Volume 29, Issue 3
DOI: 10.24205/03276716.2020.744
Diagnostic Value of Blink Reflex Combined with Brainstem Auditory Evoked PotenPCSl in Posterior Circulation Ischemic Stroke
Abstract
Objective: To investigate the value of blink reflex (BR) combined with brainstem auditory evoked potenPCSl (BAEP) in the diagnosis of posterior circulation ischemic stroke (PCS) with negative DWI.
Methods: 60 PCS patients, 30 DWI negative posterior circulation ischemic stroke patients and 30 DWI positive posterior circulation ischemic stroke patients were selected from January 2017 to January 2019 in our hospital. 30 healthy people in the same period were selected as the control group. 30 patients with anterior circulation ischemic stroke were selected as the anterior circulation control group. Blink reflex and brainstem auditory evoked electrical activity were performed in the above four groups respectively. The electrophysiological indexes of 4 groups were compared.
Result: (1) The abnormal BR detection in posterior circulation ischemic stroke group showed that the latency of each wave of R1, R2 and R2'was prolonged, the amplitude was decreased or disappeared, and the latency of R1, R2, R2' in DWI negative posterior circulation ischemic stroke group and DWI positive posterior circulation ischemic stroke group were significantly longer than those in control group and anterior circulation ischemic stroke group (P < 0.01). (2) DWI negative posterior circulation ischemia. BAEP abnormalities were found in both sexually and DWI-positive posterior circulation ischemic stroke groups. Among them, 21 cases (70%) were abnormal in DWI-negative posterior circulation ischemic stroke group, which showed prolongation of PL or poor waveform differenPCStion of wave I, III and V, prolongation of IPL of wave I-III and I-V, including 5 cases of left abnormalities, 11 cases of right abnormalities and 5 cases of bilateral abnormalities, 22 cases (73%) of III-V/I-III. The ratio of IPL > 1,6 cases (20%) V/I was less than 0.5. Compared with the control group, the PL of wave I, III, V and IPL of wave III-V in the patients with posterior circulation ischemic stroke with negative DWI were prolonged (P < 0.01). (3) The positive rate of BR combined with BAEP (87%) was higher than that of BR or BAEP alone (P < 0.01). CONCLUSION: Blink reflex combined with brainstem auditory evoked potenPCSls has important reference value for early diagnosis of patients with posterior circulation ischemic stroke but negative DWI.
Keywords
posterior circulation ischemia, DWI negative; blink reflex, brainstem auditory evoked potenPCSl.