Gastroenterology Practice Questions

Q: Which of the following is used to decrease the duration and severity of acute diarrhea?

Zn. ***Zn*** - **Zinc supplementation** has been shown to reduce the **duration** and **severity** of acute diarrhea, particularly in children in developing countries [1]. - It plays a crucial role in **immune function** and **intestinal integrity**, which helps in recovery from diarrheal episodes [1]. *Mg* - **Magnesium** is an essential mineral, but it is not directly used to decrease the duration or severity of acute diarrhea. - In fact, high doses of magnesium can act as a **laxative** and may worsen diarrhea. *Fe* - **Iron** is vital for red blood cell formation and oxygen transport, but it does not directly impact the duration or severity of acute diarrhea. - Iron supplementation is primarily used to treat **anemia**. *Ca* - **Calcium** is important for bone health and various metabolic processes, but it is not a primary intervention for reducing the duration or severity of acute diarrhea. - While sometimes used for mild digestive issues, it does not have the same evidence base as zinc for acute diarrhea.

Q: Child with 10 episodes of diarrhea in last 24 hours with sunken dry eyes, very slow skin pinch, and absent tears. Management is

Administer intravenous Ringer's lactate. ***Administer intravenous Ringer's lactate*** - The child presents with signs of **severe dehydration** (sunken dry eyes, very slow skin pinch, absent tears, 10 episodes of diarrhea), which necessitates **rapid intravenous fluid resuscitation**. - **Ringer's lactate** is an isotonic crystalloid solution that effectively replenishes intravascular volume and corrects electrolyte imbalances, making it the most appropriate initial management for severe dehydration. *Encourage breastfeeding* - While **breastfeeding** is crucial for hydration and nutrition in children with diarrhea, it is insufficient to correct **severe dehydration** rapidly. - This intervention is more suitable for managing **mild to moderate dehydration** or for rehydration after initial stabilization. *Administer 10% dextrose solution* - **10% dextrose solution** is used primarily to correct **hypoglycemia** or provide a source of calories, not for rapid volume expansion in severe dehydration. - Administering hypertonic solutions like 10% dextrose without adequate volume can worsen dehydration or cause electrolyte disturbances. *Provide oral rehydration solution (ORS)* - **Oral rehydration solution (ORS)** is the gold standard for treating **mild to moderate dehydration** and preventing dehydration due to diarrhea. - However, in cases of **severe dehydration**, where the child may be lethargic, vomiting frequently, or have impaired absorption, ORS alone is often insufficient and intravenous fluids are required for initial stabilization.

Q: All of the following is true about congenital hypertrophic pyloric stenosis except which of the following?

Metabolic acidosis occurs. ***Metabolic acidosis occurs*** - This statement is **incorrect** because the persistent vomiting seen in pyloric stenosis typically leads to **metabolic alkalosis**, not acidosis. - The loss of gastric acid (HCl) from vomiting causes a net loss of hydrogen ions, resulting in an elevation of blood pH and bicarbonate levels. *Metabolic alkalosis occurs* - This is a **true** statement about congenital hypertrophic pyloric stenosis. - The characteristic **projectile vomiting** of gastric contents leads to a significant loss of **hydrochloric acid (HCl)** and subsequent **metabolic alkalosis**, often with hypochloremia and hypokalemia. *More common in males* - This is a **true** statement; congenital hypertrophic pyloric stenosis shows a distinct **male predominance**, with a male-to-female ratio of about 4:1. - This difference suggests possible genetic or hormonal influences on its development. *Ramstedt Pyloromyotomy is the treatment of choice* - This is a **true** statement; **Ramstedt Pyloromyotomy** is the definitive surgical treatment for congenital hypertrophic pyloric stenosis. - The procedure involves incising the hypertrophied pyloric muscle, which relieves the obstruction and allows for normal gastric emptying.

Q: A 1-year-old child with multiple episodes of diarrhea presents with sunken dry eyes, depressed fontanelles, and very slow skin pinch. According to WHO guidelines, what is the recommended amount of fluid to be given in the first 6 hours?

900 ml. ***900 ml*** - This child exhibits signs of **severe dehydration** including sunken eyes, dry mucous membranes, depressed fontanelles, and very slow skin pinch. - According to **WHO guidelines for severe dehydration**, the recommended fluid replacement is **100 ml/kg over 6 hours**. - For a typical 1-year-old child weighing approximately **10 kg**, the calculated fluid requirement is 100 ml/kg × 10 kg = **1000 ml over 6 hours**. - Among the given options, **900 ml is the closest** to the WHO-recommended 1000 ml and represents appropriate fluid management for severe dehydration. - The fluid is given as **30 ml/kg in the first hour** (300 ml) and **70 ml/kg over the next 5 hours** (700 ml) for infants under 12 months. *600 ml* - This amount (60 ml/kg for a 10 kg child) is **insufficient for severe dehydration**. - This volume is more appropriate for **moderate dehydration** managed with ORS over 3-4 hours (75 ml/kg). - Inadequate fluid replacement in severe dehydration can lead to **hypovolemic shock**, persistent acidosis, and organ failure. *1200 ml* - This amount (120 ml/kg) **exceeds WHO recommendations** by 20% and risks **fluid overload**. - Over-rapid or excessive fluid administration can cause complications including **pulmonary edema**, **cerebral edema**, and **heart failure**, especially in malnourished children. - WHO guidelines are evidence-based and already account for adequate resuscitation; exceeding these volumes is not recommended. *1500 ml* - This is an **excessive amount** (150 ml/kg) that significantly exceeds WHO guidelines and carries high risk of **fluid overload**. - Such volumes can lead to **acute pulmonary edema**, **congestive heart failure**, and **dilutional hyponatremia**. - There is no indication for such aggressive fluid administration in standard severe dehydration management.

Q: The most common cause of per rectal bleeding in infants is:

Anal fissure. ***Anal fissure*** - **Anal fissures** are tiny tears in the **anus** lining, causing bright red blood on the stool surface or diaper. - They are very common in infants due to **constipation** or passing **hard stools**, leading to trauma. *Rectal polyp* - Rectal polyps can cause **painless rectal bleeding**, but they are **less common** than anal fissures in infants. - Bleeding from polyps is usually **intermittent** and can be darker or mixed with stool. *Intussusception* - Intussusception presents with sudden onset of **crampy abdominal pain**, **vomiting**, and **currant jelly stools** (blood mixed with mucus). - This condition is an **emergency** and typically affects infants between 3 months and 3 years old. *Meckel's diverticulum* - **Meckel's diverticulum** can cause painless, recurrent **dark red or maroon bleeding**, often described as "brick-red" due to ectopic gastric mucosa. - While a significant cause of bleeding, it is **less common** than anal fissures as the primary etiology in infants.

Q: What is the most common differential diagnosis for appendicitis in children?

Mesenteric lymphadenitis. ***Mesenteric lymphadenitis*** - **Mesenteric lymphadenitis** commonly mimics appendicitis in children due to similar symptoms like **abdominal pain**, **fever**, and **vomiting**. - It often follows a **viral infection** and causes enlarged lymph nodes in the mesentery, leading to pain in the **right lower quadrant**. *Gastroenteritis* - While gastroenteritis also causes **abdominal pain**, **vomiting**, and often **diarrhea**, the pain is usually more generalized or diffuse, unlike the localized **right lower quadrant pain** of appendicitis. - Furthermore, patients with gastroenteritis typically do not present with the progressive, worsening pain characteristic of appendicitis. *Intussusception* - Intussusception usually presents with sudden onset of **crampy, intermittent abdominal pain** and **currant jelly stools** in younger children (typically 3 months to 3 years), which is distinct from appendicitis pain. - A palpable **sausage-shaped mass** in the abdomen can also be a key diagnostic feature, rarely seen in appendicitis. *Meckel's diverticulitis* - **Meckel's diverticulitis** can mimic appendicitis very closely in its presentation of **right lower quadrant pain** and inflammation. - However, it is a less common condition than mesenteric lymphadenitis and appendicitis itself, making it a differential rather than the **most common differential diagnosis**.

Q: Most common age for intussusception is

6 months - 3 years. ***6 months - 3 years*** - Intussusception commonly occurs in infants and young children, with the peak incidence between **6 months and 3 years** of age. - This age range coincides with changes in feeding practices and increased exposure to viral infections, which can sometimes precede intussusception. - The **typical age** is 5-9 months, with most cases occurring before 2 years. *0 - 6 months* - While intussusception can occur in this age group, it is **less common** than in slightly older infants. - Intussusception in very young infants may have different underlying causes, such as a **pathologic lead point**. *3 - 5 years* - Intussusception is **less frequent** in this age group compared to infants and toddlers. - When it does occur, there is a higher likelihood of an **identifiable lead point**, such as a Meckel's diverticulum or polyp. *> 5 years* - Intussusception is **rare** in children over the age of 5 years. - In older children and adults, it is almost always associated with a **pathological lead point**, such as a tumor or postoperative adhesions.

Q: Which of the following is NOT a symptom of mild dehydration?

Normal BP. ***Normal BP*** - In **mild dehydration**, the body's compensatory mechanisms, such as increased heart rate and vasoconstriction, typically manage to maintain a **normal blood pressure**. [1] - A significant drop in **blood pressure** (hypotension) is usually indicative of **moderate to severe dehydration**, where these compensatory mechanisms begin to fail. [2] *Thirst* - **Thirst** is one of the **earliest and most reliable** indicators of dehydration, as the body signals a need for fluid intake. [3] - It arises in response to increased plasma osmolality and decreased blood volume, both occurring even in **mild dehydration**. [3] *Restlessness* - **Restlessness** can be an early sign of discomfort and altered mental status associated with **mild dehydration**, particularly in infants and young children. - As the body struggles to maintain fluid balance, individuals may experience irritability and general unease. *Dry tongue* - A **dry tongue** and **dry sticky mucous membranes** are common signs of mild to moderate dehydration. - This symptom results from reduced salivary production due to decreased fluid volume in the body.

Q: What is the total amount of Oral Rehydration Solution (ORS) required during the first 4 hours for a 20 kg child?

1200-2000 ml. ***1200-2000 ml*** - According to **WHO ORS Guidelines (Plan B)**, for a child with **some dehydration**, the recommended ORS amount during the first 4 hours is **75 ml/kg**. - For a 20 kg child: 20 kg × 75 ml/kg = **1500 ml**. - This falls within the range of **1200-2000 ml**, making this the correct answer. - This guideline applies to children with **some dehydration** who are alert and able to drink. *2000-2200 ml* - This range is **excessive** for a 20 kg child and could lead to **fluid overload**. - This amount would be appropriate for a child weighing approximately **27-29 kg** using the 75 ml/kg guideline. - Administering this volume could result in **hypernatremia** or fluid overload complications. *400-600 ml* - This amount is **grossly insufficient** for rehydrating a 20 kg child with some dehydration over 4 hours. - This range represents only **20-30 ml/kg**, which is far below the WHO-recommended **75 ml/kg**. - This volume might be suitable for a **5-8 kg infant** or for maintenance therapy only. *600-800 ml* - This range is also **insufficient** for adequate rehydration of a 20 kg child. - This represents only **30-40 ml/kg**, which is about **half** the recommended amount. - This volume would be appropriate for a child weighing approximately **8-11 kg** using the 75 ml/kg guideline.

Q: A 24-day-old neonate presents with projectile vomiting and failure to gain weight. What is the most likely diagnosis?

Congenital Hypertrophic Pyloric Stenosis. ***Congenital Hypertrophic Pyloric Stenosis*** - The classic presentation includes **projectile, non-bilious vomiting** in a neonate around 2-8 weeks old, leading to **failure to thrive**. - An **olive-shaped mass** (hypertrophied pylorus) may be palpable in the epigastrium. *NEC* - **Necrotizing enterocolitis (NEC)** is an inflammatory disease of the intestine, primarily affecting premature infants. - Symptoms typically include **abdominal distension**, bloody stools, and lethargy, rather than projectile vomiting. *Duodenal atresia* - Presents with **bilious vomiting** within the first 24-48 hours of life due to an obstruction below the ampulla of Vater. - An X-ray would show a **"double bubble" sign**, which is not implied by the provided symptoms. *Hirschsprung's disease* - Characterized by **failure to pass meconium** within the first 24-48 hours and chronic constipation. - Vomiting, if present, is usually **bilious** and associated with abdominal distension, not projectile in nature.

Question 1

Which of the following is used to decrease the duration and severity of acute diarrhea?

Accepted Answer

Zn

Answer

Mg

Answer

Fe

Answer

Ca

Question 2

Child with 10 episodes of diarrhea in last 24 hours with sunken dry eyes, very slow skin pinch, and absent tears. Management is

Accepted Answer

Administer intravenous Ringer's lactate

Answer

Administer 10% dextrose solution

Answer

Encourage breastfeeding

Answer

Provide oral rehydration solution (ORS)

Question 3

All of the following is true about congenital hypertrophic pyloric stenosis except which of the following?

Accepted Answer

Metabolic acidosis occurs

Answer

Metabolic alkalosis occurs

Answer

More common in males

Answer

Ramstedt Pyloromyotomy is the treatment of choice

Question 4

A 1-year-old child with multiple episodes of diarrhea presents with sunken dry eyes, depressed fontanelles, and very slow skin pinch. According to WHO guidelines, what is the recommended amount of fluid to be given in the first 6 hours?

Accepted Answer

900 ml

Answer

600 ml

Answer

1200 ml

Answer

1500 ml

Question 5

The most common cause of per rectal bleeding in infants is:

Accepted Answer

Anal fissure

Answer

Rectal polyp

Answer

Intussusception

Answer

Meckel's diverticulum

Question 6

What is the most common differential diagnosis for appendicitis in children?

Accepted Answer

Mesenteric lymphadenitis

Answer

Intussusception

Answer

Meckel's diverticulitis

Answer

Gastroenteritis

Question 7

Most common age for intussusception is

Accepted Answer

6 months - 3 years

Answer

0 - 6 months

Answer

3 - 5 years

Answer

> 5 years

Question 8

Which of the following is NOT a symptom of mild dehydration?

Accepted Answer

Normal BP

Answer

Thirst

Answer

Restlessness

Answer

Dry tongue

Question 9

What is the total amount of Oral Rehydration Solution (ORS) required during the first 4 hours for a 20 kg child?

Accepted Answer

1200-2000 ml

Answer

2000-2200 ml

Answer

400-600 ml

Answer

600-800 ml

Question 10

A 24-day-old neonate presents with projectile vomiting and failure to gain weight. What is the most likely diagnosis?

Accepted Answer

Congenital Hypertrophic Pyloric Stenosis

Answer

NEC

Answer

Duodenal atresia

Answer

Hirschsprung's disease

Gastroenterology — MCQs

Gastroenterology — MCQs

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