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100+ Free CMSA Diploma in Anaesthesia DA(SA) Practice Questions

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Key Facts: CMSA Diploma in Anaesthesia DA(SA) Exam

3 written papers

Written Component

CMSA DA(SA) Regulations

AoC + oral/OSCE

Clinical Component

CMSA DA(SA) Regulations

R16 800

Examination Fee

CMSA Fee Schedule

Cohen 65

Standard Setting

CMSA Senate Policy

CMSA

Exam Body

College of Anaesthetists of SA

The DA(SA) validates essential clinical anaesthesia knowledge and crisis management skills for doctors practicing in South Africa, covering pharmacological principles, airway anatomy, monitoring, and resuscitation protocols.

Sample CMSA Diploma in Anaesthesia DA(SA) Practice Questions

Try these sample questions to test your CMSA Diploma in Anaesthesia DA(SA) exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Which factor is known to increase the Minimum Alveolar Concentration (MAC) of a volatile anaesthetic agent?
A.Acute alcohol intoxication
B.Pregnancy
C.Hyperthermia
D.Advanced age
Explanation: Hyperthermia increases central metabolic rate and neuronal activity, thereby increasing MAC requirements by approximately 5% for every degree Celsius rise above normal body temperature. Hypernatremia and sympathomimetic states also increase MAC.
2Which inhalational agent has the lowest blood-gas partition coefficient, resulting in the most rapid speed of induction and recovery?
A.Desflurane
B.Halothane
C.Sevoflurane
D.Isoflurane
Explanation: Desflurane has a blood-gas partition coefficient of 0.42, which is lower than sevoflurane (0.65), isoflurane (1.4), and halothane (2.54). A lower blood-gas solubility coefficient means less drug is dissolved in blood, allowing alveolar partial pressure (FA) to rapidly approach inspired partial pressure (FI), leading to rapid onset and offset.
3A 35-year-old patient receives propofol for induction of anaesthesia. What primary mechanism accounts for the rapid termination of its central hypnotic effect following a single bolus dose?
A.Extensive hepatic metabolism by cytochrome P450 enzymes
B.Rapid redistribution from brain tissue to less vascular muscle and fat tissues
C.Renal excretion of unchanged active propofol drug molecules
D.Extrahepatic pulmonary breakdown by plasma esterases
Explanation: After a single intravenous bolus, propofol rapidly equilibrates across the blood-brain barrier due to high lipophilicity. Awakening within 5 to 10 minutes occurs primarily because of rapid redistribution of propofol from the highly perfused vessel-rich group (brain, heart) into the vessel-intermediate group (skeletal muscle, fat), reducing brain tissue concentration below the hypnotic threshold.
4Etomidate is frequently selected for induction in hemodynamically unstable patients. Which enzyme inhibition is responsible for its classic endocrine side effect?
A.11-beta-hydroxylase
B.5-alpha-reductase
C.21-hydroxylase
D.Aromatase
Explanation: Etomidate causes dose-dependent adrenocortical suppression by reversibly inhibiting 11-beta-hydroxylase, the enzyme that converts 11-deoxycortisol to cortisol and 11-deoxycorticosterone to aldosterone in the adrenal cortex. A single induction dose can suppress cortisol response to ACTH for up to 24 hours.
5Ketamine produces a state of 'dissociative anaesthesia'. What is its primary central molecular mechanism of action?
A.Potentiation of gamma-aminobutyric acid type A (GABAA) receptors
B.Agonism at central alpha-2 adrenergic receptors
C.Non-competitive antagonism of N-methyl-D-aspartate (NMDA) receptors
D.Competitive inhibition of voltage-gated sodium channels
Explanation: Ketamine produces dissociative anaesthesia and analgesia primarily by non-competitively binding to the phencyclidine site inside the open channel of N-methyl-D-aspartate (NMDA) ionotropic glutamate receptors in the brain and spinal cord, inhibiting excitatory glutamatergic transmission.
6Which neuromuscular blocking agent undergoes organ-independent clearance via spontaneous chemical degradation (Hofmann elimination) at physiological pH and temperature?
A.Pancuronium
B.Rocuronium
C.Vecuronium
D.Cisatracurium
Explanation: Cisatracurium (an isomer of atracurium) undergoes non-enzymatic Hofmann elimination (pH- and temperature-dependent retro-Michael addition) in plasma and tissues. It produces minimal histamine release and is the muscle relaxant of choice in patients with severe renal or hepatic impairment.
7Sugammadex rapidly reverses neuromuscular blockade induced by rocuronium. What is its mechanism of action?
A.Reversible inhibition of acetylcholinesterase at the neuromuscular junction
B.Allosteric activation of presynaptic choline acetyltransferase enzymes
C.Direct encapsulation of aminosteroid neuromuscular blocking molecules in plasma
D.Competitive displacement of rocuronium from post-junctional nicotinic receptors
Explanation: Sugammadex is a modified gamma-cyclodextrin molecule structured with a lipophilic core and hydrophilic exterior. It selectively encapsulates aminosteroid relaxants (rocuronium > vecuronium) in plasma in a 1:1 ratio, rapidly lowering free intravascular concentrations and creating a concentration gradient that draws drug off the neuromuscular junction.
8Which opioid agonist has an ultrashort duration of action owing to rapid hydrolysis by non-specific plasma and tissue esterases?
A.Alfentanil
B.Fentanyl
C.Sufentanil
D.Remifentanil
Explanation: Remifentanil contains an ester linkage susceptible to rapid degradation by non-specific plasma and tissue esterases. Its context-sensitive half-time remains constant at approximately 3-5 minutes regardless of infusion duration, allowing precise titratability and rapid recovery.
9Which shift in the oxyhemoglobin dissociation curve indicates a DECREASED affinity of hemoglobin for oxygen (facilitating O2 unloading at tissues)?
A.Leftward shift caused by hypothermia, alkalosis, or decreased 2,3-DPG
B.Rightward shift caused by increased PCO2, increased temperature, or decreased pH (Bohr effect)
C.Rightward shift caused by carboxyhemoglobin formation
D.Leftward shift caused by fetal hemoglobin (HbF) predominance
Explanation: A rightward shift of the oxyhemoglobin dissociation curve signifies reduced hemoglobin-oxygen affinity and an increased P50 value. This is driven by elevated PCO2, raised temperature, increased hydrogen ion concentration (acidosis/low pH - Bohr effect), and elevated red cell 2,3-DPG levels.
10A 68-year-old male with chronic renal failure (eGFR 18 mL/min/1.73m²) receives repeated boluses of morphine postoperatively. He becomes excessively somnolent with a respiratory rate of 6 breaths/min. Which metabolite accumulation is responsible?
A.Normorphine
B.Morphine-3-glucuronide (M3G)
C.Morphine-6-glucuronide (M6G)
D.Codeine-6-glucuronide
Explanation: Morphine is metabolized in the liver to morphine-3-glucuronide (M3G, 60%) and morphine-6-glucuronide (M6G, 10%). M6G is a potent mu-opioid receptor agonist with greater analgesic and sedative potency than parent morphine. Both metabolites are excreted by the kidney; in renal failure, M6G accumulates significantly, causing profound sedation and life-threatening respiratory depression.

About the CMSA Diploma in Anaesthesia DA(SA) Exam

The Diploma in Anaesthesia DA(SA) is the premier diploma credential for non-specialist medical practitioners delivering anaesthetic care in South African public and private healthcare facilities. It assesses core clinical competence in perioperative care, airway management, regional block techniques, physiological monitoring, and crisis resuscitation.

Assessment

Three 3-hour written papers (Paper 1 short-answer questions 33%, Paper 2 short-answer questions 33%, Paper 3 of 120 single best answer MCQs 34%) with an Assessment of Competence and an oral/OSCE. Blueprint domains: Physiology & Pharmacology of Anaesthesia (30%), Applied Anatomy & Airway Management (20%), Clinical Anaesthesia & Monitoring (30%), and Anaesthetic Complications, Emergencies & Resuscitation (20%).

Time Limit

3 hours per written paper (three papers); oral/OSCE scheduled separately

Passing Score

Overall average of at least 50% (with written subminimum) plus a pass in the oral/OSCE; Cohen 65 standard setting.

Exam Fee

R16 800 (College of Anaesthetists of South Africa (Colleges of Medicine of South Africa))

CMSA Diploma in Anaesthesia DA(SA) Exam Content Outline

30%

Physiology & Pharmacology of Anaesthesia

Cardiovascular, respiratory, neuromuscular, and central nervous system physiology; pharmacokinetics and pharmacodynamics of intravenous and inhalational induction agents, local anaesthetics, muscle relaxants, analgesics, and autonomic drugs.

20%

Applied Anatomy & Airway Management

Functional airway anatomy, upper and lower respiratory tract anatomy, neuroanatomy relevant to neuraxial and peripheral nerve blocks, difficult airway algorithms, supraglottic devices, and endotracheal intubation techniques.

30%

Clinical Anaesthesia & Monitoring

Preoperative assessment and optimization, intraoperative management across general, paediatric, and obstetric surgery, physiological monitoring (ECG, pulse oximetry, capnography, invasive lines), fluid therapy, and blood transfusion protocols.

20%

Anaesthetic Complications, Emergencies & Resuscitation

Management of acute anaesthetic crises including cannot intubate cannot oxygenate (CICO), malignant hyperthermia, local anaesthetic systemic toxicity (LAST), severe anaphylaxis, bronchospasm, massive hemorrhage, and ALS resuscitation.

How to Pass the CMSA Diploma in Anaesthesia DA(SA) Exam

What You Need to Know

  • Passing score: Overall average of at least 50% (with written subminimum) plus a pass in the oral/OSCE; Cohen 65 standard setting.
  • Assessment: Three 3-hour written papers (Paper 1 short-answer questions 33%, Paper 2 short-answer questions 33%, Paper 3 of 120 single best answer MCQs 34%) with an Assessment of Competence and an oral/OSCE. Blueprint domains: Physiology & Pharmacology of Anaesthesia (30%), Applied Anatomy & Airway Management (20%), Clinical Anaesthesia & Monitoring (30%), and Anaesthetic Complications, Emergencies & Resuscitation (20%).
  • Time limit: 3 hours per written paper (three papers); oral/OSCE scheduled separately
  • Exam fee: R16 800

Keys to Passing

  • Work through all 100 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

CMSA Diploma in Anaesthesia DA(SA) Study Tips from Top Performers

1Master uptake and distribution of inhalational agents, blood-gas partition coefficients, and MAC modifiers.
2Thoroughly review difficult airway algorithms (such as the Difficult Airway Society / SASA guidelines) including surgical airway access.
3Understand emergency protocols inside-out: Lipid emulsion dosing for LAST, Dantrolene for Malignant Hyperthermia, and adrenaline administration in anaphylaxis.

Frequently Asked Questions

What is the format of the CMSA DA(SA) examination?

The DA(SA) has three 3-hour written papers (two short-answer papers and one paper of 120 single best answer MCQs) plus an Assessment of Competence and an oral/OSCE. This free bank provides 100 practice MCQs as a study aid for the SBA paper.

Who is eligible to take the DA(SA) examination in South Africa?

Medical practitioners registered with the HPCSA who have completed internship and community service, and who have completed at least 6 months of supervised full-time training in clinical anaesthesia in an accredited hospital.

How is the DA(SA) content distributed across clinical domains?

The blueprint domains are weighted as follows: Physiology & Pharmacology (30%), Applied Anatomy & Airway Management (20%), Clinical Anaesthesia & Monitoring (30%), and Anaesthetic Complications, Emergencies & Resuscitation (20%). This bank's 100 practice MCQs follow the same weighting.