7 Therefore, it is considered as a more descriptive than a quantitative instrument in pulmonary assessment. Nevertheless, it presents some drawbacks since the interpretation of the information obtained is subjective and of scarce consistency. Two centuries have passed since René Théophile Hyacinthe Laënnec (1781-1826) invented the stethoscope, 6 which became an element of immediate availability and diagnostic support. It is important to note that auscultation should be understood as a complement to more accurate diagnostic methods. The physician can assess whether the ventilation support is suitable for the demand of the patient through the verification of indirect signs, such as sweating, tachycardia, and hypertension (adrenergic response). Once the endotracheal intubation is performed and the patient is connected to the ventilator, chest expansion, pulmonary auscultation, and peripheral tissue perfusion must be evaluated. Volumetric capnography: dead space calculationĪs in any medical act, the adequate inspection of the patient in MV is significant.Partial pressure of oxygen in arterial blood.Equation of motion of the respiratory system.Mechanical properties of the respiratory system.Fundamentals of mechanical ventilation monitoring.
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