infiltraat

Infiltraat is a Dutch noun with multiple, context-dependent meanings. In filtration science, infiltrate (more commonly in English as filtrate) refers to the liquid that has passed through a filter medium during a filtration process. The material retained by the filter is called the retentate. The composition of the infiltrate depends on the starting solution and the filter’s characteristics, and it may be subjected to further analysis such as chemical assays or concentration measurements.

In medical and clinical language, infiltraat describes a localized collection of material within tissue, usually as a result of inflammation, infection, or edema. In radiology and patient care, a pulmonary infiltrate denotes an area of increased density on chest imaging, caused by substances such as fluid, pus, or inflammatory cells within the lung parenchyma. An infiltrate is a descriptive finding rather than a diagnosis; additional tests and clinical context are required to identify the underlying cause, which can include pneumonia, heart failure–related edema, or hemorrhage.

Usage and translation considerations: the term infiltraat is common in Dutch-language medical literature and is typically translated as infiltrate in English. The concept spans both technical filtration language and clinical imaging language, so its precise meaning depends on the disciplinary context.