Abstract:
A system, for use in determining a volume in a reservoir, includes a bulkhead, a plunger assembly, and a base. The plunger assembly is connected to the bulkhead. The plunger assembly includes a first plunger and a second plunger. The first plunger has a corresponding first biasing member. The second plunger has a corresponding second biasing member. The base of the reservoir is connected to the first plunger. Movement of the base causes compression or expansion of the first biasing member, which causes compression or expansion of the second biasing member. The bulkhead, the first plunger, and the base define a first portion of the reservoir. Positions of the first plunger and the base, relative to the bulkhead, are based on the volume in the reservoir.
Abstract:
A medical device delivers a therapy to a patient. The medical device or another device may periodically determine an activity level or gait parameter of the patient, and associate each determined level or parameter with a current therapy parameter set. A value of at least one activity metric is determined for each of a plurality of therapy parameter sets based on the activity levels or parameters associated with that therapy parameter set. Whether the patient is currently experiencing or anticipated to experience gait freeze caused by their neurological disorder, such as Parkinson's disease, may also be determined. Gait freeze events may be associated with current therapy parameters and used to determine activity metric values. In some examples, the activity metric associated with certain therapy parameters may be presented to a user.
Abstract:
A medical device delivers a therapy to a patient. Posture events are identified, e.g., a posture of the patient is periodically determined and/or posture transitions by the patient are identified, and each determined posture event is associated with a current therapy parameter set. A value of at least one posture metric is determined for each of a plurality of therapy parameter sets based on the posture events associated with that therapy parameter set. A list of the therapy parameter sets is presented to a user, such as a clinician, for evaluation of the relative efficacy of the therapy parameter sets. The list may be ordered according to the one or more posture metric values to aid in evaluation of the therapy parameter sets. Where values are determined for a plurality of posture metrics, the list may be ordered according to the one of the posture metrics selected by the user.