US 12,214,120 B2
Medical device with improved desufflation
Yves Koth, Berlin (DE)
Assigned to W.O.M. World of Medicine GmbH, Berlin (DE)
Filed by W.O.M. World of Medicine GmbH, Berlin (DE)
Filed on Apr. 21, 2021, as Appl. No. 17/236,828.
Application 17/236,828 is a continuation of application No. 16/470,290, abandoned, previously published as PCT/DE2017/000428, filed on Dec. 18, 2017.
Claims priority of application No. 102016014980.9 (DE), filed on Dec. 16, 2016.
Prior Publication US 2021/0361886 A1, Nov. 25, 2021
Int. Cl. A61M 13/00 (2006.01); A61B 17/34 (2006.01)
CPC A61M 13/003 (2013.01) [A61B 17/3474 (2013.01); A61M 2202/02 (2013.01); A61M 2205/3334 (2013.01); A61M 2205/3337 (2013.01); A61M 2205/3344 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A medical device comprising:
an insufflator which includes a controller, an insufflation line, a desufflation line, and one pressure sensor and one volume flow sensor associated with each of the insufflation line and the desufflation line; the insufflation line in fluid communication with a gas source and the desufflation line in fluid communication with a suction pump;
wherein the controller controls ventilation of a gas present in a patient by adjusting an amount of suction in the desufflation line as a function of a pressure measurements obtained from the pressure sensor associated with the insufflation line and a pressure measurement obtained from the pressure sensor associated with the desufflation line,
wherein the controller activates the suction, and estimates an abdominal pressure of the patient using the pressure sensor of the desufflation line by means of a mathematical observer model and compares the estimated abdominal pressure to the pressure measurement of the pressure sensor in the insufflation line, wherein the suction remains activated only with identical values, effectively a difference smaller than 2 mmHg, between the estimated abdominal pressure and the pressure measurement of the pressure sensor in the insufflation line;
wherein the controller includes an activation blocking system that prevents the suction in the desufflation line when the pressure measurement by means of the pressure sensor associated with the insufflation line is lower than a preset threshold value, and
wherein the activation blocking system further prevents the suction in the desufflation line when the pressure measurement of the pressure sensor associated with the insufflation line and the pressure measurement of the pressure sensor associated with the desufflation line have values which are not identical.