IAP measurementsshould be:

• The current reference standard IAP measurement method is the pressure measured via an indwelling urinary drainage catheter within the bladder

• Expressed in mmHg (1 mmHg = 1.36 cm H2O)

• Measured at end-expiration

• Performed in the supine position

• Zeroed at the iliac crest in the mid-axillary line

• Performed with an instillation volume of no greater than 25 mL of saline [1 mL/kg for children up to 20 kg] (for bladder technique)

• Measured 30-60 seconds after instillation to allow for bladder detrusor muscle relaxation (for bladdertechnique)

• Esquema 1

• Esquema 2