Page 115 - AACN Essentials of Critical-Care Nursing Pocket Handbook, Second Edition
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           Referencing and Zeroing the Hemodynamic Monitoring System















                             B                C  (A) The level of the phlebostatic axis as the patient moves flat to a higher level of backrest. The level of the axis for referencing and zeroing the air-fluid inter- face rotates on the axis and remains horizontal as









                             60°


                                  30°    0°







           4.11                              A
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