抄録
The modification of the measuring system in small animal isolated papillary muscle. (II)Nishiura,Naoki ; Mori Hidezo. (Nat. Cardio-vascular Ctr. Res. Inst. Department of the Cardiac Physiology Osaka Japan)Last year, we presented the modified traditional measuring system that was employed the pen motor galvanometer to control the force and length of small animal isolated papillary muscles. This year, to reduce the noise and improved the sensitivity, we could employed the speaker (FOSTEX FF125K) instead of the pen-motor. This new modified system configuration is almost same as previous system. However, the substance of the circuit and tools are developed for stable operation or easy treatments. The arm that hold the papillary muscle consists of 2 arms that have been attached the speaker and load cell. Position sensor attached to the arm on the side of the speaker. This sensor is magnetic operation device. The temperature control, one thermo-regulated apparatus (Coolnics circulator CTE22A) control the both tyrode liquid and chamber. Papillary muscle arranged between 2 arms was set in the chamber. At the bottom of this chamber, making the window that attached the cover glass to observe a papillary muscle under the microscope during the experiment. Therefore we could fabricated the new modified apparatus to measure the force and length of small animal papillary muscles. [J Physiol Sci. 2007;57 Suppl:S243]
