A comparison of changes in esophageal pressure and regional juxtacardiac pressures
| Autor: | O. A. Smiseth, O. Veddeng |
|---|---|
| Rok vydání: | 1990 |
| Předmět: |
Physiology
medicine.medical_treatment Positive pressure Hemodynamics Balloon Muscle Smooth Vascular Catheterization Positive-Pressure Respiration Dogs Esophagus Physiology (medical) Pressure Animals Medicine Thoracotomy Lung business.industry Balloon catheter Heart respiratory system Pleural cavity Respiratory Function Tests respiratory tract diseases Femoral Artery medicine.anatomical_structure Anesthesia Pleura business circulatory and respiratory physiology |
| Zdroj: | Journal of Applied Physiology. 69:1053-1057 |
| ISSN: | 1522-1601 8750-7587 |
| DOI: | 10.1152/jappl.1990.69.3.1053 |
| Popis: | The relationship between esophageal pressure and juxtacardiac pressures was studied during positive end-expiratory pressure (PEEP) ventilation applied to both lungs or selectively to one lung. The experiments were performed in eight anesthetized dogs with balloon catheters in the esophagus and in the left and right pericardial and overlying pleural cavities and with an open-ended liquid-filled catheter in the pleural cavity. Bilateral PEEP (10, 20, and 30 cmH2O) caused progressive and similar increments in left and right pleural pressure. Selective PEEP, however, increased ipsilateral pleural balloon pressure more than contralateral pressure. The increase in ipsilateral pleural balloon pressure markedly exceeded the increase in esophageal pressure. There was a small increase in pleural open-ended catheter pressure that approximated the increase in esophageal pressure. During selective PEEP, pericardial balloon pressure remained uniform because of a decrease in ipsilateral pericardial transmural pressure. In conclusion, selective PEEP caused nonuniform increments in regional pleural balloon pressure. Left and right pericardial balloon pressure, however, increased uniformly with selective PEEP because of reduced ipsilateral pericardial transmural pressure. The esophageal balloon did not reflect the marked regional increments in pleural balloon pressure with selective PEEP and consistently underestimated the changes in pleural balloon pressure with general PEEP. |
| Databáze: | OpenAIRE |
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