Management of Complications After Lung Resection: Prolonged Air Leak and Bronchopleural Fistula

Chest tube removal at different gas flows in prolonged air leak: a randomized non-inferiority trial

OBJECTIVES

To evaluate the safety and feasibility of removing drainage tubes at larger size of air leak in patients with prolonged air leak after pulmonary surgery.

METHODS

Ninety-five patients who underwent pulmonary surgery with prolonged air leak in our centre were enrolled in this randomized controlled, single-centre, non-inferiority study. The drainage tube was clamped with a stable size of air leak observed over the last 6 h, which was quantified by gas flow rate using the digital drainage system. The control group (n = 48) and the study group (n = 46) had their drainage tube clamped at 0-20 ml/min and 60-80 ml/min, respectively. We continuously monitored clinical symptoms, conducted imaging and laboratory examinations, and decided whether to reopen the drainage tube.

RESULTS

The reopening rate in the study group was not lower than that in the control group (2.08% vs 6.52%, P > 0.05). The absolute difference in reopening rate was 4.44% (95% confidence interval -0.038 to 0.126), with an upper limit of 12.6% below the non-inferiority margin (15%). There were significant differences in the length of stay [16.5 (13-24.75) vs 13.5 (12-19.25), P = 0.017] and the duration of drainage [12 (9.25-18.50) vs 10 (8-12.25), P = 0.007] between the control and study groups. No notable differences were observed in chest X-ray results 14 days after discharge or in the readmission rate.

CONCLUSIONS

For patients with prolonged air leak, removing drainage tubes at larger size of air leak demonstrated similar safety compared to smaller size of air leak, and can shorten both length of stay and drainage duration.

CLINICAL TRIAL REGISTRATION NUMBER

Name of registry: Gas flow threshold for safe removal of chest drainage in patients with alveolar-pleural fistula prolonged air leak after pulmonary surgery. Registration number: ChiCTR2200067120. URL: https://www.chictr.org.cn/.

An update on bronchopleural fistulae following cancer-related surgery

PURPOSE OF REVIEW

Bronchopleural fistulae (BPF) are rare complications in cancer-related surgery but impart significant morbidity and mortality. BPF may be difficult to identify, with a broad differential diagnosis at presentation, so it is critical to be aware of newer diagnostic and therapeutic approaches for this disease entity.

RECENT FINDINGS

Multiple novel diagnostic and therapeutic interventions are featured in this review. Reports of newer bronchoscopic techniques to localize BPF, as well as approaches for bronchoscopic management, like stent deployment, endobronchial valve placement, or alternative interventions when indicated are discussed, paying particular attention to factors that influence procedure selection.

SUMMARY

Management of BPF remains highly variable, but several novel approaches have shown improved identification and outcomes. Although a multidisciplinary approach is imperative, an understanding of these newer techniques is important to provide optimal care for patients.

Repeated Pulmonary Metastasectomy: Third Operations and Beyond

BACKGROUND

For extrathoracic malignant neoplasms that have metastasized to the lungs, previous investigations have demonstrated both oncologic and survival benefits after pulmonary and repeated metastasectomy. Little is known about the feasibility of incrementally increasing numbers of subsequent metastasectomy procedures.

METHODS

We conducted a retrospective review of patients who underwent ≥3 pulmonary resection procedures for recurrent, metachronous metastatic disease of nonlung primary malignant neoplasms at a single institution between 1992 and 2020. Primary outcomes collected pertained to safety and feasibility, including estimated blood loss (EBL), hospital length of stay, and details of postoperative complications.

RESULTS

There were 117 patients who met inclusion criteria, having undergone at least 3 metastasectomy operations, with 55 (47.1%) undergoing a fourth operation and 20 (17.1%) undergoing a fifth operation. EBL did not differ between first and second operations (106.6 mL vs 102.5 mL; P = .76). It was, however, significantly greater at third operations (102.5 mL vs 238.7 mL; P = .000016). We noted an increase in wound complications between the second and third operations (0.9% vs 6.8%; P = .02) and incremental increases in likelihood of prolonged air leak with each subsequent operation. The need for reoperation was low for all and similar between operations. Importantly, hospital length of stay was similar for all procedures, as were the frequencies of hospital readmission.

CONCLUSIONS

Third-time redo pulmonary metastasectomy can be performed safely and feasibly in select patients. Further repeated resection should remain a therapeutic option for patients, although risks for potentially longer operating time, greater EBL, and prolonged air leaks may be anticipated.

Intraoperative Determination of Bronchus Stump and Anastomosis Perfusion with Hyperspectral Imaging

BACKGROUND

The intraoperative evaluation of bronchus perfusion is limited. Hyperspectral Imaging (HSI) is a newly established intraoperative imaging technique that enables a non-invasive, real-time perfusion analysis. Therefore, the purpose of this study was to determine the intraoperative perfusion of bronchus stump and anastomosis during pulmonary resections with HSI.

METHODS

In this prospective, IDEAL Stage 2a study (Clinicaltrials.gov: NCT04784884) HSI measurements were carried out before bronchial dissection and after bronchial stump formation or bronchial anastomosis, respectively. Tissue oxygenation (StO₂; upper tissue perfusion), organ hemoglobin index (OHI), near-infrared index (NIR; deeper tissue perfusion) and tissue water index (TWI) were calculated.

RESULTS

Bronchus stumps showed a reduced NIR (77.82 ± 10.27 vs 68.01 ± 8.95; P = 0,02158) and OHI (48.60 ± 1.39 vs 38.15 ± 9.74; P = <.0001), although the perfusion of the upper tissue layers was equivalent before and after resection (67.42% ± 12.53 vs 65.91% ± 10.40). In the sleeve resection group, we found both a significant decrease in StO 2 and NIR between central bronchus and anastomosis region (StO₂: 65.09% ± 12.57 vs 49.45 ± 9.94; P = .044; NIR: 83.73 ± 10.92 vs 58.62 ± 3.01; P = .0063). Additionally, NIR was decreased in the re-anastomosed bronchus compared to central bronchus region (83.73 ± 10.92 vs 55.15 ± 17.56; P = .0029).

CONCLUSIONS

Although both bronchus stumps and anastomosis show an intraoperative reduction of tissue perfusion, there is no difference of tissue hemoglobin level in bronchus anastomosis.

[Diagnosis and treatment of bronchopleural fistula after anatomical lung resections]

OBJECTIVE

To assess the factors causing air leakage after anatomical lung resections and present a rational tactical approach for timely establishing the cause and level of bronchial fistula.

MATERIAL AND METHODS

We analyzed 723 patients who underwent anatomical lung resection (pneumonectomy - 136 patients, anatomical lobectomy and segmentectomy - 513, video-assisted anatomical resection - 74 patients).

RESULTS

In 506 (69.9%) cases, complete lung inflation after surgery was observed within 24-48 hours. Persistent air discharge for more than 3 days was observed in 141 (19.5%) patients. Prolonged air leakage for more than 7 postoperative days occurred in 50 (6.9%) patients. Air discharge for more than 10 days was considered abnormal and observed in 20 (2.8%) patients. Redo surgeries were performed in 49 patients with bronchopleural fistula at the level of segmental bronchi. Forty-two patients after primary thoracoscopy and 6 ones after primary thoracotomy underwent video-assisted resection of the lung with bronchopleural fistula after previous surgery. In 11 patients, re-thoracotomy was performed: middle lobectomy after previous right-sided upper lobectomy in 2 patients, lung resection after previous segmentectomy in 8 cases and atypical resection of bulla after previous right-sided lower lobectomy in 1 case.

CONCLUSION

Surgical approach for persistent postoperative air leakage involves various surgical interventions. The best option is minimally invasive thoracoscopic procedure. This method is valuable to visualize bronchopleural fistula, eliminate air leakage, additionally reinforce pulmonary suture and perform targeted adequate drainage of the pleural cavity.

Persistent alveolar air leak following pulmonary lobectomy: an old problem in a modern era

Persistent alveolar air leak (PAAL) after major lung resection remains a common complication in thoracic surgery. The aim of this study was to identify a subset of patients with high risk of developing PAAL after pulmonary lobectomy. Another objective was to evaluate the influence of PAAL on postoperative complications and length of hospital stay. A retrospective analysis on 895 patients undergoing pulmonary lobectomy from January 2014 to December 2019 was performed. PAAL was defined as air leak lasting more than 5 days after lung surgery. Univariate analyses and logistic regressions were performed to identify the predictors of PAAL. A backward selection algorithm was used to identify the optimal set of predictors. The incidence of PAAL was 8.2% (74/895). Male gender (p=0.017), BMI (p<0.001), transient ischemic attack (p=0.031), FEV1 (p=0.018), lobectomy combined with adjacent subsegmentectomy (p=0.018), partial and extended pleural adhesions (p=0.033 and p=0.038, respectively) were identified as independent risk factors for PAAL through logistic regression. A weak positive correlation was found between video-assisted thoracic surgery (VATS) and PAAL following pulmonary lobectomy (p=0.100). PAAL was found to be associated with higher risk of postoperative morbidity (p=0.002) and with longer hospital stay (p<0.001). Both preoperative and intraoperative risk factors may be responsible for PAAL after pulmonary lobectomy. VATS does not appear to prevent this postoperative complication. An alveolar air leak lasting beyond 5 days after pulmonary lobectomy is associated with worse postoperative outcomes.

Clinical and Economic Burden Associated with Prolonged Air Leaks Among Patients Undergoing Thoracic Resection: A Retrospective Database Analysis

Purpose

Prophylactic use of lung sealants among patients undergoing thoracic resection has been reported for the management of intraoperative air leaks and is associated with a lower incidence of prolonged air leak (PAL) and a shorter length of stay (LOS). This study estimated the incremental economic and clinical burden of PAL among patients with lung sealants used during thoracic resection in the United States.

Patients and Methods

This retrospective analysis examined hospital data (Premier Healthcare Database) for adults (age ≥18 years) with inpatient thoracic resection between October 2015 - March 2021 (first admission=index) and lung sealant used during their procedure. Follow-up extended through 90 days post-discharge. Patients were grouped by presence/absence of PAL (ie, diagnosis of post-procedural air leak or post-procedural pneumothorax with associated LOS exceeding 5 days). Outcomes included intensive care unit (ICU) days, total index hospital costs, all-cause 30-, 60-, and 90-day readmission, discharge status, and in-hospital mortality. Generalized linear models quantified associations between PAL and outcomes, accounting for hospital-level clustering, and patient, procedure, and hospital/provider characteristics.

Results

Among the 9727 patients included for study (51.0% female, 83.9% white, mean age 66 years), 12.5% had PAL, which was associated with significant incremental increases in ICU days (0.93 days, p<0.001) and total hospital cost ($11,119, p<0.001). PAL also decreased the likelihood of discharge to home (from 91.3% to 88.1%, p<0.001) and increased the risk of readmission within 30, 60, and 90 days by up to 34.0% (from 9.3% to 12.6%;11.7% to 15.4%;13.6% to 17.2%, respectively), all p<0.01. Absolute risk of mortality was low, but two times higher in patients with PAL versus those without PAL (2.4% vs 1.1%, p=0.001).

Conclusion

This analysis demonstrates that despite the prophylactic use of lung sealants, PAL continues to put a burden on the healthcare system, highlighting an unmet need for improved sealant technology.

Short-Term Outcomes of Fiberoptic Bronchoscopy-guided Resection and Anastomosis Control in Thoracic Surgery

BACKGROUND

In thoracic surgery practice, bronchial closure and anastomosis are relatively easy in technical terms; however, it is also the procedure that is most open to the development of complications with high morbidity. This study aimed to investigate the effect of simultaneous evaluation of bronchial closure under fiberoptic bronchoscopy guidance during lung resection on the development of complications.

MATERIALS AND METHODS

Patients aged over 18 years who underwent elective lung resection in our clinic between 2017 and 2021 were included in the study. Postoperative complications were recorded and statistically analyzed.

RESULTS

The mean age of the patients was 61.4±10.4 years, and 267 patients were male (75.4%) and 87 (24.6%) were female. Thoracotomy was performed in 258 (72.9%) patients and lung resection with the video-assisted thoracoscopic surgery technique in 96 (27.1%) patients. During the follow-up, complications were observed during the first 30 days in 78 (22.0%) of the patients and later in 9 (2.5%). Surgical mortality occurred in 11 patients (3.1%), and the rate of readmission to the intensive care unit was 5.6% (n=20).

CONCLUSION

We consider that the control of the resection line with the active use of fiberoptic bronchoscopy during surgery is important for the prevention of the development of bronchial morbidity. Complications in the early period can be reduced by ensuring that the remaining bronchus is not narrowed, there are no residual stump structures that may disrupt the bronchial line, such as cartilage, and bronchial washing is frequently undertaken.

Spontaneous closure of a metachronous brochopleural fistula after omentoplasty for a preceding fistula: Case report

Introduction

A bronchopleural fistula (BPF) after an anatomical lung resection commonly arises singly. We report a case of a metachronous BPF, which developed after omentoplasty of a preceding fistula and subsequently closed without any intervention.

Case presentation

A 77-year-old patient underwent omentoplasty for a brochopleural fistula (BPF) following a right lower lobectomy. A sudden massive air leak developed from the novel BPF approximately 1 cm proximal to the preceding fistula 3 days later. The air leak resolved spontaneously without any intervention one week later. The corresponding fistula was found to be completely closed. Computed tomography showed the omental flap covered both fistulae.

Conclusion

The present case suggested that a metachronous BPF could develop and a harvested omental flap might migrate even after being anchored.

•

A metachronous bronchopleural fistula (BPF) developed 3 days after an omentoplasty for a preceding fistula following a right lower lobectomy.

•

The BPF was closed spontaneously without any subsequent intervention and a computed tomography revealed that the omental flap covered both fistulae.

•

A metachronous BPF could develop and a harvested omental flap might migrate even after being anchored.

Successful Closure of Post-pneumonectomy Bronchopleural Fistula With Suture Repair Reinforced With Porcine Acellular Dermal Matrix (Permacol) and Hydrogel Sealant (Progel): A Case Report

Bronchopleural fistula (BPF) is a feared and potentially life-threatening complication of pneumonectomy. Clinical features such as a productive cough and subcutaneous emphysema raise suspicion of BPF with CT imaging and bronchoscopy providing a definitive diagnosis. In light of the significant morbidity and mortality associated with the condition, a significant proportion of cases necessitate surgical repair of the bronchial stump.

Currently, there is no consensus on optimal surgical strategy. Traditionally, various vascularised tissue flaps, including pericardial fat pad, omentum, and muscle, have been used to buttress the repaired stump, with varying success rates. In light of this, novel approaches have been devised with the aim of achieving more consistent surgical outcomes. In this case report, we describe a novel approach to reinforcing the suture repair using porcine dermal collagen matrix (Permacol, Medtronic, Minneapolis, MN) and hydrogel sealant (Progel, BD, Franklin Lakes, NJ) to achieve successful closure of a BPF in an adult male patient following pneumonectomy for squamous cell carcinoma.

The use of porcine dermal collagen matrix covered with hydrogel sealant is a viable alternative to traditional BPF closure strategies and can achieve good patient outcomes. This technique has several benefits including cost-effectiveness and sparing of native tissues, and it is technically straightforward. Further studies are required to compare the clinical outcomes of this and other novel techniques with traditional BPF closure approaches.

Fabrication of vitamin K3-carnosine peptide-loaded spun silk fibroin fibers/collagen bi-layered architecture for bronchopleural fistula tissue repair and regeneration applications

Bronchial and pleural injuries with persistent air leak pose a threat in the repair and regeneration of pulmonary diseases. The need to arrive at a highly efficient therapy for closure of bronchopleural fistula (BPF) so as to effectively suppress inflammation, infection and repair the damaged pleural space caused by cancer as well as contractile restoration of bronchopleural scars remain a significant clinical challenge. Herein, we have designed and developed potent bioactive vitamin K3 carnosine peptide (VKC)-loaded spun SF fibroin fibers/collagen bi-layered 3D scaffold for bronchopleural fistula tissue engineering applications. The VKC drug showed excellent cell viability in human bronchial epithelial cells (HBECs), in addition to its pronounced higher cytotoxicity against the A549 lung cancer cell line with an IC₅₀ of 5 μg/mL. Furthermore, VKC displayed a strong affinity with the catalytic site of EGFR (PDB ID: 1M17) and VEGFR2 (PDB ID: 4AGD, 4ASD) receptors in molecular docking studies. Following which the spun SF-VKC (primary layer) and collagen film (top layer) constructed bi-layered CSVKC were structurally elucidated and its morphological, physicochemical and biological characterizations were well examined. The bi-layered scaffold showed superior biocompatibility and cell migration ability in HBECs than other scaffolds. Interestingly, the CSVKC revealed rapid HBECs motility towards scratched regions for fast healing in vitro bronchial tissue engineering. In vivo biocompatibility and angiogenesis studies of the prepared scaffolds were evaluated and the results obtained demonstrated excellent new tissue formation and neovascularization in the bi-layered architecture rather than others. Therefore, our results suggest that the potent antibacterial and anticancer therapeutic agent (VKC)-impregnated silk fibroin fibers/collagen bi-layered 3D biomaterial could be useful in treating cancerous BPF and pulmonary diseases in future.

Risk factors for prolonged air leak and need for intervention following lung resection

OBJECTIVES

Prolonged air leak (PAL; >5 days) following lung resection is associated with postoperative morbidity. We investigated factors associated with PAL and PAL requiring intervention.

METHODS

Retrospective review of all patients undergoing lobectomy, segmentectomy or wedge resection from 2016 to 2019 at our institution. Bronchoplastic reconstructions and lung-volume reduction surgeries were excluded. Incidence and risk factors for PAL and PAL requiring intervention were evaluated.

RESULTS

In total, 2384 patients were included. PAL incidence was 5.4% (129/2384); 22.5% (29/129) required intervention. PAL patients were more commonly male (56.6% vs 39.7%), older (mean age 69 vs 65 years) and underwent lobectomy or thoracotomy (all P < 0.001). Patients with PAL had longer length of stay (9 vs 3 days), more discharge needs and increased odds of complication (all P < 0.050).Twenty-nine patients required intervention (9 chest tubes; 4 percutaneous drains; 16 operations). In 50% of operative interventions, an air leak source was identified; however, the median time from intervention to resolution was 13 days. Patients requiring intervention had increased steroid use, lower diffusion capacity for carbon monoxide and twice the length of stay versus PAL patients (all P < 0.050).On univariable analysis, forced expiratory volume in 1 s (FEV1) <40%, diffusion capacity for carbon monoxide <50%, steroid use and albumin <3 had increased odds of intervention (P < 0.050).

CONCLUSIONS

Age, gender and operative technique were related to PAL development. Patients with worse forced expiratory volume in 1 s or diffusion capacity for carbon monoxide, steroid use or poor nutrition were less likely to heal on their own, indicating a population that could benefit from earlier intervention.

Important Surgical and Clinical End Points in Neoadjuvant Immunotherapy Trials in Resectable NSCLC

Neoadjuvant immunotherapy may improve outcomes in patients with resectable NSCLC and is being evaluated in phase 2 and 3 studies. Nevertheless, preoperative treatment postpones resection; the potential for increased surgical complexity and greater intra- and postoperative morbidity and mortality is an additional consideration. In studies primarily designed to evaluate efficacy, the impact of neoadjuvant immunotherapy on surgery is based on parameters that are poorly defined and reported differently between studies. Defining and reporting common end points among trials would improve understanding and facilitate cross-comparison of different immunotherapy regimens and may facilitate wider adoption of induction therapies by surgeons and oncologists. We propose several surgical end points and related metrics for neoadjuvant immunotherapy in resectable NSCLC. These include the periods from screening to treatment initiation and from last neoadjuvant dose to surgery; reporting of the allowable window for surgery to preclude masking delays caused by induction treatment-related toxicity; complete resection (R0) rate; preoperative downstaging; a standardized list of immune-related adverse events and associated delay to surgery; preoperative attrition; postoperative attrition before adjuvant therapy; and postoperative 30- and 90-day mortality and morbidity rates. Intraoperative end points (blood loss, duration, and type of surgery) and our proposed system of grading complexity based on lymphadenopathy and fibrosis would allow quantitation of technical difficulty and quality of oncologic resection. In conclusion, the standardization, reporting, and prospective inclusion of these end points in study protocols would provide a comparative overview of the impact of different neoadjuvant immunotherapy regimens on surgery and ultimately clinical oncologic outcomes in resectable NSCLC.

Endobronchial closure of the bronchopleural fistula with the ventricular septal defect occluder: a case series

Objectives

The ventricular septal defect (VSD) occluder has been reported to be a novel method for the closure of bronchopleural fistula (BPF). Our study was to confirm the use of VSD occluder in treating BPF after pneumonectomy or lobectomy.

Methods

We performed a single-center, retrospective study of 10 consecutive patients (8 men and 2 women aged 29–70 years) with postoperative BPF receiving the VSD occluder treatment. We used the HeartR™ Membranous VSD occluder (Lifetech Scientific Co., Shenzhen, China) for the closure of BPF through flexible bronchoscopy under general anesthesia. Demographic characteristics, BPF characteristics, and clinical outcomes were collected from patients’ files using the standardized data abstraction forms.

Results

The underlying diseases were lung cancer in 6 patients, pulmonary tuberculosis in 3, and bronchiectasis in 1. Right-sided BPFs occurred in 6 patients, and left-sided BPFs occurred in 4. Five patients were underweight with a body mass index < 18.5 kg/m². The VSD was placed in all 10 patients with a 100% technical success rate and a 70% complete closure rate during follow-up with no complications, on a median follow-up period of 115 days (range 46–975 days). In 1 patient, the VSD occluder was reinstalled with complete closure; in 1 and 2 patients with underweight and chronic empyema, the VSD occluders partially and completely failed with good physical tolerance, respectively.

Conclusions

Our study demonstrated the bronchoscopic closure of BPF after lung resection using the VSD occluder is an off-label but safe and effective method. We prefer to stabilize the BPF by eradicating the underlying diseases and providing nutritional support to those receiving VSD occluder closure treatment.

Complex Oncologic Surgeries and Implications for the Intensive Care Unit Nurse

There are many challenges in caring for the postsurgical patient in the intensive care unit. When the postsurgical patient has an active malignancy, this can make the intensive care unit care more challenging. Nutrition, infection, and the need for postoperative mechanical ventilatory support for the patient with cancer present challenges that may increase the patient's length of stay in the intensive care unit. Critical care nurses must be aware of these challenges as they provide care to this patient population.

The Amplatzer device and pedicle muscle flap transposition for the treatment of bronchopleural fistula with chronic empyema after lobectomy: two case reports

Background

Bronchopleural fistula (BPF) refers to an abnormal channel between the pleural space and the bronchial tree. It is a potentially fatal postoperative complication after pulmonary resection and a complex challenge for thoracic surgeons because many patients with BPF ultimately develop refractory empyema, which is difficult to manage and has a major impact on quality of life and survival. Therefore, an operative intervention combined with conservative and endoscopic therapies may be required to control infection completely, to occlude BPF, and to obliterate the empyema cavity during treatment periods.

Case presentation

Two patients who suffered from BPF complicated with chronic empyema after lobectomy were treated in other hospitals for a long time and did not recover. In our department, we performed staged surgery and creatively combined an Amplatzer Septal Occluder (ASO) device (AGA Medical Corp, Golden Valley, MN, USA) with pedicled muscle flap transposition. First, open-window thoracostomy (OWT), or effective drainage, was performed according to the degree of contamination in the empyema cavity after the local infection was controlled. Second, Amplatzer device implantation and pedicled muscle flap transposition was performed at the same time, which achieved the purpose of obliterating the infection, closing the fistula, and tamponading the residual cavity. The patients recovered without complications and were discharged with short hospitalization stays.

Conclusions

We believe that the union of the Amplatzer device and pedicle muscle flap transposition seems to be a safe and effective treatment for BPF with chronic empyema and can shorten the length of the related hospital stay.