Journals / Türk Nöroloji Dergisi / 2021 / Cilt: 27 - Sayı: 1

Effects of Body Temperature Lowering on Visual Evoked Potentials in Patients with Multiple Sclerosis

Multipl Sklerozlu Hastalarda Vücut Sıcaklığındaki Düşüşün Görsel Uyarılmış Potansiyeller İncelemelerine Etkisi

Pages
34–40
Publication Date
2022-11-06
DOI
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AI Summary & Key Takeaways

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⚡ TL;DR(Too Long; Didn't Read)

Results: After the cooling process, P100 latency significantly shortened at the 1st, 6th and 24th hours (p

📌 3 Key Takeaways

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Objective & Hypothesis:Objective: Aggravation of neurologic symptoms in patients with multiple sclerosis (MS) due to heating is well known.
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Key Findings & Data:Body cooling was achieved using a “Medivance Arctic Sun Temperature Management System” and the body temperature was decreased by about 1 °C.
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Conclusion & Impact:Results: After the cooling process, P100 latency significantly shortened at the 1st, 6th and 24th hours (p
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

Objective: Aggravation of neurologic symptoms in patients with multiple sclerosis (MS) due to heating is well known. This phenomenon, known as Uhthoff phenomenon (UP), is explained by transient conduction block in demyelinated nerve fibers and transected axons. The threshold of conduction block dependent on temperature is probably proportional to the degree of demyelination or axonal injury. On the other hand, about half of all patients reported improvement in a cold bath (anti-UP effect). This study aimed to assess the effects of body cooling on clinical parameters [neuro-opthalmologic examination and contrast sensitivity in visual acuity/Sloan letter test, and the Expanded Disability Status Scale (EDSS)] and electrophysiologic measurements [visual evoked potentials (VEP)] in patients with MS previously clinically affected by optic neuritis. Materials and Methods: Twenty patients who described a UP or anti-UP effect with definite MS according to the McDonald and Poser criteria were enrolled in the study. Before the cooling process, all patients with a history of optic neuritis (at least once) were examined clinically, neurologically and neuro-ophthalmologically, and electrophysiologically. Body cooling was achieved using a “Medivance Arctic Sun Temperature Management System” and the body temperature was decreased by about 1 °C. After that, all patients were re-evaluated clinically and electrophysiologically. Results: After the cooling process, P100 latency significantly shortened at the 1st, 6th and 24th hours (p

Özet

Amaç: Multipl sklerozlu (MS) hastalarda sıcaklık artışı ile nörolojik semptomlarda kötüleşme iyi bilinen bir özelliktir. Uhthoff fenomeni (UF) olarak bilinen bu fenomen, demiyelinize sinir liflerinde ve aksonlarda oluşan geçici iletim bloğu ile açıklanmaktadır. Sıcaklığa bağlı iletim bloğu eşiği muhtemelen demiyelinizasyon veya aksonal yaralanma derecesi ile orantılıdır. Öte yandan, hastaların yaklaşık yarısı soğuk bir banyo ile iyileşme bildirmiştir (anti-UF etkisi). Bu çalışma, optik nevrit atağı geçirmiş olan multipl sklerozlu hastalarda vücut sıcaklığındaki azalmanın klinik parametreler [nöro-oftalmolojik muayene ve kontrast duyarlılık/ Sloan mektup testi ve Genişletilmiş Özürlülük Durum Ölçeği (EDSS)] ve elektrofizyolojik ölçümler [görsel uyarılmış potansiyeller (VEP)] üzerindeki etkilerini değerlendirmeyi amaçlamaktadır. Gereç ve Yöntem: McDonald ve Poser kriterlerine göre kesin MS tanısı almış UF veya anti-UF etkisi tarif eden 20 hasta çalışmaya dahil edildi. Soğutma işleminden önce optik nörit öyküsü olan tüm hastaların nörolojik, nöro-oftalmolojik muayeneleri ve elektrofizyolojik incelemeleri yapıldı. “Medivance Arctic Sun Temperature Management System” kullanılarak vücut sıcaklığı yaklaşık 1 °C düşürüldü. Soğutma işlemi sonrasında tüm hastalar klinik ve elektrofizyolojik olarak tekrar değerlendirildi. Bulgular: Soğutma işleminden sonra, 1., 6. ve 24. saatlerde değerlendirilen P100 latansları işlem öncesine göre anlamlı olarak azaldı (p

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Cite This Article

KESKİN, A. O., KARAOĞLAN, L. İ., İDİMAN, E., POYRAZ, T., İDİMAN, F. (2022). Effects of Body Temperature Lowering on Visual Evoked Potentials in Patients with Multiple Sclerosis. Türk Nöroloji Dergisi, Cilt: 27 - Sayı: 1, 34–40. https://ajindex.com/articles/636550

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