| 摘要 |
1,190,122. Blood pressure-measuring apparatus. F. HOFFMANN-LA ROCHE & CO. A.G. 10 May, 1968 [12 May, 1967], No. 22304/ 68. Heading ASK. [Also in Division G1] An apparatus for measuring blood pressure in small animals, eg. rats, a preferred embodiment of which is shown in the Figure, comprises a pressure generator 1 connected to a pneumatic sleeve 7 and the recording head 11 of a pen recorder, and an electrical pulsegenerating pressure transducer 15 coupled via an amplifier 16 to the .pen-moving mechanism of said recording head so that the motion imparted to the pen 17 is in the same plane as, but at right angles to, the motion imparted to the recording head by said pressure generator; said pressure generator consisting of a piston 2 enclosed in a cylinder 3 (either the piston or the cylinder being displaceable), a tube 8 connecting the cylinder on the pressure side of the piston to the pneumatic sleeve and an arm 12 synchronously connecting the cylinder or piston (whichever is displaceable) via a transmission system (13, 14) to the recording head. The pulses are preferably picked up by means of a piezocrystal ring 15, which together with the pneumatic sleeve is slipped over the animal's tail. In the preferred embodiment shown in the Figure, the piston is slidably located. in the cylinder and connected to a reversible electric motor 4 by the threaded spindle 5, and the flexible tube 8 is provided with an expansion chamber 9 and monitor pressure gauge 10.
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