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US 2015/0306295 A1Published application
Extracorporeal blood circuit with non-invasive pressure sensor
AssigneeGambro Lundia AB
InventorPaolo Rovatti
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Abstract
Extracorporeal blood treatment apparatus (1) and methods as described herein involve control of blood line pressure utilizing a non-invasive pressure sensor (16).
Claims21
An apparatus configured to remove one or more substances from blood, wherein the apparatus comprises:
- a primary filter comprising a first semipermeable membrane separating a blood compartment from a dialysate loading compartment;
- a blood circuit having a blood line connected to the blood compartment of the primary filter;
- a non-invasive pressure sensor disposed about an exterior surface of the blood line, the non-invasive pressure sensor is configured to sense pressure in the blood line;
- and
- a control unit operably connected to the non-invasive pressure sensor and to control elements of the blood circuit, wherein the control unit is configured to:
- monitor a blood circuit pressure value using the non-invasive pressure sensor and operate the control elements of the blood circuit based on the monitored blood circuit pressure value.
3 more elements
3-22. (canceled)
An apparatus configured to remove one or more substances from blood, wherein the apparatus comprises:
- a primary filter comprising a first semipermeable membrane separating a blood compartment from a dialysate loading compartment;
- a blood circuit having a blood line connected to the blood compartment of the primary filter;
- a non-invasive pressure sensor disposed about an exterior surface of the blood line, the non-invasive pressure sensor being configured to sense pressure in the blood line, wherein the non-invasive pressure sensor comprises a sensing portion in direct contact with the exterior surface of the blood line and does not contact liquid in the blood line, such that the blood line may be removed from the non-invasive pressure sensor and reinserted into the non-invasive pressure sensor without interrupting the flow of liquid through the blood line;
- and
- a control unit operably connected to the non-invasive pressure sensor and to control elements of the blood circuit, wherein the control unit is configured to:
- monitor a blood circuit pressure value using the non-invasive pressure sensor,
- take action when at least one of a blood circuit pressure absolute value and blood circuit pressure gradient is not within a predetermined value range, wherein the control unit action comprises one or both of providing an alarm indication and altering a flow rate of the blood pump.
4 more elements
An apparatus configured to remove one or more substances from blood, wherein the apparatus comprises:
- a primary filter comprising a first semipermeable membrane separating a blood compartment from a dialysate loading compartment;
- a blood circuit having a blood line connected to the blood compartment of the primary filter;
- a non-invasive pressure sensor disposed about an exterior surface of the blood line, the non-invasive pressure sensor being configured to sense pressure in the blood line, wherein the non-invasive pressure sensor comprises a sensing portion in direct contact with the exterior surface of the blood line and does not contact liquid in the blood line, such that the blood line may be removed from the non-invasive pressure sensor and reinserted into the non-invasive pressure sensor without interrupting the flow of liquid through the blood line;
- and
- a control unit operably connected to the non-invasive pressure sensor and to control elements of the blood circuit, wherein the control unit is configured to:
- monitor a blood circuit pressure value using the non-invasive pressure sensor,
- take action when at least one of a blood circuit pressure absolute value and blood circuit pressure gradient is not within a predetermined value range, wherein the control unit action includes deactivating the blood pump when at least one of the following takes place:
- the monitored blood circuit pressure indicates that the blood circuit is not engaged with the non-invasive pressure sensor,
- the monitored blood circuit pressure is greater than a predetermined value.
6 more elements
Dependencies are inferred from the claim text.