Short-Term Outcomes of Mini-Thoracotomy, Multiportal Video-Assisted Thoracic Surgery, and Multiportal Robot-Assisted Thoracic Surgery for Complex Segmentectomy

Lung surgery has long been a balancing act between removing disease and preserving the healthy tissue that keeps a person breathing. For decades, the standard approach involved opening the chest with a large incision, a method that provided surgeons with direct sight and touch but often left patients with significant pain and a slow recovery. In recent years, surgeons have turned to minimally invasive techniques, using small holes and cameras to perform the same operations with less trauma to the body. Among these, removing a specific section of the lung, known as a segmentectomy, has become a preferred option for early-stage cancers and other nodules, as it saves more lung function than removing an entire lobe. However, when the tumor requires a complex removal involving multiple internal planes and delicate blood vessels, the choice of surgical tool becomes critical. The question remains whether the precision of a robot, the flexibility of a camera-guided approach, or the direct access of a small open incision offers the best outcome for these intricate procedures.

Researchers at the Kanagawa Cancer Center in Japan set out to answer this by comparing three distinct methods used for complex lung segmentectomies. They looked at data from 808 patients treated between 2015 and 2026. The first group underwent a mini-thoracotomy, a procedure involving a small 8 to 12-centimeter cut in the chest wall to allow the surgeon to see and feel the tissue directly. The second group received multiportal minimally invasive surgery, which includes both video-assisted thoracic surgery, where the surgeon operates through several small ports while watching a screen, and robot-assisted thoracic surgery, where a robotic system manipulates the instruments with enhanced dexterity and three-dimensional vision. The team used a statistical method to match patients with similar health profiles across these groups, ensuring that differences in outcomes were due to the surgical approach rather than the patients' underlying conditions.

The comparison between the small open incision and the minimally invasive approaches revealed clear advantages for the latter. Patients who underwent the minimally invasive procedures lost significantly less blood during surgery, with an average of 5 milliliters compared to 20 milliliters for those with the open incision. They also experienced less pain in the days following the operation. While both groups used pain medication, the minimally invasive group required fewer doses of "as-needed" painkillers while in the hospital and stopped taking regular oral pain medication sooner, averaging 32 days compared to 36 days for the open surgery group. Additionally, the tubes used to drain fluid from the chest were removed slightly faster in the minimally invasive group. Crucially, the study found that these benefits did not come at the cost of safety or cancer control; the rates of complications, such as infections or air leaks, and the success of removing the tumor with clear margins were comparable between the two methods.

When the researchers looked closer within the minimally invasive group, comparing the video-assisted technique against the robot-assisted technique, they found further nuances. The robotic approach was associated with even less blood loss, averaging just 3 milliliters compared to 5 milliliters for the video-assisted group. More notably, patients treated with the robot stopped taking regular oral pain medication much sooner, averaging 20 days versus 31 days for the video-assisted group. The robotic system also allowed surgeons to collect more lymph nodes from the area around the lung and the center of the chest, which is important for accurate cancer staging. While the video-assisted group had a few more instances where the surgery had to be converted to a larger open incision, the overall safety profile, including the time spent in surgery and the rates of complications, remained very similar between the two minimally invasive methods.

The study suggests that for complex lung segmentectomies, minimally invasive techniques generally offer a smoother recovery with less blood loss and pain than a small open incision, without compromising the removal of the tumor. Within the minimally invasive options, the robotic approach appears to provide specific benefits, particularly in reducing the duration of pain medication use and improving the collection of lymph nodes, likely due to the system's ability to maneuver instruments with greater precision in tight spaces. While the study focused on short-term outcomes and did not track long-term survival rates, the findings provide strong evidence that these advanced, less invasive methods are safe and effective for handling the most demanding lung surgeries.