Intravenous sensitivity testing

Testing of visceral sensitivity.

Under normal circumstances most of the visceral input to the central nervous system is not perceived consciously. Visceral hypersensitivity associated with altered reflex activity seems to be a common pathophysiological mechanism in functional gastrointestinal disorders. Investigation of visceral sensitivity in humans is based on distension tests using barostat, or tensostat more recently. Tens...

HIV Testing: Sensitivity and Specificity

The broader field of HIV diagnostics also includes tests to monitor the health of PLHIV, including immune system function and the effectiveness of antiretroviral treatment. Of these diagnostic tests, the most commonly used are tests to measure CD4 count and viral load. These technologies are crucial for determining when to initiate treatment and when to adjust antiretroviral regimens. They are ...

High sensitivity cardiac troponin testing.

Bösner and colleagues have presented evidence for a simple rule for ruling out coronary artery disease in the primary care setting. It is noteworthy that no laboratory measurements have been included in their model, with reference to their introductory statement that “ ... electrocardiography and cardiac troponin test are of limited value in primary care... ” This point deserves some discussion...

High-sensitivity photoacoustic leak testing.

The photoacoustic effect may be exploited for the detection and localization of gas leaks from otherwise sealed components. The technique involves filling the test component with a tracer gas, and radiating the component to produce photoacoustic sound from any leak site where tracer gas is present. This paper describes demonstration experiments utilizing 10.6-micro radiation from a carbon-dioxi...

Testing and reporting contrast sensitivity.