Noninvasive monitoring of intracranial pressure

Details Noninvasive monitoring of intracranial pressure Noninvasive monitoring of intracranial pressure

A - Human Necessities

61

B

A61B 8/00 (2006.01) A61B 5/03 (2006.01) A61B 8/08 (2006.01) A61B 5/0456 (2006.01)

Patent

CA 2373200

A noninvasive method of monitoring the intracranial pressure (ICE) of a patient. At least one waveform [22] representative of a pulsation of an anatomical feature of the patient's head is obtained, preferably by integrating ultrasound reflection traces in a time gate corresponding to reflections from the feature. The preferred anatomical feature is the third cerebral ventricle. A quantitative measure of ICE is inferred from two or more diagnostic features, such as diagnostic times, associated with the waveform [22]. Alternatively, a qualitative measure of ICE is obtained from the shape of the respiratory wave imposed on the train of waveforms by the patient's breathing.

L'invention concerne une méthode permettant de surveiller de manière non invasive la pression intracrânienne d'un patient. On obtient au moins un oscillogramme représentant une pulsation d'une caractéristique anatomique de la tête du patient, de préférence en intégrant des traces de réflexion d'ultrasons dans une porte temporelle correspondant à des réflexions de ladite caractéristique. De préférence, ladite caractéristique anatomique est le troisième ventricule cérébral. On infère une mesure quantitative de la pression intracrânienne à partir d'au moins deux caractéristiques de diagnostic, telles que des heures de diagnostic, associées à l'oscillogramme. Dans une variante, on obtient une mesure qualitative de la pression intracrânienne à partir de la forme de la courbe respiratoire imposée au train d'ondes par la respiration du patient.

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