2023年11月8日 星期三

Toluene Poisoning / Intoxication

 Substance

 Toluene

 

Common name or Trade name 

 C₆H₅CH₃

 C7H8

 甲苯: 汽車排放的廢氣, 油漆、油漆稀釋劑、指甲油、噴漆及黏著劑 possibly contains甲苯

 Route: inhalation of fumes, ingestion, or transdermal absorption [1, 2]

 Exposure: 77% were male and mean age was 23.5 years [3]

 

Involving system

 CNS: marked atrophy of the lower cervical spinal cord, thoracic spinal cord, and conus medullaris. [4]

     Reversible symmetrical white matter changes [ 5]

 Lung: aspiration pneumonitis. [2]

 CV system: potential arrhythmogenic effect of endogenous catecholamines, occasionally resulting in fatality.[6]

 Kidney: Renal glomerular injury (proteinuria) renal tubular acidosis[2]

 Muscle: Rhabdomyolysis occurred in 80% of patients, probably due to hypokalemia and hypophosphatemia [3, 7]

 Cardiopulmonary failure [1]

 The cause of death was in all cases due to cardiac rhythm abnormalities. [7]

 

Presentation

   Chronic: mild cognitive impairment, hearing impairment, dysarthria, marked hyperreflexia of the limbs, spastic paraplegia, slight impairment of deep sensation, and urinary disturbance. 4 stimulus-sensitive spinal myoclonus [8]

   Acute: Severe hypokalemia and acidosis.

  . Biliary tract injury (alkaline phosphatase and gamma-glutamyl transpeptidase elevations) disproportional to hepatocellular injury is common.

Altered mental status, severe acidosis, hypokalemia and acute oliguric renal failure. [3, 7]

Symptomatic hypokalemia [2]

Adrenal insufficiency secondary to bilateral adrenal hemorrhage [9]

 

Antidote and Treatment

  No antidote

  Standardly supportive treatment

 

Disposition

    If asymptomatic, observe 6 hours, and discharge when the CXR is unremarkable.[2]

Poor in patients who have altered mental status, renal failure, severe acidemia and female gender, and patients with these characteristics should be considered to be treated in an intensive care unit. [7]

 

References

 

 [1]https://pubmed.ncbi.nlm.nih.gov/24164003/

[2]. Goldfrank’s toxicologic emergencies. 11th ed. P. 1415~1417

[3].https://pubmed.ncbi.nlm.nih.gov/22642292/

 [4]https://pubmed.ncbi.nlm.nih.gov/32238742/

[5].https://pubmed.ncbi.nlm.nih.gov/25117062/

[6]. https://pubmed.ncbi.nlm.nih.gov/9140324/

[7].https://pubmed.ncbi.nlm.nih.gov/26282250/

   [8]https://pubmed.ncbi.nlm.nih.gov/10845207/

[9]https://pubmed.ncbi.nlm.nih.gov/9711204/

 

Edited by Yu-Jang Su   Nov 8, 2023

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