Apparatus for and method of monitoring and controlling body-function parameters during intracranial observation
First Claim
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1. A system for monitoring and controlling selected body function parameters during intracranial observations, said system comprising:
- (a) intracranial pressure monitor means for sensing fluid pressure in the cranium and providing a pressure output signal;
(b) a first comparator means for receiving the pressure output signal and generating a first output signal when the pressure output signal exceeds a predetermined limit;
(c) rate detector means for receiving the pressure output signal from said monitor means and generating a rate signal when the rate of change of said pressure exceeds a predetermined limit;
(d) intracranial bloodflow monitor means for sensing and providing a bloodflow output signal(e) a second comparator means for receiving the bloodflow output signal and generating a second output signal when said bloodflow is less than a predetermined limit,(f) means for controlling the rate of introduction of fluid into the vascular system of the body;
(g) means responsive to the second output signal from said comparator means for altering the composition of said fluid to thereby vary cranial bloodflow; and
(h) set-point control means for receiving the first output signal and the rate signal, said control means varying the predetermined limit of said second comparator means to permit the alteration of the composition of said fluid at a lesser cranial bloodflow.
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Abstract
A system and method for monitoring body-function parameters including bloodflow, intracranial pressure and blood pressure during cranial observation of an individual wherein different pharmacological agents are added to an intravenous fluid to compensate for changes in the parameters.
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Citations
10 Claims
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1. A system for monitoring and controlling selected body function parameters during intracranial observations, said system comprising:
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(a) intracranial pressure monitor means for sensing fluid pressure in the cranium and providing a pressure output signal; (b) a first comparator means for receiving the pressure output signal and generating a first output signal when the pressure output signal exceeds a predetermined limit; (c) rate detector means for receiving the pressure output signal from said monitor means and generating a rate signal when the rate of change of said pressure exceeds a predetermined limit; (d) intracranial bloodflow monitor means for sensing and providing a bloodflow output signal (e) a second comparator means for receiving the bloodflow output signal and generating a second output signal when said bloodflow is less than a predetermined limit, (f) means for controlling the rate of introduction of fluid into the vascular system of the body; (g) means responsive to the second output signal from said comparator means for altering the composition of said fluid to thereby vary cranial bloodflow; and (h) set-point control means for receiving the first output signal and the rate signal, said control means varying the predetermined limit of said second comparator means to permit the alteration of the composition of said fluid at a lesser cranial bloodflow. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for use in monitoring and controlling selected body function parameters during intracranial observations, said method comprising the steps:
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(a) sensing intracranial fluid pressure and generating a first electrical signal representative of said pressure; (b) setting an upper limit for said pressure and generating a limit pressure signal if said first signal exceeds said limit; (c) setting a rate of increase limit for said pressure and generating a rate pressure signal if said first signal exceeds said rate; (d) sensing intracranial bloodflow and generating a second electrical signal representative of said bloodflow; (e) setting a lower limit for bloodflow and generating a lower limit signal if said second signal is less than said limit; (f) regulating said lower limit for bloodflow in response to at least one of said limit pressure and rate pressure signals; and (g) controlling the composition of fluid introduced into the vascular system of the observed body subject in response to the lower limit signal, whereby selected body function parameters of said subject are controlled during intracranial observation. - View Dependent Claims (8, 9, 10)
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Specification