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Related Experiment Videos

[Inhalation anesthesia in porphyria variegata].

M Lobo1, V Guimil, C Solís

  • 1Servicio de Anestesiología, Reanimación y Terapia del Dolor y Bioquímica Clínica, Hospital La Paz, Universidad Autónoma de Madrid.

Revista Espanola De Anestesiologia Y Reanimacion
|November 1, 1992
PubMed
Summary

This study details anesthesia for a patient with variegate porphyria undergoing mastectomy. Inhalation anesthesia proved advantageous, with increased uroporphyrins observed post-surgery.

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Area of Science:

  • Anesthesiology
  • Biochemistry
  • Genetics

Background:

  • Variegate porphyria (VP) is a rare genetic disorder characterized by a biochemical defect leading to the accumulation of porphyrins.
  • Patients with VP can experience acute attacks triggered by certain drugs, stress, or fasting, manifesting with neurological and/or abdominal symptoms.
  • Anesthetic management in VP patients requires careful selection of agents to avoid exacerbating the condition.

Observation:

  • A 38-year-old woman with a history of VP, diagnosed in 1984 due to biochemical and enzymatic deficits, presented with photosensitivity.
  • She had a prior uneventful general anesthesia in 1982.
  • The patient underwent a partial right mastectomy.

Findings:

  • The anesthetic technique involved intramuscular premedication (scopolamine, dihydrobenzperidol, fentanyl), intravenous induction (diazepam, dihydrobenzperidol, fentanyl, etomidate, atropine, suxamethonium), and maintenance with isoflurane, oxygen, and nitrous oxide.

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  • Atracurium was used for neuromuscular blockade.
  • Post-surgery urine analysis revealed a significant increase in uroporphyrins, though less pronounced during the procedure, potentially due to hemodilution.

    • Implications:

    • Inhalation anesthesia, specifically using isoflurane, appears to be a safe and advantageous option for patients with variegate porphyria.
    • Careful selection of anesthetic agents is crucial to prevent triggering porphyric attacks.
    • Monitoring porphyrin levels post-operatively can provide insights into the metabolic response to anesthesia and surgery in VP patients.