Northfield's only product was PolyHeme, an oxygen-carrying blood substitute, which failed to receive Food and Drug Administration (FDA) regulatory approval.
nˈɔːɹθfiːldz ˈoʊnli pɹˈɑːdʌkt wʌz pˈɑːli hˈiːm, ɐn ˈɑːksɪdʒəŋkˈæɹiɪŋ blˈʌd sˈʌbstɪtˌuːt, wˌɪtʃ fˈeɪld tə ɹᵻsˈiːv fˈuːd ænd dɹˈʌɡ ɐdmˌɪnɪstɹˈeɪʃən ˌɛfdˌiːˈeɪ ɹˈɛɡjʊlətˌoːɹi ɐpɹˈuːvəl.