Q. What do high readings in kidney function tests indicate?

Answered by
Dr. Anshul Varshney
and medically reviewed by Dr. Sneha Kannan
This is a premium question & answer published on Feb 19, 2016 and last reviewed on: Apr 23, 2019

Hi doctor,

I am scheduled for extracorporeal shock wave lithotripsy (ESWL) to treat a kidney stone that was discovered through testing for gross hematuria. My pre-operative blood work came back with a number of readings that were flagged as high. It includes Alpha-1-acid glycoprotein (AGP) 17, blood urea nitrogen (BUN) 25, creatinine level 1.3, calcium 10.3 and Na is 148. Is this anything should I be concerned about? Should I see a nephrologist prior to the ESWL? Or do you think that it is fine to proceed with the treatment as planned?



Welcome to

Your high readings in kidney function tests are probably attributed to the kidney stone that you are having. Any stone present in kidney that is causing hematuria is very likely to cause transient rise in creatinine levels and alter the kidney function test too.

This is the reason for the stone need to be removed else it would cause permanent kidney damage. I suppose there is no need to see a nephrologist at this point. Once your stone is removed, your kidney function would dramatically improve within a matter of few weeks.

However, I would still need to know the location of the stone? What is the size of the stone and any hydroureteronephrosis associated? If possible just attach your ultrasound or CT report. I will get my answers from the report and would help you with my final comment.

Hello doctor,

Just now I talked with my urologist who concurred and I have decided to go as planned. My kidney stone is 1.2 cm as showed on CT and is located in the lower right kidney. Thank you.



Welcome back to

Your stone is quite big in size to cause obstructive uropathy. I suppose you should get the procedure done as planned and write back to me again with fresh kidney function test report.

If it does not improve you would require a DMSA scan (radionuclide scan uses Dimercaptosuccinic acid) further. Wish you a successful surgery.

Was this answer helpful?


Same symptoms doesn’t mean you have the same problem. Consult a doctor now!

Related Questions:
I have kidney stones. Is it dangerous to have creatinine level of 1.6?

.. your history you might be having a urinary tract infection. Urine infection is a known complication in patients with urine stones. Do you have other complaints in addition to burning sensation like fever with or without chills, abdomen pain, vomit...   Read full

How to Prevent Kidney Stones?

.. ways to prevent the formation of kidney stones .. ...   Read full

Why is my husband having painless hematuria since a year?

Hello doctor, My husband who is 36 years old, is having painless hematuria since last year ... There are stones in his kidney, and grade I prostrate enlargement, But, all these are less likely to cause ...   Read full

Also Read Answers From:

ideaComprehensive Medical Second Opinion.Submit your Case

Also Read

Coronavirus Variant Arcturus: | Omicron XBB.1.16 Variant
Arcturus is an emerging variant of the Omicron virus that causes various symptoms and spreads rapidly across the world. ...  Read more»
Adrenaline Rush - Symptoms, Causes, Effects, and How to Control
Adrenaline is a hormone responsible for fight or flight response. It is also a neurotransmitter and medicine. It is also...  Read more»
Fatty Liver - Types, Symptoms, Stages, and Treatment
The liver is the largest gland in the body. Its primary function is to process the food and drinks we consume. and filte...  Read more»

Ask your health query to a doctor online?

Ask a Nephrologist Now

* guaranteed answer within 4 hours.

Disclaimer: No content published on this website is intended to be a substitute for professional medical diagnosis, advice or treatment by a trained physician. Seek advice from your physician or other qualified healthcare providers with questions you may have regarding your symptoms and medical condition for a complete medical diagnosis. Do not delay or disregard seeking professional medical advice because of something you have read on this website. Read our Editorial Process to know how we create content for health articles and queries.