System and method of monitoring blood leaks during hemodialysis therapy employing wireless communication

Patent metadata

Field	Value
Publication number	US-9555178-B2
Application number	US-201313829868-A
Country	US
Kind code	B2
Filing date	Mar 14, 2013
Priority date	Dec 28, 2012
Publication date	Jan 31, 2017
Grant date	Jan 31, 2017

Abstract

According to at least one example embodiment, a system of monitoring blood leaks during hemodialysis therapy includes a wetness sensing device and a hemodialysis machine. The wetness sensing device is configured to transmit information wirelessly, the information being indicative of an absence of a liquid or a presence of a liquid. The hemodialysis machine includes, or is coupled to, a wireless receiver having two or more antennas. Signals received at the two or more antennas are decoded at the wireless receiver. If decoded signals indicate a detected wetness, the hemodialysis machine is caused to halt blood flow in and out of the machine and generate an alarm.

First claim

What is claimed is:

1. A system comprising:
a wetness sensing device configured to wirelessly transmit information associated with an absence of a liquid or a presence of a liquid; and
a hemodialysis machine comprising:
a first antenna in communication with a first receiver and a second antenna in communication with a second receiver, the first antenna and the second antenna being configured to:
simultaneously wirelessly receive the information; and
send the information to the first receiver and the second receiver, respectively;

wherein the first receiver is configured to generate a first digital signal based on the information and the second receiver is configured to generate a second digital signal based on the information; and
a processor configured to:
receive the first digital signal and the second digital signal;
calculate, based at least in part on the first digital signal, a first corrected digital signal representing an absence of a liquid or a presence of a liquid;
calculate, based at least in part on a the second digital signal, a second corrected digital signal representing an absence of a liquid or a presence of a liquid; and
authenticate at least one of the first corrected digital signal and the second corrected digital signal by checking against a cyclic redundancy check/check sum that is part of the first or second corrected digital signal to determine which of the first receiver and the second receiver has received authenticated data.

2. The system of claim 1 , wherein the processor is further configured to determine that one or more of the first corrected digital signal and the second corrected digital signal is authentic.

3. The system of claim 2 , wherein the processor is further configured to transmit the first corrected digital signal or the second corrected digital signal to a second processor based on determining that the one or more of the first corrected digital signal and the second corrected digital signal is authentic.

4. The system of claim 3 , wherein the second processor is configured to process the first corrected digital signal or the second corrected digital signal as input data for a safety system.

5. The system of claim 2 , wherein the processor is further configured to, in response to determining that both the first corrected digital signal and the second corrected digital signal are authentic:
select only one of the first corrected digital signal and the second corrected digital signal for transmission to a second processor.

6. The system of claim 5 , wherein the selection is based on a default selection.

7. The system of claim 1 , wherein the processor is further configured to determine that the first corrected digital signal or the second corrected digital signal is inauthentic.

8. The system of claim 7 , wherein the processor is further configured to disable transmission of the first corrected digital signal or the second corrected digital signal to a second processor based on a determination that the first corrected digital signal or the second corrected digital signal is inauthentic.

9. The system of claim 1 further comprising:
multiple antennas each in communication with multiple respective receivers, the multiple antennas and the multiple receivers configured to operate in a manner corresponding to the first antenna and the first receiver and the second antenna and the second receiver; and
the processor further configured to process multiple digital signals in a manner corresponding to the first digital signal and the second digital signal.

10. An apparatus comprising:
a first wireless receiving module comprising:
a first antenna coupled to a first receiver, the first antenna configured to receive information associated with one or more of an absence of a liquid or a presence of a liquid and the first receiver configured to generate a first digital signal based on the information;

a second wireless receiving module comprising:
a second antenna coupled to a second receiver, the second antenna configured to receive information associated with one or more of an absence of a liquid or a presence of a liquid and the second receiver configured to generate a second digital signal based on the information; and

a processor configured to:
calculate, based at least in part on the first digital signal, a first corrected digital signal representing an absence of a liquid or a presence of a liquid;
calculate, based at least in part on the second digital signal, a second corrected digital signal representing an absence of a liquid or a presence of a liquid; and
authenticate at least one of the first corrected digital signal and the second corrected digital signal by checking against a cyclic redundancy check/check sum that is part of the first or second corrected digital signal to determine which of the first receiver and the second receiver has received authenticated data.

11. The apparatus of claim 10 , wherein the processor is further configured to determine that one or more of the first corrected digital signal and the second corrected digital signal is authentic.

12. The apparatus of claim 11 , wherein the processor is further configured to transmit the first corrected digital signal or the second corrected digital signal to a second processor based on determining that the one or more of the first corrected digital signal and the second corrected digital signal is authentic.

13. The apparatus of claim 12 , wherein the second processor is further configured to process the first corrected digital signal or the second corrected digital signal as input data for a safety system.

14. The apparatus of claim 11 , wherein the processor is further configured to select only one of the first corrected digital signal and the second corrected digital signal for transmission to a second processor in response to determining that both the first corrected digital signal and second corrected digital signal are authentic.

15. The apparatus of claim 14 , wherein the selection is based on a default selection.

16. The apparatus of claim 10 , wherein the processor is further configured to determine that the first corrected digital signal or the second corrected digital signal is inauthentic.

17. The apparatus of claim 16 , wherein the processor is further configured to disable transmission of the first corrected digital signal or the second corrected digital signal to a second processor based on a determination that the first corrected digital signal or the second corrected digital signal is inauthentic.

18. The apparatus of claim 10 wherein:
the first wireless receiving module further comprises multiple antennas coupled to multiple receivers each configured to operate in a manner corresponding with the first antenna and first receiver and second antenna and second receiver; and
the processor further configured to generate multiple respective corrected digital signals based at least in part on respective digital signals generated by the multiple receivers.

Assignees

• Fresenius Medical Care Holdings Inc

Inventors

• Kotsos Michael Emmanuel
• Brown Alexander J
• Levin Roland
• Wang Fei
• Halliburton Donovan

Classifications

• H04B7/0882

  using post-detection diversity · CPC title

• A61M1/3656 Primary

  Monitoring patency or flow at connection sites; Detecting disconnections · CPC title

• B01D61/30

  Accessories; Auxiliary operation · CPC title

• H04B7/08

  at the receiving station · CPC title

• G08B21/20

  responsive to moisture · CPC title