Warning apparatus for indicating a threat of impending shock
First Claim
1. In a warning apparatus for indicating the threat of impending shock in a patient, including photoelectric pulse pickup means adapted to be applied to the skin of said patient and comprising at least one light transmitter and at least two light receivers, said light transmitter comprising substantially a light source, said light receivers converting incident light into corresponding electrical signals, said receivers comprising combined reflection and transmission receivers;
- signal comparison means having at least one threshold discriminator set to predetermined critical threshold values corresponding to upper and lower boundary values and being operatively connected to said pulse pickup means for comparing simultaneously signals obtained from a reflection and transmission measurement with said boundary values and to generate an output signal; and
alarm means responsive to said output signal for initiating an alarm when the signals compared by said comparison means with said boundary values exceed or fall below said boundary values, said signals from said pickup means comprising simultaneous transmissive and reflective signals dependent on the physiological characteristics of a patient related to impending shock conditions.
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Accused Products
Abstract
A warning apparatus for indicating the threat of impending shock, which includes a photoelectric pulse pickup or receiver adapted to be applied onto the skin of a patient. The pulse pickup or receiver is a combined reflective and transmissive receiver, and the pulse pickup has a signal comparison arrangement associated therewith which compares the signal obtained from a reflective and transmissive measurement with predetermined signal threshold or boundary values, and which will generate an output signal for initiation of an alarm when the output signal of the pulse pickup exceeds the boundary value imparted thereto.
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Citations
8 Claims
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1. In a warning apparatus for indicating the threat of impending shock in a patient, including photoelectric pulse pickup means adapted to be applied to the skin of said patient and comprising at least one light transmitter and at least two light receivers, said light transmitter comprising substantially a light source, said light receivers converting incident light into corresponding electrical signals, said receivers comprising combined reflection and transmission receivers;
- signal comparison means having at least one threshold discriminator set to predetermined critical threshold values corresponding to upper and lower boundary values and being operatively connected to said pulse pickup means for comparing simultaneously signals obtained from a reflection and transmission measurement with said boundary values and to generate an output signal; and
alarm means responsive to said output signal for initiating an alarm when the signals compared by said comparison means with said boundary values exceed or fall below said boundary values, said signals from said pickup means comprising simultaneous transmissive and reflective signals dependent on the physiological characteristics of a patient related to impending shock conditions. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- signal comparison means having at least one threshold discriminator set to predetermined critical threshold values corresponding to upper and lower boundary values and being operatively connected to said pulse pickup means for comparing simultaneously signals obtained from a reflection and transmission measurement with said boundary values and to generate an output signal; and
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8. In a warning apparatus for indicating the threat of impending shock in a patient, including photoelectric pulse pickup means adapted to be applied to the skin of said patient and comprising at least one light transmitter and at least two light receivers, said light transmitter comprising substantially a light source, said light receivers converting incident light with corresponding electrical signals, and receivers comprising combined reflection and transmission receivers;
- signal comparison means having at least one threshold discriminator set to predetermined critical threshold values corresponding to upper and lower boundary values and being operatively connected to said pulse pickup means for comparing signals obtained from a reflection and transmission measurement with said boundary values and to generate an output signal; and
alarm means responsive to said output signal for initiating an alarm when the signals compared by said comparison means with said boundary values exceed or fall below said boundary values, said signal comparison means comprising a proportionality former for producing a proportionality signal from said reflective signal and said transmissive signal; and
a boundary value indicator being connected to said proportionality former and generating an output signal upon said proportionality signal exceeding or falling below a predetermined boundary value.
- signal comparison means having at least one threshold discriminator set to predetermined critical threshold values corresponding to upper and lower boundary values and being operatively connected to said pulse pickup means for comparing signals obtained from a reflection and transmission measurement with said boundary values and to generate an output signal; and
Specification