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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.