lOMoAR cPSD| 67691079
Alterations in the Gastrointestinal System
Gastrointestinal Reflux Disease
Introduction to Gastroesophageal Reflux Disease
Gastroesophageal reflux disease is a chronic condition that affects persons of all ages and causes
irritation of the lining of the esophagus. If left untreated, many complications can occur.
This learning module focuses on disease processes associated with gastroesophageal reflux
disease and enables you to meet the following course outcomes:
• CO 1: Analyze pathophysiologic mechanisms associated with selected disease states across
the lifespan.
• CO 2: Examine the way in which homeostatic, adaptive, and compensatory physiological
mechanisms can be supported and/or altered through specific therapeutic interventions
across the lifespan.
• CO 3: Distinguish risk factors associated with selected disease states across the lifespan.
• CO 4: Integrate advanced pathophysiological concepts in the diagnosis and treatment of
health problems in selected populations.
Pathophysiology of Gastroesophageal Reflux
Disease
The nurse practitioner (NP) diagnoses a client with gastroesophageal reflux disease (GERD). The
NP explains to the client that the condition is caused by which of the following?
Loss of muscle tone at the lower esophageal sphincter
Increased production of bile in the stomach
Reverse peristalsis of the stomach
Excessive salivation and swallowing
Gastroesophageal reflux disease (GERD) is commonly associated with the loss of muscle tone at
the lower esophageal sphincter (LES). The LES is a muscular ring that separates the esophagus
from the stomach, and its relaxation or incompetence can lead to the backward flow of stomach
contents into the esophagus, causing the symptoms characteristic of GERD, such as heartburn and
regurgitation.
messages.downloaded_by PERFORMANCE
, lOMoAR cPSD| 67691079
Reverse peristalsis, where the stomach contracts in the opposite direction of normal peristalsis, is
not a typical mechanism associated with GERD.
Excessive salivation and swallowing do not typically cause GERD. In fact, swallowing can help clear
refluxed material from the esophagus.
GERD is more related to issues with the LES and the reflux of acidic stomach contents into the
esophagus than the increased production of bile.
Factors Affecting Gastric Emptying
Complete the following sentences by choosing from the list of options.
When an individual consumes a very large meal, the nurse practitioner (NP) knows the gastric
emptying rate will be (increased, decreased, or unchanged). When an individual receives a
hypertonic gastric tube feeding solution, the NP knows the gastric emptying rate will be
(increased, decreased, or unchanged).
Larger volumes of gastric contents generally increase gastric pressure, stimulating peristalsis and
promoting a faster rate of gastric
emptying. Hypertonic solutions, having a higher osmotic pressure than the surrounding tissues,
tend to delay gastric emptying.
Risk Factors for Gastroesophageal Reflux Disease
The nurse practitioner (NP) evaluates a client with complaints of a burning sensation in the chest
that often occurs after meals and is exacerbated when lying down. Which of the following findings
should the NP recognize as risk factors for gastroesophageal reflux disease (GERD)? Select all that
apply.
Body mass index (BMI) of 32
Takes aspirin daily for coronary artery disease
Has a sliding hiatal hernia
Smokes 1 pack of cigarettes per day
Drinks three cups of chamomile tea daily
Increased body mass index (BMI), especially in the overweight or obese range, is a recognized risk
factor for gastroesophageal reflux disease (GERD). Increased abdominal pressure due to excess
weight can contribute to the reflux of stomach contents into the esophagus. Smoking is a known
risk factor for GERD. Smoking can weaken the lower esophageal sphincter, which contributes to
the development or exacerbation of GERD symptoms. Hiatal hernias, especially sliding hiatal
hernias, are associated with GERD. The herniation of the stomach through the diaphragmatic
opening can disrupt the normal anatomical barrier, allowing gastric acid to flow back into the
esophagus and causing symptoms such as heartburn.
, lOMoAR cPSD| 67691079
While aspirin use is associated with an increased risk of gastrointestinal issues such as ulcers, it is
not a direct risk factor for GERD. Drinking chamomile tea is not recognized as a risk factor for
GERD. It is often considered soothing and may have mild anti-inflammatory properties.
Normal Physiology of the Gastrointestinal Tract
The gastrointestinal (GI) tract includes the mouth, esophagus, stomach, small intestine, large
intestine, rectum, and anus.
The digestive system is responsible for breaking down ingested food, facilitating nutrient
absorption, maintaining body water, and eliminating waste. Hormones and the autonomic
nervous system regulate most digestive activities, including the release of hormones that
stimulate or inhibit gastric motility and the secretion of substances that aid in digestion.
Examine the image to learn more about digestive hormones.
Normal Physiology of Gastric Emptying
The rate of gastric emptying is influenced by factors such as volume, osmotic pressure, and
chemical composition of gastric contents. Larger volumes of gastric contents generally increase
gastric pressure, stimulating peristalsis and promoting a faster rate of gastric emptying.
messages.downloaded_by PERFORMANCE
, lOMoAR cPSD| 67691079
Osmotic pressure refers to the concentration of solutes in gastric contents. Both hypertonic and
hypotonic solutions can slow gastric emptying. Ingestion of solids and fat takes longer to digest
and break down, which causes a slower rate of gastric emptying.
Pathophysiology of Gastroesophageal Reflux
Disease
Gastroesophageal reflux (GER) occurs when stomach acid or bile flows into the esophagus, leading
to the development of esophagitis. Gastroesophageal reflux disease (GERD) is diagnosed when
GER is chronic, more severe, and causes complications over time. GERD is caused by abnormalities
in the lower esophageal sphincter function, esophageal motility, or gastric emptying.
Click each section below to learn more about GER pathophysiology.
Lower Esophageal Sphincter Function
Normally, the lower esophageal sphincter is a one-way valve that keeps gastric contents from
coming up into the esophagus. However, decreased tone of the lower esophageal sphincter allows
acidic stomach contents to regurgitate into the esophagus. Esophageal Motility
Abnormalities in esophageal motility can disrupt the coordinated contractions that propel food
downward into the stomach. Disruption of coordinated contractions can cause delayed gastric
emptying.
Delayed Gastric Emptying
Delayed gastric emptying contributes to esophagitis by extending the period during which reflux
can occur and increasing the acid content of chyme.
Alterations in the Gastrointestinal System
Gastrointestinal Reflux Disease
Introduction to Gastroesophageal Reflux Disease
Gastroesophageal reflux disease is a chronic condition that affects persons of all ages and causes
irritation of the lining of the esophagus. If left untreated, many complications can occur.
This learning module focuses on disease processes associated with gastroesophageal reflux
disease and enables you to meet the following course outcomes:
• CO 1: Analyze pathophysiologic mechanisms associated with selected disease states across
the lifespan.
• CO 2: Examine the way in which homeostatic, adaptive, and compensatory physiological
mechanisms can be supported and/or altered through specific therapeutic interventions
across the lifespan.
• CO 3: Distinguish risk factors associated with selected disease states across the lifespan.
• CO 4: Integrate advanced pathophysiological concepts in the diagnosis and treatment of
health problems in selected populations.
Pathophysiology of Gastroesophageal Reflux
Disease
The nurse practitioner (NP) diagnoses a client with gastroesophageal reflux disease (GERD). The
NP explains to the client that the condition is caused by which of the following?
Loss of muscle tone at the lower esophageal sphincter
Increased production of bile in the stomach
Reverse peristalsis of the stomach
Excessive salivation and swallowing
Gastroesophageal reflux disease (GERD) is commonly associated with the loss of muscle tone at
the lower esophageal sphincter (LES). The LES is a muscular ring that separates the esophagus
from the stomach, and its relaxation or incompetence can lead to the backward flow of stomach
contents into the esophagus, causing the symptoms characteristic of GERD, such as heartburn and
regurgitation.
messages.downloaded_by PERFORMANCE
, lOMoAR cPSD| 67691079
Reverse peristalsis, where the stomach contracts in the opposite direction of normal peristalsis, is
not a typical mechanism associated with GERD.
Excessive salivation and swallowing do not typically cause GERD. In fact, swallowing can help clear
refluxed material from the esophagus.
GERD is more related to issues with the LES and the reflux of acidic stomach contents into the
esophagus than the increased production of bile.
Factors Affecting Gastric Emptying
Complete the following sentences by choosing from the list of options.
When an individual consumes a very large meal, the nurse practitioner (NP) knows the gastric
emptying rate will be (increased, decreased, or unchanged). When an individual receives a
hypertonic gastric tube feeding solution, the NP knows the gastric emptying rate will be
(increased, decreased, or unchanged).
Larger volumes of gastric contents generally increase gastric pressure, stimulating peristalsis and
promoting a faster rate of gastric
emptying. Hypertonic solutions, having a higher osmotic pressure than the surrounding tissues,
tend to delay gastric emptying.
Risk Factors for Gastroesophageal Reflux Disease
The nurse practitioner (NP) evaluates a client with complaints of a burning sensation in the chest
that often occurs after meals and is exacerbated when lying down. Which of the following findings
should the NP recognize as risk factors for gastroesophageal reflux disease (GERD)? Select all that
apply.
Body mass index (BMI) of 32
Takes aspirin daily for coronary artery disease
Has a sliding hiatal hernia
Smokes 1 pack of cigarettes per day
Drinks three cups of chamomile tea daily
Increased body mass index (BMI), especially in the overweight or obese range, is a recognized risk
factor for gastroesophageal reflux disease (GERD). Increased abdominal pressure due to excess
weight can contribute to the reflux of stomach contents into the esophagus. Smoking is a known
risk factor for GERD. Smoking can weaken the lower esophageal sphincter, which contributes to
the development or exacerbation of GERD symptoms. Hiatal hernias, especially sliding hiatal
hernias, are associated with GERD. The herniation of the stomach through the diaphragmatic
opening can disrupt the normal anatomical barrier, allowing gastric acid to flow back into the
esophagus and causing symptoms such as heartburn.
, lOMoAR cPSD| 67691079
While aspirin use is associated with an increased risk of gastrointestinal issues such as ulcers, it is
not a direct risk factor for GERD. Drinking chamomile tea is not recognized as a risk factor for
GERD. It is often considered soothing and may have mild anti-inflammatory properties.
Normal Physiology of the Gastrointestinal Tract
The gastrointestinal (GI) tract includes the mouth, esophagus, stomach, small intestine, large
intestine, rectum, and anus.
The digestive system is responsible for breaking down ingested food, facilitating nutrient
absorption, maintaining body water, and eliminating waste. Hormones and the autonomic
nervous system regulate most digestive activities, including the release of hormones that
stimulate or inhibit gastric motility and the secretion of substances that aid in digestion.
Examine the image to learn more about digestive hormones.
Normal Physiology of Gastric Emptying
The rate of gastric emptying is influenced by factors such as volume, osmotic pressure, and
chemical composition of gastric contents. Larger volumes of gastric contents generally increase
gastric pressure, stimulating peristalsis and promoting a faster rate of gastric emptying.
messages.downloaded_by PERFORMANCE
, lOMoAR cPSD| 67691079
Osmotic pressure refers to the concentration of solutes in gastric contents. Both hypertonic and
hypotonic solutions can slow gastric emptying. Ingestion of solids and fat takes longer to digest
and break down, which causes a slower rate of gastric emptying.
Pathophysiology of Gastroesophageal Reflux
Disease
Gastroesophageal reflux (GER) occurs when stomach acid or bile flows into the esophagus, leading
to the development of esophagitis. Gastroesophageal reflux disease (GERD) is diagnosed when
GER is chronic, more severe, and causes complications over time. GERD is caused by abnormalities
in the lower esophageal sphincter function, esophageal motility, or gastric emptying.
Click each section below to learn more about GER pathophysiology.
Lower Esophageal Sphincter Function
Normally, the lower esophageal sphincter is a one-way valve that keeps gastric contents from
coming up into the esophagus. However, decreased tone of the lower esophageal sphincter allows
acidic stomach contents to regurgitate into the esophagus. Esophageal Motility
Abnormalities in esophageal motility can disrupt the coordinated contractions that propel food
downward into the stomach. Disruption of coordinated contractions can cause delayed gastric
emptying.
Delayed Gastric Emptying
Delayed gastric emptying contributes to esophagitis by extending the period during which reflux
can occur and increasing the acid content of chyme.
