Wat do we need as precautions for Varicocele surgery?

As mentioned in d prev quest..my hubby has very low sperm count (<4 ML/sample of 5 ML). We tried Lycopene tabs/Vit tabs as suggested by his urologist but even though the head/tail defects came dwn significantly, there was no change in the overall count. We wr suggested to get a 2nd opinion and we did. He has a left Varicocele but the surgeon said thy need to cut it in both rght & left side to correct it...we r plannin it in d last week of this month. I wanted to know wat all we shld ask d doc abt in such case and wat all precautions shld we take. Also, d doc said there r no guarantees but we will still take tat chance...any suggestions on this or alternate therapy? Should we worry on the sideeffects etc? Thanks all in advance.