i spent a few minutes researching the question. it sounds like the answer you need is what vitja_1 said while also emphasizing that you not consume more kratoom before the procedure.
the one case study i just read involved much higher quantities of habitual kratoom consumption. suffice to say, the patient survived without lasting injury despite some surgical complications. namely, the researchers speculated that his kratoom use made the patient require substantial extra anesthetic agents, the post-operation pain killers were less effective, and, most significantly, the patient experienced a state of delerium presumably due to kratoom withdrawal while coming out of anesthesia.
again, you have nothing to worry about. i just thought it was worthwhile to summarize the case study.