A penis pump is cylinder usually made of acrylic which is placed over the penis. There is usually an attached pump which is used to create a vacum within the cylinder and around the penis. This vacum effect litterlay draws blood into the penis and engorges till it is full.

Well the concept seems pretty sound. Utilize a vacum to increase blood flow and increase the size of the erectile tissue. The only problem is that it is very hard to control the proper pressure and it is an unatural state for the body to be in. Long periods of use which are required in by most penis pump manufactures creates a larger pressure within the pump than the inner blood pressure. This excessive pressure can cause severe vascular damage. Pumps are successfully used with erectile dysfunction but they are only used for a few minutes achieve an erection and then the user is instructed to place a compression ring around the erect penis and then release the vacum.
Use of a penis pump must done with extreme caution. Excessive pumping can cause vascular damage inclusing burst blood vessels. Because of the powerful vacumm the testicles can be injured in certain cases where the vacum pulls the testes into the cylinder. Also, the cylinder can cause cuts from rim being pushed into the skin and damaging ligaments and penis tissue.
Penis pumps can be used safe and effectively when used for erectile dysfunction and prescribed by a doctor. The types of pumps that are supplied specifically for ED are made of a higher quality. Also, the users are well prepped on how to best use the device and the amount of time required to be within the vacumm chamber is under a couple of minutes which is safe. Penis pumps are popular amongst men who do not want to use any form of medication. Although, many men use a combination of medication and a penis pump. Finally, the long term cost of using a penis pump is much lower than continual medication and therefore a cost effective solution for many men.
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