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Randomized Controlled Trial
. 2009 Apr 21:9:5.
doi: 10.1186/1471-2482-9-5.

Direct intra-abdominal pressure monitoring via piezoresistive pressure measurement: a technical note

Jens Otto  1 , Daniel Kaemmer, Marcel Binnebösel, Marc Jansen, Rolf Dembinski, Volker Schumpelick, Alexander Schachtrupp
Affiliations
Randomized Controlled Trial

Direct intra-abdominal pressure monitoring via piezoresistive pressure measurement: a technical note

Jens Otto et al. BMC Surg. .

Abstract

Background: Piezoresistive pressure measurement technique (PRM) has previously been applied for direct IAP measurement in a porcine model using two different devices. Aim of this clinical study was to assess both devices regarding complications, reliability and agreement with IVP in patients undergoing elective abdominal surgery.

Methods: A prospective cohort study was performed in 20 patients randomly scheduled to receive PRM either by a Coach-probe or an Accurate(++)-probe (both MIPM, Mammendorf, Germany). Probes were placed on the greater omentum and passed through the abdominal wall paralleling routine drainages. PRM was compared with IVP measurement by t-testing and by calculating mean difference as well as limits of agreement (LA).

Results: There were no probe related complications. Due to technical limitations, data could be collected in 3/10 patients with Coach and in 7/10 patients with Accurate++. Analysis was carried out only for Accurate++. Mean values did not differ to mean IVP values. Mean difference to IVP was 0.1 +/- 2.8 mmHg (LA: -5.5 to 5.6 mmHg).

Conclusion: Direct IAP measurement was clinically uneventful. Although results of Accurate++ were comparable to IVP, the device might be too fragile for IAP measurements in the clinical setting. Local ethical committee trial registration: EK2024.

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Figures

Figure 1
Figure 1
Pairwise measurements (n = 21) of intravesicular pressure and intraabdominal pressure measured directly using a piezoresistive probe (APRM). The probe was place on the greater omentum in 7 patients undergoing elective abdominal surgery. Difference vs. mean value according to Bland and Altman [16].
See this image and copyright information in PMC

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