NUR 144 - Week 4 - Low GI Flashcards
Small Intestine
Functions
Sections
Function is absorption
Sections:
- Duodenum
- Jejunum
- Ileum
Large Intestine
Ascending-Transverse-Descending-Sigmoid-Rectum
What is the function of the gut microbiome?
- Breakdown waste
- Vitamin synthesis
- Immune function
Colonization begins at birth and is established by the age of 2
What are factors that influence the gut microbiome?
- Age
- Genetics
- Diet
- Personal hygiene, infections
- Vaccinations, medications (antibiotics)
- Chronic disease
What are lab studies in regards to the lower GI system?
- Colonoscopy (#1 test for colon cancer)
- Serum lab studies
- Stool tests
- Ultrasonography
- Genetic testing
- Imaging studies: CT, PET, MRI, scintigraphy, virtual colonoscopy
- Sigmoidoscopy / colonoscopy
- Lower GI tract study
- GI motility
What is the #1 test for colon cancer?
Colonoscopy
Constipation
What is it?
Causes?
Fewer than three bowel movements weekly; bowel movements that are hard, dry, small, difficult to pass
Cause:
- Most meds
- Chronic laxative use
- Lack of exercise
- Weakness, immobility, fatigue
- Lack on intra-abdominal pressure
- Diet
Constipation
What to assess?
- Fewer than three bowel movements per week
- Hard, dry stools
- Abdominal distention, pain, bloating
- Sense of incomplete evacuation
- Straining at stool
Constipation
What are the complications?
- Decreased cardiac output
- Fecal impaction
- Hemorrhoids (swollen, inflamed blood in anus)
- Fissures (cracks)
- Rectal prolapse (rectum comes out)
- Megacolon (dilated, atonic colon)
Constipation
Diagnostic tests
- Thorough hx and physical examination
- Barium enema
- Sigmoidoscopy, stool testing
Constipation
Management and Teaching
- Correct underlying cause (may require change in pt’s meds)
- Teach normal bowel patterns
- Support legs during bm
- Attempt bm after meals or warm drink
- Increase fiber and fluid
- Exercise + activity (abdominal strength)
- Laxative
Diarrhea
What is it?
Differentiate acute-persistent-chronic
Increased frequency of bowel movements, more than three per day
- Usually associated with urgency, perianal discomfort, incontinence
Can be:
1) Acute: Self-limiting; 1-2 days
- Noninflammatory: large volume, noninvasive enteric pathogens
- Inflammatory: small-volume, pathogens that invade mucosa
2) Persistent: 2-4 weeks (often viral or related to meds)
3) Chronic: more than 4 weeks
- Causes: Parasite, c-diff, chemo, cardiac meds
Diarrhea
What to assess for?
- Increased frequency and fluid content
- Abdominal cramps
- Distention
- Borborygmic
- Anorexia, thirst
- Painful, spastic contraction of anus
- Tenesmus
Diarrhea
Diagnostic test
- CBC
- Serum chemistries
- Urinalysis
- Stool examination
- Endoscopy or barium enema
Diarrhea
Treatment
- Antidiarrheal, antibiotics, probiotics
Diarrhea
Complications
- Fluid / electrolyte imbalances
- Dehydration cardiac dysrhythmias
- Chronic diarrhea = skin care issues r/t irritant dermatitis
Diarrhea
Patient teaching
- Rest
- Diet / fluid intake
- I/O
- Avoid irritating foods: caffeine, carbonated beverages, hot and cold foods
- Perianal skin care
- Avoid: milk, fat, whole grains, fruit, veggies
Fecal incontinence
What is it?
What causes it?
Anal sphincter weakness
Causes:
- Traumatic: ex = surgery
- Nontraumatic: ex = scleroderma
- Neuropathy
- Inflammation
- CNS disorders
- Diarrhea, fecal impaction + overflow
Fecal Incontinence
Assessment
- Minor soiling to complete incontinence
- Occasional urgency
- Loss of control
Fecal Incontinence
Diagnosis
- Hx
- Rectal examination
- Endoscopy
- Radiography
- CT scan
Irritable Bowel Syndrome
What is it?
Causes?
Chronic functional:
- Recurrent abdominal pain, associated with disordered bowel movement
- may include: diarrhea, constipation or both
Cause:
- neuroendocrine dysregulation leads to = altered peristalsis
- Chronic stress
- Sleep deprivation
- Surgery
- Infection
- Diverticulitis
Irritable Bowel Syndrome
What to assess for?
- Alteration in bowel pattersn
- Pain
- Bloating
- Abdominal distention
Irritable Bowel Syndrome
Diagnostic tests
-Rome IV Criteria
- Stool studies
- Contract radiography studies
- Proctoscopy, colonoscopy
- Manometry
Irritable Bowel Syndrome
Teaching
- Mediation management
- Complimentary medicine
- Dietary changes
- Food diary
- Adequate fluid intake
- Avoid alcohol, smoking