I could have missed it, but I didn't see much on the judicial use of pure glycerin. For my patients who are truly backed up and don't want a full enema (from either a bulb or a bag), here's what I do. I have a couple small 5cc plastic syringes. You can get them at any of the drug store chains. I force a 2-ft piece of clear, narrow plastic tubing to the end of the syringe (it's about the size of an 18 Fr catheter). File the other end of the tubing to remove any edges for safe, easy insertion. I suck up two full syringes of glycerin (then get all the air out of the tubing). I get glycerin at Walmart in 4 oz bottles. It's on the shelves with the face care products (go figure).
The results will be pretty quick.--in 5-10 minutes, the urge to go will be pretty intense. If holding an enema produces erotic feelings for your patient, have them hold it longer such as for 10-15 minutes. So here's what you do. Have your patient lie on her/his side, tummy, or favorite enema position. Lube the tubing real well. Slowly insert the tubing its full length, but resist the urge to insert it any way other than gently. Stop at the least feeling of resistance, but generally it'll slide in easily. Now, slowly inject the full syringe of glycerin into the bowel. This part of the procedure will inject the glycerin nice and high into the large intestine (unlike a Fleet enema). Remove the tubing. Now insert the second tube about six inches into the rectum, and inject it there. Now you've got a nice, even distribution of glycerin. If this is an erotic time for your patient, do for them or let them do whatever they enjoy erotically. When they orgasm, I've never had anyone lose anything. Then march them to the toilet, and have them expel the glycerin and feces.
If you want to subsequently use a water rinse, that's good too. But the nice part of this procedure is that after your patient uses the toilet, the urge to go soon disappears and doesn't return. The reason is that you haven't actually used very much glycerin (10cc's, total).
If you'd like photos of the syringes and tubing apparatus or have questions, just write me directly at bob4579@hotmail.com (I don't log onto Zity often).