A lung transplant can offer a new treatment option for people with advanced lung disease, but it is also a major surgical procedure with important risks. Complications can occur during surgery, in the first days or weeks after transplantation, or months and years later.
Some complications are related to the surgery itself, while others occur because the immune system can attack the transplanted lung or because medicines used to prevent rejection affect the body's ability to fight infection and can have other side effects.
Understanding the potential lung transplant surgery risks does not mean that complications will necessarily occur. The transplant team monitors recipients closely before, during and after transplantation to identify problems early and treat them appropriately.
What Are the Main Risks of a Lung Transplant?
The risks associated with lung transplantation can broadly be divided into early and long-term complications. Important risks include:
- Primary graft dysfunction
- Bleeding and complications related to major surgery
- Infections
- Acute lung transplant rejection
- Airway or blood vessel complications
- Blood clots and other postoperative complications
- Side effects from immunosuppressive medicines
- Chronic lung allograft dysfunction
- Increased risk of certain cancers
- Other long-term complications affecting the kidneys, bones, blood pressure or metabolism
The likelihood and severity of these complications vary between individuals. Your underlying disease, overall health, type of transplant and condition before surgery can all influence the risk.
What Are the Early Complications After Lung Transplant?
The first days and weeks after transplantation are an important period because the body is recovering from major surgery while the newly transplanted lung is adjusting to its new environment. Some complications can require intensive monitoring or additional treatment during this period.
*AI-generated image - for illustration only. Clinical accuracy is not guaranteed.
Primary Graft Dysfunction
Primary graft dysfunction, or PGD, is an acute form of lung injury that can occur soon after transplantation. The transplanted lung may not function normally immediately after surgery and can develop inflammation and fluid accumulation.
The severity can vary. Some patients may need additional breathing support, while more severe cases can require prolonged mechanical ventilation or extracorporeal membrane oxygenation (ECMO).
Primary graft dysfunction is different from rejection. It occurs early after transplantation and is associated with the injury that can develop during the process of organ donation, preservation, transplantation and restoration of blood flow to the lung.
Bleeding After Lung Transplant Surgery
Lung transplantation involves major surgery in the chest, and bleeding can occur during or after the procedure. The surgical team monitors blood loss closely and may use blood products or other treatments when required.
In some cases, significant bleeding may require additional intervention or a return to the operating room. The risk depends on factors such as the complexity of the surgery, the patient's condition and whether there are other problems affecting blood clotting.
Infections After a Lung Transplant
Infections are among the most common complications following lung transplantation. This is partly because immunosuppressive medicines reduce the immune system's ability to fight infection.
Infections can affect different parts of the body, including:
- The lungs and respiratory tract
- The urinary tract
- The surgical wound
- Areas around medical tubes or catheters
- The bloodstream
Infections can occur soon after surgery and may also develop months or years later. The transplant team may use preventive medicines, monitoring and other measures to reduce infection risk. If an infection develops, treatment depends on the organism and where the infection is located.
Why Is Infection a Particular Concern After Lung Transplant?
The lungs are continuously exposed to the outside environment through breathing, while immunosuppressive medicines reduce the body's normal immune response.
Together, these factors can make infections particularly important after lung transplantation. Some infections can also produce symptoms that resemble rejection, such as breathlessness, cough, fatigue or a decline in lung function. This means the transplant team may need to perform several tests to determine the underlying cause.
Lung Transplant Rejection
Rejection occurs when the immune system recognises the transplanted lung as foreign and attacks it. Rejection can occur even when immunosuppressive medicines are taken correctly.
*AI-generated image - for illustration only. Clinical accuracy is not guaranteed.
It may be detected through changes in symptoms, lung function or routine monitoring, and some episodes may initially cause few noticeable symptoms.
Acute cellular rejection and antibody-mediated rejection are among the types that may occur after transplantation. Treatment generally involves adjusting or intensifying immunosuppressive therapy according to the type and severity of rejection.
Because rejection is an important but distinct complication, it requires its own detailed assessment rather than being diagnosed from symptoms alone.
Airway Complications
During transplantation, the donor airway is connected to the recipient's airway. Problems can occasionally develop at this connection as the tissues heal. Airway complications may include narrowing, weakness of the airway wall or problems with healing.
These changes can affect airflow and may lead to symptoms such as breathlessness, cough or recurrent respiratory problems. The transplant team may use imaging or bronchoscopy to examine the airways when a problem is suspected.
Blood Vessel Complications
The donor lung also needs to be connected to the recipient's pulmonary blood vessels. Rarely, complications can occur at these connections or affect blood flow through the transplanted lung.
Because adequate blood flow is essential for oxygen exchange, significant vascular complications require prompt assessment and treatment.
Fluid Around the Lung
Fluid can collect around the transplanted lung after surgery. Small amounts may be expected during recovery, but larger or persistent collections may require further investigation and treatment.
Fluid around the lung can also occur in association with other postoperative problems, so the transplant team evaluates the underlying cause rather than treating the finding in isolation.
Blood Clots and Other Surgical Complications
As with other major operations, lung transplantation can be associated with complications such as blood clots, abnormal heart rhythms and problems related to prolonged hospitalisation or reduced mobility. The transplant team uses monitoring, medicines and early mobilisation when appropriate to reduce these risks.
Why Do Kidney Problems Occur After Lung Transplant?
Kidney function can be affected after transplantation for several reasons. Some immunosuppressive medicines can affect the kidneys, while changes in blood pressure, dehydration, infections and other medical problems can also contribute.
Kidney function is therefore monitored through regular blood tests and other assessments. If kidney function changes, the transplant team may review medicines and look for other possible causes.
Can Diabetes Develop After a Lung Transplant?
Some transplant recipients develop high blood sugar or diabetes after transplantation. Steroids and certain other immunosuppressive medicines can contribute to changes in glucose metabolism.
Blood glucose is monitored after transplantation, particularly when higher doses of steroids are required. If persistent high blood sugar develops, dietary measures, medicines or other treatment may be recommended.
*AI-generated image - for illustration only. Clinical accuracy is not guaranteed.
Is There a Risk of Cancer After Lung Transplant?
People who receive organ transplants have an increased risk of certain cancers compared with the general population. One important reason is long-term suppression of the immune system, which can reduce the body's ability to identify and control abnormal cells.
The type and degree of risk vary between cancers and individual patients. Regular medical follow-up and appropriate age- and risk-based cancer screening are therefore important after transplantation.
Can Lung Transplant Complications Affect Long-Term Recovery?
Yes. Some complications are temporary and can be successfully treated, while others may have longer-lasting effects on lung function or overall health.
For example, an infection may resolve with appropriate treatment, while repeated episodes of rejection or chronic lung allograft dysfunction can cause more persistent changes in the transplanted lung.
This is why long-term follow-up remains an essential part of life after transplantation, even when the initial recovery has gone well.
What Increases the Risk of Complications?
There is no single factor that determines whether a person will develop complications. Risk can be influenced by several factors, including:
- The severity of the underlying lung disease
- Overall health before transplantation
- Age and physical condition
- The type of transplant performed
- Previous medical conditions
- Immune response to the transplanted lung
- Exposure to infections
- Adherence to immunosuppressive treatment
- Response to surgery and early recovery
The transplant team assesses these factors when planning treatment and follow-up.
Can Lung Transplant Complications Be Prevented?
Not all complications can be prevented, but careful follow-up and adherence to the transplant team's recommendations can reduce avoidable risks and help identify problems early. Important measures include:
- Taking immunosuppressive medicines exactly as prescribed
- Never stopping anti-rejection medicines without medical advice
- Attending scheduled transplant appointments
- Monitoring lung function as recommended
- Reporting new symptoms promptly
- Following infection-prevention measures
- Taking prescribed preventive medicines correctly
- Following recommendations for vaccinations and health screening
*AI-generated image - for illustration only. Clinical accuracy is not guaranteed.
Tell the transplant team about side effects from medicines rather than stopping treatment on your own. The team may be able to adjust the medication plan while continuing to protect the transplanted lung.
The Bottom Line
Lung transplantation is a complex treatment that carries risks both during the operation and throughout long-term recovery. Early complications can include bleeding, infection and primary graft dysfunction, while rejection and airway or vascular problems can affect the transplanted lung during recovery.
Over the longer term, immunosuppressive medicines can contribute to infections, kidney problems, high blood pressure, diabetes, bone loss and an increased risk of certain cancers. Chronic lung allograft dysfunction is another important long-term complication that can cause persistent loss of lung function.
Not every patient will experience these problems, and many complications can be monitored and treated when identified early. Regular follow-up, taking medicines exactly as prescribed and reporting new symptoms promptly are important parts of protecting the transplanted lung and maintaining long-term health.
*AI-generated image - for illustration only. Clinical accuracy is not guaranteed.
