Clinical Trial: Lung Ultrasound for the Detection of Pulmonary Atelectasis in the Perioperative Period

Study Status: Recruiting
Recruit Status: Recruiting
Study Type: Observational

Official Title: Lung Ultrasound for the Detection of Pulmonary Atelectasis in the Perioperative Period

Brief Summary: Atelectases (collapsed lung areas) of 15-20% of total lung occur in up to 90% of patients who are anaesthetized and intubated. The goal of the present prospective study is to detect atelectatic areas in the perioperative period in the lungs of patients undergoing elective laparoscopic surgery non-invasively and without x-ray exposure. Results of lung ultrasound (LUS) as the experimental method will be compared to the results of Electrical Impedance Tomography (EIT) as the reference technique for the detection of atelectasis. A device for peripheral Oxygen saturation measurement (MASIMO Radical-8) will detect changes in ventilation. The investigators want to confirm or disprove former findings of the appearance of intraoperative atelectases and to prove that ultrasound is a valid tool for detection of atelectases.

Detailed Summary:
Sponsor: Medical University of Vienna

Current Primary Outcome: Correlation between evidence of atelectasis in lung ultrasound and evidence of atelectasis in electric impedance tomography [ Time Frame: on the day of laparoscopic surgery, expected average 2 hours in total ]

Measurements, requiring 5 minutes each, are performed before induction of anaesthesia, after intubation, immediately before extubation and immediately after extubation. Outcome measure: comparison of how often atelectases are detected by lung ultrasound (experimental method) versus by electric impedance tomography (standard method)


Original Primary Outcome: Same as current

Current Secondary Outcome: respiratory variability of oxygen saturation [ Time Frame: on the day of laparoscopic surgery, expected average 2 hours in total ]

from induction of anaesthesia until extubation


Original Secondary Outcome: Same as current

Information By: Medical University of Vienna

Dates:
Date Received: April 2, 2014
Date Started: January 2012
Date Completion:
Last Updated: March 15, 2016
Last Verified: March 2016