Dose control device for injectable-drug delivery devices
Inventors
MARCOZ, Alain • JEZ, Emmanuel • DIOGO, Sylvain • GOURBET, Patrice • Pereira, Alexandre • POLLARD, Mathieu • GILLET, Kévin
Assignees
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Publication Number
US-11511045-B2
Publication Date
2022-11-29
Expiration Date
Abstract
A dose control device adapted to be removably mounted onto an exterior peripheral surface of an injectable drug delivery device, the drug delivery device including a substantially elongate drug delivery body, at least one injectable drug held by the body, the body having a distal and proximal extremity. The dose control device includes a first component configured to fit and substantially encase at least a portion of an exterior peripheral surface of the drug delivery device, and located at a proximal extremity of the drug delivery device; a second component configured to fit and substantially encase a corresponding remaining unencased portion of the exterior peripheral surface of the drug delivery device, and also located at a proximal extremity of the drug delivery device. The first component and the second component removably engage with each other to form a unit having a longitudinal bore that extends along a longitudinal axis of the drug delivery device, and in which bore the drug delivery device is encased between the first component and the second component.
Core Innovation
A dose control device is adapted to be removably mounted onto an exterior peripheral surface of a drug delivery device. The drug delivery device includes a body extending along a longitudinal axis with a distal and proximal extremity, and a dose selector wheel rotatably mounted outside the body at the proximal extremity. Rotation of the dose selector wheel provides longitudinal displacement of a dose selector shaft along the longitudinal axis, and the removable dose control device is mounted at the proximal extremity.
The dose control device includes a first component and a second component that fit and encase first and second portions of the circumference of the exterior peripheral surface at the proximal extremity. The first component and the second component removably engage with each other to form a unit having a longitudinal bore that extends along the longitudinal axis, so that the entire circumference at the proximal extremity is encased between them. The first component and the second component are configured to snugly fit the exterior peripheral surface to preclude displacement of any portion of the components relative to the body.
An annular component is mounted on the dose selector wheel along the longitudinal axis and is configured to impart rotational movement about the longitudinal axis to the dose selector wheel and the dose selector shaft. The annular component has means for producing a three-dimensional magnetic field, and magnetic field detection means are mounted in one of the first and second components and are configured to detect changes in the magnetic field produced by the means for producing a three-dimensional magnetic field.
An integrated processing unit is connected to the magnetic field detection means and is configured for calculating a position of the means for producing a three-dimensional magnetic field with respect to the magnetic field detection means in accordance with the detected changes in the magnetic field. The system can additionally use displacement detection means configured to measure a relative displacement or relative movement of the drug delivery device in a predetermined direction.
Claims Coverage
Independent claim clm-00001 is directed to a removable dose control device with an annular three-dimensional magnetic field source on a dose selector wheel and magnetic field detection in the removable housing, where an integrated processing unit calculates the position in accordance with detected magnetic-field changes. Dependent claims further refine the magnetic sensing and add displacement detection and other supporting subsystem features.
Removably encased proximal housing with longitudinal bore
A first component configured to fit and encase a first portion of a circumference of an exterior peripheral surface of the body at the proximal extremity, and a second component configured to fit and encase a second portion of the circumference at the proximal extremity, where the first and second components removably engage to form a unit having a longitudinal bore extending along the longitudinal axis such that the entire circumference at the proximal extremity is encased, and the components snugly fit the exterior peripheral surface to preclude displacement relative to the body.
Annular three-dimensional magnetic field producing component on dose selector wheel
An annular component mounted on the dose selector wheel along the longitudinal axis and configured to impart rotational movement about the longitudinal axis to the dose selector wheel and to the dose selector shaft, and having means for producing a three-dimensional magnetic field.
Magnetic field detection means in removable housing
Magnetic field detection means mounted in one of the first and second components and configured to detect changes in the magnetic field produced by the means for producing a three-dimensional magnetic field.
Integrated processing unit calculating position from magnetic field changes
An integrated processing unit connected to the magnetic field detection means and configured for calculating a position of the means for producing a three-dimensional magnetic field with respect to the magnetic field detection means in accordance with the changes in the magnetic field.
Magnetometer-based magnetic field detection
The magnetic field detection means include at least one magnetometer.
Parallel magnetometer simultaneous detection of 3D magnetic field changes
Magnetic-field detection using at least first and second magnetometers operated in parallel to simultaneously detect magnetic-field changes as the three-dimensional magnetic field producing means is moved away from or toward the magnetometers.
Series magnetometer detection with predetermined threshold trigger
Magnetic-field detection uses first and second magnetometers operated in series, where the first magnetometer detects until a predetermined magnetic-field value is reached and then triggers the second magnetometer to detect changes beyond that value as the three-dimensional magnetic field producing means is moved toward or away from the magnetometers.
Displacement detection of relative movement in predetermined direction
Displacement detection means configured to measure a relative displacement or relative movement of the drug delivery device in a predetermined direction.
Annular magnet with diametrically opposed opposite-polarity poles for 3D magnetic field
Generating a three-dimensional magnetic field is performed using an annular magnet having two diametrically opposed poles of opposite polarity.
Across the claims, the core structure is a removable proximal housing that encases a dose selector wheel assembly portion, combined with an annular component producing a three-dimensional magnetic field and magnetic-field detection in the removable housing. An integrated processing unit calculates the position based on detected magnetic-field changes, with dependent claims refining the magnetic sensing using magnetometers, including parallel or series operation and threshold triggering, and optionally adding displacement detection in a predetermined direction.
Stated Advantages
Documented Applications
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