In the first report we have published our experiments on the ability of the blood and liverchyrus of rabbits to destroy morphine, using a method of keeping the drug and tissue for a certain definite time in an ice-room or in the room of bodytemperature. In that article we described that the blood of the normal and tolerant rabbit has no capacity of destroying morphine, and as for the liverchyrus of the normal rabbit, the ability for decompositing morphine exsists a priori in itself, and further increases in the habituated animals. In this paper we will describe about the results, using the perfusion-method, which is considered as more physiologic than the liverchyrus-method, in order to assure the results obtained in the previous experiment and in case of increase, to know the relationship between the power of decomposition and the continuation of tolerance. Perfusion was undertaken by using the
Skramlick's perfusion apparatus modified by Iwase, and after the examination, the morphine remaining in the liver and that in the perfused fluid were determined in the manner described before. The results obtained are as follows. 1) The morphine hydrochloride estimated in the blood, at the end of the examination, which was perfused without connection with the liver, and beforehand added with 0, 5 mg/dl of the drug, on an average, for 30 minutes, was 92, 34 ro, for 60 minutes 92, 6 %, and for 120 minutes 92, 16 %, while 94, 86 % was extracted in the non-perfused fluid. 2) The morphine hydrochloride recovered in the liver and the perfused fluid (defibrinated blood of the animal, doubly diluted up to 60 cc with
Ringer's solution), to which 300 mg of the drug had been given, is calculated at 77, 56 % after perfusion throughout the liver for 30 minutes, for 60 minutes 72, 76 % and for 120 minutes 70, 02 %. 3) The percentages recovered in the blood of 5 morphinist rabbits at the end of perfusion conducted without connection with the liver, to which previously 0, 5 g/dl of morphine hydrochloride had been added, for 30 minutes was on the average 92, 54 %, for 60 minutes 92, 0 % and for 120 minutes 92, 1 %, while 94, 40 % of the drug could be extracted from the non-perfused fluid. 4) The morphine hydrochloride detracted from the liver and the perfused fluid in which 300 mg of the drug had been put, after perfusion throughout the liver for 120 minutes, was calculated at 65, 92 % on a par by 4 week-poisoned groups, 58, 02 % on an average by 8 week-groups, 53, 98 % on the average by 12 week-groups, 53, 69 % on an average by 16 week-groups, 53, 21 % on the average by 20 week-groups and 54, 40 % on a par by 28 week-groups. 5) The results of the experiments conclude that, the blood of the normal rabbit has no, and that of the morphinist has also scarcely any capacity for destroying morphine, and the ability of decompositing morphine exsists a priori in the liver of the normal rabbit and it further increases more in habituated animals and appears to be strengthened by continuation of tolerance to a constant. [
Cf. original (Japanese) p. 108.]
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