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Original paper

Thoracoscopic treatment of iatrogenic injuries of the tracheobronchial tree: a retrospective analysis of 5 cases and review of the literature

Aleksandr Karpitski
1
,
Andrei Shestiuk
2
,
Siarhei Panko
3
,
Henadzi Zhurbenka
1
,
Denis Vakulich
1
,
Aliaksandr Ihnatsiuk
1

1.
Department of Thoracic Surgery, Brest Regional Hospital, Brest, Belarus
2.
Department of Anatomy and Physiology, Brest State University, Brest, Belarus
3.
Collegium Medicum, Jan Kochanowski University, Kielce, Poland
Videosurgery Miniinv
Online publish date: 2021/06/30
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Introduction

Iatrogenic injuries of the tracheobronchial tree are rare but dramatic and potentially lethal complications of some procedures such as orotracheal intubation, percutaneous dilational tracheostomies, mediastinoscopy, and excision of advanced tumours with mediastinal involvement [1–3]. The membranous tracheobronchial damage can sometimes be caused by compression of the trachea with oesophageal prostheses [4] and intratracheal stent insertion [5]. Therapeutic options (conservative or surgical) for iatrogenic tracheobronchial ruptures (ITR) are still under debate. However, surgical repair is used in more than 50% [6] of the cases even though conservative therapy development allows successful conservative management of some lesions up to 7.5 cm in size [7]. Surgical treatment is indicated in ITR patients with the following: (1) intra-operatively diagnosed injuries [8], (2) postintubation para-carinal lacerations, (3) progressive pneumomediastinum, subcutaneous emphysema and a mediastinitis, (4) major air leak via pleural drainages, and (5) large defect size (> 3–4 cm or > 1/3 diameter, especially with prolapsed oesophageal wall) [9]. Primary repair is the treatment of choice in ITR, but the surgical approach depends on the laceration site [10]. If the injury occurs in the proximal 2/3 of the trachea, the preferred incision site may be the neck [11], while injures to the distal trachea with bifurcation and both main bronchi [12] require a thoracotomy. Many different effective techniques involving reinforcement and/or buttressing of the suture line have been described for the mentioned approaches, but only a few of them employed video-assisted thoracic surgery (VATS).

Aim

The purpose of our research was to analyse our experience of ITR treatment using minimally invasive thoracoscopic procedures.

Material and methods

We performed a retrospective review of the data received from 5 consecutive patients (1 male) with a mean age of 52 years (range: 32–56 years) treated for iatrogenic injuries to the tracheobronchial tree (ITR) by video-assisted thoracic surgery repair (VATS-R) at our hospital between October 2015 and April 2018. The study was approved by our institutional ethics committee. Written informed consent from the patients was waived because this was a retrospective study, and this consent had been obtained from each patient before any surgery/invasive procedures were performed. The demographic and clinical characteristics of the patients prior to the onset of the VATS-R treatment are summarized in Table I. The urgent examination techniques employed before the surgery were thoracic computed tomography (TCT) and fibreoptic tracheobronchoscopy (FBS). Surgical technique for VATS repair of the tracheal laceration. The patient was intubated with a single lumen tube positioned in the left main bronchus and turned to the left lateral decubitus position.
The surgery was performed by a team of 2 thoracic surgeons. Four trocars were placed into the right pleural cavity to perform VATS oesophagectomy and/or repair all these lacerations: a 12-millimetre optical port was inserted in the 7th intercostal space along the posterior axillary line, a 10-mm port was placed in the 4th intercostal space along the mid-axillary line, one 5-mm port was located at the level of the scapula angle, and the other one was placed in the 4th intercostal space along the posterior axillary line. After the mobilization of the trachea, its rupture was closed using interrupted U-type absorbable sutures of the Vicril 2.0, which, having been tied together outside the lumen of the trachea, were additionally sutured through the wall of the oesophagus (P1-3) or the wall of the gastric conduit/tube (P4 and P5) to cover the suture line. When the absence of air leakage through the reinforced repair site was confirmed by an intraoperative underwater pressure test (30 cm H2O), the pleural cavity was drained with 2 chest tubes, 1 of which was placed near the suture line, and then trocar wounds were sutured. At the end of the operation, all of the patients were extubated in the operating room. Postoperative medical treatment included broad-spectrum antibiotic therapy against tracheobronchial flora and anti-inflammatory therapy. All patients underwent a FBS control and were informed, before leaving the hospital, about the initial symptoms of airway obstruction and stenosis, as well as the need to immediately contact our department if these symptoms appeared.

Results

The cause of these lacerations in 3 patients was a single lumen tube orotracheal intubation for emergency (2 patients) and elective (1 patient) surgery outside the chest. All the patients with a postintubation tracheal injury had mild-to-severe obesity (BMI range: 26–39 kg/m2) as a risk factor, and 2 of them were females aged > 50 years with short stature. In the remaining patients, tracheal damage occurred during a video-assisted thoracoscopic resection of the oesophagus for surgical treatment of the fourth stage of achalasia – the sigmoid oesophagus. In 4 patients, chest TCT and FBS were used to confirm clinical suspicions and to determine the location and the extent of the membranous tracheal wall rupture, and in 1 the tracheal damage was diagnosed intraoperatively by direct visualization (Table I). Mean length of injury was 45 mm, ranging from 35 to 60 mm. Two post-intubation cases of ITR were suspected immediately after extubation, confirmed by TCT and FBS, and delivered to our department from other hospitals within 5–6 h. The third post-intubation patient (P3) with no tracheal rupture signs and symptoms was referred to our hospital on the third postoperative day after a laparoscopic emergency cholecystectomy for obstructive jaundice (choledocholithiasis) and cholangitis treatment. Tracheal injury symptoms (Table I) appeared unexpectedly in this patient and were discovered by an anaesthesiologist inducing general gas mixture anaesthesia through a mask to perform endoscopic papillosphincterotomy. The injury to the distal third of the trachea was confirmed by prompt FBS, which revealed a calloused rupture with maceration and fibrin plaques. Having had her right pleural cavity drained and prompt TCT performed, the patient underwent the VATS-R with simultaneous endoscopic papillosphincterotomy and laparoscopic drainage of the ductus choledochus. A month later, when she was re-hospitalized, the choledochal stone was endoscopically extracted with a Dormia basket. Two years later, TCT (Photo 1) and FBS control (Photo 2) showed no signs of tracheal stenosis in this patient. In patients with end-stage achalasia, who underwent thoracoscopic resection of the oesophagus before the creation of a gastric conduit and a gastro-oesophageal anastomosis in the neck by open surgery, the tracheal rupture was diagnosed intraoperatively by direct visualization in one (P4) and by TCT and FBS on the next postoperative day in another patient (P5). Thus, the diagnostic delay between the intervention that caused the injury and its confirmation ranged from 0 (intraoperative finding) to 96 h (postintubation “hidden damage”), but most injuries were diagnosed within the first 24 h. Therefore, although prompt diagnosis is essential for patients’ survival, the mean diagnostic delay was 26 h, which corresponds to other authors [13]. The mean duration of the VATS repair with the suture line reinforcement was 103 min (ranging from 60 to 180 min). The postoperative course was uneventful in all the patients, who were discharged on average after 16 days (ranging from 8 to 22 days) without any respiratory and swallowing problems. An FBS control performed prior to discharge from the hospital revealed per primam healing of these injuries in each case. To date, based on the information obtained from the patients by telephone follow-up surveys, none of them have needed additional consultations and treatment of airway complications.

Discussion

The incidences of iatrogenic tracheal rupture presented in research literature are as follows: 0.05–0.37% cases took place during endotracheal intubation [1], 0.4% – during thoracoscopic and transhiatal resection of the oesophagus, and 0–0.2% cases during open oesophageal surgery [3]. The ITR incidence is related to objective conditions of instrumentation, associated illnesses in patients and their morphology, the medical staff’s experience and skills, etc. [8]. However, the real incidence of the intraoperative and postintubation injury to the tracheobronchial tree is difficult to estimate because these complications have no statistical code of their own in the 10th Revision of the International Statistical Classification of Diseases and Related Health Problems (ICD-10). Research literature contains no data regarding the incidence of injury to the trachea or main bronchi during a VATS esophagectomy, although tracheal injuries may occur in 1–10% of non-VATS oesophagectomies [14]. A classic surgical approach to tracheobronchial injury repair is right posterolateral thoracotomy through the fourth or fifth intercostal space, which offers excellent exposure to the distal trachea with bifurcation and both primitive bronchi [12]. In recent years, there has been a strong trend towards non-operative and minimal invasive management of iatrogenic tracheal injuries [6]; however, thoracoscopic minimally invasive techniques are seldom mentioned in research literature [15]. During its historical evolution, ITR surgical treatment has evolved from open surgical approaches to all cases (preferably by thoracotomy) through varying transcervical-transtracheal approaches [16], using a fibreoptic bronchoscope [17] and other mini-optic instruments as guiding tools [18] to full minimally invasive techniques based on VATS [15]. However, for no clear reason, the use of the latter in the treatment of intraoperative [3] and postintubation [15] injuries has received little coverage in research literature. We were unable to find any descriptions of intraoperative injury to the trachea in the course of subtotal VATS oesophagectomy for the treatment of achalasia (P4), or the same aetiology injury with a postoperative 24-hour diagnostic delay (P5), which were treated by full minimally invasive VATS repair, when the rupture of the trachea may have occurred due to the damage of its thin, inflammatorily changed membranous wall by an electrocauter during an oesophageal dissection. Even large para-carinal lesions can be treated with minimal invasion by using VATS-R, which was affirmed by the successful management of a patient (P2) with injury to the tracheal bifurcation and the right main bronchus. In addition, VATS repair allows the principle of minimally invasive surgery to be maintained in treating patients with more than one post-operative complication, each requiring emergency surgical correction. This approach was presented in a patient (P3) who simultaneously underwent thoracoscopic and laparoscopic surgery. Summing up, the VATS-R minimally invasive technique, although neither very quick nor easy to perform, provides excellent results and avoids the use of, or conversion to, conventional thoracotomy, despite the fact that prompt on-table identification and adequate (open) surgical treatment of ITR is necessary for a good outcome [14]. As the current improvement of thoracoscopic technique and thoracic surgeons’ experience/skills leads to decreases in the operative time, in the near future VATS repairs will take their deserved place in the surgery of iatrogenic injuries located in the distal third of the trachea and/or main bronchi. We believe that mid-distal, full-thickness membranous tracheal tears may be treated by direct VATS suture reinforced with the apposition of the oesophagus or gastric tube to the posterior trachea without a significant risk of early or late complications.

Conclusions

The minimally invasive thoracoscopic approach may be the method of choice in the treatment of intraoperative and post-intubation injuries of the tracheobronchial tree by direct suturing and suture line reinforcement.

Conflict of interest

The authors declare no conflict of interest.

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Copyright: © 2021 Fundacja Videochirurgii This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) License (http://creativecommons.org/licenses/by-nc-sa/4.0/), allowing third parties to copy and redistribute the material in any medium or format and to remix, transform, and build upon the material, provided the original work is properly cited and states its license.
  
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