Blood set component connection detection

Patent metadata

Field	Value
Publication number	US-9844620-B2
Application number	US-201314653008-A
Country	US
Kind code	B2
Filing date	Dec 16, 2013
Priority date	Dec 20, 2012
Publication date	Dec 19, 2017
Grant date	Dec 19, 2017

Abstract

Extracorporeal blood treatment systems and methods to detect the connection of one or more components (e.g., of an extracorporeal blood set) thereto (e.g., to one or more pressure transducers contained in the system housing) by, for example, controlling an air pump apparatus to provide air to a connection port at which the component is to be connected and monitoring pressure resulting therefrom to detect whether the component is operatively connected (e.g., based on a detected change in the monitored pressure due to the increased resistance, based on a monitored rate of decay of pressure of injected air, etc.).

First claim

What is claimed is:

1. An extracorporeal blood treatment system comprising:
an air pump apparatus;
one or more pressure transducers;
a controller operatively coupled to the air pump apparatus and the one or more pressure transducers;
a system housing to contain at least the air pump apparatus, the controller, and the one or more pressure transducers; and
an extracorporeal blood set comprising a plurality of components configured to be mounted on the system housing of the extracorporeal blood treatment system using connection apparatus, wherein the connection apparatus comprises one or more ports to connect the one or more pressure transducers contained in the system housing to one or more components of the plurality of components of the extracorporeal blood set when mounted on the system housing, wherein the controller is configured to:
control the air pump apparatus to provide air to at least one port of the one or more ports and within at least a portion of one or more components when mounted on the system housing using the connection apparatus; and
monitor air pressure resulting from the provision of air to the at least one port using at least one of the one or more pressure transducers to detect whether one or more components of the plurality of components are operatively connected to the system housing.

2. The system of claim 1 , wherein the extracorporeal blood set comprises one or more components comprising a closed container portion mountable on the system housing of the extracorporeal blood treatment system, wherein the closed container portion is operatively connectable to at least one of the one or more pressure transducers, and further wherein the controller is configured to:
control provision of air from the air pump apparatus to at least one port of the one or more ports and within the closed container portion of at least one component when mounted on the system housing using the connection apparatus, wherein the at least one component creates an increase in resistance to the air provided when mounted on the system housing; and
monitor air pressure resulting from the provision of air to the at least one port to determine whether the component comprising the closed container portion is operatively connected to the system housing based on a detected rise in the monitored pressure due to the increased resistance.

3. The system of claim 1 , wherein the extracorporeal blood set comprises a plurality of pressure measurement apparatus configured to be mounted on the system housing of the extracorporeal blood treatment system, wherein each of the plurality of pressure measurement apparatus comprises a pressure pod body configured to be mounted on the system housing and a diaphragm separating a fluid side cavity and a transducer side air cavity, wherein the transducer side air cavity is operatively connectable to at least one of the one or more pressure transducers such that pressure of fluid when present in the fluid side cavity is transferred to the transducer side air cavity via the diaphragm and measureable using the at least one pressure transducer, and further wherein the controller is configured to:
control provision of air from the air pump apparatus to at least one port of the one or more ports and into the transducer side air cavity of a first pressure measurement apparatus of the plurality of pressure measurement apparatus when mounted on the system housing; and
monitor air pressure resulting from the provision of air to the at least one port to detect whether the first measurement apparatus is operatively connected to the system housing based on a detected rise in the monitored pressure.

4. The system of claim 3 , wherein the controller is configured to detect a rise in pressure by comparing the resulting air pressure to a predetermined pressure threshold and determining that the first pressure measurement apparatus is operatively connected if a predetermined number of samples thereof satisfy the predetermined pressure threshold.

5. The system of claim 3 , wherein the controller is configured to detect a rise in pressure by monitoring pressure at the at least one port prior to and after providing air thereto to detect a pressure difference.

6. The system of claim 1 , wherein the extracorporeal blood set comprises an open line element configured to be mounted on the system housing of the extracorporeal blood treatment system and connectable to a port of the one or more ports of the connection apparatus, wherein the open line element is operatively connected to at least one of the one or more pressure transducers when mounted on the system housing, and further wherein the controller is configured to:
control injection of air to the port of the one or more ports using the air pump apparatus and within the open line element when mounted on the system housing, wherein the open line element creates an increase in resistance to the injected air when mounted on the system housing resulting in a decreased rate of decay of the pressure of the injected air; and
monitor a rate of decay of pressure of the injected air to determine whether the open line element is operatively connected to the system housing.

7. The system of claim 6 , wherein the controller is further configured to monitor the rate of decay of pressure by:
determining a pressure difference integral of the injected air over a period of time following the injection of pressurized air to the port by integrating a difference between the pressure when air is being injected to the port and an initial pressure prior to air being injected to the port;
comparing the pressure difference integral to a predetermined pressure integral threshold; and
detecting that the open line element is operatively connected if the pressure difference integral satisfies the predetermined pressure integral threshold.

8. An extracorporeal blood treatment system comprising:
an air pump apparatus;
one or more pressure transducers;
a controller operatively coupled to the air pump apparatus and the one or more pressure transducers;
a system housing to contain at least the air pump apparatus, the controller, and the one or more pressure transducers; and
an extracorporeal blood set comprising a plurality of components, wherein the plurality of components comprise a plurality of pressure measurement apparatus configured to be mounted on the system housing of the extracorporeal blood treatment system, wherein each of the plurality of pressure measurement apparatus comprises a pressure pod body configured to be mounted on the system housing and a diaphragm separating a fluid side cavity and a transducer side air cavity, wherein the transducer side air cavity is operatively connectable to at least one of the one or more pressure transducers such that pressure of fluid when present in the fluid side cavity is transferred to the transducer side air cavity via the diaphragm and measureable using the at least one pressure transducer,
wherein the controller is configured to:
control the air pump apparatus to provide a positive air flow from the air pump apparatus to at least one port of the one or more ports into the transducer side air cavity of a pressure measurement apparatus of the plurality of pressure measurement apparatus when mounted on the system housing or provide a negative air flow from at least one port of the one or more ports opposite the positive air flow; and
monitor air pressure resulting from the provision of air by the air pump to detect whether the pressure measurement apparatus is operatively connected to the system housing based on a detected change in the pressure magnitude.

9. The system of claim 1 , wherein the system further comprises a clarifying air filter connec

Assignees

• Gambro Lundia Ab

Inventors

• Stuva Rickie L
• Fyten Steve
• O'Mahony John

Classifications

• A61M2205/12

  with interchangeable cassettes forming partially or totally the fluid circuit · CPC title

• A61M1/3641

  Pressure isolators · CPC title

• Y10T137/0402

  Cleaning, repairing, or assembling · CPC title

• A61M2205/07

  having air pumping means · CPC title

• Y10T137/85986

  Pumped fluid control · CPC title