pharma qq - bilal1

[ArchivalUser]

a man wt 70 kg , NaCl intake is 200 mmol/kg. excretion of NaCl is as follow
day 1.....30 mmol/kg
day2.......90 mmol/kg
day3 ......180mmol/kg
day4......200mmol/kg

assuming 1lt of 0.9%saline containing 150mmol of NaCl and wt 1 kg. how much will this pt in kg at the end of day 4
a.66 kg
b .68
c. 70
d.72
e.74
plz explain your answer too

[ArchivalUser]

D!!!

Tips if you don't know the answer go with B or D, since B(68) is less than D, and the patient is getting fluid go with D

Hi bilal1

[ArchivalUser]

asa bro
yes your answer is right but how to solve this i even don't know but i find this qq on usmle oreintation step 1 qq bock 3 qq no 40/41

[ArchivalUser]

i agree, D
day 1: retains 170mmol/kg
day 2: retains 110mmol/kg
day 3: retains 20 mmol/kg
day 4: retains 0

so, 170 + 110 + 20 + 0 = 300mmol / 150mmol = 2
since 150mmol wt 1kg the pt wt is 72kg

that's the way i did it, correct me if i'm wrong

[ArchivalUser]

First add the fluid the patient lost in 4 days:
30+90+180+200=500

then the intake for 4 days is 200X4=800

The amount retained by the patient is 800-500=300mmol
150mmol------->1kg
300-------------->xkg

x=2kg

Pt wt is 70 and gain 2 more, so 72kg at day4

[ArchivalUser]

bilal1& macusa is it a bolus 200mmol or 200mmol/day???

[ArchivalUser]

i guess 200mmol/day,
is it right, bilal1?

[ArchivalUser]

bilal1, this is for step2, but I suggest you to download and watch during your break, it is fun



University of Arizona USMLE Step 2 CK Boards Preparation Videos by: Dr. Bill Johnson


http://rapidshare.com/files/187117175/bo...lass_1.rar

http://rapidshare.com/files/187117087/bo...lass_2.rar

[ArchivalUser]

it is 200 mmol/day

[ArchivalUser]

thankyou