CSF occult blood test

Add 2~3 drops of 204.7mmol/L (5%) benzidine acetic acid solution to clean test tube, then add 1-2 drops of glacial acetic acid, add 0.2~0.4ml of cerebrospinal fluid, mix well, add 881.8mmol/L (3% ) 0.5 ml of hydrogen peroxide solution, if it turns blue positive, it means that there is subarachnoid hemorrhage or cerebral hemorrhage at least 2 hours before; if it does not change color, it is negative. Basic Information Specialist classification: examination classification: cerebrospinal fluid examination Applicable gender: whether men and women apply fasting: fasting Analysis results: Below normal: Normal value: no Above normal: negative: normal. Positive: Old bleeding (hemorrhagic meningitis and traumatic meningitis is meaningless in this trial). Tips: Long-term use of vitamin C can make the occult blood test false negative. Normal value negative. Clinical significance Positive: old bleeding (hemorrhagic meningitis and traumatic meningitis do not make this test). Positive results may be diseases: precautions for hypertensive cerebral hemorrhage Long-term use of vitamin C can make the occult blood test false negative. Inspection process Take a small amount of cerebrospinal fluid on the filter paper, add 2 to 3 drops of o-toluidine reagent to the cerebrospinal fluid, add 2 to 3 drops of hydrogen peroxide solution, and observe the results immediately. If it is blue, it is positive. Not suitable for the crowd 1. If there is obvious papilledema or cerebral palsy, contraindications are contraindicated. 2. Patients who are in shock, exhaustion or endangered state and local skin inflammation, and lesions in the posterior cranial fossa are contraindicated. Adverse reactions and risks If the patient has symptoms such as breathing, pulse, or abnormal color during puncture, stop the operation immediately and deal with it accordingly.