Effects of Inhaled Gases on the Ultrasound Contrast Produced by Microspheres Containing Air or Perfluoropropane in Anesthetized Dogs
| Autor: | Joseph E. Bugaj, Gary H. Brandenburger, James H. Wible, Jolette K. Wojdyla |
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| Rok vydání: | 1998 |
| Předmět: |
Time Factors
Nitrogen media_common.quotation_subject Video Recording Contrast Media chemistry.chemical_element Oxygen Microsphere Dogs Albumins Administration Inhalation Animals Contrast (vision) Drug Interactions Radiology Nuclear Medicine and imaging media_common Analysis of Variance Fluorocarbons Dose-Response Relationship Drug Inhalation Chemistry business.industry Ultrasound General Medicine Microspheres Echocardiography Anesthesia Injections Intravenous business Densitometry Biomedical engineering |
| Zdroj: | Investigative Radiology. 33:871-879 |
| ISSN: | 0020-9996 |
| DOI: | 10.1097/00004424-199812000-00005 |
| Popis: | Inhaled gas mixtures with increased amounts of oxygen cause air containing ultrasound contrast agents to lose efficacy faster than during the inhalation of air. The authors hypothesized that contrast materials containing relatively insoluble gases would decrease the effects of inhaled gases on the ultrasound contrast.Anesthetized dogs were ventilated with compressed air and different oxygen/nitrogen gas mixtures. Video densitometric analysis was performed on end diastolic ultrasound images of the heart after administration of Albunex (air-filled microspheres) or Optison (perfluoropropane-filled microspheres).Increased concentrations of oxygen caused no change in the contrast intensity produced by Optison in the left ventricular chamber. In the myocardium, however, increases in oxygen caused Optison to produce significantly less enhancement of the myocardial tissue.The use of perfluoropropane within albumin microspheres prevented the effects of inhaled gas mixtures on contrast produced within the left ventricular chamber. In the myocardium, increased concentrations of oxygen in the inhaled gas mixtures reduce contrast intensity. |
| Databáze: | OpenAIRE |
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