The Single-Stage Solution: Mid-Term Experience with Hybrid Thoracic Endovascular Aortic Repair and Cervical Debranching Bypass in 84 Consecutive Patients

The human aorta is the body's main highway, a thick, muscular tube that carries oxygen-rich blood from the heart to the rest of the system. When the upper part of this highway, known as the aortic arch, develops a tear or a dangerous bulge, doctors often use a minimally invasive technique called thoracic endovascular aortic repair. This procedure involves threading a fabric-covered tube, or stent graft, through the arteries from the groin up to the chest to seal off the damaged section. However, a significant challenge arises when the damage sits right at the curve where the aorta branches off to feed the head and arms. To seal the tear effectively, the stent graft must cover the opening of these vital branches. If the blood flow to the brain or left arm is blocked without an alternative route, it can lead to a stroke or loss of limb function. To solve this, surgeons developed a hybrid approach: they perform the internal stent procedure while simultaneously creating a new blood vessel detour around the neck to keep the brain and arm supplied. This study explores the safety and success of performing these two complex steps as a single, continuous operation rather than splitting them into separate surgeries.

Researchers at the Guangdong Provincial Hospital of Chinese Medicine tracked the outcomes of 84 patients who underwent this single-stage hybrid procedure between 2018 and 2025. The team focused on how the surgery was performed and how the patients fared over the following years. In every case, the surgeons successfully completed the operation, which involved two distinct parts. First, they created a bypass using a synthetic tube to reroute blood flow around the blocked areas in the neck. Depending on the patient's specific anatomy, they used one of two configurations: either a direct connection from the left carotid artery to the left subclavian artery, or a more complex route starting from the right carotid artery, crossing over to the left carotid, and then down to the left subclavian artery. Once this new pathway was established, the surgeons moved to the second phase, deploying the stent graft inside the aorta to seal the damaged arch. The entire process took place in a specialized operating room equipped for both open surgery and advanced imaging, allowing the team to switch seamlessly between cutting and catheter-based work.

The results showed that this combined approach is highly effective, though the complexity of the bypass matters. The average surgery lasted just under five hours, but the more complex bypass route took significantly longer than the direct one. While the overall success rate was high, the outcomes differed based on the surgical path chosen. Patients who received the simpler, direct bypass had no deaths during their hospital stay, whereas those who underwent the more extensive, multi-step bypass experienced a higher rate of in-hospital mortality. Over the course of a median follow-up period of 3.3 years, the direct bypass group maintained a perfect survival record, while the more complex group saw a slight decline in survival rates, though both groups fared well compared to historical standards for such severe conditions. The synthetic tubes used for the bypass remained open and functional in the vast majority of patients, with only a few instances of blockage occurring years after the surgery.

Complications were relatively rare but did occur. A small number of patients experienced strokes, and a few reported temporary or permanent hoarseness, which resulted from irritation to the nerves that control the voice box during the neck dissection. The study noted that the rate of these voice issues was consistent with other major vascular surgeries. There were also minor instances of blood leaks around the stent graft, but most resolved on their own or were easily monitored. The researchers found that the more complex bypass procedure, involving three connection points, carried a heavier burden on the patient's body, leading to longer operation times and higher risks compared to the simpler two-point connection. This suggests that when the anatomy allows, the direct route is the safer and more efficient choice.

Ultimately, the study confirms that performing the neck bypass and the aortic stent placement in one sitting is a viable and often successful strategy for treating complex aortic diseases. The data indicates that while the technique works well, the specific design of the bypass should be tailored to minimize unnecessary complexity. The simpler bypass configuration not only shortened the time under anesthesia but also resulted in better survival rates for the patients. Although the study was limited to a single center and a specific group of patients, the findings provide a clear roadmap for surgeons: when the anatomy permits, a direct, single-bypass route offers the best balance of safety and long-term durability, allowing patients to recover from a life-threatening condition with fewer setbacks.