Ventricular assist devices and methods
AssigneeVitalmex Internacional S.A. De C.V.
InventorsAdrian Beltrán Calva, Cynthia Denisse Anaya Romo, Jesús Salvador Carlos Robles
Life of this patent
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Abstract
Embodiments include Ventricular Assist Devices (VADs) with clips that help hold a cannula to the VAD. In some embodiments the clip embraces a cannula that has been placed around a cannula connector. In further embodiments an additional clip connects the first clip to the VAD housing preventing the first clip from slipping. The clip and additional clip may form a single piece. Further embodiments include a blood pumping sac located inside a cavity in the VAD forming one or more air chambers between the sac and the cavity walls, and an airflow channel leading from the air chambers to an airflow port allowing the sac to be evenly pressurized and depressurized.
Claims28
A medical pump, comprising:
- a pump housing defining an interior chamber, a pump inlet and a pump outlet;
- a fluid sac disposed in the interior chamber and connected to the pump inlet and the pump outlet, the fluid sac defining an interior volume;
- wherein fluid entering the pump moves through the pump inlet and enters the fluid sac increasing the interior volume of the fluid sac;
- wherein fluid leaving the pump exits the fluid sac and moves through the pump outlet decreasing the interior volume of the fluid sac;
- and
- means for connecting a cannula to the pump inlet or the pump outlet, wherein said means for connecting a cannula includes a cannula holder configured to embrace the cannula.
A medical pump, comprising:
- a pump housing defining an interior chamber, a pump inlet and a pump outlet;
- a fluid sac disposed in the interior chamber and connected to the pump inlet and the pump outlet, the fluid sac defining an interior volume;
- wherein fluid entering the pump moves through the pump inlet and enters the fluid sac increasing the interior volume of the fluid sac;
- wherein fluid leaving the pump exits the fluid sac and moves through the pump outlet decreasing the interior volume of the fluid sac;
- and
- means for connecting a cannula to the pump inlet or the pump outlet
- wherein the pump housing further defines
- a cannula connector and an airflow channel, the airflow channel pneumatically connecting the interior chamber to the external environment, wherein the cannula connector is connected to the pump inlet or the pump outlet,
- wherein air flowing into the interior chamber through the airflow channel creates pressure on the sac to decrease the interior volume of the sac and air flowing out from the interior chamber decreases pressure on the sac to increase the interior volume of the sac;
- the medical pump further comprising:
- means for increasing friction between the cannula connector and the cannula.
A medical pump, comprising:
- a pump housing defining an interior chamber, a pump inlet and a pump outlet;
- a fluid sac disposed in the interior chamber and connected to the pump inlet and the pump outlet, the fluid sac defining an interior volume;
- wherein fluid entering the pump moves through the pump inlet and enters the fluid sac increasing the interior volume of the fluid sac;
- wherein fluid leaving the pump exits the fluid sac and moves through the pump outlet decreasing the interior volume of the fluid sac;
- and
- means for connecting a cannula to the pump inlet or the pump outlet, wherein said means for connecting a cannula includes
- a cavity defined by the pump housing;
- a cannula connector configured for insertion into a cannula;
- a cannula holder defining a first clasp and a second clasp, wherein
- the cannula holder is configured to embrace a cannula,
- the first clasp defines two ends configured to connect to one another,
- the first clasp is configured to fully surround a cannula that is embraced by the cannula holder when the two ends are connected to one another,
- the second clasp extends in a direction substantially parallel to a central axis of a cannula that is embraced by the cannula holder, and
- the second clasp is configured for insertion into the pump housing cavity, and movement of the cannula holder is restrained in a direction substantially parallel to a central axis of a cannula that is embraced by the cannula holder when the second clasp is inserted into the pump housing cavity.
Dependencies are inferred from the claim text.