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Crit Care Resusc ; 13(3): 151-5, 2011 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-21880001

RESUMO

OBJECTIVE: To compare venous pressure and haemoglobin oxygen saturation measured from a catheter in the superior vena cava (SVC) with a catheter inserted via the femoral vein, and to assess the agreement of these measurements. To assess the effect of intra-abdominal pressure and intrathoracic pressures on these measurements. DESIGN, SETTING AND PARTICIPANTS: Prospective study of patients in an adult intensive care unit, Alfred Hospital, Melbourne, Australia. MAIN OUTCOME MEASURES: Central venous pressure (CVP), femoral venous pressure (FVP), venous haemoglobin oxygen saturation in the SVC (SO2C) and via the femoral vein (SO2F), agreement between these measures using the Bland-Altman method, and the effect of intra-abdominal pressure and intrathoracic pressure. RESULTS: 43 patients were included; the mean bias for FVP -CVP was 1.05 mmHg (95% CI, 0.30-1.79 mmHg), with limits of agreement of -3.79 to 5.89 mmHg (95% CI, -5.08 to 7.18 mmHg). The bias for SO2F -SO2C was -3.21 (95% CI, -6.33 to -0.10), with limits of agreement of -22.43 to 16.01 (95% CI, -27.81 to 21.39). Intra-abdominal pressure had a significant (P < 0.01) effect on both the FVP and on the difference (FVP -CVP). CONCLUSIONS: This study demonstrates poor agreement between CVP and FVP and between SO2C and SO2F and that the measurements taken from these two sites are not interchangeable clinically.


Assuntos
Cateterismo Venoso Central/métodos , Pressão Venosa Central , Oxigênio/sangue , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Veia Femoral , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Reprodutibilidade dos Testes , Veia Cava Inferior , Adulto Jovem
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