Emissions of combustion products from unvented kerosene heaters were measured in an exhaust system used to ventilate the units. Measurements of carbon monoxide, nitrogen dioxide, sulfur dioxide, formaldehyde and particulates are reported and compared with the results of several other studies. Dilution ventilation requirements to maintain occupational and air quality standards are presented.

The ultrasonic appearance of retroperitoneal fibrosis is characteristic: a smooth-bordered and relatively echo-free mass anterior to the sacral promontory. Sonography can be used to confirm the diagnosis, follow response to therapy and detect hydronephrotic changes in the kidneys.

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