Oropharyngeal airway and bite block assembly and method of use for closed pulmonary ventilation

Claim 1

A combination oropharyngeal airway and bite block assembly for use in providing closed pulmonary ventilation of a patient, comprising: (a) an oropharyngeal airway tube having means defining a curved tubular posterior portion, for introduction through the mouth into the upper throat of a patient, a tubular anterior portion connected to said posterior portion and tubular connector means connected to said anterior portion for detachably and sealingly connecting said airway tube to a closed ventilation apparatus; (b) a U-shaped bite block in engagement with said airway tube for preventing occlusion of the airway tube when the assembly is inserted in the patient's mouth, said bite block having a central aperture, said airway tube and said aperture having frictionally mating surface means for permitting said airway tube and said aperture to frictionally and sealingly engage one another in a plurality of positions along the length of said airway tube, thereby permitting slidable adjustment of said airway tube with respect to said bite block; (c) positioning stop means located on said anterior portion of said airway tube for limiting rearward motion of said airway tube within said aperture of said bite block; and (d) detent means including a plurality of generally hemispherical protrusions located on said posterior portion of said airway tube, the distance between said forward stop means and detent means being greater than the thickness of said bite block from front to back along said central aperture, whereby said detent means limits the forward movement of said airway tube within said aperture of said bite block.