Drug delivery system
First Claim
1. A system for controlling delivery of a physiological fluid internally to a patient from a balloon catheter, the balloon catheter comprising a distal balloon connected to a catheter shaft, an inflation-fluid conduit connecting the balloon to a proximal source of pressurized balloon inflation fluid, and a physiological-fluid conduit connecting a fluid-delivery outlet of the balloon catheter to a proximal source of pressurized physiological fluid;
- the system comprising(a) a controller;
(b) an inflation-fluid pressurizer for maintaining inflation fluid in the inflation-fluid conduit under pressure, the inflation-fluid pressurizer being connected to receive signals from the controller to cycle pressure in the inflation-fluid conduit between a balloon inflating pressure and a balloon deflating pressure;
(c) a physiological-fluid pressurizer for maintaining physiological fluid in the physiological-fluid conduit under pressure, the physiological-fluid pressurizer being connected to receive signals from the controller to cycle pressure in the physiological-fluid conduit between a fluid delivery pressure and a resting pressure;
the controller being programmed to synchronize the signals to the inflation-fluid pressurizer with the signals to the physiological-fluid pressurizer, such that periods of balloon inflating pressure in the inflation-fluid conduit generally overlap with periods of fluid delivery pressure in the physiological-fluid conduit, and periods of balloon deflating pressure in the inflation-fluid conduit generally overlap with periods of resting pressure in the physiological-fluid conduit.
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Accused Products
Abstract
A system for controlling delivery of a physiological fluid internally to a patient from a balloon catheter. The system includes a controller, an inflation-fluid pressurizer for maintaining inflation fluid in an inflation-fluid conduit under pressure, and a physiological-fluid pressurizer for maintaining physiological fluid in a physiological-fluid conduit under pressure. The inflation-fluid pressurizer is connected to receive signals from the controller to cycle pressure in the inflation-fluid conduit between a balloon inflating pressure and a balloon deflating pressure. The physiological-fluid pressurizer is connected to receive signals from the controller to cycle pressure in the physiological-fluid conduit between a fluid delivery pressure and a resting pressure. The controller is programmed to synchronize signals to the inflation-fluid pressurizer with signals to the physiological-fluid pressurizer. Thus, periods of balloon inflating pressure in the inflation-fluid conduit generally overlap with periods of fluid delivery pressure in the physiological-fluid conduit, and periods of balloon deflating pressure in the inflation-fluid conduit generally overlap with periods of resting pressure in the physiological-fluid conduit.
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Citations
13 Claims
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1. A system for controlling delivery of a physiological fluid internally to a patient from a balloon catheter, the balloon catheter comprising a distal balloon connected to a catheter shaft, an inflation-fluid conduit connecting the balloon to a proximal source of pressurized balloon inflation fluid, and a physiological-fluid conduit connecting a fluid-delivery outlet of the balloon catheter to a proximal source of pressurized physiological fluid;
- the system comprising
(a) a controller;
(b) an inflation-fluid pressurizer for maintaining inflation fluid in the inflation-fluid conduit under pressure, the inflation-fluid pressurizer being connected to receive signals from the controller to cycle pressure in the inflation-fluid conduit between a balloon inflating pressure and a balloon deflating pressure;
(c) a physiological-fluid pressurizer for maintaining physiological fluid in the physiological-fluid conduit under pressure, the physiological-fluid pressurizer being connected to receive signals from the controller to cycle pressure in the physiological-fluid conduit between a fluid delivery pressure and a resting pressure;
the controller being programmed to synchronize the signals to the inflation-fluid pressurizer with the signals to the physiological-fluid pressurizer, such that periods of balloon inflating pressure in the inflation-fluid conduit generally overlap with periods of fluid delivery pressure in the physiological-fluid conduit, and periods of balloon deflating pressure in the inflation-fluid conduit generally overlap with periods of resting pressure in the physiological-fluid conduit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
- the system comprising
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13. A method for delivering a physiological fluid internally to a patient from a balloon catheter, the balloon catheter comprising a distal balloon connected to a catheter shaft, an inflation-fluid conduit connecting the balloon to a proximal source of pressurized balloon inflation fluid, and a physiological-fluid conduit connecting a fluid-delivery outlet of a balloon catheter to a proximal source of pressurized physiological fluid;
- the method comprising;
providing a system comprising (a) a controller;
(b) an inflation-fluid pressurizer for maintaining inflation fluid in the inflation-fluid conduit under pressure; and
(c) a physiological-fluid pressurizer for maintaining physiological fluid in the physiological-fluid conduit under pressure;
alternately inflating and deflating the balloon at the internal location by cycling pressure in the inflation-fluid conduit between a balloon inflating pressure and a balloon deflating pressure;
alternately delivering physiological fluid at the internal location by cycling pressure in the physiological-fluid conduit between a fluid delivery pressure and a resting pressure;
synchronizing cycling of the pressure in the inflation-fluid conduit with cycling of the pressure in the physiological-fluid conduit, so that periods of balloon inflating pressure in the inflation-fluid conduit generally overlap with periods of fluid delivery pressure in the physiological-fluid conduit, and periods of balloon deflating pressure in the inflation-fluid conduit generally overlap with periods of resting pressure in the physiological-fluid conduit.
- the method comprising;
Specification