flˈʌʃɪŋ wɪð sˈeɪliːn ʃˌʊd biː pˈeɪnləs ɪf ðə kˈænjʊlə ɪz ɪn ɪts pɹˈɑːpɚ plˈeɪs, ɔːlðˈoʊ ɪf ðə sˈeɪliːn ɪz nˌɑːt wˈɔːɹmd ðɛɹ mˈeɪ biː ɐ kˈoʊld sɛnsˈeɪʃən ɹˈʌnɪŋ ˌʌp ðə vˈeɪn.
Flushing with saline should be painless if the cannula is in its proper place, although if the saline is not warmed there may be a cold sensation running up the vein.