Using GFR and Hydration Protocol? How does your dept handle it?

  1. Currently we do a BUN & Creat on patients over the age of 65 and those with diabetes or kidney failure prior to CT contrast. We are getting ready to change this protocol but the new protocols haven't been written yet and the powers that be are calling other hospitals to see what they're doing so of course I'm going to ask my buds on all nurses.

    I know that we will be using GFR and we will be dropping the age down to 50. If a patient's GFR is elevated we will be giving 250cc NS prior to scan and directly after the scan. My manager tells me that we will be giving the pt's a script for PO mucomyst. I thought that mucomyst needed to be taken prior to the contrast in order to protect the kidneys? If this is true shouldn't we be testing for the GFR the day prior to the CT scan?

    Thanks so much
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    About DutchgirlRN

    Joined: Aug '04; Posts: 6,708; Likes: 1,447
    Medical Imaging RN~Special Procedures CT
    Specialty: 33 year(s) of experience in OB, M/S, HH, Medical Imaging RN


  3. by   dianah
    Not ignoring you, Dutch, just gotta get those ducks in a row in order to post semi-intelligently.
  4. by   DutchgirlRN
    Quote from dianah
    Not ignoring you, Dutch, just gotta get those ducks in a row in order to post semi-intelligently.
    Thank you di your help/input is very much appreciated. Cheers!
  5. by   dianah
    We require BUN/creat (actually, Chem 7, CBC w/o diff and coags) results within a month on all heart cath pts.
    Our clientele is *usually* men in their 50's - 80's (as a VA facility, we deal with adults only).
    If creat. is >1.5 and/or eGFR is <60, we use Visipaque, otherwise everyone gets Omnipaque.
    All pts are prehydrated but the Cardiologists differ in their opinion on what this means.
    One insists each pt receive a 500ml NS bolus before coming into the Lab.
    The others are happy if the pt has an IV hanging when s/he enters the room, don't question the rate.
    We nurses are still trying to educate the "floor" nurses and the residents to hydrate the pts, that just a saline lock overnight is not enough if the pt is NPO to receive contrast for a cath the next day. (banging head against wall here)

    I always speed up the IV to 150ml/hr (or more, depending on the EF - if known - --- if EF=20% or less, I consult with the Cardiologist for the IV rate, which is rarely below 50ml/hr) when the pt enters the room I don't leave the IV on a pump or depend on a Dial-A-Flow, as I want to be able to open it up at will and immediately, if I need to.

    N-acetylcysteine (2 doses, 600ml/(po) dose pre-cath, and one dose post-cath) is given if Visipaque is used (same lab criteria).

    Our Vascular surgeons' protocol is different:
    NS @ 75ml/hr for all pts.
    N-acetylcysteine for creat >1.1.
    NaHCO3- 150mEq in D5/W 850ml = 1000ml, TRA 3ml/kg/hr X 1hr, then maintain at 1ml/kg/hr during case and X 12 hr post-case.
    Visipaque for ALL pts.

    Our IR Dept. requires labs within three months of pt (all pts; there is no age limit) having, say, a contrast CT exam.
    I don't know what their protocol is for prehydration, mucomyst, etc.

    (makes me think we need to get together and standardize it for the hospital, but then again, one would be dealing with so many strong personalities w/their difft opinions . . interesting thought, though )

    Below are some reference articles that may be helpful.
    These discuss prehydration (how much and when to give).
    Also, interestingly (and in keeping with your policy of who gets labs drawn), the consensus is that all pts don't need labs drawn before receiving contrast. (I like to know, on the off chance . . )

    These address the use of N-acetylcysteine before contrast admin, to reduce the risk of RCIN:

    This one is a good general information article answering questions about when to draw, and what labs to draw before contrast admin.:
    Last edit by dianah on Sep 14, '07
  6. by   NRSKarenRN
    check out: ajn article september 2007, 107:9

    ce preventing contrast medium-induced nephropathy.
    cindy kohtz, edd, rn, cne; maren thompson, pharmd
    this condition, marked by an acute decline in renal function after the administration of contrast media, can progress to irreversible renal dysfunction. but it is preventable in many cases.
  7. by   DutchgirlRN
    Thanks Di I appreciate the info and the links are awesome, I've printed them out.

    I am so happy and thankfully that your fur baby is so quickly on the mend. It's so hard to see them feeling bad.