Abstract: A light coupling assembly for use in providing light for illuminating an area of a patient's anatomy during the use of a medical instrument such as, for example, a laryngoscope is disclosed herein. The light coupling assembly includes a first light conveyance member having an input end for receiving light and an output end cooperating with the instrument in a way which illuminates the area with the light. A second light conveyance member includes an input end and an output end. The input end of the second member is positioned in optical communication with a source of light which also generates heat. A coupling arrangement is connected with the first and second members for positioning the input end of the first member in thermally isolated optical communication with the output end of the second member such that light from the first member is initially coupled to the second member in a way which prevents heat produced by the light source from damaging the first member.

Abstract: A laryngoscope handle forming part of an overall laryngoscope is disclosed herein having a hollow, elongated hand gripping portion designed to contain an electrical power supply, specifically batteries, within its interior. The handle also includes a blade connecting head portion disengagably connected to one end of the hand gripping portion and a number of passageways for accommodating a light source and electrical contacts which are necessary in the operation of the overall laryngoscope. The elongated hand gripping portion itself is sealed sufficient to prevent water from reaching its interior and damaging the power supply therein. One way of forming part of this seal is a particular arrangement including a printed circuit board for sealing the entire lower end of the blade connecting head portion including its multiple passageways so as to prevent any water entering the passageways from reaching the power supply containing the interior of the hand gripping portion.