WorksheetsObstetrics Anesthesia MCQs
Total questions: 20
Worksheet time: 10mins
Which physiological change in pregnancy most significantly affects the minimum alveolar concentration (MAC) of volatile anesthetics?
Increased cardiac output
Decreased functional residual capacity
Increased progesterone levels
Decreased plasma protein binding
What is the most common neuraxial technique used for labor analgesia in advanced labor due to its rapid onset?
Epidural analgesia
Combined spinal-epidural (CSE) analgesia
Spinal analgesia
Dural puncture epidural
A 28-year-old woman in labor receives an epidural with 10 ml of 0.5% bupivacaine with epinephrine 1:200,000. Fifteen minutes later, her blood pressure is 70/50 mmHg, and fetal heart rate is 90 bpm with loss of variability. What is the most likely cause?
Local anesthetic systemic toxicity
Hypotension from sympathetic blockade
Amniotic fluid embolism
Uterine hyperstimulation
Which medication is commonly administered preoperatively to reduce the risk of aspiration in pregnant patients undergoing general anesthesia?
Ranitidine
Bicitra (sodium citrate)
Metoclopramide
Ondansetron
Why is fetal exposure to chloroprocaine lower than to bupivacaine following maternal epidural injection?
Chloroprocaine has a shorter half-life
Chloroprocaine is metabolized by plasma cholinesterase
Bupivacaine has higher lipid solubility
Chloroprocaine is less protein-bound
A 30-year-old woman undergoes cesarean delivery under spinal anesthesia with tetracaine. Twelve hours later, she develops bilateral loss of pain and temperature sensation below T8 and leg paralysis. What is the most likely cause?
Epidural hematoma
Anterior spinal artery syndrome
Cauda equina syndrome
Transient neurologic symptoms
Which of the following is the LEAST likely clinical finding in a parturient with amniotic fluid embolism?
Hypotension
Hypoxemia
Coagulopathy
Hypertension
What is the most appropriate anesthetic technique for a woman in the second stage of labor requiring analgesia for vaginal delivery?
General anesthesia
Pudendal nerve block
Epidural analgesia
Intravenous opioids
Which of the following best explains the more rapid rise of alveolar concentration of volatile anesthetics in pregnant women?
Increased tidal volume
Decreased functional residual capacity
Increased cardiac output
Decreased minute ventilation
A parturient receives magnesium sulfate for preeclampsia. Which anesthetic drug's dose requirement is LEAST affected by magnesium sulfate?
Vecuronium
Rocuronium
Succinylcholine
Atracurium
What is the most appropriate initial action for a newborn with thick meconium, flaccid, apneic, bradycardic, and cyanotic at cesarean delivery?
Immediate endotracheal intubation and suctioning
Administer naloxone
Start chest compressions
Provide positive pressure ventilation
A 26-year-old woman develops headache, nausea, and photophobia 36 hours after cesarean delivery with subarachnoid block. Her temperature is 38.8°C, and leukocyte count is 14,200/mm³. What is the next step?
Administer antibiotics
Perform a lumbar puncture
Administer a blood patch
Order a CT scan
Which spinal cord segments transmit pain from uterine contractions and cervical dilatation during the first stage of labor?
T6-T8
T10-L1
L2-L4
S2-S4
Which of the following reduces the risk of post-dural puncture headache (PDPH) during epidural placement?
Using a larger gauge needle
Orienting the needle perpendicular to meningeal fibers
Using a rounded point needle
Placing the patient in a lateral position
A parturient receives 1000 ml of 5% dextrose in lactated Ringer's solution before delivery, resulting in a blood glucose of 580 mg/dl. What is the most likely neonatal risk?
Intraventricular hemorrhage
Neonatal hypoglycemia
Respiratory distress syndrome
Hyperbilirubinemia
Which technique is most appropriate for anesthesia during removal of a retained placenta after delivery with a pudendal block?
General anesthesia
Spinal anesthesia
Epidural top-up
Intravenous sedation
Why does succinylcholine 1 mg/kg rarely cause fetal neuromuscular blockade in pregnant women?
Low placental transfer
Rapid maternal metabolism
High fetal cholinesterase activity
Low fetal sensitivity to succinylcholine
Which of the following is NOT a recognized side effect of magnesium sulfate in preeclampsia that concerns anesthesiologists?
Potentiation of neuromuscular blockers
Respiratory depression
Hypotension
Increased MAC of volatile anesthetics
A woman at 40 weeks' gestation with a breech presentation requires uterine relaxation for vaginal delivery. Which agent is most effective?
Nitroglycerin
Magnesium sulfate
Terbutaline
Oxytocin
What is the recommended dose of anti-D immunoglobulin for a rhesus-negative woman undergoing amniocentesis at 16 weeks?
250 IU
500 IU
1000 IU
1500 IU
