在进行实验教学仪器改革中,我们改进了离体蛙心脏恒压灌流实验装置,由长沙市四无线电厂试产,经用于生理实验教学,效果较好,现报道如下。 一、实验装置如图1所示,A为贮液瓶,容积500毫升,内盛任氏液。B为灌流瓶,刻度0～25厘米,灌流瓶液面高低决定灌流压大小,反映前负荷。灌流瓶通过橡皮管与贮液瓶相连,贮液瓶可在支柱上升降以控 In the reform of experimental teaching equipment, we have improved the constant pressure perfusion experimental device of the isolated frog heart, which was produced by the Changsha Radio Factory and used for physiological experiment teaching. The results are good and are reported below. First, the experimental device shown in Figure 1, A is a liquid bottle, volume 500 ml, Sheng Sheng Ren liquid. B is a perfusion bottle with a scale of 0-25 cm. The level of the perfusion bottle determines the perfusion pressure and reflects the preload. The perfusion bottle is connected to the reservoir via a rubber tube, and the reservoir can be lifted up and down on the pillar to control