neuraxial for hip fractures

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I have had a couple of instances where my spinal is not covering the top most portion of the incision for THR and I have to insert an LMA.

Here is my hip cocktail: 2.5- 3cc 0.5% isobaric bupiv + 15 mcg fentanyl + epi wash

Do I need to go to a higher lumbar level when doing the spinal for hips? I am usually going at L4/L5.

An additional question-- are there certain echo values for aortic stenosis that would prevent you from doing a spinal in an otherwise asymptomatic patient (valve area, mean pressure gradient, peak pressure gradient etc)?
 
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