Mace procedure in medicine
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MACE Procedure in Medicine: Overview and Indications
The Malone Antegrade Continence Enema (MACE) procedure is a surgical technique designed to help patients with chronic constipation or fecal incontinence, especially when other medical treatments have failed. It is most commonly used in children but is also an option for adults with neurogenic bowel or severe functional constipation. The procedure creates a channel, often using the appendix, to allow regular flushing of the colon and improve continence and quality of life Souders2022Pmy2017Curry1999+2 MORE.
MACE Procedure Technique and Surgical Variations
The standard MACE procedure involves using the appendix to create a conduit between the skin and the colon, allowing antegrade enemas to be administered. Variations include using the appendix in situ, reimplanting it, or using a tapered ileum if the appendix is unavailable. The procedure can be performed via open surgery, laparoscopically, or with robotic assistance. Minimally invasive approaches, including robotic-assisted techniques, have been shown to be feasible and may offer improved cosmetic outcomes and potentially fewer complications Souders2022Ali2022Zee2017+1 MORE.
Effectiveness and Outcomes in Pediatric Patients
In children, the MACE procedure is well established and has high success rates for managing fecal incontinence and refractory constipation. Studies report that most pediatric patients achieve significant improvement in continence, with overall success rates (full and partial) ranging from 87% to over 92% Pmy2017Curry1999Peeraully2014+2 MORE. Quality of life, social confidence, and independence are often greatly improved after the procedure . Careful patient selection and dedicated follow-up are important for optimal outcomes Pmy2017Peeraully2014.
Effectiveness and Outcomes in Adult Patients
While the MACE procedure is less common in adults, it can be a feasible option for those with neurogenic bowel or severe constipation who have not responded to other treatments. However, the success rate in adults is generally lower than in children, and complications or abandonment of the procedure are more frequent. Identifying suitable adult candidates and addressing technical and compliance issues are key to improving outcomes Souders2022Gerharz1997.
Complications and Long-Term Considerations
The most common complication of the MACE procedure is stomal stenosis, which may require revision surgery. Other complications include stomal leakage, prolapse, and, rarely, more serious issues like volvulus or bowel obstruction. Despite these risks, most patients who continue to use the MACE channel report good long-term continence and satisfaction Curry1999Gerharz1997Peeraully2014+1 MORE. Some patients may eventually have the procedure reversed if normal bowel function returns .
Patient and Family Perspectives
Patient and family satisfaction with the MACE procedure is generally high, especially after long struggles with incontinence or constipation. Most report significant improvements in hygiene, social participation, and overall quality of life, though some note the daily time commitment and occasional discomfort as challenges .
Conclusion
The MACE procedure is a valuable surgical option for managing severe constipation and fecal incontinence, particularly in pediatric patients and select adults. It offers high rates of continence and improved quality of life, though careful patient selection, surgical technique, and ongoing support are essential to maximize benefits and minimize complications Souders2022Pmy2017Curry1999+4 MORE.
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