Week 4 - GIT and Hepatic Nursing Flashcards
Most common causes of an upper GI bleed:
- Peptic ulcer disease
- Erosive gastritis
- Esophageal varices
- Mallory-weiss syndrome
Most common causes of lower GI bleed:
- Diverticulitis
- Vascular ectasias
- Ischaemic colitis
- Infectious colitis
- Inflammatory bowel disease
What is gastroesophageal reflux disease (GORD)?
A chronic digestive disease which occurs when stomach contents move up into the oesophagus (reflux)
What is the most common GIT disorder?
GORD
Risk factors of GORD:
- Obesity
- Male gender
- Smoking
- High alcohol intake
- Age
- Patients who are nursed in a supine position for long periods
- Some surgeries can result in GORD (gastric bypass, gastric sleeve)
GORD complications:
- Oesophagitis
- Barrett’s Oesophagus
- Oesophagus strictures from the build up of scar tissue in the oesophagus
How is GORD caused in infants?
Oesophageal sphincter, immaturity and fluid diet
What medications are used to manage GORD in children?
- Proton pump inhibitors
- H2 antagonists
- Occasionally antacids
GORD pathophysiology:
Defective LOS → transient LOS relaxation → excessive acid exposure in the lower oesophagus → symptoms such as heartburn and regurgitation = reflux
Clinical manifestations of GORD:
- Heartburn
- Regurgitation
- Painful swallowing
- Haematesis
How is the diagnosis made for GORD?
Diagnosis is made when symptoms of heartburn and regurgitation consistently occur more than twice in one week
The main aim of treatment of GORD is to:
- Prevent recurrences of symptoms
- Relieve symptoms
- Reduce the risk of complications and resolve complications such as mucosal lesions in the oesophagus
- Improve quality of life
GORD nursing assessments:
- Primary: ABCD
- Secondary: general appearance, full set of vital signs and hydration assessment
- Focused: abdominal assessment
What symptoms of a patient with GORD would require a gastroscopy to be performed?
- Recurrent vomiting
- Dysphagia
- Unexplained weight loss
- Evidence of gastrointestinal blood loss
Protein Pump Inhibitors action:
- PPIs interfere with the release of hydrogen ions (H+) from the parietal cells in the stomach to decrease the secretion of gastric acid
- Have a short half life but a long duration of action
- Require an acidic environment to be active
Protein Pump Inhibitors indication:
Treatment of GORD and oesophagitis - most effective drug for suppressing the reflux of acidic gastric contents
Protein Pump Inhibitors side effects:
- Dry mouth
- GIT effects (diarrhoea, abdo pain, nausea, vomiting)
- CNS effects (dizziness, headache)
- Respiratory effects (cough, nasal congestion)
What are peptic ulcers?
Erosion of the mucosal lining of the stomach or duodenum leading to a break or ulcer
Peptic ulcer risk factors:
- Regular use of NSAIDs
- Infection of the gastric mucosa
- Smoking
- Advancing age
- High alcohol/caffeine consumption
Peptic ulcer complications:
- Haemorrhage from perforated ulcers → large perforations may be life threatening and require immediate surgical closure
- Constipation → occurs due to dehydration and decreased diet intake secondary to anorexia
Peptic ulcer pathophysiology:
Alteration and breakdown in the cellular structure of the stomach’s protective mucosal layer → submucosal layer becomes exposed to acidic gastric secretions → development of an open lesion → secretions then penetrate to deeper tissue → damaged mucosa triggers histamine release as part of inflammatory response → further stimulation of acid production → damage to small vessels → haemorrhage
Where can peptic ulcers develop?
The ulcers can develop anywhere along the upper digestive tract, from the lower oesophagus, stomach & duodenum
How can peptic ulcers be diagnosed?
- Clinical manifestations
- Abdominal x-ray with barium study = will show depth of ulcer crater
- Gastroscopy = performed to visualise the gastric mucosa, H.pylori can be tested for during the procedure and a biopsy can also be performed
- Breath test = performed to determine if H.pylori is detected
- Blood test = full blood count is used to detect anaemia secondary to bleeding from the ulcer
- Faecal occult test = used to detect the presence of blood in faeces
Treatment of peptic ulcer can include:
- Antisecretory therapy
- Triple therapy for H.pylori infection
- Endoscopy / gastroscopy
- Breath testing
- First line treatment is lifestyle modifications and medications
What does triple therapy consist of?
(Proton pump inhibitor, clarithromycin and amoxicillin or an imidazole)
Peptic ulcer nursing assessments:
- Primary: ABCD
- Secondary: general appearance, full set of vital signs and hydration assessment
- Focused: abdominal assessment
Peptic ulcer clinical manifestations:
- Intermittent epigastric pain
- Feeling of fullness or abdo bloating
- Heartburn
- Nausea/vomiting
Histamine 2 (H2) Receptor Antagonists (H2 Blockers) actions:
Inhibit the action of histamine and the histamine-2 receptor sites on the parietal cells in the stomach, this blocking leads to a reduction in gastric acid secretion and reduction in overall pepsin production, which gives acid sensitive ulcers an opportunity to heal
Histamine 2 (H2) Receptor Antagonists (H2 Blockers) indications:
- Short-term treatment of active peptic ulcers
- Treatment of recurrent peptic ulcers
- Prophylaxis of stress-induced ulcers and acute upper GIT bleeding in critically ill people
Histamine 2 (H2) Receptor Antagonists (H2 Blockers) side effects:
- Headache
- Diarrhoea, weight loss
- Rash, hives,
- Drowsiness/dizziness
Antacid actions:
- Contains a jelly-like ingredient which floats on top of the stomach contents to form a barrier, preventing the contents of the stomach from entering the oesophagus
- Neutralises the hydrochloric acid secreted by the stomach to provide relief from symptoms associated with hyperacidity
Antacid precautions:
- Constipation
- Diarrhoea
- Renal failure
Antacid side effects:
- Abdominal distension
- Constipation
- Diarrhoea
Antacid indications:
- Symptomatic relief only of GIT disorders such as GORD and peptic ulcers
- Recommended across the lifespan from infants to the elderly
- Purchased over the counter (OTC)
What are the two types of Inflammatory Bowel Disease?
Ulcerative colitis and Crohn’s disease
Is bleeding more common in ulcerative colitis or crohn’s?
Ulcerative Colitis
Where is the location of inflammation in Ulcerative Colitis?
Limited to the large intestine/colon
Where is the location of inflammation in Crohn’s?
Anywhere in the GI tract
Signs and symptoms of inflammatory bowel disease:
- Diarrhoea
- Rectal bleeding
- Abdominal pain
- Fever
- Weight loss
- Vomiting
- Cramps
- Muscle spasms
Difference between ulcerative colitis and crohn’s disease
Crohn’s disease causes inflammation of the full thickness of the bowel wall, in any part of the digestive tract from the mouth to the anus. Ulcerative colitis is inflammation of the inner lining of the large bowel (colon and rectum).
What is ulcerative colitis?
Painful swelling, inflammation and ulceration of the mucosa of the large colon
Risk factors of ulcerative colitis:
- Family history
- Age - onset before the age of 30
- Infections - viruses
- Past bowel treatments such as radiation
- Smoking
Ulcerative colitis complications:
- Systemic inflammation - joints, skin, liver
- Adverse effects of long term medication use such as steroids
- Osteoporosis
Pathophysiology of ulcerative colitis:
Cellular changes of the mucosal lining → inflammation of the mucosal lining → oedema and thickening of the muscularis mucosa → small erosions develop on the mucosal lining → erosion form into ulcers and abscesses → leads to further inflammation, infection and development of pus → can result in necrosis of the muscularis mucosa cells (cellular death) → ragged ulceration develops → narrowing of the intestinal lumen → loss of absorptive mucosal surface and mucosal destruction → rapid colonic time, bleeding, cramping, pain, urge to defecate, frequent copious watery diarrhoea, passage of small amount of blood and purulent mucus.
Clinical manifestations of ulcerative colitis:
- Moderate to severe abdominal pain / cramps
- Bloody diarrhoea - often explosive
- Mucous in the faeces
- Fatigue