초록 ▼

A mask for relative analgesia and anaesthesia is moulded from polymeric foam and fits over the nose of the patient, with lateral ports for inlet and outlet of gases. The periphery of the mask has a lower region which bears upon the base of the upper lip, an upper region which contacts the nasal bone

A mask for relative analgesia and anaesthesia is moulded from polymeric foam and fits over the nose of the patient, with lateral ports for inlet and outlet of gases. The periphery of the mask has a lower region which bears upon the base of the upper lip, an upper region which contacts the nasal bones, and lateral regions which contact the nasal processes of the maxilla and the maxilla itself and meeet the lower region at the points where the base of the upper lip meets the naso-labial grooves. Certain parts of the face-contacting surfaces are inwardly chamfered.

대표청구항 ▼

A component for an anaesthesia mask comprising a relatively thick-walled resiliently compressible polymeric foam moulding having an opening to receive the nose of the patient, the opening being bounded by face-contacting surfaces of substantial width, lateral ports being provided in the sides of the

A component for an anaesthesia mask comprising a relatively thick-walled resiliently compressible polymeric foam moulding having an opening to receive the nose of the patient, the opening being bounded by face-contacting surfaces of substantial width, lateral ports being provided in the sides of the foam moulding for the inlet and outlet of gases, the region of the foam moulding forming the periphery of the mask around the opening being resiliently compressible and shaped so as to have a lower region adapted to bear upon the base of the upper lip, an upper region adapted to contact the inferior region of the nasal bones, and lateral regions joining the upper and lower regions, the lateral regions being shaped so as to contact the nasal processes of the maxilla and the maxilla itself, and to meet the lower region where the lateral aspects of the upper lip meet the nasolabial grooves so that portions of the face-contacting surfaces extend at least over said naso-labial grooves, said face-contacting surfaces being shaped to provide a squashable seal around said periphery and thus in the region of said naso-labial grooves, the face-contacting surfaces which contact the inferior and lateral surfaces of the nasal bones and the maxilla on either side of the nose being chamfered inwardly with respect to the interior of the mask.