Just a few friendly clarifying comments from a relatively experienced DBC enema user:
..........the only reason for using balloon inflatable nozzles are to my knowledge barium enemas. Due to the balloon, the catheter does not slip out of the anus. Barium enemas are used in the medical field to examine the colon. The catheter must remain for a longer time in its place.
Not really true. Many are used medically for enemas needing to be retained like either barium for x-rays or enemas for constipation and sometimes other reasons. But a great many are used recreationally like I do and many people here on Zity to hold either large or hard to hold enemas for various forms of entertainment and sexual stimulation. I use a Rusch double balloon latex catheter to hold 4-5 quart recreational enemas for over an hour for enjoyment and sexual stimulation. But I worked up to that from just a very few minutes to later enjoying them for over an hour without problems. Of course, if at any time you start to feel uncomfortable or painful feelings from your balloons, deflate it right away and be sure you are okay. Much harder to hold solutions (mine are easy - many harder ones listed by other members) pretty much require DBC's to retain.
The single balloon serves in the true sense to counteract slipping out. In contrast, the double balloon catheter achieves a higher seal against the single balloon.
True. The outer balloon once inflated exerts outward pressure on the inner balloon to keep it better sealed against your inner anal sphincter to minimize leakage.
I must also say that I do not know about normal enemas with balloon tubes in the medical field. But that does not mean that they are used. For high enemas with larger volumes of liquid, a longer rubber catheter is usually used, inserted between 10" and 15" deep.
Yes, these tubes, often called colon tubes, can put the entrance point of your enema water much higher above the rectum. They may or may not have widened portions or retention bulbs to help keep the water in.
There are many good balloon tubes available to the enema enthusiast. There are many good balloon tubes that are available to the enema enthusiast, starting with the soft latex with one and two balloons, which unfortunately can be introduced only with great skill, to the more stable balloon tubes of the company Rüsch, which also available with one and two balloons. In the double balloon version made of latex, in contrast to that of Rüsch, the two balloons are individually inflated. That may have its charms, because you can play with it.
Both Rusch and other designs and materials are easy and fun to insert once you have done it a few times, not requiring great skill. One company inflates both balloons at once, but most are separately inflated.
In any case, care must be taken in all embodiments that the balloons are not inflated too much and remain in the intestine too long, as this may lead to interruption or disruption of the blood supply to the intestinal mucosa. This can lead to great irreparable damage.
While this is certainly theoretically possible, it is a very rare occurrence. I have inflated my latex internal balloon (~250 cc's nominal volume) to over 10-12 full inflation pumps to a large size that feels very snug and full inside me and held it for several hours with no problems. If you ever feel any real discomfort or pain around your balloons, deflate it right away and check that you are still okay. Balloons do come in larger sizes as well, so it is wise to go carefully at first.
lovely regards
Neptun
P.S. Sorry, tried to make my responses non-italic, but they reverted back on posting.