SYSTEM, METHOD, AND APPARATUS FOR UTILIZING A PUMPING CASSETTE
1 Assignment
0 Petitions
Accused Products
Abstract
The present invention involves, in some embodiments, systems and methods for pumping fluid into or out of a patient via a cartridge. The cartridge may include a membrane defining a chamber and mechanisms to supply, measure and control pressure in the chamber. The system further includes a processor that can be configured to compare certain pressure measurements to each other to facilitate determining if an error condition exists in the medical system if the difference between measurements is greater than a threshold. In certain cases the error condition may indicate leakage of the membrane, for example due to a pinhole in the membrane.
26 Citations
32 Claims
-
1. (canceled)
-
2. A medical system for pumping fluid into or out of a patient via a cartridge, the medical system comprising:
-
the cartridge having a membrane defining a chamber; a pressure source in fluid communication with the chamber, wherein the pressure source is configured to adjust a pressure of the pressure source; a pressure transducer configured to measure a pressure associated with the pressure source; a valve configured to isolate the chamber and operatively connect the pressure source to the chamber; and a processor within the medical system configured to; adjust the pressure source to a predetermined value; measure a first pressure value of the pressure transducer; measure a second pressure value of the pressure transducer after a predetermined amount of time; determine a difference by comparing the first and second values to each other; and determine an error condition exists in the medical system if the difference is greater than a threshold. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
-
16. A medical system for pumping fluid at least one of into and out of a patient using a cartridge, the system comprising:
-
the cartridge having a membrane defining a chamber; a pressure source in fluid communication with the chamber, wherein the pressure source is configured to adjust a pressure within the pressure source, a pressure transducer configured to measure a pressure in operative communication with the pressure source; a valve configured to isolate the chamber and operatively connect the pressure source to the chamber; and a medical system processor configured to; adjust the pressure source to a predetermined value; measure a first pressure value of the pressure transducer; measure a second pressure value of the pressure transducer after a predetermined amount of time; determine a difference by comparing the first and second values to each other; and leakage-detection means for determining leakage of the membrane. - View Dependent Claims (17)
-
-
18. A medical system for pumping fluid at least one of into and out of a patient using a cartridge, the medical system comprising:
-
the cartridge having a medical-grade membrane defining a chamber; a pressure source in fluid communication with the chamber, wherein the pressure source is configured to adjust a pressure associated with the pressure source; a pressure transducer configured to measure a pressure in operative communication with the pressure source; a valve configured to isolate the chamber and operatively connect the pressure source to the chamber; and a processor in the medical system configured to; adjust the pressure source to a predetermined value; measure a first pressure value of the pressure transducer; measure a second pressure value of the pressure transducer after a predetermined amount of time; determine a difference by comparing the first and second values to each other; and pinhole-detection means for detecting a pinhole in the membrane.
-
-
19. A medical fluid flow control system comprising:
-
a first chamber; a second chamber; a pressure tank containing a fluid having a pressure connected to the second chamber; a transducer disposed within the pressure tank for creating a pressure signal; a valve disposed between the second chamber and the pressure tank; a medical-grade membrane disposed between the first chamber and the second chamber; a valve controller connected to the valve; a pump connected to the pressure tank; and a processor connected to the transducer, to the pump and to the valve controller for; a) signaling the valve controller to shut the valve; b) adjusting the pressure of the fluid in the pressure tank with the pump; c) reading the pressure signal from the transducer at a first set of predetermined intervals while the valve is shut creating a first set of pressure signal readings; d) calculating a baseline value based on the first set of pressure signals while the valve is shut; e) sending a signal to the valve controller to open the valve; f) reading the pressure signal from the transducer at a second set of predetermined timed intervals creating a second set of pressure signal readings while the valve is open; g) calculating a second value based on the second set of pressure signals; h) calculating a leakage rate based on the first and second value; and i) creating an alarm signal if the leakage rate exceeds a predefined value. - View Dependent Claims (20, 21, 22, 23, 24)
-
-
25. A medical system for pumping fluid into or out of a patient via a cartridge, the medical system comprising:
-
a cassette holder configured to receive a cassette a cassette received in the cassette holder, the cassette having a membrane capable of receiving a pressure; a pressure source configured to be capable of being in fluid communication with the chamber, wherein the pressure source is configured to adjust a pressure of the pressure source; a pressure transducer configured to measure a pressure in operative communication with the pressure source; a valve configured to isolate the chamber and operatively connect the pressure source to the chamber; and a processor within the medical system configured to; adjust the pressure source to a predetermined value; measure a first pressure value of the pressure transducer; measure a second pressure value of the pressure transducer after a predetermined amount of time; means for leak detection of the membrane. - View Dependent Claims (26, 27)
-
-
28. A medical system for pumping fluid into or out of a patient via a cartridge, the medical system comprising:
-
a cassette holder configured to receive a cassette a cassette received in the cassette holder, the cassette having a membrane capable of receiving a pressure; a pressure source configured to be capable of being in fluid communication with the chamber, wherein the pressure source is configured to adjust a pressure of the pressure source; a pressure transducer configured to measure a pressure in operative communication with the pressure source; a valve configured to isolate the chamber and operatively connect the pressure source to the chamber; and a processor within the medical system configured to; actuate the value to first and second positions; adjust the pressure source to a predetermined value; measure a first pressure value of the pressure transducer; and measure a second pressure value of the pressure transducer after a predetermined amount of time, wherein the processor, the valve, the pressure source, and the pressure transducer are configured to detect a leak of the membrane. - View Dependent Claims (29, 30, 31, 32)
-
Specification