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A lower gastrointestinal bleed is defined as bleeding originating distal to the ileocecal valve, which includes the colon, rectum, and anus. [2] LGIB was previously defined as any bleed that occurs distal to the ligament of Treitz, which included the aforementioned parts of the intestine and also included the last 1/4 of the duodenum and the entire area of the jejunum and ileum. [1]
Kidney infarction: CT scan of the abdomen showing partial infarct of the left kidney. Specialty: Nephrology: Symptoms: Abdominal pain, nausea, vomiting, and fever. [1] Complications: Acute kidney injury and chronic kidney disease. [1] Causes: Cardioembolic disease, renal artery injury, and hypercoagulable state. [1] Diagnostic method
Other symptoms may include abdominal pain, shortness of breath, pale skin, or passing out. [1] [9] Sometimes in those with small amounts of bleeding no symptoms may be present. [1] Bleeding is typically divided into two main types: upper gastrointestinal bleeding and lower gastrointestinal bleeding. [2]
Symptoms of ischemic colitis vary depending on the severity of the ischemia. The most common early signs of ischemic colitis include abdominal pain (often left-sided), with mild to moderate amounts of rectal bleeding. [11] The sensitivity of findings among 73 patients were: [12] abdominal pain (78%) lower gastrointestinal tract bleeding (62%)
Retroperitoneal bleeding is an accumulation of blood in the retroperitoneal space. Signs and symptoms may include abdominal or upper leg pain , hematuria , and shock . It can be caused by major trauma or by non-traumatic mechanisms.
Early symptoms include headache, lower back pain, nausea, vomiting, diarrhea, bloody stool, the appearance of spots on the skin, bleeding in the respiratory tract, and renal symptoms such as kidney swelling, excess protein in urine, and blood in urine. During the hypotensive phase, blood pressure lowers due to microvascular leakage.
Decreased urine output or kidney function may be the only observable symptoms caused by a blood clot renal vein. Other less common causes include hypercoagulable state, invasion by renal cell carcinoma, kidney transplantation, Behcet syndrome, antiphospholipid antibody syndrome or blunt trauma to the back or abdomen. [3]
In terms of cause, almost any condition that involves ischemia can lead to renal papillary necrosis. A mnemonic for the causes of renal papillary necrosis is POSTCARDS: pyelonephritis, obstruction of the urogenital tract, sickle cell disease, tuberculosis, cirrhosis of the liver, analgesia/alcohol use disorder, renal vein thrombosis, diabetes mellitus, and systemic vasculitis. [3]