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It is made with 'plastimake' which is polycapralactone polymer. It is biologically inert, the material safety sheet says you can even eat it. It is a moldable, pliable modelling polymer. I bought the modelling variety. You just heat it in hot water and then you can model with it like stiff play-doh. When it cools it becomes strong and rigid. Its ridonkulously strong, with those wall thicknesses you could never break it by hand, and if it does deform it necks and becomes stronger as the polymer chains align, just like nylon does. They are easy to make. I take 100g of the polymer, heat it up, knead it and form it around to make a tube, then slowly model it to make that shape. That one took me about 20 minutes to create. You can reheat it to get it pliable again and modify it to get the perfect shape for your body.

I have done lots of experimention with commercially available hollow butt plugs to produce temporary anal incontinence. I've spent hundreds of dollars trying every model from the most expensive Oxballs to the cheapest chinese knockoff. But they all fail: either from being uncomfortable/painful, not retaining, not lining up to the rectum to pass stool, collapsing, impossible to insert, painful to insert, etc.. So I have taken all that onboard and designed and made the best transanal stent (hollow buttplug) in the world. I have made it from rigid polycaprolactone, and it's very strong and comfortable, but i expect if it was poured silicone, you wouldn't even know it was in. It takes a little to get it in. If you have less experience in anal play with good size toys, you might want to make it in a smaller size. The most important feature is the long stem (the anal sphincter is a long band of muscles, not a little donut) and the anatomical bend. Dont skimp on the length of the tail. If it's too short the stent is always being pulled outwards, which leads to instability and discomfort. I've worn this fellow overnight. Its very comfortable and very easy to sleep in.

It's interesting that such a little step is all that is required to provide stability. But I'm not sure I'm willing to trust glue. How strong do you find the silicone to silicone bond. Will it tear the base material before giving up?

Spargano, I look forward to seeing a picture of your new design, it sounds interesting. But I can't get my head around how the o-rings are attached and where they sit, and how they interact with the holes in the silicon tube.

I am pretty sure the original design back in 2010s had two seperate pieces for the bends and that the OP mentioned being able to slide them to change the length in the prostate.

Thats a really interesting design. The only thing that worries me is a medical case study i read once of someone who couldnt remove an inserted object because it had tied itself into an overhand knot in his bladder. This design looks like it could be prone to this.

I was unsure about the new single inner bend design. I have always used Cathdiap's original instructions using two internal bends parts. But today I made one up with a single piece inner, and after only the insertion and an hour of wearing, I am a total convert. The insertion was actually much easier. The flexibility of the two bend stent actual works against the insertion, as the stent can bend and in the worse case will fold a bit to present sharpish edges. The single piece stent eliminates this problem. During insertion I felt a very clear clear of the external sphincter, then a very solid clicking into place when the first bend cleared the bladder neck. Flow was almost immediate and now as the slight burn of the insertion is fading, the stent almost is unnoticeable. So far I think I am a convert, but I will see how I feel in a few hours.

It won't work. At best you can manage dyssynergia between bladder contractions and sphincter relaxation. Medical science has tried it - looking for solutions for people with spinal injuries and found no answer. But I saw a paper once that found one method was to stent the external sphincter and then excite bladder contractions with a low intensity 20Hz tens signal from the prostate to the hip. And before people freak out, e-stim users have used urethral electrodes completely safely for decades. I have tried it. (For science) You need a reasonable full bladder and a fully programmable e-stim unit. The sensation is a little tingle on the hip electrode and an unsignalled squirt of urine. But once you've got something in your dick, it may as well be a full stent rather than a Frankenstein tens electrode.

My theory about sparganos mess was that he left too long a length of sililicone tube in front of the front bend. This has allowed the tube to fold over on itself when he has tried to push it into the prostatic sphincter. The folded tube has quite sharp corners and this is what has scraped up his urethra as he has pushed these sharp edges through the prostatic urethra.

That's a shame CD. Your concept has let lots of people develop their own stent safely. I have had a tiny spot of blood once, when my bladder was a little filled and I must have been pushing against clenched sphincters. And that freaked me out. Probably just a little scratch of the urethral lining. But what spargano shows looks truly awful. No one should play with stents till they have had plenty of experience with catheters. You've got to know what pushing through the sphincters feels like, how much to push, how to relax and not to be freaked out by the insertion and clench. There shouldn't be any pain. There should be a little resistance and then a weird, almost pleasant feel as the stent/catheter pushes through the sphincter, then again through the bladder neck.

If that is the case, and I don't know there have been any studies, I expect that the overall cleanliness around the tip of the penis is much better with undies and a collection bag, than a diaper. A wet diaper is a great route for fecal bacteria to move from your bottom to your front, even without any messing involved.

Somewhat surprisingly, it is the exterior of the indwelling catheter where the bacteria mostly grow. The flushing of the urine down the centre tube keep that part mostly clean.

Im no doctor, just a smartish guy with a ghoulish interest in the subject. Sphincterotomy and bladder neck resection is a major operation. So many people that try it, end up with strictures, and get the opposite of what they wanted. Then have to go through multiple procedures just to keep peeing. Plus it comes with the dangers of severe bleeding and infection. We like to think of the sphincters as little rubber bands of muscle that can be easily cut, but as stent makers we know better - we know they are wide bands of muscle deeply integrated into the surrounding structures. Stopping these from working isn't easy. The surgeon has to really cut deeply. Stick with your stents. Your likely to get a much better result than letting the surgeons take their lasers to your insides.

Good luck for your surgery. I hope it all goes smoothly and you get the result you hope for. I expect you will get some bleeding, there are a lots of blood vessels down there, but do discuss with your surgeon, what is too much bleeding, and when and if you should call for help.

Yes please zraihusky. We would love to see your stent.