A 50-year-old male presents to the emergency with abdominal pain. He reports he has had abdominal pain associated with meals for several months and has been taking over the counter antacids as needed, but experienced significant worsening pain one hour ago in the epigastric region. The patient reports the pain radiating to his shoulders. Vital signs are T 38, HR 120, BP 100/60, RR 18, SpO2 98%. Physical exam reveals diffuse abdominal rigidity with rebound tenderness. Auscultation reveals hypoactive bowel sounds. Which of the following is the next best step in management?
Q62
A 71-year-old man with hypertension is taken to the emergency department after the sudden onset of stabbing abdominal pain that radiates to the back. He has smoked 1 pack of cigarettes daily for 20 years. His pulse is 120/min and thready, respirations are 18/min, and blood pressure is 82/54 mm Hg. Physical examination shows a periumbilical, pulsatile mass and abdominal bruit. There is epigastric tenderness. Which of the following is the most likely underlying mechanism of this patient's current condition?
Q63
A 42-year-old woman presents to the emergency department with abdominal pain. Her pain started last night during dinner and has persisted. This morning, the patient felt very ill and her husband called emergency medical services. The patient has a past medical history of obesity, diabetes, and depression. Her temperature is 104°F (40°C), blood pressure is 90/65 mmHg, pulse is 160/min, respirations are 14/min, and oxygen saturation is 98% on room air. Physical exam is notable for a very ill appearing woman. Her skin is mildly yellow, and she is in an antalgic position on the stretcher. Laboratory values are ordered as seen below.
Hemoglobin: 13 g/dL
Hematocrit: 38%
Leukocyte count: 14,500 cells/mm^3 with normal differential
Platelet count: 257,000/mm^3
Alkaline phosphatase: 227 U/L
Bilirubin, total: 11.3 mg/dL
Bilirubin, direct: 9.8 mg/dL
AST: 42 U/L
ALT: 31 U/L
The patient is started on antibiotics and IV fluids. Which of the following is the best next step in management?
Q64
A 68-year-old man is brought to the emergency department for increasing colicky lower abdominal pain and distention for 4 days. He has nausea. He has not passed flatus for the past 2 days. His last bowel movement was 4 days ago. He has hypertension, type 2 diabetes mellitus, and left hemiplegia due to a cerebral infarction that occurred 2 years ago. His current medications include aspirin, atorvastatin, hydrochlorothiazide, enalapril, and insulin. His temperature is 37.3°C (99.1°F), pulse is 90/min, and blood pressure is 126/84 mm Hg. Examination shows a distended and tympanitic abdomen. There is mild tenderness to palpation over the lower abdomen. Bowel sounds are decreased. Digital rectal examination shows an empty rectum. Muscle strength is decreased in the left upper and lower extremities. Deep tendon reflexes are 3+ on the left and 2+ on the right. The remainder of the examination shows no abnormalities. Laboratory studies are within normal limits. An x-ray of the abdomen in left lateral decubitus position is shown. The patient is kept nil per os and a nasogastric tube is inserted. Intravenous fluids are administered. Which of the following is the most appropriate next step in the management of this patient?
Q65
A 37-year-old woman comes to the physician because of right-sided inguinal pain for the past 8 weeks. During this period, the patient has had increased pain during activities such as walking and standing. She has no nausea, vomiting, or fever. Her temperature is 36.8°C (98.2°F), pulse is 73/min, and blood pressure is 132/80 mm Hg. The abdomen is soft and nontender. There is a visible and palpable groin protrusion above the inguinal ligament on the right side. Bulging is felt during Valsalva maneuver. Which of the following is the most likely diagnosis?
Q66
A 30-year-old woman, gravida 1, para 0, at 30 weeks' gestation is brought to the emergency department because of progressive upper abdominal pain for the past hour. The patient vomited once on her way to the hospital. She said she initially had dull, generalized stomach pain about 6 hours prior, but now the pain is located in the upper abdomen and is more severe. There is no personal or family history of any serious illnesses. She is sexually active with her husband. She does not smoke or drink alcohol. Medications include folic acid and a multivitamin. Her temperature is 38.5°C (101.3°F), pulse is 100/min, and blood pressure is 130/80 mm Hg. Physical examination shows right upper quadrant tenderness. The remainder of the examination shows no abnormalities. Laboratory studies show a leukocyte count of 12,000/mm3. Urinalysis shows mild pyuria. Which of the following is the most appropriate definitive treatment in the management of this patient?
Q67
A 75-year-old man is brought to the emergency department after 2 days of severe diffuse abdominal pain, nausea, vomiting, and lack of bowel movements, which has led him to stop eating. He has a history of type-2 diabetes mellitus, hypertension, and chronic obstructive pulmonary disease. Upon admission, his vital signs are within normal limits and physical examination shows diffuse abdominal tenderness, distention, lack of bowel sounds, and an empty rectal ampulla. After initial fluid therapy and correction of moderate hypokalemia, the patient's condition shows mild improvement. His abdominal plain film is taken and shown. Which of the following is the most appropriate concomitant approach?
Q68
A 33-year-old woman comes to the emergency department because of severe right flank pain for 2 hours. The pain is colicky in nature and she describes it as 9 out of 10 in intensity. She has had 2 episodes of vomiting. She has no history of similar episodes in the past. She is 160 cm (5 ft 3 in) tall and weighs 104 kg (229 lb); BMI is 41 kg/m2. Her temperature is 37.3°C (99.1°F), pulse is 96/min, respirations are 16/min and blood pressure is 116/76 mm Hg. The abdomen is soft and there is mild tenderness to palpation in the right lower quadrant. Bowel sounds are reduced. The remainder of the examination shows no abnormalities. Her leukocyte count is 7,400/mm3. A low-dose CT scan of the abdomen and pelvis shows a round 12-mm stone in the distal right ureter. Urine dipstick is mildly positive for blood. Microscopic examination of the urine shows RBCs and no WBCs. 0.9% saline infusion is begun and intravenous ketorolac is administered. Which of the following is the most appropriate next step in management?
Q69
A 57-year-old man presents to the emergency department after an episode of syncope. He states that he was at home when he suddenly felt weak and experienced back pain that has been persistent. He states that he vomited forcefully several times after the episode. The patient has a past medical history of diabetes, hypertension, dyslipidemia, and depression. He smokes 1.5 packs of cigarettes per day and drinks 10 alcoholic beverages each night. His temperature is 97.5°F (36.4°C), blood pressure is 107/48 mmHg, pulse is 130/min, respirations are 19/min, and oxygen saturation is 99% on room air. A chest radiograph is within normal limits. Physical exam is notable for abdominal tenderness and a man resting in an antalgic position. Urinalysis is currently pending but reveals a concentrated urine sample. Which of the following is the most likely diagnosis?
Q70
A 12-year-old boy is brought to the emergency room by his mother with complaints of abdominal pain and fever that started 24 hours ago. On further questioning, the mother says that her son vomited twice and has constipation that started approximately 1 and one-half days ago. The medical history is benign. The vital signs are as follows: heart rate 103/min, respiratory rate of 20/min, temperature 38.7°C (101.66°F), and blood pressure 109/69 mm Hg. On physical examination, there is severe right lower quadrant abdominal tenderness on palpation. Which of the following is the most likely cause for this patient’s symptoms?
Abdominal emergencies US Medical PG Practice Questions and MCQs
Question 61: A 50-year-old male presents to the emergency with abdominal pain. He reports he has had abdominal pain associated with meals for several months and has been taking over the counter antacids as needed, but experienced significant worsening pain one hour ago in the epigastric region. The patient reports the pain radiating to his shoulders. Vital signs are T 38, HR 120, BP 100/60, RR 18, SpO2 98%. Physical exam reveals diffuse abdominal rigidity with rebound tenderness. Auscultation reveals hypoactive bowel sounds. Which of the following is the next best step in management?
A. Admission and observation
B. Chest radiograph
C. 12 lead electrocardiogram
D. Abdominal CT scan (Correct Answer)
E. Abdominal ultrasound
Explanation: ***Abdominal CT scan***
- This patient presents with classic signs of a **perforated peptic ulcer**: sudden severe epigastric pain radiating to the shoulders (diaphragmatic irritation), fever, tachycardia, hypotension, and peritoneal signs (rigid abdomen with rebound tenderness).
- While the patient shows signs of **early shock** (BP 100/60, HR 120), he is **conscious and maintaining adequate oxygenation** (SpO2 98%), making him stable enough for rapid CT imaging.
- **Abdominal CT scan** is the **most sensitive and specific** test for detecting free air, identifying the location of perforation, and assessing for complications (abscess, contained perforation).
- CT provides **critical surgical planning information** about the extent and location of perforation, which can guide the surgical approach.
- This should be followed by **immediate surgical consultation** and preparation for emergency laparotomy.
*Chest radiograph*
- While an **upright chest X-ray** can detect free air under the diaphragm (pneumoperitoneum), it has **lower sensitivity** (70-80%) compared to CT scan (>95%).
- In a patient who is stable enough for imaging, **CT is preferred** as it provides more information for surgical planning.
- Chest X-ray would be the appropriate choice only if **CT is unavailable** or if the patient is **too unstable** to be transported to the CT scanner.
*Admission and observation*
- This patient has **acute peritonitis** from a likely perforated viscus, which is a **surgical emergency** requiring operative intervention.
- Observation would be inappropriate and dangerous, leading to **septic shock**, **multi-organ failure**, and death.
*12 lead electrocardiogram*
- While epigastric pain can sometimes be cardiac in origin, the **peritoneal signs** (rigid abdomen, rebound tenderness, hypoactive bowel sounds) clearly indicate an **intra-abdominal pathology**.
- The pain radiation to **both shoulders** (Kehr's sign) suggests diaphragmatic irritation from intraperitoneal air or fluid, not cardiac ischemia.
*Abdominal ultrasound*
- Ultrasound is useful for evaluating **solid organ injury**, **free fluid**, and conditions like **cholecystitis** or **appendicitis**.
- However, it is **poor at detecting free air** due to bowel gas artifact and has limited sensitivity for perforated viscus.
- It would not provide adequate information for this surgical emergency.
Question 62: A 71-year-old man with hypertension is taken to the emergency department after the sudden onset of stabbing abdominal pain that radiates to the back. He has smoked 1 pack of cigarettes daily for 20 years. His pulse is 120/min and thready, respirations are 18/min, and blood pressure is 82/54 mm Hg. Physical examination shows a periumbilical, pulsatile mass and abdominal bruit. There is epigastric tenderness. Which of the following is the most likely underlying mechanism of this patient's current condition?
A. Mesenteric atherosclerosis
B. Gastric mucosal ulceration
C. Portal vein stasis
D. Abdominal wall defect
E. Aortic wall stress (Correct Answer)
Explanation: ***Aortic wall stress***
- The patient's presentation with **sudden onset of stabbing abdominal pain radiating to the back**, **hypotension** (BP 82/54 mm Hg), **tachycardia** (pulse 120/min), and a **pulsatile periumbilical mass** with an **abdominal bruit** is highly suggestive of a ruptured **abdominal aortic aneurysm (AAA)**.
- **Aortic wall stress**, often exacerbated by **hypertension** and **smoking**, leads to the progressive weakening and dilation of the aortic wall, eventually resulting in rupture.
*Mesenteric atherosclerosis*
- This condition typically causes **chronic abdominal pain** that is worse after eating (**postprandial angina**) due to inadequate blood supply to the intestines.
- It does not usually present with an acute, catastrophic event like **shock** and a **pulsatile mass**.
*Gastric mucosal ulceration*
- Ulceration can cause **epigastric pain**, but a ruptured ulcer would typically present with signs of **peritonitis** (rigidity, rebound tenderness) and potentially **hematemesis** or **melena**, which are not described.
- It would not cause a **pulsatile periumbilical mass** or the characteristic back pain of an AAA.
*Portal vein stasis*
- **Portal vein stasis** or **thrombosis** often leads to **portal hypertension**, **ascites**, and **gastrointestinal bleeding** from varices.
- It does not explain the acute onset of severe abdominal pain, hypotension, a pulsatile mass, or an abdominal bruit.
*Abdominal wall defect*
- An **abdominal wall defect**, such as a hernia, can cause localized pain and sometimes bowel obstruction.
- However, it does not account for the **hypotension**, **tachycardia**, **radiating pain to the back**, or the **pulsatile mass**, all of which point to a major vascular emergency.
Question 63: A 42-year-old woman presents to the emergency department with abdominal pain. Her pain started last night during dinner and has persisted. This morning, the patient felt very ill and her husband called emergency medical services. The patient has a past medical history of obesity, diabetes, and depression. Her temperature is 104°F (40°C), blood pressure is 90/65 mmHg, pulse is 160/min, respirations are 14/min, and oxygen saturation is 98% on room air. Physical exam is notable for a very ill appearing woman. Her skin is mildly yellow, and she is in an antalgic position on the stretcher. Laboratory values are ordered as seen below.
Hemoglobin: 13 g/dL
Hematocrit: 38%
Leukocyte count: 14,500 cells/mm^3 with normal differential
Platelet count: 257,000/mm^3
Alkaline phosphatase: 227 U/L
Bilirubin, total: 11.3 mg/dL
Bilirubin, direct: 9.8 mg/dL
AST: 42 U/L
ALT: 31 U/L
The patient is started on antibiotics and IV fluids. Which of the following is the best next step in management?
A. Nasogastric tube and NPO
B. Supportive therapy followed by elective cholecystectomy
C. FAST exam
D. Emergency cholecystectomy
E. Endoscopic retrograde cholangiopancreatography (Correct Answer)
Explanation: ***Endoscopic retrograde cholangiopancreatography***
- The patient's presentation with **fever**, **jaundice**, **abdominal pain**, **hypotension**, and **tachycardia** (Reynolds' pentad) indicates **acute cholangitis**.
- **ERCP** is the best next step for **biliary decompression** and stone extraction in severe obstructive cholangitis to reduce morbidity and mortality.
*Nasogastric tube and NPO*
- While **NPO** (nothing by mouth) is standard for acute abdominal pain, a **nasogastric tube** is not typically indicated as a primary intervention for cholangitis unless there's associated vomiting or gastric distention.
- This step addresses symptoms but does not treat the underlying **biliary obstruction** and infection.
*Supportive therapy followed by elective cholecystectomy*
- **Supportive therapy** with antibiotics and IV fluids is already initiated but is insufficient for severe cholangitis requiring **urgent biliary drainage**.
- **Elective cholecystectomy** is performed after the acute infection has resolved, but not as an immediate intervention for an unstable patient with acute cholangitis.
*FAST exam*
- A **Focused Assessment with Sonography for Trauma (FAST)** exam is primarily used to detect **free fluid** (hemoperitoneum) in trauma patients.
- It is not indicated for the diagnosis or management of **biliary obstruction** or cholangitis in a non-trauma setting.
*Emergency cholecystectomy*
- **Emergency cholecystectomy** is generally reserved for complications like **gangrenous cholecystitis** or perforation, or after initial stabilization in acute cholecystitis.
- For **acute cholangitis**, the priority is **biliary decompression** first, which is typically achieved through ERCP, before considering cholecystectomy.
Question 64: A 68-year-old man is brought to the emergency department for increasing colicky lower abdominal pain and distention for 4 days. He has nausea. He has not passed flatus for the past 2 days. His last bowel movement was 4 days ago. He has hypertension, type 2 diabetes mellitus, and left hemiplegia due to a cerebral infarction that occurred 2 years ago. His current medications include aspirin, atorvastatin, hydrochlorothiazide, enalapril, and insulin. His temperature is 37.3°C (99.1°F), pulse is 90/min, and blood pressure is 126/84 mm Hg. Examination shows a distended and tympanitic abdomen. There is mild tenderness to palpation over the lower abdomen. Bowel sounds are decreased. Digital rectal examination shows an empty rectum. Muscle strength is decreased in the left upper and lower extremities. Deep tendon reflexes are 3+ on the left and 2+ on the right. The remainder of the examination shows no abnormalities. Laboratory studies are within normal limits. An x-ray of the abdomen in left lateral decubitus position is shown. The patient is kept nil per os and a nasogastric tube is inserted. Intravenous fluids are administered. Which of the following is the most appropriate next step in the management of this patient?
A. Colonoscopy
B. Intravenous antibiotic therapy
C. Rectal tube insertion
D. Endoscopic detorsion (Correct Answer)
E. Metoclopramide therapy
Explanation: ***Endoscopic detorsion***
- The clinical presentation (elderly patient with immobility, colicky abdominal pain, abdominal distention, obstipation, empty rectum, and characteristic x-ray findings) is classic for **sigmoid volvulus**
- After initial resuscitation (NPO, NG tube, IV fluids), the most appropriate next step is **therapeutic endoscopic detorsion** via flexible sigmoidoscopy or colonoscopy
- Success rate of endoscopic detorsion for sigmoid volvulus is **70-80%** in the absence of ischemia or perforation
- This provides immediate decompression and untwisting of the volved segment
- A rectal tube is typically left in place after successful detorsion to prevent early recurrence
*Colonoscopy*
- While colonoscopy is the instrument used for detorsion, this option is **too vague** as it doesn't specify the therapeutic intent
- Diagnostic colonoscopy alone without performing detorsion would not address the acute volvulus
- The key is performing **therapeutic intervention** (detorsion), not just visualization
*Intravenous antibiotic therapy*
- No evidence of bowel ischemia, perforation, or peritonitis (no fever, normal vital signs, normal labs, mild tenderness only)
- Antibiotics would be indicated if there were signs of **gangrenous bowel** or perforation
- This patient requires mechanical relief of obstruction, not antimicrobial therapy
*Rectal tube insertion*
- A rectal tube is placed **after successful endoscopic detorsion** to prevent immediate recurrence
- Rectal tube insertion alone cannot achieve detorsion of a sigmoid volvulus
- This is an adjunctive measure, not the definitive therapeutic intervention
*Metoclopramide therapy*
- Contraindicated in **mechanical bowel obstruction** as it can worsen the obstruction and increase risk of perforation
- Prokinetic agents promote peristalsis, which is dangerous when there is a mechanical twist
- This patient has complete obstruction requiring mechanical relief, not pharmacologic motility enhancement
Question 65: A 37-year-old woman comes to the physician because of right-sided inguinal pain for the past 8 weeks. During this period, the patient has had increased pain during activities such as walking and standing. She has no nausea, vomiting, or fever. Her temperature is 36.8°C (98.2°F), pulse is 73/min, and blood pressure is 132/80 mm Hg. The abdomen is soft and nontender. There is a visible and palpable groin protrusion above the inguinal ligament on the right side. Bulging is felt during Valsalva maneuver. Which of the following is the most likely diagnosis?
A. Indirect inguinal hernia (Correct Answer)
B. Strangulated hernia
C. Inguinal lymphadenopathy
D. Direct inguinal hernia
E. Lipoma
Explanation: ***Indirect inguinal hernia***
- The presence of a **palpable groin protrusion above the inguinal ligament** that bulges with the **Valsalva maneuver** is highly indicative of an inguinal hernia.
- An **indirect inguinal hernia** is suggested by the **patient's age and sex** (younger woman), the **chronic nature** of symptoms, and **activity-related pain**.
- Indirect inguinal hernias pass through the **internal inguinal ring lateral to the inferior epigastric vessels** via a persistent **processus vaginalis**.
*Strangulated hernia*
- This option is unlikely as there are no signs of **bowel ischemia** such as nausea, vomiting, fever, or significant tenderness.
- A strangulated hernia would present with acute, severe pain, and signs of systemic toxicity or obstruction.
*Inguinal lymphadenopathy*
- While inguinal lymph nodes can be palpable, they typically present as discrete, firm masses, sometimes tender, and do not usually **bulge with a Valsalva maneuver**.
- Lymphadenopathy is often associated with infection or malignancy, which are not suggested by the patient's symptoms.
*Direct inguinal hernia*
- Direct inguinal hernias protrude through **Hesselbach's triangle medial to the inferior epigastric vessels** due to weakness in the abdominal wall.
- They are more common in **older men** due to weakening of abdominal wall muscles, whereas this patient is a **37-year-old woman**.
- While both direct and indirect hernias present above the inguinal ligament, the patient's demographics favor an indirect hernia.
*Lipoma*
- A lipoma is a benign fatty tumor that can present as a soft, movable mass but would not typically **bulge with the Valsalva maneuver** or cause pain specifically with activity in this manner.
- Lipomas are generally asymptomatic unless they grow very large or compress nerves.
Question 66: A 30-year-old woman, gravida 1, para 0, at 30 weeks' gestation is brought to the emergency department because of progressive upper abdominal pain for the past hour. The patient vomited once on her way to the hospital. She said she initially had dull, generalized stomach pain about 6 hours prior, but now the pain is located in the upper abdomen and is more severe. There is no personal or family history of any serious illnesses. She is sexually active with her husband. She does not smoke or drink alcohol. Medications include folic acid and a multivitamin. Her temperature is 38.5°C (101.3°F), pulse is 100/min, and blood pressure is 130/80 mm Hg. Physical examination shows right upper quadrant tenderness. The remainder of the examination shows no abnormalities. Laboratory studies show a leukocyte count of 12,000/mm3. Urinalysis shows mild pyuria. Which of the following is the most appropriate definitive treatment in the management of this patient?
A. Laparoscopic removal of ovarian cysts
B. Cefoxitin and azithromycin
C. Appendectomy
D. Cholecystectomy (Correct Answer)
E. Intramuscular ceftriaxone followed by cephalexin
Explanation: ***Cholecystectomy***
- The patient's presentation (fever, RUQ pain, leukocytosis, vomiting) is classic for **acute cholecystitis** in pregnancy, which requires **cholecystectomy** as the definitive treatment.
- **Laparoscopic cholecystectomy** is safe during pregnancy and is the **preferred definitive treatment** for acute cholecystitis, ideally performed in the second trimester but can be done in the third trimester when indicated.
- While conservative management with antibiotics and supportive care can be attempted initially, cholecystectomy remains the definitive treatment and is increasingly performed during pregnancy to avoid recurrent symptoms and complications.
- The mild pyuria is likely secondary to adjacent inflammation rather than a primary UTI.
*Laparoscopic removal of ovarian cysts*
- Ovarian cysts typically present with **pelvic or lower abdominal pain**, not RUQ tenderness.
- The clinical picture with fever, leukocytosis, and RUQ pain strongly suggests biliary pathology, not ovarian pathology.
*Cefoxitin and azithromycin*
- This regimen is used for **pelvic inflammatory disease (PID)**, which presents with lower abdominal/pelvic pain, cervical motion tenderness, and vaginal discharge.
- The patient's RUQ localization and fever pattern do not support PID as the primary diagnosis.
*Intramuscular ceftriaxone followed by cephalexin*
- This regimen treats **gonorrhea/chlamydia** or uncomplicated UTIs.
- While mild pyuria is present, the dominant clinical features (fever, RUQ pain, leukocytosis) point to cholecystitis, not a primary genitourinary infection.
- Antibiotics alone would not provide definitive treatment for acute cholecystitis.
*Appendectomy*
- **Appendicitis** in pregnancy typically causes **RLQ pain** (though it can migrate superiorly in the third trimester due to uterine displacement).
- The distinct **RUQ localization** with the classic triad of fever, RUQ pain, and leukocytosis makes cholecystitis far more likely than appendicitis.
Question 67: A 75-year-old man is brought to the emergency department after 2 days of severe diffuse abdominal pain, nausea, vomiting, and lack of bowel movements, which has led him to stop eating. He has a history of type-2 diabetes mellitus, hypertension, and chronic obstructive pulmonary disease. Upon admission, his vital signs are within normal limits and physical examination shows diffuse abdominal tenderness, distention, lack of bowel sounds, and an empty rectal ampulla. After initial fluid therapy and correction of moderate hypokalemia, the patient's condition shows mild improvement. His abdominal plain film is taken and shown. Which of the following is the most appropriate concomitant approach?
A. Exploratory surgery
B. Initiate pain management with morphine
C. Initiate intravenous metoclopramide
D. Gastrografin enema
E. Nasogastric decompression (Correct Answer)
Explanation: ***Nasogastric decompression***
- The patient exhibits symptoms consistent with **bowel obstruction** (diffuse abdominal pain, distention, absent bowel sounds, empty rectal ampulla), which can lead to significant fluid and gas accumulation. **Nasogastric decompression** is crucial to relieve pressure, prevent aspiration, and stabilize the patient.
- This intervention helps manage symptoms, reduces the risk of complications, and provides time for further diagnostic workup while addressing fluid and electrolyte imbalances.
*Exploratory surgery*
- While surgery may be indicated for complete bowel obstruction, it is usually reserved for cases that fail conservative management or show signs of **strangulation** or **perforation**.
- Without evidence of these acute complications and given the patient's mild improvement after initial therapy, immediate surgery is not the most appropriate first step.
*Initiate pain management with morphine*
- While pain management is important, **opioids** like morphine can actually **reduce bowel motility** and worsen a bowel obstruction.
- Addressing the underlying obstruction through decompression should be prioritized before initiating pain medication that could exacerbate the condition.
*Initiate intravenous metoclopramide*
- **Metoclopramide** is a **prokinetic agent** that increases gastrointestinal motility.
- In a suspected bowel obstruction, stimulating motility can increase intraluminal pressure and potentially worsen the condition or increase the risk of perforation, making it contraindicated.
*Gastrografin enema*
- A **Gastrografin enema** is typically used to diagnose and sometimes treat **distal colonic obstructions**, or as a therapeutic trial for **meconium ileus** in infants.
- Given the diffuse abdominal pain and an empty rectal ampulla suggesting a more proximal or severe obstruction, an enema may not be appropriate and could even be dangerous if there's a risk of perforation.
Question 68: A 33-year-old woman comes to the emergency department because of severe right flank pain for 2 hours. The pain is colicky in nature and she describes it as 9 out of 10 in intensity. She has had 2 episodes of vomiting. She has no history of similar episodes in the past. She is 160 cm (5 ft 3 in) tall and weighs 104 kg (229 lb); BMI is 41 kg/m2. Her temperature is 37.3°C (99.1°F), pulse is 96/min, respirations are 16/min and blood pressure is 116/76 mm Hg. The abdomen is soft and there is mild tenderness to palpation in the right lower quadrant. Bowel sounds are reduced. The remainder of the examination shows no abnormalities. Her leukocyte count is 7,400/mm3. A low-dose CT scan of the abdomen and pelvis shows a round 12-mm stone in the distal right ureter. Urine dipstick is mildly positive for blood. Microscopic examination of the urine shows RBCs and no WBCs. 0.9% saline infusion is begun and intravenous ketorolac is administered. Which of the following is the most appropriate next step in management?
A. Ureteral stenting
B. Ureteroscopy (Correct Answer)
C. Observation
D. Extracorporeal shock wave lithotripsy
E. Thiazide diuretic therapy
Explanation: ***Ureteroscopy***
- **Ureteroscopy** is the most appropriate next step for a 12-mm symptomatic distal ureteral stone, especially given its size.
- It allows for direct visualization of the stone and immediate fragmentation or extraction, providing rapid relief of symptoms and addressing the obstruction.
*Ureteral stenting*
- **Ureteral stenting** is primarily used to relieve obstruction and pain, or to bypass the stone, but it does not remove the stone.
- It is often considered a temporary measure to decompress the kidney, particularly in cases of infection or severe obstruction, but definitive treatment for the stone would still be needed.
*Observation*
- **Observation** is generally reserved for smaller ureteral stones (typically <5 mm) that are likely to pass spontaneously.
- A 12-mm stone has a very low chance of spontaneous passage and would likely lead to prolonged pain, obstruction, and potential complications.
*Extracorporeal shock wave lithotripsy*
- **Extracorporeal shock wave lithotripsy (ESWL)** is less effective for larger stones (>10 mm) and stones located in the distal ureter, as successful fragmentation and passage are reduced.
- It is generally more effective for smaller, proximal ureteral or renal stones.
*Thiazide diuretic therapy*
- **Thiazide diuretics** are used as a preventative measure to reduce calcium excretion and thus decrease the risk of new calcium stone formation, but they are not a treatment for an acutely obstructing stone.
- This therapy would not alleviate the current acute pain or obstruction caused by the 12-mm stone.
Question 69: A 57-year-old man presents to the emergency department after an episode of syncope. He states that he was at home when he suddenly felt weak and experienced back pain that has been persistent. He states that he vomited forcefully several times after the episode. The patient has a past medical history of diabetes, hypertension, dyslipidemia, and depression. He smokes 1.5 packs of cigarettes per day and drinks 10 alcoholic beverages each night. His temperature is 97.5°F (36.4°C), blood pressure is 107/48 mmHg, pulse is 130/min, respirations are 19/min, and oxygen saturation is 99% on room air. A chest radiograph is within normal limits. Physical exam is notable for abdominal tenderness and a man resting in an antalgic position. Urinalysis is currently pending but reveals a concentrated urine sample. Which of the following is the most likely diagnosis?
A. Abdominal aortic aneurysm (Correct Answer)
B. Pancreatitis
C. Nephrolithiasis
D. Boerhaave syndrome
E. Aortic dissection
Explanation: ***Abdominal aortic aneurysm***
- The patient's presentation with **syncope**, **back pain**, **abdominal tenderness**, and **hypotension (107/48 mmHg)** in a patient with significant **cardiovascular risk factors** (diabetes, hypertension, dyslipidemia, smoking) is highly suggestive of a ruptured or leaking abdominal aortic aneurysm.
- The forceful vomiting, likely a systemic response to severe pain and hypoperfusion, combined with the other findings points to this life-threatening emergency.
*Pancreatitis*
- While pancreatitis can cause severe abdominal pain and vomiting, the presence of **syncope** and significant **hypotension** along with **back pain** is less typical as the primary presentation.
- Pancreatitis often presents with pain radiating to the back in an epigastric location, not generalized back pain with syncope.
*Nephrolithiasis*
- **Nephrolithiasis** typically causes severe, colicky flank pain that may radiate to the groin, hematuria, and dysuria.
- While it can cause back pain and sometimes vomiting due to severe pain, **syncope with hypotension** is not typical unless there is severe sepsis, which is not suggested by the vital signs or focused exam.
*Boerhaave syndrome*
- **Boerhaave syndrome** (esophageal rupture) is characterized by severe retrosternal chest pain, dyspnea, and subcutaneous emphysema, often following forceful vomiting.
- While the patient had forceful vomiting, his primary complaint is back pain, not chest pain, and other signs like subcutaneous emphysema are absent. The chest X-ray was also normal.
*Aortic dissection*
- An **aortic dissection** is a critical diagnosis that can cause severe back pain and hypotension and is associated with similar risk factors.
- However, the pain of an aortic dissection is typically described as **sudden onset, tearing, or ripping** and often migrates. The presentation of abdominal tenderness and syncope points more specifically to an abdominal catastrophe than a thoracic dissection.
Question 70: A 12-year-old boy is brought to the emergency room by his mother with complaints of abdominal pain and fever that started 24 hours ago. On further questioning, the mother says that her son vomited twice and has constipation that started approximately 1 and one-half days ago. The medical history is benign. The vital signs are as follows: heart rate 103/min, respiratory rate of 20/min, temperature 38.7°C (101.66°F), and blood pressure 109/69 mm Hg. On physical examination, there is severe right lower quadrant abdominal tenderness on palpation. Which of the following is the most likely cause for this patient’s symptoms?
A. Luminal obstruction due to a fecalith (Correct Answer)
B. Ascending infection of the urinary tract
C. Telescoping of bowel segment causing intestinal obstruction
D. Twisting of testes on its axis, hampering the blood supply
E. Immune-mediated vasculitis associated with IgA deposition
Explanation: ***Luminal obstruction due to a fecalith***
- The classic presentation of **appendicitis** in a 12-year-old boy, including **abdominal pain**, fever, vomiting, constipation, and **right lower quadrant tenderness**, is most commonly caused by **luminal obstruction** due to a **fecalith**.
- This obstruction leads to inflammation, bacterial overgrowth, and edema of the appendix, resulting in the described symptoms.
- Other causes of appendiceal luminal obstruction include **lymphoid hyperplasia** and, less commonly, parasites or tumors.
*Ascending infection of the urinary tract*
- While urinary tract infections (UTIs) can cause fever and abdominal pain, the **severe, localized right lower quadrant tenderness** and specific progression of symptoms (vomiting, constipation) are less typical than for appendicitis.
- UTIs are usually associated with **dysuria, frequency, and urgency**, which are not mentioned here.
*Telescoping of bowel segment causing intestinal obstruction*
- This describes **intussusception**, which typically presents in **younger children (6 months to 3 years)** with **colicky abdominal pain**, vomiting, and **currant jelly stools**.
- While it can cause abdominal pain and vomiting, the **age of the patient**, **localized right lower quadrant tenderness**, and absence of classic signs make appendicitis more likely.
*Twisting of testes on its axis, hampering the blood supply*
- This describes **testicular torsion**, which presents with **sudden, severe scrotal pain**, swelling, and tenderness, sometimes with referred abdominal pain.
- The primary complaint of **abdominal pain** with associated vomiting, fever, and right lower quadrant tenderness makes appendicitis a more likely diagnosis.
*Immune-mediated vasculitis associated with IgA deposition*
- This refers to **Henoch-Schönlein purpura (HSP)**, which typically presents with a **palpable purpuric rash** on the lower extremities and buttocks, **arthralgia**, abdominal pain, and sometimes renal involvement.
- The absence of a rash and key features of HSP makes this diagnosis less likely than appendicitis.