Introduction 

DNIV has been shown to be an effective treatment for chronic hypercapnic respiratory failure. Modem technology provides clinicians access to DNIV data.  

Aim  

To retrospectively describe ventilator data from DNIV users admitted to a respiratory ward. 

Methods

Respiratory ward admissions between 01/01/2019 and 31/12/2022 were reviewed for patients on DNIV. Those under other DNIV providers were excluded.  

Demographic data were collected from patient records. DNIV data for 30 days prior to admission were collated including: compliance (average hours on nights used and percentage of nights used ?4 hours), apnoea hypopnoea index (AHI) and mask leak. Compliance was defined as ?4 h/night for ?70% of nights. 

Results 

477 patients admitted requiring NIV. 31.8% (152) were already established on DNIV. 29 patients were under another DNIV provider. 11 patients readmitted within 30 days of the index admission. Data were available for 112 DNIV admissions. Demographics and DNIV data are reported (Table 1 & Table 2).

48.2 (54) patients were non-compliant with NIV prior to admission and 28.5% (32) had interface issues preadmission. 

Conclusion

A high prevalence of non-concordance, and longer LoS, was noted in DNIV users admitted to hospital, emphasising the importance of continued support with NIV concordance.