Reflux and Esophageal Disease Flashcards

(47 cards)

1
Q

GERD definition

A

sx or mucosal damage produced by the abnormal reflux of gastric contents into the esophagus
Heartburn 2/+ times a week

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2
Q

GERD is

A

a disease

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3
Q

Heartburn is

A

a sx

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4
Q

Esophagitis is

A

an endoscopic finding

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5
Q

What causes aggressive GERD?

A

Gastric acid
Pepsin
Bile acids
Pancreatic enzymes

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6
Q

What causes defensive GERD?

A

Impairment of lower esophageal sphincter pressure

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7
Q

What is the typical lower esophageal sphincter state?

A

contracted

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8
Q

Impairment of LES usually involves what?

A

Transient LES relaxation
Increased abdominal pressure
Atonic LES

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9
Q

What causes increased abdominal pressure

A

Straining
Bending
Coughing
Eating

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10
Q

What causes atonic LES?

A

Fatty foods
Gastric distention
Smoking
Medication

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11
Q

How do hiatal hernias affect LES?

A

The larger the hiatal hernia, the more frequently the patient’s LES will transiently relax allowing acid to flow back into the esophagus

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12
Q

What is the main determinant that causes damage and sx of GERD

A

Length of time acid spends in contact with the esophagus

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13
Q

GERD typical sx

A
Pyrosis (heartburn)
Regurgitation
Belching
Dyspepsia
Epigastric pain & nausea
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14
Q

GERD extraesophageal (atypical) sx

A
Cough
Asthma
Laryngitis
Chest pain
Dental erosions
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15
Q

GERD alarm sx

A
Dysphagia
Odynophagia
Unexplained weight loss
Bleeding
Anemia
Chocking
Continual pain despite standard therapy
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16
Q

Diagnosis of GERD

A

Clinical (most common)
Endoscopy
Ambulatory pH monitoring
Manometry

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17
Q

Complications of GERD

A

Esophagitis
Strictures
Barrett’s esophagus

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18
Q

Barrett’s esophagus

A

Precancerous condition
More frequent/severe sx = increased risk
Lower esophageal tissues begins to look like the stomach
Hx of heartburn and regurgitation
Endoscopy (every 3-5 years) and biopsy for diagnosis

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19
Q

GERD lifestyle interventions

A

Weight reduction
Raising head of the bed
Avoid eating 3 hs before bedtime
Avoid lying down for 3 hours postprandially
Avoid foods and medications that reduce LES pressure
Dietary restriction of fat

20
Q

Drugs that lower LES

A
Anticholinergics
Benzos
DHP CCBs
Estrogens, progesterone
Theophylline
Tetracycline
Narcotics
EtOH
Smoking
21
Q

Foods that lower LES

A
Caffeine
Peppers
Onions
Garlic
Chocolate
Spearmint/peppermint
Coffee, tea, soda
Fatty meals, spicy food
22
Q

Drugs that irritate the esophagus

A
Bisphosphonates
ASA
Fe
NSAIDs
K Cl
23
Q

Foods that irritate the esophagus

A

Tomato juice
Citrus juice
Spicy foods
Coffee

24
Q

Aluminum causes

25
Magnesium causes
diarrhea
26
Antacids change the pH for which drugs that require an acidic environment?
dig phentoin isoniazid Fe
27
Antacids chelate?
Quinolones | Tetracyclines
28
Cimetidine is eliminated how?
Hepatic
29
Famotidine, ranitidine and nizatidine are eliminated how?
Renal
30
Cimetidine inhibits which enzymes?
1A2 2C9 2D6 3A4
31
H2RA SE
CNS (HA, dizziness, fatigue, somnolence, depression, hallucinations) especially in elderly with reduced renal function GI: diarrhea/constipation
32
PPI elimination
Hepatic
33
PPI DDIs
Decreased absorption of azoles
34
Prilosec and nexium inhibit which enzyme?
2C19 - decreases the metabolism of diazepam, phenytoin and warfarin
35
Lansoprazole induces which enzyme?
1A2 - increases metabolism of theophylline
36
Which enzyme are all PPIs metabolized by?
2C19 | 3A4
37
What is protonix metabolized by?
cytosolic sulfotransferase
38
How do PPIs and plavix interact?
Plavix requires 2C19 to be converted to active metabolite
39
Long term effects of PPIs
Reduced calcium absorption and vit b-12 deficiency C diff CAP AKI/CKD Hypomagnesemia Tetany, tremors, seizures, QT prolongation and arrhythmias
40
PPIs in children
Nexium (1 month) Prilosec/Pepcid (1 yr) Protonix (5 yr) Aciphex/Dexilant (12 yrs)
41
Promotility drugs in GERD
Metoclopramide - increases LES pressure and accelerates gastric emptying Bethanechol - promotility Baclofen - decreases the number of transient relaxations of LES
42
Treatment of intermittent, mild heartburn
Lifestyle + - Antacids +/- - OTC H2RA BID or OTC PPI qd
43
Sx relief of GERD
Lifestyle plus Rx: | G2RA bid for 6-12 weeks or PPI qd for 4-8 weeks
44
Treatment of mod-severe sx or healing of erosive esophagitis
Lifestyle + | PPI qd to BID for 4-16 weeks or high dose H2RA bid-qid 8-12 weeks
45
What condition is refractory to PPI therapy
Eosinophilic esophagitis
46
How to diagnose eosinophilic esophagitis
Biopsy
47
Treatment of eosinophilic esophagitis
Dietary exclusions | Inhaled corticosteroids: fluticasone and budesonide - swallowed