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E. Degiannis et al.
Fig. 38.5 Resection and anastomosis of gunshot injury to the proximal intrathoracic trachea. Operative approach via a low transverse cervical incision with hyperextension of the neck in a young patient. (a) Gunshot
38.4 Operation
injury of the trachea (b) resection of the injured part of the trachea (c) suturing of the trachea (d) operative specimen of resected part of the trachea
the scapula out of the site of the incision. Secure the arm in this position to the ether screen or to an armrest. The antecu-
Proper positioning of the patient for posterolateral thoracot­omy will facilitate easy access to the injury (Fig.38.6). Start with placing the patient in a full lateral position. Extend the dependent arm at a right angle to the trunk, forearm/hand facing upwards. Fix the dependent leg at a right angle and keep the upper leg straight. Place a pillow between the two legs and another pillow beneath the chest, perpendicular to the patient. The latter will facilitate the thoracotomy by wid­ening the intercostal spaces at the operation site. At this point attention should be paid to the rm xation of the patient, to avoid undesirable body movements. Placement of a sandbag anteriorly and posteriorly together with the application of a strap over the padded superior anterior iliac crest will do the trick. Finally, position the upper arm by extending it in a cephalad direction as high as possible resulting in rotation of
bital fossa over the armrest must be padded, because of the risk of postoperative ulnar nerve paresis. The arterial line should be inserted at the radial artery of this forearm giving the anaesthetist easy access to do blood gases during the operation. Attach the diathermy pad to the upper thigh.
Stand behind the patient and start the incision from just lateral to the sternocostal junction to 1cm below the tip of the scapula, then curving upwards in the midline between the vertebral column and the medial margin of the scapula, almost reaching its upper border.
The wound is deepened by using diathermy coagulation current and dividing the muscles individually. With the inci­sion deepened down to the rib cage the individual ribs must be identied so that the thoracic cavity is entered through the appropriate intercostal space. To do this elevate the scapula
1
2
3
5
4
38 Penetrating Trauma totheMediastinal Trachea andMain Bronchi
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Fig. 38.6 Positioning of a patient for posterolateral thoracotomy. (1) Strap over hips to hold patient to the table (2) xation of position by sandbag (3) rolled towel beneath the chest (4) pillow under head (5) medial border of the scapula
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with a scapula retractor and slide your hand in the avascular space between the scapula and the chest wall as caudally as possible. Start counting the ribs from above down, beginning at the second, as the rst is usually impalpable. In the unlikely situation that this is not the case, you can differentiate between the rst and second ribs as there is a step between these two ribs. There is no step present between the second and third rib. Choose the appropriate intercostal space depending on the injury. Enter the thoracic cavity by divid­ing the intercostal muscles at the superior border of the rib. On visualizing the thoracic wall pleura, inform the anaesthe­tist to isolate the lung (if the patient has been intubated with a double-lumen tube). If the patient’s physiological condi­tion allows, gradually spread the ribs with a Finochietto retractor to avoid iatrogenic fractures. If a fast opening of the rib case is required and results in rib fractures, special care should be taken by the surgeon and the assistant to avoid injury from the rib spikes.
Simple lacerations are related to stab wounds and do not require debridement. They are repaired by interrupted absorbable sutures (e.g., 3-0 polyglycolic acid suture, 3-0 polydiaxanone suture) including 2–3 mm of mucosa and ensuring that the knots are outside, lowering the incidence of suture line granuloma and late stenosis. If the laceration involves the rigid portion of the trachea the sutures should be inserted through the brous tissue, that is between the C-shaped cartilages (Fig.38.7).
Injuries inicted by bullets can be related to loss of tissue and require adequate debridement. This, in the majority of cases, necessitates resection of part of the trachea with end­to- end anastomosis.
If resection is required, avoid extensive proximal and dis­tal dissection of the trachea to prevent damage to its blood
supply, that is segmental, as well as injury of the recurrent laryngeal nerve. While doing the distal resection, insert two stay sutures at 3 and 9 o’clock below the planned resection line so that you control the distal tracheal stump and prevent its retraction deeper into the mediastinum. This can particu­larly be the case with injuries of the upper thoracic trachea that were decided to be operated via a low transverse cervical incision.
On resecting part of the trachea, the anaesthetist and sur­geon cooperate closely. The anaesthetist hyperventilates the patient and pulls the endotracheal tube proximally to the site of the injury. The surgeon resects the injured part of the tra­chea and immediately passes another endotracheal tube into the lumen of the distal tracheal stump for further ventilation and anaesthesia (Fig. 38.8a, b). If possible, this “distal” endotracheal tube should be of a slightly smaller size to make it easier for the surgeon to work when placing the pos­terior sutures. Start the anastomosis by placing interrupted sutures on the posterior membranous wall of the trachea and on completion of this posterior suture line, remove the “dis­tal” endotracheal tube. Then the anaesthetist advances the original endotracheal tube, which was pulled above the site of the injury, distally bridging the anterior gap and entering the distal tracheal stump (Fig.38.8b). The anterior part of the anastomosis is then completed with interrupted peri­cartilaginous sutures (Fig. 38.8c). Overall, the type of the suture and the suturing technique is the one mentioned in the case of repair of simple lacerations.
If the suture line needs to be reinforced (e.g., penetrating injury involving both trachea and oesophagus), this should be done with a patch of the pericardium or a posteriorly based pedicled intercostal muscle ap. The homogenous pericardial patch can also be applied to close an isolated
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E. Degiannis et al.
Fig. 38.7 (a) Laceration of the right main bronchus due to stab wound. Endotracheal tube can be seen through the bronchial defect. (b) Simple repair by interrupted absorbable sutures
Fig. 38.8 Stages of resection and anastomosis of mediastinal trachea/main bronchi. The cooperation of the surgeon and anaesthetists is of paramount importance. (a) Tracheal defect after gunshot injury. (b) left: First endotracheal tube pulled proximally to the site of injury with second one being introduced into distal tracheal stump. right: Completion of posterior suture line. Removal of distal endotracheal tube and “original” endotracheal tube is advanced to enter the distal tracheal stump. (c) Completion of anterior part of anastomosis. (Reprinted with
permission from Springer, Penetrating Trauma, 2nd ed. by George C.Velmahos, Elias Degiannis, Dietrich Doll,
2015)
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b
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38 Penetrating Trauma totheMediastinal Trachea andMain Bronchi
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large defect of the posterior wall otherwise requiring an extensive resection resulting in excess anastomotic tension. In these cases, placing a silk suture from the chin to the manubrium will decrease tension and give the opportunity to the anastomotic line to “adapt”.
Injury of the carina may require intubation of both right and left bronchi. Major injuries of the two main bronchi requiring resection are similarly dealt with while main­taining ventilation by selective intubation of the opposite bronchus. One lung ventilation can cause hypoxia, due to the shunting of blood through the unventilated lung. Should this develop, it is easily overcome by clamping the pulmonary artery with a vascular clamp. This should be anticipated by exposing and taping the relevant pulmonary artery before interruption of the ventilation to the lung in question.
At the end of the operation, two intercostal drains should be inserted with an entry point just above the level of the diaphragm. The one drain should be straight, enter­ing at the anterior axillary line and being positioned ante­riorly to the lung with its tip at the apex. The second drain should be curved, entering the thoracic cavity at the poste­rior axillary line, with its tip posterior to the costophrenic angle.
Close the thoracic cage by inserting a gure of eight high tensile strength sutures (e.g., 1-0 polyglycolic acid suture), passing from the inferior border of the lower rib to the supe­rior border of the upper rib.
Remove the rolled towel from below the chest, approxi­mate the 2 ribs with a rib approximator and tie the sutures. The rest of the incision is closed in layers.
The endotracheal tube should be removed as soon as the patient can take satisfactory spontaneous respirations.
Important Points
• Gunshot wounds to the mediastinal trachea are related to the high incidence of concomitant injuries to other medi­astinal structures.
• Irrespective of the CT ndings a bronchoscopy should be undertaken to conrm or exclude the radiological diagnosis.
• The standard operative approach is via a posterolateral thoracotomy.
• In young people hyperextension of the neck can bring up half of the intrathoracic trachea into the neck. Therefore, an isolated injury of the upper mediastinal trachea can be dealt with via a low transverse cervical incision.
• The steps of the repair necessitate close cooperation between the anaesthetist and the surgeon.
• Always fashion a mucosa-to-mucosa repair with absorb­able sutures ensuring that the knots are outside.
Suggested Reading
Baisi A, Nosotti M, Ciof U, etal. Diagnosis of complete mainstem
bronchus avulsion in 3-dimensional spiral CT scan of the chest. Minerva Chir. 2003;58:587–9.
Hugh J, Milliken J, Chen JC.Management of tracheobronchial injuries
following blunt and penetrating trauma. Am Surg. 1997;63:896–9.
Jennings VA, Doll D, Degiannis E. Non operative management of
gunshot wounds to the cervical trachea with signicant tissue loss and 3D tracheography as a diagnostic tool: 2 case reports. (Case Report). Wehrmed Monatsschrift. 2017;61(9–10):240–4.
Palade E, Passlick B.Surgery of traumatic tracheal and tracheobron-
chial injuries. Chirurg. 2011;82:141–7.
Zhao Z, Zhang T, Yin X, etal. Update on the diagnosis and treatment of
tracheal and bronchial injury. J Thorac Dis. 2017;9:56–9.
Operative Management ofPulmonary
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Injuries
KatherineR.Iverson andMarcde Moya
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39.1 Background
Thoracic injuries account for approximately 30–40% of all traumatic injuries, contributing to over one-quarter of trau­matic deaths. While blunt thoracic trauma is much more common than penetrating injuries, the need for surgical intervention for blunt mechanisms is much lower. Less than 10% of blunt injuries will require surgery, compared to an operative rate of 15–30% in penetrating injuries. The major­ity of thoracic injuries requiring intervention can be man­aged with tube thoracostomy for pathology such as hemothorax and/or pneumothorax without the need for more invasive procedures. However, the indications for operative intervention broadly include severe or ongoing hemorrhage, inadequately drained hemorrhage (such as retained hemo­thorax), or concern for major cardiac or pulmonary/tracheo­bronchial injury. Penetrating mechanisms requiring surgical treatment include gunshot wounds which represent the majority of these cases, followed by stab wounds, and then impalements.
Pulmonary injuries, involving the lung parenchyma, are most commonly managed nonoperatively. This is especially true in the case of pulmonary contusions, the most common injury from blunt thoracic trauma. However, in patients undergoing thoracotomy, the incidence of lung injuries found from a penetrating mechanism ranges from 30% to 85%. Further, the incidence of minor or major lung resection at the time of thoracotomy from all injury mechanisms is estimated to be 20–30%. In this chapter, we will discuss the operative management of pulmonary injuries and intra­thoracic vascular injuries focusing on open thoracotomy.
K. R. Iverson · M. de Moya (*) Division of Trauma, Acute Care Surgery, Department of Surgery, Medical College of Wisconsin, Milwaukee, WI, USA e-mail: kiverson@mcw.edu; mdemoya@mcw.edu
39.2 Positioning andEquipment
The patient should be placed supine on the operating room table with both arms extended perpendicularly. The patient should be prepped from the chin to the knees to allow for sternotomy and saphenous vein grafts in the bilateral lower extremities if indicated. Essential equipment includes a Finochietto retractor or rib spreader, a sternal saw, Lebsche knife, lung (Duval) clamps, large vascular clamps preferably curved Crawford clamps, and linear cutting staplers (laparo­scopic staplers are helpful because of the articulation they allow). A dual-lumen tube or bronchial blocker is often needed for lung isolation.
39.3 Incision/Approach
A thoracotomy in the trauma patient is typically performed for hemodynamic instability or uncontrolled thoracic hemor­rhage after tube thoracostomy while maintaining access to the abdomen for potential operative intervention there. For this reason, the typical approach is through an anterolateral thoracotomy on the left for cardiac arrest, or the affected side in the case of hemorrhage. This is performed sharply through the fourth intercostal space found at the inframammary fold or nipple line externally. The incision extends from the ster­num medially to the latissimus dorsi laterally. Intercostal muscles and parietal pleura are divided with Mayo scissors sharply and a Finochietto rib spreader is placed for exposure. Attention should be paid to make an acutely curved incision following the superior border of the rib to avoid transection of the costal cartilage medially and the intercostal neurovas­cular bundle inferior to the rib. In cases of bilateral thoracic hemorrhage, the incision can be extended to the alternate side with the use of the Lebschke knife or other bone-cutting device to divide the sternum and expose the contralateral chest cavity through a clamshell thoracotomy. Care must be taken to identify the transected internal mammary arteries after this incision prior to closure.
© The Author(s), under exclusive license to Springer Nature Switzerland AG 2023 E. Degiannis et al. (eds.), Penetrating Trauma, https://doi.org/10.1007/978-3-031-47006-6_39
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In cases of pulmonary injury, the thoracotomy is the pre­ferred approach, however, alternate incisions may be consid­ered in the hemodynamically stable patient, based on the suspicion of other injuries. A sternotomy is the incision of choice for patients with possible concurrent great vessel or cardiac injury, with penetrating injuries medial to the mid­clavicular line. A left posterolateral thoracotomy is the inci­sion of choice for descending thoracic aortic injuries in a stable patient. The aortic arch and proximal left subclavian vessels can also be reached from a high approach on the left. Aerodigestive injuries including the thoracic esophagus and distal tracheal to bilateral mainstem bronchi are best approached through a right posterolateral thoracotomy.
*Key Point: For an anterolateral thoracotomy, attention
should be paid to make an acutely curved incision follow-
ing the superior border of the rib to avoid transection of
costal cartilage medially and the intercostal neurovascular
bundle inferior to the rib.
39.4 Pulmonary Injuries
Penetrating pulmonary injuries are most commonly identi­ed during a thoracotomy performed for the indication of hemorrhage or pneumothorax not adequately treated with tube thoracostomy. Accordingly, the procedure of choice is that which controls the bleeding or air leak with the least impact on the lung parenchyma. From least invasive to most invasive these techniques include suture repair, tractotomy, non-anatomic or wedge resection, lobectomy, and pneumo­nectomy. It should be noted that the extent of pulmonary resection directly correlates to the risk of mortality, with pneumonectomy leading to mortality in over 50% of patients, whereas tractotomy is associated with 10–15% mortality.
Supercial and peripherally located pulmonary lacera­tions can be repaired with 3-0 or 4-0 polypropylene sutures in a gure-of-eight or continuous running fashion. For through-and-through or deeply tracking wounds, a tractot­omy should be performed for fear of an uncontrolled tract. These tracts could lead to bleeding into the airways or a dev­astating air embolism to the pulmonary venous system. In a tractotomy, a linear stapler is placed through the tract of the penetrating injury to divide the overlying parenchyma and expose the extent of the underlying injury. This is most com­monly done with a linear (gastrointestinal anastomosis or GIA) stapler with 3.5–3.8mm staples (Fig.39.1).
Alternatively if one does not have access to linear staplers two large curved Crawford vascular clamps or even just two Kelley clamps can be used to clamp both sides of the tract. The surgeon then incises the parenchyma between the two clamps and oversews under each clamp (Fig.39.2b).
K. R. Iverson and M. de Moya
Fig. 39.1 GIA stapling device with one arm through the tract and the other on the outside of the lung prior to deploying the device
Any signs of bleeding or air leak are then controlled with the aforementioned suture techniques using an absorbable suture. The underlying hilar vessels may also be more read­ily visualized after tractotomy. Care must be taken to ensure the remaining lung tissue is viable after this approach. For areas of signicant injury or devascularization near the periphery of the lung, a non-anatomic or wedge resection may be required. Similarly, a linear stapler is used to resect the damaged area of the lung with reinforcing sutures as needed. The least amount of parenchyma should be resected to preserve as much viable lung tissue as possible.
A formal lobectomy or pneumonectomy is rarely required aside from cases with signicant central parenchymal dam­age or proximal hilar vessel injury not amenable to control and repair. This should only be performed if the above strate­gies fail or for the patient in extremis, given the high mortal­ity associated with these approaches. The initial approach involves mobilization of the lung by dividing the inferior pulmonary ligament, inferiorly to superiorly, to the level of the inferior pulmonary vein. For lobectomy, the ssure must also be separated. The major vessels are then dissected out starting at the hilum and extending to the lobar vessels. The relevant lobar vessels, superior and inferior pulmonary veins, and/or pulmonary arteries are ligated with a thoracoabdomi­nal (TA) stapler (2.5 mm) or suture ligated. Bronchi are divided transversely with a TA stapler (3.8mm) or clamped and sutured close with 4-0 polyester interrupted sutures. Stapled bronchial stumps should be reinforced with suture and muscle ap coverage when feasible and an air leak test should be performed. For a right pneumonectomy, the azy­gos vein should be identied. For a left pneumonectomy, care is taken to identify and preserve the phrenic, vagus, and left recurrent laryngeal nerves. Single lung ventilation can be achieved by advancing a single-lumen endotracheal tube into
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39 Operative Management ofPulmonary Injuries
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Fig. 39.2 Tractotomy with clamp technique; (a) placement of clamps with one arm of the clamp jaw in the tract and the other on the outside with a second clamp placed next to it; (b) divided lung parenchyma that will require suturing with an absorbable suture prior to removing clamps
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the left bronchus or using an endobronchial blocker on the left for right lung ventilation, as adjunctive strategies to a double-lumen tube.
distal control may require identication of its branching from the superior vena cava. Once identied, this vessel can be clamped and suture ligated.
When a penetrating hilar injury is identied, rapid proxi-
*Key Point: A tractotomy or wedge resection with a linear
cutting stapler is the most useful tool for hemorrhage or air leak control from pulmonary parenchymal injuries.
*Key Point: For pulmonary injuries, the principle of minimal
parenchymal resection is associated with better outcomes.
mal and distal control is paramount. Hilar control is achieved through nger occlusion, hilar twist, clamping with a large angled vascular (Satinsky) clamp, or application of umbilical tape and Rumel tourniquet. The hilar twist is rarely per­formed in practice but may be performed for a patient in extremis when appropriate tools are unavailable. This involves the rotation of the lung 180 degrees along the main bronchus to control life-threatening hemorrhage after the
39.5 Intrathoracic Vascular Injuries
inferior pulmonary ligament is divided. The apex of the upper lobe will now lie along the diaphragm and allow for
In addition to hilar injuries, there are a few other vessels in the chest which deserve special mention. Intercostal vessels are challenging to control given their location between two
temporary control until a more permanent solution is avail­able. A penetrating injury to the hilar vessel can be repaired with a running 5-0 polypropylene suture once identied.
ribs and bidirectional blood supply. Since it is often not fea­sible to perform a traditional gure-of-eight suture ligation, alternate techniques are required. One involves placing your stitch adjacent and parallel to the vessel in the intercostal muscle for suture ligation. If this is not successful, a large stitch that encircles the superior rib can be used to compress the entire neurovascular bundle around the rib. This often results in neuralgia, and thus this technique should be reserved for cases where the bleeding is not controlled with other methods. The internal mammary vessels running paral-
*Key Point: Techniques for intercostal vessel ligation include
suture ligation with the stitch oriented parallelly in the
intercostal muscle or occlusion with a stitch around the
superior rib. *Key Point: Hilar control is achieved through nger occlu-
sion, hilar twist, clamping with a large angled vascular
(Satinsky) clamp, or application of umbilical tape and
Rumel tourniquet.
lel to the sternum are more easily identied, clamped, and suture ligated.
39.6 Damage Control
The azygos vein, running vertically along the posterior thoracic wall and adjacent to the esophagus is another dif­cult to control injury. The typical approach is through a right­sided thoracotomy, which may require extension across the sternum to the left side for adequate exposure. Proximal and
Damage control thoracotomy may be indicated in patients requiring resuscitative thoracotomy for life-threatening hem­orrhage control, temporary packing for thoracic bleeding control, and/or temporary chest closure. Damage control
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K. R. Iverson and M. de Moya
thoracotomy is most commonly performed through a left anterolateral thoracotomy, especially in the case of hemody­namic instability. This incision can be extended into the right chest for a clamshell thoracotomy to expose the heart, medi­astinum, and right chest as indicated. The decision to pursue temporary thoracic closure is similar to the factors driving damage control laparotomy, namely coagulopathy, hypother­mia, acidosis, and injury severity. Packing with laparotomy pads may aid in hemostasis, especially along the chest wall. However, it is often difcult to pack the chest tightly enough. If there is a bullet or knife tract that is bleeding one can con­sider placement of a Foley catheter into the tract and inate the balloon. This catheter can then be brought out of the chest and removed the next day. A typical temporary dress­ing should consist of either a vacuum-assisted device, skin­only closure, or a clear adhesive lm for a seal and chest tubes in place for drainage.
*Key Point: Damage control thoracotomy and temporary
chest closure are guided by the principles of coagulopa-
thy, hypothermia, acidosis, hemodynamic instability, and
injury severity.
39.7 Conclusion
Operative management of pulmonary injuries is guided by the principles of expedient vascular control and minimizing parenchymal resection. The tips and tricks in this section are meant to optimize surgical success when facing these inju­ries. Tractotomy and non-anatomic wedge resection should be utilized to preserve underlying lung tissue. Techniques for managing specic intra-thoracic vascular injuries have been described, but the list is by no means exhaustive. Ultimately, the approach to pulmonary trauma will be guided by the patient’s clinical status, anticipated injury pattern, and avail­able resources.
Important Points
• For an anterolateral thoracotomy, attention should be paid
to make an acutely curved incision following the superior
border of the rib to avoid transection of costal cartilage
medially and the intercostal neurovascular bundle inferior
to the rib.
• A tractotomy or wedge resection with a linear cutting sta-
pler is the most useful tool for hemorrhage or air leak con-
trol from pulmonary parenchymal injuries.
• For pulmonary injuries, the principle of minimal paren-
chymal resection is associated with better outcomes.
• Techniques for intercostal vessel ligation include suture
ligation with the stitch oriented parallelly in the intercostal
muscle or occlusion with a stitch around the superior rib.
• Hilar control is achieved through nger occlusion, hilar
twist, clamping with a large angled vascular (Satinsky)
clamp, or application of umbilical tape and Rumel tourniquet.
• Damage control thoracotomy and temporary chest clo­sure are guided by the principles of coagulopathy, hypo­thermia, acidosis, hemodynamic instability, and injury severity.
Suggested Reading
Beshay M, Mertzlufft F, Kottkamp HW, Reymond M, Schmid RA,
Branscheid D, Vordemvenne T.Analysis of risk factors in thoracic trauma patients with a comparison of a modern trauma centre: a mono-centre study. World J Emerg Surg. 2020;15(1):1–10. https://
doi.org/10.1186/S13017- 020- 00324- 1/FIGURES/3.
Coleman JJ, Pieracci FM, DuBose JJ, Scalea TM, O’Connor JV.Chest
wall and lung. In: Feliciano DV, Mattox KL, Moore EE, editors. Trauma. 9th ed. McGraw Hill; 2020. https://accesssurgery.mhmedi-
cal.com/content.aspx?bookid=2952§ionid=249119875.
Gasparri M, Karmy-Jones R, Kralovich KA, Patton JH, Arbabi
S. Pulmonary tractotomy versus lung resection: viable options in penetrating lung injury. J Trauma. 2001;51(6):1092–7. https://doi.
org/10.1097/00005373- 200112000- 00013.
Ghanta RK, Wall MJ Jr, Mattox KL.Trauma thoracotomy: principles
and techniques. In: Feliciano DV, Mattox KL, Moore EE, editors. Trauma. 9th ed. McGraw Hill; 2020. https://accesssurgery.mhmedi-
cal.com/content.aspx?bookid=2952§ionid=249119807.
Hirshberg A, Mattox KL.Top knife: the art & craft of trauma surgery.
1st ed. Castle Hill Barns, Shrewsbury, UK: TFM Publishing; 2014.
Homo RL, Grigorian A, Lekawa M, Dolich M, Kuza CM, Doben AR,
Gross R, Nahmias J.Outcomes after pneumonectomy versus lim­ited lung resection in adults with traumatic lung injury. Updat Surg. 2020;72(2):547–53. https://doi.org/10.1007/s13304- 020- 00727- 4.
Huh J, Wall MJ, Estrera AL, Soltero ER, Mattox KL.Surgical manage-
ment of traumatic pulmonary injury. Am J Surg. 2003;186(6):620–
4. https://doi.org/10.1016/J.AMJSURG.2003.08.013.
Karmy-Jones R, Jurkovich GJ, Shatz DV, Brundage S, Wall MJ Jr,
Engelhardt S, Hoyt DB, Holcroft J, Knudson MM. Management of traumatic lung injury: a Western Trauma Association Multicenter review. J Trauma. 2001;51(6):1049–53. https://doi.
org/10.1097/00005373- 200112000- 00004. PMID: 11740249.
Karmy-Jones R, Namias N, Coimbra R, Moore EE, Schreiber M,
Mcintyre R, Croce M, Livingston DH, Sperry JL, Malhotra AK, Bif WL.Western Trauma Association Critical Decisions in Trauma: pen­etrating chest trauma. J Trauma Acute Care Surg. 2014;77(6):994–
1002. https://doi.org/10.1097/TA.0000000000000426.
Luchette FA, Bowyer MW, Byers PA, Cornwell EE, Cuschieri J, Gross
RI, Kuhls D. Operative exposure in thoracic trauma: exposure of pulmonary and hilar injuries. In: Advanced surgical skills for exposure in trauma. Chicago, IL: American College of Surgeons Committee on Trauma; 2010.
O’Connor JV, DuBose JJ, Scalea TM. Damage-control thoracic sur-
gery: management and outcomes. J Trauma Acute Care Surg. 2014;77(5):660–5. https://doi.org/10.1097/TA.0000000000000451.
Patel NJ, Dultz L, Ladhani HA, Cullinane DC, Klein E, McNickle
AG, Bugaev N, Fraser DR, Kartiko S, Dodgion C, Pappas PA, Kim D, Cantrell S, Como JJ, Kasotakis G. Management of sim­ple and retained hemothorax: a practice management guide­line from the Eastern Association for the Surgery of Trauma. Am J Surg. 2021;221(5):873–84. https://doi.org/10.1016/j.amj-
surg.2020.11.032. Epub 2020 Nov 17. PMID: 33487403.
Petrone P, Asensio JA.Surgical management of penetrating pulmonary
injuries. Scand J Trauma Resusc Emerg Med. 2009;17(1):8. https://
doi.org/10.1186/1757- 7241- 17- 8/FIGURES/6.
Operative Management ofDelayed
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Complications ofPulmonary andPleural Injury
GeorgeV.Oosthuizen, VictorY.Kong, andOferMerin
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40.1 Introduction
The incidence of penetrating thoracic trauma varies accord­ing to geography and in the United States accounts for up to 10% of all major trauma cases. Although relatively less com­mon than blunt injuries, it is a common preventable cause of mortality among trauma patients. Most penetrating thoracic injuries comprise stab wounds and gunshot wounds that are likely to be encountered at urban trauma centres. The vast majority of penetrating thoracic injuries can be managed with a chest tube alone and only 10–15% require emergency operation. However, a wide variety of complications can result from penetrating thoracic injuries that can lead to appreciable morbidity and even mortality.
40.2 Pleural Complications
40.2.1 Retained Hemothorax
40.2.1.1 Background
By denition, a retained hemothorax (RHTX) is said to be present when the hemothorax remains despite initial evacua­tion with a chest tube. Although the exact volume pertaining to this denition varies in the literature, the overall incidence of RHTX has been reported in up to 20% of cases. RHTX is signicant as it is also associated with the development of
G. V. Oosthuizen (*) Department of Surgery, Tygerberg Hospital, Stellenbosch University, Cape Town, South Africa
Department of Surgery, University of KwaZulu Natal, Durban, South Africa
V. Y. Kong Department of Surgery, Auckland City Hospital, University of Auckland School of Medicine, Auckland, New Zealand
O. Merin Department of Cardiothoracic Surgery, Shaare Zedek Medical Center, Hebrew University School of Medicine, Jerusalem, Israel e-mail: merin@szmc.org.il
other pulmonary and pleural space complications such as pneumonia, empyema and brothorax. The primary cause of RHTX is thought to be related to incomplete evacuation of initial hemothorax via chest tube. Various risk factors have been identied to be associated with RHTX, which include initial hemothorax volume on CT, high chest tube output, duration of chest tube, and total number of chest tubes. A recent Eastern Association for the Surgery of Trauma (EAST) multi-institutional trial demonstrated that RHTX was inde­pendently associated with a larger hemothorax on presenta­tion, with a 15% increase in risk of developing RHTX for each additional 100mL of hemothorax on initial CT imag­ing. Furthermore, unsuccessful treatment was associated with worse functional outcomes at discharge.
40.2.1.2 Investigations
RHTX is usually suspected when the initial chest tube fails to evacuate the hemothorax and can be seen on the chest radiograph (CXR). However, the literature suggests that the minimum amount of pleural uid required to cause blunting of the costophrenic angle on erect CXR is 300mL.In supine patients, this can take up to 1000mL. Although ultrasound remains a useful adjunct, cross-sectional imaging with CT is the current standard and can accurately detect RHTX and other associated complications. While the amount of uid that constitutes RHTX remains debatable, quantifying the amount on CT is equally controversial. The most common method of estimating RHTX volume on CT was proposed by Mergo etal., which is derived from the measurement of the greatest depth of hemothorax from the chest wall, craniocau­dal length, number and thickness of the CT slides. A useful screening test to determine whether RHTX may be clotted or loculated (and therefore not amenable to drainage by repeat chest tube) is a lateral decubitus CXR.The patient is placed in the lateral position for 3–5min, after which an anteropos­terior shoot-through is performed. The lateral decubitus lm is compared with the upright, and if run-off of the pleural collection has occurred after the change in body position, the pleural contents are deemed to be liquid, and likely to be
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evacuated by a repeat chest tube. If no run-off is noted, the collection is deemed to be clotted or loculated and repeat chest tube is not likely to succeed. Chest CT may be helpful to differentiate between consolidation and collection, and to plan further management.
40.2.1.3 Management
In practice, various management strategies have been pro­posed and the exact approach varies depending on the resources of the individual institution. The options include observation, repeat chest tube, intrapleural lytic therapy, video- assisted thoracoscopic surgery (VATS), and thoracotomy.
Observation
Historical series on experimental observation suggested that pleural blood can be absorbed spontaneously and most sug­gest that a small RHTX (dened as <300 mL) may be observed. The natural history of these patients with small RHTX under observation is not well dened but it has been suggested that it may be successful in over 80% of cases.
Repeat Chest Tube
Repeating chest tubes in an attempt to evacuate RHTX is logical and a technically simple procedure. This can be accomplished by either open surgical technique or radiologi­cal guidance. This offers an advantage for patients with sig­nicant co-morbidities in which major operative options are best avoided. In a landmark AAST trial, a second chest tube was successful in 36% of cases, while success rate with radiologically guided drainage procedure was 59%. However, up to 25% of all RHTX in their study required at least two procedures to successfully manage the RHTX.As a separate caveat, there is evidence to suggest that the risk of develop­ing empyema increases with each subsequent insertion of chest tube and increases signicantly beyond the second attempt. Clotted or loculated RHTX and empyema are gen­erally not amenable to evacuation by chest tube.
Intrapleural Lytic Therapy
Fibrinolytic therapy with a pharmacological agent such as alteplase has demonstrated positive results. It relies on plas­minogen activation that triggers brinolysis and thereby allowing dissolution and evacuation of RHTX.Data from the abovementioned AAST trial on patients who underwent intrapleural lytic therapy as the initial treatment showed that over two-thirds subsequently still required a second proce­dure to manage the RHTX.Other studies have demonstrated better efcacy. A systematic review has suggested the advan­tage of allowing patients to avoid surgery in over 80% of cases. Studies comparing intrapleural lytic therapy to evacu­ation via video-assisted thoracoscopic surgery have also been inconsistent in demonstrating superiority. To date, the
exact case selection remains controversial but intrapleural lytic therapy may likely be benecial in poor surgical candidates.
Video Assisted Thoracoscopy (VATS)
VATS has increasingly gained popularity in the management of RHTX. Early studies showed benet for VATS when employed following the failure of a repeat chest tube or when a large volume (>900mL) of RHTX is present. VATS is tech­nically simple and is especially useful in managing loculated RHTX. The optimal timing of VATS has yet to be deter­mined. Although the correlation between the timing of VATS and the success rate has not been entirely agreed upon, emerging evidence is in support of early VATS and is associ­ated with reduced length of hospital stay and reduction in the need for thoracotomy.
Thoracotomy
Historically this was the default operation which has now been replaced by VATS.This is usually reserved for cases in which empyema has become advanced or in which other options have been unsuccessful.
40.2.2 Empyema
40.2.2.1 Background
Empyema is dened as pus in the pleural space and com­monly results from pleural space infection in the setting of retained hemothorax or pneumonia. It is important to note that the chest tube procedure itself can potentially introduce infection into the pleural space and the rate of empyema fol­lowing thoracic trauma has been reported to range from 3% to 30%. Prophylactic antibiotics for chest tube insertion have been a subject of controversy for many years. A recent sys­tematic review has shown that prophylactic antibiotic admin­istration was associated with a reduced risk of empyema and pneumonia. The natural history of empyema is well recog­nised and is classically described in three stages, namely the exudative, brinopurulent, and organising stages.
40.2.2.2 Investigations
Early cross-sectional imaging with CT will allow the charac­terisation and extent of the empyema to be determined.
40.2.2.3 Management
Broad-spectrum antibiotics and guidance by bacterial cul­ture are important components of management. A prolonged course of antibiotics is often required. However, the princi­pal concept is that empyema should be viewed in similar light as an abscess, meaning it should be drained. In the exu­dative phase, empyema may be drainable via chest drain. In the brinopurulent phase, loculations and a brinous cap-