Sensor inserter having introducer
Methods, device and system for providing a sensor insertion assembly including an inserter housing, an introducer including a body portion having a proximal end and a distal end and a shaft portion comprising a channel and a distal end, the shaft portion extending downwardly from an edge of the body portion, the shaft portion including a holding member disposed along a length of the channel, the holding member configured to substantially releasably retain a sensor, an on-body electronics unit, wherein the introducer is configured for insertion of the sensor through an aperture in the on-body electronics unit prior to insertion through skin and a drive mechanism included in the inserter housing and operatively coupled to the introducer, wherein the drive mechanism drives the introducer and retained sensor through the skin are provided.
1. A sensor insertion assembly, comprising:
an inserter housing;
an introducer, the introducer including:
a body portion having a proximal end and a distal end; and
a shaft portion comprising a distal end and a sidewall forming a channel with a first longitudinal opening, the shaft portion extending downwardly from an edge of the body portion, the shaft portion including a second longitudinal opening through the sidewall, the second longitudinal opening located adjacent the first longitudinal opening;
a sensor comprising a sensor body and a flange, the flange configured to pass through the second longitudinal opening of the sidewall in a first direction, and the flange extending from the sensor body in a second direction transverse to the first direction such that, when the flange is passed through the second longitudinal opening, the sensor is substantially releasably retained to the introducer;
an on-body electronics unit configured to couple with the sensor; and
a spring included in the inserter housing and operatively coupled to the introducer,
wherein the spring is configured to move the introducer and retained sensor into a body of a subject; and
wherein the second longitudinal opening includes a first section that is wider than a width of the flange and a second section that is narrower than the width of the flange, wherein the sensor is releasable from the introducer when the flange is positioned along the first section and wherein the sensor is retained to the introducer when the flange is positioned along the second section.
2. The sensor insertion assembly of claim 1 , wherein the second longitudinal opening includes a section that is wider than a width of the flange such that the sensor may be released from the shaft.
3. The sensor insertion assembly of claim 1 , wherein the shaft portion is substantially hollow.
4. The sensor insertion assembly of claim 1 , wherein the shaft portion is configured to retain at least a portion of the sensor substantially subcutaneously when the shaft portion is removed from a skin layer.
5. The sensor insertion assembly of claim 1 , wherein the distal end of the shaft portion includes a tapered end configured to pierce the body of the subject, and further, wherein the sensor insertion assembly is configured such that at least a portion of the sensor is substantially retained within the shaft portion while the tapered end pierces the body of the subject.
6. The sensor insertion assembly of claim 5 , wherein the sensor insertion assembly is configured such that when the tapered end of the shaft portion is introduced to the body of the subject, the sensor is substantially contemporaneously introduced to the body of the subject.
7. The sensor insertion assembly of claim 1 , wherein the sensor includes an analyte sensor.
8. The sensor insertion assembly of claim 7 , wherein the analyte sensor is a glucose sensor.
9. The sensor insertion assembly of claim 7 , wherein the introducer is configured to position the analyte sensor in fluid contact with an analyte of a user.
10. The sensor insertion assembly of claim 1 , wherein the second longitudinal opening includes a section that is wider than a width of the flange and a section that is narrower than the width of the flange.
11. The sensor insertion assembly of claim 1 , wherein the sensor body is adapted to reside in the first longitudinal opening after the flange is passed through the second longitudinal opening.
12. The sensor insertion assembly of claim 1 , wherein the flange extends at a right angle from an edge of the sensor body.