Murphy's eye

  1. Is the primary purpose of the Murphy's eye on the ETT to ventilate the right lung, or is there a more arcane purpose for it?

    Thanks in advance!!
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    About RN-RD

    Joined: Jan '04; Posts: 34; Likes: 1


  3. by   WntrMute2
    This is a joke right. Right?
  4. by   yoga crna
    Actually, it's a good question. If I remember correctly, it provides another area for ventilation, in case one gets occluded with a mucous plug. I am pulling that out of the deep depth of memory and didn't look it up. I'm sure it is addressed in some new anesthesia techniques book.
  5. by   RN-RD
    Unfortunately it is not a joke. I was told something awhile ago that it had an additional purpose unrelated to ventilating the lungs, but I cannot remember what I was told. This subject has come up recently, and I could not find any references.

    Perhaps the person that told me this was just pulling my leg and I fell for it, but whatever it was seemed to make sense at the time.

    I am sorry I posted this seemingly ridiculous question
  6. by   RN-RD
    Thanks yoga CRNA!

    We must have been posting at the same time and I did not see your response until after I posted.
  7. by   Passin' Gas
    Dorsch and Dorsch, Understanding Anesthesia Equipment, Fourth edition, page 562:

    ....shows a hole through the tube wall on the side opposite to the bevel. this is known as a Murphy eye, and a tube with this feature is called a Murphy or Murphy-type tube. The purpose of the eye is to provide an alternate pathway for gas flow if the bevel is occluded. ...Some tubes have a second eye on the bevel side. This may provide a measure of safety should the tube accidentally advance into the right mainstem bronchus.

  8. by   yoga crna
    Passin Gas,
    Thanks for looking it up. It makes me realize how much anesthesia information I have stuffed into this brain for 44 years. There is a lot to know, but it is even better to know where to find the answer.
  9. by   RN-RD
    Thank you so much Passin' Gas!

    Your posting answered my question and I am very grateful. These types of questions come up when I teach ACLS, and I wanted to make sure that I have the correct information to provide to the participants.
  10. by   WntrMute2
    Sorry RN-RD, my cynicism ran away with me. A CRNA early on in my training told me that the eye was to ventilate the right upper lobe in case of right mainstem intubation. I knew just enough to nod wisely while believing he was full of it.
  11. by   Brenna's Dad
    Now for the $25 000 QUESTION.

    "What does RAE stand for concerning RAE tubes?"

    (Please insert Jepopardy theme music here)
  12. by   Passin' Gas
    Ring-Adair-Elwin...took three guys to come up with this one! I only remembered Ring and Elwin. Had to revisit Dorsch and Dorsch

    Last edit by Passin' Gas on Mar 18, '04
  13. by   Passin' Gas
    And "show me the money!!"
  14. by   Gump
    oral Ring-Adair-Elwyn

    Ding,Ding,Ding,Ding,... Tell 'em what he's won Bob!