System and method for coronary angioplasty
First Claim
1. A fluid pressure sensing and activating control system for coronary angioplasty, said system comprising:
- a balloon inflation means having an output leading to a balloon inflatable by fluid for effecting predetermined controlled change in the volume of said balloon;
a fluid conduit connector attached to the output of said balloon inflation means;
a fluid pressure sensor and transducer connected to the output of said balloon inflation means and directly contacting said fluid for measuring the actual fluid pressure applied to the balloon by said inflation means;
a processor and control unit for receiving signals from said pressure sensor and transducer via an A/D converter;
a pulse width generator for receiving signals from said processor for activating said balloon inflation means.
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Accused Products
Abstract
There is provided a fluid pressure sensing and activating control system for coronary angioplasty, including a fluid pressure sensor and transducer connected to feed signals via an A/D converter to a processor and control unit, a pulse width generator receiving signals from the processor for activating a balloon inflator, and a fluid conduit connector attached to the output of the inflator and to the input of the fluid pressure sensor and transducer, and having a further output port connectable to an inflatable balloon. A method for dilating a section of an elastic conduit by means of an inflatable balloon inserted therein is also provided.
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Citations
10 Claims
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1. A fluid pressure sensing and activating control system for coronary angioplasty, said system comprising:
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a balloon inflation means having an output leading to a balloon inflatable by fluid for effecting predetermined controlled change in the volume of said balloon; a fluid conduit connector attached to the output of said balloon inflation means; a fluid pressure sensor and transducer connected to the output of said balloon inflation means and directly contacting said fluid for measuring the actual fluid pressure applied to the balloon by said inflation means; a processor and control unit for receiving signals from said pressure sensor and transducer via an A/D converter; a pulse width generator for receiving signals from said processor for activating said balloon inflation means. - View Dependent Claims (2, 3, 4)
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5. A method for dilating a section of an elastic conduit by means of an inflatable balloon inserted therein, comprising the steps of:
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a) providing a system including balloon means, balloon inflating means, pressure monitoring means, pulse width generator means, and control means; b) gradually inflating said balloon by means of fluid to a first maximal pressure, during a preset first period of time; c) generating pressure signals representing pressure in said balloon by means of said pressure monitoring means during inflation; d) generating inflation signals by means of said control means and said pulse width generator means in response to said pressure signals, said inflation signals being used to control the rate of inflating said balloon during said preset first period of time; e) retaining said first maximal pressure inside the balloon for a preset second period of time; f) rapidly deflating said balloon to a minimal pressure; g) retaining said minimal pressure for a predetermined period of time; and h) repeating steps (b) to (g), each time increasing the pressure of step (b) to a pressure higher than the previously inflated maximal pressure. - View Dependent Claims (6, 7, 8, 9, 10)
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Specification