Syringe for fluorescein fundus angiography

Two syringes should be prepared, one for injecting fluorescein sodium stock solution and the other for injecting fluorescein sodium diluent. The two syringes can be switched by using the three-way switch or replacing the syringe. It is best to choose No.8 scalp needle. Too small a needle will affect the rapid injection of contrast media. The scalp needle is connected with the syringe in a soft way, which can avoid the patient's fatigue and arm movement caused by long time, and the needle tip shifts in the vein.