Tantalum radiography of the respiratory tract in dogs.
ALTHOUGH radiography of the respiratory tract was suggested by Chevalier Jackson in 1918 1 the full potential of this diagnostic aid has never been realized. The major drawbacks of the three radiopaque materials thus far employed in radiography of the airway 1-4 have been that:
Contrast examination of the larynx and pharynx.
The radiologist is often frustrated in attempting to record on film his fluoroscopic observations of the pharynx. The rapidity of passage of contrast substances causes great difficulty in recording changes of even a gross degree, much less those too fine to be seen fluoroscopically. The technics utilizing the contrast of intraluminal air and the soft tissues of the region are often inadequate for the demonstration of minor alterations. The persistence of contrast substance within the pharynx and larynx of those patients anesthetized for bronchography suggested to us the use of anesthesia and a contrast material for the examination of these structures. We have accordingly utilized topical anesthesia and contrast media for study of the normal and abnormal anatomy and physiology of the larynx and pharynx. History Jackson was apparently the first to report the use of contrast substances within the bronchial tree, describing insufflation with bismuth in 1918 (17). He also employed Lipiodol as a contrast substa...
A SPECIAL SYRINGE FOR DISPLACEMENT IRRIGATION OF THE NASAL SINUSES
A short time ago, I 1 described in this journal a new method for the introduction of fluids into the nasal accessory sinuses, which I termed "displacement irrigation." It consists, briefly, in inverting the head; introducing fluid into the upturned nose, and causing it to enter the sinuses by exhausting air from them and allowing the fluid to replace it. Various solutions have been employed for their cleansing and therapeutic effects, and iodized oils have been introduced for roentgen-ray examination. The apparatus that was used in the beginning consisted of a 5 cc. glass plunger syringe for introducing the fluid, and an electric suction pump to produce the vaccuum. This arrangement proved somewhat cumbersome, especially in the roentgen-ray laboratory, and necessitated a trip to the roentgenologist with the patient in order to introduce the oil at the proper moment. Displacement syringe In order to simplify the procedure