Which of the following is the correct sequence of general anaesthesia?

Appeared in: DSSSB October 2024

Explanation

The correct sequence of general anaesthesia, as described by Guedel's classification, is a progression through four distinct stages.
It begins with Stage I (Analgesia), where the patient loses pain sensation but is still conscious.
This is followed by Stage II (Delirium or Excitement), which starts with the loss of consciousness and can involve involuntary movements.
Next is Stage III (Surgical Anesthesia), the desired level for operations, characterized by unconsciousness, muscle relaxation, and regular breathing.
The final stage, Stage IV (Medullary Paralysis), is a dangerous overdose state marked by the shutdown of vital brainstem functions, leading to respiratory and circulatory failure.

Option A: This sequence is incorrect. It starts with Medullary paralysis, which is the final and most dangerous stage (overdose), not the beginning.
Option C: This sequence is incomplete and incorrectly ordered. It omits the first two essential stages (Analgesia and Delirium) and starts with Surgical anaesthesia.
Option D: This sequence is incorrect because it omits the first stage (Analgesia) and starts with the Stage of delirium.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Stages of General Anesthesia (Guedel's Classification) as background academic context rather than a clinical decision trigger.
Nurses must be able to recognize the signs of each stage of anaesthesia to anticipate patient needs and potential complications.
During Stage II (Excitement), it is critical to maintain a quiet environment and assist the anaesthesiologist, as patients are prone to laryngospasm, vomiting, and injury from uncontrolled movements.
Continuous monitoring of vital signs (respiration, heart rate, blood pressure) is paramount to ensure the patient remains safely in Stage III and to prevent progression into the life-threatening Stage IV.

How to Approach the Question

First, identify the core of the question, which asks for the 'correct sequence' of 'general anaesthesia'.
Recall the formal classification of anaesthesia stages, known as Guedel's classification.
Mentally list the four stages in order: 1. Analgesia, 2. Delirium/Excitement, 3. Surgical Anesthesia, 4. Medullary Paralysis.
Compare this correct sequence with the given options.
Eliminate options that start with the wrong stage or have an incorrect order.
Select the option that perfectly matches the established progression of anaesthesia stages.

Concept Tested & Keywords

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E6 Pharmacology KD Tripathi Essentials 9e Part 2 p. 48-50

E6 Nursing Brunner Adult Health 3SA Vol 1 Part 1 p. 98-100

Practise the full DSSSB October 2024

Attempt every question from this paper in a timed mock, then review the full solution for each one.