size in mm; (b) Multi-CRE with foam; (c) Multi-CRE with adhesive.

• 

  Figure 4. Location of electrodes and accelerometer (covered by adhesive tape). (a) Multi-CRE in BN position and conventional bipolar recording in AN position, reference electrode for monopolar measurements on left hip; (b) multi-CRE in AN position and conventional bipolar recording in BN position.

• 

  Figure 5. (a) Thirty seconds of signals: monopolar concentric (MC1-5), bipolar concentric (BC1-4) with adhesive material below navel position; bipolar (BIP), respiration (RESP), ECG ML-Lead I and accelerometer signals (X, Y, Z); (b) Power spectral density of signals shown on the left.

• 

  Figure 6. IRGlobal for each combination of factors: configuration (MC: monopolar concentric; BC: bipolar concentric), material (Ad: adhesive; Fo: foam) and position (AN: above navel; BN: below navel).

• 

  Figure 7. IRGlobal for each concentric bipolar configuration (BC1-EEnG, BC2-EEnG, BC3-EEnG and BC4-EEnG) and conventional bipolar (BIP).