Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.


Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Don't know
Know
remaining cards
Save
0:01
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
Retries:
restart all cards
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Renal - Hyponatremia

ACP Nephrology p11

QuestionAnswer
Formula for total osmolality 2 x Serum sodium + plasma glucose / 18 + BUN / 2.8
Does urea exert an osmotic effect? No because it is freely diffusible across most cell membranes
What is normal osmolality 280-285 (or 275 - 295)
What is the function of ADH? Promotes water reabsorption in the distal tubule and collecting duct of the kidney (causes fluid retention). Also has a peripheral vasoconstriction effect.
Serum sodium under which a patient is considered to have hyponatremia 135
First step in assessing hyponatremia Serum sodium less than or equal to 135
Second step in assessing hyponatremia Is the patient symptomatic?
What are mild symptoms of hyponatremia? Headache, lethargy, dizziness
What are symptoms of severe hyponatremia? confusion, ataxia, seizures, obtundation, coma, respiratory depression
If a patient with hyponatremia is asymptomatic or has mild symptoms, then what is the next step? Assess serum osmolality. Hypotonic hyponatremia is osmolality < 280. Isotonic hyponatremia is osmolality 280-285. Hypertonic hyponatremia's osmolality > 285.
What is the differential for isotonic hyponatremia? Hyperproteinemia or hyperlipidemia
What is the differential for hypertonic hyponatremia? Hyperglycemia, mannitol, sorbitol, contrast
Created by: christinapham