Implantable infusion devices including apparatus for confirming side port access
First Claim
Patent Images
1. An implantable infusion device, comprising:
- a housing;
a reservoir within the housing;
a reservoir refill port on the housing and connected to the reservoir;
a pump mechanism located within the housing and connected to the reservoir;
an outlet port configured to have a catheter connected thereto;
a passageway that connects the outlet port to the pump mechanism;
a catheter access port on the housing and connected to the passageway at a location between the pump mechanism and the outlet port;
a pressure sensor within the housing and connected to the passageway at a location between the pump mechanism and the outlet port; and
means for determining that the catheter access port has been accessed by a needle based on a decrease in pressure in the passageway at the location between the pump mechanism and the outlet port below a baseline pressure measured by the pressure sensor.
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Accused Products
Abstract
Implantable infusion devices and systems with side port access detection capability and methods of detecting side port access.
8 Citations
16 Claims
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1. An implantable infusion device, comprising:
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a housing; a reservoir within the housing; a reservoir refill port on the housing and connected to the reservoir; a pump mechanism located within the housing and connected to the reservoir; an outlet port configured to have a catheter connected thereto; a passageway that connects the outlet port to the pump mechanism; a catheter access port on the housing and connected to the passageway at a location between the pump mechanism and the outlet port; a pressure sensor within the housing and connected to the passageway at a location between the pump mechanism and the outlet port; and means for determining that the catheter access port has been accessed by a needle based on a decrease in pressure in the passageway at the location between the pump mechanism and the outlet port below a baseline pressure measured by the pressure sensor. - View Dependent Claims (2, 3, 4, 5)
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6. An implantable infusion device, comprising:
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a housing; a reservoir within the housing; a reservoir refill port on the housing and connected to the reservoir; a pump mechanism located within the housing and connected to the reservoir; an outlet port configured to have a catheter connected thereto; a passageway that connects the outlet port to the pump mechanism; a catheter access port on the housing and connected to the passageway at a location between the pump mechanism and the outlet port; a pressure sensor within the housing, outside of the catheter access port, and connected to the passageway at a location between the pump mechanism and the outlet port; an alarm; and a control apparatus configured to store a pressure sensed by the pressure sensor as a baseline pressure in response to a signal from a remote device, to calculate a low threshold pressure based on the baseline pressure, and to determine that the catheter access port has been accessed by a needle and actuate the alarm if a pressure subsequently sensed by the pressure sensor decreases below the baseline pressure to the low threshold pressure. - View Dependent Claims (7, 8, 9)
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10. An implantable infusion device system, comprising:
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an implantable infusion device including a housing, a reservoir within the housing, a reservoir refill port on the housing and connected to the reservoir, a pump mechanism located within the housing and connected to the reservoir, an outlet port configured to have a catheter connected thereto, a passageway that connects the outlet port to the pump mechanism, a catheter access port on the housing and connected to the passageway at a location between the pump mechanism and the outlet port, and a pressure sensor within the housing and connected to the passageway at a passageway location spaced apart from the catheter access port and between the pump mechanism and the outlet port; a remote control configured to communicate with the implantable infusion device; and a control apparatus configured to determine that the catheter access port has been accessed by a needle based on a decrease in pressure below a baseline pressure measured by the pressure sensor. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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Specification