A 76-year-old woman with a history of chronic constipation and laxative use presents with a 5-day history of progressive abdominal distension, cramping pain, and absolute constipation. On examination, her abdomen is grossly distended and tympanic, particularly in the left upper quadrant, with mild tenderness but no peritonism. Plain abdominal radiograph shows a massively dilated loop of bowel in the left upper abdomen with the appearance of a 'bent inner tube' sign. What is the definitive management for this condition?
Q112
A 58-year-old man presents to the emergency department with sudden onset severe generalized abdominal pain. He has a history of recurrent peptic ulcer disease and takes omeprazole. On examination, his abdomen is rigid with generalized tenderness and absent bowel sounds. An erect chest radiograph shows no free air under the diaphragm. He proceeds to emergency laparotomy where a perforated duodenal ulcer is found. What is the most likely explanation for the absence of pneumoperitoneum on the chest radiograph?
Q113
A 44-year-old woman presents with a 12-hour history of severe epigastric pain radiating to the back. She drinks approximately 35 units of alcohol per week. On examination, she is tachycardic at 115 bpm, blood pressure 100/65 mmHg, temperature 37.8°C, and has epigastric tenderness with guarding. Blood tests show: amylase 1850 U/L, CRP 185 mg/L, calcium 1.95 mmol/L, albumin 32 g/L (corrected calcium 2.08 mmol/L). CT abdomen shows pancreatic oedema with peripancreatic fluid but no necrosis. An erect chest radiograph shows no free air. What is the most likely cause if free intraperitoneal air develops 48 hours later?
Q114
What is the most accurate statement regarding the use of water-soluble contrast medium (Gastrografin) in the management of adhesional small bowel obstruction?
Q115
A 72-year-old man presents with sudden onset severe abdominal pain that began 8 hours ago. He has atrial fibrillation but stopped taking warfarin 3 months ago. On examination, he appears distressed with heart rate 110 bpm irregularly irregular, blood pressure 95/60 mmHg. His abdomen is soft but diffusely tender with guarding in the central abdomen. Bowel sounds are absent. Blood tests show: lactate 6.8 mmol/L, WCC 18.5 × 10⁹/L, and metabolic acidosis on arterial blood gas. CT angiogram shows superior mesenteric artery occlusion. Which finding on CT would most strongly indicate bowel infarction requiring emergency laparotomy?
Q116
A 55-year-old man with type 2 diabetes mellitus presents with a 4-day history of gradually worsening right lower quadrant pain, fever, and anorexia. On examination, temperature is 38.2°C, and there is a palpable tender mass in the right iliac fossa. White cell count is 16.2 × 10⁹/L. CT abdomen shows a 5 cm appendiceal mass with surrounding inflammatory changes and a small loculated fluid collection. What is the most appropriate management strategy?
Q117
A 67-year-old woman with a history of multiple previous laparotomies presents with a 48-hour history of colicky central abdominal pain, vomiting, and absolute constipation. On examination, her abdomen is distended with a previous midline surgical scar, and bowel sounds are hyperactive. An erect chest radiograph shows no free air under the diaphragm. CT scan reveals dilated small bowel loops measuring up to 4.5 cm with a transition point and collapsed distal bowel. What is the most appropriate initial management?
Q118
A 59-year-old man with a history of chronic alcohol excess and previous duodenal ulcer presents with sudden onset severe epigastric pain. Examination reveals a rigid abdomen with absent bowel sounds. Erect chest radiograph shows free gas under the diaphragm. During emergency laparotomy, 1500ml of purulent fluid is aspirated and a 5mm perforation is identified on the anterior wall of the first part of the duodenum with indurated edges. What is the most appropriate surgical management?
Q119
What is the Modified Alvarado Score and what is its primary clinical utility in acute surgical assessment?
Q120
A 67-year-old man undergoes elective right hemicolectomy for caecal carcinoma. Post-operatively, he develops increasing abdominal distension and pain. On day 4 post-operation, abdominal examination reveals a tense, distended abdomen with reduced bowel sounds. CT demonstrates gross dilatation of small bowel loops to the level of the ileocolic anastomosis with no evidence of mechanical obstruction, leak, or collection. What is the most appropriate initial management?
Acute Surgical Presentations UK Medical PG Practice Questions and MCQs
Question 111: A 76-year-old woman with a history of chronic constipation and laxative use presents with a 5-day history of progressive abdominal distension, cramping pain, and absolute constipation. On examination, her abdomen is grossly distended and tympanic, particularly in the left upper quadrant, with mild tenderness but no peritonism. Plain abdominal radiograph shows a massively dilated loop of bowel in the left upper abdomen with the appearance of a 'bent inner tube' sign. What is the definitive management for this condition?
A. Urgent laparotomy with bowel resection and end colostomy
B. Rigid sigmoidoscopy with insertion of a flatus tube
C. Emergency right hemicolectomy
D. Colonoscopic decompression followed by elective sigmoid colectomy (Correct Answer)
E. High-dose laxatives and prolonged conservative management
Explanation: ***Colonoscopic decompression followed by elective sigmoid colectomy***
- The clinical presentation and **'bent inner tube' sign** are pathognomonic for **sigmoid volvulus**, where initial decompression is successful in up to 90% of uncomplicated cases.
- Since recurrence rates after decompression alone are as high as 60%, a **sigmoid colectomy** is the definitive management to prevent future episodes.
*Urgent laparotomy with bowel resection and end colostomy*
- This approach, known as a **Hartmann's procedure**, is reserved for patients with signs of **bowel ischemia**, gangrene, or perforation.
- In this stable patient with no signs of **peritonism**, a less invasive first-line approach followed by elective surgery is preferred.
*Rigid sigmoidoscopy with insertion of a flatus tube*
- While this can be used for acute **detorsion** and decompression, it is considered a **temporizing measure** rather than definitive management.
- **Flexible sigmoidoscopy** or colonoscopy is generally preferred over rigid techniques due to better visualization and a lower risk of iatrogenic injury.
*Emergency right hemicolectomy*
- A **right hemicolectomy** is used to treat pathologies of the cecum and ascending colon, such as **cecal volvulus**.
- Sigmoid volvulus involves the distal large bowel; therefore, resection must focus on the **sigmoid colon**.
*High-dose laxatives and prolonged conservative management*
- Laxatives are contraindicated in the setting of a **mechanical bowel obstruction** as they can increase intraluminal pressure and risk perforation.
- Conservative management alone fails to address the anatomical redundancy that causes the volvulus, leading to **unacceptably high recurrence rates**.
Question 112: A 58-year-old man presents to the emergency department with sudden onset severe generalized abdominal pain. He has a history of recurrent peptic ulcer disease and takes omeprazole. On examination, his abdomen is rigid with generalized tenderness and absent bowel sounds. An erect chest radiograph shows no free air under the diaphragm. He proceeds to emergency laparotomy where a perforated duodenal ulcer is found. What is the most likely explanation for the absence of pneumoperitoneum on the chest radiograph?
A. The perforation is sealed by omentum preventing gas leakage
B. The patient was supine for too long before the radiograph was taken
C. Small perforations release insufficient gas to be radiologically visible (Correct Answer)
D. Duodenal perforations are retroperitoneal and therefore do not cause pneumoperitoneum
E. Free air was absorbed by peritoneal surfaces before the radiograph was performed
Explanation: ***Small perforations release insufficient gas to be radiologically visible*** - An erect chest radiograph has limited sensitivity, missing **pneumoperitoneum** in approximately **20-30%** of perforated peptic ulcer cases. - If the stomach is empty or the perforation is very small, the **volume of gas** released may be below the detection threshold for plain films. *The perforation is sealed by omentum preventing gas leakage* - While a **sealed perforation** can limit further leakage, it usually occurs after some gas or fluid has already entered the peritoneal cavity. - Clinical signs of **generalized peritonitis** and a rigid abdomen suggest a significant leak occurred, making insufficient volume a more likely radiological explanation than total sealing. *The patient was supine for too long before the radiograph was taken* - Being supine doesn't prevent detection; it just requires the patient to remain **upright for 10-20 minutes** before the film to allow gas to rise. - If the patient was upright for the **erect radiograph**, gravity would have moved any significant free gas to the subdiaphragmatic space. *Duodenal perforations are retroperitoneal and therefore do not cause pneumoperitoneum* - Most duodenal perforations occur in the **first part of the duodenum (anterior surface)**, which is intraperitoneal. - **Posterior ulcers** usually erode into the pancreas or retroperitoneum, but they typically present with back pain rather than acute **generalized peritonitis** and rigidity. *Free air was absorbed by peritoneal surfaces before the radiograph was performed* - **Pneumoperitoneum** takes several days to be fully absorbed by the peritoneal lining; it would not disappear in the acute setting. - The rapid onset of symptoms and presentation to the ED means there was no time for **physiological absorption** of free gas.
Question 113: A 44-year-old woman presents with a 12-hour history of severe epigastric pain radiating to the back. She drinks approximately 35 units of alcohol per week. On examination, she is tachycardic at 115 bpm, blood pressure 100/65 mmHg, temperature 37.8°C, and has epigastric tenderness with guarding. Blood tests show: amylase 1850 U/L, CRP 185 mg/L, calcium 1.95 mmol/L, albumin 32 g/L (corrected calcium 2.08 mmol/L). CT abdomen shows pancreatic oedema with peripancreatic fluid but no necrosis. An erect chest radiograph shows no free air. What is the most likely cause if free intraperitoneal air develops 48 hours later?
A. Perforation of a posterior gastric ulcer
B. Ischaemic perforation of the transverse colon
C. Duodenal perforation secondary to the acute pancreatitis (Correct Answer)
D. Spontaneous bacterial peritonitis
E. Iatrogenic perforation from nasogastric tube insertion
Explanation: ***Duodenal perforation secondary to the acute pancreatitis***
- In the context of severe **acute pancreatitis**, enzymes and inflammation can cause **pressure necrosis** or direct enzymatic damage to the adjacent **duodenal wall**.
- While rare, this complication presents with **pneumoperitoneum** (free air) on imaging and requires urgent surgical assessment due to the high risk of **peritonitis**.
*Perforation of a posterior gastric ulcer*
- A **posterior gastric ulcer** typically perforates into the **lesser sac** rather than the general peritoneal cavity, often failing to show free air on an erect chest X-ray.
- While a potential cause of epigastric pain, the clinical picture here is dominated by **biochemically proven pancreatitis** (amylase 1850 U/L).
*Ischaemic perforation of the transverse colon*
- **Colonic ischaemia** in pancreatitis usually results from **thrombosis** of the mesenteric vessels or severe hypotension, but it mostly affects the **splenic flexure**.
- This complication typically occurs much later in the disease course rather than appearing as an acute change at **48 hours**.
*Spontaneous bacterial peritonitis*
- This is a complication of **cirrhotic ascites** caused by bacterial translocation, not a structural perforation of a hollow viscus.
- **Spontaneous bacterial peritonitis** does not result in **free intraperitoneal air** (pneumoperitoneum).
*Iatrogenic perforation from nasogastric tube insertion*
- An iatrogenic injury from a **nasogastric tube** would typically manifest symptoms and free air immediately following the **procedure**.
- It is a highly unlikely cause for air appearing specifically **48 hours** after the initial presentation of pancreatitis.
Question 114: What is the most accurate statement regarding the use of water-soluble contrast medium (Gastrografin) in the management of adhesional small bowel obstruction?
A. Its primary benefit is therapeutic by reducing bowel wall oedema through osmotic action
B. Passage of contrast to the colon within 24 hours predicts resolution with conservative management and reduces hospital stay (Correct Answer)
C. It should be administered immediately on presentation to all patients with suspected small bowel obstruction
D. Its therapeutic effect is mainly due to stimulation of intestinal motility through direct mucosal irritation
E. It is contraindicated in patients with complete small bowel obstruction due to risk of aspiration
Explanation: ***Passage of contrast to the colon within 24 hours predicts resolution with conservative management and reduces hospital stay***
- Gastrografin is highly accurate in predicting the success of **non-operative management**, with a high sensitivity and specificity for resolution if the contrast reaches the colon.
- Clinical evidence indicates that its use significantly **reduces the length of hospital stay** by enabling earlier discharge or earlier surgical intervention.
*Its primary benefit is therapeutic by reducing bowel wall oedema through osmotic action*
- While Gastrografin is **hyperosmolar**, its primary clinical value in evidence-based guidelines is **predictive (diagnostic)** rather than solely therapeutic.
- Although it may draw water into the lumen to reduce wall edema, this is considered a secondary benefit compared to its role in **management stratification**.
*It should be administered immediately on presentation to all patients with suspected small bowel obstruction*
- Contrast should not be given until **initial resuscitation** and diagnostic confirmation via **CT scan** or X-ray have been performed.
- Immediate administration is inappropriate for patients showing signs of **perforation**, strangulation, or ischemia, which require emergency surgery.
*Its therapeutic effect is mainly due to stimulation of intestinal motility through direct mucosal irritation*
- The therapeutic effect is attributed to its **high osmolarity**, which draws interstitial fluid into the bowel lumen, increasing the pressure gradient.
- It does not function as a **chemical irritant** to the mucosa; rather, the increased luminal volume indirectly promotes **peristalsis**.
*It is contraindicated in patients with complete small bowel obstruction due to risk of aspiration*
- It is not strictly contraindicated; it is often used via a **nasogastric tube** with careful aspiration of gastric contents to mitigate risk.
- The primary absolute contraindications are **perforation** or clinical evidence of **bowel ischemia** and strangulation.
Question 115: A 72-year-old man presents with sudden onset severe abdominal pain that began 8 hours ago. He has atrial fibrillation but stopped taking warfarin 3 months ago. On examination, he appears distressed with heart rate 110 bpm irregularly irregular, blood pressure 95/60 mmHg. His abdomen is soft but diffusely tender with guarding in the central abdomen. Bowel sounds are absent. Blood tests show: lactate 6.8 mmol/L, WCC 18.5 × 10⁹/L, and metabolic acidosis on arterial blood gas. CT angiogram shows superior mesenteric artery occlusion. Which finding on CT would most strongly indicate bowel infarction requiring emergency laparotomy?
A. Dilated fluid-filled loops of small bowel
B. Pneumatosis intestinalis with portal venous gas (Correct Answer)
C. Mesenteric fat stranding and ascites
D. Thickened bowel wall with submucosal oedema
E. Superior mesenteric artery filling defect
Explanation: ***Pneumatosis intestinalis with portal venous gas***
- **Pneumatosis intestinalis** (gas within the bowel wall) and **portal venous gas** are highly specific indicators of transmural **bowel infarction** and irreversible necrosis.
- These findings, combined with clinical signs of **peritonitis** and high **lactate**, mandate an immediate **emergency laparotomy** for resection of necrotic tissue.
*Dilated fluid-filled loops of small bowel*
- This finding is common in **paralytic ileus** or bowel obstruction and lacks specificity for tissue viability.
- While often present in **mesenteric ischemia**, it does not provide definitive evidence of **transmural infarction** compared to intramural gas.
*Mesenteric fat stranding and ascites*
- These are non-specific markers of **peritoneal inflammation** or congestion often seen in various acute abdominal conditions.
- While they suggest significant pathology, they do not confirm that the **bowel wall** has undergone irreversible **necrosis**.
*Thickened bowel wall with submucosal oedema*
- This represents the **"target sign"** often seen in early or **reversible ischemia** and inflammatory conditions.
- Wall thickening is distinct from the thinning associated with late-stage **infarction**, where the bowel wall loses its integrity.
*Superior mesenteric artery filling defect*
- This confirms the **site of occlusion** (likely embolic due to **atrial fibrillation**) but does not determine the secondary status of the bowel tissue.
- Identifying the occlusion helps localize the source, but the need for **emergency resection** is determined by the signs of tissue death like **pneumatosis**.
Question 116: A 55-year-old man with type 2 diabetes mellitus presents with a 4-day history of gradually worsening right lower quadrant pain, fever, and anorexia. On examination, temperature is 38.2°C, and there is a palpable tender mass in the right iliac fossa. White cell count is 16.2 × 10⁹/L. CT abdomen shows a 5 cm appendiceal mass with surrounding inflammatory changes and a small loculated fluid collection. What is the most appropriate management strategy?
A. Immediate open appendicectomy
B. Percutaneous drainage of the collection and intravenous antibiotics
C. Conservative management with intravenous antibiotics alone followed by interval appendicectomy at 6-8 weeks (Correct Answer)
D. Emergency laparoscopic appendicectomy within 6 hours
E. Right hemicolectomy to remove the inflammatory mass
Explanation: ***Conservative management with intravenous antibiotics alone followed by interval appendicectomy at 6-8 weeks***- The presence of an **appendiceal mass** (phlegmon) following a subacute presentation of pain indicates that the infection is already walled off by the **omentum** and surrounding bowel.- **Initial conservative management** reduces the risk of complications like **bowel injury** or fistula formation that occur when operating in an intensely inflamed field. An **interval appendicectomy** is performed later to prevent recurrence and exclude malignancy.*Immediate open appendicectomy*- Surgery performed on an established **inflammatory mass** is technically demanding and carries a high risk of requiring a bowel resection or causing an **enterocutaneous fistula**.- It is generally reserved for patients who do not respond to conservative measures or show signs of **generalized peritonitis**.*Percutaneous drainage of the collection and intravenous antibiotics*- **Percutaneous drainage** is typically indicated for larger, discrete **appendiceal abscesses** (generally >3-5 cm) that are accessible under radiological guidance.- In this case, the **loculated fluid collection** is described as small and likely to resolve with **intravenous antibiotics** alone as part of the conservative strategy.*Emergency laparoscopic appendicectomy within 6 hours*- **Early appendicitis** benefits from surgery, but an inflammatory mass suggests the process has been ongoing for several days, making **laparoscopy** technically hazardous.- Attempting to dissect the **phlegmon** laparoscopically significantly increases the **conversion rate** to open surgery and the risk of collateral organ damage.*Right hemicolectomy to remove the inflammatory mass*- A **right hemicolectomy** is an aggressive over-treatment for a standard appendiceal mass unless there is clear evidence of **malignancy** or uncontrollable intraoperative complications.- While an **interval appendicectomy** or colonoscopy is necessary later to exclude **caecal carcinoma** in an older patient, it is not performed during the acute inflammatory phase.
Question 117: A 67-year-old woman with a history of multiple previous laparotomies presents with a 48-hour history of colicky central abdominal pain, vomiting, and absolute constipation. On examination, her abdomen is distended with a previous midline surgical scar, and bowel sounds are hyperactive. An erect chest radiograph shows no free air under the diaphragm. CT scan reveals dilated small bowel loops measuring up to 4.5 cm with a transition point and collapsed distal bowel. What is the most appropriate initial management?
A. Emergency laparotomy within 2 hours
B. Conservative management with nasogastric decompression, nil by mouth, and intravenous fluids (Correct Answer)
C. Water-soluble contrast study followed by reassessment at 24 hours
D. Diagnostic laparoscopy within 6 hours
E. Immediate total parenteral nutrition and bowel rest for 72 hours
Explanation: ***Conservative management with nasogastric decompression, nil by mouth, and intravenous fluids***
- The clinical picture of **colicky abdominal pain**, **vomiting**, **absolute constipation**, **abdominal distension**, and **hyperactive bowel sounds** in a patient with a history of **multiple laparotomies** strongly indicates **small bowel obstruction (SBO)**, most likely due to **adhesions**.
- The absence of **free air** on chest radiograph and no clear signs of **bowel ischemia** (e.g., severe tenderness, fever, metabolic acidosis, absent bowel sounds) mean that initial management should be **conservative**, involving **nasogastric decompression**, **nil by mouth**, and **intravenous fluids** to correct fluid and electrolyte imbalances and decompress the bowel, which resolves 70-90% of adhesive SBO cases.
*Emergency laparotomy within 2 hours*
- **Emergency laparotomy** is indicated for signs of **bowel strangulation**, **perforation** (e.g., pneumoperitoneum), or **peritonitis**, none of which are definitively present in this case.
- Proceeding directly to surgery without a trial of conservative management in an uncomplicated adhesive SBO increases the risk of **postoperative complications** and **further adhesion formation**.
*Water-soluble contrast study followed by reassessment at 24 hours*
- A **water-soluble contrast study** (e.g., Gastrografin) can be both diagnostic and potentially therapeutic for adhesive SBO, but it typically follows the initiation of **conservative management**.
- While useful for predicting the need for surgery if the contrast does not reach the colon, it is not the immediate first step for resuscitation and decompression.
*Diagnostic laparoscopy within 6 hours*
- **Laparoscopy** in a patient with **multiple prior laparotomies** and **dilated bowel loops** carries a significantly high risk of **bowel injury** during trocar insertion and can be technically very challenging due to extensive **adhesions**.
- There is no urgent indication of **bowel compromise** that would necessitate immediate invasive diagnostic or therapeutic intervention via laparoscopy.
*Immediate total parenteral nutrition and bowel rest for 72 hours*
- **Total parenteral nutrition (TPN)** is reserved for patients with prolonged inability to absorb nutrients via the enteral route or severe malnutrition, not as an **initial management** for acute SBO.
- The immediate priority is **fluid resuscitation**, **electrolyte correction**, and **bowel decompression** using intravenous fluids and nasogastric suction, rather than complex nutritional support.
Question 118: A 59-year-old man with a history of chronic alcohol excess and previous duodenal ulcer presents with sudden onset severe epigastric pain. Examination reveals a rigid abdomen with absent bowel sounds. Erect chest radiograph shows free gas under the diaphragm. During emergency laparotomy, 1500ml of purulent fluid is aspirated and a 5mm perforation is identified on the anterior wall of the first part of the duodenum with indurated edges. What is the most appropriate surgical management?
A. Simple closure of the perforation with an omental (Graham) patch (Correct Answer)
B. Excision of ulcer with gastroduodenostomy and truncal vagotomy
C. Distal gastrectomy with Billroth II reconstruction
D. Omental patch repair followed by highly selective vagotomy
E. Drainage only with delayed definitive repair after 48 hours of resuscitation
Explanation: ***Simple closure of the perforation with an omental (Graham) patch*** - This is the **standard emergency procedure** for a perforated duodenal ulcer, effectively sealing the defect using a **vascularized omental pedicle** to provide a secure and rapid biological closure. - With the efficacy of **Proton Pump Inhibitors (PPIs)** and **H. pylori eradication**, definitive acid-reducing surgeries are generally not required in the acute setting, making simple closure sufficient for source control.*Excision of ulcer with gastroduodenostomy and truncal vagotomy* - This is a more complex and **major surgical procedure** with increased morbidity, which is inappropriate for an acute, uncomplicated 5mm perforation, especially in the presence of **purulent peritonitis**. - **Truncal vagotomy** is largely obsolete due to its significant side effects, such as **gastric stasis** and **dumping syndrome**, and is not indicated in the emergency management of a perforated ulcer.*Distal gastrectomy with Billroth II reconstruction* - This represents a **highly extensive resectional surgery** far beyond what is necessary for a small 5mm duodenal perforation and carries a **high risk of complications**, particularly **anastomotic leakage** in an infected abdominal cavity. - Such radical procedures are typically reserved for cases of **malignancy** or highly complicated, non-repairable ulcers, not for simple perforation.*Omental patch repair followed by highly selective vagotomy* - While **omental patch repair** is correct, adding a **highly selective vagotomy** in an emergency setting with **peritoneal contamination** is technically challenging, time-consuming, and significantly increases operative risk without immediate benefit. - The primary goal in acute perforation is **source control** and **peritoneal lavage**, not definitive acid-reducing surgery, which can be considered later if clinically indicated.*Drainage only with delayed definitive repair after 48 hours of resuscitation* - **Drainage only** is insufficient for a perforated viscus as it allows continued leakage of gastrointestinal contents, which would exacerbate **peritonitis** and **sepsis**, leading to a worsening clinical picture. - **Immediate surgical repair** and **source control** are paramount in managing perforated hollow viscus to prevent ongoing contamination and are critical for patient survival, making delayed intervention unacceptable.
Question 119: What is the Modified Alvarado Score and what is its primary clinical utility in acute surgical assessment?
A. A scoring system combining clinical, laboratory, and radiological parameters to predict the probability of acute mesenteric ischaemia
B. A clinical scoring system using symptoms, signs, and laboratory values to stratify the probability of acute appendicitis and guide management decisions (Correct Answer)
C. A biochemical score using inflammatory markers to differentiate between complicated and uncomplicated diverticulitis
D. A prognostic index for predicting outcomes in patients with perforated peptic ulcer disease
E. A risk assessment tool for determining the likelihood of malignancy in patients presenting with bowel obstruction
Explanation: ***A clinical scoring system using symptoms, signs, and laboratory values to stratify the probability of acute appendicitis and guide management decisions***- The **Modified Alvarado Score** (MANTRELS) is a well-established clinical scoring system used to assess the likelihood of **acute appendicitis**.- It integrates clinical **symptoms** (e.g., migratory right iliac fossa pain, anorexia, nausea/vomiting), **signs** (e.g., right iliac fossa tenderness, rebound tenderness), and **laboratory values** (e.g., leukocytosis with left shift) to aid in diagnosis and management decisions.*A scoring system combining clinical, laboratory, and radiological parameters to predict the probability of acute mesenteric ischaemia*- **Acute mesenteric ischaemia** is primarily diagnosed using **CT angiography** and clinical evaluation, not the Alvarado score.- Key clinical features for ischaemia include **severe abdominal pain out of proportion** to physical findings, distinct from appendicitis.*A biochemical score using inflammatory markers to differentiate between complicated and uncomplicated diverticulitis*- The differentiation of **diverticulitis** into complicated or uncomplicated forms is primarily based on **CT imaging** findings (e.g., abscess, perforation) and the **Hinchey classification**.- The Alvarado score is specific for **appendicitis** and does not apply to diverticulitis.*A prognostic index for predicting outcomes in patients with perforated peptic ulcer disease*- Prognosis for **perforated peptic ulcer disease** is typically assessed using scores like the **Boey score** or **PULP score**, which consider factors like age, comorbidities, and presence of shock.- The Alvarado score is not used to predict outcomes in perforated peptic ulcers.*A risk assessment tool for determining the likelihood of malignancy in patients presenting with bowel obstruction*- The likelihood of **malignancy** as a cause of **bowel obstruction** is primarily evaluated through **imaging studies** (e.g., CT scans to identify masses or transition zones) and patient history.- The Alvarado score is not designed to assess the risk of malignancy in bowel obstruction.
Question 120: A 67-year-old man undergoes elective right hemicolectomy for caecal carcinoma. Post-operatively, he develops increasing abdominal distension and pain. On day 4 post-operation, abdominal examination reveals a tense, distended abdomen with reduced bowel sounds. CT demonstrates gross dilatation of small bowel loops to the level of the ileocolic anastomosis with no evidence of mechanical obstruction, leak, or collection. What is the most appropriate initial management?
A. Emergency return to theatre for re-exploration and revision of anastomosis
B. Conservative management with nasogastric decompression, nil by mouth, correction of electrolytes, and mobilization (Correct Answer)
C. Commencement of total parenteral nutrition and continued observation
D. Administration of neostigmine infusion under cardiac monitoring
E. Urgent colonoscopic decompression of dilated bowel loops
Explanation: ***Conservative management with nasogastric decompression, nil by mouth, correction of electrolytes, and mobilization*** - This patient presents with **post-operative paralytic ileus**, a common expected complication after abdominal surgery characterized by **bowel loop dilatation** without mechanical obstruction on CT. - Initial management focuses on supportive care, including **IV fluids**, addressing **dyselectrolytemia**, and reducing distension via a **nasogastric tube** until bowel function returns.*Emergency return to theatre for re-exploration and revision of anastomosis* - Re-exploration is not indicated because the **CT scan** explicitly showed **no evidence** of mechanical obstruction, anastomotic leak, or collection. - Surgery in the setting of ileus is unnecessary and may worsen the condition by causing further **peritoneal irritation** and delaying recovery.*Commencement of total parenteral nutrition and continued observation* - **TPN** is generally reserved for patients where the ileus is prolonged, typically lasting more than **5 to 7 days**, and is not an initial management step. - It carries risks such as **catheter-related infections** and metabolic derangements, which should be avoided if conservative measures can resolve the ileus early.*Administration of neostigmine infusion under cardiac monitoring* - **Neostigmine** is used specifically for **Ogilvie's syndrome** (acute colonic pseudo-obstruction) where there is severe colonic dilatation with a high risk of perforation. - This patient has broad **small bowel dilatation**, the typical pattern of ileus, for which neostigmine is not the standard clinical treatment.*Urgent colonoscopic decompression of dilated bowel loops* - **Colonoscopic decompression** is ineffective for managing **small bowel loops**, as the scope cannot reliably or safely reach to decompress the proximal small intestine. - This procedure is indicated for **sigmoid volvulus** or severe colonic pseudo-obstruction, neither of which is consistent with this patient's CT findings.
