A lung transplant typically takes between six and twelve hours from the first incision to chest closure, though the total time you spend in the operating room can stretch beyond that when preparation and anesthesia setup are included. The wide range reflects the difference between a single-lung transplant and a bilateral (double-lung) procedure, along with patient-specific factors like scar tissue from prior surgeries. One study comparing two types of circulatory support during bilateral transplants recorded average operative times of roughly six hours in one group and seven and a half hours in the other, which gives a sense of the middle of the range for a procedure that goes according to plan.
Single Versus Bilateral Transplants
The single biggest determinant of how long surgery takes is whether one lung or both are being replaced. A single-lung transplant involves removing one diseased lung and implanting the donor organ, which generally runs shorter. A bilateral sequential transplant, the more common procedure today, means removing and replacing both lungs one at a time. The second side adds substantial time because the surgical team essentially repeats the core steps: freeing the native lung from its attachments, clamping and dividing the airway and blood vessels, sewing in the donor lung, and restoring blood flow.
In a study comparing extracorporeal membrane oxygenation (ECMO) with traditional cardiopulmonary bypass (CPB) as circulatory support during bilateral transplants, the ECMO group averaged about 451 minutes in surgery and the CPB group about 346 minutes. That spread of roughly six to seven and a half hours represents cases where both lungs were replaced, and neither group experienced major support-related complications.1European Journal of Cardio-Thoracic Surgery. Replacing cardiopulmonary bypass with extracorporeal membrane oxygenation in lung transplantation operations Single-lung operations generally fall on the shorter end, sometimes finishing closer to four or five hours, though published operative-time data for single-lung cases alone is less commonly reported as a standalone figure.
What Happens During the Surgery
Understanding the steps helps explain why the clock adds up the way it does. Before any cutting begins, the anesthesia team places monitoring lines, establishes intravenous access, and intubates the patient with a specialized double-lumen breathing tube that allows each lung to be ventilated independently. That setup alone can take an hour or more.
The incision is typically a large transverse cut across the lower chest called a clamshell incision for bilateral cases, or a thoracotomy on one side for a single-lung procedure. Once the chest is open, the surgeon frees the diseased lung from the chest wall and the structures around it. In a straightforward case this goes relatively quickly, but adhesions from prior infections, surgeries, or inflammation can turn it into one of the most time-consuming parts of the operation.
After the native lung is removed, the donor lung is brought to the field. Three connections need to be made: the bronchus (airway), the pulmonary artery, and the pulmonary veins where they join the left atrium. Each anastomosis is hand-sewn under magnification, and the surgeon checks for air leaks and bleeding before restoring blood flow. For a bilateral case, the team then turns to the other side and repeats the entire sequence. Throughout, the anesthesiologist manages single-lung ventilation and coordinates with perfusionists if mechanical circulatory support is in use.
Once both lungs are implanted and functioning, the team reverses any blood-thinning medication, places chest drainage tubes, and closes the incision.2Operative Techniques in Thoracic and Cardiovascular Surgery. Median Sternotomy for Lung Transplantation Closure itself is meticulous because the large incision must be stabilized, often with wires through the sternum if a clamshell approach was used.
The Role of Circulatory Support
Not every lung transplant requires a heart-lung machine or ECMO, but many do. When a patient cannot tolerate having one lung clamped off while the surgeon works on the other, some form of mechanical support keeps blood oxygenated and circulating. The choice between traditional cardiopulmonary bypass and ECMO has shifted over the past two decades, with many centers now favoring ECMO because it tends to require less blood thinning and may cause less inflammation.
That said, ECMO-supported operations can run longer. The study mentioned earlier found that operative time in the ECMO group averaged about 105 minutes more than in the CPB group, though the difference did not reach statistical significance given the variability involved.1European Journal of Cardio-Thoracic Surgery. Replacing cardiopulmonary bypass with extracorporeal membrane oxygenation in lung transplantation operations Part of this extra time reflects the setup and weaning process for ECMO. In some patients with severely elevated pressures in the pulmonary arteries, ECMO support is continued into the intensive care unit after surgery, which blurs the line between “operative time” and “postoperative support.”
Why Some Transplants Run Much Longer
While six to eight hours covers many bilateral cases, some transplants take considerably longer. Several patient-specific and surgical factors push the clock well past the average.
- Prior chest surgery or pleurodesis: Patients who have had previous lung operations, or who underwent pleurodesis (a procedure that intentionally scars the lung to the chest wall to prevent collapse), often have dense adhesions. Freeing the lung from these adhesions is painstaking work that adds hours and increases bleeding risk.
- Redo transplants: Replacing a previously transplanted lung is among the most technically demanding scenarios. Scar tissue from the first transplant, combined with the need to carefully divide old surgical connections, leads to prolonged operating times and heavier use of blood products.
- Underlying disease severity: Conditions like cystic fibrosis can create chronically infected, densely scarred lungs that are extremely difficult to remove. Patients with pulmonary hypertension may have fragile, high-pressure blood vessels that require more careful handling.
- Intraoperative bleeding: Significant blood loss at any point during the operation forces the team to pause, control bleeding, and transfuse, all of which extend surgical time.
A case report of bilateral transplant in a patient with prior pleurodesis for thoracic endometriosis described the operation as “technically demanding” specifically because of dense pleural adhesions, which increased bleeding risk and operative time during the removal of the native lungs.3American Journal of Respiratory and Critical Care Medicine. Complex Bilateral Lung Transplantation After Prior Pleurodesis for Thoracic Endometriosis: Role of Proactive Early ECMO in OR Redo lung transplants carry higher mortality partly because of these prolonged operating times and the greater need for cardiopulmonary bypass and transfusions.4PubMed Central. Lung Transplantation Retransplantation Outcomes at a Large Lung Transplantation Program5PubMed Central. Time since primary transplant and poor functional status predict survival after redo lung transplant
Why Operative Time Matters for Outcomes
A longer operation is not just inconvenient; it carries measurable clinical consequences. One of the most important early complications after lung transplant is primary graft dysfunction, essentially the new lung becoming inflamed and not working properly in the first few days. Research has found that longer operative time is a risk factor for this complication. In a study examining surgical factors, patients whose operations exceeded roughly eight hours had a significantly higher rate of severe primary graft dysfunction, along with more acute kidney injury and digital ischemia (reduced blood flow to fingers and toes).6PubMed Central. Recipient, donor, and surgical factors leading to primary graft dysfunction after lung transplant
This does not mean an eight-hour transplant is a failed one. Many bilateral procedures cross that threshold and yield excellent results. But the association is real enough that surgical teams actively try to minimize unnecessary delays. Efficiency in the operating room is one reason high-volume transplant centers tend to produce better outcomes, as discussed further below.
The Ischemic Clock Running in the Background
Operative time is only part of the time pressure. From the moment the donor lungs lose their blood supply during retrieval, a separate clock starts ticking: ischemic time, or how long the organ goes without circulation. Historically, the safe window was considered four to six hours.7Annals of Thoracic Surgery. Effect of Ischemic Time on Survival in Clinical Lung Transplantation In practice, broader sharing of donor lungs across wider geographic areas has pushed many transplants beyond that mark, and outcomes data suggests the lungs are more resilient than originally assumed.
A study from a high-volume center specifically looked at lungs implanted after eight or more hours of ischemic time and found that the traditional six-hour cutoff was overly conservative for many patients.8PubMed Central. Lung transplantation using allografts with more than 8 hours of ischemic time: A single-institution experience A larger analysis stratified extended ischemic times into mild (six to eight hours), moderate (eight to ten hours), and long (over ten hours) categories and examined outcomes across thousands of transplants, confirming that the effect of ischemic time varies by the type of procedure.9PubMed. The effect of allograft ischemic time on outcomes following bilateral, single, and reoperative lung transplantation
What this means practically is that the surgical team is balancing two time pressures at once: they want to be thorough and meticulous with each anastomosis, but they also want to restore blood flow to the donor lung as quickly as possible. In a bilateral case, the second lung implanted will have a longer ischemic time than the first, so teams typically implant the lung going to the more diseased side first while the patient can still be supported by the other native lung.
Ex Vivo Lung Perfusion and Its Effect on Timing
One technology changing the ischemic-time equation is ex vivo lung perfusion, or EVLP. Instead of keeping donor lungs on ice in a cooler, EVLP systems perfuse and ventilate the lungs at near-body temperature outside the body. This serves two purposes: it lets the team assess borderline donor lungs before committing to transplant, and it can extend the total preservation window significantly.10PubMed Central. Ex Vivo Lung Perfusion: A Review of Current and Future Application in Lung Transplantation
From the patient’s perspective, EVLP can actually add hours to the overall timeline of the transplant process because the donor lungs spend time on the perfusion device before being brought into the operating room. But the trade-off is better organ quality and potentially better early function after implantation. It also gives the surgical team more scheduling flexibility, reducing the frantic middle-of-the-night urgency that has traditionally characterized transplant surgery.
Robotic and Minimally Invasive Approaches
A small but growing number of centers have begun performing lung transplants using robotic-assisted minimally invasive techniques, avoiding the large clamshell incision. Early results from one program showed that the robotic approach had a longer median total ischemic time compared to conventional open surgery, roughly 486 minutes versus 408 minutes.11PubMed Central. Robotic Lung Transplantation: Feasibility, Early Results and 3-Year Outcomes Some of that added time reflects the learning curve and the extra setup involved with robotic instrumentation, and some reflects a deliberate strategy of planned delay using cold storage at lower temperatures.
Three-year outcomes from that early cohort were reported as favorable, suggesting the longer operative times did not necessarily translate to worse results. But robotic lung transplantation remains experimental and limited to a handful of experienced centers. For most patients, the conventional open approach is still standard. The relevance here is that surgical innovation may eventually shorten recovery even if it does not shorten time on the table, since smaller incisions typically mean less postoperative pain and faster mobilization.
Pediatric Lung Transplants
Children undergoing lung transplantation face some distinct considerations that affect surgical duration. One important difference is the near-universal use of cardiopulmonary bypass in pediatric cases. A study comparing pediatric and adult transplants for cystic fibrosis found that CPB was used in virtually all pediatric patients but only about 15% of adults.12PubMed. Pediatric and adult lung transplantation for cystic fibrosis This reflects the smaller airways and blood vessels involved, as well as the fact that children may not tolerate single-lung ventilation as readily.
The use of bypass adds time to any operation for setup and weaning, and smaller anatomic structures mean each suture line takes more precision. Donor-recipient size matching can also require creative surgical modifications, such as trimming a larger donor lung to fit a small child’s chest cavity, or using a lobe from an adult donor rather than an entire lung. These adjustments add steps and minutes but are essential for a successful outcome.
Coordination Before You Reach the Operating Room
From the patient’s perspective, the waiting and preparation that precede the actual surgery can feel like part of the operation itself. Once a suitable donor organ becomes available, a cascade of events must unfold in rapid sequence. A coordinator manages the entire process, organizing retrieval teams, operating room staff, anesthesiologists, perfusionists, and transport logistics.13PubMed. Maximizing thoracic organ transplant opportunities: the importance of efficient coordination For donation after circulatory death (DCD) cases, this coordination is even more time-sensitive, since the organ procurement timeline is less predictable.14OBM Transplantation. Optimizing Donor Management Strategies for DCD Lung Procurement
The recipient may be called to the hospital hours before surgery actually begins. Preoperative blood work, final imaging, anesthesia consultation, and placement of central lines all happen during this window. Meanwhile, the retrieval team is traveling to the donor hospital, evaluating the lungs in person, and beginning the procurement. The surgery on the recipient side often starts before the donor lungs arrive at the hospital, with the team opening the chest and beginning to free the native lungs so that the transition can happen as soon as the donor organs are in the building. This parallel workflow is a deliberate strategy to keep ischemic time as short as possible.
How Surgeon and Center Experience Affect Efficiency
Not all transplant centers operate at the same pace, and experience matters. A large study examining surgeon volume and outcomes found that surgeons who performed more than 40 transplants over the study period had roughly 7 to 8% lower five-year mortality compared to those with the lowest volumes.15Journal of Heart and Lung Transplantation. Influence of Surgeon Practice and Volume on Lung Transplant Outcomes While this study measured outcomes rather than operative time directly, the two are linked: experienced teams tend to work more efficiently, encounter fewer surprises, and manage complications with less delay.
High-volume centers also tend to have more refined protocols for the parallel logistics described above, meaning less idle time between the patient being prepped and the donor lungs arriving. If you are facing a lung transplant and have some choice in where to have it done, center volume is one of the more meaningful variables to consider.
What Happens Immediately After Surgery
Once the chest is closed, you are moved to the intensive care unit still on a ventilator. Most patients who have an uncomplicated course are breathing on their own within one to three days. A study of over 200 lung transplant recipients found that the median duration of mechanical ventilation for patients without prolonged courses was about two days. However, roughly 28% of patients in that cohort required prolonged mechanical ventilation, with a median duration of 34 days. Independent risk factors for that prolonged course included higher body mass index, diabetes, the need for ECMO during surgery, and receiving five or more units of blood intraoperatively.16Frontiers in Medicine. Prolonged mechanical ventilation after lung transplantation: risks factors and consequences on recipient outcome
The total hospital stay after a lung transplant is usually two to four weeks if things go smoothly, though patients with complications can stay much longer. Physical rehabilitation begins early, often within days of extubation. The surgical time itself, while important, is just one piece of a recovery timeline that stretches out over months as immunosuppressive medications are adjusted and lung function is monitored with regular biopsies and breathing tests.