Lateral position improves wedge-left atrial pressure correlation during positive-pressure ventilation
| Autor: | Faysal M. Hasan, Albert S. Most, Anthony L. Malanga, Sidney S. Braman, William M. Corrao |
|---|---|
| Rok vydání: | 1984 |
| Předmět: |
medicine.medical_specialty
Supine position business.product_category Critical Care Swine medicine.medical_treatment Critical Care and Intensive Care Medicine Positive-Pressure Respiration Internal medicine mental disorders medicine Animals Pulmonary Wedge Pressure Pulmonary wedge pressure Lung Pulmonary gas pressures business.industry Pulmonary artery catheter Central venous pressure respiratory system Atrial Function Wedge (mechanical device) Catheter medicine.anatomical_structure Cardiology business |
| Zdroj: | Critical Care Medicine. 12:960-964 |
| ISSN: | 0090-3493 |
| Popis: | Because lateral position can be used to locate a pulmonary artery catheter tip in lung regions where venous pressure exceeds alveolar pressure, we studied the effect of lateral position on the correlation between pulmonary artery occlusion pressure (Pw) and left atrial pressure (Pla) at various increments of positive-end expiratory pressure (PEEP). In ten normal anesthetized pigs, catheters were placed in the left atrium and right and left pulmonary arteries; simultaneous measurements of Pla and Pw from both catheters were obtained in the supine, right lateral, and left lateral positions. Pw obtained in the lateral position when the catheter tip was vertically located below the left atrium ("lower") more accurately reflected Pla changes than Pw obtained from catheters above the left atrium, at PEEP levels less than 20 cm H2O. Although most catheter tips were located below the left atrium in the supine position, our data from the lower catheter more accurately assessed Pla than did the Pw obtained in the supine position; this was particularly evident when the catheter tip was located vertically above the left atrium. These findings suggest that the lateral position can be useful in measuring Pw during continuous positive-pressure ventilation. However, further studies in humans are needed before this maneuver can be recommended. |
| Databáze: | OpenAIRE |
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