Intra-Aortic Balloon Pump Review 9/06
What is LMNOP? What if LMNOP doesn’t work?
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- How do I know if the balloon is working
- What if the balloon goes in, and they’re still having symptoms
- What are V-waves Why do they come and go
What is LMNOP? What if LMNOP doesn’t work? LMNOP are the initials that some people use to remember the maneuvers to make for cardiac ischemia: Lasix (assuming they’re “wet”), Morphine, Nitrates, Oxygen, and Position (sit them up if they’re short of breath – unless they’re hypotensive!). If LMNOP doesn’t work, then you have to think about putting in a balloon pump to forcibly perfuse the coronaries. How do I know if the balloon is working? You know that the balloon is working if the patient’s chest pain goes away! You also want to look at their EKG to see if their ischemic changes, if any, have resolved – remember, some diabetic patients, and we see lots of them - don’t have chest pain with ischemia, so you have to be careful. There are “anginal equivalents” – meaning, the patient becomes ischemic, but instead of having pain, does something else – breaks into a sweat maybe, becomes short of breath… What if the balloon goes in, and they’re still having symptoms? If the ischemia isn’t controlled with IABP insertion, they probably need to go for an emergent CABG or stent procedure, since something is probably about to infarct. What are V-waves? Why do they come and go? V-waves are a sign of ischemia – they can show up as part of a PCW waveform, and in this context it means that the patient has developed “ischemic MR” – mitral regurgitation. The idea is that the ischemia has affected the papillary muscles that control the mitral valve. 
T They’ve stopped working properly, and the valve starts leaking. You can use the presence of V-waves as an indicator that the patient is still in ischemic trouble – sometimes this is useful if a patient is intubated and can’t tell you they’re having pain, or in people who don’t have pain, like diabetics with neuropathy sometimes. The goal would be the same as treating someone with ischemic changes on their 12-lead – you want to see the v-waves go away. Look for the oxygenation to worsen with v-waves, since the valve is letting blood flow backwards towards the lungs – look for it to improve once the valve is working again. http://www.biosbcc.net/b100cardio/images/FG21_07A.jpg Acute backflow of blood into the lungs… what’s the other name for that? This is the definition of a “flash”. You hear lot of people say – “Mr. So-and-So flashed today.” – meaning what, exactly? People throw terms around with no clear idea of what they mean…did he have ischemic MR? Did he plug? Be precise… Download 5.11 Mb. Share with your friends:
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