Ventilated Psychrometer

A Differential Psychrometer for Continuous Measurements of Transpiration.

Transpiration is frequently measured by enclosing plants, or portions of plants, in transparent chambers and determining the change of humidity of a stream of air before and after passing through the enclosure (2, 4). Although this procedure should not be used to estimate probable transpiration rates under natural conditions, unless adequate precautions are taken to ensure that the microenviron...

Uncertainty Analysis in Humidity Measurements by the Psychrometer Method

The most common and cheap indirect technique to measure relative humidity is by using psychrometer based on a dry and a wet temperature sensor. In this study, the measurement uncertainty of relative humidity was evaluated by this indirect method with some empirical equations for calculating relative humidity. Among the six equations tested, the Penman equation had the best predictive ability fo...

Pulsus paradoxus in ventilated and non-ventilated patients.

Human physiology changes are often amplified in disease states and may be altered when a patient is mechanically ventilated. Normally, systolic blood pressure is slightly lower during inspiration than expiration due to the change in intrathoracic pressure. Pulsus paradoxus is a phenomenon in which the difference in systolic blood pressure (BP) between inspiration and expiration is more than 10 ...

Ventilated Glass Contact Lenses.

Overdistension in ventilated children

Ventilating patients with acute respiratory failure according to standardized recommendations can lead to varying volume-pressure (V-P) relationships and overdistension. Young children may be more susceptible than adults to overdistension, and individual evaluation of the effects of ventilator settings is therefore required. Three studies have applied indices for the detection of overdistension...