Systems for applying a transcutaneous monitor to a person can include a telescoping assembly, a sensor, and a base with adhesive to couple the sensor to skin. The sensor can be located within the telescoping assembly while the base protrudes from a distal end of the system. The system can be configured to couple the sensor to the base by compressing the telescoping assembly.

Various analyte sensor systems for controlling activation of analyte sensor electronics circuitry are provided. Related methods for controlling analyte sensor electronics circuitry are also provided. Various analyte sensor systems for monitoring an analyte in a host are also provided. Various circuits for controlling activation of an analyte sensor system are also provided. Analyte sensor systems utilizing a state machine having a plurality of states for collecting a plurality of digital counts and waking a controller responsive to a wake up signal are also provided. Related methods for such analyte sensor systems are also provided. Systems for controlling activation of analyte sensor electronics circuitry utilizing a magnetic sensor are further provided. One or more display device configured to display one or more analyte concentration values are also provided.

Devices associated with on-body analyte sensor units are disclosed. These devices include any of packaging and/or loading systems, applicators and elements of the on-body sensor units themselves. Also, various approaches to connecting electrochemical analyte sensors to and/or within associated on-body analyte sensor units are disclosed. The connector approaches variously involve the use of unique sensor and ancillary element arrangements to facilitate assembly of separate electronics assemblies and sensor elements that are kept apart until the end user brings them together.

Implementations relate generally to devices for measuring an analyte in a host. Implementations may provide reduced sizes for wearable devices including a transcutaneous analyte sensor for analyte measurement.

A needle electrode fixation device is configured to secure a transdermal needle electrode to a patient. The device includes a base having a body that defines a first portion and a second portion. The first and second portions are rotatable relative to each other. The first portion defines a channel configured to fit a portion of the transdermal needle electrode. The second portion defines a recess configured to fit a tip of the needle electrode. The device further includes an adhesive layer configured to affix the base to the patient.

Systems and methods for delivering a drug or other therapy over an extended period of time (e.g., several hours, days, weeks, months, years, and so forth) are disclosed herein, as are systems and methods for monitoring various parameters associated with the treatment of a patient. Systems and methods are also disclosed herein that generally involve CED devices with various features for reducing or preventing backflow.

Disclosed herein are impedance-determining medical systems. An impedance-determining medical system can include an impedance interrogator and an impedance-sensing medical device. The impedance interrogator can include instructions configured to instantiate one or more processes in random-access memory upon processing by one or more processors that determine impedance from electrical signals corresponding to electrical currents passed through a biological or non-biological material. The impedance-sensing medical device can include two or more longitudinal conductors distributed among one or more pieces of the impedance-sensing medical device and separated by one or more longitudinal insulators. The two-or-more conductors can be configured to emit, detect, or alternately emit and detect via two or more electrodes thereof the electrical currents passed through the biological or non-biological material. The impedance-sensing medical device can be configured to form a direct or indirect connection to the impedance interrogator and provide the electrical signals to the impedance interrogator.

An analyte sensor and methods and systems related thereto, where at least one or more of a lower portion of a sensor tail substrate, at least one electrode, a sensing element, a membrane, and an optional non-electrochemical functional layer comprise an antimicrobial quality. Asymmetric, double-sided adhesive binders suitable for adhering the analyte sensor to a skin surface comprising a non-woven scrim, a first pressure-sensitive adhesive layer, a second pressure-sensitive adhesive layer. Overbandages comprising a vapor-permeable backing, an aperture to circumferentially surround a sensor housing, a contact adhesive layer, first and second peelable release liners, and a third peelable release liner disposed upon an anchoring adhesive strip of the contact adhesive layer.

A sensor includes: a needle member defining a hollow portion, wherein the needle member comprises a peripheral wall, and a through hole extends through the peripheral wall; an elongated detection member positioned in the hollow portion and extending along a longitudinal direction of the needle member; and at least one protruding portion that protrudes radially inward from the peripheral wall and restricts movement of the detection member in a radial direction.

An implantable sensor can be used for determining a concentration of at least one analyte in a medium, particularly in a body tissue and/or a body fluid. The implantable sensor can comprise a flexible, tubular sensor element. This sensor element has a tubular body on which at least two electrode rings are mounted for electrochemical determination of the concentration of the analyte.