Postoperative Care Practice Questions

Q: A 25-year-old overweight female was given fentanyl-pancuronium anesthesia for surgery. After surgery and extubation, she was observed to have limited movement of the upper body and chest wall in the recovery room. She was conscious and alert, but voluntary respiratory effort was limited. Her blood pressure and heart rate were normal. The likely diagnosis is:

Incomplete reversal of pancuronium. ***Incomplete reversal of pancuronium*** - **Pancuronium** is a **nondepolarizing neuromuscular blocker** that causes muscle paralysis; incomplete reversal would lead to residual weakness and limited movement, especially of the respiratory muscles. - The patient is **conscious and alert** but has limited voluntary respiratory effort and upper body movement, consistent with residual neuromuscular blockade rather than central respiratory depression. *Respiratory depression* - While opioids like fentanyl can cause respiratory depression, the patient being **conscious and alert** makes primary central respiratory depression less likely. - **Fentanyl-induced respiratory depression** would typically involve a decreased respiratory rate and depth, often with an altered mental status, which is not described. *Pulmonary embolism* - A **pulmonary embolism** would typically present with **dyspnea, tachypnea, tachycardia**, and potentially hypoxemia, which are not mentioned in this scenario. - The patient's **normal blood pressure and heart rate** make an acute, significant pulmonary embolism less probable. *Fentanyl-induced chest wall rigidity* - **Fentanyl-induced chest wall rigidity** ("woody chest syndrome") occurs *during* rapid intravenous administration or high doses of opioids, making ventilation difficult. - This typically occurs **intraoperatively** or immediately post-administration, not in the recovery room after extubation when a patient is conscious and attempting voluntary breathing.

Q: "Active core rewarming" refers to

Heated crystalloids. ***Heated crystalloids*** - **Heated crystalloids** administered intravenously contribute to active core rewarming by directly introducing warm fluids into the circulatory system, raising the internal body temperature. - This method is particularly effective for **moderate to severe hypothermia** as it rapidly delivers heat to the body's core. *Heated humidified O2* - Administering **heated and humidified oxygen** helps prevent further heat loss from the respiratory tract and contributes to rewarming. - While beneficial, it is generally considered a less aggressive or primary method of **active core rewarming** compared to direct intravenous fluid administration because it does not directly warm the bloodstream. *Peritoneal dialysis* - **Peritoneal dialysis** involves introducing warm dialysate into the peritoneal cavity, allowing for heat exchange. - This is an invasive procedure primarily used when other rewarming methods are insufficient, and it is a specific type of active core rewarming, but not the only one or most common representation of the term itself. *All of the options* - While **heated humidified O2** and **peritoneal dialysis** are methods of active rewarming, the question asks for what "active core rewarming" refers to. - Each of these options represents a specific technique, and while all contribute to rewarming the core, **heated crystalloids** are a more general and common representation encompassed by the term "active core rewarming."

Q: The following are used for treatment of postoperative nausea and vomiting following squint surgery in children except:-

Ketamine. ***Ketamine*** - **Ketamine** is an anesthetic and analgesic agent that is known to **increase the incidence of postoperative nausea and vomiting (PONV)**, particularly at higher doses, making it unsuitable for preventing PONV. - Its mechanism of action can stimulate the **chemoreceptor trigger zone** and **vestibular system**, contributing to emetogenic effects. *Ondansetron* - **Ondansetron** is a **serotonin 5-HT3 receptor antagonist** and is a first-line drug for the prevention and treatment of PONV in both adults and children. - It effectively blocks serotonin in the gastrointestinal tract and the **medulla oblongata**, reducing nausea and vomiting. *Propofol* - **Propofol** is an intravenous anesthetic that has **antiemetic properties**, making it useful for reducing PONV when used as part of the anesthetic regimen or as a sub-hypnotic bolus. - Its antiemetic effect is thought to be mediated through **dopamine receptor blockade** and action on the **GABAergic system**. *Dexamethasone* - **Dexamethasone** is a **corticosteroid** with significant antiemetic properties, commonly used as an adjunct for PONV prevention. - It is believed to act by inhibiting **prostaglandin synthesis** and reducing inflammation, thereby modulating pathways involved in nausea and vomiting.

Q: Which of the following is the most common postoperative complication related to intubation:

Sore throat. ***Sore throat*** - **Sore throat** is a very common and usually minor complication that occurs after intubation, due to irritation of the pharyngeal mucosa by the endotracheal tube. - The incidence can be as high as 60% and is often considered a **nuisance complication** rather than a serious one. *Abductor Paralysis* - **Abductor paralysis** of the vocal cords is a rare but serious complication, often resulting from injury to the **recurrent laryngeal nerve**. - This can lead to **stridor** and **airway obstruction**, requiring further intervention. *Bleeding* - Significant **bleeding** related to intubation is uncommon but can occur if there is trauma to the pharynx, larynx, or trachea, especially in the presence of **coagulopathy** or difficult intubation. - Minor epistaxis can occur if a **nasal intubation** is performed. *Malposition* - **Malposition** of the endotracheal tube, such as **esophageal intubation** or **mainstem bronchial intubation**, is a critical complication that can lead to severe hypoxemia or lung collapse. - While serious, it is usually recognized and corrected immediately during or shortly after intubation, making it less frequently a *postoperative* symptom compared to sore throat.

Q: Why 100% oxygen has to be given to a patient after recovering from N2O anesthesia?

Diffusion hypoxia. ***Diffusion hypoxia*** - Upon discontinuation of N2O, its rapid diffusion out of the blood into the **alveoli** can dilute the partial pressures of **oxygen** and **carbon dioxide**, leading to hypoxemia and hypercapnia. - Administering 100% oxygen prevents this, ensuring adequate oxygenation while N2O is exhaled. *Second gas effect* - This phenomenon refers to the rapid uptake of a highly soluble anesthetic (like N2O) from the alveoli, which then concentrates the inspired partial pressure of a co-administered less soluble anesthetic, speeding its induction. - This effect is significant during the **induction phase** of anesthesia, not recovery. *Bronchoconstriction* - This is the narrowing of the airways, which can be caused by various factors like allergies, asthma, or irritants, but is not a direct consequence of recovering from N2O anesthesia or a reason for 100% oxygen administration. - While patients with **reactive airway disease** might experience bronchoconstriction under anesthesia, it is not specifically linked to N2O recovery for the general population. *Atelectasis* - This is the collapse of lung tissue, which can occur during or after surgery due to conditions like hypoventilation, airway obstruction, or pressure on the lungs. - Administering 100% oxygen is not used primarily to prevent atelectasis immediately after N2O cessation, although good ventilation and lung recruitment maneuvers are important in preventing it generally.

Q: Which of the following agents is used for the treatment of post operative shivering?

Pethidine. ***Pethidine*** - **Pethidine (meperidine)** is a **synthetic opioid** known for its **mu-receptor agonism** and weak anticholinergic properties, making it effective in treating **post-operative shivering**. - Its mechanism in reducing shivering is thought to involve modulation of the **thermoregulatory center** in the hypothalamus. *Atropine* - **Atropine** is an **anticholinergic drug** that primarily blocks muscarinic acetylcholine receptors, leading to effects like increased heart rate and decreased secretions. - It does not directly act on the thermoregulatory centers or muscle activity responsible for shivering. *Thiopentone* - **Thiopentone** is a **barbiturate** used as an intravenous anesthetic, primarily for induction of anesthesia. - While it has CNS depressant effects, it is not indicated or effective for the specific treatment of post-operative shivering. *Suxamethonium* - **Suxamethonium (succinylcholine)** is a **depolarizing neuromuscular blocker** used to induce muscle paralysis, typically for intubation. - It would prevent shivering by paralyzing skeletal muscles, but this is a dangerous and inappropriate treatment for shivering due to its profound respiratory depressant effects.

Q: Postoperative nausea and vomiting are uncommon with

Propofol. ***Propofol*** - **Propofol** is known for its antiemetic properties, which contributes to a lower incidence of **postoperative nausea and vomiting (PONV)**. - Its mechanism involves modulating **dopaminergic activity** in the chemoreceptor trigger zone and possibly direct effects on serotonin receptors. *Etomidate* - While etomidate is a fast-acting induction agent, it does not inherently possess antiemetic properties. - Its use does not significantly reduce the risk of **PONV** compared to other induction agents, and some studies suggest it may even increase the risk slightly. *Thiopentone* - **Thiopentone**, a barbiturate, is typically associated with a higher incidence of **PONV** compared to propofol. - It does not offer any protective effect against nausea and vomiting and can contribute to these side effects in the postoperative period. *All of the options* - This option is incorrect because **etomidate** and **thiopentone** do not share the **antiemetic properties** of propofol. - Only **propofol** is specifically known to reduce the incidence of **PONV**.

Q: Shivering observed in the early part of the postoperative period is due to

Hypothermia. **Hypothermia** - Shivering is a primary physiological response to **hypothermia**, an attempt by the body to generate **heat** by increasing muscle activity. - Patients often experience a drop in core body temperature during surgery due to factors like cold operating rooms, exposed body cavities, and anesthetic effects. *Pain* - While pain can cause discomfort and muscle tension, it typically does not manifest as generalized **shivering** in the early postoperative period. - Pain is usually managed with analgesics, and shivering is more indicative of a **thermoregulatory disturbance**. *Emergence delirium* - Emergence delirium is characterized by disorientation, agitation, and non-purposeful movements, but not primarily by **shivering**. - This condition is often related to the residual effects of anesthetic agents or anxiety upon waking. *Drug withdrawal* - Drug withdrawal can cause tremors and agitation, but it is less likely to present as **shivering** in the immediate postoperative period in a patient without a known history of substance dependence. - Withdrawal symptoms typically manifest hours to days after the cessation of the drug, depending on its half-life.

Q: A 60-year-old patient undergoing thyroid surgery suddenly develops stridor and hypoxia in the recovery room. What is the most appropriate initial intervention?

Re-intubate the patient. ***Re-intubate the patient*** - The sudden onset of **stridor** and **hypoxia** following thyroid surgery indicates potential **airway obstruction** secondary to laryngeal edema or hematoma, which requires immediate and definitive airway management. - **Re-intubation** provides a secure airway, allowing for controlled ventilation and oxygenation while the underlying cause is investigated and treated. *Administer high-flow oxygen* - While oxygen is crucial for hypoxia, it does not address the underlying **airway obstruction** causing the stridor. - Providing oxygen without establishing a patent airway will not effectively improve oxygenation in cases of significant upper airway compromise. *Perform emergency tracheostomy* - **Emergency tracheostomy** is a more invasive procedure and typically reserved for situations where **oral or nasal intubation** is impossible or contraindicated. - It would not be the immediate first-line intervention, as attempts at less invasive airway management should precede it. *Administer nebulized epinephrine* - Nebulized epinephrine is primarily used for **bronchospasm** or upper airway edema not directly related to surgical trauma, such as in cases of anaphylaxis or croup. - It may temporarily reduce mucosal swelling but does not provide a definitive solution for a potentially rapidly worsening **post-surgical airway obstruction**.

Q: A 45-year-old male with chronic obstructive pulmonary disease (COPD) is undergoing elective surgery. What is the best strategy for postoperative pain management?

Epidural analgesia. ***Epidural analgesia*** - Provides **excellent pain control** while minimizing systemic opioid side effects, which is crucial in patients with **COPD** who may be sensitive to respiratory depression. - Improves **pulmonary function** post-operatively by reducing pain-induced splinting and improving inspiration and coughing ability. *Intravenous morphine* - Can cause **significant respiratory depression**, which is particularly dangerous in patients with compromised respiratory function like those with COPD. - While effective for pain, its systemic effects make it a less ideal choice compared to regional techniques in this population. *Oral NSAIDs* - Provide good analgesia for mild to moderate pain but are generally **insufficient for severe postoperative pain**. - Can be associated with **gastrointestinal side effects** and **renal dysfunction**, and do not address the specific respiratory concerns in COPD. *Transdermal fentanyl* - Primarily used for **chronic pain management** and has a **slow onset of action**, making it unsuitable for acute postoperative pain. - Can also cause **respiratory depression**, similar to intravenous opioids, and its delayed effect makes titration difficult in the immediate postoperative period.

Question 1

A 25-year-old overweight female was given fentanyl-pancuronium anesthesia for surgery. After surgery and extubation, she was observed to have limited movement of the upper body and chest wall in the recovery room. She was conscious and alert, but voluntary respiratory effort was limited. Her blood pressure and heart rate were normal. The likely diagnosis is:

Accepted Answer

Incomplete reversal of pancuronium

Answer

Respiratory depression

Answer

Pulmonary embolism

Answer

Fentanyl-induced chest wall rigidity

Question 2

"Active core rewarming" refers to

Accepted Answer

Heated crystalloids

Answer

Heated humidified O2

Answer

Peritoneal dialysis

Answer

All of the options

Question 3

The following are used for treatment of postoperative nausea and vomiting following squint surgery in children except:-

Accepted Answer

Ketamine

Answer

Ondansetron

Answer

Propofol

Answer

Dexamethasone

Question 4

Which of the following is the most common postoperative complication related to intubation:

Accepted Answer

Sore throat

Answer

Abductor Paralysis

Answer

Bleeding

Answer

Malposition

Question 5

Why 100% oxygen has to be given to a patient after recovering from N2O anesthesia?

Accepted Answer

Diffusion hypoxia

Answer

Second gas effect

Answer

Bronchoconstriction

Answer

Atelectasis

Question 6

Which of the following agents is used for the treatment of post operative shivering?

Accepted Answer

Pethidine

Answer

Atropine

Answer

Thiopentone

Answer

Suxamethonium

Question 7

Postoperative nausea and vomiting are uncommon with

Accepted Answer

Propofol

Answer

Etomidate

Answer

Thiopentone

Answer

All of the options

Question 8

Shivering observed in the early part of the postoperative period is due to

Accepted Answer

Hypothermia

Answer

Pain

Answer

Emergence delirium

Answer

Drug withdrawal

Question 9

A 60-year-old patient undergoing thyroid surgery suddenly develops stridor and hypoxia in the recovery room. What is the most appropriate initial intervention?

Accepted Answer

Re-intubate the patient

Answer

Administer high-flow oxygen

Answer

Perform emergency tracheostomy

Answer

Administer nebulized epinephrine

Question 10

A 45-year-old male with chronic obstructive pulmonary disease (COPD) is undergoing elective surgery. What is the best strategy for postoperative pain management?

Accepted Answer

Epidural analgesia

Answer

Transdermal fentanyl

Answer

Oral NSAIDs

Answer

Intravenous morphine

Postoperative Care — MCQs

Postoperative Care — MCQs

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