D.H.T. Scott, G.B. Drummond British Journal of Anaesthesia

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Presentation transcript:

III. Tidal volume measurement: OK for science, but too difficult for a workstation standard? D.H.T. Scott, G.B. Drummond British Journal of Anaesthesia Volume 110, Issue 6, Pages 891-895 (June 2013) DOI: 10.1093/bja/aet162 Copyright © 2013 The Author(s) Terms and Conditions

Fig 1 A circle breathing system where the fresh gas inflow is not ‘decoupled' from the patient connection. (a) During expiration fresh gas flow passes towards the spill valve, displacing mixed exhaled gas. In this configuration, the container for the absorbent acts as a reservoir to accommodate the fresh gas and mixed exhaled gas is vented preferentially. (b) During inspiration, the spill valve is closed: fresh gas inflow contributes to flow into the patient. British Journal of Anaesthesia 2013 110, 891-895DOI: (10.1093/bja/aet162) Copyright © 2013 The Author(s) Terms and Conditions

Fig 2 A typical cardiopulmonary bypass procedure with associated electrical equipment. (a) Pendants: with electrical supply and signal cables. (b) Theatre lights. (c) Electrical pendant hoist. (d) Cerebral Function Analysing Monitor. (e) Physiological monitor. (f) Electrically powered anaesthetic workstation. (g) Transit time flowmeter. (h) Pacemaker. (i) Infusion pumps. (j) Electrically powered operating table. Anaesthetist with (k) pager, using a (l) mobile phone. (m) Trans-oesophageal echocardiogram. Present, but not seen in this photograph: (n) surgical diathermy machine. (o) Cardiopulmonary bypass machine. British Journal of Anaesthesia 2013 110, 891-895DOI: (10.1093/bja/aet162) Copyright © 2013 The Author(s) Terms and Conditions