W75 Accidental suffocation and strangulation in bed
W76 Other accidental hanging and strangulation
W77 Threat to breathing due to cave-in, falling earth and other substances
W78 Inhalation of gastric contents
W79 Inhalation and ingestion of food causing obstruction of respitatory tract
W80 Inhalation and ingestion of fother objects causing obstruction of respiratory tract
W81 Confined to ro trapped in a low-oxygen environment
W83 Other specified threats to breathing
W84 Unspecified threats to breathing