I think that as long as you continue to take care of yourself, you should be alright in terms of surgery & healing.
Do you mean you're going under general anesthesia (where you're asleep)? If that's the case, just be sure to communicate with the doctors about your needs before hand. I did that & even as they were putting me under (for sinus surgery), I reminded them I didn't want Decadron (steroids) and I reiterated to them not to be alarmed because my pump might beep every now & then. They were cool with things & everything turned out well. I did wake up with a higher sugar level, but was able to bring it back down with a bolus.
If you're doing local anesthetic, you should still be awake & able to communicate with the doctors if needed (of course, depending on what type of surgery you're having - if it's dental, that may be a different story

).
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ALL my love, Carwy & Best wishes for a healthy new beginning!
Saying prayers for him & all our friends, every day.
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"Someone must speak for them. I do not see a delegation for the four footed. I see no seat for eagles. We forget and we consider ourselves superior, but we are after all a mere part of the Creation."
--Oren Lyons, ONONDAGA
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Pumps & Meters Used:
MM506,7,8,11 & 12, Cozmo, Animas 1200 & 1250
Many
A1C: 6.4
Type I 26yrs, pumping 12