If the blockage of brainstem vessels is treated timely, some patients can be completely unblocked, and the blood clots in the vessels can be dissolved without any neurological deficit symptoms remaining. The blockage of brainstem vessels belongs to posterior circulation infarction, and patients will show symptoms such as dizziness, nausea, vomiting, inflexible limb movement, numbness, double shadow when looking at things or choking on drinking water. By doing magnetic resonance imaging and functional brain imaging, the infarct site of the patient can be clarified. If it is within 6 hours of the onset, the blocked blood vessel can be unblocked by intravenous thrombolysis, which can be performed with RTPA and urokinase. If the patient has been seen for more than 6 hours, the blockage of the brainstem vessels cannot be completely unblocked, but the blocked vessels can be made to establish collateral circulation through the use of drugs to improve the symptoms of neurological deficits.