Gastroenterology, Urology, and Nephrology Emergency Care

Vocabulary practice flashcards covering pathophysiology, assessment, clinical findings, and emergency prehospital management of gastrointestinal, urological, and renal emergencies.

Visceral Pain

Abdominal pain originating in the walls of hollow organs, capsules of solid organs, or the visceral peritoneum caused by inflammation, distention, or ischemia, typically described as vague, dull, poorly localized, or crampy.

Somatic Pain

Sharp abdominal pain that travels along definite neural routes to the spinal column, is localized to a specific region, and is commonly caused by bacterial or chemical irritation.

Referred Pain

Pain that originates in one region of the body but is perceived in another due to shared neural pathways, such as diaphragmatic irritation presenting as pain in the shoulder or neck.

Cullen's Sign

Periumbilical ecchymosis indicating intraperitoneal hemorrhage and significant internal fluid loss.

Grey Turner's Sign

Ecchymosis in the flank regions indicating retroperitoneal hemorrhage or significant internal fluid loss.

Surgical Emergency Rule of Abdominal Pain

Any persistent abdominal pain lasting longer than $6\text{ hours}$ that is classified as a surgical emergency requiring transport and physician evaluation.

Ligament of Treitz

The anatomical landmark dividing the upper gastrointestinal tract from the lower gastrointestinal tract; bleeding proximal to this structure is considered upper GI bleeding.

Hematemesis

The vomiting of blood, which may appear bright red or resemble dark coffee grounds, indicative of upper gastrointestinal bleeding.

Melena

Dark, tarry stool containing digested blood resulting from upper gastrointestinal hemorrhage that has traversed the lower digestive tract.

Esophageal Varices

Swollen, dilated veins in the lower esophagus resulting from portal hypertension—most often secondary to alcoholic liver cirrhosis—carrying a mortality rate exceeding $35\%$ upon rupture.

Octreotide

The pharmacological agent of choice administered for the emergency management of acute esophageal variceal bleeding.

Acute Gastroenteritis

Inflammation of the stomach and intestines characterized by sudden-onset vomiting and diarrhea, causing hemorrhage and erosion of mucosal and submucosal layers that can lead to severe dehydration and hypovolemia.

Chronic Gastroenteritis

Long-term inflammation marked by permanent mucosal changes or damage, primarily caused by microbial infections like Helicobacter pylori or fecal–oral pathogen transmission.

Peptic Ulcer Disease

Erosions in the mucosal lining of the stomach or duodenum caused by gastric acid, frequently associated with NSAID use, alcohol, nicotine, or Helicobacter pylori infection.

Zollinger-Ellison Syndrome

A condition in which an acid-secreting tumor provokes excessive gastric acid production, leading to recurrent peptic ulcerations in the duodenum.

Cyclical Vomiting Syndrome (CVS)

A disorder characterized by recurrent episodes of severe nausea, vomiting, and physical exhaustion that progresses through four distinct stages: prodrome phase, vomiting phase, recovery phase, and well phase.

Ulcerative Colitis

An idiopathic inflammatory bowel disorder primarily involving the rectum or rectosigmoid large intestine, presenting with recurrent bloody diarrhea, mucus in the stool, abdominal cramping, and potential for severe hemorrhage.

Pancolitis

A widespread inflammatory condition occurring when ulcerative colitis extends continuously throughout the entire colon.

Proctitis

Inflammation localized exclusively to the rectum, representing a subtype of ulcerative colitis.

Crohn's Disease

An idiopathic inflammatory bowel disorder that can cause transmural active lesions anywhere along the gastrointestinal tract from the mouth to the rectum, commonly resulting in intestinal obstruction and weight loss.

Diverticulosis

The condition characterized by small outpouchings of mucosal and submucosal tissue (diverticula) herniating through the outer muscular wall of the intestine.

Diverticulitis

Inflammation and infection of intestinal diverticula, classically presenting with left lower quadrant abdominal pain, fever, tenderness, and an elevated white blood cell count.

Hemorrhoids

Small masses of swollen veins located in the rectum (internal) or anus (external) that may thrombose, bleed bright red blood during defecation, or result from increased portal pressure or straining.

Intussusception

A mechanical bowel obstruction occurring when a segment of adjoining bowel telescopes into the lumen of an adjacent intestinal segment.

Volvulus

A mechanical bowel obstruction caused by abnormal twisting or torsion of a loop of bowel around its own mesenteric axis.

Inguinal Hernia

A condition in which a loop of the small bowel protrudes through the abdominal wall into the inguinal canal, posing a risk for intestinal strangulation or obstruction.

Mesenteric Ischemia

A life-threatening reduction or cessation of blood supply to the bowel caused by narrowing or occlusion of the superior or inferior mesenteric artery, resulting in tissue infarction and sepsis.

Appendicitis

Acute inflammation of the vermiform appendix commonly caused by obstruction of the appendiceal lumen by fecal material, recognized as the most common surgical abdominal emergency in the field.

McBurney's Point

An anatomical site located $1\text{ to }2\text{ inches}$ above the anterior iliac crest on a line to the umbilicus, where localized tenderness classically occurs in appendicitis.

Cholecystitis

Inflammation of the gallbladder, caused in $90\%$ of cases by gallstones (cholelithiasis), presenting with acute right upper quadrant pain often following a high-fat meal.

Murphy's Sign

Point tenderness and sudden cessation of inspiration upon palpation beneath the right costal margin, highly indicative of acute cholecystitis.

Pancreatitis

Inflammation of the pancreas caused by autodigestion by pancreatic enzymes, most frequently triggered by chronic alcoholism ($80\%$ of metabolic cases) or biliary tract obstruction by gallstones.

Hepatitis A (HAV)

An infectious viral hepatitis pathogen primarily transmitted through the fecal–oral route or the consumption of contaminated food and water.

Hepatitis B (HBV)

Serum hepatitis transmitted via exposure to infectious bloodborne pathogens or body fluids, preventable through active vaccination.

Hepatitis C (HCV)

A bloodborne viral infection historically associated with blood transfusions that causes chronic, progressive, and debilitating hepatocellular damage.

Hepatitis D (HDV)

A defective viral hepatitis pathogen that remains dormant in the body and requires the presence of active Hepatitis B virus (HBV) to replicate.

Nephrology

The medical specialty devoted non-surgically to the care, diagnosis, and management of kidney disorders.

Urology

The surgical specialty devoted to disorders of the entire male and female urinary systems, as well as the male reproductive tract.

Renal Hilum

The medial notched region of the kidney through which the renal artery, renal vein, nerves, lymphatic vessels, and ureter enter and exit.

Nephron

The microscopic functional unit of the kidney, containing a glomerulus, Bowman's capsule, proximal tubule, loop of Henle, distal tubule, and collecting duct, with approximately $1\text{ million}$ present in each kidney.

Glomerular Filtration Rate (GFR)

The total volume of fluid filtered out of the renal glomerular capillaries into Bowman's capsule per unit of time, normally averaging $180\,\text{L/day}$.

Renin

An enzyme synthesized and secreted by renal juxtaglomerular cells in response to low systemic arterial blood pressure, which initiates the production of angiotensin and aldosterone.

Erythropoietin

A hormone produced primarily ($90\%$) by kidney cells that stimulates the maturation and development of red blood cells in the bone marrow.

Acute Kidney Injury (AKI)

A sudden drop in renal function often occurring over days, characterized by an acute fall in urine output to below $400\text{--}500\,\text{mL/day}$, with an overall mortality of $50\%$.

Oliguria

A pathologically low urine production rate of less than $400\text{--}500\,\text{mL/day}$, commonly seen in acute kidney injury.

Anuria

The complete absence or cessation of urine production ($0\,\text{mL/day}$).

Prerenal AKI

Acute kidney injury caused by hypoperfusion or reduced systemic blood flow prior to the kidney tissue itself, comprising $40\text{ to }80\%$ of acute renal failure cases.

Renal AKI

Acute kidney injury caused by direct damage within the renal parenchyma, including microangiopathy, acute tubular necrosis, or toxic interstitial nephritis.

Postrenal AKI

Acute kidney injury caused by physical obstruction of urinary outflow located distal to the kidneys in the ureters, bladder neck, or urethra.

Chronic Kidney Disease (CKD)

The progressive and irreversible loss of functional nephrons; metabolic instability and end-stage renal disease manifest once approximately $80\%$ of nephrons are destroyed.

Uremia

A clinical syndrome resulting from severe chronic renal failure marked by the accumulation of blood urea nitrogen (BUN), creatinine, and other nitrogenous metabolic waste products in the circulation.

Uremic Frost

A dermatological finding in end-stage chronic renal failure wherein high concentrations of urea in perspiration crystallize on the skin surface upon evaporation.

Hemodialysis

An extracorporeal renal replacement therapy that passes a patient's blood through an artificial kidney machine containing a dialysate and a semipermeable membrane to eliminate metabolic wastes and excess fluid.

Continuous Ambulatory Peritoneal Dialysis (CAPD)

A dialysis procedure that uses the patient's own peritoneal membrane within the abdomen as the semipermeable filter, infusing and removing dialysate via an indwelling catheter.

Renal Calculi

Solid crystal aggregations formed within the kidney's collecting system (nephrolithiasis), which produce intense flank and groin pain upon passing into or obstructing the ureter.

Struvite Stones

A specific type of kidney stone composed of magnesium ammonium phosphate, commonly provoked by chronic urinary tract infections or recurrent catheterization.

Priapism

A painful, prolonged penile erection unrelated to sexual desire or arousal, constituting a urologic emergency often triggered by sickle cell disease, neurological trauma, or specific medications.

Testicular Torsion

The abnormal twisting of the spermatic cord that obstructs the blood supply to the testicle and scrotum, causing sudden, unilateral scrotal pain, testicular elevation, and swelling.

Pyelonephritis

An infectious inflammation of the renal parenchyma and pelvis, commonly caused by ascending enteric bacteria like E. coli, manifesting with fever, flank pain, and systemic toxicity.

Lloyd's Sign

Tenderness elicited by percussion of the lower back over the costovertebral angle (CVA), strongly indicative of pyelonephritis.

Urinary Retention

The acute or chronic inability to completely empty the bladder of urine, often caused by medications or outflow obstruction such as benign prostatic hyperplasia.