Airway Complication of Anesthesia Clinical Trial
Official title:
Factors Determining End-tidal O2 Concentration in During Pre-oxygenation
Verified date | September 2021 |
Source | Region Västmanland |
Contact | n/a |
Is FDA regulated | No |
Health authority | |
Study type | Observational [Patient Registry] |
Earlier studies has shown a correlation between older age and longer time for the rise in the end-tidal O2 concentration during pre-oxygenation. In this study the investigators aim to analyse this correlation more closely and investigate if the arterial partial pressure of oxygen (PaO2) as measured before the start of pre-oxygenation, with the patient breathing air, is a better predictor than age for estimating the time necessary for achieving the goal of pre-oxygenation.
Status | Completed |
Enrollment | 120 |
Est. completion date | September 29, 2021 |
Est. primary completion date | September 17, 2021 |
Accepts healthy volunteers | |
Gender | All |
Age group | 40 Years to 79 Years |
Eligibility | Inclusion Criteria: - Patients scheduled for general anaesthesia in American Society of Anesthesiology (ASA) physical status classification grade I-III. - Body mass index over 18.5 and less than 30 kg/m2 - Peripheral oxygen saturation 92% or more on air. Exclusion Criteria: - ASA IV. - Patients with active smoking and former smokers with a history of smoking more than 6 pack-years. - Chronic obstructive lung disease. - Bloodgas with PaO2 = 8 kilopascal (kPa) or PaCO2 = 6.5 kPa. - Continuous positive airway pressure treatment at night. - Heart failure or angina pectoris. - Hemoglobin value less than 100 g/L. - Pregnancy. - Any neuromuscular or neurologic illness reducing ventilatory capacity. - Any endocrine disease influencing basic metabolic demand. - Not possible to achieve a tight mask seal. - Patient unable to follow instructions. |
Country | Name | City | State |
---|---|---|---|
Sweden | Köping County Hospital | Köping | Västmanland |
Lead Sponsor | Collaborator |
---|---|
Region Västmanland |
Sweden,
Gambee AM, Hertzka RE, Fisher DM. Preoxygenation techniques: comparison of three minutes and four breaths. Anesth Analg. 1987 May;66(5):468-70. — View Citation
Kang H, Park HJ, Baek SK, Choi J, Park SJ. Effects of preoxygenation with the three minutes tidal volume breathing technique in the elderly. Korean J Anesthesiol. 2010 Apr;58(4):369-73. doi: 10.4097/kjae.2010.58.4.369. Epub 2010 Apr 28. — View Citation
Milic-Emili J, Torchio R, D'Angelo E. Closing volume: a reappraisal (1967-2007). Eur J Appl Physiol. 2007 Apr;99(6):567-83. Epub 2007 Jan 20. Review. — View Citation
Sum Ping SJ, Makary LF, Van Hal MD. Factors influencing oxygen store during denitrogenation in the healthy patient. J Clin Anesth. 2009 May;21(3):183-9. doi: 10.1016/j.jclinane.2008.07.004. — View Citation
Type | Measure | Description | Time frame | Safety issue |
---|---|---|---|---|
Primary | PaO2 breathing air before start of pre-oxygenation and the rise in end-tidal O2 during pre-oxygenation. | An arterial bloodgas with the patient in the supine position breathing air will be analysed with regards to PaO2 and correlated to the rise in end-tidal O2 concentration during pre-oxygenation. | 5 minutes. | |
Secondary | Age and the rise in end-tidal O2 during pre-oxygenation. | Age will be correlated to the rise in end-tidal O2 during pre-oxygenation. | 5 minutes. |
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