Patent application number | Description | Published |
20080243093 | DETECTING NEEDLE ENTRY INTO A PORT OF AN INFUSION DEVICE - Systems for detecting needle insertion into a port chamber of an implantable medical device include a pressure sensor. The system detects characteristic pressure profiles associated with needle insertion into the port chamber through a septum and may generate a sensory cue to a clinician that proper needle placement has been achieved. Methods for detecting needle insertion into a port chamber of an implantable medical device includes detecting characteristic pressure profiles associated with needle insertion into the port chamber through a septum. | 10-02-2008 |
20080267796 | Residual energy recovery in a drug delivery device - An implantable drug delivery device includes a pump motor that is driven by electrical energy from a storage capacitor. At the end of each pump delivery cycle, electrical energy stored in the pump motor is recovered and returned to the storage capacitor, so that it can be used in subsequent delivery cycles. | 10-30-2008 |
20080269724 | Implantable drug delivery device with programmable rate capacitor charge control - An implantable drug delivery device includes a pump motor that is asserted by drive currents from a storage capacitor. A programmable rate charge control delivers charging current from a battery to the storage capacitor based upon a programmable charge rate value, a minimum battery voltage value, sensed charging current, and sensed battery voltage. When sensed battery voltage droops to below a threshold value, the charge control reduces the charging rate value until other electrical loads within the drug device have been serviced and battery voltage is restored. The charge control also monitors capacitor voltage and provides a charge complete signal to a motor control, which then connects the pump motor to the storage capacitor to produce a pump stroke. Efficiency of charging is enhanced by controlling the charging at a programmable substantially constant rate. | 10-30-2008 |
20080281279 | SEPTUM PORT LOCATOR SYSTEM AND METHOD FOR AN IMPLANTABLE THERAPEUTIC SUBSTANCE DELIVERY DEVICE - An implantable medical device system includes an implantable device and an external locator device for percutaneously locating detecting port opening of the implantable device. The implantable device includes a port chamber forming the port opening, a septum sealing the port chamber relative to an exterior of the device, and a coil positioned at a known location relative to the port opening. The locator device includes a controller, at least one X-loop electrically coupled to the controller and oriented along a first major axis, and at least one Y-loop electrically coupled to the controller and oriented along a second major axis differing from the first major axis. The system is configured such that when the locator is spatially proximate the coil, an induced voltage in at least the Y-loop(s) is read by the controller to indicate a location of the coil relative to the locator device. | 11-13-2008 |
20080294098 | End of stroke detection for electromagnetic pump - Detection of end of stroke for an electromagnetic pump is performed using, for example, a calculated first flux derivative. | 11-27-2008 |
20090082834 | PROXIMITY SIGNATURE FOR SECURE COMMUNICATION WITH IMPLANTABLE MEDICAL DEVICE - Systems, devices and methods employing coded magnetic fields or transfer of encryption key information via proximity telemetry are described. The systems, methods and devices help prevent or reduce unintended or unintentional distance telemetry communication between an external medical device and an implantable medical device. | 03-26-2009 |
20100331669 | SEPTUM PORT LOCATOR SYSTEM AND METHOD FOR AN IMPLANTABLE THERAPEUTIC SUBSTANCE DELIVERY DEVICE - An implantable medical device system includes an implantable device and an external locator device for percutaneously locating detecting port opening of the implantable device. The implantable device includes a port chamber forming the port opening, a septum sealing the port chamber relative to an exterior of the device, and a coil positioned at a known location relative to the port opening. The locator device includes a controller, at least one X-loop electrically coupled to the controller and oriented along a first major axis, and at least one Y-loop electrically coupled to the controller and oriented along a second major axis differing from the first major axis. The system is configured such that when the locator is spatially proximate the coil, an induced voltage in at least the Y-loop(s) is read by the controller to indicate a location of the coil relative to the locator device. | 12-30-2010 |
20110184354 | DETECTING NEEDLE ENTRY INTO A PORT OF AN INFUSION DEVICE - Systems for detecting needle insertion into a port chamber of an implantable medical device include a pressure sensor. The system detects characteristic pressure profiles associated with needle insertion into the port chamber through a septum and may generate a sensory cue to a clinician that proper needle placement has been achieved. Methods for detecting needle insertion into a port chamber of an implantable medical device includes detecting characteristic pressure profiles associated with needle insertion into the port chamber through a septum. | 07-28-2011 |
20110237935 | Method and Apparatus for Guiding an External Needle to an Implantable Device - A system can include an implantable device, an instrument, a display device and a processor. The implantable device can include a port and a localizer for generating a navigation field. The instrument can include a tracking device for sensing the navigation field. The processor can be operably coupled to the tracking and display devices and operable to determine a real-time location of the instrument relative to the port and a trajectory of the instrument relative to an insertion axis of the port. The processor system can be operable to cause the display device to graphically render the instrument as a plurality of two or three-dimensional rings positioned around an axis coincident with the determined trajectory and in spaced relation to each other along the axis. A first ring of the plurality of rings can be positioned at the determined instrument location relative to a graphical representation of the port location. | 09-29-2011 |
20110237936 | Method and Apparatus for Guiding an External Needle to an Implantable Device - A support tool or a supply assembly that delivers a functional fluid to a patient includes an antenna array for receiving or sensing a navigation field. The navigation field can be generated from a localizer. The localizer can be incorporated or included in an implanted device. | 09-29-2011 |
20110237937 | Method and Apparatus for Guiding an External Needle to an Implantable Device - A system to generate a navigation field relative to an implanted device is disclosed. The system can include a small and/or thin localizer array positioned in the implanted device. A power management scheme and circuits can be provided to conserve and resource power in the implanted device. | 09-29-2011 |
20110238034 | Method and Apparatus for Guiding an External Needle to an Implantable Device - A support tool for a supply assembly delivers a functional fluid to an implantable medical device. The supply assembly defines a supply axis. The support tool includes a support member defining an opening. The opening has a support axis, and the opening is configured to receive the supply assembly. The support member includes a three dimensionally contoured nesting surface that conforms to a corresponding three dimensionally contoured surface of the supply assembly. The corresponding surface of the supply assembly nests against the nesting surface to support the supply assembly such that the supply axis remains substantially fixed relative to and aligned with the support axis. | 09-29-2011 |
20110264006 | Detecting Empty Medical Pump Reservoir - A medical device system comprises a reservoir configured to store a therapeutic fluid and a medical pump configured to deliver the therapeutic fluid from the reservoir to a patient. The system also comprises a sensor that can detect a characteristic associated with the pump and a processor to determine if the characteristic detected indicates the reservoir is empty or near empty. The characteristic may comprise a property associated with the energization of an actuation mechanism configured to be energized to provide a pump stroke. The characteristic may also comprise a characteristic of a noise made by an actuator within the pump at the end of a pump stroke. | 10-27-2011 |
20110280737 | END OF STROKE DETECTION FOR ELECTROMAGNETIC PUMP - Detection of end of stroke for an electromagnetic pump is performed using, for example, a calculated first flux derivative. | 11-17-2011 |
20120109099 | IMPLANTABLE MEDICAL PUMP DIAGNOSTICS - A method of detecting a fault condition within an implantable medical pump comprises delivering therapeutic fluid using a medical pump comprising an actuation mechanism configured to be energized to provide a pump stroke, detecting a property associated with energizing the actuation mechanism, and determining whether the property associated with energizing the actuation mechanism indicates that a fault condition exists with the medical pump. | 05-03-2012 |
20120277716 | DETECTING AND RESPONDING TO SOFTWARE AND HARDWARE ANOMALIES IN A FLUID DELIVERY SYSTEM - A total dose of a therapeutic agent to be delivered to a patient by an infusion device over a total period of time is automatically divided into a plurality of unit doses to be delivered to the patient over a plurality of unit periods of time. The infusion device is automatically programmed to deliver one of the unit doses of the therapeutic agent to the patient over its respective unit period of time, after which the one unit dose is delivered, and a determination is made of whether an error occurred in delivering the one unit dose to the patient. Delivery of the total dose of the therapeutic agent to the patient may include iteratively automatically programming the infusion device to deliver successive unit doses upon determining that no error occurred in delivering a previous unit dose to the patient. Accordingly, the risk of improperly dosing the patient with the therapeutic agent in an event of a software or hardware anomaly within the infusion device is prevented or reduced. | 11-01-2012 |
20120283639 | DETECTING EMPTY MEDICAL PUMP RESERVOIR - A medical device system comprises a reservoir configured to store a therapeutic fluid and a medical pump configured to deliver the therapeutic fluid from the reservoir to a patient. The system also comprises a sensor that can detect a characteristic associated with the pump and a processor to determine if the characteristic detected indicates the reservoir is empty or near empty. The characteristic may comprise a characteristic of a noise made by an actuator within the pump at the end of a pump stroke. | 11-08-2012 |
20130289539 | Power Management System for a Piston-Based Implantable Infusion Pump - An implantable infusion device includes a pump, a charge storage unit, and a charging circuit configured to supply current to the charge storage unit from a battery in preparation for actuating the pump. The implantable infusion device also includes a pump actuator circuit configured to actuate the pump using energy from the charge storage unit, and a voltage boost circuit configured to provide a boosted battery voltage generated from the battery. The charging circuit is configured to supply current to the charge storage unit from the voltage boost circuit instead of directly from the battery in response to (i) a comparison of a voltage of the battery with a predetermined threshold and (ii) a comparison of a voltage of the charge storage unit with the voltage of the battery. | 10-31-2013 |
20130296830 | Method And Apparatus For Guiding An External Needle To An Implantable Device - A support tool for a supply assembly delivers a functional fluid to an implantable medical device. The supply assembly defines a supply axis. The support tool includes a support member defining an opening. The opening has a support axis, and the opening is configured to receive the supply assembly. The support member includes a three dimensionally contoured nesting surface that conforms to a corresponding three dimensionally contoured surface of the supply assembly. The corresponding surface of the supply assembly nests against the nesting surface to support the supply assembly such that the supply axis remains substantially fixed relative to and aligned with the support axis. | 11-07-2013 |
20130303896 | Method And Apparatus For Guiding An External Needle To An Implantable Device - A system can include an implantable device, an instrument, a display device and a processor. The implantable device can include a port and a localizer for generating a navigation field. The instrument can include a tracking device for sensing the navigation field. The processor can be operably coupled to the tracking and display devices and operable to determine a real-time location of the instrument relative to the port and a trajectory of the instrument relative to an insertion axis of the port. The processor system can be operable to cause the display device to graphically render the instrument as a plurality of two or three-dimensional rings positioned around an axis coincident with the determined trajectory and in spaced relation to each other along the axis. A first ring of the plurality of rings can be positioned at the determined instrument location relative to a graphical representation of the port location. | 11-14-2013 |
20140153719 | PROXIMITY SIGNATURE FOR SECURE COMMUNICATION WITH IMPLANTABLE MEDICAL DEVICE - Systems, devices and methods employing coded magnetic fields or transfer of encryption key information via proximity telemetry are described. The systems, methods and devices help prevent or reduce unintended or unintentional distance telemetry communication between an external medical device and an implantable medical device. | 06-05-2014 |
20140276573 | Filling Methods and Apparatus for Implanted Medical Therapy Delivery Devices - Transdermal insertion of a transcutaneous filling apparatus, for the purpose of filling a fill chamber of an implanted therapy delivery device, is monitored by measuring each impedance between pairs of electrodes of a needle of the apparatus, and comparing each to a threshold impedance; the electrodes, preferably at least three in number, are isolated and spaced apart from one another along a length of the needle. A confirmation signal is generated when at least one of the measured impedances is greater than the threshold impedance, and another is less than the threshold, the condition indicating that one of the electrodes is located within a non-conductive septum, through which the apparatus must pass to access the fill chamber. A detection circuit, which may be located in a housing of the apparatus that is attached to a proximal end of the needle, measures and compares the impedances. | 09-18-2014 |