Urgent laparotomy is necessary in cases of penetrating abdominal trauma when certain indications are present. These indications include peritonism, the presence of free air under the diaphragm on an upright chest X-ray, evisceration, hypotension or signs of unstable blood flow, a gunshot wound that has penetrated the peritoneum or retroperitoneum, gastrointestinal bleeding following penetrating trauma, genitourinary bleeding following penetrating trauma, the presence of a penetrating object that is still in place (as removal may result in significant bleeding), and the identification of free fluid on a focused assessment with sonography for trauma (FAST) or a positive diagnostic peritoneal lavage (DPL).

Further Reading:

Abdominal trauma can be classified into two categories: blunt trauma and penetrating trauma. Blunt trauma occurs when compressive or deceleration forces are applied to the abdomen, often resulting from road traffic accidents or direct blows during sports. The spleen and liver are the organs most commonly injured in blunt abdominal trauma. On the other hand, penetrating trauma involves injuries that pierce the skin and enter the abdominal cavity, such as stabbings, gunshot wounds, or industrial accidents. The bowel and liver are the organs most commonly affected in penetrating injuries.

When it comes to imaging in blunt abdominal trauma, there are three main modalities that are commonly used: focused assessment with sonography in trauma (FAST), diagnostic peritoneal lavage (DPL), and computed tomography (CT). FAST is a non-invasive and quick method used to detect free intraperitoneal fluid, aiding in the decision on whether a laparotomy is needed. DPL is also used to detect intraperitoneal blood and can be used in both unstable blunt abdominal trauma and penetrating abdominal trauma. However, it is more invasive and time-consuming compared to FAST and has largely been replaced by it. CT, on the other hand, is the gold standard for diagnosing intra-abdominal pathology and is used in stable abdominal trauma patients. It offers high sensitivity and specificity but requires a stable and cooperative patient. It also involves radiation and may have delays in availability.

In the case of penetrating trauma, it is important to assess these injuries with the help of a surgical team. Penetrating objects should not be removed in the emergency department as they may be tamponading underlying vessels. Ideally, these injuries should be explored in the operating theater.

In summary, abdominal trauma can be classified into blunt trauma and penetrating trauma. Blunt trauma is caused by compressive or deceleration forces and commonly affects the spleen and liver. Penetrating trauma involves injuries that pierce the skin and commonly affect the bowel and liver. Imaging modalities such as FAST, DPL, and CT are used to assess and diagnose abdominal trauma, with CT being the gold standard. Penetrating injuries should be assessed by a surgical team and should ideally be explored in the operating theater.

This patient is experiencing an increased heart rate and respiratory rate, as well as a decrease in urine output. Additionally, they are feeling anxious and confused. These symptoms indicate that the patient has suffered a class III haemorrhage at this point in time.

Recognizing the extent of blood loss based on vital signs and mental status abnormalities is a crucial skill. The Advanced Trauma Life Support (ATLS) haemorrhagic shock classification connects the amount of blood loss to expected physiological responses in a healthy 70 kg patient. In a 70 kg male patient, the total circulating blood volume is approximately five liters, which accounts for about 7% of their total body weight.

The ATLS haemorrhagic shock classification is summarized as follows:

CLASS I:
– Blood loss: Up to 750 mL
– Blood loss (% blood volume): Up to 15%
– Pulse rate: Less than 100 bpm
– Systolic BP: Normal
– Pulse pressure: Normal (or increased)
– Respiratory rate: 14-20 breaths per minute
– Urine output: Greater than 30 mL/hr
– CNS/mental status: Slightly anxious

CLASS II:
– Blood loss: 750-1500 mL
– Blood loss (% blood volume): 15-30%
– Pulse rate: 100-120 bpm
– Systolic BP: Normal
– Pulse pressure: Decreased
– Respiratory rate: 20-30 breaths per minute
– Urine output: 20-30 mL/hr
– CNS/mental status: Mildly anxious

CLASS III:
– Blood loss: 1500-2000 mL
– Blood loss (% blood volume): 30-40%
– Pulse rate: 120-140 bpm
– Systolic BP: Decreased
– Pulse pressure: Decreased
– Respiratory rate: 30-40 breaths per minute
– Urine output: 5-15 mL/hr
– CNS/mental status: Anxious, confused

CLASS IV:
– Blood loss: More than 2000 mL
– Blood loss (% blood volume): More than 40%
– Pulse rate: More than 140 bpm
– Systolic BP: Decreased
– Pulse pressure: Decreased
– Respiratory rate: More than 40 breaths per minute
– Urine output: Negligible
– CNS/mental status: Confused, leth

Recognizing the extent of blood loss based on vital sign and mental status abnormalities is a crucial skill. The Advanced Trauma Life Support (ATLS) classification for hemorrhagic shock correlates the amount of blood loss with expected physiological responses in a healthy individual weighing 70 kg. In terms of body weight, the total circulating blood volume accounts for approximately 7%, which is roughly equivalent to five liters in an average 70 kg male patient.

The ATLS classification for hemorrhagic shock is as follows:

CLASS I:
– Blood loss: Up to 750 mL
– Blood loss (% blood volume): Up to 15%
– Pulse rate: Less than 100 beats per minute (bpm)
– Systolic blood pressure: Normal
– Pulse pressure: Normal (or increased)
– Respiratory rate: 14-20 breaths per minute
– Urine output: Greater than 30 mL/hr
– CNS/mental status: Slightly anxious

CLASS II:
– Blood loss: 750-1500 mL
– Blood loss (% blood volume): 15-30%
– Pulse rate: 100-120 bpm
– Systolic blood pressure: Normal
– Pulse pressure: Decreased
– Respiratory rate: 20-30 breaths per minute
– Urine output: 20-30 mL/hr
– CNS/mental status: Mildly anxious

CLASS III:
– Blood loss: 1500-2000 mL
– Blood loss (% blood volume): 30-40%
– Pulse rate: 120-140 bpm
– Systolic blood pressure: Decreased
– Pulse pressure: Decreased
– Respiratory rate: 30-40 breaths per minute
– Urine output: 5-15 mL/hr
– CNS/mental status: Anxious, confused

CLASS IV:
– Blood loss: More than 2000 mL
– Blood loss (% blood volume): More than 40%
– Pulse rate: More than 140 bpm
– Systolic blood pressure: Decreased
– Pulse pressure: Decreased
– Respiratory rate: More than 40 breaths per minute
– Urine output: Negligible
– CNS/mental status: Confused, lethargic

A massive haemothorax occurs when more than 1500 mL of blood, which is about 1/3 of the patient’s blood volume, rapidly accumulates in the chest cavity. The classic signs of a massive haemothorax include decreased chest expansion, decreased breath sounds, and dullness to percussion. Both tension pneumothorax and massive haemothorax can cause decreased breath sounds, but they can be differentiated through percussion. Hyperresonance indicates tension pneumothorax, while dullness suggests a massive haemothorax.

The first step in managing a massive haemothorax is to simultaneously restore blood volume and decompress the chest cavity by inserting a chest drain. In most cases, the bleeding in a haemothorax has already stopped by the time management begins, and simple drainage is sufficient. It is important to use a chest drain of adequate size (preferably 36F) to ensure effective drainage of the haemothorax without clotting.

The airway is deemed at risk when the Glasgow Coma Scale (GCS) falls below 8. There are various factors that can lead to airway obstruction, including the presence of blood or vomit in the airway, a foreign object such as a tooth or food blocking the passage, direct injury to the face or throat, inflammation of the epiglottis (epiglottitis), involuntary closure of the larynx (laryngospasm), constriction of the bronchial tubes (bronchospasm), swelling in the pharynx due to infection or fluid accumulation (oedema), excessive bronchial secretions, and blockage of a tracheostomy tube.

ATLS guidelines now suggest administering only 1 liter of crystalloid fluid during the initial assessment. If patients do not respond to the crystalloid, it is recommended to quickly transition to blood products. Studies have shown that infusing more than 1.5 liters of crystalloid fluid is associated with higher mortality rates in trauma cases. Therefore, it is advised to prioritize the early use of blood products and avoid large volumes of crystalloid fluid in trauma patients. In cases where it is necessary, massive transfusion should be considered, defined as the transfusion of more than 10 units of blood in 24 hours or more than 4 units of blood in one hour. For patients with evidence of Class III and IV hemorrhage, early resuscitation with blood and blood products in low ratios is recommended.

Based on the findings of significant trials, such as the CRASH-2 study, the use of tranexamic acid is now recommended within 3 hours. This involves administering a loading dose of 1 gram intravenously over 10 minutes, followed by an infusion of 1 gram over eight hours. In some regions, tranexamic acid is also being utilized in the prehospital setting.

An anterolateral thoracotomy is a surgical procedure performed on the front part of the chest wall. It is commonly used in Emergency Department thoracotomy, with a preference for a left-sided approach in patients with traumatic arrest or left-sided chest injuries. However, in patients with right-sided chest injuries and profound hypotension but have not arrested, a right-sided approach is recommended.

The procedure is carried out in the following steps:
– An incision is made along the 4th or 5th intercostal space, starting from the sternum at the front and extending to the posterior axillary line.
– The incision should be deep enough to partially cut through the latissimus dorsi muscle.
– The skin, subcutaneous fat, and superficial portions of the pectoralis and serratus muscles are divided.
– The parietal pleura is divided, allowing entry into the pleural cavity.
– The intercostal muscles are completely cut, and a rib spreader is placed and opened to provide visualization of the thoracic cavity.
– The anterolateral approach allows access to important anatomical structures during resuscitation, including the pulmonary hilum, heart, and aorta.

In cases where there is suspicion of a right-sided heart injury, an additional incision can be made on the right side, extending across the entire chest. This is known as a bilateral anterolateral thoracotomy or a clamshell thoracotomy.

The most recent ATLS guidelines recommend using either the jaw-thrust or chin-lift techniques as the initial approach to open the airway in trauma patients. It is important to avoid moving the head and neck in patients with suspected cervical spine injuries. However, if the patient is unconscious and does not have a gag reflex, temporarily placing an oropharyngeal airway can be beneficial.

To perform the chin-lift technique, gently place your fingers under the mandible and lift it upwards to bring the chin forward. Use your thumb to slightly depress the lower lip and open the mouth. Alternatively, you can place your thumb behind the lower incisors while gently lifting the chin. It is crucial not to hyperextend the neck during the chin-lift technique.

For the jaw thrust technique, place one hand on each side of the mandible and push it forward. This can be done in conjunction with a bag-mask device to achieve a good seal and provide adequate ventilation. Just like with the chin-lift technique, be cautious not to extend the patient’s neck.

Low-velocity gunshot wounds to the abdomen result in tissue damage through laceration and cutting. On the other hand, high-velocity gunshot wounds transfer a greater amount of kinetic energy to the abdominal viscera. These types of wounds can cause more extensive damage in the surrounding area of the missile’s path due to temporary cavitation.

When patients experience penetrating abdominal trauma as a result of gunshot wounds, certain organs are more commonly injured. The small bowel is affected in approximately 50% of cases, followed by the colon in 40% of cases. The liver is injured in around 30% of cases, while abdominal vascular structures are affected in about 25% of cases.

Please note that these statistics have been obtained from the most recent edition of the ATLS manual.

A needle cricothyroidotomy is a procedure used in emergency situations to provide oxygenation when intubation and oxygenation are not possible. It is typically performed when a patient cannot be intubated or oxygenated. There are certain conditions that make this procedure contraindicated, such as local infection, distorted anatomy, previous failed attempts, and swelling or mass lesions.

To perform a needle cricothyroidotomy, the necessary equipment should be assembled and prepared. The patient should be positioned supine with their neck in a neutral position. The neck should be cleaned in a sterile manner using antiseptic swabs. If time allows, the area should be anesthetized locally. A 12 or 14 gauge over-the-needle catheter should be assembled to a 10 mL syringe.

The cricothyroid membrane, located between the thyroid and cricoid cartilage, should be identified anteriorly. The trachea should be stabilized with the thumb and forefinger of one hand. Using the other hand, the skin should be punctured in the midline with the needle over the cricothyroid membrane. The needle should be directed at a 45° angle caudally while negative pressure is applied to the syringe. Needle aspiration should be maintained as the needle is inserted through the lower half of the cricothyroid membrane, with air aspiration indicating entry into the tracheal lumen.

Once the needle is in place, the syringe and needle should be removed while the catheter is advanced to the hub. The oxygen catheter should be attached and the airway secured. It is important to be aware of possible complications, such as technique failure, cannula obstruction or dislodgement, injury to local structures, and surgical emphysema if high flow oxygen is administered through a malpositioned cannula.