Abdominal Flashcards
GORD
Reflux of gastric contents causing mucosal damage and weakened muscles
Prevalence of GORD
15% in adults
Common in infancy but will resolve in 12-18 months
Lifestyle risk factors of GORD
Obesity, smoking, alcohol, coffee, fatty food
Symptoms of GORD
Heartburn Acid regurgitation, unpleasant taste in back of throat Dysphagia Oesophagitis Ulceration Bloating and Belching Bad breath Waterbrash/ Acidbrash (excess salivation) Association with asthma.
Differential Diagnosis of GORD
Oesophagitis, Infection, Duodenal ulcer, gastric ulcers, Heart pain
Investigations of GORD
- Upper GI endoscopy: if oescophagitis or Barrett’s syndrome present the GORD confirmed
- Intraluminal monitoring: 24 hour pH monitoring
Management of GORD: Lifestyle choices
- Encourage weight loss, smoking cessation, raise bed head, small regular meals
- Avoid alcohol, eating before bed
Drugs to avoid in GORD
- those that slow motility: nitrates, anticholinergics, TCA
- Those that damage mucosa: NSAIDS, bisphosphonates
Drugs to treat GORD
- Alginate containing antacids e.g. gaviscon
- H2-receptor anatgonist (reduced acid production by cells) e.g. cimetidine
- PPI e.g. omeprazole, lansoprazole
- Prokinetic agents e.g. metocloperamide
Surgery for GORD
Laparoscopic Nissen Fundoplication (LNF) - surgery tightening the ring of muscle at the bottom of the oesophagus to stop acid leaking from stomach
Complications of GORD
Ulcers, Peptic stricture, Barrett’s oesophagus, Oesophagitis
Side effects of H2 receptor antagonists
Diarrhoea, headaches, rash and tiredness
Pathology of Barrett’s oesophagus
Squamous mucosa replaced by columnar mucosa
Peptic Ulcer
Breach in the mucosal lining of the stomach or duodenum
Where are gastric and duodenal ulcers most common?
Gastric ulcer- lesser curvature of the stomach
Duodenal ulcer- duodenal ampulla
Define Dyspepsia
Indigestion with pain or discomfort in the upper abdomen
Prevalence of DU and GU
Du affects 10-15% of adults and are 4x more common than GU
Who is affected in Peptic Ulcers
Common in elderly, common in females, prevalent in developing countries due to high H. Pylori infection rates
Zollinger-Ellison Syndrome
Disease in which tumours cause the stomach to produce too much acid, resulting in peptic ulcers.
What causes Zollinger-Ellison Syndrome
Gastronima, a tumour that secretes a hormone called gastrin stimulating release of gastric acid
Causes and risk factors of Peptic Ulcers
H.pylori NSAIDs, steroids, SSRIs Smoking Stress Delayed gastric emptying in GU Increased gastric emptying in PU
Which blood group is most at risk of duodenal ulcers?
O
what percentage of DU and GU does H.pylori cause?
95% of DU
80% of GU
Symptoms of peptic ulcers
Epigastric pain, N&V, bloating, weight loss, burping, reflux, back pain (suggest posterior ulcer)
What mnemonic is used for the Peptic ulcer symptoms
ALARM
- Anaemia
- Loss of Weight
- Anorexia
- Recent onset/ Progressive symptoms
- Meleana/ haematemesis
where does dark, tarry stools suggest bleeding comes from?
Bleeding in the upper part of GI tract. Blood is darker as it has been digested through the tract.
Differential diagnosis of Peptic Ulcer
Gastritis, GORD, pancreatitis, cholecystitis (gallstones) hepatitis, IBD, AAA, MI
Cholecystitis
Inflammation of the gallbladder due to blockage by gallstones
Cholangitis
Inflammation of the bile duct caused by bacteria ascending from the junction with the duodenum
Investigations for peptic ulcer
- FBC blood test
- H. Pylori testing
- Urea Breath Test
- Stool antigen test
- Serology to detect IgG antibodies
- Rapid urease test (CLO)
- Endoscopy
Rapid Urease Test (aka Campylobacter-like organism test)
Fast test for diagnosing H.Pylori. If present, H.Pylori secretes urease which converts urea to ammonia
Management for Peptic Ulcers
Smoking cessation, decrease alcohol intake, reduce stress, stop NSAIDs
Recurrence rate of H. pylori after eradication
10-20%
What does H. Pylori Eradication Triple Therapy Involve?
2 Antibiotics and 1 PPI
Antibiotics against H.Pylori in Triple Therapy
Amoxicillin, Clarithromycin, Metronidazole
PPI used in Triple Therapy
Esomeprazole, Lansoprazole, Omeprazole, Pantoprazole, Rabeprazole
Complications of Peptic Ulcers
Haemorrhage
Perforation of Ulcer
Malignancy
Gastric outflow obstruction
Perforated Viscus
Loss of gastrointestinal wall integrity with subsequent leakage of enteric contents.
Commonest cause of Acute Upper GI bleeds
Peptic Ulcers (gastric and duodenal) and Oesopha-gastric varices
Mallory-Weiss syndrome
Bleeding from a tear in the lining of the oesophagus due to prolonged vomiting and increased intra-abdominal pressure
Risk Factors to Acute Upper GI bleeds
Alcohol abuse, chronic liver disease, NSAID
Symptoms for Actue Upper GI bleeds
Haematemesis, Malaena, PR bleeding, Nausea
Signs/ Examination of Acute Upper GI bleeds
Cold, clammy, capillary refill <2, hypotensive, tachycardic
What is the Rockall Score?
A scoring system used to identify patients at risk of adverse outcome following acute upper GI bleed. Criteria uses increasing age, co-morbidity, shock and endoscopic finding.
What is the Glasgow-Blatchford bleeding Score?
The GBS helps identify which patients with UGIB can be safely discharged from the emergency room.
Managing UGIB
- Blood volume: transfuse red cells
- Endoscopy
- Drug therapy: PPI- Omeprazole, prokinetics- erythromycin
- Surgery if persistent
Budd–Chiari syndrome
Occlusion of the hepatic veins that drain the liver. It presents with the classical triad of abdominal pain, ascites, and liver enlargement.
Acute lower GI bleeds
Occurring from the colon, rectum or anus. Presenting as hematochezia or meleana.
Hematochezia
Bright red blood, clots or burgundy stools. Suggest bleeding from lower GI
Meleana
Dark sticky stools cwith digested blood. Suggest bleeding from upper GI
Causes of LGIB
Diverticulitis, Ischaemic colitis, Crohns, Haemorrhoids, Anal fissure
Investigations for LGIB
- Proctoscopy
- Flexible sigmoidoscopy or colonoscooy
- Angiography
Proctoscopy
Uses a proctoscope to examine the anal cavity, rectum, or sigmoid colon.
Inflammatory Bowel Disease
Inflammatory, idiopathic, autoimmune conditions of the colon and GI tract
Main IBD
UC and Crohns• Collagenous colitis, lymphocytic collitis, ischaemic collitis, diversion collitis and Behçet’s syndrome
Behcet’s syndrome
Causes blood vessels to be inflammed throughout the body. Symptoms include mouth sores, eye inflammation, skin rashes and genital sores
Location of UC and Crohn’s
UC affects the large intestines
Crohns affects any part of tract from the mouth to the anus
Prevalence of UC and Crohn’s
UC: 2/1000 in UK
CD: 1/1000 in UK
Who is affected by UC and Crohn’s
15-40 y.o
Affects males and females equally
Affected by race and ethnic origin
UC more common in non-smokers. CD more common in smokers.
Crohn’s disease
Skip lesions, deep ulcers, cobblestone appearance, granulomas, Transmural, strictures common, Crypst abscesses uncommon, Goblet cells present
Ulcerative Collitis
Rectum always involved, Continuous, mucosa is inflamed, superficial, no granulomas, stictures uncommon, Crypt abscesses common, goblet cells depressed
Symptoms for IBD
diarrhoea with blood in UC, steatorrhoea in CD, abdominal pain, malaise, lethargy, anorexia, weight loss, aphthous ulcers, tenesmus, urgency, N&V in CD
Tenesmus
Continuous inclination to open the bowels
Canker sore or Apthous ulcers
Small lesions that develop in your mouth or on gums. Unlike cold sores, they are not found on the lips and not contagious.
Proctitis
UC affecting the colon only
Pancolitis
UC affecting the whole colon
Erythema Nodosum
Swollen fat under the skin causing red bumps and patches
Pyoderma gangrenosum
Large painful ulcers on the skin mainly legs. Autoimmune disease associated with UC and CD
Differentials for IBD
IBS, Infective colitis, Coeliac Disease, Diverticulitis
Investigations for IBD
- Bloods: FBC, b12, folate, ESR, CRP, blood culture
- Stools
- Abdo X-ray
- Barium enema
- Colonoscopy
- Rectal biopsy
- MRI
- Staging
Crohn’s Disease Activity Index (CDAI)
Tool used to quantify the symptoms of patients with Crohn’s disease. Helps to identify response or remission of disease
Trulove and Witts’ Severity Index
Measures the severity of UC. Classified as mild, moderate or severe
Treatment of Crohns
- Stop Smoking
- Glucocorticoids- Prednisolone
- Infliximab
- Surgery- panproctocolectomy and end-ileostomy
Treatment of UC
- Aminosalicylate - mesalazine
- Azathioprine for moderate to severe
- Surgery
Complications of IBD
Strictures, fistulae, perforation, haemorrhage, colorectal cancer, toxic megacolon, anaemia, osteoporosis due to steroid therapy
Irritable bowel Syndrome and the different types
A functional bowel disorder.
- IBS-D (Diarrhoea predominated)
- IBS-C (Constipation)
- IBS-A (Alternating stool pattern)
- IBS- PI (Post-infective)
How common is IBS
- Affects 1 in 5 people
- Most common functional gastrointestinal disorder (FGID)
- Females 2x more likely than men
- Teens to 40s
Cause of IBS
Unknown. Result of the disruption in communication between the brain and gut
Risk Factors for IBS
Depression, hypochondriac, being female
Symptoms for IBS
Pain and cramping, diarrhoea, constipation, changes in bowel movements, bloating, tenesmus
Differentials for IBS
IBD, Coeliac Disease, Gastroenteritis, Colorectal carcinoma
Manning Criteria
Helps in diagnosis of IBS. Minimum of 2.
- Relief of abdominal pain with defecation
- Bloating or abdominal distention
- Looser stool with the onset of abdominal pain
- Feeling of incomplete evacuation of stool
- More frequent bowel movements with the onset of pain
- Passage of mucus from the rectum
Rome II Criteria
Used to diagnose functional bowel disorder. For IBS, at least 12 weeks preceding the abdominal discomfort with 2 of the 3 features:
- Relieved with defecation
- Change in frequency of stool
- Change in appearance of stool
Treating IBS
- Avoid food that trigger symptoms
- Adjust fibre in diet
- Exercise regularly
- Reduce stress levels
Antidiarrhoeal drugs for bowel frequency
Loperamide, codeine, co-phenotrope
Smooth muscle relaxants for pain
Mebeverine, hydrochloride, dicycloverine, hydrochloride, peppermint oil
Infective Gastroenteritis
Infection of the stomach and GI tract due to bacterial or viral infection, causing vomiting and diarrhoea.
Risk factor for Infective Gastroenteritis
Young children and older Aldults
Travellers to developing countries
Homosexual men
Causes of Infective Gastroenteritis
- Viral causes common in children
- Bacterial causes common in adults
- Parasitic: protozoa esp giardia lambia, entamoeba histolytica, cryptosporidium
Mechanisms of Infective Gastroenteritis
- Mucosal adherence
- Mucosal invasion where bacteria penetrates lining
- Toxin Production: Enterotoxins and cytotoxins