Infant monitoring system

• US 20090240160A1
• Filed: 03/19/2008
• Published: 09/24/2009
• Est. Priority Date: 03/19/2008
• Status: Abandoned Application

• Current Assignee: Delphi Technologies, Inc. (BorgWarner Incorporated)
• Original Assignee: Delphi Technologies, Inc. (BorgWarner Incorporated)
• Inventors: Thompson, Loren M., Kotnik, Paul T.
• Application Number:
  US12/077,465
• Publication Number:
  US 20090240160A1
• Time in Patent Office: Days
• US Class Current: 600/527
• CPC Class Codes: A61B 2503/04 Babies, e.g. for SIDS detection
• CPC Class Codes: A61B 2562/247 Hygienic covers, i.e. for covering the sensor or apparatus during use
• CPC Class Codes: A61B 5/1102 Ballistocardiography
• CPC Class Codes: A61B 5/113 occurring during breathing
• CPC Class Codes: A61B 5/70 Means for positioning the patient in relation to the detecting, measuring or recording means

Abstract

An infant monitoring system according to embodiment(s) of the present disclosure includes a positioning member having a top surface, side surface, and tension strip, and an accelerometer in operative communication with the positioning member. The top surface, which may operatively contact an infant, receives and transmits infant cardiac impulses exerted on the top surface. The side surface, operatively connected to the accelerometer, has an initial angular orientation with respect to the top surface. The side surface receives the transmitted cardiac impulses and resolves a heart rate therefrom. The strip, having a substantially low bending stiffness and substantially high tension stiffness, is operatively connected to the top surface and bends longitudinally in response to infant inhalation forces exerted on the top surface. The bending causes angular deflections of the side surface with respect to the initial angular orientation. The accelerometer detects the angular deflections and resolves therefrom a respiration rate.

Claims

1. An infant monitoring system, comprising:

an accelerometer; and

an infant positioning member in operative communication with the accelerometer, the positioning member including;

a positioning member top surface configured for operative contact with an infant having a respiration rate and a heart beat occurring at a heart rate, the top surface configured to receive and transmit, at least in the x-axis, a plurality of cardiac impulses exerted on the top surface responsive to the heart beat;

a positioning member side surface having an initial angular orientation with respect to the top surface, the side surface having the accelerometer operatively connected thereto and configured to;

receive from the side surface the impulses transmitted along the x-axis; and

resolve therefrom the heart rate; and

a tension strip operatively connected to the positioning member top surface, the tension strip having a substantially low bending stiffness and a substantially high tension stiffness, the strip configured to bend longitudinally, in response to periodic inhalation forces exerted on the top surface in response to inhalations by the infant, the periodic longitudinal bending configured to cause respective angular deflections of the positioning member side surface with respect to the initial angular orientation, the accelerometer further being configured to;

detect the respective angular deflections; and

resolve therefrom the respiration rate.

2. The infant monitoring system of claim 1 wherein the accelerometer is not more than a single accelerometer configured to both receive the plurality of the cardiac impulses and detect the respective angular deflections.

3. The infant monitoring system of claim 2 wherein the accelerometer is substantially insensitive to movement in the z-axis having a frequency ranging from about 0.2 hertz (Hz) to about 0.8 hertz (Hz).

4. The infant monitoring system of claim 1 wherein the tension strip is a material which provides a predetermined lateral stiffness and a predetermined bending stiffness.

5. The infant monitoring system of claim 1, further comprising a positioning member cover configured to at least partially protect the infant positioning member, the positioning member cover being removable, semi-removable, or non-removable.

6. The infant monitoring system of claim 1, further comprising an alert system in operative communication with the accelerometer and configured to emit an alarm if at least one of the respiration rate or the heart rate extends beyond a respective predetermined range.

7. The infant monitoring system of claim 6 wherein the alert system is configured to emit the alarm if the respiration rate extends beyond the respective predetermined range, and wherein the respective predetermined range extends from about 12 breaths per minute to about 60 breaths per minute.

8. The infant monitoring system of claim 6 wherein the alert system is configured to emit the alarm if the heart rate extends beyond the respective predetermined range, and wherein the respective predetermined range extends from about 60 (beats per minute) to about 150 (beats per minute).

9. The infant monitoring system of claim 6 wherein the alarm includes at least one of an audible alarm, a visual alarm, or a tactile alarm.

10. The infant monitoring system of claim 1 wherein the infant positioning member is at least partially formed from at least one of an open/closed cell foam or an elastomeric material.

11. A method of monitoring an infant having a respiration rate and a heart beat occurring at a heart rate, the method comprising:

situating the infant in operative communication with a top surface of an infant positioning member, the positioning member also having a positioning member side surface having an initial angular orientation with respect to the top surface, the top surface operatively connected to a tension strip having a substantially low bending stiffness and a substantially high tension stiffness;

receiving, at the positioning member top surface, a plurality of cardiac impulses exerted in response to the heart beat;

transmitting, at least in the x-axis, the plurality of cardiac impulses;

realizing, at an accelerometer operatively connected to the positioning member side surface, the impulses transmitted along the x-axis;

resolving the heart rate in response to the realized impulses;

detecting, at the accelerometer, a plurality of respective angular deflections of the positioning member side surface with respect to the initial angular orientation, the respective angular deflections responsive to periodic longitudinal bending of the tension strip caused by periodic inhalation forces exerted on the top surface in response to inhalations by the infant; and

resolving the respiration rate in response to the detected respective angular deflections.

12. The method of claim 11 wherein realizing the transmitted impulses and detecting the responsive angular deflections is performed by not more than one accelerometer.

13. The method of claim 11, further comprising emitting an alarm from an alert system if at least one of the respiration rate or the heart rate extends beyond a respective predetermined range.

14. The method of claim 13 wherein the alert system emits the alarm if the respiration rate extends beyond the respective predetermined range, and wherein the respective predetermined range extends from about 12 breaths per minute to about 60 breaths per minute.

15. The method of claim 13 wherein the alert system emits the alarm if the heart rate extends beyond the respective predetermined range, and wherein the respective predetermined range extends from about 60 (beats per minute) to about 150 (beats per minute).

16. The method of claim 13 wherein the alarm includes at least one of an audible alarm, a visual alarm, or a tactile alarm.