This rigid fiberoptic laryngoscope allows visualization of the glottis even when there is an inability to align the oral, pharyngeal, and laryngeal axes, perhaps because the patient has limited flexion/extension. In one study the Bullard laryngoscope caused less head extension and cervical spine extension than conventional laryngoscopes and resulted in a better view, suggesting that it may be useful in care of patients in whom cervical spine movement is limited or undesirable (Anesthesiology 1995;82:859).
Cohn AI, Hart RT, McGraw SR, Blass NH. The Bullard laryngoscope for emergency airway management in a morbidly obese parturient. Anesth Analg. 1995 Oct;81(4):872-3.