Biomedical subjects
Y Quenneville
Publications and source records attributed to Y Quenneville.
[Thermographic methods and dental diseases].
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[Thermoffgraphy of teeth].
In order to study the behaviour of materials when inserted into the oral cavity, experimental models must be arranged and a knowledge of the intra-oral thermal distribution and the thermal exchanges is necessary. The temperature distribution at the surface of teeth was studied by two thermographic methods: the infrared method and the liquid crystals method. Some results were presented as well as the advantages and disadvantages of each of these methods.
Thermography and vasomotor test.
Vasomotor tests have a great diagnostic interest in many dermatologic diseases. Histamine dihydrochloride and acetylcholine chloride in intradermal injections, a rubefacient derived from nicotinic acid in epicutaneous application, and the dermograph are commonly used and studied here. There remain many unknown and controversial factors in the interpretation of the mechanisms of the drugs used for these tests. A thermographic approach using infrared thermography and the most recent technique with liquid crystals in sheet provide a new contribution to studies on vasomotor tests; these methods have contributed to the study of the vasomotor reactions observed in different dermatological affections, in particular atopic eczema, and have introduced new data in the controversy which subsists about interpretations of 'delayed cholinergic blanch'.
[Comparative informative value of telethermography (infrared) and contact thermography (liquid crystals) in the study of the breast].
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[Possibilities and limitations of cholesteric plates in breast examinations].
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[Physiopathology of acetylcholine delayed blanch in atopics. thermographic study (author's transl)].
Controversy subsists about interpretations of "delayed cholinergic blanch" in atopic dermatitis. A physical approach of this vasomotor phenomenon using infrared and cholesteric thermography and direct recording of skin temperature shows that the delayed blanch is hyperthermic and cannot be the effect of a paradoxal cholinergic vasoconstriction. In the light of the beta-adrenergic blockade theory of Szentivanyi a new physiopathological interpretation is proposed.
[Physiopathology of acetylcholine delayed blanch in atopics. Thermographic study (author's transl)].
Controversy subsists about interpretations of "delayed cholinergic blanch" in atopic dermatitis. A physical approach of this vasomotor phenomenon using infrared and cholesteric thermography and direct recording of skin temperature shows that the delayed blanch is hyperthermic and cannot be the effect of a paradoxal cholinergic vasoconstriction. In the light of the beta-adrenergic blockade theory of Szentivanyi a new physiopathological interpretation is proposed.