Physiological Changes Of Pregnancy

During pregnancy, the blood volume increases to support the growing fetus and prepare for labor and delivery. By 28-34 weeks gestation, the blood volume typically increases by 30-50%, not 10-20% or 60-80%. A 70-90% increase would be too high and not within the typical range.

During pregnancy, the lateral position is considered the optimum position for maternal cardiac output as it reduces pressure on the vena cava, allowing for better blood flow. The semi-fowler's and supine positions may compress the vena cava, limiting blood return to the heart. The prone position should be avoided during pregnancy due to potential complications.

During labor, maternal cardiac output increases progressively to meet the increased demands of the body and the growing fetus.

IV fluid bolus is given before epidural anesthesia to prevent hypotension, as epidural anesthesia can cause a drop in blood pressure. Renal hypoperfusion, sympathetic block, and respiratory depression are not typically prevented by giving IV fluids before epidural anesthesia.

During pregnancy, maternal sitting and standing diastolic blood pressure readings usually first decrease due to hormonal changes, and then increase as the pregnancy progresses.

Maternal autotransfusion typically occurs after childbirth when blood from the placenta and uterus flows back into the mother's circulatory system. It is estimated that approximately 1000ml of blood is involved in this process.

During pregnancy, due to increased oxygen demand by the fetus, maternal PaO2 levels tend to increase while PaCO2 levels decrease.

During pregnancy, there is an increase in the ventilatory rate to compensate for the increased metabolic demands, leading to a slight decrease in carbon dioxide levels and a slight increase in pH.

During pregnancy, the increased blood volume and reduced kidney function can cause serum urea and creatinine levels to decrease.

During pregnancy, hormonal changes can cause the lower esophageal sphincter to relax, leading to heartburn. This relaxation allows stomach acid to flow back up into the esophagus, causing discomfort. Decreased gastric motility and increased secretion of hydrochloric acid are not the primary reasons for heartburn during pregnancy. While consuming spicy foods can trigger heartburn in some individuals, it is not the primary cause during pregnancy.

During pregnancy, hormonal changes can cause the body to retain more water and salt, leading to swelling known as dependent edema. Decreased heart rate and elevated blood pressure are not usually considered normal changes during pregnancy. Shortness of breath can occur due to pressure on the diaphragm from the growing uterus, but it is not specifically related to cardiovascular changes.

The average blood loss during vaginal birth is typically in the range of 500-600ml. Excessive blood loss during childbirth can lead to complications for the mother that's why it's important to monitor and manage blood loss during the birthing process.

The correct answer is c. 1000ml. Cesarean births typically result in more blood loss compared to vaginal births due to the surgical nature of the procedure. While actual blood loss can vary, an average of 1000ml is commonly observed.

During pregnancy, the body undergoes significant changes to support the growing fetus. One of these changes includes an increase in cardiac output to ensure that both the mother and the baby receive an adequate blood supply. Typically, cardiac output increases by 30-50% during pregnancy, making option b the correct answer.

Cardiac output peaks immediately after birth due to changes in the fetal circulation transitioning to normal circulation.

During pregnancy, the body adapts to support the growing fetus by decreasing systemic vascular resistance, allowing for increased blood flow.

During labor and early postpartum, the expected white cell count is elevated as a normal physiological response to stress and inflammation. The range of 20,000-22,000 mm3 is considered typical during this period.

During pregnancy, most coagulation factors increase to support the maternal-fetal interface. However, platelet count remains relatively stable throughout pregnancy and does not significantly increase.

During pregnancy, the glomerular filtration rate increases to allow for increased filtration of waste products from the maternal blood to support the growing fetus.

The correct answer is b. 500 mL/min. This blood flow rate is essential for the proper nourishment of the uterus during pregnancy and menstrual cycles.

Linea negra is the correct term for the pigmented line in the skin during pregnancy, while spider nevus refers to a cluster of dilated blood vessels and striae gravidarum are stretch marks. Umbilical hernia is unrelated to the pigmented line in the abdomen.

During pregnancy, the body's demand for oxygen increases to support the growing fetus, leading to an increase in O2 consumption. Other changes include an increase in respiratory rate to meet the higher oxygen demand and no decrease in tidal volume. Additionally, CO2 production does not necessarily increase during pregnancy.

Glycosuria refers to the presence of glucose in the urine, which can be a normal finding during pregnancy due to hormonal changes. Hematuria (presence of blood in urine), proteinuria (presence of protein in urine), and leukocytosis (increased white blood cell count) are not typically considered normal findings during pregnancy and should be further evaluated.

During pregnancy, the functional residual capacity of the respiratory system decreases due to the upward displacement of the diaphragm by the growing uterus.

During late pregnancy, insulin sensitivity decreases due to hormonal changes to ensure an adequate supply of nutrients to the developing fetus. This leads to higher blood glucose levels and can result in gestational diabetes in some women.

During pregnancy, the body experiences different metabolic changes to support the growing fetus. In the first half, anabolism (building up of complex molecules) is predominant to provide necessary nutrients while in the second half, catabolism (breaking down of complex molecules) increases to ensure energy supply.

Hemodilution occurs when there is an excessive increase in plasma volume relative to RBC volume, leading to a decrease in the concentration of RBCs in the blood. Hematocrit refers to the percentage of blood volume that is occupied by RBCs. Hypovolemia is a condition characterized by a decreased blood volume. Polycythemia is a condition characterized by an excessive increase in RBC volume, leading to a higher concentration of RBCs in the blood.

Maternal weight gain during pregnancy is attributed to the mother's body storing fat, increasing blood volume, and retaining fluids to support the developing baby. The weight gained is primarily associated with the mother's physical changes rather than the baby, placenta, or amniotic fluid alone.

During pregnancy, both maternal metabolic rate and maternal thyroid hormone levels increase to support the growing fetus and ensure proper development.

Volume homeostasis is primarily regulated by the kidneys' regulation of sodium levels in the blood. Renal sodium plays a crucial role in maintaining the body's fluid balance.