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Determination of serum propofol concentrations by breath analysis using ion mobility spectrometry
- Source :
- British Journal of Anaesthesia. 103:822-827
- Publication Year :
- 2009
- Publisher :
- Elsevier BV, 2009.
-
Abstract
- Background We aimed to measure propofol concentrations in exhaled air with an ion mobility spectrometer coupled to a multicapillary column for pre-separation (MCC–IMS). In addition, we aimed to compare the values of these measurements with serum propofol concentrations, as determined by gas chromatography–mass spectrometry (GC–MS). Methods Thirteen patients, ASA I or II, undergoing elective ENT surgery were studied. Anaesthesia was induced with propofol 2.1 (0.7) mg kg−1, rocuronium 0.5 (0.1) mg kg−1, and remifentanil 0.5 µg kg−1 min−1. After tracheal intubation, anaesthesia was maintained with a continuous infusion of propofol 3.9 (1.8) mg kg−1 h−1 and remifentanil 0.5 µg kg−1 min−1. Simultaneously, a venous blood sample was obtained. Propofol concentrations in serum were determined by GC–MS and compared with the height of the respective propofol signals achieved by MCC–IMS. Results Twenty-four pairs of samples were obtained. The comparison of propofol concentrations in exhaled air and serum presented a bias of −10.5% and a precision of ± 12.3%. With these values, the 95% limits of agreement were 14.1% and −35.1%. Conclusions MCC–IMS may be a suitable method to determine propofol concentrations in exhaled air, and may be used to predict propofol concentrations in serum.
- Subjects :
- Adult
Male
Adolescent
Ion-mobility spectrometry
medicine.medical_treatment
Remifentanil
010402 general chemistry
01 natural sciences
Gas Chromatography-Mass Spectrometry
Mass Spectrometry
Young Adult
Monitoring, Intraoperative
Humans
Medicine
Rocuronium
Propofol
Aged
business.industry
010401 analytical chemistry
Tracheal intubation
Reproducibility of Results
Middle Aged
Exhaled air
Otorhinolaryngologic Surgical Procedures
0104 chemical sciences
Anesthesiology and Pain Medicine
Breath Tests
Breath gas analysis
Anesthesia
Female
Gas chromatography–mass spectrometry
business
Anesthetics, Intravenous
medicine.drug
Subjects
Details
- ISSN :
- 00070912
- Volume :
- 103
- Database :
- OpenAIRE
- Journal :
- British Journal of Anaesthesia
- Accession number :
- edsair.doi.dedup.....483aa1d4e4262d41d48b2fef3a716dd6