what is your dosing regimen with thoracic epidurals using:
ropivacaine
bupivacaine
Also....if bolusing with 0.5% ropivacaine how many cc's do you guys give and what kinda infusions are you guys using??
ive been bolusing with 2% lidocaine if the catheter isnt working to check it ..also infusions im using 0.125% bupi with 2mcg fentanyl
any thoughts???
Yes.
My thoughts are....
thoracic epidurals are frikkin awesome for intraoperative analgesia.
Don't understand why attendings would wanna place a thoracic epidural and not exploit it's benefits intraoperatively.
Say, for a thoracotomy, you place a preoperative thoracic epidural.
Assuming its in the right place...
yeah, laugh, but placing a thoracic takes alotta skill....many, many thoracics are placed...but arent in the RIGHT place.........remember, in contrast to a lumbar, where you're "walking up" the level...... with a thoracic, you're establishing a BAND of anesthesia....a few levels above and a few levels below where you've driven the Tuohy.....
SOOOO.....
You
drive the Tuohy.
Say its T-10.
And you'd bet your last-months 40K paycheck that its in the right place.
Time to dose.....before the operation starts, of course.
Take
2% lido, .5%bupiv, or .5% ropiv.
Squirt in 5 mL. Thirty minutes before the operation.
That initial volume, assuming the catheter is in the right place, should give enough analgesia for a thoracotomy such that when the surgeon opens on, say, a lobectomy, your volatile agent end-tidal should be surprisingly low.....say a sevo ET of .8.....or a des ET of 1.8.....skin incision and subsequent rib manipulation shouldnt bring a labile hemodynamic rise...
in other words....your paralyzed patient thats just received an astoundingly painful stimulus is requiring just enough gas to tolerate the endotracheal tube.....and your thoracic epidural is providing the analgesia for the operative site.
Keep dosing it.
About 5mL an hour.....
I use BP as an indicator.
Art line trending up?
More thoracic local.
Art line holding steady?
Wait a while.
Remember, Dude/Dudettes, this
anesthesia sh it is a science....yeah....but its also an
art. Patients havent read the book on how to respond...you write the book with your responses. I use
blood pressure trends to dictate how to dose an intraoperative epidural.
Blood pressure going up=dose more local.
Blood pressure holding= wait a while, maybe dose 2-4mL judiciously, if the one-hour-time-has-arrived.
If you are placing a thoracic epidural and not using it intraoperatively you are.....NO......the PATIENT is missing out on the benefits of your preoperative work.
Keep dosing intraoperatively.
Usually about 5mL/hr for a thoracic catheter.