. Journal of radiology . ta that promises tobe very valuable in the near 1. Van Zwaluwenburg and Peterson, Pneu-moperitoneum of the Pelvis. Gynecolog-ical Studies. Amer. J. Roentgenol. VIII, 12. Jan.,1921. 2. Van Zwaluwenburg and Peterson. Ex-periences with Pneumoperitoneal X-rayas an Aid to Gynecological Med. IV, 412. July, 1921. 3. Peterson, R. X-ray After Inflation ofPelvis with Carbon Dioxide as an Aid toObstetric and Gynecological Gynec. Obst. XXXIII, 154, Aug-ust. 1921. 4. Peterson, R. Pneumoperitoneum andRoentgenology as Aids to More A
. Journal of radiology . ta that promises tobe very valuable in the near 1. Van Zwaluwenburg and Peterson, Pneu-moperitoneum of the Pelvis. Gynecolog-ical Studies. Amer. J. Roentgenol. VIII, 12. Jan.,1921. 2. Van Zwaluwenburg and Peterson. Ex-periences with Pneumoperitoneal X-rayas an Aid to Gynecological Med. IV, 412. July, 1921. 3. Peterson, R. X-ray After Inflation ofPelvis with Carbon Dioxide as an Aid toObstetric and Gynecological Gynec. Obst. XXXIII, 154, Aug-ust. 1921. 4. Peterson, R. Pneumoperitoneum andRoentgenology as Aids to More AccurateObstetrical and Gynecological DiagnosesAm. J. Obst. and Gyn. II, No. 4, Octo-ber, 1921. DISCUSSION Dr. Wm. H. Stewart, NewYorl(. The doctor has covered thesubject so well that I have little, ifanything, to add. I would like to saya few words in reference to the generaluse of pneumoperitoneum. Pneumo-peritoneoum has come to stay, irrespec-tive of the opinions of some throughoutthe country. We all know the difficul-. Fig-ure IX—Enlarged, prolapsed and adherent ovary. Theretraction is apparent on the flat Plate. The fixation to thefloor of the pelvis can be appreciated only on stereoscopicexamination. No. 39091. Figure X—Adherent retroversion and retroflexion. Notethe shadow of the lower segment reaching- forward fromthe uterine shadow and deforming the pelvic floor. Ovariesenveloped in adhesions (Retouched) No. 39063. 77 PELYCOGRAPHY ITS FIELD AND ITS LIMITATIONS— ZWALUWENBURG ties that any new method has. I thinkyou can well remember how the manwho advocated lumbar puncture wastreated for a number of years beforethe thing was really recognized for itsvalue. Pneumoperitoneum has its limits andmust not be used promiscuously. Thecardinal rule to follow is never to usepneumoperitoneum when the same in-formation can be obtained by simplermeans. If you decide to use pneumo-peritoneum, you must be as carefulabout the procedure as though it werea surgical operation, and the
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