FLUID RESERVOIR SEATING PROCEDURE FOR A FLUID INFUSION DEVICE
First Claim
1. A method of seating a fluid reservoir in a housing of a fluid infusion device prior to establishing an outgoing fluid flow path from the fluid reservoir, the fluid infusion device comprising a drive motor assembly for the fluid reservoir, the method comprising:
- detecting insertion of the fluid reservoir into the housing;
in response to the detecting, determining whether the fluid reservoir is in need of depressurization;
when the fluid reservoir is in need of depressurization, rewinding the drive motor assembly to depressurize the fluid reservoir;
after depressurizing the fluid reservoir, achieving an equilibrium state for the fluid reservoir; and
after achieving the equilibrium state, advancing the drive motor assembly to obtain an initial seated state for the fluid reservoir.
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Accused Products
Abstract
A method of seating a fluid reservoir in a housing of a fluid infusion device is presented here. The method is performed prior to establishing an outgoing fluid flow path from the fluid reservoir. The method begins by detecting insertion of the fluid reservoir into the housing of the fluid infusion device. In response to detecting the insertion, the method determines whether the fluid reservoir is in need of depressurization. When the fluid reservoir is in need of depressurization, the drive motor assembly of the fluid infusion device is rewound to depressurize the fluid reservoir. After depressurizing the fluid reservoir, an equalization state for the fluid reservoir is achieved. After achieving the equilibrium state, the drive motor assembly is advanced to obtain an initial seated state for the fluid reservoir.
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Citations
23 Claims
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1. A method of seating a fluid reservoir in a housing of a fluid infusion device prior to establishing an outgoing fluid flow path from the fluid reservoir, the fluid infusion device comprising a drive motor assembly for the fluid reservoir, the method comprising:
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detecting insertion of the fluid reservoir into the housing; in response to the detecting, determining whether the fluid reservoir is in need of depressurization; when the fluid reservoir is in need of depressurization, rewinding the drive motor assembly to depressurize the fluid reservoir; after depressurizing the fluid reservoir, achieving an equilibrium state for the fluid reservoir; and after achieving the equilibrium state, advancing the drive motor assembly to obtain an initial seated state for the fluid reservoir. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of seating a fluid reservoir in a housing of a fluid infusion device prior to establishing an outgoing fluid flow path from the fluid reservoir, the fluid infusion device comprising a drive motor assembly, an actuation mechanism operatively coupled to the drive motor assembly for actuation of a plunger of the fluid reservoir, and a force sensor operatively coupled to the actuation mechanism, the method comprising:
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detecting insertion of the fluid reservoir into the housing, wherein insertion of the fluid reservoir into the housing causes a shaft of the plunger to engage the actuation mechanism; after detecting insertion of the fluid reservoir, obtaining a first measure of force using the force sensor, wherein the first measure of force is associated with interaction of the shaft with the actuation mechanism; comparing the first measure of force to a first threshold force value; when the first measure of force is greater than the first threshold force value, depressurizing the fluid reservoir; after depressurizing the fluid reservoir, or when the first measure of force is not greater than the first threshold force value, rewinding the drive motor assembly to achieve an equilibrium state for the fluid reservoir; and after rewinding the drive motor assembly to achieve the equilibrium state, advancing the drive motor assembly to obtain an initial seated state for the fluid reservoir. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A fluid infusion device comprising:
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a housing that receives a sealed fluid reservoir, the fluid reservoir comprising a plunger and a shaft coupled to the plunger; a drive motor assembly in the housing; an actuation mechanism in the housing, wherein the actuation mechanism is operatively coupled to the drive motor assembly; a force sensor in the housing and operatively coupled to the actuation mechanism to obtain measures of force associated with interaction of the shaft with the actuation mechanism; and at least one processor in the housing and operatively coupled to the drive motor assembly and the force sensor, wherein the at least one processor; detects insertion of the fluid reservoir into the housing; thereafter, incrementally rewinds the drive motor assembly to achieve an equilibrium state for the fluid reservoir; thereafter, advances the drive motor assembly and obtains at least one measure of force using the force sensor until the at least one measure of force indicates that the fluid reservoir has reached an initial seated state; thereafter, performs a stabilizing cycle with the drive motor assembly to stabilize the fluid reservoir; and thereafter, advances the drive motor assembly and obtains at least one subsequent measure of force using the force sensor until the at least one subsequent measure of force indicates that the fluid reservoir has reached a subsequent sealed state. - View Dependent Claims (20, 21)
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22. A method of seating a fluid reservoir in a housing of a fluid infusion device prior to establishing an outgoing fluid flow path from the fluid reservoir, the fluid infusion device comprising a drive motor assembly, an actuation mechanism operatively coupled to the drive motor assembly for actuation of a plunger shaft of the fluid reservoir, and a force sensor operatively coupled to the actuation mechanism, the method comprising:
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obtaining a first measure of force using the force sensor, wherein the first measure of force is associated with interaction of the plunger shaft with the actuation mechanism; determining that the first measure of force is greater than a first threshold force value; in response to the determining, depressurizing the fluid reservoir by rewinding the drive motor assembly by a first rewind amount; after depressurizing the fluid reservoir, rewinding the drive motor assembly by a second rewind amount to achieve an equilibrium state for the fluid reservoir; after rewinding the drive motor assembly by the second amount, advancing the drive motor assembly by a first forward amount to obtain an initial seated state for the fluid reservoir; after obtaining the initial seated state, advancing the drive motor assembly by a second forward amount; after advancing the drive motor assembly by the second forward amount, rewinding the drive motor assembly by a third rewind amount to stabilize the fluid reservoir; after rewinding the drive motor assembly by the third rewind amount, advancing the drive motor assembly by a third forward amount to obtain a subsequent seated state for the fluid reservoir. - View Dependent Claims (23)
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Specification