L5+6 Fecal Flashcards
Physiology of faecal elimination
Large intestine
Rectum…
Large intestine
1.Absorb water and nutrient
2.Fecal eliminate
Rectum+canal
1.Internal muscle—) involuntary muscle
2.External muscle—) voluntary muscle
3.Defecation—) expulse feces from rectum
External sphincter relax—) expulsion of faeces( contraction of abdominal muscle)
Faeces physiology
1.Soft but formed (75% water)
2. Brown colour due to bilirubin
3.microorganism’s action in faeces leads to odour
4.normally fart 13-21/day
Adult faeces normal abnormal
Adult
1.colour brown vs clay or white
2. Consistency formed, soft, moist vs hard & dry
3.shape cylindrical vs narrow, pen shape
4.amount 100-400g
5. Aromatic: depends on food vs pungent(勁)
Factors affecting defecation
1.development
2.Activity
3.Diet
4.fluid intake/ output
5.psychological factors
6.daefecation habit
7. Medication
8.diagnostic procedures
9.surgery
10.pathologic conditions
11.pain
Development of faeces
Infant:
1.Meconium: first stool after born <24h
Transition stool: after a week— greenish yellow
2.Immature intestine: cannot well absorb water: watery stool, soft and liquid
3.Breast feed: light yellow to golden feces
Formula: dark yellow to yellow green feces
Less frequent and dryer after intestine mature
4.control of daefecation starts at 1.5-2
5. 17% older adult suffer from constipation
Activity factors affect daefecation
1.activity stimulate peristalsis
2.weak abdominal and pelvic muscle are often ineffective in defecation
Diet affecting daefecation
1.insoluble fibre promotes movement of faeces thru digestive system.
2.drink enough water as fibre work best with water
3. Regular diet helps in regulating peristalsis action in colon
4. Spicy food can produce Diarrhea and flatus
5.constipation-food: egg, pizza, lean meat
6.laxative food: sugar, chocolate, alcohol
7.hard feces with less water intake or excessive output
8.move too quick=watery
Psychological factors
Anxious or angry: diarrhea
Depress: contipation
Defecation habit related defecation
1.Early bowel training can establish the habit of defecating at a regular time.
2.person ignore urge to defecate—) water continue to dry up—) dry stool
3. Reflex to shit is weaken when keep ignore
Medication related to shit
Drugs cause constipation: morphine, codeine
Drugs cause diarrhea
Laxatives: stimulate bowel
Lomotil: suppress peristalic activity
D rug cause GI bleeding will cause red stool, black
Surgery
Surgery related to GI tract can cause stopped bowel movement which last 24-48hr
Pathological
1.Spinal cord & brain injury can decrease stimulation of defecation
2.impaired mobility may decrease the urge of defecation—) constipation
Pain
Feeling of pain( hemorrhoid injury) will suppress shit
Constipation
Cause of defecation
Headache
Anorexia, nausea
Abdominal pain, cramp
Decreased defecation
Hard dry stool
Painful defecation
Cause:
1.insuffcient fluid intake
2.insufficient fibre intake
3.insufficient activity/ mobility
4.irregular defecation habit
5.ignoring urge to defecate
6.lack of privacy
7.depression
Fecal impaction(積屎)
factors
Treatment
Too much hard shit
Abdominal distend
Anorexia, nausea, vomiting
Treatment
Oil retension enema
Suppositories
Manual removal
Diarrhea
Fatigue, weakness
Hard or impossible to control the urge of defecation
Spasmodic cramp
Increase bowel sound
Unformed stool or liquid