Volumetric and reflective device dead space of anaesthetic reflectors under different conditions.
Inhalation sedation is increasingly performed in intensive care units. For this purpose, two anaesthetic reflectors, AnaConDa™ and Mirus™ are commercially available. However, their internal volume (100 ml) and possible carbon dioxide reflection raised concerns. Therefore, we compared carbon dioxide...
| Publicado en: | Journal of Clinical Monitoring & Computing Vol. 32; no. 6; pp. 1073 - 1081 |
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| Autores principales: | , , , , |
| Formato: | research Journal Article |
| Publicado: |
Springer Nature
Dec2018
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=132699956&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 132699956 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 13871307 OHC jtl: Journal of Clinical Monitoring & Computing issn: 13871307 maglogo: N pubinfo: dt: Dec2018 vid: 32 iid: 6 pid: 237 pub: Springer Nature place: New York, New York artinfo: ui: 132699956 132699956 NLM29374847 132699956 10.1007/s10877-018-0105-8 NLM29374847 132699956 ppf: 1073 ppct: 8 formats: fmt: – @attributes: type: T – @attributes: type: P tig: atl: Volumetric and reflective device dead space of anaesthetic reflectors under different conditions. aug: au: Bomberg, Hagen Veddeler, Max Volk, Thomas Groesdonk, Heinrich V. Meiser, Andreas affil: Department of Anaesthesiology, Intensive Care Medicine and Pain Medicine, Saarland University Medical Centre, University of Saarland, Kirrbergerstrasse 1, 66421, Homburg, Saarland, Germany sug: subj: Respiratory Dead Space Physiology Anesthesia, Inhalation Equipment and Supplies Tidal Volume Anesthesia, Inhalation Statistics and Numerical Data Respiration, Artificial Statistics and Numerical Data Respiration, Artificial Equipment and Supplies Intensive Care Units Carbon Dioxide Metabolism Anesthetics, Inhalation Administration and Dosage Lung Metabolism Models, Biological Human Monitoring, Physiologic Statistics and Numerical Data Isoflurane Administration and Dosage Validation Studies Comparative Studies Evaluation Research Multicenter Studies Clinical Assessment Tools ab: Inhalation sedation is increasingly performed in intensive care units. For this purpose, two anaesthetic reflectors, AnaConDa™ and Mirus™ are commercially available. However, their internal volume (100 ml) and possible carbon dioxide reflection raised concerns. Therefore, we compared carbon dioxide elimination of both with a heat moisture exchanger (HME, 35 ml) in a test lung model. A constant flow of carbon dioxide was insufflated into the test lung, ventilated with 500 ml, 10 breaths per minute. HME, MIRUS and AnaConDa were connected successively. Inspired (insp-CO2) and end-tidal carbon dioxide concentrations (et-CO2) were measured under four conditions: ambient temperature pressure (ATP), body temperature pressure saturated (BTPS), BTPS with 0.4 Vol% (ISO-0.4), and 1.2 Vol% isoflurane (ISO-1.2). Tidal volume increase to maintain normocapnia was also determined. Insp-CO2 was higher with AnaConDa compared to MIRUS and higher under ATP compared to BTPS. Isoflurane further decreased insp-CO2 and abolished the difference between AnaConDa and MIRUS. Et-CO2 showed similar effects. In addition to volumetric dead space, reflective dead space was determined as 198 ± 6/58 ± 6/35 ± 0/25 ± 0 ml under ATP/BTPS/ISO-0.4/ISO-1.2 conditions for AnaConDa, and 92 ± 6/25 ± 0/25 ± 0/25 ± 0 ml under the same conditions for MIRUS, respectively. Under BTPS conditions and with the use of moderate inhaled agent concentrations, reflective dead space is small and similar between the two devices. pubtype: Academic Journal doctype: research Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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