Ch 4 MDT Flashcards
Diarrhea
How many Bowel movements a day for dx?
3
Diarrhea can be diagnosed as:
Acute or Chronic
Diarrhea acute in onset and persisting for less than 2 weeks is most commonly caused by:
Infectious agents
Bacterial toxins (either produced in the gut)
Infectious sources can be transmitted by fecal-oral contact, food and water and usually have incubation periods between:
12 and 72 hours
Percentage of all water absorbed in the GI tract takes place in the small intestine
> 90%
What is the major site of water resorption?
Jejunum
Colon absorbs additional fluid, transforming a relatively liquid fecal stream in the cecum to a well-formed solid stool in the:
Rectosigmoid
Disorders of the small intestine result in increased amounts of diarrheal fluid with a greater loss of:
Water
Electrolytes
Nutrients
Infectious agents are the most common causes of:
Acute gastroenteritis
Diarrheal disease (three of more times per day or at least 200g of stool per day) of rapid onset that lasts less than 2 weeks
May be accompanied by nausea, vomiting, fever, or abdominal pain
Acute Gastroenteritis
Common findings on physical examination of patients with acute viral gastroenteritis include:
Mild diffuse abdominal tenderness on palpation
Gastroenteritis that is usually self-limited and is treated with supportive measures (fluid repletion and unrestricted nutrition)
Acute viral gastroenteritis
Increase fluid secretion and/or decreased absorption, produces an increased luminal fluid content that cannot be adequately reabsorbed leading to dehydration.
Mechanisms that cause diarrhea:
Adherence
Mucosal invasion
Enterotoxin production
Cytotoxin production
Gastritis involves ONLY the:
Stomach
Endoscopic or radiologic characteristics of abnormal-appearing gastric mucosa
Gastritis
Diagnosis of gastritis is defined as and requires:
histopathologic evidence of inflammation
Two most common causes of gastritis
Chronic NSAID use
Chronic Alcohol use
Gastritis is typically self limited but patients may benefit from:
PPI
Removal of the offending agent
If gastritis does not resolve with conservative management, consider referral for:
Endoscopy and H. Pylori testing
Chronic diarrheal illnesses may be classified as follows:
Osmotic
Inflammatory
Secretory
Chronic infections
Malabsorption syndromes
Motility disorders
Due to an increase in the osmotic load presented to the intestinal lumen either through excessive intake or diminished absorption
Osmotic (Medications/Zollinger - Ellison Syndrome)
Diarrhea
Chronic Parasitic Infection
Giardia Lamblia
Malabsorption syndromes:
Celiac disease
Whipple
Crohn disease
Lactose Intolerance
Motility disorder:
Irritable bowel syndrome
From a diagnostic and therapeutic standpoint, it is helpful to classify infectious diarrhea into syndromes that produce:
Inflammatory or blood diarrhea
AND
Non-inflammatory, non-bloody, or watery
The term “Inflammatory diarrhea” suggests colonic involvement by:
Invasive bacteria
Parasites
Toxin production
Frequent bloody, small-volume stools
Fever, abdominal cramps, tenesmus, and fecal urgency
Inflammatory diarrhea
Common causes of inflammatory diarrhea
Shigella
Salmonella
E. Coli
Protozoal: Entamoeba histolytica
Community outbreaks of acute infectious diarrhea suggest:
Viral etiology
Common food source
Acute infectious diarrhea in family members suggest:
Infectious origin
Acute Infectious Diarrhea
Ingestion of improperly stored or prepared food implicates:
Food Poisoning
Acute non-inflammatory diarrhea is generally milder and is caused by:
Viruses or toxins that affect the small intestine
The viruses or toxins in acute non-inflammatory diarrhea interfere with ________ balance, resulting in large-volume water diarrhea, nausea, vomiting, and cramps.
Salt and water
Food Poisoning with a short incubation
Symptoms 1-6 hours after consumption is from a:
Toxin
Short incubation food poisoning symptoms
Vomiting is the major complaint
Fever is absent
Longer incubation period of food poisoning (8-16) symptoms:
Vomiting is less prominent
Abdominal cramping is frequent
Fever is absent
Treatment for 90% of acute non-inflammatory diarrhea respond with in ___ days to simple rehydration therapy or antidiarrheal agents
5
Diarrhea
When should stool be sent for fecal leukocyte, ovum and parasite evaluation, and bacterial culture?
More than 7 days
Diarrhea
Prompt medical evaluation:
Fever, bloody diarrhea, or abdominal pain
Six or more unformed stools in 24 hours
Profuse watery diarrhea with dehydration
Diarrhea
Pay specific attention to the patient’s level of:
Hydration
Mental Status
Abdominal tenderness or peritonitis
Peritoneal findings may be present in infection with
C difficile
Enterohemorrhagic E coli
Diarrhea
Hospitalization is required in patients with
Severe dehydration
Toxicity
Marked Obesity
Symptoms:
- Sudden onset
- Diffuse abdominal tenderness
- Distention
- Increased bowel sounds
- Usually afebrile
- Positive tilts on fluid loss
Diarrhea
Labs for diarrhea
CBC/DIFF
Fecal Leukocyte
Fecal Occult
Stool Culture
C Difficile assay if recent hospitalization or antibiotics
Diarrhea labs:
Waterborne and foodborne disease, daycare center outbreaks, and international travelers
Stool exam for Giardia Lamblia (Giardiasis suspected)
Initial care of diarrhea
Assess vital signs for stability
Treat symptomatically
- Loperamide
- Bismuth subsalicylate
Diarrhea
Antibiotic treatment is recommended for:
Shigellosis, cholera, salmonellosis, listeriosis, and C. Diff
Diarrhea
Parasitic infection treatment is required for:
Amebiasis
Giardiasis
Cryptosporidiosis
Most digestive complaint
Constipation
Constipation may primarily originate within the _____ or may originate externally
Colon and rectum
Most common cause of constipation
Diminishing intake of fiber with decreased fluid intake
Systemic diseases that causes constipation
Hypothyroidism
Hyperparathyroidism
Diabetes
Chronic neurologic disorders
Medications that cause constipation
CCBs
Iron
Narcotic analgesics
Antipsychotics
Structural abnormalities that cause constipation
Colonic mass with obstruction
Neoplasm (Adenocarcinoma)
Anal Fissure
Constipation
Slow colonic transit is present in patient with a history of:
Chronic laxative abuse
Slow colonic transit may be:
Psychogenic or idiopathic
Symptoms:
- Infrequent stool
- Excessive straining
- Sense of incomplete evacuation
- Need for digital manipulation
Constipation
Labs for constipation
CBC for anemia
TFTs for suspected hypothyroidism
Electrolyte abnormalities
RADs for constipation
Upright Chest film and Abdominal Flat and erect for intestinal obstruction
First line treatment in constipation
Strict dietary changes and an exercise regimen
Increase water & fiber
Second line treatment of treatment for constipation
Stool softening or laxative use
Third line treatment for constipation
Suppositories or enemies
Hemorrhoids located above the dentate line
Subepithelial Cushions of the anorectum
No nervous innervation
Internal Hemorrhoids
Hemorrhoids from inferior hemorrhoidal veins
Below the dentate line
Covered with squamous epithelium
Nervous innervation
External Hemorrhoids
Occur in all adults and contribute to normal anal pressures and ensure a water-tight closure of the anal canal
Hemorrhoidal Venous Cushions
Rich vascular supply, highly sensitive location, and tendency to engorge and prolapse, common causes of anal pathology
Hemorroidal Venous Cushions
Subepithelial vascular cushions consisting of connective tissue, smooth muscle fibers, and arteriovenous communications between terminal branches of the superior rectal artery and rectal veins
Internal Hemorrhoids
Three primary locations of internal hemorrhoids
Right anterior
Right posterior
Left lateral
Hemorrhoids may become symptomatic as a result of activities that:
Increase venous pressure (result in distention and engorgement)
Can contribute to hemorrhoids
Straining, constipation, prolonged sitting, pregnancy, obesity, and low-fiber diets
Thrombosis of the external hemorrhoidal plexus results in:
Perianal hematoma
From coughing, heavy lifting, or straining
Exquisitely painful, tense and bluish perianal nodule
Pain is most severe within within the first few hours, gradually eases over 2-3 days
Perianal hematoma (thrombosis of external hemorrhoids)
Stage of Internal Hemorrhoids
Confined to the anal canal
Stage I
Stage of Internal Hemorrhoids
Gradually enlarge and protrude from the anal opening
Stage II
Stage of Internal Hemorrhoids
Manual reduction after bowel movements
Stage III
Stage of Internal Hemorrhoids
Chronically protruding and unresponsive to manual reduction
Stage IV
Protuberant purple nodules covered by mucosa
Prolapsed Hemorrhoids (internal)
Readily visible on perianal inspection
Tense bluish perianal nodule
Extremely tender to palpation
External hemorrhoids
RADs
Colonoscopy should be performed in all patients with:
Hematochezia
Treatment for thrombosed external hemorrhoids
Warm sitz baths
Analgesics and ointments
What time frame can you remove a hemorrhoid clot?
First 24-48 hours
Surgical excision (hemorrhoidectomy) is reserve for __% of patients with chronic severe bleeding from stage III or stage IV hemorrhoids or patients with acute thrombosed stage IV hemorrhoids
5-10%
Linear or rocket shaped ulcers that are usually <5mm in length
Anal Fissures
Anal Fissures occur most commonly in the:
Posterior Midline
Fissures that occur off midline raise suspicion of:
Serious diseases or Sexual assault
Fissures occur most from
Trauma to the anal canal during defecation
Symptoms:
- Severe, tearing pain
- Bright red blood
- Visual Inspection: Cracks in the epithelium
Anal Fissures
Treatment for Anal Fissures
Promote effortless painless bowel movements
- Fiber, sitz baths
- Topical anesthetics
- Oral Analgesics (Tylenol/NSAIDS)
Anal Fissures
Healing occurs within 2 months in up to __% of patients with conservative management
45%
Chronic fissures should be referred and treated with:
Topical Nitroglycerin
Diltiazem
Botulinum toxin injection
Obstruction of an anal gland that opens in the base of an anal crypt which normally drains into the anal canal
Anorectal abscess
Abscesses are frequently encountered in:
Perianal and Perirectal region
Almost all abscesses begin with involvement of an:
Anal crypt and its Gland
Infections from abscesses usually involve ____ tissue, where there is little resistance to the progression of infection.
Fatty
Spaces which can become infected alone or in combination with each other are:
Perianal
Intersphincteric
Ischiorectal
Deep postanal
Supralevator or pelvirectal
Most common and least common locations for anorectal abscesses
Most Common: Perianal Abscess
Least Common: Supralevator Abscess
What can occur from persistent anorectal abscesses?
Fistula formation
Anorectal abscesses are more common in:
Young middle-aged males
Symptoms:
Dull, aching, or throbbing pain that becomes worse immediately before defecation, lessened after defecation, but persists between bowel movements
Anorectal Abscess
RADs for Anorectal Abscess
Ultrasound for deep abscesses
Treatment for Anorectal Abscesses
Surgical and should be performed as soon as the diagnosis is made
Drainage - early and extensive
All perirectal abscesses should be drained in the:
Operating room
Isolated, simple, fluctuant perianal abscesses can be drained in:
Emergency Department
Simple, linear drainage incision is made, the abscess is more likely to occur because of:
Premature closure of skin edges
Anorectal abscesses with a linear drainage incision must be packed with gauze stops for at least:
24 hours
Abscesses with a cruciate/elliptical incision can be made over the fluctuate part. Trimming the flaps prevents closures and allows drainage. No packing is required but if done should be removed in:
24 hours
Abscesses with fever, leukocytosis, valvular heart disease, or cellulitis should be given:
Broad-Spectrum antibiotics
Initial Care of:
Anorectal Abscesses
Incision and Drainage
Complicated Cases: Refer to General Surgery
The chronic manifestation of the acute perirectal process that forms an anal abscess. When the abscess ruptures or drains, an epithelialized track can form that connects the abscess in the anus or rectum with the rectal skin.
Anorectal Fistula
“Non Healing” anorectal abscess following draining
Chronic purulent discharge
Intermittent rectal pain
Anorectal Fistula
Treatment plan for Anorectal Fistula
Require higher level of care.
MEDEVAC if unstable.
Consider MEDEVAC if in pain for appropriate treatment/medications.
A malformation in the sacrococcygeal region; ranging from asymptomatic hair-containing cysts and sinuses to large symptomatic abscesses.
Pilonidal Disease
Pilonidal sinuses or cysts occur in the midline in the:
Upper part of the natal cleft, over the sacrum and coccyx
Pilonidal sinus is formed by the:
Pentation of the skin by an ingrown hair
Pilonidal disease usually occurs before what age?
40
Symptoms:
- Swelling, pain, persistent discharge over the lower sacrum and coccyx
- Pt complains of a Tender mass
- Exam reveals inflammation midline with one or more sinus openings
Pilonidal disease
The most common finding of pilonidal disease
Single opening from which hair is protruding
Spontaneous and ongoing drainage is the common indicator and if an abscess is present it is usually:
Small
Considered diagnostic for pilonidal disease
Patient gives a history of recurrent infection at the base of spine
Labs for pilonidal disease
CBC if patient has systemic symptoms (fever, chills, etc)
Treatment for pilonidal disease
Surgical treatment
Definitive treatment for pilonidal disease
Surgical excision
Surgical excisions are typically performed __ weeks after initial infection
6 weeks
Pilonidal disease
Simple I&D’s recure because of:
Hair follicles within the sinus tracts were not debrided
Initial care of pilonidal disease
I&D with suction. In more complicated cases refer to general surgery.
Inflammatory bowel disease includes what conditions?
Ulcerative Colitis
Crohn’s diease
What influences inflammatory bowel disease?
Genetic factors
Inflammatory bowel disease
What disrupts the intestinal mucosa and leads to a chronic inflammatory process?
Immune response
Inflammation that is limited to colonic mucosa
Can have pseudo-polyps
Ulcerative Colitis
Can affect any segment of the GI tract
“Skip lesions”
Transmural inflammation
Crohn’s Disease
Crohn’s disease and ulcerative colitis may be associated in __% of patients with a number of extra-intestinal manifestations
50%
Most common portion affected by the GI tract from Crohn’s
Terminal ilium
When Crohn’s affects the ilium, what is affected?
Malabsorption of digested foods
Vitamin B12 deficiency
Malabsorption of bile salts and calcium
Crohn’s
The clinician should take particular note of:
Fevers
General sense of well-being
Weight loss
Abdominal pain
Number of liquid bowel movements per day
Surgical/hospitalization history
Crohn’s
___ of patients with large or small bowel involvement develop perianal disease
1/3
Symptoms:
Intermittent bouts of low-grade fever, diarrhea, RLQ pain
Diffuse abd pain/discomfort, RLQ mass/tenderness
Perianal diease
Crohn’s
Crohn’s
__ of cases involve the small bowel only
1/3
Crohn’s
___ of all cases involve the small bowel and colon, usually ileocolitis
Half
Strongly associated with the development of Crohn’s disease, resistance to medical therapy, and early disease relapse
Cigarette Smoking
Lab for Crohn’s disease that should be obtained in all patients to assess immune response and nutritional status
CBC and serum albumin
RADs for Crohn’s
Endoscopy
Colonoscopy
ACUTE Exacerbations: CT
Available therapies for Crohn’s
5-aminosalicylic acid derivatives (5-ASA)
Corticosteroids
Immuno-modulating and biologic agents
Crohn’s:
Tender abdominal mass with fever and leukocytosis
Diagnosis: Emergent CT
Treatment: Broad-spectrum antibiotics
Intra-abdominal abscess formation
Crohn’s:
Develop secondary to active inflammation
Precipitated by dietary indiscretion or untreated flare
Diagnosis: Up-right abdominal X-ray
Treatment: NG tube to decompress GI tract
Small bowel obstruction
Symptom that is unusual in patients with Crohn’s
Bleed/severe hemorrhage
Screening colonoscopy for patients with Crohn’s to detect cancer should be done every:
8 or more years after initial flare/diagnosis
Patients with Crohn’s are __x likely to develop colon cancer than the general population
20x
Ulcerative Colitis is limited to:
Colonic mucosa
Ulcerative Colitis is caused by:
Abnormal activation of the immune system
Ulcerative Colitis causes:
Ulceration
Edema
Bleeding (Common)
Fluid and electrolyte loss
UC that extends to the splenic flexure
Left-sided colitis
UC that extends more proximally
Extensive colitis
UC is more common in what type of patients?
Non-smokers and former smokers
Ulcerative Colitis is less severe in:
Active Smokers
Associated with reduced risk of developing ulcerative colitis
Appendectomy before the age of 20
What can mimic the symptoms of Ulcerative Colitis?
Infectious colitis (Diverticulitis)
Pertinent patient history for Ulcerative Colitis
Stool frequency and character
Presence and amount of rectal bleeding
Diffuse crampy abdominal pain
Fecal urgency
Tenesmus
Hallmark of Ulcerative Colitis
Bloody diarrhea
Symptoms:
Bloody diarrhea
Lower abdominal cramps and fecal urgency
Anemia and low serum albumin
Negative Stool cultures
Ulcerative Colitis
Ulcerative Colitis:
- Gradual onset of infrequent diarrhea (<5 a day)
- Stool is formed or loose
- Fecal urgency and tenesmus
- Cramps relieved by defecation
- No abdominal tenderness
Mild UC
Ulcerative Colitis:
-Severe diarrhea with frequent bleeding
Abdominal pain and tenderness (not severe)
Mild fever, anemia, hypoalbuminemia
Moderate UC
Ulcerative Colitis:
- More than 6 blood bowel movements per day resulting in severe anemia, hypovolemia, and impaired nutrition with hypoalbuminemia
- Abdominal pain and tenderness
Severe UC
Initial assessment of UC patient with a flair should focus on:
Volume status (BP, HR, Urine output, mental status)
Nutritional status
Labs for Ulcerative Colitis
CBC
ESR & CRP (Inflammatory studies)
Stool Bacterial culture
C Diff
Ova and Parasites
Serum Albumin
Electrolytes
What lab values reflect Ulcerative Colitis disease severity?
Hct
Sedimentation rate
Serum Albumin
RADs for Ulcerative Colitis
CT
Colonoscopy to screen for cancer (8 years post initial diagnosis)
Two main treatment objectives when treating patients with ulcerative colitis
Terminate the attack
Prevent recurrence of attacks
Medication options for UC
Mesalamine
Corticosteroid
5-ASA, Immunomodulating & biologic agents
Antidiarrheal agents (NEGATIVE for C Diff)
Curative treatment for Ulcerative Colitis
Total proctocolectomy
Treatment for mild/moderate colitis:
Treatment recommended by GI
Limit intake of caffeine and gas-producing vegetables
Treatment for severe UC
Hospitalization
Discontinue all oral intake for 24-48 hours
Restore volume with fluids
Serial abdominal exams
The physiology of sensation in the gut is:
Multifaceted