صلاحية فحوصات الفسلجة العصبية بتنبؤ شدة متلاكمة غوليان باري وباستحقاق التنفس الاصطناعي == Validity of neurophysiological study in prediction of severity of Guillain - Barre syndrome and the indication for mechanical ventilation
Author name:
بلال صادق عبد الباقي
Supervisor name:
نجیب حسن محمد | زكي نوح حسن
General topic:
Medicine
Specific topic:
Neurophysiology
Degree:
Master
University:
University of Baghdad - Faculty Of Medicine
Language:
English
University location:
Baghdad
First pages:
19T1650 - p.pdf
Abstract:
Guillain - Barre syndrome is an acute monophasic, non - febrile postinfectious illness manifesting as ascending weakness, and areflexia.However, sensory, autonomic and brainstem abnormalities may also seen. It is one of the most common causes of acute motor paralysis. In addition to the clinical presentation, those patients may develop neurophysiological features suggestive of demyelinating neuropathy.However, an axonal form had been reported. Hence, the importance of electrophysiological study; nerve conduction study (NCS) and electromyography (EMG) in the neurological evaluation of the severity of Guillain - Barre syndrome and the indication for mechanical ventilation.This study aimed to evaluate the neurophysiological study in prediction the severity of GBS, assess the usefulness of neurophysiology in prediction of respiratory muscles involvement and find out whether the neurophysiological study of peripheral nerves can predict the indications of mechanical ventilation.Two groups of patients are involved in this study. 22 Patients with GBS in the neuromedical wards and 18 patients in the respiratory care units (RCU).The mean age of the two groups were (47+\ - 24 years) with female predominance (1.22 : 1).Each patient submitted to brief medical history, clinical examination and neurophysiological study. This study was conducted at the neuromedical wards and RCU departments of Hospital of neurosciences, Baghdad and ALyarmuk teaching hospitals in a period from December 2017 to June 2018.The neurophysiological assessments involve the following tests : 1. Sensory NCS of bilateral median, ulnar and sural nerves involve sensory latency and sensory nerve action potential (SNAP). 2. Motor NCS of bilateral median, ulnar, common peroneal and tibial nerves involve the motor latency, compound motor action potential (CMAP), motor nerve conduction velocity (MNCV), conductions block and temporal dispersion.3. Minimal F wave latency of bilateral median, ulnar, common peroneal and tibial nerves.4. Needle EMG for bilateral proximal and distal muscles of upper (first dorsal interosseous) and lower limbs (tibialis anterior and extensor digitorium brevis) in which insertional activity, spontaneous activity, motor unit action potential MUAP and interference pattern were applied.The results of this study reveal that F wave and distal motor latencies of the left median, left ulnar, left peroneal, left tibial, right ulnar, right peroneal and right tibial nerves are significantly different between studied groups. Where there are prolonged latencies which could be considered as an indicator for admission to the RCU.Moreover, the reduced compound motor action potential (CMAP) and decrease conductive velocity (CV) in nearly all nerves are significantly different between studied groups and can also increase the chance for admission to the RCU.Concerning sensory abnormalities recorded in this study there are a reduced sensory nerve action potential of left median nerve or a prolonged left ulnar sensory latency when compared to the right ulnar and median sensory study and also increase the risk for admission to the RCU. Interestingly, what was noticed in this study, there are asymmetrical findings in nerve conductive parameters of the same patient involving not only the motor nerves rather than the sensory nerves too.This study concluded that the neurophysiological study can predict the severity of Guillain - Barre syndrome mainly the prolongation of F wave and motor latencies. The peripheral neurophysiological findings are useful in prediction of respiratory muscles involvement by GBS depending on CMAP and conductive velocity. There are asymmetrical finding changes in the studied neurophysiological parameters more apparently involving the sensory nerves of the same patients. Extremes of an age (<30yrs and >50yrs) represent a risk factor if not an indicator for RCU admission.
