Lung Biopsy With a Non-intubated VATS Approach in an Obese Population: Indications and Results

From Awake to Minimalist Spontaneous Ventilation Thoracoscopic Lung Surgery: An Ongoing Journey

Spontaneous ventilation lung surgery (SVLS) without intubation is aimed at avoiding adverse effects of mechanical ventilation lung surgery (MVLS) entailing one-lung mechanical ventilation through a double-lumen tracheal tube. This innovative strategy has evolved following the publication of a small randomized study of thoracoscopic pulmonary wedge resection carried out under spontaneous ventilation without tracheal intubation in fully awake patients. It now entails target-controlled sedation, the use of a laryngeal mask, and thoracic analgesia by intercostal or paravertebral blocks and has shown promise both in unicenter and multicenter studies, resulting in optimal feasibility and safety and highly satisfactory results, particularly in patients undergoing lung cancer resection and metastasectomy, lung biopsy for undetermined interstitial lung disease, lung volume reduction surgery for end-stage emphysema, and bullectomy for primary and secondary spontaneous pneumothorax. However, concerns and unresolved issues still exist regarding the advantages and disadvantages of SVLS as well as the identification of optimal indications. This perspective is aimed at providing a critical overview of the current knowledge about SVLS with emphasis on recent data comparing the results with those of MVLS published in the last 10 years.

Nonintubated video-assisted thoracic surgery: myth or reality?

PURPOSE OF REVIEW

This review discusses nonintubated video-assisted thoracic surgery (NIVATS) by presenting its physiological, technical aspects and recent clinical data from the literature.

RECENT FINDINGS

In the last two decades, NIVATS has gained traction as an alternative to traditional intubated thoracic surgery, offering potential benefits in terms of reduced complications, faster recovery times, and improved patient satisfaction. Several approaches to this technique have been described in the literature, mainly divided into the awake patient technique (awake-NIVATS) and the asleep patient technique (asleep-NIVATS). The availability of various sedatives, numerous devices to ensure good oxygenation, and the countless loco-regional techniques available today for pain control in the thoracic region offer the possibility to develop many anesthesia protocols in this context. Numerous studies have already shown that NIVATS is feasible and safe with proper patient selection and adequate collaboration of the surgical team. Some studies have also shown that NIVATS may improve patient outcomes, but the evidence is still limited.

SUMMARY

Literature has demonstrated the feasibility of NIVATS and suggest that it can improve patient outcomes. High-quality international randomized multicenter studies comparing NIVATS and intubated video-assisted thoracic surgery are necessary for a strong comprehension to clarify whether it can be a technique that can guarantee safety and improve the perioperative course of patients.

Cost-effectiveness and postoperative outcomes of spontaneous vs. mechanical ventilation during video-assisted thoracoscopic surgery: a retrospective study

Background

Video-assisted thoracoscopic surgery (VATS) is known to have the advantages of being minimally invasive, reducing complications, and shortening hospitalization time. However, related cost surveys have been inconsistent. In recent years, a new concept of tubeless anesthesia has been introduced, but its impact on the cost-effectiveness of VATS is unclear. This study compared the hospitalization costs and postoperative outcomes in patients undergoing spontaneous ventilation VATS (SV-VATS) and mechanical ventilation VATS (MV-VATS).

Methods

We retrospectively analyzed data on the VATS procedures performed at the Shaoxing People's Hospital from June 2022 to July 2023. Overall, 386 patients who met the inclusion criteria were treated with SV-VATS (n=57) or MV-VATS (n=329). Comprehensive cost comparisons were performed between the groups.

Results

The two groups shared comparable clinical characteristics, such as age (P=0.64), sex (P=0.72), body mass index (BMI) (P=0.68), and type of procedure (P=0.43). All costs are expressed in U.S. dollars ($). The overall, diagnostic, operation, and material costs of SV-VATS and MV-VATS were $3,858.71±$746.32 vs. $3,870.26±$990.69 (P=0.94), $911.83 vs. $908.73 (P=0.51), $875.58 vs. $875.58 (P=0.51), and $1,560.5 vs. $1,596.91±$727.18 (P=0.31), respectively. In addition, the median costs of anesthesia materials and total medications were $233.51 vs. $324.02 and $290.63 vs. $364.14, respectively (P<0.001). Among medications, the cost of anesthesia medicine was $179.6±$45.48 vs. $224.12±$54.67, respectively (P<0.001). Postoperative complications, including sore throat, hoarseness, and expectoration, did not occur in the SV-VATS group, whereas 13, 11, and 10 cases were noted, respectively, in the MV-VATS group (13.5%, 11.5%, and 10.4%, respectively; P=0.01, P=0.03, P=0.041). The time to extubation in the SV-VATS and MV-VATS groups was 4 and 10 min, respectively (P<0.001). No intermediate surgery was performed in either group.

Conclusions

Compared with SV-VATS, MV-VATS can reduce patients' anesthesia and medicine costs and has similar postoperative adverse event rates in VATS patients, which is conducive to accelerating patient recovery. Therefore, tubeless anesthesia is recommended for future VATS.

Case report: Simultaneous resections of pulmonary segment and an esophageal leiomyoma during spontaneous ventilation video-assisted thoracoscopic surgery

Spontaneous ventilation video-assisted thoracoscopic surgery (SV-VATS) has rapidly developed in recent years. The application scope is still being continuously explored. We describe a case in which a 40-year-old woman with mixed ground-glass opacity (GGO) and an esophageal leiomyoma successfully underwent simultaneous segmentectomy and leiomyoma resection through spontaneous ventilation video-assisted thoracoscopic surgery. The perioperative course was uneventful. Postoperative pathology revealed minimally invasive adenocarcinoma and esophageal leiomyoma.

Correlation between high-resolution computed tomography appearance and histopathological features in the diagnosis of interstitial lung diseases. A real-life study

BACKGROUND

According to current guidelines, a surgical biopsy is rarely required when a high-confidence radiologic interstitial lung disease (ILD) diagnosis is made on thin-section high-resolution computed tomography (HRCT). Nevertheless, disowning HRCT scans diagnosed by biopsy are more common than presumed. Our study aimed to describe the concordance rate between HRCT scans and pathological diagnoses of ILDs obtained by surgical biopsy. The current guideline suggests the use of surgical lung biopsy (SLB) in patients with newly detected ILD of unknown cause.

METHODS

Patients who underwent mini-invasive surgical biopsies for interstitial lung diseases from January 2018 to August 2022 were analyzed. The HRCT scans were reviewed by an observer blinded to the patient's clinical information. The concordance between histological and HRCT-scan were assessed.

RESULTS

Data from 104 patients with uncertain low confidence diagnosis of interstitial lung diseases at HRCT were analyzed. Most of the patients are male (65; 62.5%). The more frequent HRCT pattern were: alternative diagnoses (46; 44.23%), UIP probable (42; 40.38%), UIP indeterminate (7; 6.73%), and non-specific interstitial pneumonia (NSIP) (9, 8.65%). The more common histological diagnosis was UIP definite (30; 28.84%), hypersensitivity pneumonia [HP](19; 18.44%), NSIP (15; 14.42%), sarcoidosis (10; 9.60%). In 7 (20%) cases, the final pathological finding denies HRCT-scans diagnoses; indeed, a moderate agreement was observed between HRCT-scan findings and the definitive histological diagnosis (kappa index: 0.428).

CONCLUSIONS

HRCT-scan has limitations if the objective is to define interstitial lung diseases accurately. Consequently, pathological assessment should be taken into account in order to provide more accurate tailored treatment strategies because the risk is to wait from 12 to 24 months to ascertain if the ILD will be treatable as progressive pulmonary fibrosis (PPF). Undeniably true, video-assisted surgical lung biopsy (VASLB) with endotracheal intubation and mechanical ventilation is associated with a risk of mortality and morbidity that is far from nil. Nevertheless, in recent years a VASLB approach performed in awake subjects under loco-regional anesthesia (awake-VASLB) has been suggested as an effective method to obtain a highly confident diagnosis in patients with diffuse pathologies of the lung parenchyma.

Spontaneous Ventilation Thoracoscopic Lung Biopsy in Undetermined Interstitial Lung Disease: Systematic Review and Meta-Analysis

Thoracoscopic surgical biopsy has shown excellent histological characterization of undetermined interstitial lung diseases, although the morbidity rates reported are not negligible. In delicate patients, interstitial lung disease and restrictive ventilatory impairment morbidity are thought to be due at least in part to tracheal intubation with single-lung mechanical ventilation; therefore, spontaneous ventilation thoracoscopic lung biopsy (SVTLB) has been proposed as a potentially less invasive surgical option. This systematic review summarizes the results of SVTLB, focusing on diagnostic yield and operative morbidity. A systematic search for original studies regarding SVTLB published between 2010 to 2023 was performed. In addition, articles comparing SVTLB to mechanical ventilation thoracoscopic lung biopsy (MVTLB) were selected for a meta-analysis. Overall, 13 studies (two before 2017 and eleven between 2018 and 2023) entailing 675 patients were included. Diagnostic yield ranged from 84.6% to 100%. There were 64 (9.5%) complications, most of which were minor. There was no 30-day operative mortality. When comparing SVTLB to MVTLB, the former group showed a significantly lower risk of complications (p < 0.001), whereas no differences were found in diagnostic accuracy. The results of this review suggest that SVTLB is being increasingly adopted worldwide and has proven to be a safe procedure with excellent diagnostic accuracy.

The Year in Thoracic Anesthesia: Selected Highlights from 2022

This article reviews research highlights in the field of thoracic anesthesia. The highlights of this year included new developments in the preoperative assessment and prehabilitation of patients requiring thoracic surgery, updates on the use of devices for one-lung ventilation (OLV) in adults and children, updates on the anesthetic and postoperative management of these patients, including protective OLV ventilation, the use of opioid-sparing techniques and regional anesthesia, and outcomes using enhanced recovery after surgery, as well as the use of expanding indications for extracorporeal membrane oxygenation, specialized anesthetic techniques for airway surgery, and nonintubated video-assisted thoracic surgery.

Clinical application of intubation-free anesthesia in radical resection of lung cancer

Background

In recent years, video-assisted thoracic surgery (VATS) has become increasingly widespread. However, the implementation of VATS requires the assistance with lung isolation techniques. Spontaneous breathing with laryngeal masks is also increasingly used in VATS. However, evidence on the characteristics of intubated anesthesia is insufficient.

Objective

This study aimed to explore whether intubation-free anesthesia has more advantages than other intubation methods in the clinical setting.

Methods

Patients with lung tumors who underwent VATS in our hospital between June 2022 and October 2022 were included in the study. Perioperative data of patients, including basic information, intraoperative hemodynamic changes, postoperative inflammatory indicators, and adverse reactions were obtained through the electronic medical record system. According to the protocol of airway management during anesthesia, participants were divided into the following groups: laryngeal mask with spontaneous breathing group (LMSB group), laryngeal mask combined with bronchial blocker group (LM + BB group), double-lumen tube group (DLT group), and tracheal tube combined with bronchial blocker group (TT + BB group). All data were analyzed using SPSS 25.0 software.

Results

At baseline, patients in the LMSB and LM + BB groups had a lower body weight (P = 0.024). Systolic blood pressure (SBP), diastolic BP (DBP), and heart rate (HR) were significantly higher in the DLT group than in the non-intubated group during surgery (SBP: T1 P = 0.048, T4 P = 0.021, T5 P ≤ 0.001, T6 P ≤ 0.001, T7 P = 0.004; DBP: T5 P ≤ 0.001, T6 P ≤ 0.001, T7 P ≤ 0.001; HR: T1 P = 0.021, T6 P ≤ 0.001, T7 P = 0.007, T8 P ≤ 0.001). The input fluid (P = 0.009), urine output (P = 0.010), surgery duration (P = 0.035), and procalcitonin levels (P = 0.024) of the DLT group were also significantly higher than those of the other groups. The recovery duration of the LMSB group was significantly longer (P = 0.003) and the incidence of postoperative adverse reactions, mainly atelectasis, was higher (P = 0.012) than those of the other groups.

Conclusion

Although the intubation-free anesthesia has less stimulation during operation and less postoperative inflammatory response, it has obvious adverse reactions after operation, which may be not the best anesthesia scheme for radical resection of lung cancer in VATS.

Clinical trial registration

https://www.chictr.org.cn/showproj.html?proj=182767, identifier ChiCTR2200066180.