Started a long response last night but the lightning wiped it out. Quick response: Check the carton that the caths are packaged in or call the manufactures. In the old days alcohol could not be used around/on the plastic wings(haven't been dialyzing since 1991-know much has changed-started in 1974- saw may first hemodialysis in l967) Proper care of the cath is paramont to its longevity and to the patient's well-being. Hope you can get involved with the ANNA(American Nephrolgy Nurses Asso). May you have a happy and reward filled nursing carreer.