Preoperative and Postoperative Care Practice Questions

Q: Which of the following is NOT a complication of massive blood transfusion?

Hyperthermia. ### Explanation **Massive Blood Transfusion (MBT)** is defined as the replacement of >10 units of PRBCs in 24 hours or 1 blood volume in 24 hours. **Why Hyperthermia is the Correct Answer:** Massive transfusion typically leads to **Hypothermia**, not hyperthermia. This occurs because stored blood is kept at 4°C. Rapid infusion of large volumes of cold blood overrides the body’s thermoregulatory mechanisms, shifting the oxyhemoglobin dissociation curve to the left and potentially causing cardiac arrhythmias. **Analysis of Incorrect Options:** * **Septicemia:** Every unit of blood carries a risk of bacterial contamination (more common in platelets due to room temperature storage). In MBT, the sheer volume and multiple donors significantly increase the cumulative risk of transfusion-transmitted infections and sepsis. * **Thrombocytopenia:** Stored whole blood or PRBCs are deficient in viable platelets and clotting factors (V and VIII). Large-scale replacement with deficient blood leads to **dilutional thrombocytopenia** and coagulopathy. * **ARDS:** This can occur as part of **TRALI (Transfusion-Related Acute Lung Injury)**, a leading cause of transfusion-related mortality. It involves donor antibodies reacting against recipient neutrophils, leading to non-cardiogenic pulmonary edema. **High-Yield Clinical Pearls for NEET-PG:** * **Electrolyte Triad of MBT:** Hypocalcemia (citrate toxicity), Hyperkalemia (leaking from stored RBCs), and Metabolic Alkalosis (citrate converted to bicarbonate). * **Hypocalcemia:** Citrate used as an anticoagulant binds to the patient's ionized calcium. * **Lethal Triad of Trauma:** Hypothermia, Acidosis, and Coagulopathy (all exacerbated by MBT). * **Management:** Use blood warmers and follow a **1:1:1 ratio** (PRBC:FFP:Platelets) to prevent dilutional coagulopathy.

Q: A patient who underwent a Billroth II gastrectomy for peptic ulcer disease presents with postprandial pain. Endoscopy reveals oedematous and inflamed gastric mucosa. What is the most likely diagnosis?

Alkaline gastritis. **Explanation:** **Alkaline Reflux Gastritis (Bile Reflux Gastritis)** is a common complication following gastric surgeries that bypass or destroy the pylorus, such as the **Billroth II gastrectomy**. 1. **Why it is correct:** In a Billroth II reconstruction, the pylorus is removed, allowing the alkaline contents of the duodenum (bile, pancreatic enzymes, and succus entericus) to reflux freely into the gastric remnant. This chronic exposure to bile acids and lysolecithin strips the protective gastric mucosal barrier, leading to chemical injury. Clinically, this presents as **postprandial epigastric pain** (often not relieved by vomiting) and weight loss. Endoscopically, the hallmark is **beefy red, oedematous, and inflamed gastric mucosa**. 2. **Why other options are wrong:** * **Dumping Syndrome:** Presents with vasomotor symptoms (palpitations, sweating, dizziness) and abdominal cramping/diarrhea shortly after meals due to rapid gastric emptying. It does not typically show inflammatory changes on endoscopy. * **Gastroparesis:** Refers to delayed gastric emptying. While it causes postprandial fullness and vomiting, it is characterized by retained food material rather than specific mucosal inflammation. **High-Yield Clinical Pearls for NEET-PG:** * **Classic Triad:** Postprandial epigastric pain, bile reflux/vomiting, and weight loss. * **Key Distinction:** Unlike peptic ulcer pain, the pain of alkaline gastritis is typically **not relieved** by antacids or vomiting. * **Treatment:** Medical management with bile acid sequestrants (Cholestyramine) is often ineffective. The definitive surgical treatment is a **Roux-en-Y gastrojejunostomy**, which diverts bile 40–60 cm away from the gastric remnant.

Q: What is the most common coagulopathy noted in surgical patients?

Thrombocytopenia. **Explanation:** **Thrombocytopenia (Option A)** is the most common coagulopathy encountered in surgical patients. In the perioperative setting, a drop in platelet count is frequently observed due to several factors: 1. **Hemodilution:** Large-volume fluid resuscitation or massive blood transfusions (using stored blood deficient in viable platelets) dilute the existing platelet concentration. 2. **Consumption:** Increased utilization of platelets at the site of surgical trauma or due to systemic inflammatory response syndrome (SIRS). 3. **Sequestration:** Splenic sequestration or drug-induced destruction (e.g., Heparin-Induced Thrombocytopenia). **Analysis of Incorrect Options:** * **Afibrinogenemia (Option B):** This is a rare congenital or acquired condition. While fibrinogen levels can drop during massive hemorrhage (consumptive coagulopathy), it is far less common than a decrease in platelet count. * **Fibrinolysis (Option C):** Primary fibrinolysis is rare. Secondary fibrinolysis occurs in Disseminated Intravascular Coagulation (DIC), which is a severe complication but not the most common baseline coagulopathy. * **Factor VIII Deficiency (Option D):** This refers to Hemophilia A, an inherited disorder. While significant for surgery, it is a specific genetic condition rather than a common perioperative finding. **High-Yield Clinical Pearls for NEET-PG:** * **Massive Transfusion:** Defined as the replacement of >1 blood volume in 24 hours. The most common complication is **dilutional thrombocytopenia**. * **Platelet Thresholds:** For most major surgeries, a platelet count of **>50,000/µL** is required. For neurosurgery or ophthalmic surgery, **>100,000/µL** is preferred. * **Storage:** Platelets are stored at room temperature (20-24°C) with constant agitation and have a shelf life of only 5 days.

Q: A 66-year-old female is scheduled for subtotal gastrectomy for adenocarcinoma. What is an important procedure-related complication?

Bilious vomiting. **Explanation:** **Subtotal gastrectomy** involves the resection of the distal portion of the stomach followed by reconstruction, typically via a **Billroth II (gastrojejunostomy)** or **Roux-en-Y** procedure. **Why Bilious Vomiting is Correct:** Bilious vomiting is a classic procedure-related complication following gastric surgery, often associated with **Afferent Loop Syndrome** or **Bile Reflux Gastritis**. 1. **Afferent Loop Syndrome:** Occurs in Billroth II reconstructions when the afferent limb (the segment of duodenum and jejunum proximal to the anastomosis) becomes partially obstructed. Bile and pancreatic secretions accumulate, causing distension and pain, which is relieved by forceful, projectile vomiting of bile-stained fluid (characteristically without food). 2. **Bile Reflux Gastritis:** The removal of the pylorus allows alkaline duodenal contents (bile) to reflux into the stomach remnant, causing mucosal irritation and chronic bilious vomiting. **Analysis of Incorrect Options:** * **A. Pneumothorax:** While a potential risk in thoracic or high abdominal surgeries (if the diaphragm is breached), it is not a specific or common complication of a subtotal gastrectomy. * **B. Constipation:** Postoperative patients are more likely to experience **diarrhea** (e.g., post-vagotomy diarrhea or dumping syndrome) rather than constipation. * **C. Hemolytic anemia:** Gastrectomy leads to **Megaloblastic anemia** (due to loss of Intrinsic Factor and Vitamin B12 deficiency) or **Iron deficiency anemia**, not hemolysis. **High-Yield NEET-PG Pearls:** * **Dumping Syndrome:** The most common post-gastrectomy complication; managed initially with small, dry, low-carb meals. * **Early vs. Late Dumping:** Early (vasomotor symptoms 20-30 mins post-meal); Late (hypoglycemia 2-3 hours post-meal). * **Roux-en-Y Reconstruction:** Preferred over Billroth II to prevent bile reflux because it diverts biliary secretions further downstream.

Q: Which of the following agents is of no value in the postoperative care of a hemophilic patient?

Clopidogrel. ### Explanation **Core Concept:** Hemophilia is a congenital bleeding disorder characterized by a deficiency of clotting factors (Factor VIII in Hemophilia A; Factor IX in Hemophilia B). The primary goal of postoperative care is to **maintain hemostasis** and prevent secondary hemorrhage. **Why Clopidogrel is the Correct Answer:** Clopidogrel is an **antiplatelet agent** that irreversibly inhibits the P2Y12 ADP receptor on platelets. In a hemophilic patient, the coagulation cascade is already compromised. Administering an antiplatelet drug like Clopidogrel would further impair primary hemostasis, significantly **increasing the risk of life-threatening bleeding**. It has no therapeutic value in managing hemophilia and is actually contraindicated in the perioperative period for these patients. **Analysis of Other Options:** * **Tranexamic Acid & Aminocaproic Acid (Options A & C):** These are **antifibrinolytic agents**. They inhibit plasminogen activation, thereby stabilizing clots. They are highly valuable in hemophilic patients, especially after dental extractions or mucosal surgeries, to prevent clot lysis. * **Factor VIII Cryoprecipitate (Option D):** Cryoprecipitate is rich in Factor VIII, von Willebrand factor, and fibrinogen. While recombinant Factor VIII concentrate is now the gold standard, cryoprecipitate remains a source of Factor VIII to correct the underlying deficiency and ensure surgical hemostasis. **High-Yield Clinical Pearls for NEET-PG:** * **Target Levels:** For major surgery in Hemophilia A, Factor VIII levels should be raised to **80-100%** preoperatively and maintained above 50% for 10-14 days postoperatively. * **Desmopressin (DDAVP):** Useful in **Mild Hemophilia A** as it releases endogenous Factor VIII stores; it is ineffective in Hemophilia B. * **Contraindication:** Avoid **IM injections** and **NSAIDs/Aspirin** in hemophilic patients due to the risk of hematomas and platelet dysfunction.

Q: Hyponatremia in multiple myeloma is considered:

Pseudo. **Explanation:** The correct answer is **Pseudohyponatremia**. This occurs due to the **"solvent exclusion effect."** In Multiple Myeloma, there is a pathological increase in plasma proteins (monoclonal gammopathy). 1. **Why it is Pseudo:** Plasma is composed of roughly 93% water and 7% lipids/proteins. Sodium is dissolved only in the water phase. In Multiple Myeloma, the massive increase in paraproteins expands the non-aqueous fraction of the plasma volume. When laboratory analyzers (specifically indirect potentiometry) measure sodium, they calculate it based on the *total* volume of plasma rather than the *water* volume, leading to a falsely low sodium reading despite normal serum osmolality. 2. **Why other options are wrong:** * **True/Absolute:** These imply a genuine deficit of sodium or an excess of water (hypotonic state). In myeloma, the actual concentration of sodium in plasma water remains normal. * **Relative:** This usually refers to dilutional hyponatremia (e.g., SIADH or CHF), where water retention outweighs sodium, which is not the primary mechanism here. **NEET-PG High-Yield Pearls:** * **Causes of Pseudohyponatremia:** Hyperproteinemia (Multiple Myeloma, IVIG therapy) and Hyperlipidemia (Chylomicronemia). * **Diagnosis:** If pseudohyponatremia is suspected, check **Serum Osmolality**. It will be **normal** (275–295 mOsm/kg). * **Lab Tip:** To avoid this error, use **Direct Potentiometry** (Blood Gas Analyzers), which measures sodium activity in the water phase directly and is not affected by protein levels. * **Hyperglycemia** causes "Translocational Hyponatremia" (Hypertonic), not pseudohyponatremia. For every 100 mg/dL rise in glucose, sodium drops by ~1.6 mEq/L.

Question 1

Which of the following is NOT a complication of massive blood transfusion?

Accepted Answer

Hyperthermia

Answer

Septicemia

Answer

Thrombocytopenia

Answer

ARDS

Question 2

A patient who underwent a Billroth II gastrectomy for peptic ulcer disease presents with postprandial pain. Endoscopy reveals oedematous and inflamed gastric mucosa. What is the most likely diagnosis?

Accepted Answer

Alkaline gastritis

Answer

Dumping syndrome

Answer

Gastroparesis

Answer

None of the above

Question 3

Prolonged postoperative ileus is best treated by?

Accepted Answer

Laparotomy and exploration

Answer

Long tube insertion

Answer

Calcium pantothenate

Answer

Peristaltic stimulants

Question 4

A 67-year-old male weighing 60 kg, with a history of perforated diverticulitis requiring emergency laparotomy and sigmoid resection, has been in the ICU for a week. His serum albumin is 1.1 g/dL, and he was recently weaned from mechanical ventilation. The patient's colostomy is not functioning. Total parenteral nutrition (TPN) was initiated to provide 1800 kcal/24 h. Two days later, the patient develops respiratory distress necessitating reintubation and mechanical ventilation. Which serum electrolyte level should be checked?

Accepted Answer

Phosphate

Answer

Magnesium

Answer

Calcium

Answer

Selenium

Question 5

What is the most common coagulopathy noted in surgical patients?

Accepted Answer

Thrombocytopenia

Answer

Afibrinogenemia

Answer

Fibrinolysis

Answer

Factor VIII deficiency

Question 6

Which of the following are contraindications for enteral nutrition?

Accepted Answer

Intestinal obstruction, Severe pancreatitis, Severe diarrhea, Intestinal fistula

Answer

Intestinal obstruction, Severe pancreatitis, Severe diarrhea

Answer

Intestinal obstruction, Severe diarrhea, Inflammatory Bowel Disease

Answer

Intestinal obstruction, Severe diarrhea, Intestinal fistula

Question 7

A 75-year-old man with a history of myocardial infarction 2 years ago, peripheral vascular disease with symptoms of claudication after walking half a block, hypertension, and diabetes presents with a large ventral hernia. He wishes to have the hernia repaired. Which of the following is the most appropriate next step in his preoperative workup?

Accepted Answer

He should undergo a persantine thallium stress test and echocardiography.

Answer

He should undergo an electrocardiogram (ECG).

Answer

He should undergo an exercise stress test.

Answer

He should undergo coronary artery bypass prior to operative repair of his ventral hernia.

Question 8

A 66-year-old female is scheduled for subtotal gastrectomy for adenocarcinoma. What is an important procedure-related complication?

Accepted Answer

Bilious vomiting

Answer

Pneumothorax

Answer

Constipation

Answer

Hemolytic anemia

Question 9

Which of the following agents is of no value in the postoperative care of a hemophilic patient?

Accepted Answer

Clopidogrel

Answer

Tranexamic acid

Answer

Aminocaproic Acid

Answer

Factor VIII Cryoprecipitate

Question 10

Hyponatremia in multiple myeloma is considered:

Accepted Answer

Pseudo

Answer

True

Answer

Relative

Answer

Absolute

Preoperative and Postoperative Care — MCQs

Preoperative and Postoperative Care — MCQs

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