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Zorluk: OrtaNormal Pregnancy and Prenatal Care

Match the following physiological mechanisms of normal pregnancy with their expected clinical or laboratory manifestations.

  • Progesterone-mediated stimulation of the central respiratory centerChronic compensated respiratory alkalosis with decreased PaCO2
  • Maternal plasma volume expansion exceeding red blood cell mass expansionPhysiologic dilutional anemia with decreased hematocrit
  • Pregnancy-induced increase in renal plasma flow and glomerular filtration rateDecreased baseline serum creatinine and blood urea nitrogen concentrations
  • Placental secretion of human placental lactogen (human chorionic somatomammotropin)Increased maternal insulin resistance and postprandial hyperglycemia

Cevap

Progesterone causes respiratory alkalosis, disproportionate plasma volume expansion causes dilutional anemia, increased glomerular filtration rate lowers serum creatinine, and human placental lactogen induces insulin resistance.
Each physiological mechanism of pregnancy is correctly matched to its direct downstream clinical or laboratory effect. Recognizing these expected maternal adaptations is critical to avoid misinterpreting normal pregnancy changes as pathological states.

Adım Adım Çözüm

1
Identify the respiratory effect of progesterone in pregnancy.
Matches 'Progesterone-mediated stimulation of the central respiratory center' to 'Chronic compensated respiratory alkalosis with decreased PaCO2'.
Progesterone increases minute ventilation, leading to increased CO2 expiration and a compensated respiratory alkalosis.
2
Analyze the hematologic changes of normal pregnancy.
Matches 'Maternal plasma volume expansion exceeding red blood cell mass expansion' to 'Physiologic dilutional anemia with decreased hematocrit'.
Plasma volume increases more than red blood cell mass, causing a dilutional effect on hemoglobin and hematocrit.
3
Evaluate the renal adaptations during normal gestation.
Matches 'Pregnancy-induced increase in renal plasma flow and glomerular filtration rate' to 'Decreased baseline serum creatinine and blood urea nitrogen concentrations'.
Glomerular filtration rate increases by up to 50%, which increases solute clearance and normally lowers serum BUN and creatinine compared to the nonpregnant state.
4
Determine the metabolic impact of placental hormones.
Matches 'Placental secretion of human placental lactogen' to 'Increased maternal insulin resistance and postprandial hyperglycemia'.
Human placental lactogen promotes maternal insulin resistance to prioritize the availability of glucose for the growing fetus.

Anahtar Kavram

Normal maternal physiological adaptations to pregnancy directly alter expected baseline laboratory values and clinical findings.
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Konular

Normal Pregnancy and Prenatal Care

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