Preoperative Optimization — MCQs

10 questions

What should be the minimum value of HbA1c to safely carry out a surgical procedure in an emergency setting?

Which of the following is not a component of damage control surgery?

Nil per oral orders for an 8-year-old child posted for elective nasal polyp surgery at 8 AM include all of the following EXCEPT:

A patient with a non-obstructing carcinoma of the sigmoid colon is being prepared for elective resection. To minimize the risk of postoperative infectious complications, what should be included in your planning?

What is the correct sequence of medication administration for pre-operative prophylaxis in pheochromocytoma?

Patients who need surgery within 24 hours are categorized under which color category in a disaster management triage?

Which one of the following is not a component of THORACOSCORE?

45 year old woman is posted for elective incisional hernia repair. On reviewing her history, she is known hypertensive patient for the past 10 years on regular captopril. What is your concern for the patient

All of the following are indicators of adequacy of pre-operative resuscitation except

Q10

A meta-analysis comparing ERAS versus traditional perioperative care shows 30% reduction in length of stay and 50% reduction in complications without increase in readmission rates. However, implementation costs are 20% higher initially. As a department head, how should you evaluate the adoption of ERAS protocol?

Preoperative Optimization Indian Medical PG Practice Questions and MCQs

Question 1: What should be the minimum value of HbA1c to safely carry out a surgical procedure in an emergency setting?

A. <7
B. <8
C. <10 (Correct Answer)
D. <8

Explanation: ***<10*** - In an **emergency setting**, the priority is to proceed rapidly with surgery; current guidelines suggest that an **HbA1c <10%** is acceptable to proceed without significant delay for optimization. - While lower HbA1c is ideal, delaying an emergency procedure to achieve an HbA1c below 10% is generally **not recommended**, as the benefits of urgent surgery outweigh the risks associated with this level of glycemic control [1]. *<7* - An HbA1c of **<7% is the general target** for optimal glycemic control in most diabetic patients, especially in an elective setting. - Achieving this level in an emergency would likely require **delaying surgery**, which is not feasible or safe when immediate intervention is needed. *<8* - An HbA1c of **<8%** represents good control for many individuals, particularly older adults or those with comorbidities. - While better than 10%, it is not the absolute minimum required to proceed with an **emergency surgery**, as timely intervention is paramount. *<8* - An HbA1c of **<8%** represents good control for many individuals, particularly older adults or those with comorbidities. - While better than 10%, it is not the absolute minimum required to proceed with an **emergency surgery**, as timely intervention is paramount.

Question 2: Which of the following is not a component of damage control surgery?

A. Control of contamination
B. Control of hemorrhage
C. Definitive repair (Correct Answer)
D. Temporary closure

Explanation: ***Definitive repair*** - **Damage control surgery** is a staged approach for severely injured patients, prioritizing stabilization over complete repair. - **Definitive repair** is the goal of the final stage, after the patient's physiological status has improved, not an initial component. *Control of contamination* - This is a crucial early step in damage control surgery to prevent **sepsis** and further physiological deterioration. - It involves measures like **bowel repair** or diversion, and thorough abdominal lavage. *Control of hemorrhage* - This is the **primary immediate goal** of damage control surgery, often achieved through packing or temporary shunts. - Uncontrolled bleeding leads to the **lethal triad** of coagulopathy, hypothermia, and acidosis. *Temporary closure* - After addressing immediate life-threatening issues, the abdomen or other body cavity is temporarily closed to prevent **abdominal compartment syndrome**. - This allows time for patient resuscitation and correction of physiological derangements before definitive repair.

Question 3: Nil per oral orders for an 8-year-old child posted for elective nasal polyp surgery at 8 AM include all of the following EXCEPT:

A. Apple juice can be taken at 10 PM previous night
B. Milk can be taken at 7 AM in morning (Correct Answer)
C. Can take sips of water up to 6 AM in morning
D. Rice can be consumed at 11 PM previous night

Explanation: **Milk can be taken at 7 AM in morning** - For an 8-year-old undergoing elective surgery at 8 AM, **milk is considered a solid or heavy fluid** and should be stopped at least **6 hours pre-operatively**. - Taking milk at 7 AM, just one hour before surgery, significantly increases the risk of **pulmonary aspiration** during anesthesia. *Apple juice can be taken at 10 PM previous night* - **Clear liquids**, such as apple juice, can generally be consumed up to **2 hours before surgery** in children. - Taking apple juice at 10 PM the night before for an 8 AM surgery falls well within the safe fasting window for clear liquids. *Can take sips of water up to 6 AM in morning* - **Sips of water** are considered a clear liquid and can be consumed up to **2 hours before surgery** in children. - Allowing water until 6 AM for an 8 AM surgery is appropriate and helps prevent dehydration without increasing aspiration risk. *Rice can be consumed at 11 PM previous night* - **Solid foods**, like rice, require a longer fasting period, typically at least **6-8 hours before surgery**. - Consuming rice at 11 PM the night before, for an 8 AM surgery, allows for sufficient gastric emptying and is generally safe.

Question 4: A patient with a non-obstructing carcinoma of the sigmoid colon is being prepared for elective resection. To minimize the risk of postoperative infectious complications, what should be included in your planning?

A. Postoperative administration for 5 to 7 days of parenteral antibiotics effective against aerobes and anaerobes
B. A single preoperative parenteral dose of antibiotic effective against aerobes and anaerobes may provide initial coverage. (Correct Answer)
C. Postoperative administration for 2 to 4 days of parenteral antibiotics effective against aerobes and anaerobes
D. Avoidance of oral antibiotics to prevent emergence of Clostridioides difficile

Explanation: ***Single preoperative parenteral dose of antibiotic effective against aerobes and anaerobes*** - For **elective colorectal surgery**, a single dose of a **broad-spectrum parenteral antibiotic** administered within 60 minutes prior to incision is the standard of care to reduce surgical site infections. - This approach ensures adequate drug levels in the tissues during the period of potential bacterial contamination and is a cornerstone of modern surgical prophylaxis. - Current guidelines (WHO, SCIP) recommend a single preoperative dose, which may be redosed intraoperatively if the procedure is prolonged beyond 3-4 hours. *Avoidance of oral antibiotics to prevent emergence of Clostridioides difficile* - This is **incorrect**. **Oral antibiotics** (such as neomycin and metronidazole) are routinely used preoperatively in conjunction with mechanical bowel preparation for colorectal surgery to reduce intraluminal bacterial load. - The concern for *Clostridioides difficile* infection is generally low with short-term, targeted prophylactic antibiotic regimens compared to broad-spectrum, prolonged use. - The combination of oral and parenteral antibiotics has been shown to further reduce surgical site infections. *Postoperative administration for 5 to 7 days of parenteral antibiotics* - **Prolonged postoperative antibiotic administration** beyond 24 hours in uncomplicated cases is not recommended as it increases the risk of **antibiotic resistance**, *C. difficile* infection, and adverse drug reactions without additional benefit. - The goal of prophylactic antibiotics is to cover the period of contamination during surgery, not to treat presumed ongoing infection postoperatively. *Postoperative administration for 2 to 4 days of parenteral antibiotics* - While administration for up to 24 hours post-operatively may be considered in some high-risk cases, routine **prolonged postoperative antibiotics** (2-4 days) are unnecessary for most elective colorectal resections. - Evidence suggests that continuing antibiotics beyond the immediate perioperative period does not further reduce the incidence of **surgical site infections** in clean-contaminated surgeries.

Question 5: What is the correct sequence of medication administration for pre-operative prophylaxis in pheochromocytoma?

A. Beta blockade followed by alpha blockade
B. Simultaneous alpha and beta blockade
C. Alpha blockade followed by beta blockade (Correct Answer)
D. Alpha blockade only

Explanation: ***Alpha blockade followed by beta blockade*** - **Alpha blockade** should always be initiated first to control **hypertension** and prevent a **hypertensive crisis** during surgery. This is critical because pheochromocytoma causes excessive catecholamine release, leading to profound vasoconstriction. - **Beta blockade** is then added only after adequate alpha blockade has been achieved to control **tachycardia** and arrhythmias, preventing **unopposed alpha-adrenergic stimulation** which could paradoxically worsen hypertension. *Simultaneous alpha and beta blockade* - Administering both simultaneously is dangerous because **beta blockade** can mask the effects of inadequate alpha blockade. - This can lead to **unopposed alpha-adrenergic stimulation** after beta blockade, causing severe **vasoconstriction** and hypertensive crisis. *Beta blockade followed by alpha blockade* - Initiating with **beta blockade** without prior **alpha blockade** is absolutely contraindicated in pheochromocytoma. - This can lead to severe and potentially fatal **hypertension** due to **unopposed alpha-adrenergic stimulation** as beta blockade prevents vasodilation. *Alpha blockade only* - While essential for initial management, **alpha blockade alone** might not fully control all symptoms, especially **tachycardia** and **arrhythmias** caused by high circulating catecholamine levels. - Adding a **beta blocker** after achieving adequate alpha blockade helps in controlling these cardiac effects, optimizing patient preparation for surgery.

Question 6: Patients who need surgery within 24 hours are categorized under which color category in a disaster management triage?

A. Green
B. Yellow (Correct Answer)
C. Blue
D. Black

Explanation: ***Yellow*** - Patients in the **yellow category** are those who require **significant medical attention** and intervention, such as surgery, but whose condition is stable enough to withstand a delay of a few hours up to 24 hours without immediate threat to life or limb. - This category indicates a **delayed but urgent need** for treatment, distinguishing them from immediate (red) or minor (green) cases. *Blue* - The color **blue** is generally **not a standard triage category** in most commonly used disaster protocols (e.g., START, JumpSTART). - Triage systems typically use red, yellow, green, and black to prioritize patients based on immediate medical need and prognosis. *Green* - The **green category** is for patients with **minor injuries** who are considered "walking wounded" and can often wait for treatment for several hours, sometimes up to a few days. - These individuals are **stable** and do not require immediate intervention to preserve life or limb. *Black* - The **black category** is reserved for individuals who are **deceased** or have injuries so severe that survival is unlikely given the available resources, often implying **palliative care** rather than active life-saving interventions in a mass casualty event. - This category signifies that resources would be better allocated to patients with a higher chance of survival.

Question 7: Which one of the following is not a component of THORACOSCORE?

A. Performance status
B. Complication of surgery (Correct Answer)
C. Priority of surgery
D. ASA grading

Explanation: ***Complication of surgery*** - THORACOSCORE is a **risk prediction model** for thoracic surgery used to estimate the *probability of mortality and significant morbidity*, but it does not account for the complications of surgery itself as a component. - The score uses **pre-operative patient characteristics** and co-morbidities to predict outcomes, not post-operative events. *Performance status* - **Performance status**, such as the **ECOG scale**, is a crucial component of THORACOSCORE, reflecting the patient's general health and functional capacity prior to surgery. - A lower performance status (indicating poorer functional ability) increases the predicted risk in THORACOSCORE. *Priority of surgery* - The **priority of surgery** (e.g., elective, urgent, emergency) is an important factor in THORACOSCORE, as emergency procedures generally carry a higher risk. - This variable helps to capture the urgency and associated physiological stress on the patient at the time of presentation for surgery. *ASA grading* - The **American Society of Anesthesiologists (ASA) physical status classification system** is a component of THORACOSCORE, assessing the patient's overall health status and anesthetic risk. - A higher ASA grade (indicating more severe systemic disease) contributes to a higher predicted risk in the THORACOSCORE model.

Question 8: 45 year old woman is posted for elective incisional hernia repair. On reviewing her history, she is known hypertensive patient for the past 10 years on regular captopril. What is your concern for the patient

A. Stop captopril a week before surgery and switch to a calcium channel blocker like amlodipine.
B. Stop captopril a week before surgery and restart only if needed.
C. Stop captopril one day before surgery to prevent intraoperative hypotension.
D. Continue captopril until the day of surgery to maintain blood pressure control. (Correct Answer)

Explanation: ***Continue captopril until the day of surgery to maintain blood pressure control.*** - Maintaining **blood pressure control** is crucial in hypertensive patients undergoing surgery to prevent perioperative cardiovascular events. - **Captopril**, an ACE inhibitor, helps manage chronic hypertension, and discontinuing it without a strong indication could lead to a **rebound hypertensive crisis**. *Stop captopril one day before surgery to prevent intraoperative hypotension.* - While ACE inhibitors can cause **hypotension** under anesthesia, the risk of **uncontrolled hypertension** from stopping it acutely may outweigh this concern for elective surgery. - Recent guidelines often recommend **continuing ACE inhibitors** until the day of surgery, especially for patients with well-controlled hypertension. *Stop captopril a week before surgery and switch to a calcium channel blocker like amlodipine.* - Switching medications a week before surgery introduces a new variable that might not be fully monitored, potentially leading to **unpredictable blood pressure responses**. - There is no strong evidence to suggest that switching to a **calcium channel blocker** offers a significant advantage over continuing a stable ACE inhibitor immediately before elective surgery. *Stop captopril a week before surgery and restart only if needed.* - Discontinuing captopril a week in advance without substituting it would leave the patient's **hypertension untreated** for an extended period, increasing the risk of adverse cardiovascular events. - **Abrupt cessation** of antihypertensive medication can lead to poorer outcomes, including **hypertensive crisis**, particularly with short-acting medications like captopril.

Question 9: All of the following are indicators of adequacy of pre-operative resuscitation except

A. Hematocrit level
B. Consciousness level
C. C-reactive protein level (Correct Answer)
D. Urine output

Explanation: ***C-reactive protein level*** - **C-reactive protein (CRP)** is an inflammatory marker and is not a direct indicator of the adequacy of pre-operative fluid and hemodynamic resuscitation. An elevated CRP suggests ongoing inflammation or infection, not necessarily a deficit in perfusion or hydration. - While inflammation can coincide with critical illness requiring resuscitation, CRP itself does not provide real-time information about **organ perfusion**, **oxygen delivery**, or **fluid status**. *Hematocrit level* - **Hematocrit** levels are crucial for assessing factors like **blood loss** and **hemoconcentration**, which directly impact the need for and adequacy of resuscitation. An increasing hematocrit can indicate hemoconcentration, while a decreasing hematocrit may suggest blood loss. - It helps guide decisions regarding **blood product transfusions** and overall fluid management. *Consciousness level* - The **level of consciousness** is a vital clinical indicator of **cerebral perfusion** and overall brain oxygenation. Deterioration can signal inadequate resuscitation and poor cerebral blood flow. - Improvements in consciousness level after interventions suggest improved **systemic perfusion** and oxygen delivery to the brain. *Urine output* - **Urine output** is a sensitive and widely used indicator of **renal perfusion** and overall systemic hydration status. Adequate urine output (e.g., >0.5 mL/kg/hr) suggests sufficient renal blood flow. - Low or absent urine output can indicate **hypovolemia**, **poor cardiac output**, or **renal hypoperfusion**, highlighting the need for further resuscitation.

Question 10: A meta-analysis comparing ERAS versus traditional perioperative care shows 30% reduction in length of stay and 50% reduction in complications without increase in readmission rates. However, implementation costs are 20% higher initially. As a department head, how should you evaluate the adoption of ERAS protocol?

A. Reject ERAS due to higher initial costs affecting hospital budget
B. Wait for more evidence before implementation
C. Adopt ERAS based on superior clinical outcomes and likely long-term cost savings from reduced complications (Correct Answer)
D. Implement ERAS only for low-risk patients to minimize costs

Explanation: ***Adopt ERAS based on superior clinical outcomes and likely long-term cost savings from reduced complications*** - Significant reductions in **length of stay (30%)** and **complications (50%)** provide strong evidence for the clinical superiority of **ERAS protocols** over traditional care. - The initial 20% cost increase is often offset by **long-term savings** gained from fewer hospital days and reduced management of postoperative complications. *Reject ERAS due to higher initial costs affecting hospital budget* - Focusing solely on **upfront costs** ignores the substantial economic benefit derived from **resource optimization** and beds being freed faster. - High-value healthcare prioritizes **outcomes per dollar spent**, and ERAS typically demonstrates a high **return on investment**. *Wait for more evidence before implementation* - Current **meta-analysis data** already provides high-level evidence regarding its efficacy in improving **surgical recovery**. - Delaying implementation based on sufficient existing evidence prevents patients from accessing safer, **evidence-based clinical pathways**. *Implement ERAS only for low-risk patients to minimize costs* - **ERAS protocols** are designed to be multi-modal and often provide the greatest absolute benefit to **high-risk patients** who are prone to complications. - Restricting the protocol limits the overall **scale of improvement** in hospital-wide metrics like **readmission rates** and total surgical volume.

Want unlimited practice?

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

Start For Free