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The working face of the suction cup is made of elastic, flexible material and has a curved surface. [3] When the center of the suction cup is pressed against a flat, non-porous surface, the volume of the space between the suction cup and the flat surface is reduced, which causes the air or water between the cup and the surface to be expelled past the rim of the circular cup.
A suction cup is placed onto the head of the baby and the suction draws the skin from the scalp into the cup. Correct placement of the cup directly over the flexion point, about 3 cm anterior from the occipital (posterior) fontanelle, is critical to the success of a vacuum extraction. [2] Ventouse devices have handles to allow for traction.
Inside the self-sealing suction cup, the plug is positioned close to the tube opening so that it can get sucked into the tube seal the hole when the central suction line is powered. A pair of springs connected to the suction cup's base helps maintain the plug's position, restoring the plug seal in the absence of object forces.
The ideal back for the woman on-the-go, this crossbody bag is designed to hold just your essentials: phone, keys, wallet, and perhaps a lipstick or two. Choose from 27 different colors and patterns.
The ideal back for the woman on-the-go, this crossbody bag is designed to hold just your essentials: phone, keys, wallet, and perhaps a lipstick or two. Choose from 27 different colors and patterns.
This 7-inch dildo is made of body-safe, waterproof, and hypoallergenic silicone, and features a suction-cup base that makes it perfectly versatile, allowing everything from solo hands-free ...
Nano-suction is a technology that uses vacuum, negative fluid pressure and millions of nano-sized suction cups to securely adhere any object to a flat non-porous surface. When the nano-suction object is pressed against a flat surface, millions of miniature suction cups create a large vacuum, generating a strong suction force that can hold a ...
When the vacuum is applied to the infant's head, the tension creates a difference in pressure between the atmosphere and the infant's scalp that causes the soft tissue layers of the scalp to fill inside the suction cup. [5] [6] Subsequently, interstitial fluid and small hemorrhages build up, causing the head to swell and forming a localized edema.