is MAP or diastolic BP below 60 that means tissues are not perfused?

[loftay13]

Hi, I'm a newly qualified nurse and this may seem a silly question but I'm a little confused. I was taught throughout my training that if the mean arterial pressure is below 60 then the tissues are not perfusing adequately but today I was told by a collegue that it is when the diastolic is below 60. Which is correct?

[llg, PhD, RN]

My dialostolic BP is often below 60 -- and my doctor and I consider that a good thing. There is nothing wrong with that. Your colleague is wrong.

[loftay13]

Thankyou :-)

[donnasRN]

No your colleague is wrong, a MAP below 60 means decreased perfusion, not the diastole. They're confusing the two. Think of this way, if a pt has a BP of 90/50, his MAP = 63. Point proven your colleague is incorrect

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[dah doh, BSN, RN]

MAP > 60 or 65 would help indicate adequate perfusion. Diastole is a filling pressure;

[lilpetRN]

Yep MAP needs to be above 60 for adequate perfusion to the body. On our unit we pay very little attention to the B/P numbers and focus more on the MAP. I have had several nephro docs tell me though that the MAP needs to be 70 or better for adequate perfusion to the kidneys.

[NotReady4PrimeTime, RN]

Coronary perfusion occurs in diastole. One requires a certain amount of pressure to adequately perfuse the myocardium, but 50 is usually enough.

[RN-LOGIC]

Typically a map above 60 is adequate perfusion. However, when dealing with hemodynamically compromise patients a map of 80 , just to say a number may not reflect an adequate body perfusion. A map can be affected by many variants.

[Guest193822]

Agree with my fellow nurses MAP

I remember when i was in my critical care course (no going to tell you how long ago ) i was taught MAP >65 is all organs perfused , MAP 60 is brain only & MAP

Hope this helps :)