Trauma Practice Questions

Q: Which of the following is a contraindication to nonoperative management of splenic injury?

Hemodynamic instability. ***Hemodynamic instability*** - **Hemodynamic instability** in a patient with splenic injury indicates ongoing hemorrhage, which requires immediate surgical intervention to control bleeding and prevent hypovolemic shock. - This is a critical contraindication to non-operative management, as delaying surgery significantly increases morbidity and mortality. *History of hematologic disorder* - While certain **hematologic disorders** like coagulopathies can increase the risk of bleeding after splenic injury, they are not an absolute contraindication to non-operative management if the patient is hemodynamically stable and bleeding is contained. - Close monitoring and correction of coagulopathy might be necessary, but it does not automatically preclude conservative treatment. *HIV infection* - **HIV infection** itself is not a contraindication to non-operative management of splenic injury. The decision for operative versus non-operative management is based on the patient's hemodynamic status and the grade of splenic injury, not their HIV status. - While immune compromise can affect recovery, it does not directly impact the initial management decision for splenic trauma. *Presence of multiple solid-organ injuries* - The presence of **multiple solid-organ injuries** does not automatically contraindicate non-operative management for the splenic injury itself, provided the patient remains hemodynamically stable. - Each organ injury is assessed individually, and the decision for surgery is usually driven by ongoing hemorrhage or other complications from one or more of the injured organs that cannot be managed conservatively.

Q: A 50-year-old female with a 50 kg body weight suffered burns after a pressure cooker blast, involving 45% of her total body surface area. How much fluid should be given in the first 8 hours?

4.5 litres. ***4.5 litres*** - The **Parkland formula** for fluid resuscitation in burn patients is **4 mL x body weight (kg) x % TBSA burned**. - For this patient: 4 mL x 50 kg x 45% = 9000 mL. Half of this volume (4500 mL or **4.5 litres**) is given in the first **8 hours**. *4 litres* - This volume would be insufficient for a patient with a 45% TBSA burn and 50 kg body weight according to the **Parkland formula**. - Undersupplying fluid in severe burns can lead to **hypovolemic shock** and organ dysfunction. *5 litres* - This volume is slightly more than the calculated amount for the first 8 hours based on the **Parkland formula**. - Over-resuscitation can lead to complications such as **pulmonary edema** and **abdominal compartment syndrome**. *6 litres* - This volume is significantly higher than the recommended amount for the first 8 hours, indicating **over-resuscitation**. - Excessive fluid administration can worsen burn edema, leading to **compartment syndromes** and potentially impacting organ function negatively.

Q: Which of the following statements about maxillary fractures is false?

Pediatric maxillary fracture is more comminuted. **Pediatric maxillary fracture is more comminuted** - Pediatric bones, including the maxilla, are generally more *elastic* and less brittle than adult bones, leading to *greenstick fractures* or less comminution, rather than more. - The presence of *developing tooth buds* also influences fracture patterns, making them less prone to extensive fragmentation. *Geriatric maxillary fracture is difficult to treat* - *Osteoporosis* and reduced bone density in geriatric patients can make plate fixation challenging due to poor screw purchase. - Slower healing rates and increased comorbidities in older patients can complicate surgical management and recovery. *Midpalatal fracture has 8% incidence* - This statement refers to a specific incidence rate for midpalatal fractures, which is a *correct factual statement* in the context of patterns of maxillary trauma. - Identifying specific incidence rates helps in understanding the epidemiology and typical presentations of maxillary injuries. *All four maxillary buttresses are rarely fractured together* - The maxilla is supported by four pairs of buttresses (*nasomaxillary, zygomaticomaxillary, pterygomaxillary, and vertical*) that dissipate forces. - It is uncommon for all four buttresses to be simultaneously fractured in a single traumatic event, as specific impact forces usually target certain areas.

Q: What is the primary aim of performing an abbreviated laparotomy in trauma surgery?

Haemostasis. ***Haemostasis*** - The primary aim of abbreviated laparotomy (damage control surgery) is to achieve **rapid control of life-threatening hemorrhage**. - This involves temporary measures to stop bleeding from major vessels and solid organ injuries, preventing exsanguination and further physiological deterioration. - **Damage control prioritizes hemorrhage control over definitive repair**, using techniques like packing, shunts, and temporary vessel ligation. *Definitive repair of all injuries* - This is specifically **NOT** the goal of abbreviated laparotomy. - Definitive repairs are **delayed** until the patient is physiologically stable (after resuscitation in ICU). - Attempting complete repair in an unstable patient leads to the "lethal triad" (hypothermia, acidosis, coagulopathy). *Reduction of contamination* - While contamination control is an **important component** of damage control surgery, it is typically **secondary to hemorrhage control**. - The sequence prioritizes stopping bleeding first, then controlling contamination from bowel injuries. *Rapid stabilization of the patient* - This is the **overall goal** of damage control surgery but not the specific primary aim of the laparotomy itself. - Stabilization is achieved **through** specific interventions during the abbreviated laparotomy, primarily haemostasis and contamination control.

Q: What is the volume threshold that defines a massive blood transfusion?

More than 10 units in 24 hours.. ***More than 10 units in 24 hours.*** - This is the **most widely accepted and standard definition** for a massive blood transfusion used in clinical practice and medical literature. - This threshold indicates that a patient has received a volume of blood products roughly equivalent to their **total blood volume** within a 24-hour period. - This definition is used to trigger **massive transfusion protocols (MTP)** in trauma and critical care settings. *Transfusion of 1 unit every 30 minutes for 6 hours.* - This scenario would result in 12 units over 6 hours, which does represent a massive transfusion situation clinically. However, the **standard textbook definition** refers to the total unit threshold over a 24-hour period, not a rate-based criterion. - While this rate of transfusion is critical and would trigger massive transfusion protocols, the question asks for the **volume threshold definition**, which is standardly stated as ≥10 units in 24 hours. *Transfusion of 5 units in 12 hours.* - This volume of transfusion is considered a **moderate to large transfusion**, not meeting the criteria for a massive blood transfusion. - While substantial and requiring close monitoring, it does not reach the commonly accepted threshold of 10 or more units within 24 hours. *Transfusion of 8 units in 24 hours.* - This amount is significant but falls short of the conventional definition of a **massive blood transfusion**, which requires 10 or more units in 24 hours. - While requiring aggressive management and monitoring, it doesn't meet the standard diagnostic threshold for massive transfusion.

Q: A 24-year-old man falls on the ground when he is struck in the right temple by a baseball. While being driven to the hospital, he lapses into coma. On examination, he is unresponsive with a dilated right pupil. Which of the following is the most important step in initial management?

CT scan of the head. ***CT scan of the head*** - A **CT scan of the head** is crucial for rapidly diagnosing the likely **epidural hematoma** suggested by the mechanism of injury (trauma to the temple, causing rupture of the **middle meningeal artery**) and rapid neurological deterioration with **fixed dilated pupil**. - This imaging will confirm the presence and size of the hematoma, guiding urgent surgical intervention if necessary. - Even in rapidly deteriorating patients, obtaining a CT scan (which takes only minutes) is essential to confirm diagnosis, localize the hematoma, and prevent operating on the wrong side. *Craniotomy* - While a **craniotomy** is the definitive treatment for an epidural hematoma, it should only be performed after a confirmed diagnosis via imaging. - Doing so without imaging risks unnecessary surgery or operating on the wrong side. *X-ray of the skull and cervical spine* - An **X-ray of the skull and cervical spine** would show bone fractures but would not directly visualize an intracranial hematoma, which is the immediate life-threatening issue. - While important for evaluating spinal stability in trauma, it is secondary to assessing intracranial pathology in this rapidly deteriorating patient. *Doppler ultrasound examination of the neck* - A **Doppler ultrasound of the neck** is used to assess vascular structures like the carotid and vertebral arteries. - This would not provide information on intracranial pressure or hematoma formation, which is the immediate concern given the patient's symptoms.

Q: Thoracotomy is indicated in all the following conditions except:

Pulmonary contusion. ***Pulmonary contusion*** - **Pulmonary contusion** is a bruise of the lung parenchyma that typically resolves with **supportive care** (oxygen, fluid management, analgesia, respiratory support) [1]. - It is generally *not* an indication for thoracotomy and is managed **conservatively** in most cases [1]. - Surgical intervention is only considered if complicated by other issues such as **uncontrolled hemorrhage**, massive hemothorax, or other injuries requiring exploration. *Penetrating chest injuries* - While approximately **85% of penetrating chest injuries** are managed conservatively with tube thoracostomy alone, **selective indications** for thoracotomy include: - **Cardiac tamponade** or suspected cardiac injury - **Great vessel injury** with hemodynamic instability - **Massive initial hemothorax** (>1500 mL) or persistent bleeding (>200 mL/hr) - **Trans-mediastinal trajectory** with suspected esophageal or major vascular injury - The key is that *specific criteria* determine need for thoracotomy, not the penetrating injury itself. *Rapidly accumulating haemothorax* - A **rapidly accumulating haemothorax** with **>1500 mL initial output** or **>200 mL/hour for 2-4 consecutive hours** indicates significant ongoing intrathoracic bleeding. - This is an **absolute indication** for thoracotomy for **source identification and hemorrhage control** [2]. - Without surgical intervention, such bleeding leads to **hemodynamic instability**, shock, and death. *Massive air leak* - A **massive persistent air leak** from chest tube, unresponsive to initial management, suggests a large **tracheobronchial injury** or major lung parenchymal disruption [3]. - This persistent leak prevents **lung re-expansion** and adequate ventilation. - Thoracotomy is indicated for **surgical repair** of the damaged bronchus, major airway, or extensive lung laceration [2].

Q: Tarsometatarsal amputation is also known as what?

Lisfranc amputation. ***Lisfranc amputation*** - A **Lisfranc amputation** is a surgical procedure that involves the disarticulation of the **tarsometatarsal joint**, effectively removing the forefoot while preserving the midfoot and hindfoot. - This specific anatomical plane defines the **tarsometatarsal amputation**, which is named after Jacques Lisfranc de St. Martin, who first described the surgical technique. *Chopart amputation* - A **Chopart amputation** involves disarticulation through the **midtarsal joint** (talonavicular and calcaneocuboid joints), which is more proximal than the tarsometatarsal joint. - This amputation preserves the talus and calcaneus but removes the entire midfoot and forefoot. *Pirogoff amputation* - A **Pirogoff amputation** is a type of ankle disarticulation that involves a **horizontal osteotomy of the calcaneus**, preserving a portion of the calcaneus and fusing it to the distal tibia. - This procedure is performed more proximally than a tarsometatarsal amputation and is designed to create an end-bearing stump. *Symes amputation* - A **Symes amputation** is an **ankle disarticulation** that removes the entire foot along with the malleoli, preserving the heel pad and attaching it to the distal tibia to create a weight-bearing stump. - This is a more proximal amputation than a tarsometatarsal amputation, involving the ankle joint rather than joints within the foot.

Q: Pelvic fracture is most commonly associated with which type of bladder injury?

Extraperitoneal bladder rupture. ***Extraperitoneal bladder rupture*** - **Pelvic fractures** are most commonly associated with **extraperitoneal bladder ruptures** (85-90% of bladder injuries from pelvic fractures). The tear in the bladder often occurs at the neck or anterior wall. These ruptures result from bone fragments from the pelvic fracture directly puncturing the bladder or from shearing forces. - Urine extravasates into the **retropubic space** and other extraperitoneal pelvic tissues, causing symptoms like suprapubic pain, hematuria, and difficulty voiding. - **Posterior urethral injuries** are also commonly associated with pelvic fractures (particularly pubic rami fractures), but among bladder injuries specifically, extraperitoneal rupture is most characteristic. *Intraperitoneal bladder rupture* - **Intraperitoneal bladder ruptures** are less common with pelvic fractures (10-15% of pelvic fracture-related bladder injuries) and typically occur from a direct blow to a **distended bladder**, causing rupture of the bladder dome. - Urine extravasates into the **peritoneal cavity**, leading to generalized abdominal pain, peritonitis, and potentially a larger volume of fluid accumulation. *Anterior urethral injury* - **Anterior urethral injuries** (e.g., bulbous or pendulous urethra) are usually caused by a **straddle injury** or direct trauma to the perineum. - They are generally **not associated with pelvic fractures**, which typically affect the **posterior urethra** (membranous portion) in males, particularly with pubic rami fractures.

Question 1

Which of the following statements is true regarding the rupture of the diaphragm?

Accepted Answer

Repair of a ruptured diaphragm is best approached via laparotomy.

Answer

Chest X-ray is the best diagnostic tool.

Answer

Laparoscopy is the standard approach for repair.

Answer

Diagnostic peritoneal lavage is the most relevant for diaphragm injuries.

Question 2

Which of the following is a contraindication to nonoperative management of splenic injury?

Accepted Answer

Hemodynamic instability

Answer

History of hematologic disorder

Answer

HIV infection

Answer

Presence of multiple solid-organ injuries

Question 3

A 50-year-old female with a 50 kg body weight suffered burns after a pressure cooker blast, involving 45% of her total body surface area. How much fluid should be given in the first 8 hours?

Accepted Answer

4.5 litres

Answer

4 litres

Answer

5 litres

Answer

6 litres

Question 4

Which of the following statements about maxillary fractures is false?

Accepted Answer

Pediatric maxillary fracture is more comminuted

Answer

Midpalatal fracture has 8% incidence

Answer

Geriatric maxillary fracture is difficult to treat

Answer

All four maxillary buttresses are rarely fractured together

Question 5

What is the primary aim of performing an abbreviated laparotomy in trauma surgery?

Accepted Answer

Haemostasis

Answer

Definitive repair of all injuries

Answer

Reduction of contamination

Answer

Rapid stabilization of the patient

Question 6

What is the volume threshold that defines a massive blood transfusion?

Accepted Answer

More than 10 units in 24 hours.

Answer

Transfusion of 1 unit every 30 minutes for 6 hours.

Answer

Transfusion of 5 units in 12 hours.

Answer

Transfusion of 8 units in 24 hours.

Question 7

A 24-year-old man falls on the ground when he is struck in the right temple by a baseball. While being driven to the hospital, he lapses into coma. On examination, he is unresponsive with a dilated right pupil. Which of the following is the most important step in initial management?

Accepted Answer

CT scan of the head

Answer

Craniotomy

Answer

Doppler ultrasound examination of the neck

Answer

X-ray of the skull and cervical spine

Question 8

Thoracotomy is indicated in all the following conditions except:

Accepted Answer

Pulmonary contusion

Answer

Rapidly accumulating haemothorax

Answer

Massive air leak

Answer

Penetrating chest injuries

Question 9

Tarsometatarsal amputation is also known as what?

Accepted Answer

Lisfranc amputation

Answer

Chopart amputation

Answer

Pirogoff amputation

Answer

Symes amputation

Question 10

Pelvic fracture is most commonly associated with which type of bladder injury?

Accepted Answer

Extraperitoneal bladder rupture

Answer

Intraperitoneal bladder rupture

Answer

Anterior urethral injury

Answer

Posterior urethral injury

Trauma — MCQs

Trauma — MCQs

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