NCM 116a Notes
Gastrointestinal Disturbances NCM 116
Module focuses on Care of Clients with Problems in Nutrition, and Gastrointestinal, Metabolism and Endocrine, Perception and Coordination, Acute and Chronic conditions.
Reminders for NCM 116 Lecture
Tardiness is discouraged.
Absences should be avoided.
Cheating is prohibited.
Copy and take down notes diligently.
Study regularly.
Outline of Topics
I. Review of Anatomy and Physiology of the Gastrointestinal System
a. Gastrointestinal tract
b. Accessory Organs
c. Process of Ingestion
d. Process of Digestion
e. Process of Elimination
II. Assessment of the Gastrointestinal System
a. Age Related Changes on the GIT and Accessory Organs
b. Physical Assessment
c. Laboratory and diagnostic tests
III. Gastrointestinal Disturbances
a. Disturbances in Ingestion
i. Gastroesophageal Reflux Disease
b. Disturbances in Digestion
i. Gastritis
ii. Peptic Ulcer Disease
c. Disturbances in Absorption
i. Crohn's disease
ii. Appendicitis
d. Disturbances in Elimination
i. Bowel Obstruction
ii. Hemorrhoids
IV. Disturbances Affecting the Accessory Organs
a. Liver Cirrhosis
b. Cholelithiasis/cholecystitis
c. Pancreatitis
Gastrointestinal System Anatomy
Components:
Mouth (teeth, tongue)
Salivary glands
Pharynx
Esophagus
Stomach
Liver
Gallbladder
Pancreas
Small intestine (Duodenum, Jejunum, Ileum)
Large intestine (Cecum, Colon, Rectum)
Appendix
Anus
Esophagus Details
Upper esophageal sphincter
Lower esophageal sphincter
Stomach Anatomy
Muscularis externa:
Longitudinal layer
Circular layer
Oblique layer
Pyloric sphincter (valve) at pylorus
Duodenum
Lesser curvature
Pyloric canal
Pyloric antrum
Greater curvature
Cardia
Fundus
Serosa
Body
Lumen
Rugae of mucosa
Small Intestine Sections
Duodenum
Jejunum
Ileum
Small Intestine Details
Layers of the Stomach:
Mucosa
Muscularis mucosa
Submucosa
Muscle layer
Subserosa
Serosa
Hepatic portal vein goes to the liver
Lumen with microvilli
Large Intestine Sections
Right colic (hepatic) flexure
Transverse colon
Ascending colon
Ileum
Left colic (splenic) flexure
Descending colon
Cecum
Vermiform appendix
Anal canal
Sigmoid colon
Rectum
Liver
Largest internal organ of the body
Weight: g
Composed of lobules
Contains blood vessels (Hepatic Portal vein, Hepatic artery, Hepatic vein)
Functions of the Liver
1. Glucose metabolism
Glycogenesis: glucose to glycogen
Lipogenesis: CHO to fats
Glycogenolysis: glycogen to glucose
2. CHON (protein) metabolism
Synthesis of:
Plasma CHON: albumin, alpha and beta globulins
Clotting factors: fibrinogen, prothrombin
Gluconeogenesis: CHON to glucose
3. Fat metabolism
Metabolism of triglycerides to fatty acids
Bile synthesis: ml, yellow-green in color
Functions:
Excretion of bilirubin
Emulsification of fats, cholesterol, and fat-soluble vitamins
Bile Composition:
Water and electrolytes (Na, K, Ca, Chloride, bicarbonate)
Lecithin, fatty acids, cholesterol, bilirubin, bile salts
Enterohepatic circulation: Hepatocytes -> Bile -> Intestine
4. Storage
CHO, CHON, fats
Fat-soluble vitamins (A, D, E, K)
Water-soluble vitamins
Minerals: iron, copper, magnesium
5. Detoxification
Steroid hormones
Drugs
6. Ammonia to Urea
7. Phagocytosis: Kupffer cells
8. Blood Reservoir: between ml of blood
9. Bilirubin excretion
RBC Destruction
Extravascular Pathway for RBC Destruction (Liver, Bone marrow, & Spleen)
Hemoglobin breaks down into Globin and Heme.
Globin becomes Amino acids, which enter the Amino acid pool and are Recycled.
Heme becomes Bilirubin, which is Excreted.
Iron (Fe2) is Recycled.
Liver Function Question
An important function of the liver is to: C. Filter the body's blood
Pancreas
Head of pancreas
Tail of pancreas
Lobules
Acinar cells secrete digestive enzymes.
Pancreatic islet cells secrete hormones.
Exocrine cells secrete pancreatic juice.
Common bile duct
Pancreatic duct
Gallbladder
Gallbladder
Sphincter of Oddi
Major duodenal papilla
Liver
Common hepatic duct
Cystic duct
Common bile duct
Pancreas
Pancreatic duct
Duodenum portion of the small intestine
Processes of the Digestive System
PROCESS OF INGESTION
the process of taking in food through the mouth.
PROCESS OF DIGESTION
the mechanical and chemical breakdown of food into small organic fragments.
PROCESS OF ELIMINATION
the elimination of undigested food content and waste products
Steps of the Digestive System
INGESTION
PROPULSION
MECHANICAL DIGESTION
CHEMICAL DIGESTION
ABSORPTION
DEFECATION
Assessment: Age Related Changes on the GIT
Older than 65 years:
Dentures or partial plates and bridges
Ill-fitting dentures cause eating problems and can lead to nutritional deficits.
With advanced age:
muscles for swallowing becomes weaker and less coordinated; food particles are retained in the cheek pouches or pharynx.
The esophageal sphincter become less efficient at opening and closing, and risk for aspiration increases.
Taste buds atrophy, causing inability to distinguish between flavors, particularly between salty and sweet.
After age 70:
parietal cells in the stomach decrease their secretion of hydrochloric acid, enzyme and intrinsic factor.
The mucosa of the small intestine becomes less absorptive, and the large intestine may develop diminished motility.
Assessment: Age Related Changes on the Accessory Organs
Gallstone incidence is higher in older adults
Secretion of lipase from the pancreas decreases, altering fat digestion, and may contribute to a depressed nutritional state in older adults.
Physical Assessment: Subjective Data
I. Demographic data
Age
Gender
Culture
Occupation
II. Personal and Family History
Previous GI disorders
Abdominal surgery
History of diabetes, CA of the digestive tract, peptic ulcer, gallbladder disease, hepatitis, alcoholism, intestinal polyps, obesity
III. Diet History
Conditions manifested may result from alterations in dietary intake and absorption of nutrients
Inquire about any special diet and food allergies
Describe usual foods eaten daily and the time meals are taken
Explore any changes that have occurred in eating habits as a result of illness
Changes in taste and any difficulty or pain with swallowing
Abdominal pain/discomfort accompanies eating, nausea, vomiting, or dyspepsia
Unintentional weight loss
Alcohol and caffeine consumption
IV. Socioeconomic Status
Ability to obtain food, medications, and medical care
V. Current Health Problems
Chronologic account of the current problem, symptoms, and treatments taken
Explore characteristics associated with each symptom
Types of pain: burning, gnawing, stabbing
Location of pain: point involved site
Physical Assessment: Objective Data
Mouth
Equipment: gloves, penlight, tongue depressor
Inspect:
Lips – color, moisture, cracking, lesion
Inner surfaces of the lips and oral mucosa
Tongue – color, coating, ulcers, and variations in size and shape
Teeth – evidence of dental caries and note the absence of teeth
Gums – pink, moist, and smooth
Describe moisture, color, lesion
Note unpleasant odors
Fetor oris
Acetone breath
Ammonia
Pharynx: use tongue depressor to depress the tongue and examine the pharynx; instruct to say “ah”
Palpate
U – shape under the tongue for nodules
Abdomen (IAPP)
Preparation:
1. Empty the bladder
2. Lie in a supine position head raised slightly with knees bent or slightly flexed, keeping the arms at the sides to prevent inadvertent tensing of the abdominal muscle
RLQ, LUQ, RUQ, LLQ
Inspect
color, texture, scars, striae, shape, rashes, lesions and dilated blood vessels, symmetry, bulging, muscular position and condition of umbilicus, and movements
describe the contour:
flat
convex (rounded)
concave (sunken)
Protruberant or distended
Auscultate: peristalsis & bruits
diaphragm of stethoscope
All 4 quadrants: RLQ, LLQ, LUQ, RUQ
Bowel sounds: gurgles/min
Hypoactive: <5 sounds/min
Hyperactive: >30 sounds/min in one quadrant and decreased sound in another quadrant
Absence: no sound on each of the 4 quadrants for 5 mins
Vascular sounds:
Bruits (swooshing sound)
abdominal aorta, renal arteries, iliac arteries, femoral arteries
Peritoneal friction rub – heard over the spleen or liver
Venous hum
Epigastric, periumbilical region
Palpation
Done to detect tenderness, sensitivity, masses, swelling, and muscular resistance and to confirm (+) findings
Check:
liver
spleen and kidney
urinary bladder distention
Types:
light palpation
deep palpation
Percussion
Tapping to detect presence of air, fluid, or masses underlying tissues
Purpose:
To determine the size of solid organ
To detect presence of masses, fluid, and air
To estimate the size of liver and spleen
Notes:
Tympany or resonant sound: high - pitched, loud musical sound heard over areas filled with air
Dull or flat - medium pitched, soft thudlike sound heard over a solid organ
Excessive air occurs with irritation and inflammation
Assess Ascites
Place patient supine and expose the abdomen
Hands at the sides with knees flexed
Observe for bulging flanks indicating fluid accumulation
If with ascites, measure abdominal girth
Laboratory Tests
1. Fecal analysis (stool examination)
Fecal occult blood test (FOBT)
Stool culture or fecal immunochemical test (FIT)
Fecal occult blood test - Analysis of stool for blood
Nursing care:
Explain the procedure
Advise patient to avoid red meat, iron, and high fiber for 1 – 3 days
Document the administration of aspirin, vitamin C, and anti-inflammatory drugs
Fecal analysis (cont.)
Fecal fat test - Analysis of stool for fat
Nursing care:
Explain the procedure
Advise patient to restrict alcohol intake and maintain a high- fat diet 72 hours before the examination
Refrigerate the specimen until it can be sent to the laboratory
Document current medications
2. Serum Bilirubin – to detect abnormal bilirubin metabolism
Normal values:
Total: mg/dl
Direct: mg/dl
Explain that a blood sample will be taken; no fasting is required
3. Alanine aminotransferase (ALT) – an enzyme used to detect liver disease
Normal value: International units/L
Explain that a blood sample will be taken; no fasting is required
4. Aspartate aminotransferase (AST) – An enzyme found in heart, liver, and muscle tissue; to detect acute hepatitis or biliary destruction
Normal value: units/L
Explain that a blood sample will be taken; no fasting is required
5. Alkaline phosphatase (ALP) – Enzyme found in bone, liver and placenta; to detect liver tumor in conjunction with other liver findings; rises when there is destruction of the biliary tree
Normal value: units/L
Explain that a blood sample will be taken; no fasting is required
6. Albumin – to detect altered CHON metabolism
Normal value: g/dL
Explain that a blood sample will be taken; no fasting is required
7. Prothrombin (PT) – Reduced in patients with liver disease, causing a prolonged clotting time
Normal value: sec
Explain that a blood sample will be taken; no fasting is required
8. Partial thromboplastin time (PTT) – to detect deficiencies of stage II clotting mechanisms; prolonged in liver disease
Normal value: sec
Explain that a blood sample will be taken; no fasting is required
9. Activated PTT (APTT) – decreased in liver failure
Normal value: sec
If patient is receiving heparin injections, draw specimen mins before next dose
Helicobacter pylori antibody test – to detect antibodies to H. pylori bacterium in the stomach; H pylori is a risk factor for gastric and duodenal ulcers, chronic gastritis, or ulcerative esophagitis
Normal: none present
Explain that a blood sample will be taken; no fasting is required
Esophageal pH Monitoring/24-hour pH testing
Probe is placed 5 cm above LES and pH is measured for 24 hours
pH less than 4 above the LES = GERD
Nursing Care
Instruct patient not to use any antacids, chewing gum, lozenges or hard candy during the study
For throat discomfort: ice chips or dyclonine hydrochloride (Cepacol) spray
To prevent reflux: avoid large meals, caffeine, alcohol, and lying in supine position after meals
Diagnostic Tests
Radiologic Examination
1. Upper GI Series (UGI) or Barium Swallow
To locate obstruction, ulceration, or growths in the esophagus, stomach, and duodenum
Nursing care:
Light supper: soup, toast, jello, or tea night before the procedure
Advise client to be on NPO and avoid smoking 8 – 12 hours before the exam
Client will drink 16 – 20 ounces of a chalky liquid (barium sulfate or meglumine diatrizoate {Gastrografin}) before the exam.
Following the exam, ensure the client eliminates the barium by giving laxatives and forcing fluids as appropriate.
Stool may be white up to 3 days after the test
Observe for barium impaction: distended abdomen, constipation
2. Barium enema (BE) – to locate tumors, obstruction, and ulceration
Nursing care:
Advise client to be on NPO 8 hours before the test
Give ordered laxative and enema; bowel must be clear of stool
3. Computed tomography (CT) – to visualize soft tissue and density changes when sonography is inconclusive; to detect tumors, abscesses, trauma, cysts, inflammation and bleeding
Nursing care:
Advise client to be on NPO for 4 hours when oral contrast is to be used
Secure consent
Assess for allergy to iodine or shellfish
Explain the following:
Position will be supine on a special narrow table, and that the body will be in the circular opening of the scanner
A strap will be placed over the waist to secure him on the table
Clicking noises will be heard from the machine
The test takes about 30 mins
An IV contrast agent that causes a transitory warm feeling may be given to enhance images
Patient will be asked to hold his breath at certain points in the test
The machine uses narrow x-ray beams
4. Magnetic Resonance Imaging (MRI) with or without contrast - to evaluate abnormalities in the liver or other abdominal structures
Nursing Care:
Assess for metal implants or pregnancy (will not do the exam if present)
Remove all metal objects including dental bridges
Magnetic Resonance Imaging (MRI) (cont.)
Nursing Care:
NPO 6 hours prior the exam
The test will take 30 – 90 mins
A thumping sound will be heard during the test
There will be a tingling sensation in metal fillings
5. Ultrasound Imaging Ultrasonography – to obtain images of soft tissue that indicate density changes; to diagnose gallstones, tumor, cysts, abscesses, etc
Ultrasound of the abdomen, hepatobiliary, and gallbladder
Nursing Care:
Advise client to remain NPO for 8 – 12 hours prior to the test
Endoscopic Studies
1. Upper GI Endoscopy/ Esophagogastroduodenoscopy – to visualize the esophagus, stomach, and duodenum with a lighted tube to detect tumor, ulceration, site of bleeding or obstruction
Nursing Care:
Preparation
Advise client to remain NPO for 8 hours prior to the test
Secure consent
Endoscopic Studies
1. Esophagogastroduodenoscopy (cont.)
After the test
Side-lying position
Remain on NPO after the test until gag reflex returns
NSS gargle, throat lozenges
Vital signs q 15 – 30 mins as ordered
Watch for signs of perforation
Assess for bleeding, neck or throat pain and dyspnea
Avoid driving if given sedatives
2. Lower GI Endoscopy/Colonoscopy/Proctosigmoidoscopy – to directly view the lining of the colon with a flexible endoscope
Nursing Care:
Secure consent
Clear liquid 1 – 3 days before the test
NPO 8 hours before the test
Bowel preparation as ordered
After the test observe for rectal bleeding and signs of perforation
3. Endoscopic Retrograde Cholangiopancreatography (ERCP) - to directly visualize gastrointestinal structures, and to retrieve gallstones from the distal common bile duct, dilate structures, and biopsy tumors.
Nursing care:
Advise client to be on NPO for 8 hours before the test.
Following the test, assess vital signs and gag reflex, and monitor for complications (pancreatitis is the most common).
4. Liver biopsy – to remove a tissue sample for microscopic examination and diagnosis of various liver disorders
Nursing Care:
Secure consent
NPO 4 – 8 hours prior to the test
Place patient in supine or left lateral position
Procedure may take 15 mins
Liver biopsy (cont.)
Nursing Care:
Assess for allergy to local anesthetics
Empty the bladder prior to the procedure
Check coagulation studies for abnormalities
After biopsy, place a small dressing over puncture site; position patient on right side with support to provide pressure over biopsy site for 1 -2 hours; observe for bleeding
Liver biopsy (cont.)
Nursing Care:
Post biopsy
Monitor vital signs q 15 mins for 1 hour; then q 30 mins for 4 hours; then q 4 for 24 hours
Assess for tenderness at biopsy site
Observe for respiratory problems
Instruct patient to avoid coughing or straining, that might increase intra-abdominal pressure
Refrain from heavy lifting or strenuous activities for 1 – 2 weeks.
Unit III. Disorders of the GIT
Disturbances in Ingestion
GASTROESOPHAGEAL REFLUX DISEASE (GERD)
Is the backward flow of stomach contents (chyme) into the esophagus without associated vomiting
10% - heartburn
45% - symptom at least once a month
Increases after age 50
Occur at any age
Prevalence is equal across gender, ethnic and cultural groups
90% with GERD has hiatal hernia
Pathophysiology of GERD
Causes:
Transient relaxation or incompetent Lower Esophageal Sphincter (LES) – relaxation allows fluids or food to reflux into the esophagus from the stomach
Development of esophageal stricture
Delayed stomach emptying
Obesity
Pregnancy
Hiatal hernia
Is the result of a defect in the wall of the diaphragm where the esophagus passes through; this creates protrusion of part of the stomach or the lower part of the esophagus up into the thoracic cavity.
Drugs
Beta-adrenergic blockers (Inderal)
Calcium channel blockers (verapamil)
Estrogen, progesterone
Diazepam (valium)
Theophylline
Nicotine
Pathophysiology
Exposure to gastric contents initiates an inflammatory response
With repeated exposure, inflammation becomes chronic
Normal squamous epithelial cells are replaced with columnar epithelium
Clinical Manifestations of GERD
Heartburn (dyspepsia) and reflux
Sour taste in the morning on arising
Chest pain
Coughing
Belching
Flatulence
Regurgitation
Dysphagia or odynophagia
Dyspepsia
Hypersalivation
Esophagitis
Diagnostic Tests and Management of GERD
Diagnostic tests
Upper GI endoscopy
Ambulatory esophageal pH monitoring
Barium swallow
Management:
Diet therapy
Avoid high fat oils and spicy foods
Eat 4 – 6 meals a day
Eat slowly and chew foods thoroughly
Avoid carbonated beverages – it may increase bloating
Limit or eliminate alcohol, tomato-based products, caffeine, citrus juice, raw onions, chocolate, coffee, peppermint, and spearmint- these foods may either relax the sphincter or increase acid production
Lifestyle changes
Wait 2 – 3 hours after eating before lying down
Avoid constrictive clothing
Lose weight at least 10%
Sleep with head of the bed elevated 6 to 8 inches with blocks or foam bolster pillow
Quit smoking
Participate in activities: exercise, meditation, deep breathing, and laughter
Drug therapy
Antacids – neutralize stomach acid; 1-2 hrs. after a meal
Maalox, Tums, Gaviscon
Histamine2- Receptor Antagonist: Suppress acid secretion by blocking H2 receptors on parietal cells; taken with meals; advise to avoid cigarettes, aspirin and other NSAIDs
Cimetidine (Tagamet), Ranitidine (Zantac), Nizatidine (Axid), Famotidine (Pepcid)
Proton Pump Inhibitors – suppress secretion of gastric acid
Omeprazole (Prilosec),Lansoprazole (Prevacid)
Misoprostol (Cytotec) – prevents gastric ulcers caused by long-term therapy with NSAIDS
Miscellaneous – provides protective coating barrier over ulcer crafter; 30 mins - 1 hour before meal
Sucralfate (Carafate)
Education
Surgery
Increase the pressure in the lower LES
Laparoscopic procedure: Nissen funduplication
the fundus of the stomach is wrapped around the esophagus to create a new valve junction
Complication:
Precancerous lesions in Barrett esophagus with constant irritation
Pneumonitis
Dental caries
Gastritis
Disturbances in Digestion
GASTRITIS – A diffuse or localized inflammation of the gastric or stomach mucosa
Atrophic gastritis involves all layers of the stomach. It is seen in association with gastric ulcer and malignancies of the stomach.
Gastritis associated with uremia is common in patients with kidney failure. The excessive urea that builds up from the kidney failure causes gastric irritation.
Untreated chronic gastritis may progress to ulcer formation and upper GI hemorrhage.
Types
1. Acute
Lasting several hours to a few days
Short-term inflammatory process due to ingestion of chemical agents
2. Chronic
Resulting from repeated exposure to irritating agents or recurring episodes of acute gastritis
Types
Type A - autoimmune; gastric CA, pernicious anemia
Type B - associated with helicobacter pylori infection
Incidence:
Highest in the 5th & 6th decades of life
Heavy drinkers and smokers
Causes: Acute
Excessive amount of alcohol
Contaminated food
Cocaine use
Ingestion of medication: corticosteroids and NSAIDs – aspirin and ibuprofen
Chronic
Bacterial infection: Helicobacter pylori (H. pylori)
Virus
parasites
Irritating foods
Radiation
Ingestion of strong acid and alkali
Smoking
Pathophysiology
Damage to the gastric mucosal
Disruption to the gastric mucosal barrier
Back diffusion of acid and pepsin
Inflammation
Secretes a scanty amount of gastric juice containing very little acid but much mucus
Superficial erosion
Manifestations:
Acute gastritis
Anorexia
Nausea and vomiting
Abdominal pain and cramping
diarrhea
Epigastric pain
Fever
Feeling of fullness
Dyspepsia
Chronic gastritis
Vague complaints of epigastric pain that is relieved by food
Anorexia
Nausea and vomiting
Intolerance to fatty and spicy foods
Massive hemorrhage
Pernicious anemia
Diagnostic Tests:
Endoscopy
Upper GI series
Medical Management:
NPO if with nausea and vomiting
Bland or liquid diet
Fluid-electrolyte replacement
Vitamin B12
Drugs
Antacids: 1-2 hrs after a meal
Maalox, Tums
H2 receptor antagonist: taken with meals
Tagamet (Cimetidine), Zantac (Ranitidine)
Cytoprotective drug: 30 mins - 1 hour before meal
Carafate (Sucralfate)
Antispasmodics to decrease the pain of stomach spasms
Nursing Diagnosis
Alteration in comfort: Pain R/T inflammation of the gastric mucosa
Fluid volume deficit R/T vomiting and bleeding
Imbalanced nutrition less than body requirements R/T anorexia
Peptic Ulcer Disease
b. PEPTIC ULCER DISEASE
Peptic - from Greek means to digest
Any ulceration that forms in the mucosal wall of the stomach, pylorus, duodenum, or in the esophagus
Types:
Gastric ulcer
Duodenal ulcer
Gastric Ulcer
Ages 55 - 70
Male: Female = 1:1
Occur less frequently
Heal more slowly
Duodenal Ulcer
Ages 30 - 60
Male: Female =
most common
Causes:
H. pylori - 80%
NSAIDs, ASA, steroids
Cigarette smoking
Family history of PUD
Stress
Alcohol
Caffeine
Gastritis
Zollinger-Ellison syndrome
Irregular hurried meals
Fatty, spicy, highly acidic foods
Type A personality
Type O blood
Genetic
Pathophysiology of Peptic Ulcer Disease
Breakdown of gastric mucosal barrier
Release of histamine and cholinergic nerve stimulation
Increased acid-back diffusion into the mucosal cells
Erosion and injury to small blood vessels
Bleeding and edema
Clinical Manifestations:
Gnawing, burning, aching, or hunger-like upper abdomen pain
Gastric ulcer: pain 1-2 hrs after a meal, relieved by vomiting; hemorrhage more likely to occur
Duodenal ulcer: pain 2-4 hrs after a meal; relieved by food; often awakened between 1-3 am; hemorrhage less likely to occur
Complications:
Hemorrhage
Perforation
Penetration
Pyloric or gastric outlet obstruction
Diagnostic tests:
Barium swallow (upper GI series)
Endoscopy
Medical management:
1. Medications
Goal: reduce the symptoms
Antacids
H2 receptor antagonist: Cimetidine, Ranitidine
Cytoprotective drug: Sucralfate
Proton pump inhibitor: Losec (Omeprazole)
H. Pylori: Amoxicillin/tetracycline, Metronidazole, Bismuth
2. Lifestyle Modifications