PORTABLE MEDICAL DEVICE

• US 20170188946A1
• Filed: 12/23/2016
• Published: 07/06/2017
• Est. Priority Date: 12/30/2015
• Status: Abandoned Application

• Current Assignee: Paul Hartmann AG (SCHWENK Zement GmbH & Co. KG)
• Original Assignee: Paul Hartmann AG (SCHWENK Zement GmbH & Co. KG)
• Inventors: Klusmann, Johanna, Beyrle, Karina, Hofstetter, Jrgen, Eckstein, Axel, Croizat, Pierre
• Application Number:
  US15/389,874
• Publication Number:
  US 20170188946A1
• Time in Patent Office: Days
• CPC Class Codes: A61B 2560/0276 Determining malfunction
• CPC Class Codes: A61B 2562/0219 Inertial sensors, e.g. accelerometers, gyroscopes, tilt switches
• CPC Class Codes: A61B 5/02141 Details of apparatus construction, e.g. pump units or housings therefor, cuff pressurising systems, arrangements of fluid conduits or circuits A61B5/02233, A61B5/0235 take precedence
• CPC Class Codes: A61B 5/02438 with portable devices, e.g. worn by the patient
• CPC Class Codes: A61B 5/1123 Discriminating type of movement, e.g. walking or running A61B5/1116, A61B5/112 take precedence
• CPC Class Codes: A61B 5/332 Portable devices specially adapted therefor
• CPC Class Codes: A61B 5/369 Electroencephalography [EEG] devices for psychotechnics A61B5/16
• CPC Class Codes: A61B 5/68 Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
• CPC Class Codes: A61B 5/74 Details of notification to user or communication with user or patient indicating measured values G01D7/00; user input means input or output arrangements for computers G06F3/00
• CPC Class Codes: A61M 1/73 comprising sensors or indicators for physical values
• CPC Class Codes: A61M 1/962 having pumping means on the suction site, e.g. miniature pump on dressing or dressing capable of exerting suction
• CPC Class Codes: A61M 1/984 portable on the body
• CPC Class Codes: A61M 2005/2418 comprising means for damping shocks on ampoule
• CPC Class Codes: A61M 2209/088 on the body
• CPC Class Codes: A61M 5/14244 adapted to be carried by the patient, e.g. portable on the body
• CPC Class Codes: A61N 1/0484 Garment electrodes worn by the patient
• CPC Class Codes: A61N 1/36542 controlled by body motion, e.g. acceleration
• CPC Class Codes: G01P 1/023 for acceleration measuring devices
• CPC Class Codes: G01P 15/02 by making use of inertia forces using solid seismic massesG01P15/14 takes precedence
• CPC Class Codes: G01P 15/18 in two or more dimensions

Abstract

A portable medical device adapted to be carried by a user, comprising at least one electrically actuated means for performing a therapeutic and/or a diagnostic function on a patient, at least one mobile electric power supply, a control unit having at least one microelectronic controller, at least one electronic memory and at least one multi-channel impact sensor unit. The impact sensor unit is adapted to simultaneously detect linear acceleration along the three space axes and angular rates around the three space axes. The impact sensor unit generates impact sensor data sets, which are electronically transferred to the microelectronic controller via an interface. The device further comprises a housing, in which the electric components of the device are contained. The device is adapted to execute a classification algorithm, which allows to discriminate a first impact sensor data set, said first impact data set being correlated to a first impact event which is detrimental for the device, from a second impact sensor data set, said second impact data set being correlated to a second impact event which is not detrimental for the device.

Claims

1. A portable medical device adapted to be carried by a user, comprising

at least one electrically actuated means for performing a therapeutic and/or a diagnostic function on a patient,

at least one mobile electric power supply,

a control unit having at least one microelectronic controller and at least one electronic memory,

at least one multi-channel impact sensor unit, wherein the impact sensor unit is adapted to simultaneously detect linear acceleration (a_x;

a_y;

a_z) along the three space axes (x;

y;

z) and angular rates (ω

_x;

ω

_y;

ω

_z) around the three space axes (x;

y;

z), wherein

the impact sensor unit generates impact sensor data sets, and the impact sensor data sets are electronically transferred to the microelectronic controller via an interface,

a housing, in which the electric components of the device are contained, wherein

the microelectronic controller is adapted to execute a classification algorithm which allows to discriminate

a first impact sensor data set, said first impact data set being correlated to a first impact event which is detrimental for the device, from

a second impact sensor data set, said second impact data set being correlated to a second impact event which is not detrimental for the device.

2. Portable medical device according to claim 1, wherein the classification algorithm includes a support vector machine.

3. Portable medical device according to claim 2, wherein the classification algorithm includes a support vector machine using a two-dimensional space and a one-dimensional separation line (hyperplane).

4. Portable medical device according to claim 3, wherein the first dimension of the two dimensional space is defined by the magnitude M_a corresponding to the vector length of the linear acceleration values (a_x;

a_y;

a_z) measured by the acceleration sensor and wherein the second dimension of the two dimensional space is defined by the magnitude M_ω

corresponding to the vector length of the angular rate values (ω

_x;

ω

_y;

ω

_z) measured by the rotation sensor.

5. Portable medical device according to claim 1, wherein the impact sensor unit comprises a microelectronic inertial measurement unit (IMU) for detection of linear acceleration and rotation and wherein the microelectronic inertial measurement unit (IMU) is integrated in a single chip.

6. Portable medical device according to claim 1, wherein the at least one electronic memory is adapted to store operating instructions for the microelectronic controller and/or to record status information related to the function of the device.

7. Portable medical device according to claim 6, wherein the at least one electronic memory is further adapted to store sensor data sets generated by the at least one impact sensor unit and/or to store a result obtained by the classification algorithm.

8. Portable medical device according to claim 1, herein the at least one electronic memory comprises a separate electronic impact sensor data memory, in particular a flash memory, and the separate electronic impact sensor data memory is adapted to store impact sensor data sets generated by the at least one impact sensor unit and/or a result obtained by the classification algorithm.

9. Portable medical device according to claim 1, wherein the device further comprises a separate mobile electric power supply, in particular a battery, a rechargeable accumulator or a capacitor, and the separate electric power supply is adapted to supply electric energy to the impact sensor unit.

10. Portable medical device according to claim 1, wherein the impact sensor unit is adapted to activate an inactive microelectronic controller, if the impact sensor unit detects at least one linear acceleration value (a_x;

a_y;

a_z) or at least one angular rate value (ω

_x;

ω

_y;

ω

_z) above a predetermined threshold level.

11. Portable medical device according to claim 1, further comprising a real time clock, whereby the device is adapted to record the time of an impact, if the impact sensor unit detects at least one linear acceleration value (a_x;

a_y;

a_z) or at least one angular rate value (ω

_x;

ω

_y;

ω

_z) above a predetermined threshold level.

12. Portable medical device according to claim 1, further comprising a real time clock, whereby the device is adapted to record the time at which the classification algorithm has produced a discrimination result.

13. Portable medical device according to claim 1, wherein the microelectronic controller comprises a user interface adapted to receive user settings and/or to display one or more system conditions.

14. Portable medical device according to claim 1, wherein the device is selected from the group of an ambulatory wound therapy device, in particular a negative pressure wound therapy device, an ambulatory deep brain stimulation device, an ambulatory cardiac stimulator, an ambulatory infusion device, in particular an insulin pump, an ambulatory blood pressure unit, an ambulatory pulse monitor, an ambulatory electrocardiogram device, an ambulatory electroencephalogram device and an ambulatory diagnosis system for determining metabolites circulating in the blood.

15. Method of discriminating a first and a second impact event, comprising the steps

providing a portable medical device according to claim 1,

detecting the first or a second impact event by the impact sensor unit,

executing a classification algorithm, which allows to discriminate a first impact sensor data set, said first impact data set being correlated to a first impact event which is detrimental for the device from a second impact sensor data set, said second impact data set being correlated to a second impact event which is not detrimental for the device

recording the result obtained from the classification algorithm, and

optionally displaying an alarm message to the user, if the result obtained from executing the classification algorithm indicates, that a first impact event, which is detrimental for the device, has occurred.