Patent ID: 7981033

Claim:
A tonometric device ( 20 ) for examination of respiratory insufficiency and regional tissue perfusion failure in patients comprising: a distal end ( 22 ) for introducing into the gastrointestinal tract of the body of a patient, a section ( 24 ) introduced into the body, and a section ( 3 ) for fixing the position of the device to the patient, wherein the section to be introduced ( 24 ) comprises: a first tube ( 1 ) to which an additional tubing ( 4 ) is connected, a second tube ( 2 ) arranged substantially parallel with and fixed to the first tube ( 1 ), wherein the distal end ( 22 ) of the second tube ( 2 ) is in direct communicating connection with the first tube ( 1 ) and an entire length of each of the first tube ( 1 ) and the second tube ( 2 ) are made of a material readily permeable for gases and substantially impermeable for body fluids and other substances, and an additional tubing ( 5 ) is connected to the second tube ( 2 ), wherein the outer diameter of the first tube ( 1 ) ranges from 2 to 4 mm and its wall thickness from 0.5 to 1.0 mm, and the outer diameter of the second tube ( 2 ) ranges from 1.0 to 1.5 mm and its wall thickness from 0.3 to 0.5 mm.