1. , , , et al. An estimation of the global volume of surgery: a modelling strategy based on available data. Lancet 2008; 372: 139–44.
2. , , , et al. Identification and characterisation of the high-risk surgical population in the United Kingdom. Crit Care 2006; 10: R81.
3. , , , et al. The use of a postoperative morbidity survey to evaluate patients with prolonged hospitalization after routine, moderate-risk, elective surgery. Anesth Analg 1999; 89: 514–19.
4. , . Does peroperative gut-mucosa hypoperfusion cause postoperative nausea and vomiting?Lancet 1995; 345: 1123–4.
5. , . Heart muscle; The heart as a pump and function of the heart valves. In: , ed. Textbook of Medical Physiology, 11th edn. Philadelphia: Elsevier, Inc., 2006, pp.103–15.
6. , . Overview of the circulation: medical physics of pressure, flow, and resistance. In: Elsevier S, ed. Textbook of Medical Physiology, 11th edn. Philadelphia: Elsevier, Inc., 2006, pp. 161–70.
7. , , , et al. Goal-directed intraoperative fluid administration reduces length of hospital stay after major surgery. Anesthesiology 2002; 97: 820–6.
8. , , , et al. Early goal-directed therapy after major surgery reduces complications and duration of hospital stay. A randomised, controlled trial. Crit Care 2005; 9: R687–93.
9. , , , et al. Intraoperative oesophageal Doppler guided fluid management shortens postoperative hospital stay after major bowel surgery. Br J Anaesth 2005; 95: 634–42.
10. , , , , . Goal-directed intraoperative therapy based on autocalibrated arterial pressure waveform analysis reduces hospital stay in high-risk surgical patients: a randomized, controlled trial. Crit Care 2010; 14: R18.
11. , , , et al. Relation between respiratory changes in arterial pulse pressure and fluid responsiveness in septic patients with acute circulatory failure. Am J Respir Crit Care Med 2000; 162: 134–8.
12. , , , et al. The ability of a novel algorithm for automatic estimation of the respiratory variations in arterial pulse pressure to monitor fluid responsiveness in the operating room. Anesth Analg 2008; 106: 1195–2000.
13. , , , et al. Respiratory variations in pulse oximetry plethysmographic waveform amplitude to predict fluid responsiveness in the operating room. Anesthesiology 2007; 106: 1105–11.
14. , , , et al. Pleth variability index to monitor the respiratory variations in the pulse oximeter plethysmographic waveform amplitude and predict fluid responsiveness in the operating theatre. Br J Anaesth 2008; 101: 200–6.
15. . Arterial pressure variation and goal-directed fluid therapy. J Cardiothorac Vasc Anesth 2010; 24: 487–97.
16. . Changes in arterial pressure during mechanical ventilation. Anesthesiology 2005; 103: 419–28.
17. , , . Systolic blood pressure variation is a sensitive indicator of hypovolemia in ventilated dogs subjected to graded hemorrhage. Anesthesiology 1987; 67: 498–502.
18. , , . Does central venous pressure predict fluid responsiveness?: a systematic review of the literature and the tale of seven mares. Chest 2008; 134: 172–8.
19. , . Functional hemodynamic monitoring. Crit Care 2005; 9: 566–72.
20. , , , . Dynamic changes in arterial waveform derived variables and fluid responsiveness in mechanically ventilated patients: a systematic review of the literature. Crit Care Med 2009; 37: 2642–7.
21. , . Can one predict fluid responsiveness in spontaneously breathing patients?Intensive Care Med 2007; 33: 1111–13.
22. , , , , . Pulse pressure variations to predict fluid responsiveness: influence of tidal volume. Intensive Care Med 2005; 31: 517–23.
23. , , , et al. Increased intra-abdominal pressure affects respiratory variations in arterial pressure in normovolaemice and hypovolaemic mechanically ventilated pigs. Intensive Care Med 2007; 33: 163–71.
24. , , , . Utility of the photoplethysmogram in circulatory monitoring. Anesthesiology 2008; 108: 950–8.
25. , , . The detection of peripheral venous pulsation using the pulse oximeter as a plethysmograph. J Clin Monit 1993; 9: 283–7.
26. , , . Forehead pulse oximetry: Headband use helps alleviate false low readings likely related to venous pulsation artifact. Anesthesiology 2006; 105: 1111–16.
27. , , , et al. Poor agreement between respiratory variations in pulse oximetry photoplethysmographic waveform amplitude and pulse pressure in intensive care unit patients. Anesthesiology 2008; 109: 849–55.
28. , , , , . Pulse oximetry plethysmographic waveform during changes in blood volume. Br J Anaesth 1999; 82: 178–81.
29. , , , , . Relation between respiratory variations in pulse oximetry plethysmographic waveform amplitude and arterial pulse pressure in ventilated patients. Crit Care 2005; 9: R562–8.
, , , et al
. Respiratory variations in pulse oximeter waveform amplitude are influenced by venous return in mechanically ventilated patients under general anaesthesia
. Eur J Anaesthesiol 2007
31. , , , et al. Plethysmographic dynamic indices predict fluid responsiveness in septic ventilated patients. Intensive Care Med 2007; 33: 993–9.
32. , , , , . Ventilation-induced plethysmographic variations predict fluid responsiveness in ventilated postoperative cardiac surgery patients. Anesth Analg 2007; 105: 448–52.
33. , , , et al. Arterial and plethysmographic waveform analysis in anesthetized patients with hypovolemia. Anesthesiology 2010; 113: 83–91.
34. . Can clinical monitors be used as scientific instruments?Anesth Analg 2006; 103: 1071–2.
35. , , , et al. Does the pleth variability index indicate the respiratory induced variation in the plethysmogram and arterial pressure waveforms?Anesth Analg 2008; 106: 1189–94.
36. , , , et al. Accuracy of stroke volume variation compared with pleth variability index to predict fluid responsiveness in mechanically ventilated patients undergoing major surgery. Eur J Anaesthesiol 2009; 27: 555–61.
37. , , , . Monitoring of peri-operative fluid administration by individualized goal-directed therapy. Acta Anaesthesiol Scand 2007; 51: 331–40.
38. , , , et al. Goal-directed therapy in high-risk surgical patients: a 15-year follow-up study. Intensive Care Medicine 2010: 36: 1327–32.
39. , , , et al. Goal-directed fluid management based on pulse pressure variation monitoring during high-risk surgery: a pilot randomized controlled trial. Crit Care 2007; 11: R100.
40. , , , et al. Intraoperative fluid optimization using stroke volume variation in high risk surgical patients: results of prospective randomized study. Crit Care 2010; 14: R118.
41. , , . Goal-directed fluid management based on the pulse oximeter-derived pleth variability index reduces lactate levels and improves fluid management. Anesth Analg 2010; 111: 910–14.
42. , , . Pulse pressure variation and stroke volume variation: from flying blind to flying right?Br J Anaesth 2009; 103: 896–7; author reply 7–9.