Abstract: The instrument (1) suitable for an MRI environment consists of an electrical power source (2) and other MR safe class elements and the electrical power source (2) includes, and, in particular, is made up of, one or more MR safe, non-magnetic electric batteries (5). This instrument (1) is, in particular, a lighted, disposable laryngoscope that consists of a part that is disposable after use that forms a tongue-depressor blade (3) and a tubular handle (4) that contains a plurality of MR safe, non-magnetic electric batteries (5).

Abstract: According to the present invention, the light source (7) is elastically mounted on the electric housing (5) and it can be pushed back by the projecting proximal end (4P) of the light conduit, when said housing is inserted into the disposable handle (3). As a result of being pushed back, the light source (7) actuates a microswitch (8) which enables it to be powered from a power source (6).

Abstract: According to the present invention, the light source (7) is elastically mounted on the electric housing (5) and it can be pushed back by the projecting proximal end (4P) of the light conduit, when said housing is inserted into the disposable handle (3). As a result of being pushed back, the light source (7) actuates a microswitch (8) which enables it to be powered from a power source (6).