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Prethymectomy plasmapheresis in myasthenia gravis
Jiann-Horng Yeh1, Wei-Hung Chen, Ker-Ming Huang
1Department of Neurology, Shin Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan.
Journal of Clinical Apheresis
|July 22, 2005
Summary
Prethymectomy plasmapheresis, using double filtration plasmapheresis (DFP), effectively reduced mechanical ventilation time and intensive care unit (ICU) stay for myasthenia gravis (MG) patients undergoing thymectomy. Higher acetylcholine receptor antibody (AchRAb) removal rates correlated with shorter ICU and hospital stays.
Area of Science:
- Neurology
- Immunology
- Surgical Preparation
Background:
- Myasthenia gravis (MG) is an autoimmune disorder affecting neuromuscular transmission.
- Thymectomy is a common treatment for MG, but postoperative recovery can be prolonged.
- Preoperative interventions aim to optimize patient condition for surgery and improve outcomes.
Purpose of the Study:
- To evaluate the efficacy and safety of prethymectomy double filtration plasmapheresis (DFP) in patients with myasthenia gravis.
- To assess the impact of DFP on postoperative outcomes, including mechanical ventilation duration, ICU stay, and hospital stay.
Main Methods:
- Twenty-nine myasthenic patients underwent DFP sessions before transsternal thymectomy.
- Measurements included acetylcholine receptor antibody (AchRAb) titers, vital capacity (VC), and maximal inspiratory pressure (Pimax) before and after DFP.
- Postoperative hospital stay, ICU stay, and mechanical ventilation duration were analyzed.
Main Results:
- Higher AchRAb removal rates were associated with shorter ICU and postoperative hospital stays (P = 0.001 and 0.019).
- Postoperative hospital stay correlated with post-DFP Pimax (P = 0.010) and pre-DFP VC (P = 0.047).
- AchRAb removal <30% and pre-DFP Pimax <-60 cmH2O were linked to prolonged ICU stay.
Conclusions:
- DFP is an effective and safe method for preparing myasthenia gravis patients for thymectomy.
- Optimizing AchRAb levels and respiratory muscle strength (Pimax, VC) preoperatively can improve postoperative recovery.
- This preparation strategy may reduce mechanical ventilation and ICU/hospitalization durations.