Implantable, refillable infusion device and spetum replacement kit
First Claim
1. An implantable infusion device, comprising:
- a housing including an inner wall and having an interior region defined at least in pat by the inner wall, at least a portion of the interior region defining an infusate reservoir adapted to store an infusate therein for delivery to a patient;
a closed variable volume chamber having an outer wall, the variable volume chamber disposed within the interior region of the housing with the outer wall of the variable volume chamber being spaced from the inner wall of the housing, the variable volume chamber being supported within the interior region from an internal portion of the inner wall of the housing;
a pressure source contained within the variable volume chamber;
an infusate recharging fluid flow path adapted to recharge the infusate reservoir by carrying infusate to the infusate reservoir through the internal portion of the housing from which the variable volume chamber is supported within the interior region; and
an exit fluid flow path adapted to deliver infusate from the infusate reservoir out of the housing.
13 Assignments
0 Petitions
Accused Products
Abstract
An implantable infusion device (10) includes a lightweight, inert housing (12) which contains an infusate (18) for administration to a patient, and an enclosed, gas-impermeable variable volume chamber (30) which contains a pressure source, such as propellant, mechanical spring, or the like. The variable volume chamber may be in the form of a rigid-walled expandable bellows structure or a nonstretchable flexible bag and is attached to the housing so as not to obstruct the entry port for introduction of A recharging fluid flow path (31) is provided adjacent to where the variable volume chamber is attached to the housing. The infusate is delivered from the device via a catheter in response to expansion of the variable volume chamber against the volume of infusate in the housing. A separate bolus injection port (38) is provided which allows infusate to be safely introduced directly into the catheter and overrides the controlled pressure-driven delivery. The lightweight housing may include integrally formed needle stops (32 and 34) and suture fastening loops (36).
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Citations
49 Claims
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1. An implantable infusion device, comprising:
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a housing including an inner wall and having an interior region defined at least in pat by the inner wall, at least a portion of the interior region defining an infusate reservoir adapted to store an infusate therein for delivery to a patient;
a closed variable volume chamber having an outer wall, the variable volume chamber disposed within the interior region of the housing with the outer wall of the variable volume chamber being spaced from the inner wall of the housing, the variable volume chamber being supported within the interior region from an internal portion of the inner wall of the housing;
a pressure source contained within the variable volume chamber;
an infusate recharging fluid flow path adapted to recharge the infusate reservoir by carrying infusate to the infusate reservoir through the internal portion of the housing from which the variable volume chamber is supported within the interior region; and
an exit fluid flow path adapted to deliver infusate from the infusate reservoir out of the housing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. An implantable infusion device, comprising:
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a housing including an inner wall and having an interior region defined at least in part by the inner wall, at least a portion of the interior region defining an infusate reservoir adapted to store an infusate therein for delivery to a patient;
a closed variable volume chamber having an outer wall, the variable volume chamber disposed within the interior region of the housing with the outer wall of the variable volume chamber being spaced from the inner wall of the housing, the variable volume chamber being supported within the interior region from an internal portion of the inner wall of the housing;
a pressure source contained within tie variable volume chamber;
an infusate recharging fluid flow path adapted to recharge the infusate reservoir by directing infusate into the infusate reservoir;
an exit fluid flow path adapted to carry infusate from the infusate reservoir out of the housing; and
a bolus port in fluid communication with the exit fluid flow path. - View Dependent Claims (31, 32, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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33. The implantable infusion device according to clam 32, further comprising a recharging fluid reservoir disposed along the infusate recharging fluid flow path.
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45. An implantable infusion device, comprising:
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a housing including an inner wall and having an interior region defined at least in part by the inner wall, at least a portion of the interior region defining an infusate reservoir adapted to store an infusate therein for delivery to a patient;
a closed variable volume chamber free-floating within the interior region of the housing;
a pressure source contained within the variable volume chamber;
a fluid flow path adapted to carry infusate between a point external to the housing and the interior region of the housing; and
a spacer supported by at least one of the housing and the variable volume chamber to maintain the fluid flow path unobstructed by the variable volume chamber. - View Dependent Claims (46, 47, 48, 49)
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Specification