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Publication Number
US-11547812-B2
Publication Date
2023-01-10
Expiration Date
Abstract
In one embodiment, an infusion set and sensor assembly delivered within a subject is disclosed. The assembly includes a cannula that is terminated at a cannula opening. The assembly further includes a sharp that is at least partially within the hollow of the cannula. A sensor having a proximal end and a distal end is also included in the assembly. The proximal end of the sensor is held in a fixed location while the distal end is retained with a portion of the cannula. The sensor further includes sensor slack, wherein transitioning the sharp from a first position to a second position simultaneously inserts the cannula and sensor to a desired insertion depth within a subject via a single point of insertion.
Core Innovation
The invention provides an infusion set and sensor assembly to be delivered within a subject using a single point of insertion. A cannula is terminated at a cannula opening, and a sharp is at least partially within the cannula. A sensor has a proximal end and a distal end, where the proximal end is held in a fixed location and the distal end is retained with a portion of the cannula.
The sensor further includes sensor slack defined as an amount of the sensor doubling back upon itself. During transition of the sharp from a first position to a second position, the cannula and sensor are simultaneously inserted to a desired insertion depth within the subject via the single point of insertion. During the transition, a change in the amount of sensor slack places the sensor within a channel and reinforces the cannula to prevent bending or kinking of the cannula.
The described structure includes a housing and base plate with a base opening/through hole, together with a base box and fluid box components. The disclosure further includes electrochemical sensor configurations, sensor slack unfurling into a cannula channel, and electrical connection using a circuit board and a contact stack with a moisture-impermeable sealant.
Claims Coverage
The partial content includes one independent claim, with dependent claims refining it. The independent claim has two core inventive aspects: coordinated simultaneous insertion via a single point of insertion during sharp transition, and using a defined change in sensor slack to place the sensor within a channel while reinforcing the cannula against bending or kinking.
Simultaneous insertion via single point of insertion during sharp transition
Transitioning the sharp from a first position to a second position simultaneously inserts the cannula and sensor to a desired insertion depth within the subject via a single point of insertion.
Slack change places sensor within a channel and reinforces cannula against bending or kinking
During the transition between the first position and the second position, there is a change in an amount of sensor slack that places the sensor within a channel and reinforces the cannula to prevent bending or kinking of the cannula.
Contained within a housing when positioned in the first position
The infusion set and sensor assembly are configured so that, when in a first position, the cannula, sharp, sensor, and sensor slack are contained within a housing.
Sensor proximal end attached to a circuit board within a housing
The infusion set and sensor assembly are configured so the sensor’s proximal end is attached to a circuit board inside a housing.
Moisture-impermeable seal attaching sensor proximal end to circuit board
The infusion set and sensor assembly include applying a moisture-impermeable seal to attach the proximal end of the sensor to the circuit board.
Insertion depth defined based on changes in amount of sensor slack
The infusion set and sensor assembly define cannula and sensor insertion depth based on changes in the amount of sensor slack.
Insertion-depth relationship where sharp insertion depth determines cannula and sensor insertion depth
The infusion set and sensor assembly include a defined relationship where the sharp’s insertion depth determines the insertion depth of the cannula and sensor.
Across the independent and dependent claims, the disclosure centers on coordinated delivery of a cannula and sensor using a single point of insertion driven by sharp transition, with sensor slack change used to place the sensor in a channel and reinforce the cannula against bending or kinking. Dependent claims further specify containment in a housing, attachment of the sensor proximal end to a circuit board using a moisture-impermeable seal, and insertion-depth definition based on sensor slack changes or a relationship to sharp insertion depth.
Stated Advantages
Reinforces the cannula to prevent bending or kinking of the cannula.
Places the sensor within a channel during transition of the sharp.
Documented Applications
Continuous glucose monitoring (CGM) / artificial pancreas system context is indicated by the documented entities and analytes referenced (e.g., glucose).
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