US-20260124354-A1 - SYSTEMS AND METHODS FOR NEGATIVE PRESSURE WOUND THERAPY SYSTEM WITH NOISE CANCELLING

Abstract

A negative pressure wound therapy (NPWT) device includes a pneumatic pump, a single microphone, and a controller. The pneumatic pump is operable to draw a negative pressure at a wound dressing. The single microphone is configured to measure a sound level of an environment surrounding the NPWT device. The controller is configured to operate the pneumatic pump to draw the negative pressure at the wound dressing. The controller is further configured to obtain the sound level of the environment surrounding the NPWT device, and adjust operation of the pneumatic pump based on the sound level of the environment.

Inventors

• Benjamin A. Pratt
• James Seddon
• Timothy M. Robinson

Assignees

• KCI MANUFACTURING UNLIMITED COMPANY

Dates

Publication Date

20260507

Application Date

20220926

Claims (20)

1. 1 . A negative pressure wound therapy (NPWT) device comprising: a pneumatic pump operable to draw a negative pressure at a wound dressing; a single microphone configured to measure a sound level of an environment surrounding the NPWT device; and a controller configured to: operate the pneumatic pump to draw the negative pressure at the wound dressing; obtain the sound level of the environment surrounding the NPWT device; adjust operation of the pneumatic pump based on the sound level of the environment.
2. 2 . The NPWT device of claim 1 , wherein the controller is configured to: adjust a duty cycle of the pneumatic pump to reduce sound emitted by the pneumatic pump in response to the sound level of the environment exceeding a threshold.
3. 3 . (canceled)
4. 4 . The NPWT device of claim 1 , further comprising a pressure sensor, wherein the controller is configured to determine if the negative pressure is maintained at the wound dressing based on information received from the pressure sensor.
5. 5 . The NPWT device of claim 4 , wherein the controller is configured to, in response to the negative pressure not being maintained at the wound dressing: determine if the negative pressure is at a lowest acceptable value; in response to the negative pressure not being at the lowest acceptable value: reduce a magnitude of the negative pressure by adjusting operation of the pump; and obtain the sound level of the environment surrounding the NPWT device; in response to the negative pressure being above the lowest acceptable value: operate a display of the NPWT device to provide a leak alarm; and operate the pneumatic pump to maintain the negative pressure at the lowest acceptable value.
6. 6 . The NPWT device of claim 4 , wherein the controller is configured to, in response to the negative pressure being maintained at the wound dressing: obtain the sound level of the environment surrounding the NPWT device; and adjust operation of the pneumatic pump based on the sound level of the environment to maintain the sound level of the environment below a threshold.
7. 7 . (canceled)
8. 8 . The NPWT device of claim 1 , wherein the controller is configured to: operate the pneumatic pump to provide the negative pressure at a reduced magnitude in response to the sound level of the environment exceeding a threshold and a pump duty cycle of the pneumatic pump being at a lowest acceptable value.
9. 9 . A negative pressure wound therapy (NPWT) device comprising: a pneumatic pump operable to draw a negative pressure at a wound dressing; a single microphone configured to measure a sound level of an environment surrounding the NPWT device; a single speaker configured to emit a sound for noise cancellation; and a controller configured to: obtain the sound level of the environment surrounding the NPWT device as the pneumatic pump operates to draw the negative pressure; adjust a duty cycle of the pneumatic pump in response to the sound level of the environment exceeding a threshold; obtain the sound level of the environment surrounding the NPWT device as the pneumatic pump operates according to the adjusted duty cycle; in response to the sound level of the environment surrounding the NPWT device exceeding the threshold as the pneumatic pump operates according to the adjusted duty cycle: operate the single speaker to provide a sound wave having a frequency to provide destructive interference to sound waves emitted into the environment by the pneumatic pump to reduce the sound level of the environment.
10. 10 . The NPWT device of claim 9 , wherein the controller is configured to: select a profile for the speaker from a plurality of predetermined profiles based on at least one of the adjusted duty cycle of the pneumatic pump or the sound level of the environment; operate the speaker according to the profile to emit the sound wave for noise cancellation.
11. 11 . The NPWT device of claim 9 , wherein the single microphone is configured to measure both a sound level of the environment, and a characteristic of sound waves in the environment, wherein the controller is configured to determine the frequency for the sound wave provided by the single speaker based on the characteristic of the sound wave in the environment, and wherein the characteristic comprises at least one of an amplitude or a frequency of sound waves in the environment of the NPWT device.
12. 12 . (canceled)
13. 13 . (canceled)
14. 14 . (canceled)
15. 15 . (canceled)
16. 16 . The NPWT device of claim 9 , wherein the controller is configured to adjust operation of the pneumatic pump to provide the negative pressure having a reduced magnitude in response to the sound level of the environment exceeding the threshold amount as the single speaker is operated to provide the sound wave.
17. 17 . A negative pressure wound therapy (NPWT) device comprising: a pneumatic pump operable to draw a negative pressure at a wound dressing; at least one microphone configured to measure a sound level of an environment surrounding the NPWT device; a plurality of speakers configured to emit sound for noise cancellation in a plurality of directions; and a controller configured to: obtain the sound level of the environment surrounding the NPWT device as the pneumatic pump operates to draw the negative pressure; adjust a duty cycle of the pneumatic pump in response to the sound level of the environment exceeding a threshold; obtain the sound level of the environment surrounding the NPWT device as the pneumatic pump operates according to the adjusted duty cycle; in response to the sound level of the environment surrounding the NPWT device exceeding the threshold as the pneumatic pump operates according to the adjusted duty cycle: operate the plurality of speakers to provide sound waves in the plurality of directions, the sound waves having frequencies to provide destructive interference to sound waves emitted into the environment by the pneumatic pump to reduce the sound level of the environment.
18. 18 . The NPWT device of claim 17 , wherein the controller is configured to: select a profile for each of the plurality of speakers from a plurality of predetermined profiles based on at least one of the adjusted duty cycle of the pneumatic pump or the sound level of the environment; operate the plurality of speakers according to each of the profiles to emit the sound waves for noise cancellation.
19. 19 . The NPWT device of claim 17 , wherein the single microphone is configured to measure both a sound level of the environment, and a characteristic of sound waves in the environment, wherein the controller is configured to determine the frequency for the sound wave provided by the single speaker based on the characteristic of the sound wave in the environment, and wherein the characteristic comprises at least one of an amplitude or a frequency of sound waves in the environment of the NPWT device.
20. 20 . (canceled)

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a U.S. National Stage Entry of PCT/IB2022/059119, filed Sep. 26, 2022, which claims the benefit, under 35 U.S.C. § 119 (c), of U.S. Provisional Application No. 63/275,033, filed on Nov. 3, 2021, each of which are incorporated herein by reference in its entirety. BACKGROUND The present disclosure relates generally to a wound therapy system, and more particularly to a negative pressure wound therapy system. SUMMARY One implementation of the present disclosure is a negative pressure wound therapy (NPWT) device, according to some embodiments. In some embodiments, the NPWT device includes a pneumatic pump, a single microphone, and a controller. In some embodiments, the pneumatic pump is operable to draw a negative pressure at a wound dressing. In some embodiments, the single microphone is configured to measure a sound level of an environment surrounding the NPWT device. In some embodiments, the controller is configured to operate the pneumatic pump to draw the negative pressure at the wound dressing. In some embodiments, the controller is further configured to obtain the sound level of the environment surrounding the NPWT device, and adjust operation of the pneumatic pump based on the sound level of the environment. In some embodiments, the controller is configured to adjust operation of the pneumatic pump to reduce sound emitted by the pneumatic pump in response to the sound level of the environment exceeding a threshold. In some embodiments, adjusting operation of the pneumatic pump includes adjusting a duty cycle of the pneumatic pump. In some embodiments, the NPWT device further includes a pressure sensor. In some embodiments, the controller is configured to determine if the negative pressure is maintained at the wound dressing based on information received from the pressure sensor. In some embodiments, the controller is configured to, in response to the negative pressure not being maintained at the wound dressing: determine if the negative pressure is at a lowest acceptable value, and in response to the negative pressure not being at the lowest acceptable value, reduce a magnitude of the negative pressure by adjusting operation of the pump, and obtain the sound level of the environment surrounding the NPWT device. In some embodiments, in response to the negative pressure not being maintained and the negative pressure being above the lowest acceptable value, the controller is configured to operate a display of the NPWT device to provide a leak alarm, and operate the pneumatic pump to maintain the negative pressure at the lowest acceptable value. In some embodiments, the controller is configured to, in response to the negative pressure being maintained at the wound dressing, obtain the sound level of the environment surrounding the NPWT device, and adjust operation of the pneumatic pump based on the sound level of the environment to maintain the sound level of the environment below a threshold. In some embodiments, the pneumatic pump is positioned within a cavity of the NPWT device. In some embodiments, the cavity includes sound absorbing material and an opening. In some embodiments, the sound absorbing material is configured to absorb sound emitted by the pneumatic pump as the pneumatic pump operates, and the pneumatic pump is configured to emit sound through the opening to the environment. In some embodiments, the controller is configured to operate the pneumatic pump to provide the negative pressure at a reduced magnitude in response to the sound level of the environment exceeding a threshold and a pump duty cycle of the pneumatic pump being at a lowest acceptable value. Another implementation of the present disclosure is a NPWT device, according to some embodiments. In some embodiments, the NPWT device includes a pneumatic pump, a single microphone, a single speaker, and a controller. In some embodiments, the pneumatic pump is operable to draw a negative pressure at a wound dressing. In some embodiments, the single microphone is configured to measure a sound level of an environment surrounding the NPWT device. In some embodiments, the single speaker is configured to emit a sound for noise cancellation. In some embodiments, the controller is configured to obtain the sound level of the environment surrounding the NPWT device as the pneumatic pump operates to draw the negative pressure. In some embodiments, the controller is also configured to adjust a duty cycle of the pneumatic pump in response to the sound level of the environment exceeding a threshold and obtain the sound level of the environment surrounding the NPWT device as the pneumatic pump operates according to the adjusted duty cycle. In some embodiments, in response to the sound level of the environment surrounding the NPWT device exceeding the threshold as the pneumatic pump operates according to the adjusted duty cycle, the controller is configured to operate the single speaker to prov