Patent ID: 7814906
Filing Date: 2010-10-19
Classification: A61M

Abstract:
1. A method, for flow-synchronized neonatal assisted ventilation, wherein F(t) is a signal proportional to the ventilation flow, comprising the following steps: (a) activating an electrovalve for inspiration, for a time length Ti, during which air is introduced at an inspiration pressure; (b) deactivating the electrovalve for expiration, for a time length Te, during which the introduction of air is interrupted; and (c) returning to step (a); (b1) a waiting step having a non-zero time length γ before activation of computation of leakages in a ventilation circuit configured for a newborn; and (b2) a step of computation of the leakages, having a time length δ, so that γ+δ=Te, wherein when a normalized signal F′(t), obtained by processing said detected signal F(t) according to a normalizing algorithm, exceeds an expiration flow rate threshold Ftr, a spontaneous respiration activity is determined and the step (a) is reactivated, wherein said algorithm provides the following sub-steps: wherein said variable average M(t) is calculated according to the following formula: wherein i is the index numbering F(t) samples; N is the number of samples used for calculation of leakages (b2), and, wherein calculation of average is carried out for each sample acquired during step (b2), inserting each time the new value acquired.