A surgical device consisting of a fluid mixer and blunt needle intended to be attached to a dual-barrel syringe containing fluid preparation components of an implantable nerve cap agent, to mix the components and deliver the agent to the end of an amputated peripheral nerve for capping (shielding) during surgery. The nerve cap agent is intended to create physical barrier to reduce the risk of symptomatic neuroma; the syringe and nerve cap materials are not included. This is a single-use device.