Suction

Suction is the flow of a fluid into a partial vacuum, or region of low pressure. The pressure gradient between this region and the ambient pressure will propel matter toward the low pressure area. Suction is popularly thought of as an attractive effect, which is incorrect since vacuums do not innately attract matter. Dust is "sucked" into a vacuum cleaner when it is pushed in by the higher pressure air on the outside of the cleaner. The higher pressure of the surrounding fluid can push matter into a vacuum but a vacuum cannot attract matter.

Humans can create a sucking effect with the use of the lips, as in the case of drinking through a straw[class-7].

Pumps

Pumps typically have an inlet where the fluid enters the pump and an outlet where the fluid comes out. The inlet location is said to be at the suction side of the pump. The outlet location is said to be at the discharge side of the pump. Operation of the pump creates suction (a lower pressure) at the suction side so that fluid can enter the pump through the inlet. Pump operation also causes higher pressure at the discharge side by forcing the fluid out at the outlet. There may be pressure sensing devices at the pump's suction and/or discharge sides which control the operation of the pump. For example, if the suction pressure of a centrifugal pump is too low, a device may trigger the pump to shut off to keep it from running dry; i. e. with no fluid entering.

Suction (medicine)

In medicine, devices are sometimes necessary to create suction. Suction may be used to clear the airway of blood, saliva, vomit, or other secretions so that a patient may breathe. Suctioning can prevent pulmonary aspiration, which can lead to lung infections. In pulmonary hygiene, suction is used to remove fluids from the airways, to facilitate breathing and prevent growth of microorganisms.

In surgery suction can be used to remove blood from the area being operated on to allow surgeons to view and work on the area. Suction may also be used to remove blood that has built up within the skull after an intracranial hemorrhage.

Suction devices may be mechanical hand pumps or battery or electrically operated mechanisms. The plastic, rigid Yankauer suction tip is one type of tip attached to a suction unit. Another is the plastic, nonrigid French or whistle tip catheter. A suction unit is a device for removing liquids or gases by suction it from the patient. Professionals use it to remove mucus, serum or blood from a body cavity. Suction machine is used also for Home Care. Suctioning could remove fluids or mucus from airways. The potential of this machine could be in need also when you have a moist cough, and you’re unable to effectively clear secretions from the throat, or are having difficulty breathing.

Suction (album)

Suction is the third studio album by noise rock band feedtime, released in 1989 by Rough Trade Records.

Track listing

All songs written and composed by feedtime. 

Personnel

Adapted from the Suction liner notes.

Release history

External links

References