Hi L.. First of all I am saying a prayer for you right now. My oldest son has reflux, as well as a mirad of other bladder and renal issues. Luckily we diagnosed him during my 20 week ultrasound so he as been treated since birth. My son's kidneys showed up abnormal and this is how we discovered the problem thru a high rish OB. To this day my son's kidneys are about 4 times the size they should be. My prayers are that your daughter is 4 and the tests are truly unpleasant. I remember when my son was old enough to talk they became heartbreaking. Keep taking her to Children's and get a GOOD pediatric urologist. The MAG 3 renal scans I believe are the worst. This is the one where she will be taped down to a table for 45 mintues with a cath and an IV for pics. Then she will have to be upright for 10 minutes and back down on the table for another minute of pics. I'm not trying to scare you, just wanting to explain. My son has had over 18 of these since birth. The other big test is a VCUG. This is also a Nuclear Med test that involves a cath and several x-rays. They fill the child's bladder up with contrast dye and view how the bladder releases the dye and if it washes up into the kidneys. Try and get these tests scheduled back to back and do not let them take the cath out in between!!! A lot less pain and heartache for everyone involved. Just to let you know about my son's issues. He had a UPJ obstruction in is right ureter at birth that was fixed at 6 days old. He also has high grade reflux that was caused by his ureters not being implanted far enough into his bladder. They did a surgery at 2 1/2 where they cut away his ureters from his bladder and reinserted them farther as well as tapering down his ureters because they were way too large in diameter. This resulted in a ureter collape and they went in the next day to place a stint into that ureter. It was removed about 3 months later (mostly because I was pregnant and waited until the second is born before we did the removal). Because of the reflux he was on a daily antibiotic from birth to age 3. Thank God he never developed a UTI and still has not to this day. However, every time he runs a fever without any other symptoms I fear a UTI is looming. My son also has no nerve sensation to his bladder so he does not know when it is full and he should empty. This results in us teaching him by habit to go to the restroom every 2 hours.
Also be aware that this is a heridatary (i'm sure I misspelled that) problem. If/When you have another child, make sure that at the ultrasound tech is examining the kidneys VERY well. My 20 week was clean with my second son, but we still performed a VCUG when he was a month old, just to make sure.
I also pray that you have good insurance and suggest that you start a special savings account for medical expences. Our insurace was good with a high deductible, but 80-20 coverage after that, 6 years later we are still recovering from the debt we incurred from the medical bills. These are very expensive tests, but so needed. Keep track of your receipts and EOBs as well as your mileage to the hospital and drs appointments. You can use this as a medical tax deduction and it will help your refund tremendously!
I hope this has been helpful information for you. If you ever want to chat with someone who has gone thru this, please do not hesitate to contact me. I am in Central IN and my son was treated at Riley Hospital.
Good luck and many prayers.