One of the detrimental effects of invasive mechanical ventilation (IMV) is the alteration of the patient's mucociliary system that requires ventilatory support. The consequence of poor drainage of secretions, triggers secretion retention, atelectasis, and ventilator-associated pneumonia (VAP). Respiratory physiotherapy in the intubated patient facilitates the mobilization of retained and impacted secretions in the bronchial tree, decreasing resistance, improving lung compliance, and decreasing respiratory muscle work.

The main objective of the present study is to measure the expiratory flow generated by the application of the DAA technique in the intubated patient during, after, at the end of the technique and at two hours. As secondary objectives, it is proposed to observe whether the application of the DAA maneuver in the patient with IMV improves oxygenation, produces changes in respiratory mechanics, improves air entrapment, decreases exhaled volume post DAA and analyzes the tolerance of DAA in IMV-conscious patients The study will be performed on patients admitted to the Intensive Care Unit (ICU) of the Parc Taulí University Hospital in Sabadell with IMV requirements. The intervention will consist of performing a respiratory physiotherapy session as usual in the daily clinical practice of the ICU, specifically the technique of assisted autogenous drainage, before, during and after the Better CareTM platform will be used to continuously record the physiological variables. necessary for the study.

Ventilated air blown into the bronchial shaft through the orotracheal tube (OT) causes ciliary dyskinesia by decreasing the rate of progression of secretions to the proximal pathways. The consequence of poor drainage of secretions is triggered by retention of secretions, atelectasis, and ventilator-associated pneumonia (VAP).

Humidification and heating of the air with devices added to the imv together with respiratory physiotherapy aim to prevent and / or treat respiratory complications. Respiratory physiotherapy in the intubated patient facilitates the mobilization of retained and impacted secretions in the bronchial tree, helping to decrease resistance, improve lung compliance, and decrease respiratory muscle work.

Respiratory physiotherapy consists of a variety of devices and manual techniques to improve secretion drainage, ventilatory mechanics, and gas exchange.

The lack of scientific evidence on the effect and efficacy of respiratory physiotherapy in the patient with imv makes it difficult for the physiotherapist to perform his task with certainty of the impact of the intervention on lung physiology. Published clinical guidelines recommend the application of respiratory physiotherapy techniques to critically ill patients, but the need to demonstrate their effects with well-designed, quality studies and conclusive results is emphasized.

The aim of this study is to analyze the effect of the technique developed by the Belgian physiotherapist Jean Chevaillier, called assisted autogen drainage (AAD), on the intubated patient.

AAD is defined as a secretion drainage technique where the goal is to create a sufficiently sustained, homogeneous and synchronous expiratory flow, increasing speed, and seeking an erosion effect on secretions at different levels of the bronchial tree.

In the review of the literature on respiratory physiotherapy in the area of critics and in patients with IMV, articles have been found with different techniques such as hyperinsufflation, techniques for increasing the expiratory flow such as squeezing or rib cage. compression ". These demonstrate the safety of the techniques but there is controversy over the effect of maneuvers on the drainage of secretions and ventilatory mechanics. The point of discussion in the discussion of the authors of the meta-analyzes and studies is the need for new studies evaluating the effectiveness of respiratory physiotherapy in lung mechanics.

Hypothesis Respiratory physiotherapy applied through assisted autogenous drainage increases respiratory flow in the airways and therefore may modify respiratory mechanics and promote drainage in ventilated patients.

Inclusion Criteria:

• The subjects will be all patients over the age of 18 who are admitted to the ICU of the Parc Taulí University Hospital in Sabadell with IMV requirements
• Subjects with hemodynamic stability; Higher mean blood pressure (PAM) 65 mmg, Heart rate (HR) less than 110 bpm and Oxygen saturation (SpO2) greater than 90% with or without norepinephrine <0.5 mcg / Kg / min.

Exclusion Criteria:

• patients with platelet pressures (Pm) greater than 30 cmH2O and / or expiratory pressure at the end of expiration (PEEP) ≥ 10cmH2O
• patients who carriers of thoracic drainage
• patients with costal and / or sternal fractures
• pneumothorax
• pregnant women
• Obesity (BMI> 35)
• agitated patients with RASS greater than or equal to 3
• patients with intracranial pressures greater than 20 cmH2O
• dying.

The subjects will be all patients over the age of 18 who are admitted to the ICU of the Parc Taulí University Hospital in Sabadell with IMV requirements