heart burn MCQ of sept 2011

1.85. Excess pressure of stethoscope in blood pressure (BP) measurement
a. Artificial lowers diastolic BP by 10mm Hg !
b. Artificially lowers systolic BP by 5mm Hg
c. Artificially lowers systolic BP by 10mm Hg
d. Causes no change

the answer is a .WHO manual of BP measurement mentions that sometimes when we are in hurry we may not put the BP cuff properly. Ideally it should be atleast 2 finger width above the crease of the cubital fossa. this means now you have less space to squeeze in the bell of the steth. This implies that you would now press on the steth too hard on the arm of the patient. IT CAN NOT CHANGE THE FORCE WITH WHICH OUR HEART WILL PUMP BLOOd. SO SYSTOLIC BP WILL BE NOT CHANGED which is appearance of the first KOROTOKOFF sound. however it will afflict the disappearance of the fifth korotokoff sound which is the diastolic BP .

2. The correct dose of vitamin A for xerophthamia in adult is
a. Two dose of 60 mg two weeks apart !!
b. Single dose of 60 mg
c. Two doses of 30 mg two week apart
d. Single dose of 30 mg
answer is A
1 µg retinol = 3.33 IU.
Dietary deficiency is traditionally treated with vitamin A palmitate in oil 60,000 IU po once/day for 2 days, followed by 4500 IU po once/day. If vomiting or malabsorption is present or xerophthalmia is probable, a dose of 50,000 IU for infants < 6 mo, 100,000 IU for infants 6 to 12 mo, or 200,000 IU for children > 12 mo and adults should be given for 2 days, with a third dose at least 2 wk later