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