Nokea
Vaginal birth after caesarean section is known as
- A. Spontaneous vaginal delivery
- B. Trial of scar
- C. Spontaneous vertex delivery
- D. Trial of birth
Correct Answer: B
Rationale: The correct answer is B: Trial of scar. This term specifically refers to the process of attempting a vaginal birth after a previous caesarean section. It involves monitoring the previous cesarean scar for any signs of complications during labor.
A: Spontaneous vaginal delivery refers to giving birth vaginally without any previous cesarean section.
C: Spontaneous vertex delivery simply describes the position of the baby's head during birth.
D: Trial of birth is not a commonly used term in obstetrics and does not specifically relate to VBAC.
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The MAIN function of surfactant factor is to
- A. Prevent alveoli of the lungs from collapsing
- B. Initiate breathing of the neonate at birth
- C. Enhance maturity of respiratory centre in the brain
- D. Regulate breathing immediately the baby is born
Correct Answer: A
Rationale: The correct answer is A: Prevent alveoli of the lungs from collapsing. Surfactant reduces surface tension in the alveoli, preventing them from collapsing during exhalation and maintaining lung compliance. B, C, and D are incorrect because surfactant primarily affects lung mechanics, not the initiation of breathing, maturity of the respiratory center, or immediate regulation of breathing upon birth.
What are common complications of multiple gestations?
- A. Premature labor
- B. Twin-to-twin transfusion syndrome
- C. Preeclampsia
- D. All of the above
Correct Answer: D
Rationale: The correct answer is D: All of the above. Multiple gestations are at higher risk for complications such as premature labor, where contractions start before 37 weeks, leading to preterm birth. Twin-to-twin transfusion syndrome can occur in identical twins sharing a placenta, causing unequal blood flow. Preeclampsia, characterized by high blood pressure and organ damage, is more common in multiple pregnancies. Therefore, all choices A, B, and C are correct as they are common complications associated with multiple gestations.
In eclampsia, violent contraction and relaxation of the whole body occurs in
- A. Clonic stage
- B. Coma stage
- C. Premonitory stage
- D. Tonic stage
Correct Answer: A
Rationale: The correct answer is A: Clonic stage. In eclampsia, the clonic stage is characterized by violent contraction and relaxation of the whole body due to generalized seizures. During this stage, rhythmic jerking movements occur. The other choices are incorrect because:
B: Coma stage - In this stage, the individual is unconscious and not experiencing violent body movements.
C: Premonitory stage - This stage includes warning signs like headache and visual disturbances, but not the violent body movements seen in eclampsia.
D: Tonic stage - This stage involves sustained muscle contractions without relaxation, unlike the alternating contraction and relaxation seen in the clonic stage of eclampsia.
Hypoplastic left heart syndrome is characterized by underdevelopment of
- A. Pulmonary veins, ventricles and aortic valve
- B. Left ventricle, atrium and pulmonary vessels
- C. Aortic arch, venacava and right atrium
- D. Left ventricle, aortic valve and arch
Correct Answer: D
Rationale: Rationale:
1. Hypoplastic left heart syndrome involves underdevelopment of the left ventricle, aortic valve, and aortic arch.
2. The left ventricle is essential for pumping oxygenated blood to the body.
3. Aortic valve controls blood flow from the left ventricle to the aorta.
4. Aortic arch connects the ascending and descending aorta.
Summary:
A - Incorrect, as it includes pulmonary veins not related to hypoplastic left heart syndrome.
B - Incorrect, as it includes structures not primarily affected in this condition.
C - Incorrect, as it does not involve structures related to the left side of the heart.
The progression of coronary artery plaque formation can lead to a variety of pathologic conditions. When subtotal plaque disruption occurs resulting in vasoconstriction, platelet activation, and embolization, it most commonly causes which clinical phenomenon?
- A. Endothelial cell dysfunction
- B. Prinzmetal’s angina
- C. Transmural myocardial infarction
- D. Non-ST elevation myocardial infarction
Correct Answer: C
Rationale: The correct answer is C: Transmural myocardial infarction. Subtotal plaque disruption leads to vasoconstriction, platelet activation, and embolization, causing complete occlusion of a coronary artery. This results in ischemia of the entire thickness of the myocardial wall, leading to transmural myocardial infarction. Endothelial cell dysfunction (A) is an early event in atherosclerosis but does not directly result from subtotal plaque disruption. Prinzmetal's angina (B) is caused by transient coronary artery spasm rather than plaque disruption. Non-ST elevation myocardial infarction (D) involves incomplete blockage of a coronary artery and typically does not result from subtotal plaque disruption.