BACKGROUND AND OBJECTIVES: Monitoring of vital functions is one of the most important tools in the management of critically ill patients. Nowadays is possible to detect and analyze a great deal of physiologic data using a lot of invasive and non-invasive methods. The intensivist must be able to select and carry out the most appropriate monitoring technique according to the patient requirements and taking into account the benefit/risk ratio. Despite the fast development of non invasive monitoring techniques, invasive hemodynamic monitoring using Pulmonary Artery Catheter still is one of the basic procedures in Critical Care. The aim was to define recommendations about clinical utility of basic hemodynamic monitoring methods and the Use of Pulmonary Artery Catheter. METHODS: Modified Delphi methodology was used to create and quantify the consensus between the participants. AMIB indicated a coordinator who invited more six experts in the area of monitoring and hemodynamic support to constitute the Consensus Advisory Board. Twenty-five physicians and nurses selected from different regions of the country completed the expert panel, which reviewed the pertinent bibliography listed at the MEDLINE in the period from 1996 to 2004. RESULTS: Recommendations were made based on 55 questions about the use of central venous pressure, invasive arterial pressure, pulmonary artery catheter and its indications in different settings. CONCLUSIONS: Evaluation of central venous pressure and invasive arterial pressure, besides variables obtained by the PAC allow the understanding of cardiovascular physiology that is of great value to the care of critically ill patients. However, the correct use of these tools is fundamental to achieve the benefits due to its use.