Comparison of different methods for measuring intra-abdominal pressure

Abstract

In our porcine model, and increasing the IAP by means of instillation of Ringer's solution, a reliable estimation of the IAP was obtained by measuring the pressure in the urinary bladder, the femoral vein or the inferior caval vein. The IAP estimated indirectly as the urinary bladder pressure is affected by the amount of fluid in the bladder, which should not exceed 10-15 ml. The decrease in femoral vein blood flow reflects the changes in inferior caval vein flow during increased IAP.

Does femoral venous pressure measurement correlate well with intrabladder pressure measurement? A multicenter observational trial

“…We recently found, in an animal experimental study (13 pigs), that FVP correlated well with bladder pressure [12]. This correlation has been found by others [13][14][15].…”

Measurement of compartment pressure of the rectus sheath during intra-abdominal hypertension in rats

“…IVP measurement in the presence of bladder trauma, peritoneal adhesions, pelvic fractures and hematoma, abdominal packing, or neurological bladder disorders may lead to overestimation of IAP [8]. In addition, the validity of measurements may depend on fluid instillation into the bladder before measurement [20,21].…”

Measuring Intrabladder Pressure With the Head of the Bed Elevated 30º: Evidence to Support a Change in Practice

“…To provide such validation, studies must be conducted where intraabdominal pressure is measured directly in patients by placement of intraperitoneal catheters. 43,44 These techniques are not standard practices in the ICU, and their use would significantly increase the risk to patients and cannot be ethically justified. The lack of direct measurement of intra-abdominal pressure is a limitation of the present study, as with all other clinical studies assessing the effects of the volume of saline instilled into the patient's bladder and position on IBP.…”