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Changes in lung vascular permeability after heart-lung transplantation
The Journal of Surgical Research
|October 1, 1985
Summary
Multiple indicator dilution techniques assessed lung vascular permeability in heart-lung transplant patients. Elevated urea permeability-surface area product (PS) in one patient indicated severe microvascular injury, possibly due to rejection.
Area of Science:
- Pulmonary Medicine
- Transplantation Immunology
- Cardiovascular Physiology
Background:
- Heart-lung transplantation is a complex procedure with risks of lung injury.
- Assessing lung microvascular integrity is crucial for post-transplant management.
Purpose of the Study:
- To evaluate lung vascular permeability using multiple indicator dilution (MID) techniques in heart-lung transplant recipients.
- To correlate permeability-surface area product (PS) for urea with clinical outcomes and potential complications like rejection.
Main Methods:
- Employed multiple indicator dilution (MID) techniques in six heart-lung transplant patients.
- Measured serial permeability-surface area product (PS) for urea, normalized to total lung capacity (TLC).
Main Results:
- PS values varied significantly among patients, with one patient exhibiting values exceeding the lethal range for severe ARDS.
- This elevated PS in one patient suggested severely increased lung microvascular permeability, potentially linked to rejection.
- PS values in surviving patients remained below the ARDS lethal threshold.
Conclusions:
- PS urea derived from MID effectively indicates lung microvascular integrity status in heart-lung transplant recipients.
- This method can help identify patients at risk for severe lung injury or complications post-transplant.