The most severe type of urinary tract trauma is that which presents with

Correct Answer: D

Rationale: The correct answer is D: Fistula formation. Fistula formation is the most severe type of urinary tract trauma as it involves an abnormal connection between the urinary tract and another organ or the skin. This condition can lead to severe complications such as recurrent infections, incontinence, and even sepsis. Retention of urine (A) is a symptom of urinary tract obstruction, not necessarily the most severe type of trauma. Stress incontinence (B) is a common condition but is not indicative of severe trauma. Scalding sensation (C) can be a symptom of a urinary tract infection but does not necessarily indicate severe trauma like fistula formation.

Correct Answer: A

Rationale: The correct answer is A: Caput succedaneum. This swelling is a result of pressure during birth and typically resolves on its own. Subgaleal hemorrhage involves bleeding into the potential space between the periosteum and skull, presenting as a boggy mass. Intracranial injury refers to damage within the skull, often due to trauma. Neonatal cephalhematoma is a subperiosteal collection of blood, causing a localized swelling. Caput succedaneum is the most likely diagnosis based on the description provided.

Correct Answer: B

Rationale: The correct answer is B: Inadequate surfactant levels. Surfactant is a substance that reduces surface tension in the alveoli, preventing their collapse. In respiratory distress syndrome, premature infants have insufficient surfactant production, leading to collapsed alveoli and difficulty breathing. Choice A is incorrect because it focuses on quality rather than quantity of surfactant. Choice C is incorrect as rib cage underdevelopment is associated with congenital conditions like thoracic dystrophy, not RDS. Choice D is incorrect as gradual alveolar rupture is not a known cause of RDS.

Correct Answer: B

Rationale: The correct answer is B: Escherichia coli. Puerperal sepsis is often caused by endogenous bacteria from the mother's own flora. E. coli is a common endogenous bacteria found in the gastrointestinal tract and can cause infection during childbirth. Chlamydia trachomatis is a sexually transmitted infection, not typically associated with puerperal sepsis. Clostridium tetani causes tetanus, not puerperal sepsis. Pseudomonas aeruginosa is an environmental pathogen, not typically an endogenous cause of puerperal sepsis.

Correct Answer: B

Rationale: The Kleihauer-Betke acid-elution test is recommended in the management of hemolytic jaundice prenatally because it helps determine the amount of fetal-maternal hemorrhage, which is crucial for assessing the need for Rh immune globulin administration to prevent Rh sensitization in Rh-negative mothers carrying Rh-positive fetuses. This test helps quantify the amount of fetal red blood cells in the maternal circulation, guiding appropriate management to prevent hemolytic disease of the newborn. The other choices (A, C, D) do not specifically require the Kleihauer-Betke test for management and are not directly related to fetal-maternal hemorrhage assessment.