A non-invasive method for gastrointestinal parameter monitoring

Table 1 Range and precision of each sensor.

Sensor	Range	Precision
Pressure	-60 to +200 mmHg	1% FS
Temperature	34 to 42 °C	±0.2 °C
pH	1 to 13	±0.2

Table 2 Weight and dimension of each capsule.

Parameter	PT capsule	pH capsule
Diameter (mm)	10	10
Length (mm)	21.1	24
Weight (gram)	2.9	5.2

Table 3 Volunteers and CIB time.

Volunteer no.	Sex	Age (yr)	CIB time (h)
1	M	42	25.78
2	M	52	33.83
3	M	34	28.22
4	F	50	11.72
5	M	55	19.07
6	M	54	33.12
7	M	49	18.77

M: male; F: female; CIB time: capsule in body time.

Table 4 Pressure data.

Pressure		Gauge data
(kPa)	(mmHg)	Up	Down	Up	Down
-8	-60	-59.6	-60	-60.4	-60.7
-4	-30	-29.3	-28.9	-30.4	-30.6
0	0	0	1.2	-0.4	-0.4
5.33	40	38	40.4	38	39.3
10.67	80	79	80.7	79	79.8
16	120	121.2	121.8	120.8	121.2
21.33	160	161.7	162.5	159.9	160.9
26	200	200.8	199.8	199.8	199.8

1 mmHg = 0.133322 kPa.

Table 5 Temperature data.

Temperature (°C)	Gauge data
34	34.02
36	35.91
38	38.03
40	40.06
42	42.11

Table 6 pH data.

pH	Gauge data
	1	2	3	4	5
4	4.4	4.3	4.3	4.3	4.4
6.86	6.7	6.7	6.8	6.7	6.7
9.18	9.2	9.3	9.3	9.2	9.3