Table 1.
Sensing technologies using smart capsules
| Name | Dimension (mm) | Sensing parameters | Evaluation | |||
| pH | Temperature (°C) | Pressure (mm Hg) | Gas | |||
| Bravo72 | 25×6×5.5 | 1–7 | NA | NA | NA | CA, in vivo |
| alphaONE75 | 26.5×6×5.5 | 1–9 | NA | NA | NA | CA, in vivo |
| Heidelberg78 | 21×Ø 8 | 1–8 | NA | NA | NA | CA, in vivo |
| SmartPill81 | 26.8×Ø 11.7 | 0–9 | 25–49 | 0–350 | NA | CA, in vivo |
| eCelsius96 | 17.7×Ø 8.9 | NA | 25–45 | NA | NA | CA, in vivo |
| VitalSense97 | 23×Ø 8.7 | NA | 32–42 | NA | NA | CA, in vivo |
| CorTemp98 | 22.4×Ø 10.9 | NA | 10–50 | NA | NA | CA, in vivo |
| myTemp99 | 20×Ø 8 | NA | 30–45 | NA | NA | CA, in vivo |
| IntelliCap84 | 26.7×Ø 11 | 1–8 | 20–40 | NA | NA | CA*, in vivo |
| BEST88 | 38×8×4 | 1.9–12 | NA | NA | NA | LP, in vivo |
| Cheng et al 87 | 26×Ø 14.5 | 1–9 | NA | NA | NA | LP, in vivo |
| Xu et al 89 | 26×Ø 11 | 0–14 | 35–42 | 95–110 | NA | LP, in vivo |
| Zhao et al 90 | 22×Ø 11 | 1–10 | 34–42 | 70–150 | NA | LP, in vivo |
| Benken and Gianchandani102 | 24×Ø 12 | NA | NA | 0–262 | NA | LP, in vivo |
| Kim et al 107 | 30×Ø 13 | NA | NA | 0–1103 | NA | LP, in vivo |
| Rehan et al 106 | 30×Ø 12 | NA | NA | 0–265 | NA | LP, ex vivo |
| Kalantar-Zadeh et al 16 | 26×Ø 9.8 | NA | Yes | NA | Yes | LP, in vivo |
| Atmo Biosciences112 | 28×Ø 11 | NA | Yes | NA | Yes | CA, in vivo |
CA*, discontinued; CA, commercially available; LP, laboratory prototype; NA, not available.