Closed loop electric breast pump
Examples disclosed herein are relevant to breast pumps. Disclosed examples include breast pumps that automatically adjust various pumping parameters based on data obtained from one or more sensors. The one or more sensors can produce data regarding an amount of milk expressed by a user. The adjusting of the pumping parameters can be configured to, for example, help the user efficiently express milk by utilizing a closed-feedback system that monitors the flow rate of the expressed milk.
1. A breast pump system, comprising:
a milk collection apparatus comprising a pump volume;
a pump console comprising one or more processors and a pump, wherein the pump is configured to induce suction at the milk collection apparatus based on one or more pumping parameters; and
a pressure sensor configured to measure negative pressure within the pump volume,
wherein the one or more processors are configured to:
control the pump through one or more milk expression cycles, wherein each of the one or more milk expression cycles includes at least one period;
detect, using the pressure sensor, a change from a first negative pressure measured during the at least one period of a first milk expression cycle of the one or more milk expression cycles to a second negative pressure measured during the at least one period of a second milk expression cycle of the one or more milk expression cycles;
determine an estimated volume of milk within the milk collection apparatus, based on the detected change in negative pressure; and
modify at least one of the one or more pumping parameters, based at least in part on the detected change in negative pressure and the estimated volume of milk.
2. The breast pump system of claim 1 , wherein the milk collection apparatus further comprises a breast shield, and wherein the pressure sensor is directly attached to the breast shield.
3. The breast pump system of claim 1 , wherein the pump console further comprises a current sensor, wherein the current sensor is configured to measure current draw of the pump, and wherein the one or more processors are configured to determine the estimated volume of milk within the milk collection apparatus, further based on the current draw.
4. The breast pump system of claim 1 , wherein the one or more pumping parameters are selected from the group consisting of a ramp time, a hold time, a duty cycle, a release time, and a pumping waveform.
5. The breast pump system of claim 1 , wherein the one or more processors are further configured to:
determine a milk ejection pattern for a user of the breast pump system based on a volume of milk expressed; and
modify at least one of the one or more pumping parameters based on the determined milk ejection pattern.
6. The breast pump system of claim 5 , wherein modifying the at least one of the one or more pumping parameters based on the determined milk ejection pattern comprises modifying a stimulation parameter.
7. The breast pump system of claim 5 , wherein determining the milk ejection pattern comprises determining a flow rate of the volume of milk expressed over time.
8. The breast pump system of claim 1 , wherein the at least one period for each of the one or more milk expression cycles comprises a ramp period, a hold period, and a release period.
9. The breast pump system of claim 1 , wherein the at least one period comprises a hold period.
10. A breast pump system comprising:
a milk collection apparatus;
a pump;
a current sensor configured to measure a current draw of the pump;
a voltage sensor configured to measure a voltage draw of the pump; and
one or more processors configured to:
control the pump to induce suction at the milk collection apparatus based on one or more pumping parameters;
determine an estimated volume of milk accumulated within the milk collection apparatus based on the current draw and the voltage draw; and
modify at least one of the one or more pumping parameters based on the estimated volume of milk.
11. The breast pump system of claim 10 , wherein the one or more processors are further configured to determine a reduction in an amount of effort expended by the pump, and wherein determining the estimated volume of milk accumulated within the milk collection apparatus is determined based on the reduction in the amount of effort, thereby being based on the current draw.
12. The breast pump system of claim 10 , further comprising a pump console comprising the pump, the current sensor, and the one or more processors.
13. A breast pump system comprising:
a milk collection apparatus comprising a pump volume;
a pump;
a pressure sensor configured to measure a negative pressure within the pump volume;
a current sensor configured to measure a current draw of the pump;
a voltage sensor configured to measure a voltage draw of the pump; and
one or more processors configured to:
control the pump to induce suction at the milk collection apparatus over a cycle based on one or more pumping parameters;
determine an estimated volume of milk accumulated within the milk collection apparatus based on the current draw, the voltage draw and on a change in the negative pressure measured using the pressure sensor; and
modify at least one of the one or more pumping parameters based on the estimated volume of milk.
14. The breast pump system of claim 13 , further comprising a pump console including the pump, the pressure sensor, and the current sensor.
15. The breast pump system of claim 13 , wherein the change in negative pressure is selected from the group consisting of a change within the cycle and a change between the cycle and another cycle.
16. The breast pump system of claim 13 , wherein the cycle is a milk expression cycle.
17. The breast pump system of claim 13 , wherein modifying at least one of the one or more pumping parameters includes transitioning from stimulation pumping parameters to expression pumping parameters or transitioning from expression pumping parameters to stimulation pumping parameters.
18. A breast pump system, comprising:
a milk collection apparatus comprising a pump volume;
a pump console comprising one or more processors and a pump, wherein the pump is configured to induce suction at the milk collection apparatus based on one or more pumping parameters; and
a pressure sensor configured to measure negative pressure within the pump volume,
wherein the one or more processors are configured to:
control the pump through a milk expression cycle that includes at least one of a hold period or a release period;
detect, using the pressure sensor, a change in negative pressure measured during at least one of the hold period or the release period;
determine an estimated volume of milk within the milk collection apparatus, based on the detected change in negative pressure; and
modify at least one of the one or more pumping parameters, based at least in part on the detected change in negative pressure and the estimated volume of milk.