2.4. Pressure Transducer The Endevco model 8507-C2 pressure transducer (figure 10) was used for the present measurements. It is a high sensitivity piezoresistive, circular-deflection-type, pressure transducer that has a nominally flat frequency response from 0-70 kHz with a rated sensitivity of 130 mV/psi and a full scale output of 300 mV. The transducer contains an active four-arm strain gage ...

For hemodynamic monitoring, the pressure transducer is suggested to be fixed at the level of the phlebostatic axis in critically ill patients [1,2]. The correction and adjustment of pressure transducer are emphasized in central venous pressure monitoring in clinical practice. The exact position of the transducer is relatively easy to be ignored for invasive arterial blood pressure monitoring [3...

The phased-array ultrasound transducer types are utilities for medical ultrasonography as well as optical imaging. However, their discontinuity characteristic limits the applications due to the artifacts contaminated into the reconstructed images. Because of the effects of the ultrasound pressure field pattern to the echo ultrasonic waves as well as the optical modulated signal, the side lobes ...

The main objective of this paper is to employ basic modal testing principles in order to assess the dynamic behavior of fluid filled catheter in invasive pressure measurements. This type of dynamic measurement is particularly suitable in biomedical engineering applications, where accurate blood pressure readings are required in order to assess the patient real condition. The measurement procedu...

Aims: To compare the pressure inside and outside the pig eye in relation to the location of cannulation for the injection of liquid into the anterior or vitreous chamber. Method: Eleven enucleated pig eyes were used. 46 measurements of intraocular pressure IOP were taken with a Perkins tonometer when the eye was cannulated in the anterior chamber. 49 measurements were taken when the eye was can...

The measurement of the interface pressure between a biomedical device and part of the human body is useful to improve the performance and safety of such devices during design. Testing of a selection of existing interface pressure transducers has demonstrated that many are dependent on device and tissue compliance. Such a transducer is useful only in an application where it has been calibrated f...