Mini PCNL: Minimally Invasive Treatment for Large Kidney Stones

Each year, more than 500,000 people visit an emergency room because of a kidney stone, which can cause severe kidney pain and blood in the urine. Dr. Daniel Marchalik discusses outpatient tubeless mini PCNL, a minimally invasive procedure for large kidney stones.

 

TRANSCRIPT

Intro: MedStar Washington Hospital Center presents Medical Intel where our healthcare team shares health and wellness insights and gives you the inside story on advances in medicine.

Host: We’re speaking with Dr. Daniel Marchalik, the Director of Ambulatory Urologic Surgery at MedStar Washington Hospital Center. Thank you for joining us today, Dr. Marchalik.

Dr. Marchalik: Thanks so much. Happy to be here.

Host: Today we’re discussing percutaneous nephrolithotomy, or PCNL, a technique used to remove kidney stones. Dr. Marchalik, could you begin by discussing who would be a candidate for mini PCNLs?

Dr. Marchalik: Yeah, so PCNLs are...actually, it’s a very interesting procedure because traditionally we’ve always thought of PCNLs as being a very invasive and a very difficult procedure. But increasingly, what we’re finding is that PCNLs, or the indications for PCNLs, have been expanded. So, anyone who has a large kidney stone - and by that I mean a stone that’s bigger than 1-½ centimeters - is automatically a better candidate for a PCNL than other types of surgery, barring other considerations, of course. But for mini PCNLs specifically, what we’re finding is that patients that have intermediate-sized stones - so maybe a lower pole stone that’s a little bit bigger than a centimeter or other stones that are bigger than a centimeter and a half but maybe less than a full staghorn calculus, which is a stone that occupies the whole kidney - those are the perfect patients.

Host: What are some common symptoms people have before they’re diagnosed with kidney stones?

Dr. Marchalik: A lot of times people will present with pain in their kidney or in their back. They might feel like they are actually passing a kidney stone, in which case they will have spasms. In fact, people have actually compared kidney stone pain to childbirth. And, they did a study on this and it turns out that passing a kidney stone is as painful as giving birth. It’s one of the few times that guys can actually feel what women go through. Also, sometimes you can present with an infection in the urine or blood in the urine. And, all of those could potentially be caused by kidney stones.

Host: How does a mini PCNL operation work and what are its greatest benefits?

Dr. Marchalik: So, percutaneous nephrolithotomy - if you actually break the word down, it means that we are going percutaneously through the skin into the kidney. And nephrolithotomy means that we’re taking the stone out of the kidney. So, we put a small opening into the kidney, through the back, and through that opening we’ll put in a scope and a probe that can break the stone up into smaller pieces and actually suction those pieces out. The greatest benefit of the mini PCNL versus a regular PCNL is that with this procedure we still get all the benefits of a PCNL. So, we still can get patients out of the hospital with less stones or no stones at all. We can decrease the number of surgeries that they need to become stone free. But, it’s got some new benefits - meaning, we do it through a small opening so there’s less pain afterwards. We don’t have to leave a tube behind in the back a lot of times. And, a lot of times we can actually send patients out the same day. So, traditionally people would have to stay in the hospital for several days to get this procedure. But now we can actually get patients in and out and still be able to clear way more s