I believe the HCT drops because instead of a blood transfusion she was given a normal saline solution. This means that the volume of the blood and plasma increased, but her erythrocytes weren’t replenished. This leads to the decreased hematocrit. 4. Why do you think paramedics give normal saline solution (NSS) and not blood in the ambulance?The paramedics gave Maggie NSS instead of blood because they were worried about her low blood pressure. With giving her the saline solution they were able to increase blood volume which increases blood pressure. 5.Why might a physician be reluctant to order a blood transfusion for Maggie, or for any patient for that matter, unless absolutely necessary? 6. Despite no blood transfusion, Maggie’s hematocrit improves by the time she visits her physician for the removal of her sutures a week later. [See multiple choice question 3 for the calculation.] She is adequately hydrated. Explain the physiological mechanism for the improvement in her hematocrit. A decreased hematocrit level leads to low oxygen being delivered to the body and its tissues. When this happens, the kidneys kick up a homeostasis mechanism. The low oxygen level signals the kidneys to release erythropoietin. Erythropoietin, is a hormone found in red bone marrow which induces the production of red blood cells.