Vented reservoir for medical pump

Inventors

Chappel, Eric • Allendes, Ricardo • Neftel, Frédéric

Assignees

Debiotech SA

Abstract

The present invention concerns a medical pump comprising: a. A hard housing comprising a top (24) and bottom (1) hard shells, within which a rigid wall (3) and a movable membrane (2) create three distinct chambers; wherein i. said movable membrane tightly separates said second (29) and third (22) chambers ii. said first and third chambers have a watertight interface iii. said second chamber (29) is designed to contain a fluid iv. said first chamber (23) comprises a first venting mean (20) which is arranged to provide a fluidic communication between said first chamber (23) and the external environment; v. said third chamber (22) comprises a second venting mean which is arranged to provide a fluidic communication between said third chamber (22) and the external environment b. A pumping element (4) located in the first chamber (23) c. A least one pressure sensor which measure the pressure gradient between the first chamber (23) and the second chamber (29) d. A fluid pathway which permits: i. a first fluid connection (27) between said second chamber (29) and said pumping element ii. a second fluid connection (28) between said pumping element and a patient line (30).

Core Innovation

The invention relates to a vented delivery medical device that includes a hard housing having a bottom hard shell and a top hard shell. The hard shell housing defines a first chamber, a second chamber intended to store a fluid to be delivered to a patient, and a third chamber separated by at least a movable membrane and a rigid wall, with the second chamber and the third chamber tightly separated by the movable membrane and the first chamber and the third chamber having a watertight interface.

The device provides a fluid pathway configured to provide fluid communication between the second chamber and the patient, and includes a pumping device configured to convey the fluid through the fluid pathway to the patient. An energy source for the pumping device is located in the first chamber, and a vent device is configured to vent at least one of the first chamber and the third chamber to the external environment of the delivery medical device.

The venting enables fluidic communication or pressure equilibration with air ambient between the first chamber and the air ambient and/or between the third chamber and the air ambient. Pressure sensing is provided, including a pressure transducer configured to measure fluid pressure in the fluid pathway and/or to enable measurement of a pressure gradient to detect underpressure and/or overpressure associated with vent clogging or venting conditions.

The vent device is further defined by venting structures intended to reduce clogging and maintain mechanical protection against water ingress, including vent passages with baffles and vent characteristics such as hydrophobic/oleophobic venting.

Claims Coverage

The independent claims are clm-00001, clm-00015, and clm-00028. Across these claims, the inventive coverage centers on a multi-chamber hard-housing arrangement with tight membrane/rigid-wall separation, a vent device venting one or more chambers to the external environment and/or air ambient for fluidic communication or pressure equilibration, and pumping with an energy source located in a vented/isolated chamber, optionally combined with pressure transducer-based sensing for underpressure/overpressure detection.

Across the independent claims, the core coverage is for a delivery medical device with hard-housing chambers tightly separated by a movable membrane and a rigid wall, a fluid pathway and pumping device to deliver fluid to a patient, and a vent device configured to vent the first and/or third chamber to the external environment/air ambient to achieve fluidic communication and/or pressure equilibration. The clm-00015 and clm-00028 independent claim sets further add a pressure transducer and an ambient-air communication requirement for at least one unit in the first chamber.

Stated Advantages

Documented Applications