Comment cet énoncé diffère-t-il des Lignes directrices de 2019? Plusieurs modifications importantes ont été apportées au contenu; elles sont surlignées en gras dans le texte. Parmi les modifications les plus importantes, citons:

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The Guidelines to the Practice of Anesthesia Revised Edition 2018 (the Guidelines) were prepared by the Canadian Anesthesiologists' Society (CAS), which reserves the right to determine their publication and distribution. The Guidelines are subject to revision and updated versions are published annually. The Guidelines to the Practice of Anesthesia Revised Edition 2018 supersedes all previously published versions of this document. Although the CAS encourages Canadian anesthesiologists to adhere to its practice guidelines to ensure high-quality patient care, the CAS cannot guarantee any specific patient outcome. Anesthesiologists should exercise their own professional judgement in determining the proper course of action for any patient's circumstances. The CAS assumes no responsibility or liability for any error or omission arising from the use of any information contained in its Guidelines to the Practice of Anesthesia.

Physical and numerical models can be employed together to better understand the SAGD process. When there are inadequate measured physical properties as input data, and insufficient built-in mathematical processes, it is beneficial to validate a numerical model by history matching physical model results.Based on Chung's experimental data from a physicalmodel, a two-dimensional, three-phase (bitumen, water and steam) and two-component (water & bitumen) black oil numerical model for the SAGD process was developed and tested, using the CMG "STARS" thermal simulator. Both the "Spreading Steam Chamber" and the "Rising Steam Chamber" processes were simulated. The numerical results agree reasonably well with the measured data for cumulative oil production, recovery percentage and temperature profiles in the model at different times.The results from the numerical simulation were found to be :relatively insensitive to the form of the relative permeability functions employed. Linear relative permeability curves were :employed to simulate the experimental production results. The . model can be employed as a tool to aid in sensitivity studies and i in the interpretation of the~aboratory results.