orifice area造句

• This is known as the regurgitant orifice area, and correlates with the size of the defect in the mitral valve.
• One particular echocardiographic technique used to measure the orifice area is measurement of the proximal isovelocity surface area ( PISA ).
• Haemodynamic performance in terms of effective orifice area of DAH was outstanding compared to all other options and no calcification of the DAH has been observed to date.
• For interpretation of these values, the area is generally divided by the body surface area, to arrive at the patient's optimal aortic valve orifice area.
• An application might be a low pressure ( e . g ., ) gas with a small orifice diameter ( e . g ., for an orifice area of and approximate force of ).
• The flaw of using PISA to determine the mitral valve regurgitant orifice area is that it measures the flow at one moment in time in the cardiac cycle, which may not reflect the average performance of the regurgitant jet.