EP0845276A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Laryngeal mask airways
Assignee: Smiths Group PLC
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Filing: 1997-10-23
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Granted: —
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Expires: 2017-10-23
Abstract
Abstract A laryngeal mask assembly has a mask portion 13 of elliptical shape formed by a mount 15 and an inflatable member 16 attached to the mount. The inflatable member 16 is formed by heat bonding together opposite walls 31 and 32 of a flat balloon 30 and at the same time cutting an aperture 26 through the walls, so as to form a central web 25 within an outer inflatable ring 24. The central web 25 is attached to a concave surface 19 on the forward surface of the mount 15 with the aperture 26 in the web aligned with an opening 22 in the mount.
Inventors
- 👤 Simon Neame
- 👤 Eric Pagan
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 15:22
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/04; A61M16/0402; A61M16/0409; A61M16/0434; A61M16/0445
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
157 words
A laryngeal mask assembly including a mask portion (13) and an elongate tube (1)
that opens at its forward, patient end (14) into the mask portion, the mask portion (13)
being adapted during use to locate in the hypopharynx and to open on its forward side
to the patient's airway, characterised in that the mask portion (13) has a generally
elliptical mount member (15) attached with the patient end (14) of the tube (1), that
the tube (1) opens at the patient end of the assembly via an opening (22) on the
forward surface (19) of the mount member (15), that the mask portion (13) has an
expandable member (16) comprising an expandable ring (24) and a central web (25)
extending within the ring, and that the web (25) is attached to the forward surface (19)
of the mount member (15) and has an aperture (26) therein aligned with the opening
(22) in the mount member (15).
Claim 2
Dependent Claim
22 words
A laryngeal mask assembly according to Claim 1, characterised in that the forward
surface (19) of the mount member (15) is concave.
Claim 3
Dependent Claim
26 words
A laryngeal mask assembly according to Claim 1 or 2, characterised in that the ring
(24) projects beyond the outer perimeter of the mount member (15).
Claim 4
Independent Claim
119 words
A method of manufacture of a laryngeal mask assembly of the kind including a mask
portion (13) and an elongate tube (1) that opens at its forward, patient end into the
mask portion, the mask portion (13) being adapted during use to locate in the
hypopharynx and to open on its forward side to the patient's airway, characterised in
that the method includes the steps of providing a mount member (15) at the patient
end (14) of the tube (1), forming an expandable member (16) comprising an
expandable ring (24) and a web (25) within the ring, and attaching the web (25) to the
mount member (15) so as to secure the expandable member (16) with the mount
member.
Claim 5
Dependent Claim
61 words
A method according to Claim 4, characterised in that the expandable member (16) is
formed by providing an expandable balloon (30) and joining opposite walls (31 and
32) of the balloon together in a central region such that the region where the walls are
joined together provides the web (25) and the remainder of the balloon provides the
expandable ring (24).
Claim 6
Dependent Claim
25 words
A method according to Claim 5, characterised in that the opposite walls (31 and 32) of
the balloon (30) are joined together by heat sealing.
Claim 7
Dependent Claim
51 words
A method according to Claim 5 or 6, characterised in that the opposite walls (31 and
32) are joined together using a die (34, 35) on opposite sides of the balloon (30), and
that the dies are provided with cutting formations (36) to form an aperture (26)
through the web (25).
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