Respiratory failure & ventilation
Inferior vena cava distensibility during pressure support ventilation: a prospective study evaluating interchangeability of subcostal and trans‑hepatic views, with both M‑mode and automatic border tracing
Authors' conclusion
In PSV ventilated patients, we found that IVC-DI calculated with M-mode is not interchangeable with ABT measurements. Moreover, the IVC-DI gathered from SC or TH view produces not comparable results, mainly in terms of precision.
Study context
- Population
- Intensive Care Unit (ICU) patients ventilated in pressure support ventilation (PSV)
- Exposure
- Inferior Vena Cava (IVC) distensibility by M-mode vs automated border tracking (ABT), and subcostal vs trans-hepatic view
- Outcome
- Interchangeability of IVC and distensibility index (DI) measurements by M-mode and ABT across SC and TH views (Bland-Altman mean bias, LoA; Spearman correlation)
Methodological details2 × 2 factorial design
- 2 × 2 factorial design
Main finding
As reported in the abstract
IVC-DI agreement
- ABT vs M-mode · limits of agreement (LoA) −18.4% to 30.2%, ICC = 0.52
- mean bias (SC view) 5.9%
- ABT vs M-mode · LoA −8.0% to 20.4%, ICC = 0.67
- mean bias (trans-hepatic (TH) view) 6.2%
- TH vs SC · LoA −13.7% to 17.5%
- mean bias (M-mode) 1.9%
- TH vs SC · LoA −19.6% to 21.9%
- mean bias (ABT) 1.1%
- Correlation generally suboptimal
- r = 0.43 to 0.60
Observational data: associations, not effects.
Further findings
- IVC visualization success — SC
- 100%
- IVC visualization success — TH view unattainable
- 17.4%
Original publication
Inferior vena cava distensibility during pressure support ventilation: a prospective study evaluating interchangeability of subcostal and trans‑hepatic views, with both M‑mode and automatic border tracing. J Clin Monit Comput. Published 31 May 2024. doi:10.
Composed by AI from the published abstract and checked against it. How Briefs are made →