investigated whether the health care professional received organ donation information during their degree formation: Yes:1, No:0.

investigated whether the health care professional attended to courses on procurement or organ donation after their degree formation: Yes:1, No:0.

investigated when health care professional consider a neurocritical patient as a potential organ donor: When the patient is in a coma: 1, When brain inactivity is corroborated with technical or instrumental means in a patient with irreversible absence of brain response with loss of consciousness, absence of spontaneous breathing, absence of cephalic reflexes and observation of fixed pupils: 2, When the patient is in a vegetative state: 3, When cardiorespiratory arrest occurs in the patient with irreversible absence of brain response with loss of consciousness, absence of spontaneous breathing, absence of cephalic reflexes and fixation of fixed pupils: 4, Other: 5

investigated whether the health care professional know the criteria the organ donor must meet to be considered an optimal lung donor. PaO2 / FiO2> 300 with FiO2 1 and PEEP 10cmH2O, without evidence of aspiration / sepsis, absence of microorganism in sputum / BAL, absence of purulent secretions in tube: 1, X-ray with minimal infiltrates, no evidence of aspiration / sepsis, no history of cardiopulmonary surgery, absence of microorganism in sputum / BAL, absence of secretions: 2, clean chest X-ray, PaO2 / FiO2> 300 with FiO2 1 and PEEP 5cmH2O, absence of thoracic trauma, without evidence of aspiration / sepsis, no history of cardiopulmonary surgery, absence of microorganism in sputum / BAL, absence of purulent secretions in tube: 3, d. Unilateral thoracic trauma, with no evidence of aspiration / sepsis, no history of cardiopulmonary surgery, absence of microorganism in sputum / BAL, absence of purulent secretions in tube: 4

investigated whether the health care professional knows where and how to express he/she consent for organ donation: Yes:1, No:0.

investigated whether the health care professional knows if the health care institution were he/she works have a potential lung donor management protocol.

investigated whether the health care professional had ever assist a neurocritical patients during this professional career.

investigated whether the health care professional had ever call to the federal organ procurement organism (INCUCAI) to report a neurocritical patients with a GCS ≤ 7.

investigated whether the health care professional had ever done an apnea test during this professional career.

investigated which type of apnea test the health care professional had done: the conventional apnea test consisting in preoxygenation and disconnection form the ventilator; or one of the alternative apnea test: by artificial increase of Co2; with CPAP or by controlled hypoventilation.

investigated whether the health care professional had ever call to the federal organ procurement organism (INCUCAI) to report a possible brain death patient.

investigated whether the health care professional had ever participated in the procurement process and maintenance (management) of a potential organ donor patient during this professional career.

investigated whether the health care professional make a change in the ventilator parameters after the brain dead diagnosis.

investigated whether the health care professional change the fraction inspired oxygen to 100% after the brain dead diagnosis, or reduced it if the potential lung donor have a PaO2/FiO2 > 300.

investigated which tidal volume (Vt) and positive end expiratory pressure (PEEP) does the health care professional use to ventilate a potential lung donor patient among different options: Vt 10-12 mL/kg, PEEP 5 cmH20:1, Vt 10-12 mL/kg, PEEP 8-10 cmH20:2, Vt 8-10 mL/kg, PEEP 5 cmH20:3, Vt 8-10 mL/kg, PEEP 8-10 cmH20:4, Vt 6-8 mL/kg, PEEP 5 cmH20:5, Vt 6-8 mL/kg, PEEP 8-10cmH20:6, Other:7

investigated whether the health care professional use any strategy to improve oxygenation in case of low oxygenation and which type of strategies does it use: change positioning:1, pulmonary expansion techniques:2, endotracheal suctioning:3, Fiberoptic bronchoscopy:4, Recruitment maneuvers: 5, PEEP titulation:6, Others:7

investigated the most commonly used type of recruitment maneuver in a potential PULMONARY donor: Sighs with increased Tidal Volume for several breaths: 1, CPAP of 40 cmH20 for 40 seconds: 2, CPAP of 30 cmH20 for 30 seconds: 3, Step increase of PEEP to 40 cmH20 and then stepwise decrease: 4, PC Mode CMV with inspiratory pressure of 25-30 cmH20 and PEEP 10-15 cmH20 for 2 hours for a single time: 5, PC-CMV mode with inspiratory pressure of 20 cmH20 and stepwise increase of PEEP to 20-30 cmH20: 6, PEEP of 18-20 cmH20 for 1 minute, then decrease PEEP and increase Tidal Volume for several breaths: 7, Other: 8.

PEEP / FiO2 Table (ARDS Network): 1, PEEP / Compliance Protocol: 2, Determination of the lower inflection point per Pressure / Volume curve: 3, Increase of the PEEP for Plateau Pressure <28 cmH20 (Express Protocol): 4, Guided by esophageal manometry: 5, Guided by pulmonary ultrasound: 6, Guided by volumetric capnography: 7, Other: 8

investigated whether the health care professional use a closed-circuit for endotracheal suctioning.

investigated whether the health care professional consider important to continue the care bundle to prevent ventilator-associated pneumonia such as: head elevation, tracheal cuff control, oral hygiene, etc.