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Table 2 Physiologic IAP in pregnancy

From: Intra-abdominal pressure, intra-abdominal hypertension, and pregnancy: a review

Author Year n Gestation Positions during IAP measurement IAPmean (mmHg) Comments
Paramore [10] 1913 24 6 months to term Supine; left side; knee chest; standing Range 15 to 44 Rectal manometer; ambulatory subjects
Cuppett et al. [62] 2008 40 Term Supine; Left Lateral Not reported Elective CS under spinal anesthesia
Sugerman [49] 2011 5 39 weeks Supine; Left Lateral decubitus 25 ± 3; 23 ± 3 Unclear methods; likely ambulatory patients
Al-Khan et al. [32] 2011 100 36 to 41 weeks Leftward tilt 22 ± 2.9 Elective CS; Unspecified leftward tilt; 50 ml saline instilled in bladder; unclear reference point
Chun et al. [33] 2012 20 38 to 40 weeks Supine; Leftward tilt 10 ± 4.7 8.9 ± 4.9 Elective CS under spinal anesthesia; leftward tilt 100
  1. IAPmean, mean intra-abdominal pressure; n, number; CS, caesarean section.