Charcoal as an airway isoflurane reflection filter
(1998) In European Journal of Anaesthesiology 15(2). p.230-233- Abstract
- The isoflurane-saving and CO2-retaining effects of a charcoal filter were compared with a Siemens standard heat and moisture (HME) exchanger and an emptied specimen (dummy). Isoflurane was delivered during the inspiratory phase and consumption investigated at 10, 15 and 25 cycles min-1. The investigation was performed by ventilation with humidified air with a constant end-tidal CO2 and temperature. For a comparison, isoflurane was delivered in a conventional manner via the ventilator. The arrangement with a charcoal filter reduced the isoflurane consumption by a factor of 2.0-2.6, depending on ventilatory rate. Most of the saving was a result of the method of isoflurane delivery (factor 1.4-2.0), while adding the reflector gave a further... (More)
- The isoflurane-saving and CO2-retaining effects of a charcoal filter were compared with a Siemens standard heat and moisture (HME) exchanger and an emptied specimen (dummy). Isoflurane was delivered during the inspiratory phase and consumption investigated at 10, 15 and 25 cycles min-1. The investigation was performed by ventilation with humidified air with a constant end-tidal CO2 and temperature. For a comparison, isoflurane was delivered in a conventional manner via the ventilator. The arrangement with a charcoal filter reduced the isoflurane consumption by a factor of 2.0-2.6, depending on ventilatory rate. Most of the saving was a result of the method of isoflurane delivery (factor 1.4-2.0), while adding the reflector gave a further reduction (factor 1.3-1.5). One circumstance that reduced the net efficiency of the charcoal filter was that it also reflected CO2; consequently, total minute ventilation had to be increased to maintain constant end-tidal CO2. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1113192
- author
- Dahm, S L ; Steptoe, P ; Luttropp, Hans-Henrik LU and Reinstrup, Peter LU
- organization
- publishing date
- 1998
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- anaesthetic, volatile, isoflurane, equipment, charcoal filter, physics, gas adsorption
- in
- European Journal of Anaesthesiology
- volume
- 15
- issue
- 2
- pages
- 230 - 233
- publisher
- European Society of Anaesthesiology
- external identifiers
-
- pmid:9587731
- scopus:0031865790
- ISSN
- 1365-2346
- DOI
- 10.1111/j.0265-0215.1998.00260.x
- language
- English
- LU publication?
- yes
- id
- d694a271-f7ae-47b3-8712-2d11e79b0482 (old id 1113192)
- date added to LUP
- 2016-04-01 12:27:11
- date last changed
- 2022-01-27 03:55:11
@article{d694a271-f7ae-47b3-8712-2d11e79b0482, abstract = {{The isoflurane-saving and CO2-retaining effects of a charcoal filter were compared with a Siemens standard heat and moisture (HME) exchanger and an emptied specimen (dummy). Isoflurane was delivered during the inspiratory phase and consumption investigated at 10, 15 and 25 cycles min-1. The investigation was performed by ventilation with humidified air with a constant end-tidal CO2 and temperature. For a comparison, isoflurane was delivered in a conventional manner via the ventilator. The arrangement with a charcoal filter reduced the isoflurane consumption by a factor of 2.0-2.6, depending on ventilatory rate. Most of the saving was a result of the method of isoflurane delivery (factor 1.4-2.0), while adding the reflector gave a further reduction (factor 1.3-1.5). One circumstance that reduced the net efficiency of the charcoal filter was that it also reflected CO2; consequently, total minute ventilation had to be increased to maintain constant end-tidal CO2.}}, author = {{Dahm, S L and Steptoe, P and Luttropp, Hans-Henrik and Reinstrup, Peter}}, issn = {{1365-2346}}, keywords = {{anaesthetic; volatile; isoflurane; equipment; charcoal filter; physics; gas adsorption}}, language = {{eng}}, number = {{2}}, pages = {{230--233}}, publisher = {{European Society of Anaesthesiology}}, series = {{European Journal of Anaesthesiology}}, title = {{Charcoal as an airway isoflurane reflection filter}}, url = {{http://dx.doi.org/10.1111/j.0265-0215.1998.00260.x}}, doi = {{10.1111/j.0265-0215.1998.00260.x}}, volume = {{15}}, year = {{1998}}, }