US 11,744,467 B2
System and method for laser based internal analysis of gases in a body of a human
Sune Svanberg, Lund (SE); Emilie Krite Svanberg, Lund (SE); and Marcus Larsson, Bjärred (SE)
Assigned to NEOLA MEDICAL AB, Lund (SE)
Appl. No. 15/752,823
Filed by NEOLA MEDICAL AB, Lund (SE)
PCT Filed Aug. 17, 2016, PCT No. PCT/EP2016/069549
§ 371(c)(1), (2) Date Feb. 14, 2018,
PCT Pub. No. WO2017/029344, PCT Pub. Date Feb. 23, 2017.
Claims priority of application No. 1500335-3 (SE), filed on Aug. 17, 2015.
Prior Publication US 2018/0235475 A1, Aug. 23, 2018
Int. Cl. A61B 5/00 (2006.01); A61B 5/08 (2006.01); A61B 1/267 (2006.01); A61B 1/31 (2006.01); G01N 21/49 (2006.01); A61B 1/00 (2006.01); G01J 3/42 (2006.01); A61M 16/00 (2006.01); A61B 1/06 (2006.01); A61B 1/07 (2006.01); A61B 1/273 (2006.01); A61B 90/00 (2016.01)
CPC A61B 5/0084 (2013.01) [A61B 1/00013 (2013.01); A61B 1/00165 (2013.01); A61B 1/063 (2013.01); A61B 1/07 (2013.01); A61B 1/267 (2013.01); A61B 1/2676 (2013.01); A61B 1/2733 (2013.01); A61B 1/31 (2013.01); A61B 5/0059 (2013.01); A61B 5/0075 (2013.01); A61B 5/08 (2013.01); A61B 5/4839 (2013.01); A61B 5/6853 (2013.01); A61B 5/746 (2013.01); A61M 16/024 (2017.08); G01J 3/42 (2013.01); G01N 21/49 (2013.01); A61B 1/00 (2013.01); A61B 1/0661 (2013.01); A61B 2090/3618 (2016.02); A61B 2562/0238 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A system for measuring free gas in lungs of a subject based on spectroscopy, the system comprising:
an introducing member being a nasogastric feeding tube adapted to be inserted into an oesophagus of the subject;
a light source for emitting light at an absorbing wavelength of the free gas;
an optical fiber connectable to the light source is embedded into a wall of the introducing member and the introducing member is configured for positioning a light emitting end of said fiber near to bronchi while the introducing member extends into a stomach of the subject;
a plurality of detector units adapted to be positioned on a skin surface, at a chest of the subject, for detecting light at the skin surface which has been transmitted from the light emitting end through tissue and the skin surface of the subject; and
a control unit for evaluating the detected transmitted light for determining the free gas in the lungs, or a distribution of the free gas in the lungs, or a concentration of the free gas in the lungs, such that the free gas, the distribution of the free gas or the concentration of the free gas is determinable for each lung by the control unit based on an evaluation of the detected transmitted light.