An adjusted and time-saving method to measure collateral ventilation with Chartis.
ERJ Open Res
; 7(3)2021 Jul.
Article
en En
| MEDLINE
| ID: mdl-34322555
ABSTRACT
INTRODUCTION:
Bronchoscopic lung volume reduction with endobronchial valves is an important treatment option in selected patients with severe emphysema and absence of collateral ventilation in the treatment target lobe. The Chartis system provides an important physiological assessment of the presence or absence of collateral ventilation. We aimed to evaluate a new feature and determine whether low flow during a Chartis measurement is predictive for the absence of collateral ventilation, and whether this allows for a procedure to be shortened by earlier terminating the Chartis measurement. This is measured with the "volume trend for the previous 20â s" (VT20).METHODS:
We retrospectively evaluated 249 Chartis assessments of patients scheduled for bronchoscopic lung volume reduction procedures. The VT20 was calculated, and several thresholds were compared between patients with collateral ventilation (CV positive) and without collateral ventilation (CV negative).RESULTS:
100% of the CV negative patients reached a threshold of VT20 ≤6â mL, whereas all CV positive patients reached a VT20 ≥7â mL. The median "time saved" between VT20=6â mL and end of assessment was 60â s (range 5-354â s).CONCLUSION:
The threshold of VT20 ≤6â mL is a reliable method to exclude the presence of collateral ventilation when air flow rates are low and can therefore reduce bronchoscopic lung volume procedure times.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Idioma:
En
Revista:
ERJ Open Res
Año:
2021
Tipo del documento:
Article
País de afiliación:
Países Bajos