device for the perfusion of isolated heart dilate coronary vessels

摘要

The appts. has a feed channel (16b, 16c) interrupted by a closed vessel (31) partially filled with fluid and partially with gas. The gas vol. is adjustable in the vessel (31). Pref. the vessel (31) has a passage drilling (38) near the liq. filler, with a closure held against its outlet at a defined pressure so that, when the pressure is exceeded, liq. can move out of the vessel (31). Fluid moving out of the vessel (31) passes through a return channel (45) back to the reservoir. The drilling (38) outlet is covered by an elastic membrane against a chamber with a defined inner pressure, and the edges of the membrane are sealed against a plate with a second drilling (38) to the other (39) within the membrane cover and out to the return channel (45). The chamber at the outer side of the membrane is connected (55) to a spindle injection (56) piston/cylinder (58,57) system to set the chamber pressure. A manometer (61) shows the chamber pressure at the rubber membrane. The plate for the drillings (38,39) is identical to a vessel (31) wall. USE/ADVANTAGE - The appts. is for the perfusion of a heart, to keep it working, such as before transplanation. The assembly gives an adjustable timed operation of the aorta pressure.