Measurement Errors in Pneumotachography Due to Pressure Transducer Design

A new optical transducer for arterial pressure measurement.

A new optical pressure transducer system (Viggo) has been assessed and compared with a standard P10 transducer (Spectramed) using a similar 20-gauge cannula, both in vitro in terms of linearity and frequency response and in vivo using an animal model. The linearity of the transducers was comparable; the resonant frequencies were 106 Hz and 75 Hz, respectively. However, the resonant frequency of...

Measurement of Radiation Emission Due to Atmospheric-Pressure Plasma Sterilization

The field of Atmospheric-pressure plasmas has been the focus of many researchers and scientists in the past decade. These specific types of systems are favored because of the few requirements needed for its functioning. Plasmas’ use as a sterilizer is being rapidly explored. Thus, in this process it has become necessary to understand the effect of UV radiation produced during the plasma dischar...

Epidural intracranial pressure measurement in rats using a fiber-optic pressure transducer.

Elevated intracranial pressure (ICP) is a significant problem in several forms of ischemic brain injury including stroke, traumatic brain injury and cardiac arrest. This elevation may result in further neurological injury, in the form of transtentorial herniation(1,2,3,4), midbrain compression, neurological deficit or increased cerebral infarct(2,4). Current therapies are often inadequate to co...

An adjustable blood pressure cuff to correct errors due to variations in arm circumference.

A well-recognized source of error in the indirect measurement of blood pressure results from using the standard sphygmomanometer cuff for arms of widely different diameters (Pickering, 1955). When the arm is thicker than usual, blood pressure readings are higher than those obtained by direci intra-arterial measurement; when the arm is thinner; the readings are lower. Hence, for correct indirect...

Criteria for the Design of Pressure Transducer Adapter Systems