SIDS detection apparatus and methods

• US 5,241,300 A
• Filed: 04/24/1992
• Issued: 08/31/1993
• Est. Priority Date: 04/24/1992
• Status: Expired due to Fees

• Current Assignee: Johannes Buschmann
• Original Assignee: Johannes Buschmann
• Inventors: Buschmann, Johannes
• Primary Examiner(s): Swann, III, Glen R.
• Application Number:
  US07/874,297
• Time in Patent Office: 494 Days
• Field of Search: 340/573, 340/600, 340/531, 128/721
• US Class Current: 340/573.1
• CPC Class Codes: A61B 2503/06 Children, e.g. for attention deficit diagnosis
• CPC Class Codes: A61B 2560/0475 Special features of memory means, e.g. removable memory cards
• CPC Class Codes: A61B 5/1135 by monitoring thoracic expansion
• CPC Class Codes: G01L 1/243 using means for applying force perpendicular to the fibre axis
• CPC Class Codes: G01L 1/245 using microbending

Abstract

A transilluminated optical fiber is placed adjacent to an infant'"'"'s respiratory moving parts using an elastic fabric. Use is made of the effect that moving the fiber causes a modulation of the intensity of the transmitted light to monitor the infant'"'"'s breathing pattern to avoid S(udden) I(nfant) D(eath) S(yndrome).

Claims

1. A method of monitoring the respiration of an infant comprising the steps of:

placing optical fiber means adjacent to the respiratory parts of the infant to be monitored;

transmitting light from a light source through the fiber means onto a photoelectric converter;

monitoring changes in the intensity of the transmitted light as a function of the movement of the fiber means in response to the movement of respiratory parts of the infant;

comparing changes in the intensity of transmitted light through movement of the fiber means corresponding to the infant'"'"'s respiratory effects, with a predetermined threshold, indicating whether or not the infant is breathing;

comparing the time elapsed since the last respiratory effect with a given maximum tolerable respiratory arrest time; and

giving an alarm if the elapsed time exceeds the predetermined tolerable respiratory arrest time.

2. The method as set forth in claim 1 wherein the placing is effected by coupling at least a portion of the fiber means to a garment of the infant so as to be located on the chest/belly region of the infant and including the further step of clothing the infant with the garment.

3. A method for monitoring the movement caused by the normal respiration of an infant and for triggering an alarm in response to the prolonged stoppage of such movement comprising the steps of:

placing an optical fiber means in a sinusoidal manner adjacent to the body of the infant to be monitored;

establishing a tight contact of a garment containing the optical fiber by making use of an elastic fabric;

transilluminating the fiber means with a light having a wavelength of between about 0.1 and 5 μ

m;

monitoring the change of transmission of the fiber means with an evaluating electronic unit as a function of the movement of the fiber means as caused by the movement of the infant'"'"'s respiratory part; and

triggering an alarm upon the prolonged stoppage of the movement of the infant and the fiber means.

4. The method as set forth in claim 3 wherein the alarm is triggered adjacent to the evaluating electronic unit.

5. The method as set forth in claim 3 wherein the alarm is triggered remote from the evaluating electronic unit.

6. The method as set forth in claim 3 and further including the steps of providing a separate remote alarm unit which triggers an alarm when an alarm signal is transmitted from the evaluating unit to the remote unit.

7. The method as set forth in claim 6 and further including the step of transceiving a verification signal between the evaluating unit and the remote alarm.

8. Apparatus for monitoring the respiration of an infant comprising, in combination:

optical fiber means located adjacent to the body of the infant to be monitored;

means to transilluminate the fiber means; and

means to monitor the transillumination as a function of the movement of the infant and of the fiber means.

9. The apparatus as set forth in claim 8 and further including a garment with the fiber means woven into the garment so as to be located on the chest/belly region of the infant.

10. The apparatus as set forth in claim 8 and further including an alarm and means to trigger the alarm as a function of the monitored transillumination.

11. The apparatus as set forth in claim 10 and further including a transmitter and a separate remote portable alarm unit.

12. The apparatus as set forth in claim 11 wherein the signal is infrared.

13. The apparatus as set forth in claim 11 wherein the signal is ultrasound.

14. The apparatus as set forth in claim 11 wherein the signal is radiowave.

15. The apparatus as set forth in claim 11 and further including means associated with the evaluating unit and the remote alarm for transmitting therebetween a verification signal.

16. The apparatus as set forth in claim 10 wherein the alarm is optical.

17. The apparatus as set forth in claim 10 wherein the alarm is acoustical.

18. The apparatus as set forth in claim 8 wherein the fiber means is an optical monofilament.

19. The apparatus as set forth in claim 8 wherein the fiber means is a bundle of fiber optic filaments.