Understanding Pumping

[namsokiek]

So I’m trying to wrap my mind around all the information regarding pumping. I’ve read all the sticky’s and am now trying to consolidate the information.

I understand the value of manual work right before entering the pump. Loosen things up, get the blood in.

I understand the importance of entering erect. Maximize internal pressure before vacuum.

Lube is required to create a seal at the base and reduce friction along the shaft when milking.

Low vac is less damaging than high pressure.

The bit I don’t completely understand is edema prevention.

Root cause of edema: The vacuum pulls fluids into the penis. First to come is blood into the CC and CS. This is because the circulation system is the path of least resistance. This is good. The limiting factor is the flexibility of the tunica. Second to come is fluid between the tunica and the skin. This is not a normal path of movement so likelihood of this occurring increases with time under vacuum or increased vacuum. This is edema and bad.

When you’re conditioned you don’t get edema. So, what prevents the fluid migration between the tunica and the skin? Is it the interaction of packing the cylinder? This means your tunica is flexible enough to expand to the ID of the cylinder relieving the vacuum along the shaft and occluding the path of fluid between the tunica and the skin. Is this correct?

How do condoms or silicone sleeves prevent or reduce edema? Is it because the condom provides some resistance to expansion and, when the tunica expands, occludes the path of fluid between the tunica and skin?

When you move up in cylinder size are you again at risk of edema until you pack the cylinder?

[BigO]

Edema is reduced because of lower pressure. Edema is fluid being drawn into your dermal layers ( skin) when the draw of force is more than it should be or the pressure is held for too long. To avoid this it is recommended to start with lower pressure and o set a day or every other day starting with 5 minutes at a time, after a week try going for 10 minutes. Week two you may try a 10 minute set and a 5 and if you condition well you can try two 10 minute sets. Eventually if you monitor your self and progress safely you will be able to do 20 minute sets and then 2 and even more.

For whatever reason you will be able to increase time and sets with in a few weeks to a month. If you try 20 minute sets right away you may get lucky but usually a non conditioned penis ( for pumping ) will suffer edema. I would stay safe and start with 5 minutes for at least the first week, maybe two sets of 5 minutes.

The reason that condom pumping helps to prevent edema is that the condom puts pressure on your skin and kind of sets a barrier around it. The inward force of the condom kind of counter acts the outward force of the fluid. It is basically making another layer of strength that the fluid has to battle to get where it wants. I have even heard of people using much thicker materials so they can do extreme pumping, I would not recommend that though, just try it with your dick and a pump.

For many who pack the cylinder edema is the reason they do so. Once you are experienced you will be able to pack without edema but it is a learning process.

[namsokiek]

Thanks BigO. So a conditioned penis will not suffer edema when they move to a bigger cylinder?

[BigO]

You can still suffer edema if you over do it but you will be able to handle a lot more with experience then when you start out. I can do 4 sets of 20 to 30 minutes with zero edema now at about 5-6 hg, when I started if I would have done one set at 6 hg for 20 minutes my pickle would have looked like a water balloon.

[namsokiek]

BigO, cool.. But I'm still confused regarding the aspect of "being conditioned" which inhibits the edema? Do the dermal layers change?

I envision the process as a battle to equalize pressure. The cylinder is the only fixed dimension. The penis goes under vacuum and the easiest way to reduce the vacuum is for blood to enter the CC and CS. This brings the tunica either to its limits of flexibility or to the ID of the cylinder. If the tunica is able to expand to the ID (pack), the pressure is equalized.

If the tunica cannot expand to pack the cylinder, the pressure then draws fluid into the skin, which is edema. The fluid can continue to flow until the tube is packed or pressure is released. Either way, the pressure under the skin is equalized.

Wearing a condom adds a layer which offers compression that, as you said, slows the flow into the dermal layers. It does this by reducing the effective vacuum on the penis and pressure equality is reached at a lower pressure.

In each of these there is a mechanism where the pressure is equalized. I don't find a mechanism that prevents edema in a conditioned penis that is not packing the tube?

Don't misunderstand me. I totally believe it can happen, I just haven't figured out how. From your experience, how do you think it happens?

[Wolfemother]

Have a read through this. It explains time dependent strain rate deformation.
Balloon Science: Physics

[sssssteve]

I found the best solution to concentrate the pressure of the vacuum on the inner chambers: use a silicone "stroker" (pocket pussy) inside of the tube. the uniform pressure discourages fluid buildup while maintaining blood in the inner chambers.

[BigO]

What you need to understand that it is blood that will fill the chambers, but it is a water like fluid that is drawn up and into the skin. You will not decrease the effect on the expansion of the tunica buy restricting the outward expansion on the skin. As a matter of fact many who use these techniques claim to have a fatter flaccid and a better overall pump once they are finished.

[JonPop]

The"water" like fluid that is being referenced to is "LYMPH" fluid.
This is being drawn from the lymph glands in the groin and pelvic area.
I find that if I pump too many sets in a day, that I will get a pretty good size doughnut under my glans, that
will take many hours to dissipate.

The best way to avoid this is a really good warm up with a rice sock, pump at around 3-4 Hg and a set of no more than 20 minutes.
I also very carefully watch the color of my penis so as not to let it get much past it's normal skin color.
Also, while in the tube, either soak in a good hot bath or wrap a hot rice sock around the tube during the duration of the set.
I have experienced no ill effects from Lymph fluid buildup, but feel that it's not something you want to happen on a regular basis.

[BigO]

Thanks for finding the word, I swear it was eluding me. I also avoid lymph fluid build up. In my opinion when you get the donut effect you have really taken away from your work out. If I even feel or see the slightest hint of it I end my workout immediately. Being well conditioned and fortunate I very seldom have an issue with the build up of lymph fluids. I spent a lot of time earlier on finding my limits with time and pressure so I could get with in a few minutes of the onset and never go past that limit

Great explanation JP