Fascinating teshuvah by Rabbi Chaim Ozer Grodzinski to a shailah posed by a Jewish doctor regarding whether it is permissible to intravenously feed a patient on Yom Kippur. This teshuvah is one of the earliest known responses to this shailah, and all poskim who followed Rabbi Chaim Ozer and dealt with this question referenced the present teshuvah. Practically, the prevalent halachic ruling is to avoid feeding a patient intravenously unless its necessary for his health.