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 performing an integrity test on a medical grade cassette that is configured to be used on a medical fluid handling system, wherein the cassette may be disposable and may comprise a membrane therein. The test may be configured to determine an error condition, such as detection of membrane leakage above a threshold value, and may in certain cases be implemented by a medical computer system. In certain cases the integrity test is a dry integrity test and in certain cases, the test is configured to determine a leakage rate of fluid through the membrane.
-
Citations
55 Claims
-
1. (canceled)
-
2. A method for performing a dry integrity test on a medical-grade cassette, the medical-grade cassette being a single-use disposable cassette that can removably mate with a reusable portion of a dialysis machine, the method comprising:
-
adjusting a pressure of a pressure tank in the reusable portion; closing a valve in the reusable portion of the dialysis machine connecting the pressure tank to a membrane of a medical-grade disposable cassette; measuring a first pressure of the pressure tank within the reusable portion; opening the valve in the reusable portion; measuring a second pressure of the pressure tank; determining a difference between the first and second pressures; and determining whether the membrane of the medical-grade disposable cassette is leaking above a threshold using the difference. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
-
17. A method for performing a dry integrity test on a disposable cassette that is configured to be used on a medical fluid handling system, the method comprising:
-
receiving a pressure on a membrane of the cassette; measuring a first pressure associated with the membrane; allowing a predetermined amount of time to pass; measuring a second pressure associated with the membrane; determining a difference between the first and second pressures; and determining whether the difference is above a predetermined threshold. - View Dependent Claims (18, 19)
-
-
20. A method for detecting a leakage rate of fluid through a medical grade membrane in a fluid flow control system having a first chamber and a second chamber, the membrane being disposed between the first chamber and the second chamber, the second chamber having a connection to a pressure tank, the pressure tank having a fluid with a pressure, the connection defining a fluid path, the method comprising:
-
blocking the fluid path; adjusting the pressure of the fluid in the pressure tank; measuring a first pressure in the pressure tank to generate a first pressure value while the fluid path is blocked and after the pressure in the pressure tank is adjusted; unblocking the fluid path; measuring a second pressure in the pressure tank to generate a second pressure value after the fluid path is unblocked; and step for leak-detection for determining whether the membrane is leaking.
-
-
21. A method for detecting a leakage rate of fluid through a medical membrane in a fluid flow control medical system having a first chamber and a second chamber, the membrane being disposed between the first chamber and the second chamber, the second chamber having a medical-grade connection to a pressure tank, the pressure tank having a fluid with a pressure, the connection defining a medical-grade fluid path, the method comprising:
-
blocking the fluid path; adjusting the pressure of the fluid in the pressure tank; measuring a first pressure in the pressure tank to generate a first pressure value while the fluid path is blocked and after the pressure in the pressure tank is adjusted; unblocking the fluid path; measuring a second pressure in the pressure tank to generate a second pressure value after the fluid path is unblocked; and determining a leakage of fluid through the membrane based on the first and second pressure values. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
-
-
31. A method implemented by a medical computer system for detecting a leakage rate of fluid through a membrane in a fluid flow control system having a first chamber and a second chamber, the membrane disposed between the first chamber and the second chamber, the second chamber having a connection to a pressure tank, the pressure tank having a fluid with a pressure, the connection defining a fluid path, the method implemented by executing a set of instructions on the medical computer, the method performing the acts of:
-
activating, using the medical computer, a valve controller for blocking the fluid path; adjusting, using the medical computer, the pressure of the fluid in the pressure tank; reading, using the medical computer, the pressure in the pressure tank while the fluid path is blocked; creating, using the medical computer, a pressure measurement at each of a first set of multiple timed intervals while the fluid path is blocked and after the pressure is adjusted; calculating, using the medical computer, a blocked pressure value based on the pressure measurements in the pressure tank at the first set of multiple timed intervals; activating, using the medical computer, the valve controller unblocking the fluid path; reading, using the medical computer, the pressure within the pressure tank while the fluid path is unblocked; creating, using the medical computer, a pressure measurement at each of a second set of multiple timed intervals after the fluid path is unblocked; calculating, using the medical computer, an unblocked pressure value based on the pressure measurements in the pressure tank at the second set of multiple timed intervals; and calculating, using the medical computer, a leakage rate based on the blocked pressure value and the unblocked pressure value. - View Dependent Claims (32, 33, 34, 35)
-
-
36. A method for detecting a leakage rate of fluid through a membrane in a fluid flow control system having a first chamber and a second chamber, the membrane being disposed between the first chamber and the second chamber, the second chamber having a connection to a pressure tank, the pressure tank having a fluid with a pressure, the connection defining a fluid path, the method comprising:
-
blocking the fluid path; adjusting the pressure of the fluid in the pressure tank; taking a first measurement of the pressure within the pressure tank after the pressure tank is adjusted and the fluid path is blocked; unblocking the fluid path; taking a second measurement of the pressure within the pressure tank after the fluid path is unblocked; taking the difference between the first and second measurements; and determining whether the difference is above a threshold. - View Dependent Claims (37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
-
-
49. A method for performing a dry integrity test on a medical-grade cassette, the method comprising:
-
adjusting a pressure of a pressure tank; adjusting a valve connecting the pressure tank to a membrane of a cassette to a first position; measuring a first pressure of the pressure tank after the valve has been in the first position; adjusting the valve to a second position; measuring a second pressure of the pressure tank after the valve has been in the second position; determining a difference between the first and second pressures; and determining whether the membrane is leaking above a threshold using the difference. - View Dependent Claims (50, 51, 52, 53)
-
-
54. A method for performing a dry integrity test on a medical-grade cassette, the method comprising:
-
adjusting a pressure of a pressure tank; adjusting a valve connecting the pressure tank to a membrane of a cassette to a first position; measuring a first pressure of the pressure tank after the valve has been in the first position; adjusting the valve to a second position; measuring a second pressure of the pressure tank after the valve has been in the second position; determining a difference between the first and second pressures; and step for membrane leak detection. - View Dependent Claims (55)
-
Specification