File:The American journal of roentgenology, radium therapy and nuclear medicine (1906) (14753708391).jpg

Identifier: americanjournroen06ameruoft (find matches)
Title: The American journal of roentgenology, radium therapy and nuclear medicine
Year: 1906 (1900s)
Authors: American Radium Society American Roentgen Ray Society
Subjects: Radiotherapy X-rays
Publisher: Springfield, Ill. C.C. Thomas
Contributing Library: Gerstein - University of Toronto
Digitizing Sponsor: University of Toronto

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en rays. The curvature of the ventricles and the perspective are brought out bystereoscopic vision, (a) third ventricle. should be placed with the face down andpartially rotated so that the ventricle to beaspirated is beneath and the needle entersat the most dependent point possible.This position permits the maximal drain-age of fluid from the opposite lateral andthe third ventricles. Aspiration througha puncture in the posterior or descendinghorn permits a fairly complete removal ofthe fluid from one \-entricle and from thatportion of the other lateral ventricle which is anterior to the foramen of Monro. Inthe aspiration of fluid from the posteriorhorn of the lateral ventricle, the patientmust lie with the face directed upwardand backward and the head rotated from30 to 40 degrees tow-ard the side of theneedle. The exchange of air for cerebrospinalfluid must be made accurately. If the airinjected is greater in volume than thefluid withdrawn, acute pressure symptoms Ventriculography 31
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Fig. 4-B. (See description under 4-A.) will result. To attain accuracy we haveused a Record syringe with a two-wayvalve attachment (Fig. i). A small amountof fluid (20 c.c.) is aspirated and an equalquantity of air injected. This is repeateduntil all the fluid has been removed. Byaspirating and injecting in small quantities,injury to the brain from negative pressureis prevented. Not knowing the size of theventricles beforehand, we have no way ofestimating the amount of air necessary tofill one ventricle. For this reason we havepreferred the removal of all the fluid thatcan be readily obtained. This has beenfound to be but little greater than the con-tents of one ventricle. Needless to say, owing to the lighterweight of air, the ventriculogram representsthe ventricle farthest from the roentgen-ray plate. To insure the best results thesagittal plane of the head should be parallelwith the plate. Valuable assistance canalso be obtained from anteroposteriorroentgen-rays. The head should th

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