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Table 1 Electrogastrography in young mature female experimental pigs

From: The effect of general anaesthesia on gastric myoelectric activity in experimental pigs

Parameter

Period A

Period B

Period C

Period D

Statistical significance *

Thiopental

2.58

2.81

2.34

2.58

NS

n = 5

2.11 – 3.52

2.11 – 3.28

2.11 – 3.28

2.11 – 3.28

Isoflurane

3.05

3.05

3.28

3.28

NS

NS

n = 5

2.81 – 3.75

2.58 – 3.52

3.05 – 3.75

2.58 – 3.52

p = 0.004

NS

Nitrous oxide

3.05

3.05

3.28

3.28

p < 0.001

p < 0.001

n = 5

2.58 – 3.28

2.70 – 3.28

2.81 – 3.52

3.05 – 3.52

p = 0.003

p < 0.001

Nitrous oxide + isoflurane

2.58

2.81

2.70

2.58

NS

p = 0.030

n = 5

2.58 – 3.28

2.34 – 3.28

2.34 – 3.28

2.11 – 3.05

NS

     

p = 0.037

  1. Period A: a 15-minute baseline EGG recording was started 30 minutes after intramuscular injection of ketamine and azaperon.
  2. Period B: a 15-minute baseline EGG recording was started 45 minutes after intramuscular injection of ketamine and azaperon.
  3. Period C: a 15-minute EGG recording under continuous general anaesthesia (started immediately after the beginning of general anaesthesia).
  4. Period D: a 15-minute EGG recording under continuous general anaesthesia (started 15 minutes after the beginning of general anaesthesia).
  5. * Statistical significance: Period A vs. C, A vs. D, B vs. C, B vs. D (using Kruskal-Wallis One Way Analysis of Variance).
  6. NS - not significant.
  7. Dominant frequency of slow waves (cycles per minute), expressed as median and inter-quartile range.