Preoperative and Postoperative Care — MCQs

Preoperative and Postoperative Care Indian Medical PG Practice Questions and MCQs

Question 111: In the first week of parenteral nutrition, what is the most likely change in a patient's weight?

A. Overweight
B. Underweight (Correct Answer)
C. Normal weight
D. Variable

Explanation: **Explanation:** The correct answer is **B. Underweight**. In the first week of Total Parenteral Nutrition (TPN), a patient is expected to remain **underweight** or continue to lose a small amount of weight. This is because the primary goal during the initial phase of TPN is to achieve metabolic stability and provide maintenance requirements rather than aggressive weight gain. **Underlying Medical Concept:** During the first week, clinicians must carefully titrate the caloric and fluid load to avoid **Refeeding Syndrome**. Rapid administration of high-glucose loads can lead to a massive insulin surge, causing lethal shifts of potassium, magnesium, and phosphate into the intracellular compartment. Consequently, the caloric intake provided in the first 5–7 days is often below the patient's total energy expenditure, leading to a net negative energy balance and continued weight deficit. True tissue accretion (weight gain) typically begins only after the first week once the patient is metabolically stable. **Analysis of Incorrect Options:** * **A & C (Overweight/Normal weight):** It is physiologically impossible to reverse chronic malnutrition or significant weight loss within seven days. Any rapid weight gain seen in the first week is usually due to **fluid overload** or edema, not an increase in lean body mass. * **D (Variable):** While individual responses differ, the standard clinical progression involves a lag period before anabolic weight gain occurs; therefore, "underweight" is the most predictable state. **High-Yield Clinical Pearls for NEET-PG:** * **Weight Gain Goal:** Once stable (after week 1), the ideal weight gain on TPN is **0.5 to 1.0 kg per week**. * **Refeeding Syndrome:** Characterized by **Hypophosphatemia** (most common), Hypokalemia, and Hypomagnesemia. * **Monitoring:** Daily weights are the best non-invasive way to monitor fluid status in TPN patients. Sudden weight gain (>0.5 kg/day) suggests fluid retention, not nutrition.

Question 112: A client who has undergone a transsphenoidal hypophysectomy should be carefully monitored for hemorrhage. Which of the following signs may indicate such bleeding?

A. Bloody drainage from the ears
B. Frequent swallowing (Correct Answer)
C. Guaiac-positive stools
D. Hematuria

Explanation: ### Explanation **Correct Option: B. Frequent Swallowing** Transsphenoidal hypophysectomy involves an incision through the sphenoid sinus (often via a sublabial or transnasal approach) to reach the pituitary gland. Postoperatively, the most critical site for occult hemorrhage is the posterior nasopharynx. Because the patient is often in a semi-Fowler’s position, blood trickles down the back of the throat. This triggers the swallowing reflex. Therefore, **frequent, repetitive swallowing** is a classic clinical sign of active bleeding in the nasopharynx or oropharynx, even if no external bleeding is visible from the nasal packing. **Analysis of Incorrect Options:** * **A. Bloody drainage from the ears:** This is typically associated with a basilar skull fracture (involving the petrous portion of the temporal bone), not a controlled transsphenoidal surgical approach. * **C. Guaiac-positive stools:** This indicates gastrointestinal bleeding. While stress ulcers can occur post-surgery, it is not a specific sign of immediate postoperative hemorrhage from the surgical site. * **D. Hematuria:** This indicates urinary tract trauma or pathology and is unrelated to a neurosurgical procedure on the pituitary gland. **NEET-PG High-Yield Pearls:** 1. **CSF Rhinorrhea:** Post-hypophysectomy, clear nasal drainage should be tested for **glucose** (using a dipstick) or **Beta-2 transferrin** (most specific) to rule out a CSF leak. 2. **Diabetes Insipidus (DI):** The most common postoperative complication due to manipulation of the posterior pituitary. Monitor for polyuria (>250 ml/hr) and low urine specific gravity (<1.005). 3. **Positioning:** Postoperatively, maintain the head of the bed at **30-45 degrees** to decrease intracranial pressure and prevent tension on the suture line. 4. **Avoidance of Pressure:** Patients must be instructed to avoid coughing, sneezing, or blowing their nose to prevent CSF leaks.

Question 113: Which of the following is a complication of total parenteral nutrition?

A. Congestive Heart Failure (CHF)
B. Hypochloremia
C. Metabolic acidosis (Correct Answer)
D. Leukopenia

Explanation: **Explanation** **Total Parenteral Nutrition (TPN)** is a complex intravenous solution containing glucose, amino acids, lipids, electrolytes, and vitamins. **Why Metabolic Acidosis is the Correct Answer:** Metabolic acidosis is a well-recognized metabolic complication of TPN. It primarily occurs due to two reasons: 1. **Amino Acid Metabolism:** Crystalline amino acid solutions contain hydrochloride salts of basic amino acids (like Arginine, Lysine, and Histidine). When these are metabolized, they release hydrochloric acid, leading to **hyperchloremic metabolic acidosis**. 2. **Excessive Calories:** Overfeeding can lead to increased CO2 production, contributing to respiratory acidosis, while lipid emulsions can occasionally contribute to organic acid accumulation. **Analysis of Incorrect Options:** * **A. Congestive Heart Failure (CHF):** While fluid overload can occur if TPN is administered too rapidly, CHF itself is not a direct metabolic complication of the TPN solution composition. * **B. Hypochloremia:** TPN is more likely to cause **Hyperchloremia** (due to the chloride salts in amino acid solutions) rather than hypochloremia. * **C. Leukopenia:** TPN does not typically suppress the bone marrow. In fact, malnutrition itself causes immune suppression, and TPN aims to restore nutritional status to improve leukocyte function. **High-Yield Clinical Pearls for NEET-PG:** * **Most common metabolic complication:** Hyperglycemia (due to high glucose infusion rates). * **Refeeding Syndrome:** Characterized by **Hypophosphatemia** (most important), Hypokalemia, and Hypomagnesemia when starting TPN in a severely malnourished patient. * **Hepatobiliary complications:** Cholestasis and cholelithiasis are common with long-term TPN use. * **Infectious complications:** Catheter-related bloodstream infections (CRBSI) are the most common non-metabolic complications.

Question 114: What is the earliest sign of volume overload immediately after an operative procedure?

A. Weight gain (Correct Answer)
B. Increased Blood Pressure
C. Peripheral edema
D. Distended neck veins

Explanation: ### Explanation **1. Why Weight Gain is the Correct Answer:** In the immediate postoperative period, **weight gain** is the most sensitive and earliest indicator of fluid accumulation. This occurs because the body begins to retain water and sodium due to the surgical stress response (release of ADH and aldosterone). Even before clinical signs like edema or hypertension manifest, the total body water increases, which is reflected immediately on a weighing scale. A gain of just 500ml to 1L of fluid is detectable as weight gain, whereas other clinical signs require much larger fluid shifts. **2. Why Other Options are Incorrect:** * **Increased Blood Pressure:** Hypertension is a late and unreliable sign. In the early postoperative phase, BP can be influenced by pain, anxiety, or anesthesia recovery, making it non-specific for volume overload. * **Peripheral Edema:** This is a late sign. For peripheral edema to become clinically apparent (pitting), there must typically be an excess of at least **2 to 4 liters** of fluid in the interstitial space. * **Distended Neck Veins:** While an important sign of increased Central Venous Pressure (CVP), it usually occurs after significant intravascular volume expansion and may be masked by the patient’s position or baseline cardiac status. **3. Clinical Pearls for NEET-PG:** * **Gold Standard for Fluid Monitoring:** Daily weight measurement is the most accurate non-invasive way to monitor fluid balance in surgical patients. * **The "Third Space" Rule:** During the first 48 hours post-op, fluid shifts into the interstitial space (third spacing). Weight gain occurs here even if the patient appears intravascularly depleted. * **Post-op Diuresis:** Expect a "diuretic phase" on post-op day 3 as third-space fluid mobilizes back into the circulation. * **High-Yield Fact:** 1 kg of weight gain is roughly equivalent to 1 liter of fluid retention.

Question 115: What is the recommended patient positioning for Ryle's tube insertion?

A. Supine with neck flexed
B. Sitting with neck flexed (Correct Answer)
C. Supine with neck extended
D. Sitting with neck extended

Explanation: **Explanation:** The primary goal during Ryle’s tube (Nasogastric tube) insertion is to facilitate the passage of the tube into the esophagus while preventing accidental entry into the trachea. **Why "Sitting with neck flexed" is correct:** 1. **Sitting/High Fowler’s Position:** Gravity assists the downward passage of the tube and reduces the risk of aspiration if the patient gags or vomits during the procedure. 2. **Neck Flexion (The "Sniffing" or "Chin-to-Chest" position):** Flexing the neck narrows the airway by bringing the larynx forward and opens the esophagus. This mechanical shift makes it easier for the tube to bypass the glottis and enter the posterior esophageal opening. **Analysis of Incorrect Options:** * **Supine with neck flexed (A):** While flexion is good, the supine position increases the risk of aspiration and lacks the gravitational advantage of the sitting position. * **Supine with neck extended (C):** This is the worst position. Extension straightens the path to the trachea, significantly increasing the risk of accidental intubation of the lungs. * **Sitting with neck extended (D):** Although the patient is upright, extension stretches the anterior neck structures, closing the esophageal lumen and directing the tube toward the larynx. **Clinical Pearls for NEET-PG:** * **Length Measurement:** Measure from the **Tip of the nose to the Earlobe to the Xiphoid process** (NEX measurement). * **Gold Standard for Confirmation:** An **X-ray** is the most reliable method to confirm position. * **Bedside Confirmation:** Aspirating gastric contents (pH <5.5) or the "whoosh test" (auscultating air over the epigastrium) are common but less definitive than X-ray. * **Cooperation:** Asking the patient to take small sips of water or swallow during insertion helps close the epiglottis and propel the tube into the esophagus.

Question 116: A 60-year-old male underwent surgery for carcinoma of the caecum with right hemicolectomy. On the fourth postoperative day, the patient develops fever and pain in the legs. What is the most important clinical entity to suspect?

A. Urinary tract infection
B. Intravenous line infection
C. Chest infection
D. Deep vein thrombosis (Correct Answer)

Explanation: ### Explanation The correct answer is **Deep vein thrombosis (DVT)**. **1. Why DVT is the correct suspect:** In the postoperative period, the timing of a fever is a critical diagnostic clue. The "5 W’s" of postoperative fever (Wind, Water, Walking, Wound, Wonder drugs) provide a chronological framework. On **Postoperative Day (POD) 4 to 6**, the most common cause of fever is **"Walking" (Venous Thromboembolism/DVT)**. This patient has multiple risk factors: age (60 years), malignancy (carcinoma of the caecum), and major abdominal surgery. The specific complaint of **leg pain** combined with fever on POD 4 strongly points toward DVT. **2. Analysis of Incorrect Options:** * **A. Urinary Tract Infection (Water):** Typically occurs between **POD 3-5**. While the timing fits, the patient’s primary complaint is leg pain, not dysuria or flank pain. * **B. Intravenous Line Infection:** Usually occurs after **POD 5** (Thrombophlebitis). While it causes localized pain, it is less common than DVT in a major post-surgical oncology patient. * **C. Chest Infection (Wind):** Causes of fever like atelectasis occur early (**POD 1-2**), while pneumonia typically occurs within **POD 1-3**. The absence of respiratory symptoms makes this less likely. **3. Clinical Pearls for NEET-PG:** * **Virchow’s Triad:** Stasis, Hypercoagulability (Malignancy), and Endothelial injury are all present here. * **Homan’s Sign:** Pain in the calf on dorsiflexion of the foot (unreliable but classic for exams). * **Gold Standard Investigation:** Contrast Venography (rarely used now). * **Investigation of Choice:** Duplex Ultrasound (Doppler). * **Prophylaxis:** Early ambulation is the most effective preventive measure. For high-risk patients, LMWH or pneumatic compression devices are used.

Question 117: When the development of a wound seroma is a potential problem after an appendectomy in an obese patient, what is the best effective method of wound management?

A. Closing the wound with a closed suction drain (Correct Answer)
B. Closing the wound with multiple sutures in the subcutaneous tissue
C. Leaving the subcutaneous tissue and skin open to heal by secondary intention
D. Closing the wound over a rubber drain

Explanation: ### Explanation **1. Why Option A is Correct:** In obese patients, the thick layer of subcutaneous fat creates a significant **potential space** after an appendectomy. This space is prone to the accumulation of serum and liquefied fat, leading to a **seroma**. A **closed suction drain** (e.g., Jackson-Pratt) is the most effective management because it actively collapses this potential space by creating negative pressure, continuously removing fluid, and allowing the tissue layers to appose and heal. This significantly reduces the risk of both seroma formation and subsequent surgical site infection (SSI). **2. Why Other Options are Incorrect:** * **Option B:** Placing multiple subcutaneous sutures (dead space closure) is often counterproductive in obese patients. It can cause **fat necrosis** due to ischemia and acts as a foreign body, which actually increases the risk of infection and seroma. * **Option C:** While leaving the wound open (delayed primary closure) is an option for contaminated/dirty wounds (e.g., perforated appendix), it is not the "best" management for a standard seroma risk. It leads to prolonged healing times and increased nursing care. * **Option D:** Rubber drains (e.g., Penrose) are **open drainage systems**. They work by gravity and capillary action but provide a two-way tract that allows bacteria to enter the wound from the skin, increasing the risk of retrograde infection. **3. Clinical Pearls for NEET-PG:** * **Seroma vs. Hematoma:** Seromas are clear/straw-colored fluid collections; hematomas are blood collections. Both increase the risk of infection by acting as a culture medium. * **Closed vs. Open Drains:** Closed suction drains are always preferred over open drains in clean-contaminated surgeries to minimize the risk of exogenous infection. * **Obesity & Surgery:** Obesity is a primary risk factor for "incisional complications" due to poor vascularity of adipose tissue and increased tension on the wound edges.

Question 118: Postoperative hypoparathyroidism-related hypocalcemia usually presents within what timeframe?

A. 48 hours (Correct Answer)
B. 10 days
C. 10 weeks
D. 6 months

Explanation: ### Explanation **Correct Answer: A. 48 hours** **Medical Concept:** Postoperative hypocalcemia is the most common complication following total thyroidectomy or extensive parathyroid surgery. It occurs due to either the accidental removal of the parathyroid glands or, more commonly, transient ischemia caused by disruption of their delicate blood supply (primarily from the inferior thyroid artery). The serum half-life of **Parathyroid Hormone (PTH) is very short (less than 4–10 minutes)**. Once PTH levels drop, the decline in serum calcium follows rapidly. Clinical symptoms of hypocalcemia, such as circumoral paresthesia, carpopedal spasm, or positive Chvostek/Trousseau signs, typically manifest within **24 to 48 hours** post-surgery. If calcium levels remain stable after 72 hours, the risk of developing delayed symptomatic hypocalcemia is significantly lower. **Analysis of Incorrect Options:** * **B. 10 days:** By this time, transient hypoparathyroidism is usually resolving. If hypocalcemia persists or appears this late, it suggests a more permanent issue, but it is not the typical timeframe for the initial presentation. * **C & D (10 weeks / 6 months):** These timeframes define **Permanent Hypoparathyroidism**. If calcium levels do not normalize within 6 months, the condition is considered permanent, requiring lifelong supplementation. **NEET-PG High-Yield Pearls:** * **Earliest Indicator:** A low serum PTH level measured 1–6 hours postoperatively is the most sensitive predictor of post-thyroidectomy hypocalcemia. * **Hungry Bone Syndrome:** In patients with severe preoperative hyperparathyroidism or thyrotoxicosis, rapid calcium drop occurs because the "starved" bones rapidly uptake calcium once PTH/thyroid hormone levels fall. * **Management:** * *Mild/Asymptomatic:* Oral calcium and Vitamin D (Calcitriol). * *Severe/Symptomatic:* Intravenous **Calcium Gluconate** (preferred over calcium chloride as it is less caustic to veins). * **Sign to watch:** **Trousseau’s sign** (carpal spasm induced by BP cuff inflation) is more sensitive and specific than Chvostek’s sign.

Question 119: A patient develops sudden respiratory distress in the postoperative room after thyroid surgery. The dressing is removed and found to be slightly blood-stained with a bulging wound. What is the first action to be taken?

A. Tracheostomy
B. Cricothyroidotomy
C. Laryngoscopy and intubation
D. Remove the stitch and take the patient to the operating theatre (Correct Answer)

Explanation: ### Explanation The clinical presentation of sudden respiratory distress, a bulging wound, and blood-stained dressings following thyroid surgery is a classic description of a **tension hematoma**. **1. Why Option D is Correct:** The primary cause of airway obstruction in this scenario is not internal laryngeal edema, but rather external compression of the trachea by a rapidly expanding hematoma. This leads to venous congestion and secondary laryngeal edema. The **immediate priority** is to relieve the pressure. **Opening the wound sutures (bedside decompression)** instantly evacuates the clot, relieves the tracheal compression, and restores the airway. Once the airway is stabilized, the patient is shifted to the Operating Theatre (OT) for formal exploration and hemostasis. **2. Why Other Options are Incorrect:** * **A & B (Tracheostomy/Cricothyroidotomy):** These are invasive surgical airways. They are technically difficult to perform in this situation because the hematoma distorts the neck anatomy, making the trachea hard to palpate. They are "last resort" measures. * **C (Laryngoscopy and Intubation):** While intubation secures the airway, it is often impossible in this setting due to the severe laryngeal edema and external compression narrowing the glottic opening. Attempting intubation without first decompressing the hematoma wastes critical time. **3. Clinical Pearls for NEET-PG:** * **Most common cause of post-thyroidectomy hematoma:** Slippage of a ligature on the **Superior Thyroid Artery**. * **Timing:** Usually occurs within the first 6–24 hours post-surgery. * **Management Algorithm:** 1. **Step 1:** Immediate bedside removal of skin and deep fascia sutures (Decompression). 2. **Step 2:** Oxygenation/Intubation (if needed). 3. **Step 3:** Return to OT for ligation of the bleeding vessel. * **Key Sign:** "Bulging wound" or "Increasing neck circumference" + Respiratory distress.

Question 120: In patients depending entirely on parenteral fluids, what is the expected daily weight loss?

A. 50 gm
B. 150 gm (Correct Answer)
C. 200 gm
D. 250 gm

Explanation: ### Explanation In patients receiving maintenance parenteral fluids (without supplemental nutrition), the body enters a state of **obligatory catabolism**. Even with adequate hydration and electrolyte replacement, the lack of sufficient caloric intake leads to the breakdown of endogenous glycogen and muscle protein to meet metabolic demands. **The Correct Answer: B (150 gm)** The expected daily weight loss in a patient on standard parenteral fluids is approximately **150 to 250 grams**. This weight loss is primarily due to the mobilization of fat and lean body mass. In the context of NEET-PG and standard surgical textbooks (like Bailey & Love), **150 gm/day** is the classic figure cited for a patient receiving basic intravenous maintenance (e.g., 5% Dextrose) which provides minimal calories but spares some protein. **Analysis of Incorrect Options:** * **A (50 gm):** This is too low. Such minimal weight loss is only seen in patients receiving near-total nutritional support (TPN). * **C & D (200 gm & 250 gm):** While 250 gm is often considered the upper limit of "acceptable" daily weight loss in these patients, 150 gm is the most frequently tested baseline value for the *minimum* expected loss in a stable, non-septic patient. If weight loss exceeds **500 gm/day**, it usually indicates significant fluid loss (dehydration) rather than just tissue catabolism. **High-Yield Clinical Pearls for NEET-PG:** * **Protein Sparing:** Administering at least **100 grams of glucose** per day intravenously can reduce the rate of muscle protein breakdown (protein-sparing effect). * **Fluid vs. Tissue Loss:** Sudden weight changes (>0.5 kg/day) are almost always due to **fluid shifts** (diuresis or edema) rather than nutritional status. * **Starvation Response:** In simple starvation, the brain eventually adapts to use **ketone bodies**, reducing the requirement for gluconeogenesis from muscle protein. * **Hypermetabolism:** In cases of severe sepsis or major burns, weight loss can be significantly higher due to an accelerated metabolic rate.

Practice by Chapter

Preoperative Risk Assessment

Practice Questions

Perioperative Management of Comorbidities

Practice Questions

Preparation of Patient for Surgery

Practice Questions

Informed Consent Process

Practice Questions

Post-Anesthesia Care

Practice Questions

Pain Management

Practice Questions

Wound Care and Dressings

Practice Questions

Drain Management

Practice Questions

Postoperative Complications Detection

Practice Questions

Early Ambulation and Rehabilitation

Practice Questions

Enhanced Recovery After Surgery (ERAS) Protocols

Practice Questions

Discharge Planning and Follow-up

Practice Questions

Want unlimited practice?

Get full access to all questions, explanations, and performance tracking.

Start For Free