Preoperative and Postoperative Care

Preoperative and Postoperative Care Indian Medical PG Question 1: A 63-year-old man presents for an elective laparoscopic cholecystectomy. He is obese, has angina at rest, and chronic obstructive pulmonary disease (COPD). Which of the following would be his American society of Anesthesiologists (ASA) physical status classification

• A. ASA II
• B. ASA I
• C. ASA IV
• D. ASA III (Correct Answer)

Preoperative and Postoperative Care Explanation: ***ASA III*** - This patient has **severe systemic disease** (angina at rest, COPD, obesity) that limits activity but is not incapacitating, aligning with the criteria for **ASA III**. - **Angina at rest** and **chronic obstructive pulmonary disease (COPD)** are significant comorbidities that place the patient in this category. *ASA II* - **ASA II** is defined by **mild systemic disease** that does not limit activity. - The patient's conditions such as **angina at rest** and **COPD** are more severe than what would be considered mild. *ASA I* - **ASA I** is reserved for a **normal, healthy patient** with no systemic disease. - This patient has multiple significant systemic diseases, unequivocally ruling out ASA I. *ASA IV* - **ASA IV** describes a patient with **severe systemic disease** that is a constant threat to life. - While critical, the patient's conditions (angina at rest, COPD) are stabilised enough for an **elective procedure** and are not an immediate, constant threat to life.

Preoperative and Postoperative Care Indian Medical PG Question 2: 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

Preoperative and Postoperative Care 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.

Preoperative and Postoperative Care Indian Medical PG Question 3: Pre-operative Nutrition Screening in a patient with morbid obesity planned for Gastric Bypass includes all EXCEPT:

• A. Serum Insulin (Correct Answer)
• B. Serum Vitamin B12
• C. Serum Calcium
• D. Serum Magnesium

Preoperative and Postoperative Care Explanation: ***Serum Insulin*** - While relevant to **diabetes** and metabolic health, routine **pre-operative insulin screening** is not standard for gastric bypass. - Nutritional screening focuses on identifying and correcting deficiencies that could complicate surgery or post-operative recovery. *Serum Vitamin B12* - Patients undergoing **gastric bypass** are at high risk for **Vitamin B12 deficiency** due to altered absorption in the bypassed stomach and small intestine. - Pre-operative screening is essential to identify and replete deficiencies to prevent post-operative neurological complications. *Serum Calcium* - **Malabsorption of calcium** is a known risk after gastric bypass due to changes in the digestive tract. - Pre-operative **calcium levels** are crucial for bone health assessment and to guide supplementation strategies. *Serum Magnesium* - **Magnesium deficiency** can occur post-gastric bypass due to malabsorption. - Pre-operative screening helps to identify existing deficiencies, which can impact cardiac function and neuromuscular health.

Preoperative and Postoperative Care Indian Medical PG Question 4: In anesthesiology, mild systemic disease is classified under which ASA grade?

• A. 2 (Correct Answer)
• B. 4
• C. 3
• D. 1

Preoperative and Postoperative Care Explanation: <b style="font-weight: bold;"><i>2</i></b> - <b style="font-weight: bold;">ASA Grade 2</b> is defined as a patient with <b style="font-weight: bold;">mild systemic disease</b> that is well-controlled and does not limit daily activities. - Examples include a controlled hypertension, controlled type 2 diabetes without systemic complications, or a mild obesity (BMI 30-40). <i>4</i> - <b style="font-weight: bold;">ASA Grade 4</b> indicates a patient with <b style="font-weight: bold;">severe systemic disease</b> that is a constant threat to life. - This includes conditions such as recent myocardial infarction, stroke, or severe valvular disease, which pose significant risks to patient safety during surgery. <i>3</i> - <b style="font-weight: bold;">ASA Grade 3</b> describes a patient with <b style="font-weight: bold;">severe systemic disease</b> that limits activity but is not incapacitating. - Examples include poorly controlled hypertension or diabetes, stable angina, or moderate chronic obstructive pulmonary disease (COPD). <i>1</i> - <b style="font-weight: bold;">ASA Grade 1</b> is assigned to a <b style="font-weight: bold;">healthy patient</b> without any systemic disease. - This classification implies no physiological, physical, or psychological disturbance, other than the condition requiring surgery.

Preoperative and Postoperative Care Indian Medical PG Question 5: Most sensitive method of monitoring cardiovascular ischemia in the perioperative period is -

• A. NIBP
• B. ECG
• C. Pulse oximeter
• D. TEE (Correct Answer)

Preoperative and Postoperative Care Explanation: ***TEE*** - **Transesophageal echocardiography (TEE)** is the most sensitive method for detecting perioperative myocardial ischemia because it can visualize **regional wall motion abnormalities** and changes in **ventricular function** much earlier than ECG. - **Ischemia** directly impairs the contractility of the affected myocardium, leading to subtle changes in wall motion that TEE can identify. *NIBP* - **Non-invasive blood pressure (NIBP)** monitoring can detect **hemodynamic changes** (like hypotension or hypertension) that may precede or accompany ischemia. - However, these changes are **non-specific** and occur relatively late, making NIBP a less sensitive indicator of early ischemia. *ECG* - **Electrocardiography (ECG)** monitors the electrical activity of the heart and can detect **ST-segment changes** indicative of ischemia. - While useful, ECG changes may appear later than wall motion abnormalities, and **silent ischemia** can be missed if the leads are not optimally placed or if the ischemia does not produce significant electrical changes. *Pulse oximeter* - A **pulse oximeter** measures **oxygen saturation** in the peripheral blood. - It is primarily used to assess **respiratory function** and tissue oxygenation, and it does not directly monitor myocardial ischemia or cardiac function.

Preoperative and Postoperative Care Flashcard 1 of 5

Question: _____score is used to assess the risk of operative mortality in a patient undergoing thoracic surgery.

Answer: Thoraco

Preoperative and Postoperative Care Flashcard 2 of 5

Question: Antibiotics should be given within _____ mins before the incision to prevent surgical site infections

Answer: 60

Preoperative and Postoperative Care Flashcard 3 of 5

Question: The Romo Vac drain, depicted in the image, is a _____ type of drain

Answer: closed

Preoperative and Postoperative Care Flashcard 4 of 5

Question: The purpose of incentive spirometry in a post-operative patient is to prevent _____.

Answer: pulmonary atelectasis

Preoperative and Postoperative Care Flashcard 5 of 5

Question: A foley's tube with a _____ coloured ring has size 24FR/CH

Answer: blue