Anesthesia for Non-Operating Room Procedures Indian Medical PG Practice Questions and MCQs
Question 11: What does NORA stand for in anesthesia?
- A. No oral airway
- B. Non-operative room anesthesia (Correct Answer)
- C. No radiation risk associated
- D. None of the above
Explanation: **Explanation:**
**NORA** stands for **Non-Operating Room Anesthesia**. It refers to the administration of anesthesia or deep sedation in locations outside the traditional operating theater suite. As medical technology advances, more diagnostic and therapeutic procedures are performed in remote locations, making NORA one of the fastest-growing areas in modern anesthesia practice.
* **Why Option B is Correct:** The term specifically describes the setting. Common NORA locations include the Radiology suite (MRI, CT), Cardiac Catheterization labs, Endoscopy suites, Interventional Radiology (IR), and Electroconvulsive Therapy (ECT) clinics.
* **Why Options A, C, and D are Incorrect:**
* **Option A:** "No oral airway" is clinically irrelevant as a definition; airway management in NORA follows the same standards as the OR.
* **Option C:** This is factually incorrect; many NORA locations (like Fluoroscopy or CT suites) involve significant radiation exposure, requiring anesthesiologists to wear lead protection.
**Clinical Pearls for NEET-PG:**
1. **The "Remote Location" Challenge:** NORA is often considered higher risk due to the "isolated" nature of the site, unfamiliar equipment, and limited space/assistance.
2. **Monitoring Standards:** The ASA (American Society of Anesthesiologists) standards for monitoring are the **same** for NORA as they are for the OR (Pulse oximetry, ECG, BP, and Capnography).
3. **MRI Safety:** In the MRI suite, all equipment (gas machines, monitors, laryngoscopes) must be **non-ferromagnetic** to prevent the "projectile effect."
4. **Common Procedures:** Gastroscopy/Colonoscopy (Endoscopy) and ERCP are the most frequent procedures requiring NORA.
Question 12: A 60-year-old male with a history of atrial fibrillation is undergoing colonoscopy under conscious sedation. Which medication is the most appropriate for sedation in this patient?
- A. Ketamine
- B. Etomidate
- C. Midazolam
- D. Propofol (Correct Answer)
Explanation: ***Propofol***
- Propofol offers a **rapid onset** and **short duration of action**, allowing for quick recovery and discharge post-procedure.
- It provides effective sedation, anxiolysis, and amnesia, making it suitable for procedures like colonoscopies, even in patients with a history of **atrial fibrillation**, due to its minimal cardiovascular effects on heart rhythm.
*Midazolam*
- Midazolam has a **longer half-life** and duration of action compared to propofol, which can delay recovery and discharge.
- While effective for sedation, it may cause **respiratory depression** and its effects are less easily titratable than propofol.
*Ketamine*
- Ketamine provides dissociative anesthesia and **potent analgesia**, but it can cause **tachycardia**, **hypertension**, and **emergence reactions** (hallucinations, delirium).
- Its cardiovascular effects and psychomimetic side effects make it less ideal for routine conscious sedation for colonoscopy, especially in a cardiac patient.
*Etomidate*
- Etomidate is primarily used for **induction of anesthesia** due to its rapid onset and minimal hemodynamic impact.
- However, it provides **no analgesia** and can cause **adrenocortical suppression** with prolonged or repeated use, making it less suitable for conscious sedation.
Question 13: Catheter ablation for supraventricular tachycardia (SVT) is most commonly performed under which type of anesthesia?
- A. Local anaesthesia (Correct Answer)
- B. Spinal anaesthesia
- C. No anaesthesia required
- D. General anaesthesia
Explanation: ***Local anaesthesia***
- Catheter ablation for SVT is most commonly performed with **local anaesthesia** at the access site (e.g., groin for femoral vein access) and **conscious sedation**.
- This approach allows the patient to remain awake and cooperative, which is crucial for monitoring symptoms and for performing maneuvers that help identify the arrhythmogenic focus.
*General anaesthesia*
- While general anaesthesia can be used, it is **less common** for routine SVT ablation due to potential effects on electrophysiological properties and patient cooperation.
- It may be considered for pediatric patients, highly anxious patients, or complex cases requiring precise immobility.
*Spinal anaesthesia*
- **Spinal anaesthesia** is a regional technique that numbs the lower body and is typically used for surgical procedures below the waist, such as orthopedic or obstetric surgeries.
- It is **not suitable** for catheter ablation of the heart, which is a procedure involving vascular access and manipulations within the chest cavity.
*No anaesthesia required*
- Catheter ablation is an **invasive procedure** involving the insertion of catheters into blood vessels and their advancement into the heart.
- Performing this procedure without any form of anaesthesia would cause **significant pain and discomfort** to the patient and is not clinically acceptable.
