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Gastrointestinal System

Esophagus, stomach, liver, pancreas, intestines, and digestive conditions like GDV, pancreatitis, and enteritis. Explore all 51 verified terms affecting this biological organ system.

Pancreatitis

condition

Inflammation of the pancreas that occurs when digestive enzymes activate prematurely inside the gland itself.

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Gastric Dilatation-Volvulus (GDV / Bloat)

condition

A catastrophic medical and surgical emergency where the stomach fills with gas and twists on its mesenteric axis, cutting off blood supply.

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Canine Parvovirus (Parvo)

condition

A highly contagious and severe viral illness in puppies and unvaccinated dogs that attacks rapidly dividing cells in the intestinal crypts and bone marrow.

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Periodontal Disease

condition

A progressive bacterial infection and inflammation of the supporting tissues of the teeth, leading to bone loss and tooth mobility.

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Feline Infectious Peritonitis (FIP)

condition

A severe, immune-mediated viral disease in cats caused by a mutation of common feline coronavirus (FCoV).

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Leptospirosis

condition

A serious, zoonotic bacterial infection transmitted through contaminated water or wildlife urine that causes acute kidney failure and liver damage.

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Giardiasis (Giardia Parasite Infection)

condition

A microscopic flagellated protozoan intestinal infection causing malabsorptive soft stool, mucus diarrhea, and weight loss.

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Icterus (Jaundice)

symptom

A yellow discoloration of the skin, sclera (whites of the eyes), gums, and mucous membranes caused by high levels of bilirubin in the blood.

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Regurgitation

symptom

The passive, effortless expulsion of food or fluid from the esophagus or stomach without nausea or abdominal retching.

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Vomiting

symptom

The active, coordinated muscular ejection of stomach and upper intestinal contents through the mouth preceded by nausea and abdominal contractions.

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Melena

symptom

The passage of dark, black, sticky, tar-like feces containing digested blood originating from the upper gastrointestinal tract.

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Hematochezia

symptom

The passage of fresh, bright red blood in or on the stool, originating from the lower gastrointestinal tract (colon, rectum, or anus).

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Lethargy

symptom

An abnormal state of drowsiness, sluggishness, low energy, and reluctance to engage in normal physical activity.

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Anorexia (Inappetence)

symptom

The complete lack or loss of appetite and refusal to consume food.

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Ascites (Abdominal Effusion / Fluid in Belly)

symptom

The abnormal pathologic accumulation of free fluid within the peritoneal cavity, causing abdominal distension.

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Tenesmus (Straining to Defecate / Pass Stool)

symptom

Incessant, painful, or ineffectual straining to defecate, typically caused by colonic or rectal irritation.

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Halitosis (Severe Bad Breath / Oral Malodor)

symptom

An offensive, foul, or abnormal odor emanating from the oral cavity, typically caused by periodontal disease, oral necrosis, or systemic metabolic illness.

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Maropitant (Cerenia)

medication

A neurokinin-1 (NK1) receptor antagonist antiemetic used to prevent and treat vomiting and motion sickness.

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Metronidazole (Flagyl)

medication

A synthetic nitroimidazole antibiotic and antiprotozoal medication with anti-inflammatory bowel properties.

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Omeprazole (Prilosec / Gastrogard)

medication

A potent proton pump inhibitor (PPI) that suppresses gastric acid secretion to treat and prevent stomach ulcers and acid reflux.

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Famotidine (Pepcid)

medication

An H2-receptor antagonist that reduces gastric acid secretion to soothe stomach upset, ulcers, and acid reflux.

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Enrofloxacin (Baytril)

medication

A potent bactericidal fluoroquinolone antibiotic targeting bacterial DNA gyrase, used for severe Gram-negative infections.

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Mirtazapine (Mirataz / Remeron)

medication

A tetracyclic antidepressant that antagonizes central presynaptic alpha-2 and serotonin receptors, used as a powerful appetite stimulant.

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Ondansetron (Zofran)

medication

A potent 5-HT3 receptor antagonist antiemetic that blocks peripheral and central serotonin nausea triggers.

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Serum Chemistry Profile (Chem Panel)

diagnostic

A panel of blood biochemical tests that evaluates organ function, electrolytes, blood sugar, and metabolic status.

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Radiograph (X-Ray)

diagnostic

A non-invasive diagnostic imaging modality using ionizing radiation to produce two-dimensional shadow projections of internal bones, lungs, and organs.

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Abdominal Ultrasound

diagnostic

A real-time, non-invasive imaging modality using high-frequency sound waves to visualize internal soft tissue organ architecture and fluid.

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Alanine Aminotransferase (ALT)

diagnostic

A liver enzyme found inside liver cells that leaks into the bloodstream when hepatocytes are damaged or inflamed.

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Blood Urea Nitrogen (BUN)

diagnostic

A metabolic waste product of dietary protein digestion and liver metabolism, excreted primarily by the kidneys.

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Alkaline Phosphatase (ALP)

diagnostic

An inducible enzyme found on the biliary membranes of the liver, bone cells, and (in dogs) induced by steroid hormones.

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Spec cPL / SNAP cPL (Canine Pancreatic Lipase)

diagnostic

A highly sensitive and specific immunoassay measuring canine pancreatic-specific lipase to diagnose or rule out acute pancreatitis.

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Fecal Flotation with Centrifugation

diagnostic

A microscopic parasitological test utilizing high-density flotation solutions and centrifugal force to concentrate and identify intestinal parasite eggs and cysts.

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Serum Bile Acids (Pre- & Post-Prandial Tolerance Test)

diagnostic

A dynamic paired liver function test measuring serum bile acid concentrations before and 2 hours after a meal to evaluate hepatic vascular and parenchymal integrity.

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Gastropexy

procedure

A surgical procedure that permanently attaches the stomach to the abdominal body wall to prevent gastric dilatation-volvulus (GDV / bloat).

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Dental Prophylaxis (Professional Dental Cleaning & Scaling)

procedure

A comprehensive medical procedure performed under general anesthesia to scale plaque and calculus above and below the gumline, polish tooth surfaces, and take dental radiographs.

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Abdominocentesis (Belly Tap / Peritoneal Fluid Drainage)

procedure

A diagnostic or therapeutic puncture of the abdominal wall using a needle or catheter to aspirate free peritoneal fluid.

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Gastrointestinal Endoscopy (Upper GI Scope)

procedure

A minimally invasive diagnostic and therapeutic procedure using a flexible video endoscope to visualize the esophagus, stomach, and duodenum.

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Ultrasound-Guided Fine Needle Aspirate (US-FNA)

procedure

A minimally invasive diagnostic sampling procedure using real-time ultrasound guidance to direct a fine needle into deep internal organs or masses to harvest cells for cytology.

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Pancreas

anatomy

A delicate, V-shaped organ nestled along the stomach and duodenum that has both digestive enzyme (exocrine) and hormone (endocrine) functions.

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Liver (Hepatic Organ)

anatomy

The largest internal metabolic and detoxifying organ in the body, positioned cranial to the stomach behind the diaphragm.

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Esophagus (Gullet)

anatomy

The muscular tube conveying food and liquids from the pharynx down to the stomach via coordinated peristaltic contractions.

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BID (Twice Daily)

abbreviation

A prescription abbreviation originating from Latin meaning "bis in die," directing a medication to be given twice a day, approximately 12 hours apart.

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TID (Three Times Daily)

abbreviation

A prescription abbreviation from Latin "ter in die," directing a medication to be administered three times a day, roughly every 8 hours.

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SID (Once Daily)

abbreviation

A veterinary prescription abbreviation from Latin "semel in die," directing a medication to be given once a day, every 24 hours.

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PO (By Mouth / Oral)

abbreviation

A medical route abbreviation from Latin "per os," meaning that a medication or food must be administered orally by mouth.

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NPO (Nothing by Mouth)

abbreviation

A medical directive from Latin "nil per os," meaning nothing should be given by mouth (no food, treats, or water) for a specified period.

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WNL (Within Normal Limits)

abbreviation

A clinical medical chart abbreviation indicating that an anatomical structure, organ system, or laboratory test value falls completely within expected healthy parameters.

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ADR ("Ain’t Doing Right")

abbreviation

An informal yet universally recognized veterinary clinical shorthand for "Ain’t Doing Right," denoting vague, non-specific malaise or illness without localized signs.

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QID (Four Times Daily)

abbreviation

A prescription abbreviation from Latin "quater in die," directing a medication to be administered four times a day, approximately every 6 hours.

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PRN (As Needed)

abbreviation

A prescription abbreviation from Latin "pro re nata," directing a medication to be administered only as needed or as circumstances arise.

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SOAP (Medical Record Note)

abbreviation

The universal four-part clinical documentation structure used by veterinarians: Subjective, Objective, Assessment, and Plan.

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