Serial ultrasound assessment of diaphragmatic function and clinical outcome in patients with amyotrophic lateral sclerosis

Autor: Riccardo Fantini, Roberto Tonelli, Ivana Castaniere, Luca Tabbì, Maria Rosaria Pellegrino, Stefania Cerri, Francesco Livrieri, Francesco Giaroni, Marco Monelli, Valentina Ruggieri, Nicola Fini, Jessica Mandrioli, Enrico Clini, Alessandro Marchioni
Jazyk: angličtina
Rok vydání: 2019
Předmět:
Zdroj: BMC Pulmonary Medicine, Vol 19, Iss 1, Pp 1-8 (2019)
Druh dokumentu: article
ISSN: 1471-2466
DOI: 10.1186/s12890-019-0924-5
Popis: Abstract Background Diaphragmatic assessment by ultrasound (US) is a non-invasive and useful method in the clinical management of patients with Amyotrophic Lateral Sclerosis (ALS). The aim of our observational study was to evaluate the impact of serial assessment of the diaphragmatic function by US on long-term outcomes in a series of patients suffering from ALS and to correlate US indices of diaphragmatic function and respiratory function tests with these outcomes. Methods A cohort of 39 consecutive patients has been followed up to 24 months. Both lung volume (forced vital capacity, FVC) and diaphragmatic pressure generating capacity (by sniff inspiratory nasal pressure (SNIP) and by both US thickening fraction, ΔTdi, and the ratio of the thickening fraction between tidal volume and maximal lung capacity, ΔTmax) were recorded at baseline and every 3 months. Parameters were then correlated with outcomes (nocturnal hypoventilation, daily hypercapnia, start of ventilatory support (NIV), and death at 1 year) over time. Results The occurrence of ΔTmax > 0.75 increased the risk to start NIV (HR = 5.6, p = 0.001) and to die (HR = 3.7, p = 0.0001) compared with patients maintaining lower values. Moreover, compared with the occurrence of FVC 0.75 appeared slightly better correlated with NIV commencement within 6 months. Conclusions Serial diaphragmatic assessment by ultrasound is a useful and accurate method to predict the initiation of NIV earlier in patients with ALS.
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