Intestinal Pressure Meters for Safety

As a long time experienced Switch who both receives and gives discipline and punishment enemas, I have often wondered if there are any meters which might be mounted in the enema hose which would be capable of displaying the back-pressure being received from a recipient when he or she has been given a large load of fluid? I assume that these would have to be located between the nozzle and the shut-off clip. It would be able to give the Domme or Dom feedback to enable the determination of safety limits to pressure that can be tolerated, and also to watch during the retention period as it builds. If such a device exists, please post the name or link to a source of such a device.

If you would need one then you have too much pressure on the enema!

You do not need a meter. The pressure is determined by the height of the bag.

If you have had known intestinal problems, hang the bag lower, if you never had a problem, 5-6 feet is fine.

The pressure developed in a column of water is 0.43 PSI per foot.

You can do the math.

Sounds like a dial on Dr Frankenstein's colonic machine, lol! I'm sure this has been done before somewhere in the long history of well-meaning but unnecessary medical technology. The modern little spinning flow meters could give an indication of pressure building as they slow down. I think the muscle tone of both colon & abdomen would be too variable during an enema to make pressure measurement very useful.

droidgirl said

. . . . I think the muscle tone of both colon & abdomen would be too variable during an enema to make pressure measurement very useful.

That definitely is NOT correct.

If you had professional closed system colonics and watched the machine you would know that. During water inflow as well as with absolutely no water inflow or outflow, the pressure gauges absolutely tell what the intra-colonic pressure is.

@SwitchableSusie I'll admit I don't have any experience with the type of colonic machine you're talking about. However, I still can't see what measuring pressure externally at the machine has anything to do with what's inside the colon. Intra abdominal pressure might increase the pressure in one part while another relaxes.

@SwitchableSusie I'll admit I don't have any experience with the type of colonic machine you're talking about. However, I still can't see what measuring pressure externally at the machine has anything to do with what's inside the colon. Intra abdominal pressure might increase the pressure in one part while another relaxes.

There might be slight variations in different parts of the colon if you are having cramps (not enough to matter for safety sake) but the pressure registering on the machine and inside the colon are the same. They are connected by the waste output tube.

If you want to understand it, get a closed system colonic and watch the gauges. The fact is it doesn't matter if you understand it or not. The machine does register the intra-colonic pressure.

Hmm, I might have to invent a buttplug gauge.. Looks like a buttplug but has a gauge for pressure. Pretty soon I'll have commercials like the MY Pillow guy with a happy factory full of workers holding up gauges.. I'll be invited on the inventors show and sell 50% for millions..

My 2 cents a [pressure monitoring device would have to measure pressure throughout the length of the whole intestine i think what you asking about would only measure pressure at the area where the fluid is coming out at the nozzle. Just a thought

Based on the diameter of the colon and the length, with a fluid the pressure will be very similar. If you're close enough to danger to where the small differences would matter then you're too close to danger PERIOD.

If you just like dials for the look and want some more than that's a different thing.

When I was younger "Hang 'em High" would have been my motto. High, within reason.

Now, older, with some diverticula, I am far more conservative.

Hasn't stopped me from eating nuts, which I am told is tempting fate! Diverticulitis is no fun.

I don't think it matters what meters would be needed, or where they need to be attached. Just common sense is all you need.

Someone pleading for mercy needs relief. Anyone into enemas knows the feeling if their sub is begging for the water to stop. You know that feeling that the water is about to explode out of them, well come on we have all been there. I'd hope someone would have the sense to say stop! Thats enough! You should make sure she gets to the toilet safely to expel. Help her there!

Remember this sub has trusted you to know what your doing, so show some sense.

Oh by the way, if you don't know who the sub is, its the one with that hose attached to them.

Any way thats my opinion. That is what's expected of you............

Just wondering - without a double balloon nozzle or butt plug retaining the enema - can your anal sphincter hold back enough pressure that you "bust a gut" before you leak?

Just wondering - without a double balloon nozzle or butt plug retaining the enema - can your anal sphincter hold back enough pressure that you "bust a gut" before you leak?

YES

Just wondering - without a double balloon nozzle or butt plug retaining the enema - can your anal sphincter hold back enough pressure that you "bust a gut" before you leak?

YES

@SwitchableSusie But isnt that only determined by the pressure used to get the water in? If the water was infused from a constantly refilled open top bag at 3 ft in height above the rectum, could that EVER cause enough pressure to force the rectum/colon/bowel/intestine to burst?

At three feet, probably not, but if you use something like a shower shot or hang the bag high--absolutely.

There is also the concern about diverticula or other potential weak spots in the colon.

My concern is not the pressure going in because I rarely have the bag more than three feet above my butt, but once the enema is in and the cramps start trying to push it out and I am trying to retain it by clenching my butt. Can intestinal peristaltic pressure alone get high enough to be a problem? I suppose with a strong soap, or maybe M&M it would.

My concern is not the pressure going in because I rarely have the bag more than three feet above my butt, but once the enema is in and the cramps start trying to push it out and I am trying to retain it by clenching my butt. Can intestinal peristaltic pressure alone get high enough to be a problem? I suppose with a strong soap, or maybe M&M it would.

That depends on the person and how full they are. If you have very high internal pressure and are holding a couple of quarts, the solution will just get pushed around inside. Hold a gallon and it could be a different story if you are fully distended.

Cheryl77177 said... but once the enema is in and the cramps start trying to push it out and I am trying to retain it by clenching my butt. Can intestinal peristaltic pressure alone get high enough to be a problem? I suppose with a strong soap, or maybe M&M it would.

Your own colon muscle contractions are pretty slow so there's time to ease any tissue stretching. Irritants like soap or M&M just change the likelihood and number of contractions but don't exceed the force of anything you can't do normally without an enema. Excess enema volume just like any other abdominal trauma can shut down peristalsis altogether. Like SwitchableSusie mentions, a shower shot could raise pressure too high for safety when the colon is full. I like letting my own body or someone else's do most of the work taking an enema & distributing it with minimal external force 😄

I think some information about the Bracco Diagnostics PROTOCO2L inflator might provide some insight. This device is used to inflate the colon with CO2 (Carbon Dioxide) gas for virtual colonoscopies (A virtual Colonoscopy is done using special software to process a CAT scan). These scans are often used for patients who for various reasons cannot tolerate an optical colonoscopy, so many of these patients are probably quite 'fragile'.

The device has a electronic pressure regulator and a mechanical pressure relief valve to prevent injury to patients. The electronic pressure regulator, which is adjustable, with the recommended setting is right around 1 pound per square inch (which corresponds to the pressure from an enema bag a little over 2 feet above the patient), and a mechanical relief valve which is not adjustable. The mechanical pressure relief is considered a safety device, and is set to 2 pounds per square inch (psi) at the factory. That corresponds to a bag height about 4 1/2 feet high. It is a very safe bet that the 2 psi limit was selected to provide substantial margin of safety, I would regard any pressure not exceeding 2 psi to be very very safe.

@mattheww50 Great info, thx! I agree that the pressure relief valve would be set WAY below any danger level, especially for that sensitive or high risk group.

Mattheww, a big thank you for the spot on info!

As @SwitchableSusie points out, the height of the water column (bag) determines the pressure. Remember that flow occurs because there is a differential pressure between two regions (your colon and the water just inside the nozzle behind the tip opening. I won't go into Bernoulli equations related to flow and pressure) and flow will occur until the pressure is equalized.

The higher the water column (bag), the higher the pressure differential. Once your colon is nominally full, the liquid inside your colon is incompressible and the pressure exerted by the muscles has to "go somewhere" (think of blowing up a balloon, sealing it and then squeezing it). Having a nozzle that seals well to prevent leakage can be an issue if the colon is full and there is either a check valve or the clamp on the tube is closed (preventing backflow).

My own experience leaving the valve open and with no check valve is that the nominal equilibrium water column height is between 20-24 inches (~0.8-0.85 psi). During muscle contraction (backflow) that can be as high 36 inches or about 1.3 psi.

Although I like giving myself enemas that approach 4 liters (while using a DBC inflated enema nozzle and a check valve so that I can detach from the hose and bag), I am mindful of the internal pressure that can develop by being that full with no pressure relief. That isn't my "full volume limit" and the space left gives the enema solution someplace to go when the peristaltic contractions are trying to push the liquid through me.