Non-Invasive Ventilation Therapy Implementation in Medical Wards-A Scoping Review to Understand Hospitals' Protocols and Procedures.

Background/Objectives: Non-invasive ventilation (NIV) is a highly effective and safe treatment for hypercapnic acute respiratory failure (ARF). This study aimed to identify and examine the content and recommendations within local health guidance documents (LHGDs) that facilitate ward-based implementation of NIV for the treatment of ARF in adults in Australian health services. Methods: A scoping review was conducted on 26 May 2023, updated on 11 January 2024 and 16 September 2025 to identify public health services NIV LHGDs. Data were extracted and analysed regarding NIV initiation, monitoring, maintenance and weaning, and management of clinical deterioration. Results: Twenty-two LHGDs were included, of which only six (27.3%) referenced international NIV guidelines. Most LHGDs (n = 17, 77.3%) required an arterial blood gas (ABG) measurement before NIV initiation, with eight (36.4%) specifying PaCO2 > 45 mmHg and pH < 7.35 as a basis to consider NIV initiation. Most (n = 13, 59.1%) specified a target SpO2 range to monitor NIV, but recommendations varied. NIV implementation recommendations general wards (n = 12, 54.5%) were most common, followed by respiratory wards (n = 5, 22.7%) and respiratory care units (n = 4, 18.2%). Most LHGDs did not specify criteria for medical review (n = 13, 59.1%), clinical escalation (n = 13, 59.1%) or palliation care (n = 13, 59.1%), and weaning guidance was rarely specified (n = 7, 31.8%). Conclusions: There was substantial variation in the structure and content of LHGDs for ward-based NIV across Australian hospitals, including inconsistencies in initiation, monitoring, weaning, and detection of patient deterioration. Variation and limited alignment with major clinical guidelines may impact care quality and safety.