Cardiothoracic & vascular anesthesia
Early Respiratory Mechanics and Gas Exchange after Lung Transplantation: Associations with Severe Primary Graft Dysfunction
Authors' conclusion
Severe PGD is associated with early increases in venous admixture, reduced lung compliance, increased dead space, and patterns of collapse.
Study context
- Population
- Adult lung transplant recipients undergoing a decremental positive end-expiratory pressure (PEEP) trial (14, 10, 6 cm H2O) within 12 h after reperfusionenrolled
- Participants
- 47 recipients
- Exposure
- Primary graft dysfunction (PGD) vs non-PGD
- PGDn = 8
- Outcome
- Severe PGD (PaO2/FiO2 <200 mmHg with bilateral infiltrates)
- Follow-up
- 72 h
Methodological detailssingle-centre, decremental PEEP trial, electrical impedance tomography
- Single-centre
- Decremental PEEP trial
- Electrical impedance tomography
Main finding
As reported in the abstract
Severe PGD incidence and early respiratory physiology · within 12 h after reperfusion
Severe PGD incidence and early respiratory physiology · within 12 h after reperfusion PGD 17%
Lung compliance PGD 58 ml/cm H 2 O · non-PGD 80 ml/cm H 2 O
CplRS PGD 37 ml/cm H 2 O · non-PGD 44 ml/cm H 2 O
Qs/QT
Alveolar dead space
- PGD vs non-PGD: P = 0.021
- PGD vs non-PGD: P = 0.038
- PGD vs non-PGD: P < 0.001
- PGD vs non-PGD: P = 0.010
- Greater lung collapse in PGD
- P = 0.015
- More regions with high V/Q ratio in non-PGD
- P = 0.036
- Qs/QT discrimination for PGD development
- AUC 0.92 (95% CI 0.88 to 0.96)
Observational data: associations, not effects.
Further findings
Effect of increasing PEEP in PGD
| Difference (%) (95% CI) | P value | ||
|---|---|---|---|
| Increasing PEEPQs/QT reduced | −6.1 (−9.1 to −3.1) | P = 0.001 | |
| Increasing PEEPCollapse reduced | −19.0 (−27.7 to −10.3) | P = 0.002 | |
| −40−20020Difference, % (linear scale) |
Effect of higher PEEP in non-PGD
| Difference (%) (95% CI) | P value | ||
|---|---|---|---|
| Higher PEEPHyperinflation | 16.2 (13.6–18.8) | P < 0.001 | |
| Higher PEEPPhysiologic dead space increased | 2.9 (1.2–4.6) | P = 0.010 | |
| −1001020Difference, % (linear scale) |
| Difference (ml/cm H 2 O) (95% CI) | P value | ||
|---|---|---|---|
| Higher PEEPCpl RS reduced | −2.9 (−4.8 to −1.0) | P = 0.008 | |
| Higher PEEPChest wall compliance reduced | −25.3 (−41.9 to −8.7) | P = 0.024 | |
| −60−40−20020Difference, ml/cm H 2 O (linear scale) |
| Outcome | PGD | P value |
|---|---|---|
| Lung compliance, PGD vs non-PGDSignificantly lower in PGD | 58 ml/cm H 2 O | P = 0.021 |
| Respiratory system compliance (Cpl RS), PGD vs non-PGDSignificantly lower in PGD | P = 0.038 | |
| Venous admixture (Qs/QT), PGD vs non-PGDElevated in PGD | P < 0.001 | |
| Alveolar dead space, PGD vs non-PGDHigher in PGD | P = 0.010 |
Lung collapse and high V/Q regions, PGD vs non-PGD
- Greater lung collapse in PGD
- P = 0.015
- Non-PGD patients had more regions with high V/Q
- P = 0.036
Effect of increasing PEEP in PGD
- Mechanics not altered
Original publication
Early Respiratory Mechanics and Gas Exchange after Lung Transplantation: Associations with Severe Primary Graft Dysfunction. Anesthesiology. Published 6 May 2026. doi:10.
Composed by AI from the published abstract and checked against it. How Briefs are made →