Podvinec M, Pfaltz C R, Skorpil V
HNO. 1976 May;24(5):161-5.
The present study is based upon the results of repeated electrodiagnostic tests carried out in a series of 100 cases of Bell's palsy (Determination of Rheobase and Chronaxy). The first symptoms of denervation can be observed during the second week after the onset of the paralysis. This seems to be the critical period in which the ultimate consequences of the lesion are determined: partial or total recovery or complete irreversible denervation. In cases showing a rapid increase of chronaxy during the 2nd week, prognosis is rather poor because a difference of 240% between the affected and the normal side indicates a progressive denervation. Cases in which the difference of chronaxy values during the 2nd week is increased upto 240% (i.e. partial denervation) recover incompletely in 15% of the cases. Estimation of prognosis in Bell's palsy and timing of a facial nerve decompression must be based on reliable facts, such as the results of repeated electrodiagnostic tests (modified measurement of Rheobase and Chronaxy) carried out at least every secont but preferably every day during the first 3 weeks after the onset of the paresis.
本研究基于对100例贝尔麻痹患者进行的重复电诊断测试结果（基强度和时值测定）。失神经支配的最初症状可在麻痹发作后的第二周观察到。这似乎是决定病变最终后果的关键时期：部分或完全恢复或完全不可逆的失神经支配。在第二周时值迅速增加的病例中，预后相当差，因为患侧与正常侧之间240%的差异表明失神经支配在进展。第二周时值差异增加至240%（即部分失神经支配）的病例中，15%的患者恢复不完全。贝尔麻痹的预后评估和面神经减压的时机必须基于可靠的事实，例如在麻痹发作后的前三周至少每两天但最好每天进行的重复电诊断测试结果（改良的基强度和时值测量）。
