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Three progressive phases of ischemic colitis have been described:<ref>{{cite journal | author = Medina C, Vilaseca J, Videla S, Fabra R, Armengol-Miro J, Malagelada J | title = Outcome of patients with ischemic colitis: review of fifty-three cases. | journal = Dis Colon Rectum | volume = 47 | issue = 2 | pages = 180-4 | year = 2004 | id = PMID 15043287}}</ref><ref>{{cite journal | author = Simi M, Pietroletti R, Navarra L, Leardi S | title = Bowel stricture due to ischemic colitis: report of three cases requiring surgery. | journal = Hepatogastroenterology | volume = 42 | issue = 3 | pages = 279-81 | year = 1995 | id = PMID 7590579}}</ref><ref>Boley, SJ, Brandt, LJ, Veith, FJ. Ischemic disorders of the intestines. Curr Probl Surg 1978; 15:1.</ref><ref>{{cite journal | author = Hunter G, Guernsey J | title = Mesenteric ischemia. | journal = Med Clin North Am | volume = 72 | issue = 5 | pages = 1091-115 | year = 1988 | id = PMID 3045452}}</ref><ref>{{cite journal | author = Cappell M | title = Intestinal (mesenteric) vasculopathy. II. Ischemic colitis and chronic mesenteric ischemia. | journal = Gastroenterol Clin North Am | volume = 27 | issue = 4 | pages = 827-60, vi | year = 1998 | id = PMID 9890115}}</ref>
Three progressive phases of ischemic colitis have been described:<ref>{{cite journal | author = Medina C, Vilaseca J, Videla S, Fabra R, Armengol-Miro J, Malagelada J | title = Outcome of patients with ischemic colitis: review of fifty-three cases. | journal = Dis Colon Rectum | volume = 47 | issue = 2 | pages = 180-4 | year = 2004 | id = PMID 15043287}}</ref><ref>{{cite journal | author = Simi M, Pietroletti R, Navarra L, Leardi S | title = Bowel stricture due to ischemic colitis: report of three cases requiring surgery. | journal = Hepatogastroenterology | volume = 42 | issue = 3 | pages = 279-81 | year = 1995 | id = PMID 7590579}}</ref><ref>Boley, SJ, Brandt, LJ, Veith, FJ. Ischemic disorders of the intestines. Curr Probl Surg 1978; 15:1.</ref><ref>{{cite journal | author = Hunter G, Guernsey J | title = Mesenteric ischemia. | journal = Med Clin North Am | volume = 72 | issue = 5 | pages = 1091-115 | year = 1988 | id = PMID 3045452}}</ref><ref>{{cite journal | author = Cappell M | title = Intestinal (mesenteric) vasculopathy. II. Ischemic colitis and chronic mesenteric ischemia. | journal = Gastroenterol Clin North Am | volume = 27 | issue = 4 | pages = 827-60, vi | year = 1998 | id = PMID 9890115}}</ref>


*A hyperactive phase occurs first, in which the primary symptoms are severe [[abdominal pain]] and the passage of [[bloody stools]]. Many patients get better and do not progress beyond this phase.
*Hyperactive phase occurs first
**Primary symptoms are severe [[abdominal pain]] and the passage of [[bloody stools]].  
**Many patients get better and do not progress beyond this phase.


*A paralytic phase can follow if ischemia continues; in this phase, the [[abdominal pain]] becomes more widespread, the belly becomes more tender to the touch, and bowel [[motility]] decreases, resulting in abdominal bloating, no further [[bloody stools]], and [[absent bowel sounds]] on exam.
*Paralytic phase can follow if ischemia continues
**[[abdominal pain]] becomes more widespread, the belly becomes more tender to the touch, and bowel [[motility]] decreases
**Resulting in abdominal bloating, no further [[bloody stools]], and [[absent bowel sounds]] on exam.


*Finally, a shock phase can develop as fluids start to leak through the damaged [[colon]] lining. This can result in [[Shock (medical)|shock]] and [[metabolic acidosis]] with [[dehydration]], [[hypotension|low blood pressure]], [[tachycardia|rapid heart rate]], and confusion. Patients who progress to this phase are often critically ill and require [[intensive care]].
*Shock phase can develop as fluids start to leak through the damaged [[colon]] lining.
**Results in [[Shock (medical)|shock]] and [[metabolic acidosis]] with [[dehydration]], [[hypotension|low blood pressure]], [[tachycardia|rapid heart rate]], and confusion.  
**Patients who progress to this phase are often critically ill and require [[intensive care]].


==Complications==
==Complications==

Revision as of 14:39, 3 January 2018

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Hamid Qazi, MD, BSc [2] Cafer Zorkun, M.D., Ph.D. [3]

Overview

Ischemic colitis can span a wide spectrum of severity. Majority of patients are treated supportively and recover fully, while a minority with very severe ischemia may develop sepsis and become critically ill. Most patients make a full recovery. Occasionally, after severe ischemia, patients may develop long-term complications such as a stricture or chronic colitis.

Natural History

Three progressive phases of ischemic colitis have been described:[1][2][3][4][5]

  • Hyperactive phase occurs first
    • Primary symptoms are severe abdominal pain and the passage of bloody stools.
    • Many patients get better and do not progress beyond this phase.

Complications

  • About 20% of patients with acute ischemic colitis may develop a long-term complication known as chronic ischemic colitis.[6] Symptoms can include recurrent infections, bloody diarrhea, weight loss, and chronic abdominal pain. Chronic ischemic colitis is often treated with surgical removal of the chronically diseased portion of the bowel.
  • A colonic stricture is a band of scar tissue which forms as a result of the ischemic injury and narrows the lumen of the colon. Strictures are often treated observantly; they may heal spontaneously over 12-24 months. If a bowel obstruction develops as a result of the stricture, surgical resection is the usual treatment,[7] although endoscopic dilatation and stenting have also been employed.[8][9]

Prognosis

  • Majority of patients with ischemic colitis recovery fully, although the prognosis depends on the severity of the ischemia.
  • Patients with pre-existing peripheral vascular disease or ischemia of the ascending (right) colon may be at increased risk for complications or death.
  • Non-gangrenous ischemic colitis, which comprises the majority of cases, is associated with a mortality rate of approximately 6%.[10] However, the minority of patients who develop gangrene as a result of colonic ischemia have a mortality rate of 50-75% with surgical treatment; the mortality rate is almost 100% without surgical intervention.[11]

References

  1. ↑ Medina C, Vilaseca J, Videla S, Fabra R, Armengol-Miro J, Malagelada J (2004). "Outcome of patients with ischemic colitis: review of fifty-three cases". Dis Colon Rectum. 47 (2): 180–4. PMID 15043287.
  2. ↑ Simi M, Pietroletti R, Navarra L, Leardi S (1995). "Bowel stricture due to ischemic colitis: report of three cases requiring surgery". Hepatogastroenterology. 42 (3): 279–81. PMID 7590579.
  3. ↑ Boley, SJ, Brandt, LJ, Veith, FJ. Ischemic disorders of the intestines. Curr Probl Surg 1978; 15:1.
  4. ↑ Hunter G, Guernsey J (1988). "Mesenteric ischemia". Med Clin North Am. 72 (5): 1091–115. PMID 3045452.
  5. ↑ Cappell M (1998). "Intestinal (mesenteric) vasculopathy. II. Ischemic colitis and chronic mesenteric ischemia". Gastroenterol Clin North Am. 27 (4): 827–60, vi. PMID 9890115.
  6. ↑ Cappell M (1998). "Intestinal (mesenteric) vasculopathy. II. Ischemic colitis and chronic mesenteric ischemia". Gastroenterol Clin North Am. 27 (4): 827–60, vi. PMID 9890115.
  7. ↑ Simi M, Pietroletti R, Navarra L, Leardi S (1995). "Bowel stricture due to ischemic colitis: report of three cases requiring surgery". Hepatogastroenterology. 42 (3): 279–81. PMID 7590579.
  8. ↑ Oz M, Forde K (1990). "Endoscopic alternatives in the management of colonic strictures". Surgery. 108 (3): 513–9. PMID 2396196.
  9. ↑ Profili S, Bifulco V, Meloni G, Demelas L, Niolu P, Manzoni M (1996). "self-expandable uncoated metallic prosthesis". Radiol Med (Torino). 91 (5): 665–7. PMID 8693144.
  10. ↑ Longo W, Ballantyne G, Gusberg R (1992). "Ischemic colitis: patterns and prognosis". Dis Colon Rectum. 35 (8): 726–30. PMID 1643995.
  11. ↑ Parish K, Chapman W, Williams L (1991). "Ischemic colitis. An ever-changing spectrum?". Am Surg. 57 (2): 118–21. PMID 1992867.


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