Critères pour la ventilation mécanique postopératoire après thymectomie chez des patients atteints de myasthénie grave

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Critères pour la ventilation mécanique postopératoire après thymectomie chez des patients atteints de myasthénie grave

Message par Pboulanger » 11 déc. 2017 10:06

:hi:

:arrow: Lu sur :https://www.ncbi.nlm.nih.gov/pubmed/29221974

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Criteria for Postoperative Mechanical Ventilation After Thymectomy in Patients With Myasthenia Gravis: A Retrospective Analysis.
Chigurupati K1, Gadhinglajkar S2, Sreedhar R3, Nair M4, Unnikrishnan M5, Pillai M1
J Cardiothorac Vasc Anesth. 2017 Jun 27. pii: S1053-0770(17)30642-0. doi: 10.1053/j.jvca.2017.06.045.


Abstract
  • OBJECTIVE:

    To determine the criteria for postoperative mechanical ventilation after thymectomy in patients with Myasthenia Gravis.
  • DESIGN:

    Retrospective study.
  • SETTING:

    Teritiary care centre.
  • PARTICIPANTS:

    77 Myasthenia gravis patients operated for thymectomy were studied.
  • INTERVENTIONS:

    After obtaining clearance from Institutional ethics committee, medical records of 77 patients with MG, who were operated for thymectomy between January 2005 and December 2015 were reviewed in a retrospective manner. Perioperative variables collected from the patient records were demographic data, duration of the disease, Osserman and Genkin classification, Anti-acetylcholine antibody (AChR) positivity, preoperative daily dose of drug, history of preoperative myasthenic crisis, preoperative vital capacity, technique of anesthesia, drugs used for anesthesia, perioperative complications, and duration of postoperative mechanical ventilation. The patients were divided into two groups, group I and group II consisting of those who required postoperative ventilation for < 300 minutes and > 300 minutes, respectively. The determinants of prolonged postoperative ventilation were studied.
  • MEASUREMENTS AND MAIN RESULTS:

    The requirement of mechanical ventilation was higher in patients with higher Osserman's grade of myasthenia gravis. Duration of the disease had no effect on the duration of mechanical ventilation in myasthenic patients post thymectomy (p = 0.89). The patients with a preoperative history of myasthenic crisis had a requirement for prolonged mechanical ventilation (p=0.03). Patients with preoperative vital capacity < 2.9 litres and preoperative CT scan showing thymoma had a requirement for prolonged mechanical ventilation with p values < 0.001 and 0.035, respectively. Patients who showed positivity for anti-acetylcholine antibodies had a prolonged mechanical ventilation (p=0.026). Preoperative dose of pyridostigmine and the choice of continuation or discontinuation of antcholinesterases on the day of surgery had no influence on the duration of mechanical ventilation (p value of 0.19 and 0.36 respectively). Epidural analgesia intra and postoperatively significantly reduced the requirement of mechanical ventilation (p=0.006).
  • CONCLUSION:

    The predictors of postoperative ventilation in myasthenic patients undergoing thymectomy as per our study are: 1. Grade of myasthenia; 2. History of preoperative myasthenic crisis; 3. Anti-acetylcholine antibodies positivity; 4. Presence of thymoma; and 5. a vital capacity < 2.9 litres. Use of thoracic epidural as a part of combined anesthetic technique helps to reduce the need of mechanical ventilation in these patients.
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Message de : Pboulanger  un membre de l'équipe technique
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