Breast pump flange inserts are accessories designed to customize the fit of standard breast pump flanges, which are often too large for many users. These inserts are typically made of soft, flexible silicone and fit inside the rigid plastic shield, effectively reducing the diameter of the tunnel where the nipple is drawn in. The goal of using an insert is to achieve a comfortable, snug fit, which is fundamental for efficient milk expression and preventing pain or damage to the nipple tissue. Using a properly sized insert directly impacts the amount of milk removed, as a poor fit can restrict milk flow and potentially lead to a reduced milk supply.
Determining Your Ideal Nipple Size
Accurately measuring the nipple is the crucial step toward selecting the correct flange insert size. The measurement should be taken of the nipple’s diameter at its base, right where it meets the areola, excluding any surrounding tissue. Measure the nipple when it is in a relaxed state, either before a pumping session or after gentle stimulation.
Use a ruler or specialized measuring tool to find the diameter in millimeters. Since the left and right nipples are often different sizes, each side must be measured independently to ensure a custom fit. Select an insert size that is 1 to 3 millimeters larger than your measured nipple diameter to allow for natural expansion during pumping. For instance, if your nipple measures 17 millimeters, select a 19-millimeter insert.
Choosing the correct size is crucial. An insert that is too small will cause the nipple to rub painfully against the tunnel walls, leading to friction and potential tissue damage. Conversely, a size that is too large may pull excessive areola tissue into the tunnel, which can reduce milk output and cause swelling. The correct fit ensures that only the nipple is drawn freely into the tunnel, maximizing comfort and milk flow.
Proper Installation and Pre-Pump Check
Installing the flexible silicone insert into the rigid plastic flange requires careful attention to ensure a secure and flush fit. The insert slides into the wider opening of the flange tunnel and must be pushed down until its rim sits completely flush against the inner wall. A straightforward method involves gently folding the flexible insert lengthwise, like a “taco,” to guide it deep into the tunnel.
Once positioned, unfold the insert and use your finger to push the edges firmly against the interior of the flange. The insert must be fully seated and not buckled, as any gaps or unevenness compromise the vacuum seal required for effective pumping.
Perform a “Pre-Pump Check” before attaching the pump to the breast. Visually inspect the flange from the back to confirm the silicone insert is smooth and securely seated without any ripples or gaps. If the insert is not flush, it may slip out or shift during the session, weakening the pump’s suction and reducing milk extraction.
Pumping Techniques and Troubleshooting During Use
Achieving an effective pumping session requires precise alignment of the nipple within the narrowed tunnel. The nipple must be perfectly centered before the pump is turned on to prevent rubbing against the silicone walls as it is drawn in and out by the vacuum. Proper centering minimizes friction and discomfort.
The flexible silicone may slightly affect the pump’s vacuum pressure compared to a hard plastic flange. You may need to increase the suction level to the maximum comfortable setting to maintain effective milk extraction. Pumping should never be painful; signs that the vacuum is too high or the size is wrong include a strong tugging sensation or the nipple changing color to white or blue.
If the nipple feels sticky or friction occurs, apply a small amount of food-grade lubricant inside the insert tunnel. A drop of olive oil, coconut oil, or a lanolin-based product helps the nipple glide smoothly, reducing irritation. If the insert slips out during the session, pause the pump, re-seat the insert flush against the flange wall, and then resume pumping.
Cleaning and Maintaining Flange Inserts
Consistent cleaning is necessary to maintain hygiene and preserve the integrity of the silicone material. After each pumping session, immediately separate the inserts from the plastic flange and rinse them with warm water to remove residual milk. Hand washing with a mild dish soap and warm water is the most common cleaning method.
Use a clean, soft bottle brush or a dedicated silicone brush to gently scrub the entire surface, paying close attention to the interior of the tunnel where residue collects. Avoid using abrasive soaps or stiff-bristled brushes, as these can scratch or degrade the silicone. Rinse the inserts thoroughly under running water to ensure no soap residue remains, which could affect the milk’s taste or cause irritation.
Allow the inserts to air dry completely on a clean surface or drying rack before storage. While some silicone products can be sterilized, consistently subjecting the inserts to high heat may shorten their lifespan and cause the material to become tacky or brittle. Periodically inspect the inserts for signs of wear, such as tears, discoloration, or a change in texture, and replace them promptly.