Causes, predictors and consequences of conversion from VATS to open lung lobectomy

Lung Carcinoids: A Comprehensive Review for Clinicians

Lung carcinoids are neuroendocrine tumors, categorized as typical or atypical carcinoids based on their histological appearance. While most of these tumors are slow-growing neoplasms, they still possess malignant potential. Many patients are diagnosed incidentally on chest X-rays or CT scans. Presenting symptoms include cough, hemoptysis, wheezing, dyspnea, and recurrent pneumonia. Endocrine symptoms, such as carcinoid syndrome or ectopic Cushing's syndrome, are rare. Surgery is the primary treatment and should be considered in all patients with localized disease, even when thoracic lymph node metastases are present. Patients with distant metastases may be treated with somatostatin analogues, chemotherapy, preferably temozolomide-based, mTOR inhibitors, or peptide receptor radionuclide therapy (PRRT) with 177Lu-DOTATATE. Most patients have an excellent prognosis. Poor prognostic factors include atypical histology and lymph node metastases at diagnosis. Long-term follow-up is mandatory since metastases may occur late.

Is the Epithor conversion score reliable in robotic-assisted surgery anatomical lung resection?

OBJECTIVES

Despite an improvement in surgical abilities, the need for an intraoperative switch from a minimally invasive procedure towards an open surgery (conversion) still remains. To anticipate this risk, the Epithor conversion score (ECS) has been described for video-assisted thoracoscopic surgery (VATS). Our objective was to determine if this score, developed for VATS, is applicable in robotic-assisted thoracoscopic surgery (RATS).

METHODS

This was a retrospective monocentric study from January 2006 to June 2022, and data were obtained from the EPITHOR database. Patients included were those who underwent anatomic lung resection either by VATS or RATS. The ECS was calculated for all patients studied. Discrimination and calibration of the test were measured by the area under the curve and Hosmer-Lemeshow test.

RESULTS

A total of 1685 were included. There were 183/1299 conversions in the VATS group (14.1%) and 27/386 conversions in the RATS group (6.9%). Patients in the RATS group had fewer antiplatelet therapy and peripheral arterial disease. There were more segmentectomies in the VATS group. As for test discrimination, the area under the curve was 0.66 [0.56-0.78] in the RATS group and 0.64 [0.60-0.69] in the VATS group. Regarding the calibration, the Hosmer-Lemeshow test was not significant for both groups but more positive (better calibrated) for the VATS group (P = 0.12) compared to the RATS group (P = 0.08).

CONCLUSIONS

The ECS seems applicable for patients operated with RATS, with a correct discrimination but a lower calibration performance for patients operated with VATS. A new score could be developed to specifically anticipate conversion in patients operated on by RATS.

The Impact of Surgical Experience in VATS Lobectomy on Conversion and Patient Quality of Life: Results from a Comprehensive National Video-Assisted Thoracic Surgical Database

OBJECTIVES

Although unexpected conversion during Video-Assisted Thoracic Surgery (VATS) lobectomy is up to 23%, the effects on postoperative outcomes remain debatable. This retrospective study aimed: (i) to identify potential preoperative risk factors of VATS conversion to standard thoracotomy; (ii) to assess the impact of surgical experience in VATS lobectomy on conversion rate and patient health-related quality of life.

METHODS

We extracted detailed information on VATS lobectomy procedures performed consecutively (2014-2019). Predictors of conversion were assessed with univariable and multivariable logistic regressions. To assess the impact of VATS lobectomy experience, observations were divided according to surgeons' experiences with VATS lobectomy. The impact of VATS lobectomy experience on conversion and occurrence of postoperative complications was evaluated using logistic regressions. The impact of VATS lobectomy experience on EuroQoL-5D (EQ-5D) scores at discharge was assessed using Tobit regressions.

RESULTS

A total of 11,772 patients underwent planned VATS for non-small-cell lung cancer (NSCLC), with 1074 (9.1%) requiring conversion to thoracotomy. The independent predictors at multivariable analysis were: FEV1% (OR = 0.99; 95% CI: 0.98-0.99, p = 0.007), clinical nodal involvement (OR = 1.43; 95% CI: 1.08-1.90, p = 0.014). Experienced surgeons performed 4079 (34.7%) interventions. Experience in VATS lobectomy did not show a relevant impact on the risk of open surgery conversion (p = 0.13) and postoperative complications (p = 0.10), whereas it showed a significant positive impact (p = 0.012) on EQ-5D scores at discharge.

CONCLUSIONS

Clinical nodal involvement was confirmed as the most critical predictor of conversion. Greater experience in VATS lobectomy did not decrease conversion rate and postoperative complications but was positively associated with postoperative patient quality of life.

Factors Associated with Early Discharge after Thoracoscopic Lobectomy: Results from the Italian VATS Group Registry

Objective. There are limited data for estimating the risk of early discharge following thoracoscopic lobectomy. The objective was to identify the factors associated with a short length of stay and verify the influence of these variables in uncomplicated patients. Methods. We reviewed all lobectomies reported to the Italian VATS Group between January 2014 and January 2020. Patients and perioperative characteristics were divided into two subgroups based on whether or not they met the target duration of stay (≤ or >4 days). The association between preoperative and intraoperative variables and postoperative length of stay (LOS) ≤4 days was assessed using a stepwise multivariable logistic regression analysis to identify factors independently associated with LOS and factors related to LOS in uncomplicated cases. Results. Among 10,240 cases who underwent thoracoscopic lobectomy, 37.6% had a hospital stay ≤4 days. Variables associated with LOS included age, hospital surgical volume, Diffusion Lung CO % (81 [69−94] vs. 85 [73−98]), Forced Expiratory Volume (FEV1) % (92 [79−106] vs. 96 [82−109]), operative time (180 [141−230] vs. 160 [125−195]), uniportal approach (571 [9%] vs. 713 [18.5%]), bioenergy sealer use, and pain control through intercostal block or opioids (p < 0.001). Except for FEV1 and blood loss, all other factors emerged significantly associated with LOS when the analysis was limited to uncomplicated patients. Conclusions. Demographic, clinical, and surgical variables are associated with early discharge after thoracoscopic lobectomy. This study indicates that these characteristics are associated with early discharge. This result can be used in association with clinical judgment to identify appropriate patients for fast-track protocols.

Factors Associated with Early Discharge after Thoracoscopic Lobectomy: Results from the Italian VATS Group Registry

Objective. There are limited data for estimating the risk of early discharge following thoracoscopic lobectomy. The objective was to identify the factors associated with a short length of stay and verify the influence of these variables in uncomplicated patients. Methods. We reviewed all lobectomies reported to the Italian VATS Group between January 2014 and January 2020. Patients and perioperative characteristics were divided into two subgroups based on whether or not they met the target duration of stay (≤ or >4 days). The association between preoperative and intraoperative variables and postoperative length of stay (LOS) ≤4 days was assessed using a stepwise multivariable logistic regression analysis to identify factors independently associated with LOS and factors related to LOS in uncomplicated cases. Results. Among 10,240 cases who underwent thoracoscopic lobectomy, 37.6% had a hospital stay ≤4 days. Variables associated with LOS included age, hospital surgical volume, Diffusion Lung CO % (81 [69–94] vs. 85 [73–98]), Forced Expiratory Volume (FEV1) % (92 [79–106] vs. 96 [82–109]), operative time (180 [141–230] vs. 160 [125–195]), uniportal approach (571 [9%] vs. 713 [18.5%]), bioenergy sealer use, and pain control through intercostal block or opioids (p < 0.001). Except for FEV1 and blood loss, all other factors emerged significantly associated with LOS when the analysis was limited to uncomplicated patients. Conclusions. Demographic, clinical, and surgical variables are associated with early discharge after thoracoscopic lobectomy. This study indicates that these characteristics are associated with early discharge. This result can be used in association with clinical judgment to identify appropriate patients for fast-track protocols.

External validation of risk prediction scores in patients undergoing anatomic video-assisted thoracoscopic resection

Background

EuroLung Risk scores were established to predict postoperative morbidity and mortality in patients undergoing anatomic lung resections. We aimed to perform an external validation of the EuroLung scores, which were calculated from data of the European Society of Thoracic Surgeons database, in our video-assisted thoracoscopic surgery cohort.

Methods

All available EuroLung scores were calculated for 718 patients scheduled for anatomic video-assisted thoracoscopic surgery resections between 2009 and 2019. Morbidity and mortality according to the definitions of the EuroLung scores were analyzed in a prospectively maintained database.

Results

Overall observed complication rate was 10.45%. Scores showed weak individual correlation (η = 0.155–0.174). The EuroLung1 app score showed the biggest area under the receiver operative characteristic (ROC) curve with 0.660. Binary logistic regression analysis showed that predicted postoperative forced expiratory volume in 1 s was associated with increased complications in both EuroLung1 and parsimonious EuroLung1 scores. Thirty-day mortality was 0.7% (predicted 1.10–1.40%) and was associated with predicted postoperative forced expiratory volume in 1 s for both EuroLung2 and parsimonious EuroLung2 scores. The EuroLung2 (2016) showed the biggest area under the ROC curve with 0.673. Only a very weak eta correlation between predicted and observed mortality was found for both aggregate EuroLung2, EuroLung2 (2016), EuroLung2 (2019), and parsimonious EuroLung2 (2016) (η = 0.025/0.015/0.011/0.009).

Conclusion

EuroLung scores help to estimate postoperative morbidity. However, even with the highest aggregate EuroLung scores possible only 50% suffer from postoperative morbidity. Although calibration of the scores was acceptable, discrimination between predicted and observed events was poor. Therefore, individual correlation between predicted and observed events is weak. Therefore, EuroLung scores may be best used to compare institutional quality of care to the European Society of Thoracic Surgeons database but should not be used to preclude patients from surgical treatment.

Impact of center volume on conversion to thoracotomy during minimally invasive pulmonary lobectomy

BACKGROUND

Conversion to open is a potentially serious intraoperative event associated with minimally invasive pulmonary lobectomy. However, the impact of institutional expertise on conversion to open has not been studied on a large scale. We used a nationally representative database to evaluate the association between hospital pulmonary lobectomy caseload and rates of conversion to open.

METHODS

All adults who underwent minimally invasive pulmonary lobectomy were identified from the 2017 to 2019 Nationwide Readmissions Database. Annual institutional caseloads of open and minimally invasive lobectomy were independently tabulated. Restricted cubic splines were used to parametrize the relationship between conversion to open and hospital volumes. Furthermore, multivariable regression was used to examine the association of conversion to open with in-hospital mortality, length of stay, and hospitalization costs.

RESULTS

Of an estimated 52,886 patients who met study criteria, 4.9% required conversion to open. Compared to others, conversion to open patients were slightly younger (66 vs 67 years) and more commonly male (52.2 vs 42.3%, P < .001). After adjustment, male sex (adjusted odds ratio 1.42), history of tobacco use (adjusted odds ratio 1.35), and prior radiation therapy (adjusted odds ratio 1.35, P < .001) were associated with increased odds of conversion to open. Increasing minimally invasive lobectomy volume was linked to lower risk-adjusted rates of conversion to open, whereas greater open lobectomy caseload was associated with higher rates. Despite no impact on mortality (adjusted odds ratio 1.11, P = .73), conversion to open was associated with a 1.2-day increment in length of stay and $5,600 in attributable costs.

CONCLUSION

The present study found institutional minimally invasive pulmonary lobectomy caseload to be associated with decreased rates of conversion to thoracotomy, emphasizing the relevance of minimally invasive training among surgeons and perioperative staff.

Did conversion to thoracotomy during thoracoscopic lobectomy increase post-operative complications and prejudice survival? Results of best evidence topic analysis

The potential complications related to unplanned conversion to thoracotomy remains a major concern in thoracoscopic lobectomy and may limit the wide adoption of this strategy. We reviewed the literature from 1990 until February 2022, analyzing all papers comparing successful thoracoscopic lobectomy versus converted thoracoscopic lobectomy and/or upfront thoracotomy lobectomy to establish whether unplanned conversion negatively affected outcomes. Thirteen studies provided the most applicable evidence to evaluate this issue. Conversion to thoracotomy was reported to occur in up to 23% of cases (range, 5%-16%). Vascular injury, calcified lymph nodes, and dense adhesions were the most common reasons for conversion. Converted thoracoscopic lobectomy compared to successful thoracoscopic lobectomy was associated with longer operative time and hospital stay in all studies, with higher postoperative complication rates in seven studies, and with higher perioperative mortality rates in four studies. No significant differences were found between converted thoracoscopic lobectomy and upfront thoracotomy lobectomy. Five studies evaluated long-term survival, and in all papers conversion did not prejudice survival. Surgeons should not fear unplanned conversion during thoracoscopic lobectomy, but to avoid unexpected conversion that may negatively impact surgical outcome, a careful selection of patients is recommended-especially for frail patients.

Intraoperative conversion from video-assisted thoracoscopic lobectomy to thoracotomy for non-small-cell lung cancer: Does it have an impact on long-term survival?

A best evidence topic in thoracic surgery was written according to a structured protocol. The question addressed was whether intraoperative conversions to thoracotomy have an impact on long-term survival for patients with non-small-cell lung cancer who underwent video-assisted thoracoscopic lobectomy initially. A total of 461 papers were found using the reported search, of which 6 retrospective cohort studies represented the best evidence to answer the clinical question. The authors, date of publication, journal, country of the authors, patient group, study type, relevant outcomes and results of these papers were tabulated. Five cohort studies clarified that conversion did not compromise long-term survival, whereas 1 cohort study reported worse long-term outcomes after conversion to thoracotomy. However, the limited samples, different characteristics between groups and selection bias due to inherent design made it difficult to make a conclusion. Based on the current evidence, we concluded that intraoperative conversion from video-assisted thoracoscopic surgery (VATS) to thoracotomy for non-small-cell lung cancer might not impact long-term survival compared to a successful VATS lobectomy. In-hospital mortality might not be prejudiced, whereas longer hospitalizations were observed. However, whether conversion would adversely affect postoperative complication rates remained unclear because of the conflicting results. Moreover, 3 studies reported no statistical differences in short- and long-term survival between emergency and non-emergency conversions. Therefore, we suggest that thoracic surgeons should not hesitate to convert VATS into thoracotomy in the case of blood vessel injury or difficult hilum.

Prediction of preoperative intrathoracic adhesions for ipsilateral reoperations: sliding lung sign

Introduction

Video-assisted thoracic surgery (VATS) for ipsilateral reoperations is controversial, because after the first surgical intervention, pleural adhesions occur frequently in the thoracic cavity and/or chest wall. This study assessed the usefulness of preoperative ultrasonography to reduce the incidence of lung injury at the time of the initial port insertion during secondary ipsilateral VATS.

Materials and methods

This was a retrospective, single-center study. Nine patients who underwent thoracic surgery at Vanvitelli Hospitalfrom September 2019 to February 2022, were scheduled for a second VATS surgeryon ipsilateral lung, because of inconclusive intraoperative histologic examination. All nine patients underwent preoperative ultrasonography to assess the possible presence of pleural adhesions. We evaluated the lung sliding, since the presence of pleural adhesions does not permit to appreciate it.

Statistical analysis

Hard severe adhesions were observed in all nine patients without sliding lung sign (specificity 100%). In this series, the sensitivity, PPV, and NPV of the sliding lung sign were 93%, 100% and 94% respectively.

Results

The presence of the lung respiratory changes can be evaluated as the “sliding lung sign” by chest ultrasonography; we believe that the sliding lung sign might also predict intrathoracic adhesion.

Conclusions

Preoperative detection of pleural adhesions using transthoracic ultrasonography was useful for ipsilateral secondary pulmonary resection patients undergoing VATS. Using preoperative ultrasonography can improve the safety and feasibility of placing the initial port in VATS.

Conversion to Thoracotomy During Thoracoscopic versus Robotic Lobectomy: Predictors and Outcomes

BACKGROUND

Conversion to thoracotomy during minimally invasive lobectomy for lung cancer is occasionally necessary. Differences between video-assisted thoracoscopic (VATS) and robotic-assisted (RATS) lobectomy conversion have not been described.

METHODS

We queried The Society of Thoracic Surgeons (STS) General Thoracic Surgery Database (GTSD) from January 1, 2015 to December 31, 2018. Patients with prior thoracic operations and metastatic disease were excluded. Univariable comparisons with Chi-squared and Kruskal-Wallis tests and multivariable logistic regression modeling were performed.

RESULTS

There were 27,695 minimally invasive lobectomies from 269 centers. Conversion to thoracotomy occurred in 11.0% of VATS and 6.0% of RATS (p<0.001). Conversion was associated with increased mortality (p<0.001), major complications (p<0.001), and intra- (p<0.001) and post-operative (p<0.001) blood transfusions. Conversion from RATS occurred emergently (p<0.001) and for vascular injury (p<0.001) more frequently than from VATS, but there was no difference in overall major complications or mortality. Mortality following conversion was 3.1% for RATS and 2.2% for VATS (p=0.24). Clinical cancer stage II or III (p<0.001), preoperative chemotherapy (p=0.003), FEV1 (p=0.006), BMI (p<0.001), and left-sided resection (p=0.0002) independently predicted VATS conversion. For RATS, clinical stage III (p=0.037), left-sided resection (0.041), and FEV1 (p=0.002) predicted conversion. Lower volume centers had increased rates of conversion (p<0.001) in both groups.

CONCLUSIONS

Conversion from minimally invasive to open lobectomy is associated with increased morbidity and mortality. Conversion occurs more frequently during VATS compared to RATS, although less often emergently, and with similar rates of overall mortality and major complication. Predictors, urgency, and reasons for conversion differ between RATS and VATS lobectomy and may assist in patient selection.

The Evolving Landscape of Lung Cancer Surgical Resection: An Update for Radiologists With Focus on Key Chest CT Findings

Evolution of the multimodality management of early lung cancer, including progress in surgical techniques, has introduced the possibility of resection for lung cancer cases that historically were considered unresectable (e.g., select cases of T4 disease and oligometastatic disease). However, the TNM classification does not uniformly correlate with lung cancer operability and resectability. Radiologic evaluation is therefore critical in identifying patients' suitability to undergo lung cancer resection and in guiding the selection of a surgical approach from among a range of such approaches, including wedge resection, segmentectomy, lobectomy, bilobectomy, and pneumonectomy. The radiologist must understand the available surgical options, along with their advantages and disadvantages, and provide a report that includes critical information on tumor size, location, and extension and anatomic relations that may influence the surgical technique. Preoperative CT findings may also help predict expected postoperative lung function and the associated impact on the postoperative course of the patient. This article reviews the role of chest CT in the preoperative evaluation of lung cancer, focusing on the key CT findings that help direct surgical decision making in the context of an expanding range of patients who may be considered candidates for resection.

Management of Complications During Video-Assisted Thoracic Surgery Lung Resection and Lymph Node Dissection

Intraoperative events can occur during video-assisted thoracoscopic surgery (VATS) lobectomy due to unfavorable surgical anatomy, such as dense adhesions or calcifications around the pulmonary arteries. Troubleshooting intraoperative complications is essential for performing safe and successful VATS pulmonary resection and lymph node dissection. If continuous bleeding occurs or VATS does not proceed despite all measures, conversion to open thoracotomy should not be delayed.

Worse outcomes after conversion of thoracoscopic lobectomy for lung cancer

OBJECTIVES

Conversion of thoracoscopic lobectomy for lung cancer to thoracotomy can adversely affect short-term outcomes, but the impact on long-term outcomes is unknown. This study aimed to identify the risk factors for conversion and to determine the influence of conversion on the outcomes of lung cancer treatment.

METHODS

This retrospective study included 1002 consecutive patients with lung cancer who underwent thoracoscopic lobectomy between 7 June 1999 and 17 July 2018. The groups of patients with and without conversion were compared in terms of possible risk factors and the short- and long-term outcomes. The survival of patients was analysed by the Kaplan-Meier method.

RESULTS

Conversion was done in 105 patients (10.5%). On multivariable logistic regression analysis, the independent risk factors for conversion were pleural adhesions (P < 0.001) and mediastinal lymph node metastases (P < 0.001). Compared with the non-conversion group, the conversion group had longer chest drainage time (4 vs 3 days, P < 0.001) and hospital stay (8 vs 6 days, P < 0.001); more frequent complications (38.1% vs 27.1%, P = 0.018), including red blood cell transfusion (10.5% vs 2%, P < 0.001) and supraventricular arrhythmia (13.3% vs 7.5%, P = 0.037); and lower 5-year survival rate in patients with stage I lung cancer (70% vs 87%, P = 0.014). Conversion did not increase in-hospital mortality.

CONCLUSIONS

Pleural adhesions and lymph node metastases increased the probability of conversion to thoracotomy. Conversion adversely affected the short-term outcomes of thoracoscopic lobectomy. Long-term outcomes of treatment of non-small-cell lung cancer could be worse in patients after conversion, but definitive conclusions cannot be made in this regard because of the absence of control of selection bias.

[Reasons for Conversion to Thoracotomy in 83 Cases during Video-assisted Thoracic Surgery Lobectomy: A Summary of 1,350 Consecutive Operations by A Single Surgical Team]

背景与目的

电视胸腔镜手术（video-assisted thoracic surgery, VATS）为肺癌治疗的主流术式，本研究旨在分析单手术组连续VATS肺叶切除术1, 350例中转开胸83例的中转原因，以期对常态下胸腔镜肺叶切除术中转开胸的规律有更深层次的认识，并更好地把握中转开胸的手术时机。

方法

回顾性分析2009年9月21日-2020年6月1日河北医科大学第四医院胸外科单手术组连续行胸腔镜肺叶切除术的1, 350例患者资料。其中男性773例，女性577例，年龄8岁-87岁，中位年龄61.3岁。全组良性疾病83例，肺转移瘤38例，原发性肺癌1, 229例，其中Ⅰ期: 676例，Ⅱ期: 323例，Ⅲa期: 230例。全组行左肺上叶切除术301例（22.30%），左肺下叶切除术231例（17.11%），右肺上叶切除术378例（28.00%），右肺中叶切除术119例（8.81%），右肺下叶切除术262例（19.41%），右肺中上叶切除术16例（1.19%），右肺中下叶切除术43例（3.19%）。

结果

单手术组连续1, 350例胸腔镜肺叶切除术患者中有83例（6.15%）因不同原因中转开胸。良性病变的中转开胸率高于恶性肿瘤（P < 0.05）；病理分期为Ⅲa期的中转开胸率明显高于Ⅰ期、Ⅱ期患者（P < 0.05）。联合肺叶切除术的中转开胸率明显高于单肺叶切除术（P=0.001）；左肺上叶切除术的中转开胸率显著高于其他单肺叶切除术（P < 0.001）；右肺中叶切除术的中转开胸率低于其他单肺叶切除术（P=0.049）。中转开胸主要原因为血管损伤（38.55%）、淋巴结干扰（26.51%）、胸腔致密粘连（16.87%）；中转开胸组总体手术时间为（236.99±66.50）min，总体失血量（395.85±306.38）mL。其中淋巴结干扰组患者手术时间（322.50±22.68）min，长于其他原因中转开胸组（P < 0.05）；血管损伤组术中出血量（560.94±361.84）mL，多于其他原因中转开胸组（P < 0.05）；随着时间的推移以及经验的积累，在手术前、中、后期血管损伤例数逐步下降（P < 0.05）。

结论

在胸腔镜手术中，肺部良性病变和较晚期恶性肿瘤有较高的手术难度和中转率。不同肺叶切除术中转开胸率不同，左肺上叶切除术中转率较高，而右肺中叶切除术中转率较低。血管损伤、淋巴结干扰、胸腔致密粘连仍是常态下胸腔镜肺叶切除术中转开胸的主要原因。中转开胸会导致手术时间延长和手术出血量增加。随着手术例数的增加，胸腔镜肺叶切除术中转开胸率有持续下降趋势，其主要原因是肺血管的处理更加成熟。

Postoperative outcomes, lymph node dissection and effects on costs among thoracotomy, video-assisted and robotic-assisted lobectomy for clinical stage I non-small cell lung cancer

BACKGROUND

Thoracotomy, video-assisted thoracoscopic surgery (VATS) and robotic assisted thoracoscopic surgery (RATS)-lobectomy are widely accepted procedures for the surgical treatment of clinical (c)stage I non- small cell lung cancer (NSCLC). In the current literature which procedure gives more benefits is still debated. We present a comparison between these three procedures in term of advantages and postoperative outcomes.

METHODS

A multicentric study about 259 lobectomies from 2013 to 2019: 128 patients underwent TL, 96 VATS and 35 RATS. Different variables were retrospectively analyzed among these three cohorts of patients with diagnosis of cStage I NSCLC.

RESULTS

Rate of major complications comparable in VATS, RATS and TL; Advantages for RATS in minor complications (TL 34.4% vs. VATS 18.75% vs. RATS 8.57%. P=0.0015), postoperative days in Intensive Care Unit, days to chest tube removal, length of postoperative hospitalization (P<0.0001) and number of lymph nodes dissected (P=0.0257). Operating times are shorter in VATS than RATS (P<0.05). Pain (NRS Scale) is comparable.

CONCLUSIONS

TL remains the conventional approach for stage II-IIIA(N2) NSCLC. RATS showed great advantages, but its higher operating time and costs, mostly, today don't justify its adoption as gold standard for the surgical treatment of cStage I NSCLC, instead of VATS.

Estimating the risk of conversion from video-assisted thoracoscopic lung surgery to thoracotomy-a systematic review and meta-analysis

Background

Understanding the risk of conversion from video-assisted thoracic surgery (VATS) to thoracotomy is important when considering patient selection and preoperative surgical risk assessment. This review aims to estimate the rate of intraoperative conversions to thoracotomy, predictive factors, and associated outcomes for VATS anatomic lung resections.

Methods

PubMed/MEDLINE and EMBASE were searched systematically in May of 2020. Observational studies examining conversions of VATS anatomic resections to thoracotomy were included. Conversion rates, causes, risk factors, and post-operative outcomes were reviewed and analyzed in aggregate.

Results

Twenty retrospective studies were reviewed, with a total of 72,932 patients undergoing VATS anatomic lung resection. The median conversion rate was 9.6% (95% CI: 6.6–13.9%). Nine studies reported a total of 114 emergency conversions, with a median incidence rate of 1.3% (95% CI: 0.6–2.8%). The most common reasons for thoracotomy were vascular injury/bleeding, difficulty lymph node dissection, and adhesions, accounting for 27.9%, 26.2% and 19% of conversions, respectively. Risk factors for conversion varied, but frequently included nodal disease, large tumors, and induction therapy. The risk of complications (OR 2.06; 95% CI: 1.77–2.40) and mortality (OR 4.11; 95% CI: 1.59–10.61) were significantly increased following conversions. There was also a significant increase in chest tube duration and length of stay following conversion.

Conclusions

The risk of conversion to thoracotomy may be as high as one in ten patients undergoing VATS anatomic lung resections, but may vary significantly based on patient selection. Although emergent conversions are rare, the need for thoracotomy may significantly increase postoperative morbidity and mortality.

Risk factors of conversion in robotic- and video-assisted pulmonary surgery for non-small cell lung cancer

BACKGROUND

This study aimed to investigate risk factors of conversion to thoracotomy for patients with non-small cell lung cancer (NSCLC) underwent robotic- (RATS) or video-assisted thoracoscopic surgery (VATS).

METHODS

A retrospective review was conducted to included consecutive participants from January 2016 to December 2018. Three groups [mini-invasive, conversion, and up-front open thoracotomy (OT) groups] and two series of comparison (conversion versus mini-invasive, and conversion versus OT) were generated. Propensity score-matched analysis (1:1) was conducted to verify outcomes of complications and perioperative factors. Multivariate binary logistic regression analysis was used to identify potential risk factors of conversion.

RESULTS

1177 patients (912 in mini-invasive group, 180 in conversion group, and 85 in OT group) were included. The overall conversion rate was 16.5%. Robotic approach resulted in dramatically lower conversion rate compared to VATS (2.4% vs 25.1%, p < 0.001). After propensity adjustment, no significant difference of complication rates was identified when comparing conversion group with mini-invasive and OT groups. Multivariate regression analyses shown that robotic approach (odd ratio (OR) = 0.037, 95% confidential interval (CI) 0.016-0.087), tumor size < 5 cm (OR = 0.274, 95% CI 0.152-0.493), no chief symptom(OR = 0.311, 95% CI 0.178-0.545), body mass index < 25 kg/m² (OR = 0.537, 95% CI 0.343-0.842), and lobectomy (OR = 0.079, 95% CI 0.017-0.370) were independent protectors of conversion.

CONCLUSIONS

Seven demographic factors might be recognized as independent predictors of conversion. For patients with highly risk of conversion, robotic approach is recommended to perform mini-invasive pulmonary surgery over VATS.

Troubleshooting in thoracoscopic anatomical lung resection for lung cancer

Video-assisted thoracoscopic surgery (VATS) anatomical lung resection (ALR) has been gaining popularity in the treatment of lung cancer in line with remarkable advances in both equipment and technique. The development and refinement of its technique have allowed thoracic surgeons to perform a wide variety of challenging and complex procedures in a minimally invasive fashion. Careful and meticulous preparation may shift in the future with the increasing sophistication and capabilities of VATS ALR. Moreover, constant awareness and a structured plan of the procedure are imperative to reducing or preventing complications. Intraoperative major complications during VATS ALR are infrequent, but can have catastrophic consequences. The decision to continue with VATS should take into consideration the surgeon's skill level and ease with the approach and the relative potential benefit against the risk to the patient. We conducted this study to investigate the possible problems during VATS ALR and identify how to solve them based on the previous literature and our institutional data sampling.

Risk factors and cancer recurrence associated with postoperative complications after thoracoscopic lobectomy for clinical stage I non-small cell lung cancer

Background

Minimally invasive thoracoscopic lobectomy is the recommended surgery for clinical stage I non‐small cell lung cancer (NSCLC). The purpose of this study was to identify the risk factors, including sarcopenia, for postoperative complications in patients undergoing a complete single‐lobe thoracoscopic lobectomy for clinical stage I NSCLC, as well as the impact of complications on disease‐free survival.

Methods

We retrospectively investigated 173 patients with pathologically‐diagnosed NSCLC who underwent curative thoracoscopic lobectomies between April 2013 and March 2018. Sarcopenia was assessed using the psoas muscle index calculated from preoperative computed tomography images at the third lumbar vertebral level.

Results

Complications developed in 38 (22%) patients, including 21 with prolonged air leak. In univariate analysis, the significant risk factors for complications were advanced age, male sex, higher Charlson Comorbidity Index (CCI) score, lower cholinesterase, lower albumin, higher creatinine level, pleural adhesion, operative time ≥ five hours, nonadenocarcinoma cancer, and larger tumor size. Multivariate analysis showed that age ≥ 75 years (P = 0.002) and pleural adhesion (P = 0.026) were significant independent risk factors for complications. Compared with the patient group without complications, postoperative complications were independently associated with shorter disease‐free survival (P = 0.01).

Conclusions

Advanced age and pleural adhesion were independent risk factors for complications after complete single‐lobe thoracoscopic lobectomies for clinical stage I NSCLC, and postoperative complications were statistically associated with poor prognosis. Surgical teams should ensure an experienced surgeon leads the operation for patients at higher risk to avoid prolonged postoperative hospitalization and a possible poor prognosis.

Minimally Invasive Lobectomy Modality and Other Predictors of Conversion to Thoracotomy

OBJECTIVE

Minimally invasive approaches to lobectomy are increasing. Rates of conversion to thoracotomy are well reported but risk factors are poorly understood. This study aimed to determine the impact of surgical modality (video-assisted thoracoscopic surgery [VATS] and robotic) on conversion as well as to identify other risk factors for conversion.

METHODS

The National Cancer Database (NCDB) was used to identify patients who underwent minimally invasive lobectomy between 2010 and 2015. Patient characteristics were compared between VATS and robotic approaches using chi-squared tests and t-tests. Logistic regression models were used to control for covariates and identify factors associated with all minimally invasive conversion, VATS conversion, and robotic conversion. Propensity score matching was used to compare conversion rates of VATS and robotic lobectomy.

RESULTS

The study included 51,723 patients with lung cancer who underwent minimally invasive lobectomy (VATS or robotic). Conversion was identified in 7,109 (7.3%) operations. The odds of VATS conversions were nearly twice that of robotic conversions (OR 1.94 P < 0.0001). After controlling for VATS and robotic patient imbalances with propensity score matching, there was a 5% difference in conversion rates (14% vs. 9%, P < 0.0001). Other predictors of minimally invasive conversion included community hospitals, tumor size 4.5 cm or greater, and an increasing Charlson comorbidity index (P < 0.03 for all).

CONCLUSIONS

VATS is associated with nearly twice the odds of conversion as robotic lobectomy. Identifying specific risk factors for both VATS and robotic conversions may aid in appropriate modality selection and reduction of conversions.

Analysis of conversion to thoracotomy during thoracoscopic lung resection

Background

Video-assisted thoracoscopic surgery has been widely adopted. However, conversion to open thoracotomy is still necessary when intraoperative complications are encountered.

Methods

Between January 2009 and December 2014, 1566 patients underwent anatomical lung resection for lung cancer using video-assisted thoracoscopic surgery at our institution. Among these patients, 39 required conversion to open thoracotomy. We retrospectively examined the current status of conversion to thoracotomy during video-assisted thoracoscopic surgery in a single city hospital. Data were compared with those of 89 patients undergoing a scheduled thoracotomy.

Results

The main reason for conversion was the need for angioplasty for pulmonary artery invasion by silicotic lymph nodes (12 cases), and metastatic lymph nodes or tumors (9 cases). Univariate analysis demonstrated that the risk factors for conversion were male sex, smoking habit, induction therapy, large tumor size, and advanced stage. Multivariate analysis showed that advanced clinical stage was the only significant predictor of intraoperative conversion. Compared to the video-assisted thoracoscopic surgery group, mortality and morbidity in the conversion group were significantly higher, but there was no significant difference in mortality or morbidity between the conversion and scheduled thoracotomy groups. The conversion group showed a significantly higher rate of lethal acute exacerbation of interstitial pneumonitis than the video-assisted thoracoscopic surgery group.

Conclusion

The main reason for conversion was angioplasty, and advanced clinical stage was a significant predictor of intraoperative conversion. Conversion was safely performed but postoperative complications, although similar in frequency to scheduled thoracotomy cases, were more frequent than those in thoracoscopic surgery cases.

Management of calcified hilar lymph nodes during thoracoscopic lobectomies: avoidance of conversions

Background

Our objective in this paper is to introduce a new method for handling calcified hilar lymph nodes during lobectomies by video-assisted thoracoscopy that effectively avoids arterial injury and possible conversions.

Methods

The 12 cases in this study were initially evaluated as eligible and were subsequently scheduled for thoracoscopic lobectomies. However, calcification of the hilar lymph nodes was discovered during the operations, and its presence hampered the conventional process of pulmonary artery dissection. To avoid vessel injuries and subsequent massive bleeding, we developed two techniques specific to the position and exposure of the target vessels and nodes. The space between the bronchus and lymph nodes is exposed by sharp dissection ("scissor first") either before or after suturing the artery. These techniques are illustrated in detail.

Results

Seven male and five female patients participated in this study, with an average age of 72.5 years. We performed five right-upper lobectomies, three right-middle lobectomies, three right-lower lobectomies, and a left-lower lobectomy. Using this new technique, no conversions to thoracotomy occurred. The average operation time was 125 minutes, the mean blood loss was 275 mL, and no intra-operative massive bleeding occurred. Two patients experienced minor complications, one pulmonary infection and another postoperative subcutaneous emphysema.

Conclusions

The proposed "scissor first" technique provides an effective solution for the thoracoscopic management of calcified hilar lymph nodes, and is a safe and effective method for avoiding arterial injury and conversion.

Conversion due to vascular injury during video-assisted thoracic surgery lobectomy: A multicentre retrospective analysis from the Italian video-assisted thoracic surgery group registry

OBJECTIVES

Vascular injuries are among the most severe causes of unplanned conversion during VATS lobectomies. The study aimed to analyse the incidence of vascular injuries and their risk factors during VATS lobectomy.

METHODS

The Italian VATS lobectomy Registry was used to collect data from 66 Thoracic Surgery Units. From 2013 to October 2016 (out of more than 3,700 patients enrolled) only information from Units with an enrollment >100 VATS lobectomies were retrospectively analysed. Logistic regression analysis was performed on selected variables of the univariate analysis.

RESULTS

Ten institutions contributed a total of 1,679 patients. Vascular injuries leading to conversion occurred in 44 (2.6%) patients. Years of experiences were inversely related to the risk of vascular injuries. Univariate analysis showed age, gender, surgical activity, Charlson Index Score and number of resected lymph nodes like significantly associated variables. Multivariate analysis revealed that number of resected lymph nodes, VATS experience ratio (number of VATS lobectomies/total lobectomies performed in the same year at same centre), and surgical activity of the centre were significantly associated with the risk of conversion. Unplanned thoracotomy was correlated with postoperative morbidity.

CONCLUSION

Vascular injuries in VATS lobectomies represented a rare complication which could directly affect the postoperative outcomes. The predictive factors for conversion were multifactorial and depended on characteristics of centres and surgeons' seniority. Minimally invasive VATS lobectomy approaches did not influence the risk of vascular damages.

VATS Partial Pleurectomy Versus VATS Pleural Abrasion: Significant Reduction in Pneumothorax Recurrence Rates After Pleurectomy

Introduction

Surgical treatment of primary spontaneous pneumothorax (PSP) usually consists of bullectomy and any form of pleurodesis to reduce risk of disease recurrence. Whether pleurectomy is superior to pleural abrasion is still a matter of debate with recurrence rates especially high when performed with a video-assisted thoracoscopic (VATS) approach. Aim of this study was to compare the efficacy of the two methods in prevention of recurrence of pneumothorax in a minimally invasive setting.

Materials and methods

Between 01/2005 and 12/2015, 107 patients younger than 40 years with PSP underwent VATS bullectomy and either partial pleurectomy or pleural abrasion. Medical records of patients were reviewed retrospectively.

Results

Pleural abrasion was performed in 34/107 patients, 73/107 patients underwent partial pleurectomy. There were no statistically significant differences in age, sex, body mass index or smoking history at time of surgery. There was no significant difference in major postoperative complications (p = 0.3022). Nine (8.4%) patients had a recurrence of pneumothorax during follow-up. Incidence of recurrence in those undergoing pleural abrasion was significantly higher than those undergoing apical pleurectomy (8/34 vs. 1/73, p < 0.001). Surgical technique was the only factor associated with a recurrence of PSP after surgical intervention.

Discussion

In our analysis, a VATS partial pleurectomy proved to be effective for prevention of recurrent PSP. Recurrence rates were low despite a minimally invasive approach and significantly lower than in the pleural abrasion group. According to these findings, VATS pleurectomy might be considered as the primary choice for surgical pleurodesis in patients with PSP.

Management of intra-operative major bleeding during single-port video-assisted thoracoscopic anatomic resection: two-center experience

BACKGROUND

Our objective is to report on two centers' experience of intra-operative management of major vascular injury during single-port video-assisted thoracoscopic (SPVATS) anatomic resections, including bleeding control techniques, incidence, results, and risk factor analysis.

METHODS

Consecutive patients (n = 442) who received SPVATS anatomic lung resections in two centers were enrolled. The different clinical parameters studied included age, previous thoracic surgery, obesity (BMI > 30), tumor location, neoadjuvant therapy, and pleural symphysis. In addition, peri-operative outcomes were compared between the groups, with or without vessel injury.

RESULTS

There were no intra-operative deaths in our study. Overall major bleeding incidence was 4.5%, whereby 70% of major bleeding episodes could be managed with SPVATS techniques. In order to determine risk factors possibly related to intra-operative bleeding, we used case control matching to homogenize our study population. After case control matching, pleural symphysis was significantly related in the univariate (p = 0.005, Odds ratio 4.415, 95% CI 1.424-13.685) and multivariate analysis (p = 0.006, Odds ratio 4.926, 95% CI 1.577-15.384). Operative time (p < 0.001), blood loss (p < 0.001), and post-operative hospital stay (p = 0.012) were longer in patients with major vascular injury. There were no differences in 30-day mortality and 90-day morbidity.

CONCLUSIONS

In summary, major intra-operative bleeding episodes during SPVATS anatomic lung resections are acceptable and most such bleeding episodes can be safely managed with SPVATS techniques.

Video-assisted thoracic surgery is an optimal alternative to conventional thoracotomy for reoperations for ipsilateral pulmonary lesions

BACKGROUND

Ipsilateral pulmonary reoperation is empirically considered a contraindication of video-assisted thoracic surgery (VATS) because of intrapleural adhesion and the destruction of anatomical structures caused by previous surgery. The purpose of this study was to present our experience of the use of VATS for ipsilateral reoperations.

METHODS

The medical records of patients who underwent VATS reoperation or re-thoracotomy between January 2006 and March 2017 were retrospectively reviewed. Data were compared to assess the feasibility and safety of VATS for ipsilateral reoperations.

RESULTS

The study enrolled 64 patients, including 36 patients who underwent attempted ipsilateral VATS reoperations (VATS group) and 28 who underwent conventional re-thoracotomy as a control with clinicopathological characteristics similar to those in the VATS group. Intrapleural severe adhesions were detected in 28 (77.8%) and 22 (78.6%) patients in the VATS and re-thoracotomy groups, respectively (P = 0.906), and their dissection required a longer period in the VATS group (P = 0.014). VATS reoperations were converted to re-thoracotomy or video-assisted mini re-thoracotomy in three patients because of bleeding or difficulty in dissecting hilar structures. There were no significant differences in resection methods, time to reoperation, intraoperative blood loss, or drainage time between the two groups. However, patients in the VATS group had a shorter hospital stay (P < 0.01) and fewer complications (P = 0.042).

CONCLUSION

VATS is an optimal alternative to re-thoracotomy for ipsilateral pulmonary lesions, regardless of intrapleural adhesions and the destruction of anatomical structures caused by former operations in selected patients.

Balloon-Based Organ Retractor With Increased Safety and Reduced Invasiveness During Video-Assisted Thoracoscopic Surgery

OBJECTIVES

In recent years, video-assisted thoracoscopic surgery (VATS) has increasingly become the preferred technique for thoracic surgery. However, the inherent characteristics of the lungs as large, soft, slippery, and delicate creates difficulties for pulmonary surgery. In this article, we outline the development and assessment of a balloon-based organ retractor for VATS via collaboration between medical and engineering personnel.

METHODS

A dry lab trial and accompanying questionnaire assessment were performed by a group of thoracic surgeons. Objective pressure measurements were obtained, and animal experiment on pigs was performed.

RESULTS

In the dry lab trial, use of the developed organ retractor required significantly less time and resulted in fewer difficulties than using a Cherry Dissector. The measured pressure per mm² of the developed retractor was clearly lower than that for the Cherry Dissector. The questionnaire completed by the surgeons following the dry lab and animal experiments showed that most of the surgeons (7 surgeons out of 9) were satisfied with the quality of the balloon-based retractor based on a score of 3.13 ± 0.28 (mean ± standard deviation) out of 4.0. During the animal experiment, the balloon-based retractor provided stable and clear viewing with minimal need for adjustment.

CONCLUSION

This balloon-based retractor could contribute to increased safety and less-invasive VATS.

Intraoperative complications during VATS lobectomies from conversion to minimally-invasive "trouble-shooting"

The aim of this study was to explore intraoperative complications during video-assisted thoracoscopic surgery (VATS) lobectomy. Vascular and bronchial injuries, after a robust learning curve, can be sometimes successfully managed by VATS. During a VATS lobectomy, it is necessary: to be prepared in potentially dangerous situations; to think about strategies to handle intraoperative complications and to share these strategies with your own staff. Herein we present some videos showing cases where vascular injuries led to conversion and others where a minimally-invasive trouble shooting of intraoperative complications was achieved.

Presence of pleural adhesions can predict conversion to thoracotomy and postoperative surgical complications in patients undergoing video-assisted thoracoscopic lung cancer lobectomy

Background

The purpose of our cohort study was to investigate the effects of pleural adhesions on perioperative outcomes in patients undergoing video-assisted thoracoscopic surgery (VATS) lobectomy for non-small-cell lung cancer (NSCLC).

Methods

We performed a single-center retrospective analysis on the prospectively-maintained dataset at our unit from February 2014 to November 2015. Patients were divided into two groups (Group A: presence of pleural adhesions; Group B: absence of pleural adhesions) according to our grading system of pleural adhesions when entering the chest cavity. Demographic differences in perioperative outcomes between these two groups were initially estimated. A multivariate logistic-regression analysis was then performed to confirm the predictive value of the presence of pleural adhesions.

Results

A total of 593 NSCLC patients undergoing VATS lobectomy were enrolled. The conversion and postoperative morbidity rates were 3.2% and 29.2%, respectively. There were 154 patients with pleural adhesions (Group A) and 439 patients without pleural adhesions (Group B). Group A patients had significantly higher rates of conversion to thoracotomy (9.1% vs. 1.1%; P<0.001) and surgical complications (24.0% vs. 14.4%; P=0.006) than those of Group B patients. No significant difference was found in the overall morbidity and cardiopulmonary complication rates between these two groups. The presence of pleural adhesions was also significantly associated with the prolonged length of chest tube drainage (log-rank P<0.001) and length of stay (log-rank P=0.032). Finally, the presence of pleural adhesions was identified as an independent risk factor for conversion to thoracotomy [odds ratio (OR) =5.49; P=0.003] and surgical complications (OR =1.94; P=0.033) by multivariate logistic-regression analyses.

Conclusions

Presence of pleural adhesions can predict conversion to thoracotomy and postoperative surgical complications in patients undergoing VATS lobectomy for NSCLC. Our study calls for an internationally accepted grading system for the presence of pleural adhesions to stratify the surgical risk.

Unplanned Procedures During Thoracoscopic Segmentectomies

BACKGROUND

Thoracoscopic sublobar resections (TSLRs) are gaining popularity, but are challenging. However, despite technical difficulties, the reported rate of adverse events, complications, and unplanned procedures is low. To understand this paradox, we have studied our series of TSLRs.

METHODS

We reviewed our prospective and intention-to-treat database on videothoracoscopic anatomical resections and extracted all planned thoracoscopic segmentectomies from January 2007 to July 2016. Intraoperative and postoperative data were analyzed. Unplanned procedures were defined as a conversion into thoracotomy or an unplanned additional pulmonary resection.

RESULTS

During the study period 284 thoracoscopic anatomical segmentectomies were performed in 280 patients. There were 124 men and 156 women with a mean age of 64 years (range, 18 to 86 years). Indication for segmentectomy was a proven or suspected non-small cell lung carcinoma in 184 patients, suspected metastasis in 51 patients, and benign lesion in 49 patients. In total, 23 patients had an unplanned procedure (8%). There were 10 unplanned thoracotomies (9 conversions and 1 reoperation; 3.1%) mainly for vascular injuries, and 15 unplanned additional resections (5.1%) distributed among oncological reasons (n = 7), per operative technical issues (n = 6) and postoperative adverse events (lingular ischemia, n = 2). Considering only the 235 patients operated on for cancer, the unplanned additional pulmonary resection rate for an oncological reason was 3%.

CONCLUSIONS

Although lower than for thoracoscopic lobectomies, the rate of unplanned procedure during TSLRs is of concern. It could most likely be reduced by technical refinements, such as a better preoperative planning.

Paeoniflorin prevents postoperative peritoneal adhesion formation in an experimental rat model

Although materials and modern surgical techniques have been developed to suppress postoperative adhesions, adhesion formation can still occur, and thus, a novel effective anti-adhesion drug is greatly needed. In the present study, we explored the efficacy of paeoniflorin treatment against postoperative peritoneal adhesions and examined the anti-oxidative stress and anti-inflammatory properties of PE. Forty-eight male Sprague-Dawley rats were randomly divided into 6 groups for the study: the sham, control, hyaluronan and three concentrations (10, 20 and 40 mg/kg/d) paeoniflorin groups. Abdominal adhesions were created by abrasion of the caecum and its opposite abdominal wall. In the paeoniflorin groups, the rats were administered daily oral doses of paeoniflorin for 7 days. The abdominal cavities of the rats were reopened with a U-shaped incision to macroscopically grade the adhesions. Histologic analysis was performed, and oxidative stress, inflammatory cytokine, collagen fiber degradation and cytokeratin levels were measured. Macroscopic and histopathological measurements revealed that paeoniflorin reduced peritoneal adhesion and inflammation. Notably, treatment with paeoniflorin reduced the protein levels of TGF-β1, IL-6 and COX-2. The collagen fiber fractions were distinctly lower in the PE groups than in the control group. Western blotting analyses showed that paeoniflorin increased MMP-9 and superoxide dismutase-2 protein expression and sharply reduced α-SMA and COX-2 protein expression. Peritoneal mesothelium cells were more continuous and complete in animals treated with paeoniflorin. Our study suggests that paeoniflorin can be used to ameliorate peritoneal adhesions via anti-oxidative stress and anti-inflammatory actions during the postoperative period.

Catastrophes and complicated intraoperative events during robotic lung resection

Intraoperative complications and catastrophes are an accepted and perhaps inevitable aspect of all surgeries. Anatomic pulmonary resection puts in close proximity the tracheal-bronchial tree, pulmonary vasculature, heart and great vessels within the small volume area of the chest. Fortunately, major complications and catastrophes are uncommon regardless of surgical approach. Pulmonary arterial injury is the most frequently reported. Most injuries necessitate a thoracotomy for definitive management though novel techniques are emerging for minimally invasive management. This section focuses on intraoperative pulmonary artery and vein injuries, major airway injuries and transections, injuries to major abdominal organs and effects of carbon dioxide insufflation during robotic pulmonary resection.

First Italian Consensus Conference on VATS lobectomy for NSCLC

PURPOSE

Video-assisted thoracoscopic surgery (VATS) lobectomy has become an accepted procedure for the treatment of selected cases of lung cancer. The aim of this project was to establish national practical recommendations for the management of patients suitable for VATS lobectomy.

METHODS

The Scientific Committee of the VATS Lobectomy Group (a branch of the Italian Society of Thoracic Surgery) identified the consensus conference as an appropriate tool for a national debate. The consensus conference was organized following indications of the Italian Department of Health: a panel of experts reviewed the literature, the jury board revised the experts' reports, and the national conference discussed and voted on statements. The strength of recommendation for a statement was classified as weak, fair, or high when the total score ranged between 51% and 67%, 68% and 84%, or 85% and 100%, respectively.

RESULTS

Eighty-six Italian thoracic surgeons attended the 1st Italian Consensus Conference on VATS lobectomy in Giulianova, Italy, on October 29-30, 2015. Thirty-three topics were discussed: indications, surgical strategy, perioperative management, and training were the main topics. Consensus was reached on 24 statements that were consequently recommended.

CONCLUSIONS

The Italian Consensus Conference is the first attempt to discuss VATS lobectomy-related issues in a national scientific community. Such experience determined an improvement in epistemic knowledge among the Italian thoracic surgeons and could be a suggestion for other national communities.

The evolution of intraoperative conversion in video assisted thoracoscopic lobectomy

INTRODUCTION Unplanned conversion to thoracotomy remains a major concern in video assisted thoracoscopic surgery (VATS) lobectomy. This study aimed to investigate the development of a VATS lobectomy programme over a five-year period, with a focus on the causes and consequences of unplanned conversions. METHODS A single centre retrospective review was performed of patients who underwent complete anatomical lung resection initiated by VATS between January 2010 and April 2015. RESULTS In total, 1,270 patients underwent a lobectomy in the study period and 684 (53.9%) of these were commenced thoracoscopically. There were 75 cases (10.9%) with unplanned conversion. The proportion of lobectomies started as VATS was significantly higher in the second half of the study period (2010-2012: 277/713 [38.8%], 2013-2015: 407/557 [73.1%], p<0.001). The conversion rate dropped initially from 20.4% (11/54) in 2010 to 9.9% (15/151) in 2013 and then remained consistently under 10% until 2015. Conversions were most commonly secondary to vascular injury (26/75, 34.7%). Patients undergoing unplanned conversion had a longer length of stay than VATS completed patients (9 vs 6 days, p<0.001). There was a higher incidence of respiratory failure (10/75 [14.1%] vs 23/607 [3.8%], p<0.001) and 30-day mortality (7/75 [9.3%] vs 6/607 [1.0%], p=0.003) in patients with unplanned conversion than in those with completed VATS. CONCLUSIONS As our VATS lobectomy programme developed, the unplanned conversion rate dropped initially and then remained constant at approximately 10%. With increasing unit experience, it is both safe and technically possible to complete the majority of lobectomy procedures thoracoscopically.