Have you tried the warm compress trick for difficult IV placements?
This Pearl of Practice offers advice for how to handle cephalic veins.
Obtaining vascular access can be difficult in shocky patients with poor perfusion. Apply a warm compress to the vessel can help the vein stand up to improve visualization. Also, flushing the IVC before insertion helps you see the flash when BP is low.
Colleen Manthe, RVT, and Julia Morrow, RVT
Blue Pearl Veterinary Partners
Overland Park, Kansas