Reber, A. and Bein, T. and Hoegman, M. and Khan, Z. P. and Nilsson, S. and Hedenstierna, G. (1998) Lung aeration and pulmonary gas exchange during lumbar epidural anaesthesia and in the lithotomy position in elderly patients. ANAESTHESIA, 53 (9). pp. 854-861. ISSN 0003-2409, 1365-2044
Full text not available from this repository.Abstract
We investigated a total of 36 subjects with a mean (SD) age of 65 (13) years, during baseline conditions (supine, before any anaesthesia), and then during one of the following protocols: (1) lithotomy positioning (n = 12), (2) epidural anaesthesia (n = 12), (3) general anaesthesia in the supine position (n = 12). Lung aeration, ventilation/perfusion matching, gas exchange and functional residual capacity were measured. Lung aeration was normal during baseline assessment with almost no regions with poor aeration and no substantial dependent densities. Shunt and perfusion of poorly ventilated regions were minor. Lithotomy positioning did not reduce functional residual capacity and did not affect aeration of the lung or ventilation/perfusion matching. Epidural anaesthesia, in general, had no effect on aeration, ventilation/perfusion matching or gas exchange, regardless of whether the patient was in the supine or lithotomy position. General anaesthesia, however, caused significant increases in poorly aerated lung regions and in dependent densities (interpreted as atelectasis). In conclusion, no or little impairment of lung aeration and ventilation/perfusion matching was caused by the lithotomy position and/or epidural anaesthesia, contrary to the effects seen during general anaesthesia. However, our findings also suggest that being overweight is a factor that may cause impairment of lung aeration.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | VENTILATION-PERFUSION RELATIONSHIPS; GENERAL-ANESTHESIA; ATELECTASIS; AGE; MECHANICS; DENSITIES; anaesthetic techniques, regional, epidural; position, lithotomy, effects, ventilatory |
| Subjects: | 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Anästhesiologie |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 25 Apr 2023 06:59 |
| Last Modified: | 25 Apr 2023 06:59 |
| URI: | https://pred.uni-regensburg.de/id/eprint/49512 |
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