In Vitro Analysis of Performance of Porcine Xenografts with Inward Bending of Stent Posts: Real-time Measurement of Valve Orifice Area Using an Area Meter

Akiyama, K; Sawatani, O; Imamura, Eisaburo; Koyanagi, Hitoshi; Higashidate, M; Tamiya, Kouichi

doi:10.1016/s0003-4975(10)65937-1

The Annals of Thoracic Surgery

1988

DOI: 10.1016/s0003-4975(10)65937-1

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In Vitro Analysis of Performance of Porcine Xenografts with Inward Bending of Stent Posts: Real-time Measurement of Valve Orifice Area Using an Area Meter

K Akiyama¹,

O Sawatani²,

Eisaburo Imamura³

et al.

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1991

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An in vivo area meter for real-time measurement of cross-sectional area in the cardiovascular system

Tamiya¹,

Higashidate²,

Beppu³

1991

Clin. Phys. Physiol. Meas.

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A direct real-time recording of the cross-sectional area of the heart valve is useful for the fluid dynamic study of the cardiovascular system. Electronic circuitry is described that is capable of driving the transmitter coil assembly placed outside the animal and detecting an area-related signal induced in the one-turn coil in vivo. When a piece of fine pliable metal thread encircles the area of interest (e.g. the mitral/aortic valve orifice) so as to form a single loop, the electrical potential between the ends of the loop is linearly related to the size of the area irrespective of its shape. The principle of measurement, construction of transmitter coil assembly, and simple but accurate direct calibration are also described.

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An in vivo area meter for real-time measurement of cross-sectional area in the cardiovascular system

Tamiya¹,

Higashidate²,

Beppu³

1991

Clin. Phys. Physiol. Meas.

View full text Add to dashboard Cite

show abstract

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In Vitro Analysis of Performance of Porcine Xenografts with Inward Bending of Stent Posts: Real-time Measurement of Valve Orifice Area Using an Area Meter

Cited by 1 publication

References 6 publications

An in vivo area meter for real-time measurement of cross-sectional area in the cardiovascular system

An in vivo area meter for real-time measurement of cross-sectional area in the cardiovascular system

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