US 11,833,297 B2
Methods and systems for adaptive base flow and leak compensation
Mehdi M. Jafari, Laguna Hills, CA (US); Milenko Masic, Carlsbad, CA (US); Rhomere S. Jimenez, Chula Vista, CA (US); Jeffrey K Aviano, Escondido, CA (US); and Edward R. McCoy, Vista, CA (US)
Assigned to Covidien LP, Mansfield, MA (US)
Filed by Covidien LP, Mansfield, MA (US)
Filed on Jun. 2, 2020, as Appl. No. 16/890,341.
Application 16/890,341 is a continuation of application No. 15/358,519, filed on Nov. 22, 2016, granted, now 10,709,854.
Application 15/358,519 is a continuation of application No. 13/341,957, filed on Dec. 31, 2011, granted, now 9,498,589, issued on Nov. 22, 2016.
Prior Publication US 2020/0297950 A1, Sep. 24, 2020
This patent is subject to a terminal disclaimer.
Int. Cl. A61M 16/00 (2006.01); A61M 16/08 (2006.01)
CPC A61M 16/0003 (2014.02) [A61M 16/026 (2017.08); A61M 16/0875 (2013.01); A61M 16/0063 (2014.02); A61M 16/0833 (2014.02); A61M 2016/0018 (2013.01); A61M 2016/0021 (2013.01); A61M 2016/0027 (2013.01); A61M 2016/0033 (2013.01); A61M 2016/0036 (2013.01); A61M 2016/0039 (2013.01); A61M 2016/0042 (2013.01); A61M 2205/15 (2013.01); A61M 2205/505 (2013.01); A61M 2205/583 (2013.01); A61M 2230/40 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for ventilating a patient with a ventilator during an exhalation of the patient, the method comprising:
delivering a base flow as an initial base flow to the patient during a first portion of the exhalation, the initial base flow based on an estimated leak flow;
determining a change in the estimated leak flow;
based on the change in the estimated leak flow, during the first portion of the exhalation, progressively adjusting the base flow, according to a first exponential trajectory, from the initial base flow to an adjusted base flow and progressively adjusting an inspiratory trigger threshold from an initial inspiratory trigger threshold to an adjusted inspiratory trigger threshold;
identifying a transition condition to transition to a second portion of the exhalation associated with a desired base flow and a desired trigger threshold;
based on the desired base flow, during the second portion of the exhalation, changing the base flow from the adjusted base flow toward the desired base flow; and
based on the desired trigger threshold, during the second portion of the exhalation, changing the inspiratory trigger threshold from the adjusted inspiratory trigger threshold toward the desired trigger threshold.