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Urinary Tract Calculi VI: Surgical Management

Urinary Tract Calculi VI: Surgical Management

Procedures for Kidney StonesMedical intervention is necessary when kidney stones or renal calculi are too large to pass spontaneously (typically greater than 5 millimeters) when stones are accompanied by symptomatic infection (such as fever or pyelonephritis), when they impair kidney function, or when they cause persistent symptoms like severe pain, nausea, or urinary retention. Additionally, patients with only one kidney or those who cannot be treated with medical management also require...

Urinary Tract Calculi V: Nursing Management

Urinary Tract Calculi V: Nursing Management

AssessmentSubjective Data: Obtain a detailed health history, including any recent or chronic urinary tract infections, periods of immobilization, previous episodes of renal calculi, and medical conditions such as gout, benign prostatic hyperplasia, or hyperparathyroidism. Review the medication history for drugs that may influence stone formation, including allopurinol, analgesics, loop diuretics, or thiazide diuretics. Document the use of long-term indwelling catheters and any past surgical...

Urinary Tract Calculi III: Medical Management

Urinary Tract Calculi III: Medical Management

The diagnosis of renal calculi involves several imaging techniques, including non-contrast CT scans and ultrasound. These methods help visualize kidney stones, assess their size and location, and detect possible obstructions. Additionally, Measuring urine pH is useful for diagnosing specific stone types, such as struvite (alkaline pH) and uric acid stones (acidic pH). Cystine stones are primarily linked to cystinuria, a genetic condition. A urinalysis helps detect blood in the urine (hematuria)...

Urinary Tract Calculi IV: Nutrition Therapy and Prevention

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Management of renal calculi focuses on effective strategies like tailored nutrition and hydration therapy. Adjusting diet and fluid intake reduces stone formation and recurrence, making these interventions simple yet powerful in kidney stone prevention and management.Understanding Kidney StonesKidney stones form when calcium, oxalate, uric acid, and cystine concentrate and crystallize in urine. Factors contributing to their formation include genetic predisposition, certain medical conditions,...

Imaging Studies V: Intravenous Urography and Retrograde Pyelography

Imaging Studies V: Intravenous Urography and Retrograde Pyelography

IntroductionIntravenous Urography (IVU) and Retrograde Pyelography (RP) are important diagnostic imaging techniques used to evaluate the urinary system. These methods help identify structural abnormalities, obstructions, and functional issues in the kidneys, ureters, and bladder. Both procedures use iodine-based contrast media to enhance the visibility of urinary tract structures on X-ray images, though they differ in their methods and indications.1. Intravenous Urography (IVU)Intravenous...

Urinary Tract Calculi II: Pathophysiology and Clinical Manifestations

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Renal calculi, commonly termed kidney stones, are crystalline solid masses that form in the kidneys but can occur at any point within the urinary system, encompassing the kidneys, ureters, bladder, and urethra.The pathophysiology of renal stones involves several key factors: supersaturation of the urine with stone-forming constituents, changes in urine pH, a decrease in urine volume, and the presence of substances that promote or inhibit stone formation.Supersaturation of Urine: This is the...

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Updated: May 23, 2026

Technical Modification of the Terminal Ureter During Total Transperitoneal Laparoscopic Nephroureterectomy for Upper Urinary Tract Urothelial Carcinoma

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Rethinking nephrolithiasis in military aviation.

Sunil B Hari¹, Michael S Morrow

¹United States Navy, Tinker AFB, OK 73145, USA. sunil.hari@navy.mil

Aviation, Space, and Environmental Medicine

|April 3, 2012

Summary

Navy regulations for kidney stones in aircrew require extensive evaluation. Current standards do not differentiate roles and prioritize stone-free status, potentially delaying return to flight duties.

Area of Science:

Aerospace Medicine
Urology
Naval Aviation

Background:

Nephrolithiasis (kidney stones) is prevalent in aviation personnel, posing risks to health and careers.
In-flight renal colic from kidney stones can have severe consequences for aircrew.
Current U.S. Navy regulations mandate thorough evaluation for aircrew with a history of kidney stones.

Observation:

This report reviews two cases of kidney stones in Naval aircrew.
Current U.S. Navy standards for aeromedical waivers for kidney stones are examined.
Policies are compared between different military services and civilian aviation authorities.

Findings:

Navy standards for aeromedical waivers for kidney stones do not distinguish between pilots and other aircrew.

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There is a strong emphasis on achieving stone-free status, even for asymptomatic or incidentally discovered kidney stones.

Existing Navy protocols differ significantly from those of other aviation authorities.

Implications:

Re-evaluation of current Navy protocols for kidney stones in aircrew is recommended.
Differentiating aircrew roles could streamline the return to flight duties for qualified personnel.
Optimizing waiver protocols may enhance operational readiness without compromising flight safety.