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P-POD

Prone Positioning in Neurologically Deceased Potential Organ Donors to Improve Donor Lung Function and Lung Transplant Recipient Outcomes (P-POD) Pilot Trial

What is P-POD?

The P-POD study is a pilot randomized controlled trial designed to test whether placing neurologically deceased organ donors in the prone position can improve donor lung function and potentially increase the number of lungs suitable for transplantation. Prone positioning may reduce lung injury, improve oxygenation, and decrease inflammation, leading to better transplant outcomes. The study involves applying a structured prone-positioning protocol, maintaining protective mechanical ventilation, monitoring for feasibility metrics and collecting detailed donor and recipient outcome data.

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Why is this important?

Donor lungs are frequently lost due to injury, inflammation, or poor oxygenation following neurological death. Current donor lung utilization rates remain low—only 15–30% of donated lungs are ultimately transplanted. Prone positioning has been shown in clinical and pre-clinical research to improve oxygenation, reduce atelectasis, and mitigate ventilator-induced lung injury. If effective and feasible, the P-POD approach could significantly expand the lung donor pool and improve outcomes for lung transplant recipients.

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What is involved in the study?

The study enrolls 40 neurologically deceased potential lung donors, who are randomized to either prone or supine positioning while receiving the same protective mechanical ventilation strategy. Donors in the prone arm remain prone for ≥16 hours/day until organ procurement. Data collected include ventilator parameters, blood gases, biochemistry, biomarkers, and adverse events. Recipients of study lungs are followed for early post‑transplant outcomes, including graft function, organ support needs, and survival up to 90 days. Feasibility is measured by donor accrual, protocol adherence, and frequency of crossover between arms.

Study Goals

Assess Donor Accrual Feasibility

Determine whether 40 donors can be recruited from 4 sites over 1 year.

Assess crossover rate between treatment arms
Successful if <10% of donors are switched between the prone and supine strategies.
​Assess Adherence to Protocol

Successful if ≥80% of donors have no major protocol violations.

Evaluate logistical feasibility for future full-scale RCT

Assessing operational barriers, timing of randomization, initiation of intervention within required windows, and ability to maintain ≥50% of donor time in assigned positioning.

Study Arms

Intervention Arm: Prone Positioning
  • Donors are placed in the prone position for ≥16 hours/day until organ procurement or decline.

  • Same protective mechanical ventilation as control.

  • Proning interruptions allowed only for predefined safety or clinical reasons.

Control Arm: Supine Positioning
  • Donors remain in the conventional supine position with the head of bed elevated 30–45°.

  • Prone positioning not allowed.

  • Otherwise managed identically with protective mechanical ventilation.

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