Source of Blood with VED

[StanWest]

Hello the Forum, Thanks to this forum, I have learned a lot. My Urologist thanks me for in informing him at times
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My ED began perhaps 2 ~ 2 1/2 years ago. I became totally flaccid. Found my testosterone level below (1/2 of) lowest normal. Age 68 then. Started using a home made pump. Lab grade vacuum pump, hospital grade regulator with built in gage. Cheaper blue plastic chamber. Only the chamber causing problems sucking in balls (ouch).

At first pump did NOTHING. 1 inch flaccid. Viagra or tadafil nada. From forum, continued pumping (continues). After ten uses started bring life back to cock. Now close to original length 6" (sometimes). Not great, not tiny, and sure precious to me. Just to have it in good health. I also have venous leakage. I read about fill and release, fill and release. Great. Oh yes, great. I have had to inject last 1 1/2 years trimix. Now have had intercourse 3 times with using the ring along. Not as firm as with trimix and ring together, but very nice, firm enough I don't get the SLINKY effect. By that I mean a compression in lengthening in then expanding, the pulling a springy cock out (stretching in length as I pull outward) then returning to nominal size. This is from about 1 month of fill then drain pumping.
>>>>>>>>>>>-----Blood Source----------<<<<<<<<<<<<<<<
Observing how fast I can become erect with stimulation from my wife and then seeing how much faster I fill using the pump, caused me to ponder on why the difference. I suspect I am filling with blood supply from vein. The "used" (oxygen depleted)blood. So, with repeated fill to erect then drain to flaccid, I am getting much more nutrients and oxygen than I get from lack of enough early morning erections. If this assumption is correct, then fill and release is a very important technic in using a vacuum pump.

Any other thoughts on this??
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Thanks

[dtwarren1942]

I have read (no longer can produce source) that when you pump, 60% of the blood comes from the arteries and 40 % is drawn back from the veins.

[StanWest]

Thanks Dt Warren. With me, I usually need in injection to get up. Figured arterial blood would not be as easy to draw in. Perhaps the medical condition affects ratio of blood source. I am glad you posted that.

[Lost Sheep]

I will venture a guess (or perhaps a hypothesis - but I have no way of really testing it) that if you use the vacuum pump, you will pull blood into your penis (both cavernosum tissues and spongiosum tissues) in a certain ratio of venous to arterial. Then, if you exercise aerobically (bringing your heart rate up and dilating your blood vessels) and immediately use the vacuum pump, you will both change the ratio of venous to arterial blood entering your penis, but also achieve inflation quicker.

An interesting experiment if you choose to do it. I don't know what conclusions you could draw from it or what you would have to do to establish controls.

[StanWest]

Hello LostSheep,
Thanks for the response. My thoughts on this stem from learning to pump and release. Exchanging the blood in penis for more oxygen and nutrients. Doing this has caused improvements. It started me think about the source of the blood. If it is from the vein (or a significant portion) then the oxygen and nutrient level is reduced, makes it important to fill and release. Not one to believe in to many absolutes, it is sure to be a mix of both arterial and venous. That mix must depend on the physical condition of the person. So, to determine that for me, it would only apply to me. I have to inject to get enough arterial blood to erect fully, used to be AT ALL. Pumping helped do that. A ring, which does no keep me from erection after injection, definitely does slow down the venous leakage. Anyway, I feel it is valid when pumping for health (Oxy and nutrients) to fill and release repeatedly.

Thanks for the response.

[AnotherOldMan]

From a study on the use of VED's for penile rehab ---The science of vacuum erectile device in penile rehabilitation after radical prostatectomy
Haocheng Lin1 and Run Wang,

"Physiologically, the VED uses negative pressure to distend the corporal sinusoids and to increase blood inflow into the penis (13), which causes penile passive engorgement. Bosshardt et al. confirmed that there is a passive congestion of mixed arterial and venous blood, with extra-tunica tissue making up a large component of the increased diameter. Their data showed that mean SO2 of corporeal blood immediately after VED induced erection was 79.2% in the patient. 58% of blood with VED induced erection was arterial and 42% of blood was venous in origin (38). Our animal study confirmed their findings and suggested VED application increases the arterial blood inflow to the penis to reverse the hypoxia process."

[Lost Sheep]

VED induced erection was 79.2% in the patient. 58% of blood with VED induced erection was arterial and 42% of blood was venous in origin (38). Our animal study confirmed their findings and suggested VED application increases the arterial blood inflow to the penis to reverse the hypoxia process."

Cool! Thank you, AnothyerOldMan. That confirms what I had (without scientific evidence) what I had thought (hypothesized).

Now, to figure out if getting one's blood flow up by aerobic exercise would change that ratio

I will venture a guess (or perhaps a hypothesis - but I have no way of really testing it) that if you use the vacuum pump, you will pull blood into your penis (both cavernosum tissues and spongiosum tissues) in a certain ratio of venous to arterial. Then, if you exercise aerobically (bringing your heart rate up and dilating your blood vessels) and immediately use the vacuum pump, you will both change the ratio of venous to arterial blood entering your penis, but also achieve inflation quicker.

An interesting experiment if you choose to do it. I don't know what conclusions you could draw from it or what you would have to do to establish controls.

[oldbeek]

I have an implant, do I need to use a VED to get sponginaousm blood flow. With the implant, I get my erection but my glans is still cold. (All nerves removed during RP.) I feel my sponginaosum is cold and dying.

[Odecko]

Did anyone ever provide feedback for your issue? I’ve been cold headed since receiving my pump in Dec 2021. Now taking Cialis 20mg to help with blood flow. Should I take it daily or before anticipating sex?