2013 end of module exam Flashcards
What is the most common source of TB infection in old people in developing countries? A. Crowded households B. Active TB infection C. Reactivation of latent TB infection D. Unavailability of anti-TB drugs
C. Reactivation of latent TB infection
A cohort study was done to compare the efficacy of 2 drugs in the treatment of hypertension. Some hypertensive patients received drug A and some received drug B. BP was measured before and 4 months after follow-up. Which of the following measures of association is the best to know which drug is more effective?
A. Comparing the risk of hypertension between the 2 groups
B. Comparing the rate of hypertension between the 2 groups
C. Comparing the odds ratio between the 2 groups
D. Comparing the difference between BP measurements in the beginning and the end of the study in the two
groups
E. 2 Kaplan-Maier curves
D. Comparing the difference between BP measurements in the beginning and the end of the study in the two
groups
Note: This is exactly how the question was stated (it was not an RCT). KM-curve is wrong because it is used to get time-to-event data. Both risk (CI) and rate are wrong because here we are not studying disease occurrence. Odds ratio is not used in cohort studies. D is the correct answer because it would really reflect the efficacy of the drugs.
A patient with TB was admitted to your hospital. What is the most effective way to prevent the spread of TB to others?
A. Identifying the patient’s contacts and treat those who are PPD positive
B. Washing hands before and after contact with the patient
C. Isolation in a negative pressure room
D. Wearing gloves, masks, and gowns
C. Isolation in a negative pressure room
A 45 year old smoker wants to quit smoking. He asked you “Doctor, if I stop smoking now, when will my risk to develop cardiovascular diseases be the same as a non-smoker?” what will be you answer? A. Yes, in 1 year B. Yes, in 8 years C. Y es, in 15 years D. Yes, In 25 years E. No, this can never happen
C. Y es, in 15 years
A randomized control trial was done to assess a new drug for reducing COPD-related deaths. Two groups were selected; one group took the new drug and the other group took the old one. Calculate the relative risk reduction in mortality.
possibility of death for Treated group: 11.8
possibility of death for Placebo group: 15.2
A. 10-15%
B. 20-25%
C. 75-80%
D. 60-65%
B. 20-25%
Note: “Probability of death at 3 years” means cumulative incidence (probability of death after following the patients for 3 years).
RR= Risk of death among the treated group/ Risk of death among the placebo groupRR=11.8/15.2= 78% RRR=1-78= 22%
Which bone will be deviated due to fracture of the nasal septum? A. Vomer B. Maxillary bone C. Palatine D. Ethmoid
A. Vomer
Which part is affected the most in primary ciliary dyskinesia?
A. Alveoli
B. Trachea
C. Segmented bronchi
D. Lobar bronchi
Note: The trachea has the maximum number of cilia.
B. Trachea
Which cell is part of the blood-air barrier? A. Pneumocyte 1 B. Pneumocyte 2 C. Clara cell D. Brush cell E. Goblet cell
A. Pneumocyte 1
Which cell secretes material involved in the protection of the terminal bronchioles?
A. Pneumocyte 1
B. Pneumocyte 2
C. Clara cells
C. Clara cells
Which cell divides by mitosis to replace other cells and secretes material that has a bactericidal effect? A. Pneumocyte 1 B. Pneumocyte 2 C. Clara cells D. Ciliated columnar cells E. Bipolar neurons
B. Pneumocyte 2
Which structure will be affected by Trauma above the clavicle? A. Cervical pleura B. Diaphragmatic pleura C. Mediastinal pleura D. Costal pleura
A. Cervical pleura
Infection of which paranasal sinus will cause toothache? A. Anterior ethmoidal cells B. Posterior ethmoidal cells C. Sphenoidal sinus D. Frontal sinus E. Maxillary sinus
E. Maxillary sinus
Relaxation of which muscle increases the thoracic pressure (or decreases the vertical diameter during expiration)?
A. Diaphragm
B. Internal intercostal muscles
C. External intercostal muscles
A. Diaphragm
What allows expansion of vessels?
A. Pulmonary artery
B. Pulmonary ligament
B. Pulmonary ligament
What component encodes forming the lung buds?
TBX4
Which lymph nodes drain the left lower lung margin (or cancer in the left lower lobe first metastasizes to which lymph nodes)? A. Right broncho-mediastinal B. Inferior tracheo-bronchial C. Right tracheo-bronchial D. Left tracheo-bronchial
C. Right tracheo-bronchial
Which structure is insensitive to pain?
A. Parietal pleura
B. Visceral pleura
B. Visceral pleura
The superior free margin of which structure makes the vocal ligaments? A. Quadrangular membrane B. V estibular ligament C. Ary-epiglottic ligament D. Conus elasticus
D. Conus elasticus
Injury to which nerve causes hoarseness of voice?
A. Glossopharyngeal
B. Inferior laryngeal
B. Inferior laryngeal
The internal laryngeal nerve pierces which membrane?
A. Thyrohyoid membrane
B. Thryoepiglottal membrane
A. Thyrohyoid membrane
What structure has to be identified and carefully isolated in the separation of 2 bronchopulmonary segments from each other?
A. Pulmonary artery
B. Pulmonary vein
C. Pulmonary ligament
B. Pulmonary vein
Which laryngeal muscle is an abductor of the vocal ligaments? A. Lateral crico-arytenoids B. Oblique arytenoids C. Thyro-arytenoids D. Transverse arytenoids E. Posterior crico-arytenoids
E. Posterior crico-arytenoids
Which of the following muscles contracts/relaxes during inflating a balloon?
A. Diaphragm relaxes and intercostal muscles contract
B. Intercostal and abdominal muscle contract
C. Intercostal muscles relax and diaphragm contracts
B. Intercostal and abdominal muscle contract
Note: The concept is to understand the type of action you use to inflate a balloon, which is forced expiration. Intercostal muscles contract to provide rigidity to the intercostal space, and since it is “forced” expiration, accessory muscles, such as abdominal muscles, will contract as well.
What happens when there is injury to intercostal nerves 9, 10, and 11 on one side?
A. Paralyzed diaphragm
B. Paradoxical movement
C. Inspiration will continue normally
D. Sensation will be lost from the peripheral part of the diaphragm
D. Sensation will be lost from the peripheral part of the diaphragm
Note: We had the same question in the OSPE. The pointer was at the peripheral part of the diaphragm and the question was “Which nerve is responsible for the sensation of structure X?”