eMedicine Specialties > Pediatrics: Surgery > Transplantation
Intestinal and Multivisceral Transplantation: Follow-up
Updated: Jan 24, 2008
Outcome and Prognosis
Patient and graft survival
The International Registry for Intestinal Transplantation reports that graft and patient survival rates have improved, with a 69% 1-year patient survival rate and a 55% graft survival rate since 1995.22 At the University of Miami, the 1-year patient survival rate is 75%, and the graft survival rate is 68% since 1994. Since 1998, the 1-year patient survival rate is 84%, and the graft survival rate is 72% (see Media file 9). In 1998, the authors introduced the ZVE and biopsy protocol and daclizumab induction therapy for all intestinal and multivisceral recipients. The authors attribute the improvement in patient and graft survival rates since 1998 to these 2 modifications in the program.
The authors are certain that earlier referral of the patients for intestinal transplantation yields improved survival results. The authors' results do show that isolated transplantation is preferable to combined liver-intestinal or multivisceral transplantation from a survival standpoint. Posttransplant prognosis is also improved when transplantation is performed prior to the onset of liver failure and prior to the exhaustion of all routes of vascular access.
Causes of death included the following:
- Sepsis after rejection
- Respiratory failure
- Sepsis
- Multiple organ failure
- Arterial graft infection
- Aspergillosis
- Posttransplantation lymphoproliferative disorder
- Intracranial bleeding
- Fungemia
- Chronic rejection
- Graft versus host disease
- Necrotizing enterocolitis
- Pancreatitis
- Pulmonary embolism
- Viral encephalitis
Future and Controversies
Current state of intestinal transplantation
Most recipients of intestinal transplants are free from TPN and enjoy an excellent quality of life. Intestinal transplantation has matured into a life-saving and cost-effective therapy for patients with intestinal failure.27 Rejection and infection are still the 2 most perplexing problems surrounding intestinal and multivisceral transplantation. Earlier patient referral, the development of new immunosuppressive agents, and the discovery of a serum marker for graft rejection are the keys to continued improvements in graft and patient survival rates.
Evolution and future directions
Since 1998, the authors have been changing many things, such as surgical technique, CMV prophylaxis, rejection monitoring with ZVE, new immunosuppression, and prevention of overimmunosuppression. These changes have contributed to the recent improvement in the survival rate.
Systemic drainage to the inferior vena cava has been applied, and results are satisfactory. Metabolic effect and survival rates are the same as for portal drainage. CMV-positive donors are used safely with intense CMV prophylaxis by CytoGam. Rejection monitoring with ZVE prevents the delay of the diagnosis of the rejection and overimmunosuppression. Zenapax, rapamycin, and Campath are ongoing new immunosuppression therapies. These evolutions have improved the results of intestinal transplantation since 1998. New findings from basic research may contribute to the improvement of small bowel transplantation.
Enterocytes have been studied at the University of Miami hospital. The study demonstrated the presence of host-derived (male) enterocytes in the intestinal allografts (female). The presence of male crypt cells and male enterocytes in the intestinal grafts suggested that they probably originated from circulating stem cells and that the differentiation process might have progressed from crypt cells to mature enterocytes. Generating enterocytes from a patient's own stem cells may be possible; this might assist in developing novel strategies to increase intestinal absorptive surface and repair and to engineer neointestines for patients with short bowel syndrome.
The authors' clinical study also demonstrated some promising preliminary data about serum citrulline as a marker for early acute cellular rejection after intestinal transplantation. These findings might help the rejection monitoring.
Newer immunosuppressive medications with more specific actions, further advancement of rejection monitoring, and infection control are urgently required. Continuing efforts will contribute to future success.
The authors gratefully acknowledge Brian Dunkin, MD, for his support involving endoscopy and patient care. The authors also acknowledge Joseph Tector, MD, for his support of this manuscript. The authors would also like to thank Debbie Weppler, RN, for her contribution of intestinal patient management and data collection.
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References
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Further Reading
Keywords
intestinal transplantation, multivisceral transplantation, polysplanchnic transplantation, intestinal failure, short bowel syndrome, total parenteral nutrition, TPN, cytomegalovirus, CMV, polysplanchnic transplantation, volvulus, thrombosis, encephalopathy, tetany, calcium deficiency, magnesium deficiency, hyperalimentation, necrotizing enterocolitis, mesenteric thrombosis, gastroschisis, desmoid tumor, intestinal atresia, Hirschsprung disease, Crohn disease, pseudoobstruction, microvillus inclusion disease, central vein thrombosis, cholestatic TPN-induced liver failure, catheter-associated sepsis, catheter-associated vascular thrombosis
Follow-up: Intestinal and Multivisceral Transplantation