- Meeting abstract
- Open Access
Comparative analysis of SVO2 of samples drawn in the superior cava vein and pulmonary artery
© BioMed Central Ltd 2003
- Published: 25 June 2003
- Pulmonary Artery
- Organic Dysfunction
- Easy Access
- Comparative Method
To assess the correlation between the SVO2 drawn in the superior cava vein and pulmonary artery.
Bearing in mind the importance of the early detection and correction of tissue hypoxia to avoid the progressive organic dysfunction and death, SVO2 has been used as a prognosis index and as a therapeutic answer. Therefore, this study aims at the assessment of the correlation between the SVO2 drawn in the superior cava vein, which shows itself as an easier access route and also of lower cost, and the SVO2 drawn in the pulmonary artery, aiming to facilitate and optimize the cost of one more index of assessment of the use of oxygen.
We are dealing with a transverse study with the record of pieces of information on the mixed venous blood samples drawn in the superior cava vein and pulmonary artery for comparative analysis of the mixed SVO2 in the period of January through May scheduled until November 2003. The samples were chosen randomly and through simple analysis according to a collecting protocol which consists of using 5 ml mixed venous blood, collected with a previously heparinized (0.1 ml heparin) syringe and with a total suction time of 20 s. The analysis was made in a gasmeter brand Radiometer (model ABL5) immediately after collecting. The data are evaluated through the hypothesis test in which the void hypothesis equals the average and the alternative is the difference between them. The statistic is confirmed through the Student t method and the correlation through the Pearson index. The correlation between the SVO2 value collected in the superior cava vein and the pulmonary artery as a comparative method is evaluated.
The preliminary results indicate a Pearson coefficient of 0.6. The Student t test shows that the probability of results coming from a different distribution is 0.4, indicating that the void hypothesis is true.