BREASTSHIELD UNIT
A breastshield unit of a breast pump for expressing human breastmilk comprises a breastshield ( 1 ) for placing onto a human breast, a milk collection container ( 4 ) for receiving expressed breastmilk, a breastshield adapter ( 2 ) for connecting the breastshield ( 1 ) to the milk collection container ( 4 ), and at least one sensor ( 6, 7 ) for detecting the breastmilk. From the breastshield, a milk channel extends through the breastshield adapter into the milk collection container. A siphon is arranged in the milk channel, and the at least one sensor ( 6, 7 ) for detecting the breastmilk is arranged downstream from the siphon in the direction of flow of the breastmilk. The breastshield unit permits optimal measurement of properties of the expressed breastmilk.
1 . A breastshield unit of a breast pump for expressing human breastmilk, wherein the breastshield unit comprises a breastshield for placing onto a human breast, a milk collection container for receiving expressed breastmilk, a breastshield adapter for connecting the breastshield to the milk collection container, and at least one sensor for detecting the breastmilk, wherein a milk channel extends from the breastshield through the breastshield adapter into the milk collection container, wherein the milk channel defines a direction of flow of the breastmilk, wherein a siphon is arranged in the milk channel, wherein the at least one sensor for detecting the breastmilk is arranged downstream from the siphon in the direction of flow of the breastmilk.
2 . The breastshield unit according to claim 1 , wherein a valve is present which closes and opens the milk channel during the expression process, and wherein the siphon in the milk channel is arranged downstream from the valve in the direction of flow of the breastmilk.
3 . The breastshield unit according to claim 2 , wherein the milk channel comprises a widened region between the valve and the siphon.
4 . The breastshield unit according to claim 1 , wherein it comprises a signal evaluation module for evaluating signals of the at least one sensor, wherein the signal evaluation module supplies a profile of the signals as a function of time, as a result of which at least one of the following variables can be determined: throughflow quantity, throughflow rate, throughflow velocity, macronutrients, and fat content.
5 . The breastshield unit according to claim 1 , wherein a sensor unit is present, wherein the sensor unit comprises the siphon of the milk channel and the at least one sensor.
6 . The breastshield unit according to claim 5 , wherein the sensor unit comprises a main body with a surface and with a cover tightly closing this surface, wherein at least the siphon of the milk channel is formed by a groove which is configured in at least one of the surface and the cover and which, by the cooperation of the surface with the cover, is tightly closed except for an inlet and an outlet.
7 . The breastshield unit according to claim 6 , wherein the surface is a radially outwardly oriented surface of the main body.
8 . The breastshield unit according to claim 7 , wherein the cover is one of a lid or a sleeve.
9 . The breastshield unit according to claim 6 , wherein the sensor unit comprises an interior which is open at the top and in which the surface is formed in an undulating shape, and wherein the cover is configured as an undulating counterpart.
10 . The breastshield unit according to claim 6 , wherein the main body comprises a cavity for receiving an electronics unit.
11 . The breastshield unit according to claim 10 , wherein the electronics unit comprises the signal evaluation module.
12 . The breastshield unit according to claim 5 , wherein the sensor unit has the shape of a circular cylinder or the shape of a truncated cone.
13 . The breastshield unit according to claim 1 , wherein the at least one sensor is at least one optical sensor.
14 . The breastshield unit according to claim 1 , wherein more than one sensor is present, and wherein different sensors are present.
15 . A sensor unit of a breast pump for expressing human breastmilk, wherein the breast pump comprises a breastshield for placing onto a human breast, a milk collection container for receiving expressed breastmilk, a milk channel extending from the breastshield to the milk collection container, and at least one sensor for detecting the breastmilk, wherein the milk channel defines a direction of flow of the breastmilk, the sensor unit comprising a part of the milk channel, wherein this part of the milk channel forms a siphon, and the at least one sensor for detecting the breastmilk being arranged in the sensor unit downstream from the siphon in the direction of flow of the breastmilk.
16 . A method for determining at least one property of human breastmilk during expression of the human breastmilk, wherein the breastmilk is expressed by application of a changing negative pressure, wherein the method comprises:
collecting the breastmilk in a damming region of a siphon region,
emptying the damming region batch by batch via a siphon loop of the siphon region to form a breastmilk column,
forwarding the breastmilk column to at least one sensor,
detecting the breastmilk column, which has been forwarded batch by batch, by means of the at least one sensor, and
evaluating signals of the sensor as a function of time.
17 . The breastshield unit according to claim 5 , wherein the sensor unit is arranged between the breastshield adapter and the milk collection container.