All are true about bilateral diaphragmatic paralysis, except :
Correct Answer: Causes normocapnic failure
Description: Answer is B (Causes normocapnic failure): "Most patients with severe diaphragmatic weakness present with hypercapnic respiratory failure"-Harrison Sniff test is a confirmatory test of unilateral diaphragmatic paralysis. Whether sniff test is also useful for bilateral diaphragmatic paralysis is unconfirmed, although it could show a paradoxical diaphragm movement on both sides. (The person is asked to sniff and is observed with fluoroscopy. The paralyzed diaphragm moves paradoxically upwards during inhalation due to negative intrathoracic pressure.) Diaphragmatic pacing may be a ble alternative if the nerve to the diaphragm is intact. Treatment of choice for Bilateral Diaphragmatic Paralysis is assisted ventilation Note: Unilateral paralysis occurs due to more local cause e.g. nerve invasion from bronchogenic carcinoma. Patients are usually asymptomatic. Bilateral paralysis occurs due to more central or generalized causes e.g. high spinal cord injury, muscular dystrophy chest trauma. Patients present with hypercapnic respiratory failure, frequently complicated by cor-pulmonale, right ventricular failure (because of hypoxemic vasoconstriction in the lungs) pneumonia and atelectasis.
Category:
Medicine
Get More
Subject Mock Tests
Practice with over 200,000 questions from various medical subjects and improve your knowledge.
Attempt a mock test nowMock Exam
Take an exam with 100 random questions selected from all subjects to test your knowledge.
Coming SoonGet More
Subject Mock Tests
Try practicing mock tests with over 200,000 questions from various medical subjects.
Attempt a mock test now