Patent ID: 6076005
Filing Date: 2000-06-13
Classification: A61B,A61N,H05H

Abstract:
A method for gating therapeutic or diagnostic energy to a tissue volume of a medical patient during a selected portion of the patient's respiratory cycle, to thereby diminish inaccuracies in the assumed spatial position of the tissue volume arising from displacements induced by the patient's respiration; said method comprising:monitoring the gases flowing to and from the patient's lungs to provide quasi-continuous measurements as a function of time, of (a) flow rate, (b) pressure, (c) patient lung volume and (d) carbon dioxide concentration;utilizing the said measurements to trigger the time period during which the said energy is gated on, at the beginning of the selected portion of the respiration cycle; andterminating the time period during which the said energy is gated on, at the end of the selected portion of the respiration cycle.