A physician reported that on (b)(6) 2020, the (b)(6) male patient has csf retention and the certas valve was broken: the valve was implanted via l-p shunt on (b)(6) 2020 with setting 6.There were no clinical symptoms of hydrocephalus and the patient was discharged; however, on (b)(6) 2020, the patient went to the hospital because of csf retention on his back and no clinical signs of hydrocephalus were noted.It was found that the valve was broken by ct image.Therefore, on (b)(6) 2020, the valve was replaced with a new one.
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