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Related Concept Videos

Urinary Tract Calculi I: Introduction01:28

Urinary Tract Calculi I: Introduction

Renal calculi, or kidney stones, are solid deposits of minerals and salts formed inside the kidneys. In medical terminology, "calculus" refers to the stone itself, while "lithiasis" describes the process of stone formation. Depending on their location within the urinary system, these stones may be classified as either urolithiasis, when situated within the urinary tract, or nephrolithiasis, when located within the kidneys. Each term signifies the specific impact of the stone.Predisposition...
Urinary Tract Calculi II: Pathophysiology and Clinical Manifestations01:26

Urinary Tract Calculi II: Pathophysiology and Clinical Manifestations

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...
Urinary Tract Calculi III: Medical Management01:30

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 V: Nursing Management01:28

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 VI: Surgical Management01:25

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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...
Increased Intracranial Pressure l: Introduction01:14

Increased Intracranial Pressure l: Introduction

Intracranial hypertension is a sustained elevation of intracranial pressure (ICP) above 22 mm Hg. In supine adults, normal ICP is ~7–15 mm Hg.The rigid, nonexpandable cranium contains three components—brain tissue, blood, and cerebrospinal fluid (CSF)—that total ~1,700 mL in a typical adult: 1,400 mL brain (~80%), 150 mL blood (~10%), and 150 mL CSF (~10%). According to the Monro–Kellie doctrine, total intracranial volume is effectively fixed. When one component expands, CSF and venous blood...

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Acute obstructive hydrocephalus caused by a migrating intraventricular calculus. Case report

E C Tan1, T Takagi, S Matsuura

  • 1Department of Neurosurgery, Nagoya City Higashi General Hospital, Japan.

Journal of Neurosurgery
|May 1, 1993
PubMed
Summary

This case report describes a 10-year-old boy who developed acute hydrocephalus due to a moving stone-like object in his brain's fluid system. The object moved from one ventricle to another after a drainage procedure and shunt placement. The exact origin of the object was not confirmed, but it may have come from a part of the brain called the choroid plexus. The report highlights the diagnostic and management challenges of such rare cases in pediatric neurology.

Keywords:
intraventricular calculusacute hydrocephaluspediatric neurologyventricular drainage

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Area of Science:

  • Pediatric neurosurgery
  • Neurological disorders in children
  • Hydrocephalus management

Background:

Acute obstructive hydrocephalus in children is a rare but serious condition. Prior research has shown that such cases often involve blockage of cerebrospinal fluid flow. It was already known that the cerebral aqueduct is a common site for obstruction. No prior work had resolved the specific cause of obstruction in this age group. This gap motivated further investigation into unusual causes. That uncertainty drove the need for case-specific analysis. No prior work had examined migrating intraventricular calculi in pediatric patients. This paper contributes a unique clinical case to the literature.

Purpose Of The Study:

The aim of this report is to describe a rare pediatric case of acute obstructive hydrocephalus. The specific problem involves a migrating intraventricular calculus. Prior work had not fully explained the mechanism of such a condition. This case highlights the clinical presentation and progression of the disease. The motivation for this report is to raise awareness among clinicians. No prior work had documented this exact sequence of events in children. This paper seeks to clarify diagnostic and management challenges. The study emphasizes the need for careful monitoring after shunt placement.

Main Methods:

The study involved a clinical case analysis of a single pediatric patient. Diagnostic imaging was used to track the movement of the calculus. Ventricular drainage procedures were performed to relieve pressure. A right ventriculoperitoneal shunt was placed as part of treatment. The calculus's origin could not be definitively determined. The choroid plexus was considered a likely source. No invasive procedures were used to confirm the calculus's origin. The study relied on post-procedure imaging and clinical follow-up.

Main Results:

The calculus migrated from the third to the fourth ventricle after shunt placement. The obstruction occurred at the cerebral aqueduct post-drainage. The patient presented with acute hydrocephalus symptoms. The calculus was not identified as a known pathological entity. The origin remained undetermined despite imaging. The choroid plexus was proposed as a possible source. No definitive etiology was confirmed in this case. The report highlights the unpredictable nature of intraventricular calculi.

Conclusions:

The authors suggest that intraventricular calculi may originate from the choroid plexus. The case demonstrates the unpredictable movement of such calculi. No prior work had described this exact clinical progression. The study emphasizes the importance of monitoring post-shunt movement. The authors propose that such cases may be underreported in pediatric neurology. The findings suggest a need for further case documentation. No definitive treatment strategy was proposed in this report. The authors highlight the diagnostic challenges in similar cases.

The patient's hydrocephalus was caused by a migrating intraventricular calculus obstructing the cerebral aqueduct.

The movement of the calculus was observed using post-procedure diagnostic imaging.

The calculus migrated from the third to the fourth ventricle, leading to obstruction at the cerebral aqueduct after drainage.

Imaging techniques were used to track the calculus's movement and confirm the obstruction.

The origin could not be definitively determined, though the choroid plexus is a likely source.

The authors suggest that intraventricular calculi may be a rare but possible cause of acute hydrocephalus in children.