ausgeatmete

Ausgeatmete is the past participle and adjective form of the German verb ausgeatmen, meaning to exhale. It is used to describe air or gases that have been breathed out, as in phrases like ausgeatmete Luft or ausgeatmete Gase. In scientific and medical writing, the term often appears in contexts dealing with the composition and properties of exhaled air.

In everyday language and in German scientific literature, ausgeatmete Luft refers to the air that leaves the lungs after a breath. The concept is central to respiratory physiology, since exhaled air differs from inspired air due to gas exchange in the lungs and the presence of water vapor from the respiratory tract.

Typical composition and properties of exhaled air include a lower oxygen fraction and a higher carbon dioxide fraction compared with inhaled air. In humans, exhaled air generally contains about 16 percent oxygen, 4–5 percent carbon dioxide, and the remainder nitrogen, with nearly saturated water vapor and a temperature around 34–36 degrees Celsius at the end of expiration. This contrasts with ambient air, which contains about 21 percent oxygen, about 0.04 percent carbon dioxide, and is cooler and drier.

Clinical and research uses of exhaled (ausgeatmete) air include capnography, which monitors CO2 in exhaled breath to assess ventilation, and the analysis of exhaled breath for biomarkers in respiratory and metabolic studies. Exhaled breath analysis, including volatile organic compounds, is explored for disease screening, monitoring, and understanding metabolic processes. The study of ausgeatmete Luft thus spans physiology, clinical diagnostics, and biomedical research.