SurgiVet Central Venous Peel-Off Sheath Catheter Sets. Central venous catheter introduced using a peel-off sheathed needle. The peel-off sheath pre-loaded on the access needle allows percutaneous introduction of the venous catheter, following direct venipuncture and removal of the needle cannula. After positioning the catheter, the sheath is peeled away. Each set consists of polyethylene catheter, matched flexible obturator, peel-off sheath needle and syringe. Sizes available: CVP308 3Fr, CVP4010 4Fr or CVP5015 5Fr.