GIT Disorders
GIT Disorders
GIT Disorders
- Occurs when contents move so rapidly through the intestine and colon with inadequate time for absorption of GI contents. - Sometimes associated with abdominal pain or cramping and nausea and vomiting
CONSTITUENTS OF AN AVERAGE STOOL: 1. 1/3 unabsorbed food 2. Remainder made up of: - cast off intestinal epithelial cells - microbes - partially dried secretions 150 200 grams daily 100 150ml of water lost in the stools
MECHANISMS OF DIARRHEA:
1. Accumulation of EXCESSIVE FLUID
VOLUME within the gut; - distends the gut wall and thus initiates strong propulsive movements
2. INCREASE PROPULSIVE MOTILITY
- due to local reflex stimulation or generalized neural or Humoral stimulation of the intestines - less time for water to be absorbed in the small intestines
DIARRHEA: Pathophysiology
Types of diarrhea: secretory, osmotic and
mixed diarrhea. Secretory diarrhea is usually high-volume diarrhea caused by increased production and secretion of water and electrolytes by the intestinal mucosa into the intestinal lumen. Osmotic diarrhea occurs when water is pulled into the intestines by the osmotic pressure of unabsorbed particles, slowing the reabsorption of water.
DIARRHEA: Pathophysiology
Mixed diarrhea is caused by increased
peristalsis (usually from IBD) and a combination of increased secretion and decreased absorption in the bowel.
CLASSIFICATION OF DIARRHEA:
According to ONSET and DURATION 1. ACUTE DIARRHEA sudden and short duration causes: infectious agent toxins poisons drugs 2. CHRONIC DIARRHEA Insiduous onset long duration( three weeks)
A.
Small bowel
Large bowel
1. Vol of stool
2. frequency
large
1-2x daily
small
6-10x daily
absent
absent Worse after meals or just before bowel movment
present
present Relieved by defecation or passage of flatus
stools Abdominal cramps and distention Intestinal rumbling Anorexia and thirst Painful spasmodic contractions of the anus and ineffectual straining (tenesmus) Watery stools are characteristic of small bowel disease. Loose, semisolid stools are associated more often with disorders of the colon.
organisms, bacterial toxins, blood, fat and electrolytes. Barium enema may assist in identifying the cause.
DIARRHEA: Complications
Fluid and electrolyte imbalance (cardiac
symptoms, preventing complications, and eliminating or treating the underlying disease. Certain medications may reduce the severity of the diarrhea and treat the underlying disease.
pattern of diarrhea. Encourage bed rest and intake of fluids and food low in bulk until the acute attack subsides. When food intake is tolerated, recommend a bland diet of semisolid and solid food. Avoid caffeine, carbonated beverages and very hot and very cold food. Restrict milk products, fat, whole-grain products, fresh fruits and vegetables for several days.
diphenoxylate (Lomotil) and loperamide (Imodium) as prescribed. IV therapy for rapid rehydration especially for the elderly and those with preexisting GI conditions. Monitor serum electrolyte levels Report immediately clinical evidence of dysrhythmias or a change in the level of consciousness.
diarrheal stool contains digestive enzymes that can irritate the skin. The patient should follow a perianal skin care routine to decrease irritation and excoriation. Use skin sealants and moisture barriers as needed.
b.
Constipation decrease in the frequency of stool or stools that are hard, dry and smaller volume than normal.
-
Causes of Constipation:
1. Inadequate dietary fibers 2. inadequate fluid intake 3. failure to respond to the defecation reflex
because of pain or inconvenient timing 4. muscle weakness and inactivity 5. neurologic disorders 6.drugs (opiates,antacids, iron medications 7. obstructions caused by tumors and strictures
CONSTIPATION: Pathophysiology
Poorly understood.
Interference with mucosal transport,
Decreased appetite
Headache, fatigue Indigestion
idiopathic, but secondary causes should be eliminated. Diagnosis is based on results of the patients history, physical examination, possibly a barium enema or sigmoidoscopy, and stool testing for occult blood.
CONSTIPATION: Complications
Hypertension
Fecal impaction Hemorrhoids and fissures
Megacolon
constipation and includes education, bowel habit training, increased fiber and fluid intake, and judicious use of laxatives. Enemas and rectal suppositories are generally not recommended for constipation and should be reserved for the treatment of impaction or for preparing the bowel for surgery or diagnostic procedures.
cholinergic agents (e.g., bethanechol), cholinesterase inhibitors (e.g., neostigmine), and prokinetic agents (e.g., metoclopramide) to determine the role of these agents in treating constipation.
of constipation, past and present elimination patterns, the patients expectation of normal bowel elimination, and lifestyle information during health history review. Past medical and surgical history, current medications, and laxative and enema use are important, as is information about the sensation of rectal fullness or pressure, abdominal pain, excessive straining at defecation and flatulence.
elimination Ensuring adequate intake of fluids and highfiber foods Teach methods to avoid constipation Relieve anxiety about bowel elimination patterns Avoid complications
treatment
Increasing intestinal bulk by increasing dietary fiber
content
The GIT ANATOMY The Esophagus A hollow collapsible tube Length- 10 inches Made up of stratified squamous epithelium
The upper third contains skeletal muscles The middle third contains mixed skeletal and smooth muscles The lower third contains smooth muscles and the esophago-gastric/ cardiac sphincter is found here
But: Increased
But: Decreased
esophageal disease. Ranges from an uncomfortable feeling that a bolus of food is caught in the upper esophagus to acute pain on swallowing (odynophagia).
esophagus, accompanied by failure of the esophageal sphincter to relax in response to swallowing. Primary symptoms: - is difficulty of swallowing both liquids and solids, - regurgitation of food either spontaneously or intentionally, - chest pain and heart burn (pyrosis), - Nocturnal cough - and secondary pulmonary complications from aspiration of gastric contents.
Epidemiology: 1:100.000 in US equally in both sexes Age of Onset: 20 and 40 years Pathogenesis: 1. Primary achalasia: decreased ganglion cells, with fibrosis and scarring in Myenteric (Auerbachs) plexus. 2. Secondary achalasia: e.g Chagas disease, polio Diabetic autonomic neuropathy
Achalasia
narrowing at the gastroesophageal junction. Manometry 1. aperistalsis 2. Elevated LES pressure 3. Partial or incomplete relaxation of LES
Pneumatic or forceful dilation or surgical separation of the muscle fibers. - Endoscopic injection of botulinum toxin Surgical treatment by esophagomyotomy (Heller myotomy) in which the esophageal muscle fibers are separated to relieve the lower esophageal stricture.
Patients with achalasia have a slightly higher
Etiology
Causes is UNKOWN 40-70 year old Congenital weakening of the muscles in the diaphragm
around the esophagogastric opening Increase intra abdominal pressure - obesity, pregnancy, ascites, trauma
Complications: both types may ulcerate, causing bleeding and perforation Paraesophageal hernias strangulation and obtruction
MEDICAL MANAGEMENT: 1. Drug therapy: antacids to reduce acidity and relieve discomfort 2. Modification of diet: elimination of spicy foods and caffeine 3. Surgery, reduction of hiatal hernia via abdominal or thoracic approach.
DIAGNOSTIC TEST
Barium swallow And fluoroscopy/endoscopy
UPPER GI system
The esophagus is not an uncommon site of injury Result from: stab or bullet wounds of the neck or chest trauma from motor vehicle crash caustic injury from a chemical burn puncture by surgical instrumentation Spontaneous perforation Boerhaaves syndrome - violent retching Clinical Manifestations: Persistent pain followed by dysphagia Infection, fever, leukocytosis and severe hypotension Signs of pneumothorax * subcutaneous emphysema Diagnosis: Endoscopy
Broad-spectrum antibiotic therapy Suction by NGT insertion to reduce amount of gastric juice. NPO; parenteral nutrition Surgery may be necessary to close the wound Post-operative nursing management
from the esophagus. Sodium bicarbonate + tartaric acid may be used to increase intraluminal pressure by the formation of gas. Caution must be used because of the risk of perforation.
the esophagus, or by ingestion of caustic agents like strong acids and bases. May be intentional or accidental. Patient is usually emotionally distraught as well as in acute physical pain. The patient may be profoundly toxic, febrile, and in shock. Esophagoscopy and barium swallow are performed as soon as possible.
prevent further exposure of the esophagus to the caustic agent. Corticosteroids? Antibiotics? Nutritional support via enteral or parenteral feeding Prevent or manage strictures of the esophagus.
not respond to dilation. Reconstruction may be accomplished by esophagectomy and colon interposition to replace the portion of esophagus removed.
CONDITION OF THE ESOPHAGUS ASSESSMENT findings for EV 1. Hematemesis 2. Melena 3. Ascites 4. jaundice 5.hepatomegaly/splenomegaly
ASSESSMENT findings for EV Signs of Shock- tachycardia, hypotension, tachypnea, cold clammy skin, narrowed pulse pressure
NURSING INTERVENTIONS FOR EV 1. Monitor VS strictly. Note for signs of shock 2. Monitor for LOC 3. Maintain NPO
transfusion
CONDITION OF THE ESOPHAGUS NURSING INTERVENTIONS FOR EV 9. Prepare to assist in surgical management:
Endoscopic sclerotherapy
Variceal ligation
Shunt procedures
Conditions of the Esophagus Gastro-esophageal reflux FACTORS Usually due to incompetent lower esophageal sphincter , pyloric stenosis or motility disorder Symptoms may mimic ANGINA or MI
Diagnostic test Endoscopy or barium swallow Gastric ambulatory pH analysis Note for the pH of the esophagus, usually done for 24 hours The pH probe is located 5 inches above the lower esophageal sphincter The machine registers the different pH of the refluxed material into the esophagus
NURSING INTERVENTIONS 4. Avoid foods and drinks TWO hours before bedtime 5. Elevate the head of the bed with an approximately 8-inch block
NURSING INTERVENTIONS 6. Administer prescribed H2blockers, PPI and prokinetic meds like cisapride, metochlopromide 7. Advise proper weight reduction
Proton-pump inhibitors Prokinetic drugs (urecholine, domperidone, metoclopramide) Surgical intervention (fundoplication)
untreated GERD. Identified as a precancerous condition that, if left untreated, can result in adenocarcinoma of the esophagus. Patients complain of symptoms of GERD. EGD is performed revealing an esophageal lining that is red rather than pink. On biopsy, cells obtained from the esophagus resemble those of the intestine.
amount of cell changes. EGD should be done every 6 to 12 months if there are minor cell changes.
more than three times as often in men as in women. (4:1) 50-70yr old Often in middle and lower portion Chronic irritation is a risk factor. Associated with ingestion of alcohol and with the use of tobacco. Vitamin deficiency Vit A & C Usually of the squamous cell epidermoid type, but the incidence of adenocarcinoma is increasing.
Dysphagia, initially with solid foods and eventually with liquids Sensation of mass in the throat Odynophagia Substernal pain or fullness Regurgitation of undigested food with foul breath and singultus.
Diagnosis is confirmed most often by EGD
Early stage: cure; Late stage: palliation Surgery, irradiation, chemotherapy or a combination
Nursing Management:
Improving the patients nutritional and physical condition in preparation for surgery, radiation therapy or chemotherapy Immediate postoperative care is similar to that provided for patients undergoing thoracic surgery.
Acids, bile salts, NSAIDs Alcohol, ischemia, H. pylori Destruction of mucosal barrier Acid back diffusion into the mucosa Destruction of mucosal cells Inc. Acid and Pepsin in mucosa Histamine
Further mucosal erosions Inc. Vasodilation Destruction of blood vessels Inc. capillary permeability Bleeding Loss of plasma protein into
gastric lumen
Ulceration
Mucosal edema
AGE
MALE:FEMALE RATIO INCIDENCE STOMACH ACID BODY WEIGHT EPIGASTRIC PAIN
30 60 years
2-3:1 80% of peptic ulcers Hypersecretion Normal or weight gain 2-3 hrs post-meal, early morning awakenings, relieved by food intake Uncommon Less common, melena More common
MALIGNANCY
RISK FACTORS
Rare
H. pylori, alcohol, smoking, cirrhosis, stress
Occasionally
H. pylori, gastritis, alcohol, smoking, NSAIDs, stress
Pathogenesis
1. 2. 3. 4. 5.
6.
Social Factors tobacco smoking, drugs, alcohol Physiologic factors Gastric acid Genetic Factors Infectious etiology H. pylori Associated dse e.g. Antral atropic gastritis Psychosomatic factors chronic anxiety, Type A personality
Stress ulcers:
Cushings ulcers are common in patients with
trauma to the brain. They may occur in the esophagus, stomach or duodenum and are usually deeper and more penetrating than stress ulcers. Curlings ulcers are frequently observed about 72 hours after extensive burns and involves the antrum of the stomach or the duodenum.
procedure because it allows direct visualization of inflammatory changes, ulcers and lesions. Stools may be tested periodically until they are negative for occult blood. H. pylori infection may be determined by biopsy and histology with culture, as well as a breath test and serologic test for H. pylori antibodies.
Conditions of the Stomach NURSING INTERVENTIONS 3. Monitor for complications of bleeding, perforation and intractable pain 4. Provide teaching about stress reduction and relaxation techniques
NURSING INTERVENTIONS FOR BLEEDING 1. Maintain on NPO 2. Administer IVF and medications 3. Monitor hydration status, hematocrit and hemoglobin
NURSING INTERVENTIONS FOR BLEEDING 4. Assist with iced SALINE lavage 5. Insert NGT for decompression and lavage
SURGICAL PROCEDURES FOR PUD Total gastrectomy, vagotomy, gastric resection, Billroth I and II, pyloroplasty
2. Antrectomy removal of the antrum of the stomach to eliminate the gastgric phase of digestion 3. Pyloroplasty enlargement of the pyloric sphincter with acceleration of gastric emptying
4. Gastroduodenostomy (Billroth I) removal of the lower portion of the stomach with anastomosis of the remaining portion of the duodenum. 5. GAstrojejunostomy (Billroth II): removal of the antrum and the distal portion of the stomach and duodenum with anastomosis of the remaining portion of the stomach in the jejunum.
6. Gastrectomy: removal of 60% to 80% of the stomach. 7. Esophagojejunostomy (total gastrectomy): removal of the entire stomach with a loop jejunum anastomosed to the esophagus
DUMPING SYNDROME:
Control of gastric emptying is lost, following gastric resection Ingested food are rapidly dumped into the intestine Signs and Symptoms: 1. Abdominal cramps 2. Nausea and diarrhea 3. Hypovolemia dizziness, weakness, rapid pulse and sweating 4. Hypoglycemia 2 to 3 hrs after meal
Management: 1. Dietary changes small frequent feeding high protein low carbohydrates 2. Fluids should be taken between meals 3. Medication to decreased intestinal motility
1. Food intake
2. Gastric resection ecresed gastric capacity and loss of pyloric sphincter 3. Large amt of undiluted chyme is dumped in small intestine
Fluid shifts fromm blood into small intestines To dilute hypertonic chyme 6. Distended intestine -pain,cramps - nausea and vomitin
5. Hypovolemia: -decreased blood pressure -faint,weak pulse, dizzy -tachycardia - pallor, diaphoresis
7. Rapid digestion and absorption of food intake Hyperglycemia and inc. insulin secretions 9. Hypoglycemia -weak, confused -Tachycardia -Pallor, diaphoresis
Follow-Up Care
Recurrence within a year may be prevented with the
prophylactic use of H2-receptor antagonists given at a reduced dose. Not all patients require maintenance therapy. Likelihood of recurrence is reduced if the patient avoids smoking, coffee and other caffeinated beverages, alcohol, and ulcerogenic medications.
regional enteritis (i.e., Crohns disease or granulomatous colitis) and ulcerative colitis. The cause is still unknown. Researchers think it is triggered by environmental agents such as pesticides, food additives, tobacco, and radiation. NSAIDs have been found to exacerbate IBD. Allergies and immune disorders have also been suggested as causes.
LATE PATHOLOGY
LOCATION BLEEDING PERIANAL INVOLVEMENT
FISTULAS
RECTAL INVOLVEMENT DIARRHEA
Common
About 20% Less severe
Rare
Almost 100% Severe
SIGMOIDOSCOPY
COLONOSCOPY
SYSTEMIC COMPLICATIONS
CROHNS DISEASE Also called Regional Enteritis An inflammatory disease of the GIT affecting usually the small intestine
CROHNS DISEASE ETIOLOGY: unknown The terminal ileum thickens, with scarring, ulcerations, abscess formation and narrowing of the lumen
Ulcerative Colitis
Crohns Dse SYMTOMS Diarrhea Rectal Bleeding Tenesmus Abdominal Pain Fever Vomiting Weight loss +++ + 0 +++ ++ +++ +++ +++ +++
+++
phase 2. Monitor for complications like severe bleeding, dehydration, electrolyte imbalance 3. Monitor bowel sounds, stool and blood studies
comfort 5. Administer IVF, electrolytes and TPN if prescribed Monitor complications of diarrhea
gas-forming foods, MILK products and foods such as whole grains, nuts, RAW fruits and vegetables especially SPINACH, pepper, alcohol and caffeine
liquid LOW residue, high protein diet 8. Administer drugs- antiinflammatory, antibiotics, steroids, bulk-forming agents and vitamin/iron supplements
Pathophysiology
Functional disorder of intestinal motility
irritation Vascular or metabolic disturbance Evidence of inflammation or tissue changes in the intestinal mucosa
Due to stress and irritants R/t sensitivity to motor activity and distention CRAMPY LOWER ABDOMINAL PAIN Relieved by defecation Pain increases 1-2 hrs after meal Alternating C & D
Clinical Manifestations
Altered bowel patterns
Diverticulitis
NURSING INTERVENTIONS 1. Maintain NPO during acute phase 2. Provide bed rest 3. Administer antibiotics, analgesics like meperidine (morphine is not used) and anti-spasmodics 4. Monitor for potential complications like perforation, hemorrhage and fistula 5. Increase fluid intake
BOWEL OBSTRUCTION
-
Types of Obstruction:
A. Mechanical Obstruction
- actual physical barriers B. Functional Obstruction - ileus/ a functional failure of progressive intestinal transit
MECHANICAL OBSTRUCTION: Obturation of the lumen -meconium -intussusception -gallstones -impactions fecal, barium, bezoar, worms
b.
Lesions of Bowel *Congenital - atresia and stenosis - Imperforate anus - Duplications *Traumatic * Inflammatory - regional enteritis - Diverticulitis - Chronic ulcerative colitis
B. INADEQUATE PROPULSIVE MOTILITY a. Neuromascular defects - Megacolon - Paralytic ileus Abdominal causes -Intestinal distention - Peritonitis - Retroperitoneal lesions Systemic causes - Electrolyte imbalances - Toxemias
Simple Obstruction - obstructed lumen with intact blood supply Strangulated Obstruction - messenteric vessels are occluded Closed loop Obstruction - both limbs of the loop are obstructed
Bowel obstruction
Signs and Symptoms Abdominal pain Abdominal rigidity Increased BOWEL sound in early stage and ABSENT BOWEL sound in late stage Abdominal distention Vomiting and fluid imbalance
Hirschsprungs Disease
Bowel obstruction
Diagnosis
: Abdominal x-ray
MANAGEMENT: 1. Fluid and electrolyte therapy 2. Decompression of the gastrointestinal tract. 3. Timely surgical interventions
HERNIAS protrusion of an organ or part of an organ through the wall of the cavity
HERNIAS FACTORS:
caused by failure of certain normal openings to close during fetal development increased intra-abdominal
pressure
INGUINAL and FEMORAL HERNIA Inguinal hernia -protrusion of peritoneum through a defect in the abdominal wall in the inguinal canal - account for 75% of all hernias Two Types: 1. Indirect Inguinal Hernia 2. Direct Inguinal Hernia
extend in the scrotum The herniated viscus or fat lies within the spermatic cord The hernia is directed by the spermatic cord toward the scrotum Inc. risk of strangulation and infarct Much more common than direct inguinal hernia Common in children 10% bilateral
Boundaries Of Inguinal Triangle (Hesselbachs Triangle) Lateral inferior epigastric artery Medial lateral rectus abdominis muscle border Inferior Inguinal ligament
Femoral hernia
Petits Triangle Hernia (Lumbar triangle) - affects all age group - males are frequently affected - presents with a lump near the buttocks
Boundaries of lumbar Triangle: Lateral : External oblique muscles Superior : Latissimus dorsi muscles Inferior : Iliac crest
Richters Hernia - Hernia in which one wall of intestine is trapped by constricting ring of hernia - More common in femoral henia - Presents with a painful tender groin mass
Assessment: history of intermittent appearance of a mass in the groin Complication: 1. Incarceration (irreducibility without vascular compromise) 2.Strangulation ( ischemia and necrosis ) 3.Intestinal obstruction with fluid sequestration and electrolyte imbalance and damage to the urinary bladder or spermatic cord during surgical repair
Intervention: surgery as soon as diagnosis is made; rarely close spontaneously Acute incarceration or strangulation requires emergent surgical repair Elective herniorrhaphy
Nursing intervention: if incarceration occurs apply ice bag; elevate foot of bed post op: small dressing; encourage to ambulate; resume activities gradually
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