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 Preference for Forgetting: Some Reflections on Publishing Looking For Blackfellas' Point: An Australian History of Place
Blackfellas' Point lies on the Towamba River in south-eastern New South Wales. As the river descends rapidly from its source on the Monaro plains, it winds its way through state forest, national park and farming land. Around twenty-five kilometres before it reaches the sea, just south of Eden, it passes through Towamba, the small village in which Mark McKenna now owns eight acres of land. Mark's land looks across the river to 'Blackfellas' Point', once an Aboriginal camping ground and meeting place. Looking for Blackfellas' Point is a history that begins by looking across the river to the arc of bush that is 'Blackfellas' Point. From there, Mark McKenna's gaze pans out - from the history of one place he knows intimately, to the history of one region and, ultimately, to the history of Australia's quest for reconciliation between Indigenous and non-Indigenous Australians. Looking For Blackfellas' Point is a history for every Australian who is interested in the story of settler-Australia's relations with Indigenous people - what happened between us, how we learnt to forget and, finally, how we came to confront the truth about our past and build a movement for reconciliation.