Damage Control Resuscitation — MCQs
Which of the following is not a component of damage control surgery?
A patient is in shock with gross comminuted fracture. The first step in management is to give
Initial resuscitation of a trauma patient is best done by administration of which of the following?
What is the correct sequence of management in a patient who presents to the casualty with an RTA? 1. Cervical spine stabilization 2. Intubation 3. IV cannulation 4. CECT
Which one of the following is not a part of the Revised Trauma score -
An induction agent of choice for poor-risk patients with cardiorespiratory disease as well as in situations where preservation of a normal blood pressure is crucial:-
True about Postural Hypotension:
Which of the following is the best treatment for Grade II abdominal hypertension?
Which of the following anesthetic agents may have cerebroprotective effect:
Which intravenous anaesthetic agent has analgesic effect also
Damage Control Resuscitation Indian Medical PG Practice Questions and MCQs
Question 1: Which of the following is not a component of damage control surgery?
- A. Control of contamination
- B. Control of hemorrhage
- C. Definitive repair (Correct Answer)
- D. Temporary closure
Explanation: ***Definitive repair*** - **Damage control surgery** is a staged approach for severely injured patients, prioritizing stabilization over complete repair. - **Definitive repair** is the goal of the final stage, after the patient's physiological status has improved, not an initial component. *Control of contamination* - This is a crucial early step in damage control surgery to prevent **sepsis** and further physiological deterioration. - It involves measures like **bowel repair** or diversion, and thorough abdominal lavage. *Control of hemorrhage* - This is the **primary immediate goal** of damage control surgery, often achieved through packing or temporary shunts. - Uncontrolled bleeding leads to the **lethal triad** of coagulopathy, hypothermia, and acidosis. *Temporary closure* - After addressing immediate life-threatening issues, the abdomen or other body cavity is temporarily closed to prevent **abdominal compartment syndrome**. - This allows time for patient resuscitation and correction of physiological derangements before definitive repair.
Question 2: A patient is in shock with gross comminuted fracture. The first step in management is to give
- A. Blood transfusion
- B. Ringer's Lactate solution intravenously (Correct Answer)
- C. Plasma expanders
- D. Normal saline intravenously
Explanation: ***Ringer's Lactate solution intravenously*** - In cases of **hypovolemic shock**, the immediate priority is to restore circulating volume with an **isotonic crystalloid solution** like **Ringer's Lactate**. - This helps to stabilize hemodynamics and perfuse vital organs, while other measures are prepared. *Blood transfusion* - While blood loss is a concern in gross comminuted fractures, **blood transfusions** are generally reserved for more severe, confirmed blood loss and are often given after initial crystalloid resuscitation. - Type-specific or cross-matched blood may take time to prepare and administer. *Plasma expanders* - **Plasma expanders** (e.g., colloids) are alternatives but are generally not the first-line choice over crystalloids for initial resuscitation in trauma, due to their higher cost and potential side effects, with no clear survival benefit. - They also do not address the acute need for volume replacement as effectively as initial rapid infusion of crystalloids. *Normal saline intravenously* - **Normal saline** is an isotonic crystalloid and could be used; however, **Ringer's Lactate** is often preferred in large volumes for trauma and shock patients because its balanced electrolyte composition closer to plasma may help to prevent **hyperchloremic acidosis**. - While not as detrimental as in very large volumes, normal saline can contribute to metabolic acidosis when given in excessive amounts.
Question 3: Initial resuscitation of a trauma patient is best done by administration of which of the following?
- A. Ringer's lactate solution (Correct Answer)
- B. D5W and 0.45% normal saline
- C. D5W
- D. 5% plasma protein solution
Explanation: ***Ringer's lactate solution*** - **Ringer's lactate** is an **isotonic crystalloid solution** that closely mimics the electrolyte composition of plasma, making it ideal for rapid volume resuscitation in trauma patients. - It helps restore **intravascular volume** effectively and is the preferred initial crystalloid in trauma resuscitation. - The lactate in the solution is metabolized to bicarbonate by the liver, which may help buffer acidosis, though this is not the primary reason for its use in acute trauma. - Modern trauma guidelines (ATLS) recommend crystalloids as the initial resuscitation fluid, with rapid transition to **blood products** in cases of ongoing hemorrhage. *D5W and 0.45% normal saline* - This combination is **hypotonic** relative to plasma and is primarily used for maintenance fluids or replacing free water deficits, not for large-volume resuscitation in trauma. - Administering large amounts in trauma can worsen **cerebral edema** in patients with head injuries or dilute electrolytes dangerously. *D5W* - **D5W (5% dextrose in water)** is essentially free water once the dextrose is metabolized, making it a **hypotonic solution**. - It is not suitable for initial trauma resuscitation as it primarily distributes intracellularly and is ineffective at rapidly expanding **intravascular volume**. - May cause hyperglycemia and worsen outcomes in critically ill patients. *5% plasma protein solution* - **Plasma protein solutions** are colloids, which can expand intravascular volume, but they are more expensive and not recommended for initial resuscitation. - Crystalloids like Ringer's lactate are preferred as the first line of fluid resuscitation due to their ready availability, lower cost, proven safety profile, and efficacy in the initial management of **hypovolemic shock** in trauma. - Current evidence does not show superiority of colloids over crystalloids for trauma resuscitation.
Question 4: What is the correct sequence of management in a patient who presents to the casualty with an RTA? 1. Cervical spine stabilization 2. Intubation 3. IV cannulation 4. CECT
- A. 2,1,4,3
- B. 1,3,2,4
- C. 2,1,3,4
- D. 1,2,3,4 (Correct Answer)
Explanation: ***1,2,3,4*** - This sequence follows the **ATLS (Advanced Trauma Life Support)** protocol, prioritizing immediate life threats in order. - **Cervical spine stabilization** is the **first action upon patient contact** to prevent secondary neurological injury in any trauma patient. - **Airway management (intubation)** is then performed **with maintained in-line c-spine stabilization** - these occur nearly simultaneously but c-spine protection is instituted first. - **IV cannulation (circulation)** follows to establish vascular access for resuscitation and medications. - **CECT (imaging)** is performed last, once the patient is stabilized after addressing immediate life threats. - This follows the **ATLS Primary Survey: Airway (with c-spine protection) → Breathing → Circulation → Disability → Exposure**. *2,1,4,3* - This incorrectly places intubation **before** cervical spine stabilization is initiated. - In ATLS, **c-spine protection must be applied immediately upon patient contact** before any airway manipulation. - Delaying IV cannulation until after CECT is inappropriate as circulatory access is critical for early resuscitation. *1,3,2,4* - While this correctly starts with cervical spine stabilization, it incorrectly places **IV cannulation before intubation**. - In the ATLS primary survey, **Airway comes before Circulation** - securing the airway takes priority over establishing IV access. - This sequence could delay critical airway management in a patient with respiratory compromise. *2,1,3,4* - This sequence places **intubation before cervical spine stabilization**, which violates ATLS principles. - **C-spine stabilization must be the first action** upon approaching any trauma patient to prevent secondary spinal cord injury. - While intubation with in-line stabilization is possible, the c-spine protection must be instituted first, not after beginning airway manipulation.
Question 5: Which one of the following is not a part of the Revised Trauma score -
- A. Systolic blood pressure
- B. Glasgow coma scale
- C. Respiratory rate
- D. Pulse rate (Correct Answer)
Explanation: ***Pulse rate*** - The **Revised Trauma Score (RTS)** uses three physiological parameters: **Glasgow Coma Scale (GCS)**, **Systolic Blood Pressure (SBP)**, and **Respiratory Rate (RR)**. - **Pulse rate** is not a component of the calculated RTS, although it is an important vital sign in trauma assessment. *Systolic blood pressure* - **Systolic blood pressure** is a crucial component of the RTS, reflecting the patient's hemodynamic stability. - It is assigned a coded value (0-4) based on its measurement, with lower values indicating poorer prognosis. *Glasgow coma scale* - The **Glasgow Coma Scale (GCS)** assesses the patient's level of consciousness and neurological status. - It is a key element of the RTS, providing insight into the severity of head injury or overall neurological compromise. *Respiratory rate* - **Respiratory rate** is included in the RTS for its ability to reflect the adequacy of ventilation and overall physiological distress. - Abnormal respiratory rates (too high or too low) are assigned lower coded values, indicating more severe injury.
Question 6: An induction agent of choice for poor-risk patients with cardiorespiratory disease as well as in situations where preservation of a normal blood pressure is crucial:-
- A. Ketamine
- B. Etomidate (Correct Answer)
- C. Propofol
- D. Thiopentone
Explanation: ***Etomidate*** - Etomidate is preferred in patients with **cardiac disease** or **hemodynamic instability** due to its minimal effects on cardiovascular function. - It maintains **cardiovascular stability**, including myocardial contractility and blood pressure, making it ideal for procedures where maintaining a normal blood pressure is crucial. *Ketamine* - Ketamine often causes a **sympathetic stimulating effect**, leading to increases in heart rate and blood pressure, which may be detrimental in such patients. - It is associated with **tachycardia** and **hypertension**, undesirable in a poor-risk patient with cardiorespiratory disease. *Propofol* - Propofol is a potent **vasodilator** and myocardial depressant, which can lead to significant **hypotension**, especially in volume-depleted or critically ill patients. - Its use can result in a dose-dependent decrease in **arterial blood pressure** and **cardiac output**. *Thiopentone* - Thiopentone can cause **myocardial depression** and significant **hypotension**, especially in patients with compromised cardiovascular function. - It leads to a notable decrease in **vascular tone** and venous return, thus lowering blood pressure.
Question 7: True about Postural Hypotension:
- A. Decreases in systolic blood pressure 20 mmHg within 6 minutes.
- B. Decreases in diastolic blood pressure 20 mmHg within 6 minutes.
- C. Decreases in diastolic blood pressure 20 mmHg within 3 minutes.
- D. Decreases in systolic blood pressure 20 mmHg within 3 minutes. (Correct Answer)
Explanation: ***Decreases in systolic blood pressure 20 mmHg within 3 minutes.*** - **Postural hypotension** (or orthostatic hypotension) is defined as a fall in **systolic blood pressure** of at least **20 mmHg** OR a fall in **diastolic blood pressure** of at least **10 mmHg** upon standing. - This drop in blood pressure must occur within **3 minutes** of assuming an upright position from a supine or seated position. - This is the standard diagnostic criterion per American Autonomic Society and European Society of Cardiology guidelines. *Decreases in systolic blood pressure 20 mmHg within 6 minutes.* - While a drop of 20 mmHg in systolic blood pressure is the correct magnitude, the timeframe of **6 minutes** exceeds the standard diagnostic criterion of **3 minutes**. - A delayed drop might indicate other cardiovascular issues or a less pronounced form of orthostatic intolerance, but does not meet the classic definition of postural hypotension. *Decreases in diastolic blood pressure 20 mmHg within 6 minutes.* - This option is incorrect on two counts: the diastolic criterion is **10 mmHg** (not 20 mmHg), and the timeframe is **6 minutes** (not 3 minutes). - While a 20 mmHg drop in diastolic pressure would certainly be significant, it is not the standard diagnostic criterion. *Decreases in diastolic blood pressure 20 mmHg within 3 minutes.* - While the timeframe of **3 minutes** is correct, the diastolic criterion for postural hypotension is a drop of **10 mmHg**, not 20 mmHg. - A 20 mmHg drop in diastolic blood pressure would be a more severe finding, but the standard definition uses 10 mmHg as the threshold.
Question 8: Which of the following is the best treatment for Grade II abdominal hypertension?
- A. Immediate decompression
- B. Normovolemic resuscitation
- C. Laparotomy
- D. Restrictive fluid resuscitation (Correct Answer)
Explanation: ***Restrictive fluid resuscitation*** - **Grade II abdominal hypertension** is defined by an intra-abdominal pressure (IAP) between **16-20 mmHg**. At this stage, conservative measures are prioritized over invasive procedures. - **Restrictive fluid resuscitation** involves carefully managing fluid intake to minimize edema and prevent further increases in intra-abdominal pressure (IAP), which can exacerbate symptoms. This is a key non-operative intervention for managing intra-abdominal hypertension. *Immediate decompression* - **Immediate decompression** (e.g., through decompressive laparotomy) is typically reserved for **Grade III or IV abdominal hypertension** or when there is evidence of organ dysfunction due to the elevated pressure. - Decompression is an invasive procedure with associated risks and is not indicated as a first-line treatment for Grade II hypertension where less invasive medical management can be effective. *Normovolemic resuscitation* - **Normovolemic resuscitation** aims to maintain a normal blood volume. While important in trauma, it does not specifically address the underlying issue of increasing IAP in **abdominal hypertension**. - Excessive fluid administration, even to maintain normovolemia, can contribute to interstitial edema and worsen intra-abdominal pressure. *Laparotomy* - **Laparotomy** (surgical opening of the abdomen) is considered a last resort for **abdominal compartment syndrome (ACS)**, which is the most severe form, or when non-operative measures have failed. - For **Grade II abdominal hypertension**, a less invasive approach is preferred. Surgical intervention carries significant risks and is not typically indicated at this stage.
Question 9: Which of the following anesthetic agents may have cerebroprotective effect:
- A. Ketamine
- B. Etomidate
- C. Barbiturates
- D. All show cerebroprotective effect (Correct Answer)
Explanation: ***All show cerebroprotective effect*** - **Barbiturates**, such as **thiopental**, are known for their profound **cerebroprotective effects** by significantly reducing **cerebral metabolic rate** and **intracranial pressure (ICP)**, particularly beneficial during neurological insults. - **Ketamine** can maintain **cerebral blood flow (CBF)** and **metabolic activity**, potentially offering protection against **ischemic damage** in certain contexts. - **Etomidate** is a short-acting hypnotic agent that can effectively lower **cerebral metabolic rate for oxygen (CMRO2)** and ICP, making it useful for neurosurgical procedures. *Ketamine* - While it can be considered **cerebroprotective** in some situations, particularly by maintaining **cerebral blood flow** and thus oxygen delivery, it is typically associated with increased **cerebral blood flow** and **intracranial pressure** which can be detrimental in cases of head injury or space-occupying lesions. - Its effects on **cerebral metabolism** are complex; while it can decrease overall **metabolic demand**, it can paradoxically increase CMRO2 in certain brain regions. *Etomidate* - **Etomidate** is excellent at reducing **cerebral metabolic rate** and **intracranial pressure**, thus offering protection against **ischemic damage**. - Its **cerebroprotective** properties are primarily linked to its ability to decrease global brain metabolic activity without significantly changing **cerebral blood flow**. *Barbiturates* - **Barbiturates** induce a **dose-dependent reduction** in **cerebral metabolic rate of oxygen (CMRO2)** and **cerebral blood flow (CBF)**, leading to a significant decrease in **intracranial pressure (ICP)**. - This property makes them highly valuable for **cerebroprotection** in conditions like **traumatic brain injury** or **ischemic stroke**.
Question 10: Which intravenous anaesthetic agent has analgesic effect also
- A. Thiopentone
- B. Ketamine (Correct Answer)
- C. Propofol
- D. Etomidate
Explanation: ***Ketamine*** - Ketamine acts as an **N-methyl-D-aspartate (NMDA) receptor antagonist**, providing significant **analgesia** in addition to its anaesthetic effects. - It induces a state of **dissociative anaesthesia**, where the patient appears awake but is unresponsive to pain, making it unique among intravenous anaesthetics. *Thiopentone* - Thiopentone is a **barbiturate** that acts as a potent hypnotic and anaesthetic but provides no significant analgesic properties. - It can even cause **anti-analgesia** (hyperalgesia) at sub-hypnotic doses, increasing sensitivity to pain. *Propofol* - Propofol is a potent intravenous anaesthetic that works primarily as a **GABA-A receptor agonist**, but it lacks intrinsic analgesic properties. - While it can cause some sedation and reduced pain perception due to CNS depression, it does not directly modulate pain pathways in the way an analgesic would. *Etomidate* - Etomidate is a hypnotic agent highly valued for its **cardiovascular stability**, making it suitable for patients with compromised cardiac function. - Like propofol and thiopentone, etomidate primarily acts on **GABA-A receptors** to induce unconsciousness and offers no significant analgesic effects.
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