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Which is the most common causative agent of bacterial endocarditis?
- A. Staphylococcus albus
- B. Streptococcus hemolyticus
- C. Staphylococcus albicans
- D. Streptococcus viridans
Correct Answer: D
Rationale: S. viridans is the most common causative agent in bacterial (infective) endocarditis.
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Regarding fluid and electrolyte homeostasis in a child:
- A. Normal maintenance requirement in a child weighing 20 kg is 1.5 litre/day
- B. A fluid deficit of 50ml/kg produces a body weight loss of 10%
- C. Hypotension is a useful sign ,which indicates moderate dehydration
- D. Normal maintenance needs of sodium are 5-6mmol/kg/day
Correct Answer: B
Rationale: A fluid deficit of 50ml/kg producing a 10% body weight loss is a well-established clinical guideline for assessing dehydration in children. Hypotension is a late sign of severe dehydration, not moderate dehydration.
Progressive spinal muscular atrophy of infancy presents with:
- A. Severe generalised weakness
- B. Fasciculations in the tongue
- C. Loss of spinothalamic tract function
- D. Spontaneous fibrillation on electromyography
Correct Answer: A
Rationale: Progressive spinal muscular atrophy presents with severe weakness and tongue fasciculations. Spinothalamic tract function is preserved, and electromyography shows fibrillation.
A nurse assists a male client with Parkinson's disease (PD) to ambulate in the hallway. The client appears to 'freeze' and then carefully lifts one leg and steps forward. He tells the nurse that he is pretending to step over a crack on the floor. How should the nurse respond?
- A. Re-orient the client to his present location and circumstances
- B. Confirm that this is an effective technique to help with ambulation
- C. Assist the client to a carpeted area where he can walk more easily
- D. Plan to assess the client's cognition after returning to his room
Correct Answer: B
Rationale: Pretending to step over a crack is a known technique that can help clients with PD overcome freezing episodes.
Regarding idiopathic thrombocytopenic purpura (ITP):
- A. The more severe the disease
- B. the faster is the recovery to therapy
- C. Alloimmunisation occurs due to fetomaternal incompatibility
- D. Splenomegaly is a recognised feature
Correct Answer: C
Rationale: ITP is characterized by low platelet counts due to immune-mediated destruction. Splenomegaly is a recognized feature but the other options are incorrect. Recovery is not necessarily faster with more severe disease alloimmunisation is not a feature of ITP and not all children with platelet counts below 50 000 require hospitalization. IV immunoglobulin is not indicated in all cases.
The nurse is planning a hypertension-prevention program. What should be the main focus of the nurse when presenting information?
- A. Pharmacological treatment
- B. Surgical interventions available
- C. Patient education
- D. Reduction of aerobic exercise
Correct Answer: C
Rationale: The main focus of a hypertension-prevention program is patient education.