Gastrointestinal Bleeding — MCQs
Massive colonic bleeding in a patient with diverticulosis is most likely from which artery?
A patient presents with hematemesis and is diagnosed with esophageal varices. What is the first line of treatment?
All of the following are causes of lower gastrointestinal bleeding, EXCEPT:
A 45-year-old male presents with hematemesis and melena. He is hemodynamically stable. What is the most appropriate initial diagnostic test?
What is the drug of choice for bleeding oesophageal varices?
True statement regarding upper GI bleeds:
A 45 year old lawyer presents with pain in the abdomen more so in the epigastric region that worsens with eating spicy food and is relieved by bending forward. Complications of the above mentioned condition could be all except:
Which of the following is the most common adverse effect of omeprazole?
Which of the following is a complication of gallstones?
Which of the following statements regarding peptic ulcers are correct? 1. Duodenal ulcers are more common as compared to gastric ulcers. 2. Helicobacter pylori and NSAIDs are most common causative agents. 3. Bleeding is the most common complication associated with posterior duodenal ulcer.
Gastrointestinal Bleeding Indian Medical PG Practice Questions and MCQs
Question 1: Massive colonic bleeding in a patient with diverticulosis is most likely from which artery?
- A. Superior mesenteric artery (Correct Answer)
- B. Inferior mesenteric artery
- C. Celiac artery
- D. Gastro-duodenal artery
Explanation: ***Superior mesenteric artery*** - The **superior mesenteric artery** supplies the **right colon** (cecum, ascending colon, and proximal transverse colon), which is the **most common site of diverticular bleeding**. - Although **diverticula are more common in the left colon**, **50-90% of diverticular bleeding** occurs from **right-sided diverticula**. - Right-sided diverticula tend to have a **wider neck and thinner wall**, making the penetrating vasa recta more vulnerable to injury and bleeding. - This is a classic teaching point: **diverticula are more common on the left, but bleeding is more common from the right**. *Inferior mesenteric artery* - The **inferior mesenteric artery** supplies the **left colon** (descending colon, sigmoid colon, and upper rectum), where **diverticula are most prevalent**. - While left-sided diverticulosis is more common, these diverticula **bleed less frequently** than right-sided diverticula. - Left-sided diverticular disease more commonly presents with **diverticulitis** rather than massive bleeding. *Celiac artery* - The **celiac artery** supplies the **foregut** organs, including the stomach, liver, spleen, and pancreas. - It does **not supply the colon** and therefore cannot be the source of colonic diverticular bleeding. *Gastro-duodenal artery* - The **gastroduodenal artery** is a branch of the **common hepatic artery** (from the celiac trunk) that supplies the **duodenum and pancreas**. - It is associated with **upper gastrointestinal bleeding** (e.g., from posterior duodenal ulcers) but has no role in colonic bleeding.
Question 2: A patient presents with hematemesis and is diagnosed with esophageal varices. What is the first line of treatment?
- A. Surgery
- B. Steroid therapy
- C. Endoscopic banding (Correct Answer)
- D. Proton pump inhibitors
Explanation: ***Endoscopic banding*** - **Endoscopic variceal ligation (EVL)**, or banding, is the **first-line treatment** for acute variceal bleeding [1]. - It involves placing elastic bands over the varices to **occlude blood flow** and prevent further hemorrhage [1]. *Surgery* - **Surgical shunting procedures** or **liver transplantation** are generally reserved for patients who fail endoscopic and pharmacologic therapies [1]. - These are **invasive options** with significant risks and are not considered first-line for acute bleeding. *Steroid therapy* - **Steroids** are typically used as **anti-inflammatory agents** and are not indicated for controlling bleeding from esophageal varices. - Their use would have **no direct impact** on stopping the hemorrhage. *Proton pump inhibitors* - **Proton pump inhibitors (PPIs)** are used to **reduce gastric acid production**, which is beneficial in conditions like peptic ulcer disease or reflux esophagitis [2]. - They are **not effective** in treating or preventing bleeding from esophageal varices, as the bleeding source is venous [2].
Question 3: All of the following are causes of lower gastrointestinal bleeding, EXCEPT:
- A. Peptic ulcer disease (Correct Answer)
- B. Angiodysplasia
- C. Colorectal cancer
- D. Diverticulosis
Explanation: ***Peptic ulcer disease*** - **Peptic ulcer disease** is a common cause of **upper gastrointestinal bleeding** because ulcers typically form in the stomach or duodenum [1]. - Bleeding from a peptic ulcer would usually manifest as **hematemesis** (vomiting blood) or **melena** (black, tarry stools) due to the digestion of blood in the upper GI tract, rather than bright red blood per rectum [2]. *Angiodysplasia* - **Angiodysplasia** involves dilated, fragile blood vessels in the GI tract, most commonly in the **right colon**, and is a significant cause of lower GI bleeding [3]. - It often leads to intermittent, painless bleeding, which can range from **occult blood loss** to frank hematochezia. *Colorectal cancer* - **Colorectal cancer** can cause lower GI bleeding due to the **fragile and ulcerated surface** of the tumor [3]. - Bleeding can be chronic and insidious, leading to **iron deficiency anemia**, or acute, presenting as visible blood in the stool [3]. *Diverticulosis* - **Diverticulosis** involves the presence of small, bulging pouches (diverticula) in the colon wall, and bleeding occurs when a **blood vessel** within the diverticulum erodes. - This is a very common cause of **painless, acute, and often massive lower GI bleeding** in older adults.
Question 4: A 45-year-old male presents with hematemesis and melena. He is hemodynamically stable. What is the most appropriate initial diagnostic test?
- A. Colonoscopy
- B. Abdominal ultrasound
- C. Upper endoscopy (Correct Answer)
- D. CT scan of the abdomen
Explanation: ***Upper endoscopy*** - **Hematemesis** (vomiting blood) and **melena** (black, tarry stools) are classic signs of an **upper gastrointestinal bleed** [1]. - **Upper endoscopy** allows direct visualization of the esophagus, stomach, and duodenum to identify the bleeding source (e.g., ulcers, varices) and potentially provide therapeutic intervention [2]. *Colonoscopy* - This procedure is used to visualize the **lower gastrointestinal tract** (colon and rectum). - While melena can sometimes originate from the small bowel or right colon, hematemesis strongly points to an upper GI source, making colonoscopy an inappropriate initial diagnostic choice. *Abdominal ultrasound* - An **abdominal ultrasound** is excellent for evaluating solid organs (e.g., liver, gallbladder, kidneys) and detecting fluid collections. - It does not directly visualize the GI mucosa or lumen to identify the source of active bleeding. *CT scan of the abdomen* - A **CT scan of the abdomen** can identify gross pathologies and sometimes show active bleeding, but it is less sensitive for mucosal lesions and does not allow for direct therapeutic intervention. - It is generally reserved for cases where endoscopy is inconclusive or contraindicated, or when there is suspicion of a mass or perforation.
Question 5: What is the drug of choice for bleeding oesophageal varices?
- A. Ethanolamine oleate
- B. Octreotide (Correct Answer)
- C. Propanolol
- D. Phytonadione
Explanation: ***Octreotide*** - **Octreotide** is an analogue of **somatostatin** that reduces splanchnic blood flow and portal pressure, thereby decreasing bleeding from esophageal varices. - It is often used in the acute management of **bleeding esophageal varices** due to its rapid onset of action and favorable safety profile. *Ethanolamine oleate* - **Ethanolamine oleate** is a **sclerosing agent** used for endoscopic sclerotherapy of esophageal varices, not typically as the initial drug of choice for acute bleeding [1]. - It acts by causing inflammation and fibrosis of the varices, which can be effective but carries risks such as **esophageal ulceration** or perforation. *Propranolol* - **Propranolol** is a **non-selective beta-blocker** used for the prophylactic prevention of variceal bleeding, not for acute management of active bleeding. - It works by reducing portal venous pressure by decreasing cardiac output and splanchnic vasoconstriction. *Phytonadione* - **Phytonadione** (vitamin K1) is used to reverse **coumarin anticoagulant effects** or to treat **vitamin K deficiency**, which can contribute to bleeding but is not a direct treatment for variceal bleeding itself. - It helps in the synthesis of **coagulation factors II, VII, IX, and X**, thereby improving clotting.
Question 6: True statement regarding upper GI bleeds:
- A. Upper GI bleeding is defined as bleeding originating proximal to the ampulla of Vater, not the ligament of Treitz
- B. Endoscopic banding is the first-line treatment for all types of upper GI bleeding
- C. The most common cause of upper GI bleeds is peptic ulcer disease, not variceal bleeding. (Correct Answer)
- D. Rockall score is primarily used for immediate treatment decisions rather than risk stratification
Explanation: ***The most common cause of upper GI bleeds is peptic ulcer disease, not variceal bleeding.*** [1] * **Peptic ulcer disease (PUD)**, particularly **duodenal and gastric ulcers**, accounts for the majority of upper GI bleeding cases. * While **variceal bleeding** is severe and life-threatening, it is a less frequent cause overall compared to PUD. *Endoscopic banding is the first-line treatment for all types of upper GI bleeding* * **Endoscopic banding** is primarily indicated and highly effective for **esophageal variceal bleeding**, not for all types of upper GI bleeds. * For non-variceal bleeding, such as **peptic ulcers**, treatments like **epinephrine injection**, **heater probe**, or **clips** are more commonly utilized [1]. *Upper GI bleeding is defined as bleeding originating proximal to the ampulla of Vater, not the ligament of Treitz* * **Upper GI bleeding** is classically defined as bleeding occurring **proximal to the ligament of Treitz**, which marks the anatomical division between the duodenum and the jejunum. * The **ampulla of Vater** is located in the second part of the duodenum, and bleeding upstream of this point is still considered upper GI bleed. *Rockall score is primarily used for immediate treatment decisions rather than risk stratification* * The **Rockall score** is a validated tool specifically designed for **risk stratification** in upper GI bleeding, predicting rebleeding and mortality [1]. * While it informs overall management, immediate treatment decisions are often guided by the patient's **hemodynamic stability** and endoscopic findings, rather than solely by the score.
Question 7: A 45 year old lawyer presents with pain in the abdomen more so in the epigastric region that worsens with eating spicy food and is relieved by bending forward. Complications of the above mentioned condition could be all except:
- A. Splenic Vein Thrombosis (Correct Answer)
- B. Bleeding
- C. Gastric Outlet Obstruction
- D. Perforation
Explanation: ***Splenic Vein Thrombosis*** - The patient's symptoms (epigastric pain worsening with spicy food, relieved by bending forward) are highly suggestive of **pancreatitis**, not peptic ulcer disease [1]. **Splenic vein thrombosis** is a known complication of chronic pancreatitis due to inflammation and compression of the splenic vein [2]. - While pancreatitis can cause significant morbidity, **splenic vein thrombosis** is a specific vascular complication associated with prolonged inflammation of the pancreas, leading to localized portal hypertension and potentially isolated gastric varices. *Perforation* - **Perforation** (specifically of a peptic ulcer or potentially surrounding bowel in severe pancreatitis) is a severe complication that can occur in conditions causing abdominal pain, but it is not the *exception* among the given options for the likely underlying condition indicated by the patient's symptoms (pancreatitis) [3]. - This complication typically leads to **peritonitis**, a medical emergency requiring immediate surgical intervention [3]. *Bleeding* - **Bleeding** (e.g., from a pancreatic pseudocyst rupturing into the gastrointestinal tract or from localized varices secondary to portal hypertension in pancreatitis) is a recognized complication of the patient's likely underlying condition [1]. - Gastrointestinal bleeding can also result from **gastric erosions** or ulcers exacerbated by ongoing inflammation. *Gastric Outlet Obstruction* - **Gastric outlet obstruction** can occur as a complication of severe or chronic pancreatitis, often due to **inflammation**, **fibrosis**, or **pseudocyst formation** compressing the duodenum [1]. - This typically presents with **postprandial vomiting** and early satiety, which can arise in the context of chronic pancreatic inflammation.
Question 8: Which of the following is the most common adverse effect of omeprazole?
- A. Headache (Correct Answer)
- B. Constipation
- C. Liver dysfunction
- D. Upper gastrointestinal bleeding
Explanation: ***Headache*** - **Headache** is the most frequently reported adverse effect of omeprazole and other proton pump inhibitors (PPIs), occurring in approximately 2-7% of patients. - While generally mild and self-limiting, it is the most common reason for patients to report side effects during PPI therapy. - Other common adverse effects include diarrhea, nausea, and abdominal pain, but headache remains the most prevalent. *Constipation* - Constipation can occur with omeprazole use, but it is less common than headache or diarrhea. - Gastrointestinal side effects like constipation typically occur in a smaller proportion of patients compared to headache. *Liver dysfunction* - Mild **transient elevation of liver enzymes** can occur with omeprazole, but clinically significant liver dysfunction is rare. - Routine monitoring of liver function is generally not required unless there is pre-existing hepatic impairment. *Upper gastrointestinal bleeding* - Omeprazole is used to **treat and prevent** upper gastrointestinal bleeding by reducing gastric acid secretion in conditions like peptic ulcers and erosive esophagitis. - It is a therapeutic agent for this condition, not a causative factor.
Question 9: Which of the following is a complication of gallstones?
- A. Cholangitis (Correct Answer)
- B. Acute pancreatitis
- C. Hemobilia
- D. Biliary enteric fistula
Explanation: ***Cholangitis*** [2] - **Cholangitis** refers to an infection of the **biliary tree**, most commonly caused by obstruction of the bile ducts by gallstones, leading to bacterial overgrowth. [2] - The obstruction (often due to choledocholithiasis) allows bacteria from the duodenum to ascend into the biliary system, causing inflammation and infection. *Hemobilia* - **Hemobilia** is bleeding into the **biliary tract**, typically caused by trauma, iatrogenic injury (e.g., biopsy), or vascular anomalies, not directly from gallstones. - While gallstones can cause inflammation, they do not typically lead to the direct arterial or venous bleeding characteristic of hemobilia. *Acute pancreatitis* [1] - **Acute pancreatitis** can be caused by gallstones if a stone temporarily obstructs the **ampulla of Vater**, blocking both the common bile duct and the pancreatic duct. [1] - However, it's considered a complication of **choledocholithiasis** (gallstones in the common bile duct), not a direct complication of gallstones themselves. *Biliary enteric fistula* [1] - **Biliary enteric fistula** is an abnormal connection between the biliary tree and the gastrointestinal tract, usually caused by chronic inflammation and erosion by a gallstone (e.g., a **gallstone ileus**). [1] - While a direct complication of gallstones, the question asks for *a* complication, and cholangitis is a more immediate and common infectious complication directly arising from biliary obstruction.
Question 10: Which of the following statements regarding peptic ulcers are correct? 1. Duodenal ulcers are more common as compared to gastric ulcers. 2. Helicobacter pylori and NSAIDs are most common causative agents. 3. Bleeding is the most common complication associated with posterior duodenal ulcer.
- A. 2 and 3 only
- B. 1, 2 and 3
- C. 1 and 2 only (Correct Answer)
- D. 1 and 3 only
Explanation: ***1 and 2 only*** - **Duodenal ulcers** are significantly more common than gastric ulcers, with a ratio of about 4:1 [1]. - The two primary causes of peptic ulcers are infection with **_Helicobacter pylori_** and the use of **non-steroidal anti-inflammatory drugs (NSAIDs)** [1]. *2 and 3 only* - While _**H. pylori**_ and **NSAIDs** are indeed the most common causes, the statement incorrectly assumes that bleeding is the most common complication associated with **posterior duodenal ulcers**, when the most common complication of all peptic ulcers is **hemorrhage** but it is more specifically associated with posterior duodenal ulcers due to proximity to the **gastroduodenal artery**. - Hence, the second and third statements are individually correct, but the first statement which says duodenal ulcers are more common then gastric ulcers is also correct. *1, 2 and 3* - While statements 1 and 2 are correct individually, statement 3, which attributes bleeding as the most common complication specifically to posterior duodenal ulcers, is correct because posterior duodenal ulcers are particularly prone to bleeding due to the proximity of the **gastroduodenal artery** [1]. - Thus, all three statements are individually correct, but the combination chosen is redundant. *1 and 3 only* - This option is flawed because it omits statement 2, which correctly identifies **_H. pylori_** and **NSAIDs** as the primary causes of peptic ulcers [1]. - Although posterior duodenal ulcers are associated with bleeding, statement 3 is not complete enough without the inclusion of statement 2.
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