Comparative Study of the Accuracy of Two Fiberoptic Mixed Venous Saturation Catheters (Spectracath® vs Opticath®) during Acute Changes in Hematocrit and Cardiac Output in Humans

Woerkens, E. C. S. M. Van; Trouwborst, A.; Snel, L.; Vliet, André van; Tenbrinck, R.

doi:10.1007/978-1-4615-3428-0_60

Cited by 6 publications

(2 citation statements)

References 6 publications

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“…However, because we found a reduction of agreement between both methods in the control group, this study may be limited to conclude that ANH hinders the reproducibility of CCO measurement. Regarding SvO 2 measurement, the reproducibility and accuracy were very similar in both techniques in the control and the hemodiluted animals, corroborating previous studies (39–41).…”

Section: Discussionsupporting

confidence: 89%

Comparison Between Intermittent and Continuous Measurement of Cardiac Output After Acute Normovolemic Hemodilution in Pigs

et al. 2006

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Continuous cardiac output (CO) and mixed venous oxygen saturation (SvO2) determined through the pulmonary artery catheter may be helpful in monitoring hemodynamic conditions in critically ill patients. This study aimed to evaluate CO and SvO2 in a model of acute normovolemic hemodilution (ANH), analyzing the accuracy of the continuous versus intermittent method for CO and SvO2 measurement in pigs. Twenty-three pigs were enrolled to three groups: control, ANH with 6% hydroxyethyl starch (HES), or ANH with lactated Ringer's (LR) solution. After hemodilution, we showed that SvO2 was reduced in both groups, mainly in LR animals (P < 0.05). Regarding the evaluation of CO, we showed an increase in both groups submitted to ANH (P < 0.05). Through Bland-Altman analysis, we showed that the continuous CO catheter presented lower values than the intermittent method after hemodilution, mainly with HES (P < 0.001), and there was no difference in the measurement of SvO2. The ANH promoted a decrease in SvO2 and an increase in CO values, mainly in animals submitted to hemodilution with HES. The use of continuous and intermittent (laboratory) measurement of SvO2 showed clinical applicability and good agreement, an effect not reproduced by the CO measurement. New studies are needed to further investigate the agreement between the continuous and intermittent methods for the measurement of CO in adverse hemodynamic conditions such as ANH.

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Section: Discussionsupporting

confidence: 89%

Comparison Between Intermittent and Continuous Measurement of Cardiac Output After Acute Normovolemic Hemodilution in Pigs

et al. 2006

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“…The accuracy of continuous measurement has been tested in vitro and in vivo [35-38]. In both the correlation is good and bias – in those studies that reported it – is small.…”

Section: Parameters From the Pulmonary Artery Cathetermentioning

confidence: 99%

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Robin¹,

Costecalde²,

Lebuffe³

et al. 2006

Crit Care

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The usefulness of parameters measured using the pulmonary artery catheter has been challenged because no benefit in patient outcome has been observed in clinical trials. However, technological advances have been made, including continuous measurement of cardiac output (CO), mixed venous saturation (SvO2), and right ventricle end-diastolic volume (CEDV) have been made. Pulmonary artery occlusion pressure (PAOP), CEDV and right atrial pressure (RAP) are not good predictors of fluid load responsiveness except when very low. Despite this methodological limitation, variation of these parameters during fluid loading remains a good indicator of fluid challenge tolerance. Accuracy of continuous thermodilution and SvO2 measurement has been demonstrated in vitro and at bedside. A decrease in SvO2 is a global index of an inadequate oxygen delivery (DO2)/oxygen requirement relationship. In this setting, a therapeutic decision to improve determinants of SvO2 should be considered with the help of all other PAC parameters. Technological improvement transforms PAC in a real time integrated physiological device and allows one to observe the impact of therapeutic intervention. What we need now is a clinical trial with a PAC-guided treatment algorithm taking into account the above integrated PAC parameters.

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Role of oximeter error in the diagnosis of shunts

Shepherd

McMahan²

1996

Cathet. Cardiovasc. Diagn.

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Comparative Study of the Accuracy of Two Fiberoptic Mixed Venous Saturation Catheters (Spectracath® vs Opticath®) during Acute Changes in Hematocrit and Cardiac Output in Humans

Cited by 6 publications

References 6 publications

Comparison Between Intermittent and Continuous Measurement of Cardiac Output After Acute Normovolemic Hemodilution in Pigs

Comparison Between Intermittent and Continuous Measurement of Cardiac Output After Acute Normovolemic Hemodilution in Pigs

Untitled

Role of oximeter error in the diagnosis of shunts

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