Medical treatment device with speaker sound detection

Patent metadata

Field	Value
Publication number	US-10002190-B2
Application number	US-201615554065-A
Country	US
Kind code	B2
Filing date	Apr 1, 2016
Priority date	Apr 6, 2015
Publication date	Jun 19, 2018
Grant date	Jun 19, 2018

Abstract

Medical treatment devices and methods may include a speaker operable to broadcast one or more types of sounds, wherein each type of sound may be associated with a predefined sound signature. An acoustic transducer may be used to generate a sound signal representative of a sound when broadcast by the speaker. The speaker may be commanded to broadcast a sound of the one or more types of sounds, a sound signal generated by the acoustic transducer during a time period when the speaker is expected to broadcast the sound may be monitored, and it may be determined if the speaker was operable to broadcast the sound and whether the sound was audible to a user by comparing the stored sound signal to the sound signature associated with the type of sound commanded to be broadcast.

First claim

What is claimed is:

1. A medical treatment device for use in providing a treatment to a patient, the medical treatment device comprising:
a speaker operable to broadcast one or more types of sounds, wherein the one or more types of sounds comprise at least one of an alarm sound and a test sound, wherein the alarm sound comprises a plurality of spaced apart notes with each note having a duration, an amplitude, and a frequency, wherein each test sound comprises a note having a duration, an amplitude, and a frequency, wherein each type of sound is associated with a predefined sound signature, wherein the sound signature corresponding to an alarm sound comprises criteria based at least on the amplitude and duration of at least two notes of the plurality of spaced apart notes, and further wherein the sound signature corresponding to a test sound comprises criteria based on the amplitude and duration of the note thereof;
an acoustic transducer to generate a sound signal representative of a sound when broadcast by the speaker; and
processing circuitry configured to:
command the speaker to broadcast a sound of the one or more types of sounds;
monitor and store the sound signal generated by the acoustic transducer during a time period when the speaker is expected to broadcast the sound; and
determine if the speaker was operable to broadcast the sound and whether the sound was audible to a user by comparing the stored sound signal to the sound signature associated with the type of sound commanded to be broadcast.

2. The device of claim 1 , wherein the criteria of a sound signature corresponding to an alarm sound or a test sound are independent of frequency.

3. The device of claim 1 ,
wherein the one or more types of sounds comprise a plurality of types of alarm sounds, wherein each type of alarm sound comprises a different plurality of spaced apart notes with each note having a duration, an amplitude, and a frequency, wherein the plurality of types of alarm sounds are associated with a common predefined sound signature, wherein the common predefined sound signature is based at least on the amplitude and duration of at least two notes of the plurality of spaced apart notes of each of the plurality of types of alarm sounds,
wherein the processing circuitry is further configured to command the speaker to broadcast an alarm sound of the plurality of types of alarm sounds, and determine if the speaker was operable to broadcast the alarm sound and whether the alarm sound was audible to a user by comparing the stored sound signal to the common predefined sound signature associated with the plurality of types of alarm sounds.

4. The device of claim 1 ,
wherein the one or more types of sounds comprise a plurality of types of alarm sounds, wherein each type of alarm sound comprises a different plurality of spaced apart notes with each note having a duration, an amplitude, and a frequency, wherein each of the plurality of types of alarm sounds are associated with a predefined sound signature, wherein the predefined sound signature is based at least on the amplitude and duration of at least two notes of the plurality of spaced apart notes of each of the plurality of types of alarm sounds and the spacing between the plurality of spaced apart notes,
wherein the processing circuitry is further configured to command the speaker to broadcast an alarm sound of the plurality of types of alarm sounds, and determine if the speaker was operable to broadcast the alarm sound and whether the alarm sound was audible to a user by comparing the stored sound signal to the predefined sound signatures associated with the types of alarm sounds.

5. The device of claim 1 , wherein the sound is a test sound, and wherein the processing circuitry is further configured to:
filter the sound signal generated by the acoustic transducer to provide a filtered sound signal; and
compare the amplitude of the filtered sound signal to an amplitude threshold of the sound signature, wherein a test sound is detected if the amplitude of the filtered sound is greater than the amplitude threshold for a time exceeding a duration time threshold of the sound signature.

6. The device of claim 1 , wherein the sound is an alarm sound, and wherein the processing circuitry is further configured to:
filter the sound signal generated by the acoustic transducer to provide a filtered sound signal;
compare the amplitude of the filtered sound signal to an amplitude threshold of the sound signature, wherein a note of the plurality of notes defining the alarm sound is detected if the amplitude of the filtered sound is greater than the amplitude threshold for a time exceeding a note duration time threshold of the sound signature; and
determine the existence of a predetermined number of detected notes based on the sound signature, wherein an alarm sound is detected if the number of detected notes exceeds a predetermined number within an alarm duration time threshold of the sound signature.

7. The device of claim 6 , wherein the processing circuitry is further configured to filter the sound signal generated by the acoustic transducer by applying an amplitude/difference filter to the sound signal and then smoothing the signal to provide the filtered sound signal.

8. The device of 7 , wherein applying an amplitude/difference filter to the sound signal comprises taking a derivative of the sound signal.

9. The device of claim 1 , wherein the processing circuitry is further configured to command the speaker to broadcast at least two different alarm sounds having different patterns of spaced apart notes, and further wherein it is determined whether the speaker was operable to broadcast each of the at least two different alarm sounds.

10. The device of claim 9 , wherein the each alarm sound of the at least two different alarm sounds having different patterns of spaced apart notes comprises one or more notes having at least one of a different amplitude, a different duration, and a different frequency than at least one other note of a different alarm sound.

11. The device of claim 1 , wherein the processing circuitry is further configured to:
command the speaker to broadcast a sound using a driver associated with control circuitry of the medical treatment device that controls treatment of a patient, and further wherein it is determined whether the speaker was operable to broadcast the sound; and
command the speaker to broadcast a sound based using a driver associated with circuitry different than the control circuitry of the medical treatment device, and further wherein it is determined whether the speaker was operable to broadcast the sound.

12. The device of claim 1 , wherein the processing circuitry is further configured to:
command a primary speaker to broadcast a sound, and further wherein it is determined whether the primary speaker was operable to broadcast the sound; and
command a backup speaker to broadcast a sound, and further wherein it is determined whether the backup speaker was operable to broadcast the sound.

13. The device of claim 1 , wherein the device comprises an extracorporeal blood treatment apparatus.

14. The device of claim 1 , wherein the processing circuitry is further configured to alarm or allow the medical treatment device to be placed in a mode to provide treatment based on whether the speaker was operable to broadcast the sound and whether the sound was audible to a user.

15. A method for a medical treatment device, wherein the medical treatment device comprises a speaker operable to broadcast one or more types of sounds, wherein the one or more types of sounds c

Assignees

• Gambro Lundia Ab

Inventors

• West William Joseph

Classifications

• A61M2205/18

  with alarm · CPC title

• G16H40/40

  for the management of medical equipment or devices, e.g. scheduling maintenance or upgrades · CPC title

• G16H40/63

  for local operation · CPC title

• G06F16/683 Primary

  using metadata automatically derived from the content · CPC title

• G06F3/162

  Interface to dedicated audio devices, e.g. audio drivers, interface to CODECs · CPC title