Breast Pump Elastic Membrane Radial Compression Suction
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Solution Overview
Problem
Conventional breast pumps cause pain and edema in nursing mothers due to inadequate mimicry of the natural suckling action, failing to replicate the mechanical and suction cycles of an infant, particularly in applying radial compression to the nipple.
Innovation Solution
A breast pump with an expandable and contractable elastic membrane that applies radial mechanical compression and hydraulic or pneumatic suction to mimic the infant's action, including nipple extension and compression to control edema, using a combination of suction and positive pressure to replicate the natural nursing cycle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional breast pumps apply only suction to extract milk, then milk extraction is achieved, but pain and edema occur in the nipple
Solution Approach 1:
The breast pump applies periodic cycles of suction followed by compression phases. During the suction phase, negative pressure extracts milk from the nipple. During the compression phase, positive pressure is applied to the areola region to compress the nipple and reduce edema. This periodic alternation between extraction and compression resolves the contradiction by preventing continuous harmful suction while maintaining effective milk removal.
Solution Approach 2:
Instead of applying only negative pressure (suction) as in conventional pumps, this invention applies positive pressure (compression) during specific phases to counteract the harmful effects of suction. The compression phase inverts the pressure approach by using positive pressure to reduce edema and pain, thereby resolving the contradiction between extraction effectiveness and harm prevention.
2Productivity
If breast pumps use only vacuum pressure, then milk can be extracted, but the natural suckling action is not replicated
Solution Approach 1:
The breast pump dynamically changes pressure parameters by alternating between negative pressure (suction) and positive pressure (compression) phases. This parameter variation replicates the complex pressure profile of natural infant suckling, which involves both negative pressure during milk extraction and positive compression during swallowing. The changing pressure parameters enable both effective extraction and faithful replication of natural behavior.
Solution Approach 2:
The system transitions from static vacuum application to dynamic pressure cycling. The pump alternates between suction and compression phases, creating a dynamic pressure environment that mimics the rhythmic nature of infant suckling. This dynamic approach allows the pump to replicate not just the extraction function but also the temporal pattern of natural feeding, resolving the contradiction between productivity and behavioral fidelity.
3Device complexity
If radial compression is not applied to the nipple, then the pump structure is simpler, but edema cannot be controlled
Solution Approach 1:
The breast pump performs multiple functions within a single device: milk extraction through suction and edema control through compression. The same pump mechanism that generates negative pressure for extraction also generates positive pressure for compression during alternating phases. This multi-functionality adds compression capability without requiring entirely separate devices, resolving the contradiction between structural simplicity and edema management.
Solution Approach 2:
The suction and compression functions are merged into a single integrated system. The pump combines negative pressure generation and positive pressure generation capabilities in one device, allowing both milk extraction and edema control to be performed simultaneously through time-multiplexed operation. This merging resolves the contradiction by providing comprehensive functionality while maintaining a unified device structure.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The breast pump effectively brings on a Milk Ejection Reflex, extends the nipple, creates sufficient suction for milk extraction, and applies radial compression to prevent edema, improving milk extraction and collection while reducing discomfort.
Implementation Method 1
applying radial mechanical compression (positive pressure) to replicate compression of the nipple by the infant's tongue
Implementation Method 2
applying hydraulic or pneumatic suction (negative pressure) to extend the nipple and to extract milk
Implementation Method 3
Mechanical stimulation of the areola, presumably by the infant's gums and tongue brings on repeated MERs. Oxytocin causes contraction of the starfish-like myoepithelial cells surrounding the alveoli causing intra-ductal pressure to increase, squeezing the milk forward toward the nipple tip
Data Source
AI summary
A breast pump device and associated methods for extracting breast milk are disclosed. A pump head comprises an external shell with an elastic membrane disposed and bonded therein to define at least one hermetically sealed chamber. Manipulation of the elastic membrane, for example, by adjusting suction or pressure in the sealed chamber or within an interior volume defined by the elastic membrane permits radial mechanical compression (positive pressure) to be applied to a nipple positioned in the pump head to simulate compression of the nipple by the infant's tongue and simultaneously permits axial hydraulic or pneumatic suction (negative pressure) to be applied to the nipple to simulate the infant's minimum intra-oral vacuum. The breast pump device of the present invention can generate these simultaneous compressions and suctions with a single vacuum source, which may be an electric pump or a hand-operated mechanical pump.