title: [The value of the Planiol and Pourcelot resistance index in the common carotid artery in narrow stenosis at the origin of the internal carotid artery].
abstract: Together with others, the author notes that the common carotid resistance index defined by Planiol and Pourcelot has no significant value in assessing the degree of a possible distal stenosis affecting the internal carotid. Using two cases similar in terms of anatomical lesions (the intracranial internal carotid being considered to be healthy), the author suggests the classification of two types of tight stenosis of the origin of the internal carotid according to whether the Planiol and Pourcelot index is raised or abnormally normal or even low:--tight stenosis of the origin of the internal carotid situated on a functional carotid system, with normal index of resistance for the common carotid;--tight stenosis of the origin of the internal carotid situated on a carotid system in the process of exclusion, with high index of resistance for the common carotid. The author feels that the possibilities of adaptation of the microcirculation and possible collateral circulations may underly these findings.
mesh_terms: D000368:Aged; D002545:Brain Ischemia / Q000175:diagnosis; D002340:Carotid Artery Diseases / Q000175:diagnosis*; D002343:Carotid Artery, Internal; D003251:Constriction, Pathologic; D005260:Female; D006439:Hemodynamics; D006801:Humans; D008297:Male; D014655:Vascular Resistance
vernacular_title: Réflexion sur la valeur de l'indice de résistance de Planiol et Pourcelot en carotide primitive en cas de sténose serrée de l'origine de la carotide interne.