System and method for monitoring, displaying and recording balloon catheter condition interval data
First Claim
1. In a system comprising an inflatable balloon member connected through tubing to a syringe barrel and wherein a plunger slidably mounted within said barrel is moveable to selectively apply and then release fluid pressures exerted on said balloon member so as to selectively inflate said balloon member one or more times, a method of monitoring and recording data comprising the steps of:
- equalizing the internal pressure of the syringe barrel to ambient atmospheric pressure; and
executing a transducer zeroing step comprising the steps of;
detecting an electromagnetic zeroing signal that is output by a transducer means, in fluid communication with the internal pressure of the syringe barrel, for detecting pressure and for outputting a voltage in proportion thereto, said zeroing signal being not equal to zero volts at ambient atmospheric pressure;
converting said zeroing signal to a digital zeroing signal using a means for A/D signal conversion;
inputting said digital zeroing signal to a means for digital signal processing; and
automatically electronically digitally processing the digital zeroing signal using said digital processor means to automatically compute and record in said digital signal processor means a numerical transducer offset representing ambient atmospheric pressure.
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Accused Products
Abstract
An electronically controlled syringe system for connection to a balloon catheter for automatically monitoring, displaying and recording inflation or deflation data. A syringe applies and releases pressure to and from the balloon catheter. A transducer housed on the syringe barrel emits at atmospheric pressure a signal by which both the syringe and transducer are recognizable to the system as a particular type of syringe. The system prompts the user to verify the recognized type of syringe. The system prompts the user to verify the recognized type of syringe. The transducer, which can be calibrated, senses fluid pressures applied by the syringe. The signal output by the transducer is input to a controller where the signal is digitally processed so as to derive and record therefrom data representing the magnitude of applied fluid pressure and the length of time that pressure is applied by the syringe. The data is automatically displayed and recorded. The syringe system permits input of various control parameters, such as a maximum positive inflation pressure and maximum duration for applying pressure.
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Citations
14 Claims
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1. In a system comprising an inflatable balloon member connected through tubing to a syringe barrel and wherein a plunger slidably mounted within said barrel is moveable to selectively apply and then release fluid pressures exerted on said balloon member so as to selectively inflate said balloon member one or more times, a method of monitoring and recording data comprising the steps of:
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equalizing the internal pressure of the syringe barrel to ambient atmospheric pressure; and executing a transducer zeroing step comprising the steps of; detecting an electromagnetic zeroing signal that is output by a transducer means, in fluid communication with the internal pressure of the syringe barrel, for detecting pressure and for outputting a voltage in proportion thereto, said zeroing signal being not equal to zero volts at ambient atmospheric pressure; converting said zeroing signal to a digital zeroing signal using a means for A/D signal conversion; inputting said digital zeroing signal to a means for digital signal processing; and automatically electronically digitally processing the digital zeroing signal using said digital processor means to automatically compute and record in said digital signal processor means a numerical transducer offset representing ambient atmospheric pressure. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. In a system comprising an inflatable balloon member connected through tubing to a syringe barrel and wherein a plunger slidably mounted within said barrel is moveable to selectively apply and then release fluid pressures exerted on said balloon member so as to selectively inflate said balloon member one or more times, a method of monitoring and recording data comprising the steps of:
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filling up said syringe barrel with a liquid fluid; electromagnetically coupling a transducer means for detecting pressure and for outputting a voltage in proportion thereto with a means for digital signal processing, said transducer means being in fluid communication with internal pressure of the syringe barrel; removing any pressure in the syringe barrel that is above atmospheric pressure; and executing a transducer zeroing step comprising the steps of; detecting an electromagnetic zeroing signal that is output by the transducer means, said zeroing signal being not equal to zero volts at ambient atmospheric pressure; converting said zeroing signal to a digital zeroing signal using a means for A/D signal conversion; inputting said digital zeroing signal to the digital processing means; and automatically electronically digitally processing the digital zeroing signal using said digital processor means to automatically compute and record in said digital signal processor means a numerical transducer offset. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A system for monitoring inflation of a balloon-type member, and for automatically recording balloon-type member inflation data, said system comprising:
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a syringe connectable so as to be in fluid communication with the balloon-type member through a length of tubing, the syringe comprising a barrel and a plunger selectively operable to inflate the balloon-type member by applying fluid pressure thereto through the length of tubing by sliding the plunger into the barrel; transducer means, in fluid communication with said syringe and the length of tubing, for sensing the applied fluid pressure and for outputting an electromagnetic pressure signal proportional to the applied fluid pressure, the transducer means having a substantially constant non-zero voltage electromagnetic output signal at a substantially ambient atmospheric sensed fluid pressure; means for convening said electromagnetic signal output from the transducer means into a digital pressure signal; means for outputting a visual display; digital processor means, electrically connected to the display means, for processing the digital pressure signal so as to electronically monitor, display and record the pressure applied to the balloon-type member, and the duration of the inflation of the balloon-type member by performing the programmed steps of; deriving data from the digital pressure signal converted by the means for converting, which represents the constant non-zero voltage electromagnetic output signal at substantially ambient atmospheric sensed fluid pressure; deriving data from said digital pressure signal which represents a numerical value of the magnitude of said applied pressure which is compensated by offsetting from said numerical value the constant non-zero voltage output signal of the transducer means; deriving data from said digital pressure signal and from a system clock signal which represents a numerical value of the duration of said applied pressure; electronically storing all said derived data for later retrieval and output; automatically displaying said numerical values of the duration of inflation pressure and the magnitude of said applied pressure in a visually perceptible manner to a system user on said display means; data memory means for storing the digital data derived by said digital processor means for later retrieval and output; and program memory means for storing machine-readable instructions utilized by said digital processor means to carry out said programmed steps.
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Specification