K55.0 - Acute Vascular Disorder of Intestine | ICD-10
K55.0 is the ICD-10 code for acute vascular disorders of the intestine, primarily acute mesenteric ischemia, a condition where the intestine is damaged due to insufficient blood supply.
Things worth knowing about "K55.0"
K55.0 is the ICD-10 code for acute vascular disorders of the intestine, primarily acute mesenteric ischemia, a condition where the intestine is damaged due to insufficient blood supply.
What does ICD-10 Code K55.0 mean?
The ICD-10 code K55.0 refers to acute vascular disorders of the intestine. The most clinically significant condition classified under this code is acute mesenteric ischemia, a serious emergency in which the blood supply to the intestine is suddenly and severely reduced. Without adequate blood flow, the intestinal tissue is deprived of oxygen and nutrients, leading to tissue damage or death (intestinal infarction).
Causes
Acute mesenteric ischemia can arise from several underlying mechanisms:
- Arterial occlusion: A blood clot (thrombus) or an embolus lodges in one of the intestinal arteries, most commonly the superior mesenteric artery, blocking blood flow.
- Venous thrombosis: A clot in the mesenteric veins impairs blood drainage, leading to ischemia.
- Non-occlusive mesenteric ischemia (NOMI): Occurs without a direct vessel blockage, typically in patients with severe circulatory failure or low cardiac output, where blood flow to the intestine drops critically.
- Aortic dissection: A tear in the aortic wall can compromise the origins of the intestinal vessels.
Symptoms
Symptoms of acute mesenteric ischemia are often dramatic and require immediate medical attention:
- Sudden, severe abdominal pain (often initially disproportionate to physical examination findings)
- Nausea and vomiting
- Diarrhea, which may be bloody
- Abdominal distension and rigidity in later stages
- Fever and general deterioration
- Signs of peritonitis and circulatory shock in advanced cases
Diagnosis
Timely diagnosis is critical to prevent irreversible bowel damage:
- Laboratory tests: Elevated lactate levels, raised white blood cell count (leukocytosis), elevated C-reactive protein (CRP), and increased D-dimer levels may suggest ischemia.
- CT angiography of the abdomen: The gold standard for identifying vascular occlusions and bowel wall changes.
- Ultrasound: May serve as initial assessment but is less reliable.
- Conventional angiography: Used when endovascular intervention is planned.
- Laparoscopy or laparotomy: Direct visualization of bowel perfusion in unclear cases or during surgical intervention.
Treatment
Acute mesenteric ischemia is a medical emergency requiring immediate intervention:
- Revascularization: Restoring blood flow through catheter-based procedures (e.g., thrombectomy, stenting) or open vascular surgery.
- Anticoagulation: Heparin is administered to prevent further clot formation.
- Surgical resection: Necrotic (dead) segments of bowel must be surgically removed.
- Intensive care management: Hemodynamic stabilization, antibiotics for suspected bacterial translocation or peritonitis.
- Nutritional support: Parenteral (intravenous) nutrition is often required following surgery.
Prognosis
The prognosis for acute mesenteric ischemia remains serious. Despite advances in diagnosis and treatment, mortality rates range from 50 to 80%, depending on the extent of bowel involvement and the time elapsed before treatment. Early recognition and rapid intervention are essential for patient survival.
References
- World Health Organization: ICD-10 International Statistical Classification of Diseases and Related Health Problems, 10th Revision, Volume 1. Geneva: WHO, 2019.
- Acosta S. - Mesenteric ischemia. In: Current Opinion in Critical Care, 2015; 21(2):171-178. PubMed PMID: 25692805.
- Tilsed J.V.T. et al. - ESTES guidelines: acute mesenteric ischaemia. In: European Journal of Trauma and Emergency Surgery, 2016; 42(2):253-270.
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