Innovations: Technology and Techniques in Cardiothoracic and Vascular Surgery最新文献

Objective: As lung cancer screening increases, the detection of small, nonpalpable lung lesions is on the rise. The hybrid operation room (OR), which combines percutaneous or endobronchial fiducial placement with on-table computed tomography (CT) and fluoroscopic guidance, improves localization and facilitates the diagnosis and treatment of smaller, nonpalpable lung nodules with greater accuracy.

Methods: In 35 consecutive months, 55 veterans underwent 60 image-guided video-assisted thoracic surgery procedures for lesion resection. Of the cases, 36% were found during lung cancer screening. All patients received their care in the hybrid OR, where cone-beam CT scan technology was used to place an average of 1.6 fiducials percutaneously (n = 55) or via augmented navigational bronchoscopy (n = 5).

Results: A total of 66 lesions were resected. The median lesion size was 8 mm with an interquartile range of 6 to 14. The patients underwent nonanatomical resection with lymph node dissection using radiologic guidance. When indicated, an anatomical resection was subsequently performed. Of 47 total non-small cell lung cancer lesions, 83% were diagnosed at stage IA1 or IA2. The median surgical margin was 15 mm; the margin was usually 1.5 times as wide as the lesion.

Conclusions: The hybrid OR technology gives a 3-dimensional assessment of the small lung lesions, allowing for a tissue-saving resection while achieving good surgical margins. During lung cancer screening, smaller, nonpalpable lung nodules are frequently found. This technology allows resection of subcentimeter lesions, which would otherwise be unresectable at this early stage, possibly improving survival.

Objective: The surgical treatment of aortic stenosis continues to evolve, and sutureless aortic valve replacement (SUAVR) is an emerging technology. With the Perceval S (Corcym, London, UK) as the only true sutureless valve on the market, the objective of this review is to analyze the current literature on Perceval S. Focusing on valve design and deployment as well as applications of the technology for challenging pathology, clinical outcomes are assessed, including a comparison with transcatheter AVR (TAVR).

Methods: PubMed and MEDLINE were searched by 3 authors for studies analyzing SUAVR from inception to May 19, 2023.

Results: SUAVR facilitates minimally invasive surgery and offers an alternative strategy for patients with small aortic annuli. It also has a time-saving advantage for patients who require complex operations. SUAVR results in excellent long-term morbidity, mortality, durability, and hemodynamic function. In comparison with conventional surgical AVR (SAVR), SUAVR does have a greater risk of postoperative pacemaker implantation; however, increasing user experience and refinements in implantation technique have contributed to reductions in this outcome. SUAVR results in morbidity and mortality that is similar to rapid-deployment AVR. Midterm outcomes are superior to TAVR; however, further robust investigation into all of these comparisons is ultimately necessary.

Conclusions: SUAVR bridges the gap in technology between SAVR and TAVR. The application of this exciting technology will undoubtedly grow in the coming years, during which additional investigation is paramount to optimize preoperative planning, valve deployment, and reintervention strategies.

Objective: The aim of this study was to validate the use of a new resection device in patient candidates for surgical aortic valve replacement. We evaluated the efficacy of this new circular blade to resect the aortic valve and the efficacy to collect the debris during the resection.

Methods: For this study, a single size instrument was used, with an external diameter of 22 mm, and patients were selected on the basis of the preoperative assessment of the aortic diameters.

Results: From October 2018 to June 2019, 10 patient candidates for surgical aortic valve replacement were selected to undergo native aortic valve resection using a new device, before surgical valve implantation. The mean age of the patients was 74 ± 7.6 years, and 8 of 10 were male. The mean aortic annulus diameter, measured before the procedure, was 25.7 ± 1.57 mm. The resection was complete in 9 (90%) patients. In 1 patient, due to an imprecise positioning of the device, the valve resection was partial. None of the patients showed signs or symptoms due to debris embolism. In all patients, the postoperative course was uneventful.

Conclusions: These preliminary results show that resection of the aortic valve using a circular foldable blade is feasible. This prototype, used during conventional surgery even through a small incision, provided an efficient tool to easily resect the valve without debris release.

Objective: Robot-assisted minimally invasive direct coronary artery bypass (RA-MIDCAB) is an attractive strategy for coronary revascularization. Growing evidence supports the use of total arterial grafting in coronary surgery. We evaluated total arterial left-sided coronary revascularization with bilateral internal thoracic artery (BITA) using RA-MIDCAB and compared it with a propensity score-matched (PSM) off-pump CAB (OPCAB) surgery population.

Methods: We retrospectively included all isolated OPCAB and RA-MIDCAB surgery using BITA without saphenous vein graft from January 1, 2015, to October 31, 2022. We analyzed all our RA-MIDCAB patients and performed PSM to compare them with our OPCAB population. Primary outcomes were major adverse cardiovascular and cerebrovascular events (MACCE) and mortality. Secondary outcomes were surgical parameters, length of hospital stay, and learning curve.

Results: We included 601 OPCAB and 77 RA-MIDCAB procedures, which resulted in 2 cohorts of 54 patients after PSM. Mortality and MACCE survival analysis showed no significant difference. There was less blood transfusion in the RA-MIDCAB (16.7%) compared with the OPCAB group (38.9%; P = 0.02). We observed fewer intensive care unit (ICU) admissions (24.1% vs 96.6%), shorter ICU stay (0.78 ± 1.7 vs 1.91 ± 1.01 days), and shorter hospital stay (6.78 ± 2.4 vs 8.01 ± 2.5 days) in the RA-MIDCAB versus OPCAB group (P < 0.01). Surgery time decreased from 400.0 ± 70.8 to 325.0 ± 38.0 min with more experience in RA-MIDCAB BITA harvesting (P < 0.01).

Conclusions: This is a first publication of 77 consecutive RA-MIDCAB BITA harvesting for left coronary artery system revascularization. This technique is safe in terms of MACCE and mortality. Additional advantages are shorter length of hospital stay, fewer ICU admissions, and less blood transfusion.

Objective: This study evaluated the efficacy of the Minimally Invasive Targeted Resection (MiTR) device, a novel electrosurgical instrument that allows for targeted excision of a lung abnormality while using bipolar radiofrequency (RF) energy to seal blood vessels and airways.

Methods: The MiTR system was evaluated in 7 acute and 2 chronic porcine (7-day) models to evaluate the efficacy of tissue excision with bipolar RF sealing of blood vessels and airways and application of an autologous blood patch into the excised tissue cavity. Air leak was recorded for all evaluations. The study was approved by the institutional ethical board.

Results: Nineteen lung tissue samples, measuring 2.5 cm long × 1.2 cm diameter, were excised. In 8 of 9 animals (89%), hemostasis and pneumostasis were observed visually at the completion of the procedure. In 2 of 2 chronic animals (100%), hemostasis and pneumostasis persisted for the 7-day observation period. Histologic examination of the excised samples showed preservation of the core parenchymal architecture without evident tissue damage of the samples that would impair pathologic analysis.

Conclusions: Percutaneous resection of targeted lung tissue with the MiTR system demonstrated hemostasis and pneumostasis while obtaining a histologically intact sample. After regulatory approval, the use of this device could offer more tissue for analysis than a transthoracic needle biopsy or bronchoscopy and a far less invasive alternative to video-assisted thoracic surgery or thoracotomy. This may also expand patient and physician options for the early diagnosis and treatment of lung cancer.