The twenty-four hour pneumoencephalogram: With particular reference to ventricular size a series of 150 patients and a review of the literature

Of UFOs and other thoughts

“…63 In this study, two patients with cavum septum pellucidum were noted, and more importantly the size and structure of the cavum varied from day to day. About one third of patients undergoing pneumoencephalography were noted to have "bulges" in the septum pellucidum toward the ventricles between examinations including one patient in whom this change was noted over five minutes.…”

Effects of general anaesthesia on size of cerebrospinal fluid spaces during and after pneumoencephalography.

“…Bohn's findings that the effects on ventricular filling could be 1040 Effects of general anaesthesia on size of cerebrospinal fluid spaces lessened by an intravenous infusion of hypertonic dextrose suggested that they were due at least in part to brain swelling. Logical explanations for the highly significant difference in post-encephalographic changes in ventricular size observed between the present study and that of Moseley and Sondheimer (1975) must include consideration of the following possibilities.…”

“…The procedure was otherwise identical to that described by Moseley and Sondheimer (1975), except that in most of the earlier examinations the somersaulting chair had not been available.…”

“…There were 79 patients who fell into the five diagnostic categories defined by Moseley and Sondheimer (1975); their distribution is shown in Table 1. Table 2 shows the changes in LeMay index (A%LMI) at 24 hours.…”

“…However, both hyperventilation and inhalation of nitrous oxide may cause apparent increase in size of the cerebral sulci. Moseley and Sondheimer (1975) analysed the changes in size of the lateral ventricles seen after pneumoencephalography in 150 patients, of whom the large majority (142) were examined using local anaesthesia. Nitrous oxide was used as the anaesthetic agent in two of the remaining cases.…”