Exam 4 - Constipation Flashcards
Parts of the small intestine
Duodenum
Jejunum
Ileum
What does the small intestine do?
Breaks down food
Absorbs nutrients
Extracts water
Moves food along GI tract
Duodenum
First part of the small intestine
What feeds into the duodenum?
Stomach
Liver
Gallbladder
Pancreas
(Silly Little Gay People)
Chemical digestion
Occurs due to liver, gallbladder, and pancreas sending digestive juices into the duodenum
Jejunum
Middle (second) part of the small intestine
What is the jejunum made up of?
Many coils that contain many blood vessels
What happens in the jejunum?
Muscles churn food back and forth so it mixes with digestive juices
(This just sounds like it would happen in the middle)
Peristalsis
Keeps the food moving forward in the jejunum
Ileum
- Last and longest section of the SI
- Walls start to thin and become more narrow
- Reduced blood flow
Where does food spend a majority of digestive time?
In the ileum
Where is the most water and nutrients absorbed?
In the ileum
How long does ingested food stay in the stomach?
For about 3 hours
After being in the stomach, where does the ingested food go?
It moves to the SI for about 3 hrs
Peristaltic waves
Moves the partially digested food from the SI toward the duodenum
Partially digested food is moved by contractions from the small intestine to the _____
Large intestine
What is defecation controlled by?
Both voluntary and involuntary reflexes
Where is fecal matter stored
In the sigmoid colon until defecation
What can constipation stem from
Primary or secondary mechanisms
Secondary constipation
Systemic, neurologic, and psychological disorders and/or structural abnormalities
Primary constipation
Slower than normal GI transit time or a defamatory disorder (ie pelvic floor disorder)
What factors can contribute to constipation?
Inadequate dietary fiber and fluid intake
Dietary fiber
Dissolves or swells in intestinal fluid causing an increase in fecal bulk to lan in stimulating peristalsis and elimination of stool
Diets low in ______ may be associated w/ decreased bowel movements/constipation
Calories, carbs, or fiber
What does inadequate intake of fluids lead to?
Developing dehydration w/ consequential constipation
How many visits to the hospital are because of constipation?
2.5 million visits per year
Common causes of constipation
Structural issues
Lack of physical exercise
Inadequate fluid intake
Psychological
Some medications
Inadequate fiber intake
Systemic
(SLIPS In Shit)
Clinical descriptions of constipation
- Feeling as though not a complete evacuation
- Passing hard, dry stool
- Straining
- Decreased frequency
- Passing small stools
(Feeling Pretty Shitty, Don’t Push)
Constipation definition
Usually defined as having fewer than 3 bowel movements per week and involves straining/difficult passage of hard, dry stools
*not a set definition because it can look very different for different people
Medications that can cause constipation
Antacids
Anticholinergics
Antihistamines
Calcium supplements
Opioids
(3 antis)
What antacids most commonly cause constipation?
Calcium and aluminum compounds
Bismuth subsalicylate
What anticholinergics most commonly cause constipation?
Bentropine and glycopyrrolate
What antihistamines commonly cause constipation?
Diphenhydramine
Loratadine
Calcium supplements that commonly cause constipation
Calcium carbonate
What can happen if constipation is left untreated?
Hemorrhoids
Rectal prolapse
Anal fissures
Fecal impaction
(Having Rough Ass Fucks)
Psychological issues that cause constipation
Stress
Depression
Eating disorder
Structural issues that cause constipation
Colorectal injury/inflammation
Other structural abnormalities
Pelvic floor disorders
(COP)
Systematic causes of constipation
Parkinsonism
Diabetes
MS
Menopause
Dementia
Dehydration
IBS
Thyroid disorders
Dietary fiber
(Please Don’t Make Me Do Drugs In The Dark)
In addition to the typical clinical descriptions, what can be seen in patients who are constipated?
Bloating
Flatulence
Lower back pain
Anorexia
Abdominal discomfort
Lethargy
Dull headache
(Been Feeling Like Ass A Lot [of] Days)
When can constipation be treated w/ self care measures?
When it is occasional and temporary
**continuous constipation lasting over several weeks-months or if it is complicated by other conditions requires sustained and aggressive treatment
Exclusions to self care for constipation
- Blood in stool or dark, tarry stool
- Daily laxative use
- Anorexia
- Chronic medical condition that may preclude
- Recurring bowel symptoms after dietary/lifestyle changes
- Age less than 2
- Nausea/vomiting
- IBS
- Unexplained flatulence
- Marked abdominal pain/dissension/cramping
- Symptoms lasting longer than 2 weeks or recur over 3 months
- Fever
- Unexplained changes in stool
(Big Dumb Ass CRANIUMS Fuck Up)
Different treatment approaches to treat constipation
Lifestyle changes
Pharmacologic interventions
American Dietetic Association fiber recommendations
Adult women: 25 g daily
Adult men: 38 g daily
Fruits and vegetables
Increase stool mass and normalize bowel movements
How long does it take for a high fiber diet to start having an effect?
3-5 days
What can increasing dietary fiber intake cause?
Erratic frequency
Flatulence
Abdominal discomfort
Recommendations for increasing dietary fiber intake
As fiber increases, so should fluid intake
- Eight 8 oz glasses a day
- Pregnant/lactating women need more
How should you go about increasing your dietary fiber intake?
Gradually increasing over a few weeks
Bulk forming fiber laxatives
Methylcellulose (citrucel)
Calcium polycarbophi (fibercon)
Psyllium (metamucil)
What foods are high in fiber?
Oats
Potatoes
Almonds
Weet bix
Peas
Apples
Wholemeal bread
Bananas
Oranges
Broccoli
Corn
Spinach
Strawberries
Quinoa
Lentils
Chickpeas
(Old PAWPAW BOB Can’t See Shit, Quit Looking Close)
Contraindications to dietary fiber
Intestinal obstruction
Abdominal pain
Inadequate fluid intake
Dietary fiber supplements
Inulin (FiberChoice, Metamucil Clear & Natural)
Partially hydrolyzed guar gum (Sunfiber)
Powdered cellulose (Unifiber)
Wheat dextrin (Benefiber)
Systematic adverse drug reactions in bulk forming agents
Abdominal cramping
Flatulence
Dosage forms of bulk forming agents
Powders
Capsules
Gummies
Tablets
Wafers
Chews
(Painful Constipation? Get The Water Can)
Types of pharmacologic interventions for constipation
Bulk forming laxatives
Lubricant laxatives
Emollient laxatives (stool softeners)
Saline laxatives
Stimulant laxatives
Hyperosmotic laxatives
(BLESS Him)
What is the treatment of choice for constipation in most cases?
Bulk forming agents such as Metamucil, FiberCon, and Citrucel
This is because they closely mimic the body’s natural processes
Onset of bulk forming agents
12-24 hours but may take up to 72 hours
What do laxative recommendations depend on?
The underlying cause of constipation and patient preferences
Counseling on bulk forming agents
Must take w/ adequate liquid
Useful in short term constipation relief
Sugar content may be an issue for those w/ diabetes or restricted caloric intake
MOA of bulk forming agents
Absorb water and form emollient gels that stimulate peristalsis
Hyperosmotic agent age restrictions
Only use in 17+
Who can use glycerin
Adults and children
Onset of hyperosmotic agents
12-72 hours but could take up to 96 hours
ADRs for hyperosmotic agents
Bloating
Flatulence
Abdominal discomfort
Cramping
Electrolyte/fluid imbalance
(B FACE)
Exclusions for the use of hyperosmotic agents
Patients w/ renal disease or IBS should be referred
Directions of use for hyperosmotic agents
Take po qd prn
Administration of hyperosmotic agents
17g (one capful/packet) mixed w/ 4-8 oz of water
What is the hyperosmotic agent glycerin used for
Lower bowel evacuation
Dosage forms of glycerin
Solid and liquid suppositories
Onset of glycerin
15-30 min
Dosing of glycerin
One suppository used once or as directed by PCP
Who should avoid using glycerin?
Patients w/ preexisting rectal irritation