Exam 2 shortened Flashcards

(151 cards)

1
Q

primary HTN

A

no known cause
associated with risk factors

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2
Q

secondary HTN

A

specific disease states
medications such as estrogen, steroids, immunosuppressants

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3
Q

malignant HTN

A

severe with rapid progression
individuals 30-50 years old

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4
Q

pulmonary HTN

A

vasoconstriction
increased vascular resistance
poor tissue perfusion
right sided HF
hypoxemia

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5
Q

rebound HTN

A

abrupt d/c of meds

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6
Q

white coat HTN

A

in clinical setting

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7
Q

isolated systolic HTN

A

elderly
structural and functional change associated with age
decrease in elasticity of everything including blood vessels
not able to handle blood, increased stroke volume
cerebrovascular morbidity and mortality

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8
Q

normal BP

A

systolic <120
AND
diastolic <60

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9
Q

elevated BP (pre HTN)

A

systolic: 120-129
AND
diastolic: <80

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10
Q

stage 1 HTN

A

systolic: 130-139
OR
diastolic 80-89

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11
Q

stage 2 HTN

A

systolic: >140
OR
diastolic >90

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12
Q

hypertensive urgency (BP, organ damage, treatment)

A

very high BP
no organ damage
fast acting agents (ACE, BB)
normalize BP within 24-48 hours

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13
Q

hypertensive emergency (BP, organ damage, med, treatment)

A

BP >180/120
organ damage
IV vasodilators
reduce BP by 25% within one hour
gradual reduction over 6 hours
not too fast, can cause organ failure from sudden decrease in perfusion

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14
Q

signs and symptoms of PVD

A

claudication of the foot arch, hands, and/or lower limbs
pain may occur at rest
increased sensitivity to cold with numbness
diminished distal pulses
cool extremities

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15
Q

nursing care for PVD

A

monitor every 15, 30, 60 minutes
assess extremity and compare:
-pulse
-BP
-infection
-bleeding
limited ROM with bed rest for 24 hours
avoid crossing legs, standing still, trauma to extremities, constriction
wear closed toe shoes and white socks
night light and skid-free rugs
no smoking
legs lower than heart
avoid cold temps

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16
Q

arterial vs venous pain

A

arterial: claudication, numbness, and tingling
venous: feeling of fullness with prolonged standing or sitting

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17
Q

arterial vs venous pulse

A

arterial: decreased or absent bilaterally
venous: difficult to find or full

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18
Q

arterial vs venous color

A

arterial: pale, elevated leg; dusky/red, dependent leg
venous: cyanotic on dependency

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19
Q

arterial vs venous temperature

A

arterial: cool
venous: warm

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20
Q

arterial vs venous edema

A

arterial: absent or mild
venous: present

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21
Q

arterial vs venous skin

A

arterial: dry
venous: moist

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22
Q

arterial vs venous ulcers

A

arterial: toes and gangrene
venous: superficial with gangrene

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23
Q

raynaud’s

A

vasospasms of hands/feet
affects 17-50 years old
more common in women
worse in cold and stress
connective tissue, autoimmune disorder
blanching/cyanosis
numbness
throbbing pain

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24
Q

raynaud’s treatment

A

calcium channel or adrenergic blockers
sympathectomy
decrease cold temp
no smoking
wear gloves
avoid drugs that increase vasospasm (OTC decongestants)

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25
what can raynaud's lead to
ulcers and gangrene
26
buerger's
occlusive disease affects upper and lower extremities young adult male smokers causes fibrosis and scarring small vessels too big
27
buerger's manifestations
same as PVD claudication of foot arch, hands, and/or lower limbs pain may occur at rest increased sensitivity to cold with numbness diminished distal pulses cool extremities
28
buerger's treatment
smoking cessation avoid triggers meds for vasodilation treat ulcer and gangrene may need amputation
29
DVT risk factors
surgery, HRT estrogen, pregnancy, trauma, obesity, prolonged standing, personal/family history
30
signs and symptoms of DVT
calf or groin tenderness positive homans (dorsiflexion of foot causes pain) redness sudden onset of unilateral swelling of leg warmth induration (hardening) along blood vessel SOB if progresses to PE
31
treatment of DVT
compression stockings bedrest elevation of extremity avoid knee gatch warm soaks (prescription needed) no massage or ROM to affected extremity monitor changes
32
heparin (what is it, therapeutic range, given to who, antidote)
low grade molecular weight INR: 2-3 given to low risk pts at home antidote: protamine sulfate
33
warfarin (do not take with what, and antidote)
ASA and vitamin K (antidote)
34
PE risk factors
venous stasis HRT fracture (fat embolism, can't use anticoag, use steroids instead)
35
PE s&s
chest pain tachy dyspnea dry cough blood tinged sputum petechiae hypotension low grade fever
36
treatment of PE
anticoags complete bed rest monitor antidote for anticoags surgery
37
varicose veins
protruding veins feeling of fullness and pain when standing vein wall thickens and dilates valves are affected veins become tortuous
38
varicose veins risk factors
obesity, pregnancy, occupations that require standing, heart disease, family history
39
varicose veins treatment
elastic stockings walk elevation sclerotherapy surgical removal of vein laser surgery
40
intermittent claudication develops when
after a fixed amount of activity certain distance causes cramping and burning in toes, heels, and foot, and muscle discomfort
41
claudication distance
denotes severity of the disease predictable
42
what does rest pain mean in claudication
disease is advancing
43
complication of claudication
leg ulcers
44
stage 1 of claudication
asymptomatic reduced pulses
45
stage 2 of claudication
claudication pain while walking or exercising relieved with rest intermittent claudication
46
stage 3 of claudication
claudication with rest pain when feet are in dependent position the pain is relieved (bc of blood flow), dependent rubor most likely will progress
47
stage 4 of claudication
necrosis and gangrene CLI (critical limb ischemia) ulcers tissue near obstruction is so damaged
48
arterial ulcers (what is it, effects where, characteristics, pain, depth, exudate)
decreased arterial blood flow usually effects toes and lateral malleolus sharp edges no granulation tissue pale base nail beds yellow, gray, necrotic, and rigid atrophy in nearby tissue LOTS of pain bc lack of oxygen (ischemic) deep or superficial minimal exudate
49
venous ulcers (characteristics, effects where, pain, exudate, depth)
irregular shape healthy base warm foot distal pulse palpable edema around ankle (backup of venous blood) eczema (scaly) develops in ankle area and medial malleoli minimal pain heavy exudate not very deep
50
foot care of PVD
no creams or ointments esp between toes
51
care after bypass surgery
broad spectrum abx 48h prior assess the site
52
iron deficiency anemia (microcytic)
most common type total body iron content decreased iron stores depleted (<3g) 1 mg absorbed for every 10-20 ingested ferritin <12 G/L
53
risk factors of iron deficiency anemia
blood loss menstruating and pregnant women adolescents children infants GI tumors malabsorption high fiber diet chronic alcoholism
54
diagnosis of iron deficiency anemia
GI series (barium studies) occult blood upper endoscopy colonoscopy
55
management of iron deficiency anemia
diet rich in iron (christmas! and avoid foods that block iron absorption [milk]) supplemental iron -compliance -dark tarry stools -with juice/water (straw, rinse mouth) -observe for toxicity -vitamin C -avoid antacids -injections (z-trak)
56
folate deficiency anemia (megaloblastic)
folic acid (b vitamin) small amount stored nervous system not effected
57
vitamin B12 deficiency (pernicious) (diagnosed how, what it is)
diagnosed by schilling test decreased absorption of vitamin B12 abnormal structure and function -megaloblastic -macrocytic erythropoiesis nerve function myelin production
58
risk factors of pernicious anemia
family history european chronic gastritis meds vegetarian diet gastric surgery
59
S&S of pernicious anemia
SOB brain fog, lack of focus/coordination dry skin premature gray hair vision problems infertility menstrual changes incontinence mouth ulcers swollen or cracked tongue
60
management of pernicious anemia
monthly B12 injections IM or nasal cyanocobalamin iron supplements folic acid monitor cardiac rhythm integumentary daily weight dizziness oxygen energy conservation blood transfusion erythropoietin -hemoglobin and hct 2x/week
61
aplastic anemia
normocytic, normochromic bone marrow hypoplasia or aplasia RBCs are normal size and content but low in number alteration of stem cell and marrow (replaced by fat)
62
risk factors of aplastic anemia
congenital idiopathic acquired -myelotoxins -autoimmune -infections
63
S&S of aplastic anemia
pancytopenia lassitude (lack of energy) anorexia infection petechiae purpura retinal hemorrhage
64
management of aplastic anemia
immediate withdrawal of offending agent pharmacologic transfusion radiotherapy bone marrow transplant
65
nursing management of aplastic anemia
explain bone marrow aspiration/biopsy risk for infection gas exchange impaired ineffective tissue perfusion
66
posterior iliac crest aspiration
most frequent prone or lateral position, knees flexed, pillow under head, eyes away
67
anterior iliac crest
supine position, hips and knees flexed, eyes away, light towel over face vertebrae ribs sternum
68
sickle cell anemia
both parents have trait (recessive, 25% chance of inheritance) partial or complete replacement of abnormal hgb S for normal hgb A deformed cell changes from round to sickle cell shape asymptomatic until 4-6 months bc of fetal hemoglobin
69
diagnosis of sickle cell
hgb electrophoresis sickle-turbidity test (sickledex)
70
assessment of sickle cell
health history and physical exam pain lab data (s-shaped hemoglobin) presence of symptoms swelling, fever, pain sickle cell crisis blood loss (menses, GI) cardio neuro
71
clinical manifestations of sickle cell
anemia hemolysis hgb 5-11 g/dl jaundice bone expansion cardio organ involvement
72
medical management of sickle cell
pain management hydration aggressive treatment of infection (prophylactic abx for 2 months-5 years) chemo corticosteroids bone marrow function (reticulocyte count) stem cell transplant
73
nursing diagnosis of sickle cell
ineffective coping fluid volume fatigue acute pain risk for infection and powerlessness deficient knowledge
74
Collaborative problems and potential complications of anemia
Hypoxia Ischemia Infection Dehydration CVA Anemia Acute and chronic renal failure Heart failure Impotence Poor compliance Substance abuse Polycythemia
75
complications of sickle cell
Vaso-occlusive crisis -Most common type of crisis Severe pain -Ischemia -Infarction -Fever, pain, tissue engorgement Aplastic crisis -Paravirus B19 -Invades RBC precursors -Destroys RBC Splenic sequestration crisis -Life threatening -Death can occur within hours -Blood pools in the spleen -Profound anemia, hypovolemia, shock acute chest syndrome CVA emotional and behavioral problems
76
when to discard blood for transfusion
after 4 hours
77
care for blood transfusion
given early in crisis, might reduce ischemic pain treated with hydration and opioids- taught deep breathing and incentive spirometer
78
pneumonia nursing care
supplemental oxygen (nasal cannula 1-3L, non rebreather if osat less than 90, watch for oxygen toxicity) elevate head of the bed to semi or high fowlers splint chest with folded hands or pillow while coughing to reduce pain fluids (2-3000mL of fluids to thin the mucus [unless kidney or cardiac pt], no dairy) postural drainage (relies on gravity, position head down to give more space for lungs to expand reposition q2 hours controlled breathing and coughing q1h avoid large crowds, get flu vaccine (unless egg allergy or Guillain barre), and avoid allergies (frequent asthma leads to PNA) INCENTIVE SPIROMETRY AVOIDS ATELECTASIS
79
oxygen toxicity S&S
fatigue, irritability, LOC changes
80
S&S of PNA
dyspnea hypoxemia (cyanosis, nail bed clubbing) high temp cough tachy resp distress productive cough stabbing chest pain tachypnea orthopnea NVD anorexia cerebral hypoxia (changes in LOC, agitation, CONFUSION, coma)
81
patho of PNA
bacteria enters bronchus, fluid develops, blood enters, infected blood goes through capillaries bc alveolar membrane is fragile and broken, sepsis!
82
consolidation
lungs full of liquid and mucus, oxygen can't get through, ineffective air exchange (pleural effusion) decreased lung capacity
83
assessment of PNA
breath sounds (crackles, expiratory wheeze, tactile fremitus increased, areas of consolidation [risk for atelectasis]) chest x-rays for areas of consolidation pulse oximetry blood culture ABG CBC (elevated WBC) PFT (tidal volume, vital capacity, total lung capacity)
84
complications of PNA
atelectasis pleural effusion lung abscess (localized collection of bacteria caused by aspiration) pleurisy peri/endocarditis
85
nursing care of asthma
bronchodilators (short acting like albuterol; long acting like salmeterol) anti-inflammatory, mast cell stabilizers, antihistamines methylxanthines (theophylline) last resort anticholinergic (decrease secretions) low dose oxygen hydration PT and postural drainage controlled breathing and coughing every hour INCENTIVE SPIROMETRY semi fowlers reduce panic and anxiety
86
S&S of asthma
bilateral wheezing (expiratory) chest tightness SOB dyspnea coughing overuse of accessory muscles leading to barrel chest acute resp distress syndrome (airway too constricted to let air out [asthma attack]) anxiety and panic hyperventilation
87
patho of asthma
hyperresponsiveness from immune system causes bronchospasm and bronchoconstriction releasing histamine, prostanoids, cytokinins causing vasoconstriction causing bronchial edema causing increased secretions causing mucus plug
88
mild intermittent asthma
<2 attacks/week and normal life between exasperations
89
mild persistent asthma
>2 attacks/week but <1 per day ADLs interrupted
90
moderate persistent asthma
daily symptoms and use of short acting inhaler to get through the day affects activity
91
severe persistent asthma
continuous symptoms with limited activity
92
assessment of asthma
chest xray ABG PFT breath sounds
93
complications of asthma
Pneumonia bc of inability to get rif of secretions Atelectasis Hypoxemia Respiratory acidosis Emphysema Chronic bronchitis Status asthmaticus (life threatening)
94
status asthmaticus nursing care
intubation bronchodilators, steroids, epinephrine IV oxygen management of asthma attacks after stabilized
95
S&S of status asthmaticus
Labored breathing Wheezing that is worse on inspiration and expiration Nonproductive cough Overuse of accessory muscles → barrel chest Cyanosis Respiratory acidosis
96
patho of status asthmaticus
Severe persistent asthma attacks caused from hypersensitivity related to NSAIDS Complication of asthma when people don’t respond to treatment
97
assessment of status asthmaticus
count respirations
98
complication of status asthmaticus
pneumothorax (lung can't inflate bc of air in pleural space)
99
pt teaching of TB including diet and supplements
drug regime importance of compliance preventing spread to others no special precautions of personal articles mask until meds suppress infection well balanced diet (high protein, calorie, calcium) supplements (iron, vit B6)
100
foods to avoid with TB
tuna aged cheese soy sauce yeast extract red wine causes SE (HA, diaphoresis, HTN, palpitations) and decreases absorption. contains tyramine and histamine
101
meds for TB
INH and rifampin (combination abx) pyrazinamide (for active TB) ethambutol (myambutol)
102
how long is TB treatment
6-12 months
103
TB skin test interpretation and contraindications
Area of indurations read within 48-72 hours 10 mm or more: positive 5-9 mm: doubtful (usually repeated) For HIV: 5 or more is positive BCG vaccine or HIV
104
Chest radiography (CXR) for TB
not specific
105
QuantiFERON-TB gold test
Results within 24-36 hours and are not affected by prior vaccination with BCG
106
TB convertor
newly infected negative to positive + skin does not mean active disease (cellular immunity developed)
107
tidal volume (what is it, amount, and what effects it)
The amount of air inspired and expired in a normal breath 500 mL May not vary
108
total lung capacity (what is it, amount, and what effects it)
the maximum amount the lungs can expand TV+IRV+ERV+RV (5800 mL) decreased with atelectasis and pneumonia increased in COPD
109
vital capacity (what is it, amount, and what effects it)
the maximum amount of air exhaled after maximal inhalation TV+IRV+ERV (4600 mL) decrease in neuromuscular disease, generalized fatigue, atelectasis, pulmonary edema, COPD, and obesity
110
inspiratory reserve volume (what is it and amount)
the maximum amount of air inhaled after a normal inhalation 3000 mL
111
expiratory reserve volume (what is it, amount, and what effects it)
maximum amount of air that can be exhaled forcibly after normal exhalation 1100 mL decreased with obesity, ascites, pregnancy
112
residual volume (what is it, amount, and what effects it)
volume of air remaining in lungs after maximum exhalation 1200 mL may be increased with obstructive disease
113
inspiratory capacity (what is it, amount, and what effects it)
maximum amount of air inhaled after normal expiration TV+IRV (3500 mL) decrease in restrictive disease or obesity
114
functional residual capacity (what is it, amount, and what effects it)
amount of air remaining in lungs after normal expiration ERV+RV (2300 mL) may be increased in COPD decreased in ARDS and obesity
115
cholecystitis
Inflammation of the gallbladder Usually caused by stones that irritate the gallbladder, causes obstruction of cystic duct Over 90% of cases due to calculous
116
cholelithiasis
Calculi in gallbladder Gallstones block cystic duct Leads to cholecystitis
117
choledocholithiasis
Stones in the common bile duct Cholesterol stones or pigmented
118
bile
stored in gallbladder made and secreted in liver food enters duodenum and digests food by bile emulsifies fats excretes RBCs gives stool dark color
119
gallbladder
Storage depot for bile Release bile CBD (common bile duct) connects gallbladder and duodenum
120
incidence of cholecystitis
Obesity Native americans Increases with age (40+) Women nearly 70% of cases Hormone therapies (BC) Mortality rate higher among men Frequent changes in weight (rapid loss) Diseases (diabetes, crohn’s, cystic fibrosis, ileal resection increases risk for cholelithiasis → cholecystitis) Frequent surgeries Anything that causes us to lose fluid causes crystallization leading to stones Way to remember: fair, female, fat, over fourty
121
cholecystitis causes what
high fat triggers attacks calculus big cause calculi make gallbladder inflamed, pain in RUQ, and edema. infection causes pus to leak in blood causing peritonitis edema may cut off blood supply
122
cholecystitis in elderly
may not show S&S until oliguria and septic shock
123
acalculous
no gallstones major surgery trauma severe burns cysts primary infection blood transfusions causes in fluid and electrolyte balance (dehydration)
124
biliary colic
Spasm of biliary duct as it tries to push stone out Severe pain RUQ Radiate around to back and right shoulder Triggered by large, rich meals
125
clinical manifestations of cholecystitis
biliary colic (hallmark) Rebound tenderness and rigidity at RUQ N/V Feeling of fullness Fever Exacerbations Jaundice with CBD (common bile duct) obstruction; must be cholelithiasis Pruritus (itching) Clay colored stools Steatorrhea (from lack of emulsification of stools, when there is obstructive jaundice) Tea colored urine
126
cholelithiasis
may go unnoticed until biliary colic with obstruction of cystic duct As gallbladder becomes distended, pain intensifies Blood tests show increase in bilirubin Stone may retreat or pass
127
pigment gallstone
from backup of bile
128
cholesterol gallstone
Bile supersaturated with cholesterol bc of: Decrease in bile acids dissolving cholesterol OR Increase in cholesterol
129
diagnostics of cholelithiasis
Ultrasonography (NPO after midnight) Cholecystography ERCP (Diagnostic and treatment) PCT (Treatment and diagnosis, looks at structures of the gallbladder and liver) MRI (shows calcified stones) Blood test (Non specific, to rule out other conditions, high WBC shows inflammatory process, + cholesterol can cause cholesterol stones, liver enzymes, pancreatic enzymes) Abdominal x-ray (calcified stones)
130
treatment of cholelithiasis
ERCP, PTC Removing stones Non surgical, endoscope in duodenum, wire snare placed in gallbladder, removes stone (complication is bleeding) Extracorporeal lithotripsy (crushing of the stone) Dissolve stones Lies in cushion filled with water and high energy sound waves, shatters the stone Only if the stones are <4 in amount or <3 cm in diameter Drink 2-3 quarts of water a day to get rid of any stone fragments NG tube low fat avoid alcohol avoid gas forming foods avoid fried foods eat high carbs and protein
131
surgeries for cholelithiasis (once symptoms subside)
Laparoscopic cholecystectomy (fewer risks) Camera used Fine after 3-4 days May complain of shoulder pain bc of injected air into abdomen (tell pt that they can use heat applications for 15-20 min every hour and ambulate to promote CO2 absorption) Bile duct injury serious side effect Report abdominal symptoms Open cholecystectomy Can be delayed for 6 weeks until symptoms subside Actual incision
132
drug therapy for cholelithiasis
abx lipid lowering agents antispasmodics analgesics (demerol NOT morphine unless severe)
133
post op care for cholelithiasis
Assess Monitor VS Skin care around biliary drainage (some bile may leak out) T-tube (300-400mL in first 24h, serosanguineous in the beginning, bile color after 24 hours, tube clamped during meals and 1-2 hours after meals, kept below gallbladder to prevent reflux and infection, emptied every 8 hours, pts may have diarrhea after cholecystectomy, but stool should be brown after a week, physician removes tube) NG tube to relieve distension and vomiting Pain control I&O Encourage activity low fat diet, limit weight and pregnancies cough and deep breathe
134
what to report after cholelithiasis surgery
Fever (leads to cholecystitis) Jaundice Pruritus (itching can mean blockage with backup of bilirubin) Dark color urine Pale color stools Rigidity of abdomen (peritonitis) Sudden drop in BP (shock) Gangrene of gallbladder and peritonitis r/t perforation Resp problems (frequent problem, hard to deep breathe bc of place of incision)
135
dumping syndrome
Food rapidly enters jejunum without the benefit of normal digestive process If a pt is getting tube feedings, they might get dumping syndrome Can occur in anyone who had a surgery removing part of the stomach Rapid gastric emptying or sudden influx of hypertonic fluid triggers a shift of fluid into the abdomen as the small intestines pull fluid from the EC space to try to dilute hypertonic fluid Decrease in circulating volume causes vasomotor disturbances Occurs within 10-30 mins after eating
136
S&S of dumping syndrome
Vertigo Tachycardia Syncope Sweating Pallor Palpitation Diarrhea Nausea Weakness, they want to lie down Happens after surgery and during tube feedings (dilute) Symptoms resolve within an hour or from bowel movement Hypoglycemia
137
intestinal manifestation of dumping syndrome
Can occur 2-3 hours after a meal Epigastric fullness Distention of jejunum with food and fluid Abdominal discomfort Cramping Nausea Borborygmi (stomach rumbling)
138
teaching for dumping syndrome
Small feeding High protein and fat Low CHO, fiber Dry diet Provide antispasmodic
139
interventions for dumping syndrome
dry diet low carb (stays in stomach longer) lying down after eating to slow passage high fat and protein low fiber small, frequent meals
140
post-op for dumping syndrome
increased risk of hemorrhage Bile reflux from removal of pylorus Dysphagia Bowel obstruction from adhesions
141
GERD
Backflow of gastric content into esophagus as it goes past a weak or lower LES without belching or vomiting results in esophagitis
142
3 aggressive factors
HCl bile pancreatic enzymes
143
2 protective factors
saliva mucus
144
GERD risk factors
Weight gain Obesity Pregnancy Lying flat after meals Medications (Ca+ channel blockers, BB, high levels of estrogen and progesterone, NSAIDS, stress cause reflux) Hiatal hernia Smoking Weakened LES tone Foods: tomatoes, citrus, spicy Alcohol Caffeine Chocolate Chewing tobacco High fat foods Carbonation Elderly
145
patho of GERD
Change in the pressure zone of gastroesophageal sphincter Normally, high pressure prevents reflux but permits passage of food Displacement of angle of gastroesophageal junction Incompetent LES Inflamed esophageal mucosa Esophagitis from backflow of aggressive factors which puts pts at high risk for esophageal cancer
146
Degree of GERD depends on
Frequency of reflux Contents of reflux Buffering ability of saliva and mucus Rate of gastric emptying
147
GERD clinical manifestations
dyspepsia (moves up and down, relieved with antacid) pain (occurs after activity, supine or distended abdomen makes it worse, radiates to back of neck or jaw and penetrates to back, take nitroglycerin, worse when bending over or recumbent, don't do strenuous exercise after eating, sit after meals, walk) esophageal spasm odynophagia (pain during swallowing) intermittent dysphagia (worse in beginning of meal) acid regurgitation (SOUR AND BITTER) water brash (hypersalivation SALTY) eructation (belching) distended abdomen
148
GERD diagnosis
barium swallow esophagoscopy Esophageal biopsy Cytology (looking at cells) Gastric secretions Acid perfusion tests
149
complications of esophagoscopy
Aspiration Perforation Oversedation Hemorrhage from perforation
150
post op for esophagoscopy
Assess airway if pt not arousable Check VS Check for breathing Check gag reflex! Eating before it returns causes choking
151
med management of mild GERD
Antacids (Al or Mg hydroxide), calcium carbonate Maalox, mylanta (brand names) Increase gastric pH Reduce pepsin activity Buffers/neutralize gastric acid to soothe mucosa Works in 30 min Should be taken AFTER a meal, not before Neutralizing acid that forms after meals Mg can cause diarrhea