Final answer:
A surgical technologist should have a suction drain available for a procedure repairing a gunshot wound to the chest, as it helps reestablish necessary negative pressure in the chest cavity for lung expansion.
Step-by-step explanation:
The question asks which type of drain a surgical technologist should have available when repairing damage from a gunshot wound to the chest. Given that suction is used to reestablish negative pressure and inflate the lungs after chest surgery or trauma, the surgical technologist should have a suction drain ready to use at the end of the procedure. Suction drains work by applying negative pressure to the chest cavity, which assists in removing air, blood, or other fluids, helping to restore the natural negative pressure needed for lung expansion.