System for the measurement of the content of a gas in blood, in particular the oxygen saturation of blood

System for the optical measurement of oxygen saturation of blood in a region of the body of a living being, the system comprising:

• two measuring heads, each of which being provided with light emitting means adapted to emit light of various wave lengths;
• at least one light receiver;
• a mounting device adapted to detachably support the two measuring heads;
• and
• at least one additional mounting device equally adapted to datachably support the two measuring heads, said mounting device and said at least one additional mounting device being of dissimilar construction, thereby enabling the two measuring heads to be mounted as required onto the various mounting devices in different positions in relation to each other whereby the different positions depend on the specific mounting device selected.

System for the optical measurement of oxygen saturation of blood in a region of the body of a living being, the system comprising:

• two measuring heads, each of which being provided with light emitting means adapted to emit light of various wave lengths;
• at least one light receiver;
• and
• electronic circuit means connected to said measuring heads to process electrical signals supplied by said at least one light receiver to determine therefrom the oxygen saturation, wherein said circuit means are adapted to utilize light which originates from the light emitting means pertaining to the same measuring head as the light receiver which receives said light does, as well as light received by the light receiver in question and originating from the light emitting means of the other measuring head.

System for the optical measurement of oxygen saturation of blood in a region of the body of a living being, the system comprising:

• two measuring heads, each of which being provided with light emitting means adapted to emit light of various wave lengths;
• at least one light receiver;
• and
• electronic circuit means electrically connected with said measuring heads to process electrical signals supplied by the light receiver to said measuring heads and to determine therefrom the oxygen saturation, wherein at least when the two measuring heads are positioned on opposing sides of a bodily part, said circuit means is adapted to determine the oxygen saturation on the basis of the electrical signals supplied to said circuit means by said light receivers of both said measuring heads.

System for the measurement of the content of a blood gas, the system comprising:

• at least one measuring head for measuring said gas content optically comprising a support, a shell, disposed on said support, at least one light receiver, and at least one light source, the shell surrounding said at least one light receiver and said at least one light source, said measuring head being adapted to contact a bodily part and being open on the side designated to contact said bodily part;
• and
• at least one ultrasonic radiator comprising a plateshaped, piezoelectric element, also disposed within the shell and adapted to radiate ultrasonic waves into a region of the bodily part, and
• an ultrasonic wave transmitter consisting of a gelatinous mass disposed in a space enclosed by the shell on that side of the piezoelectric element that is designated to face the bodily part.