. The American journal of roentgenology, radium therapy and nuclear medicine . her fat, small individual. of the patients respiration simply by say-ing, instruct the patient to hold his breathduring the exposure. If the doing were aseasy as the saying, it would need no furthercomment, but it is not. Many patients find itc[uite difficult to stop breathing entirely, evenfor five or six seconds. Many think that theyare holding their breath when they are a mirror on the abdomen of such a Technique of Roentgen Examination of Kidneys 119 patient, and while he is trying to hold hisbreath th
. The American journal of roentgenology, radium therapy and nuclear medicine . her fat, small individual. of the patients respiration simply by say-ing, instruct the patient to hold his breathduring the exposure. If the doing were aseasy as the saying, it would need no furthercomment, but it is not. Many patients find itc[uite difficult to stop breathing entirely, evenfor five or six seconds. Many think that theyare holding their breath when they are a mirror on the abdomen of such a Technique of Roentgen Examination of Kidneys 119 patient, and while he is trying to hold hisbreath the reflection from the mirror willcontinue to sweep back and forth upon theceiling. Such patients need instruction inholding the breath and close watching duringthe exposure. The kidneys move more than we realize during respiration. This movement is fromone-half to one and a half inches. A move-ment of only one-quarter inch will convertthe shadow of a round stone into a long one,cause us to miss a small stone entirelv, andcompletely obliterate any well-defined Fig. 5. Kidney Outline, with Stone in Lower Poll. Catheter in situ. Note the Sharpness ofTHE Catheter Shadow, Indicating Complete Respiratory Control. SUBPHRENIC PNEUMOPERITONEUM* Produced by Ixtra-uterixe Ixsufflatiox of Oxygen as a Test of Patency of theFallopian Tubes in Sterility and in Allied Gynecological Conditions By I. C. RUBIN, ^, NEW YORK CITY I HE production of pneiimoperitoneuni-■- by the method of insufflating theuterus \Yith oxygen is intended to serYe thespecific purpose of testing the patency ofFallopian tubes. When the tubes are patentthe gas passes into the peritoneal caYity, es-tablishing an artificial is detected by fluoroscopic examina-tion. When occluded, the gas fails to reachthe peritoneal caYity. In this failure to es-tablish a pneumoperitoneum 1)y the uterineroute is furnished a fact of diagnostic Yalueimportant particularly in the problem of t
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