Kidney Stones: Causes, Symptoms & Modern Laser Treatments

Kidney Stones: Causes, Symptoms & Modern Laser Treatments

Dr. Anurag Chatterjee — MBBS (HONS) | MS General Surgery | MCh Urology & Renal Transplant

Introduction

Kidney stones are common, painful, and in most cases treatable with modern minimally invasive techniques. This article explains typical causes, key symptoms to watch for, diagnostic steps, and contemporary laser-based procedures — URSL, RIRS and PCNL — used to manage and remove stones safely and effectively.

What are kidney stones?

Kidney stones are hard deposits of minerals and salts that form inside the kidneys. They range in size from tiny grains to larger stones that can obstruct urine flow, cause severe pain, provoke infection, and potentially damage kidney function if untreated.

Common causes of kidney stones

• Dehydration: Low fluid intake concentrates urine and increases crystal formation.
• Dietary factors: High salt, high animal protein, excess sugar, and oxalate-rich foods (spinach, nuts) raise risk.
• Metabolic disorders: High urinary calcium, uric acid abnormalities, or genetic conditions like cystinuria.
• Family history: Genetic predisposition increases susceptibility.
• Urinary tract infections: Certain infections promote stone formation.
• Medical conditions or medications: Some drugs, bowel disease or surgeries alter mineral balance.

Symptoms to watch out for

Symptoms vary depending on stone size and location. Seek medical attention if you experience:

• Severe, cramping flank or back pain that may come in waves.
• Pain radiating to the groin or genitals.
• Blood in urine (pink, red, or brown).
• Urgency, burning, or frequent urination.
• Nausea and vomiting.
• Fever or chills — may indicate infection and is a medical emergency.
• Difficulty passing urine or reduced urine output.

How kidney stones are diagnosed

• Medical history and physical examination.
• Urinalysis (to check for blood, crystals, infection).
• Blood tests (kidney function, electrolytes, uric acid).
• Imaging — Non-contrast CT scan is the gold standard; ultrasound and KUB X-ray are alternative options.

Modern laser procedures to treat kidney stones

Most stones today can be treated with minimally invasive laser techniques. The major options include:

URSL — Ureteroscopic Laser Stone Lithotripsy

What it is: A semi-rigid or flexible ureteroscope is passed through the urinary tract to the ureter or kidney. A Holmium:YAG laser breaks the stone into small fragments which are removed or passed naturally.

Best for: Small to moderate stones in the ureter or accessible kidney regions.

Advantages: No incision, short stay, fast recovery.

RIRS — Retrograde Intrarenal Surgery

What it is: A flexible ureteroscope is advanced into the kidney. Laser energy is used to “dust” or fragment stones; small baskets may retrieve pieces.

Best for: Small-to-moderate kidney stones or calyceal stones.

Advantages: No external cuts, minimal trauma, excellent success rates.

PCNL — Percutaneous Nephrolithotomy

What it is: For large or complex stones, a small incision is made in the back to create a tract into the kidney. A nephroscope and lithotripsy devices remove the stones.

Best for: Stones larger than 2 cm, staghorn stones, or stones unsuitable for URSL or RIRS.

Advantages: High clearance for large stones; modern mini-PCNL reduces incision size.

Recovery & what to expect after treatment

• Most procedures are outpatient or require 1–2 days of hospitalization.
• Mild pain or blood in urine for a few days is normal; severe symptoms require immediate attention.
• Temporary ureteral stents may be used and removed after a short period.
• Follow-up imaging ensures complete stone clearance.

Preventing future stones

• Stay well hydrated — aim for pale, dilute urine.
• Moderate salt and animal protein intake.
• Maintain normal calcium intake unless advised otherwise.
• Limit excessive oxalate-rich foods if needed.
• Undergo stone analysis and metabolic evaluation for tailored treatment.
• Regular follow-ups with your urologist.

When to see a urologist — and why early care matters

If you experience sudden severe flank pain, visible blood in urine, fever, or difficulty passing urine, consult a urologist immediately. Early diagnosis and minimally invasive treatments reduce complications and protect kidney function. As a specialist in endourology and renal transplant, Dr. Anurag Chatterjee provides advanced, personalized care for all types of kidney stones.

Disclaimer

This article provides general information and does not replace personalized medical advice. For diagnosis, treatment and follow-up, consult a qualified urologist.