Dennis DM, Duncan CN, Pinder M, Budgeon CA, Jacob WJ. Performance of manual hyperinflation: consistency and modification of the technique by intensive care unit nurses during physiotherapy.
J Clin Nurs 2016;
25:2295-304. [PMID:
27118297 DOI:
10.1111/jocn.13190]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/05/2015] [Indexed: 11/28/2022]
Abstract
AIMS AND OBJECTIVES
To assess the consistency and safety of manual hyperinflation delivery by nurses of variable clinical experience using a resuscitator bag during physiotherapy treatment.
BACKGROUND
Manual hyperinflation involves the delivery of larger than normal gas volumes to intubated patients and is routinely used by nurses in collaboration with physiotherapists for the management of retained sputum. The aim is to deliver slow deep breaths with an inspiratory hold without unsafe airway pressures, lung volumes or haemodynamic changes. In addition, nursing staff should be able to 'feel' differences in resistance and adjust their technique accordingly.
DESIGN
Prospective observational study utilising the simulation of a mechanically ventilated patient.
METHODS
Thirty-three nurses delivered manual hyperinflation to a SimMan3G mannequin who had three distinct lung scenarios applied (normal; asthma; Acute Respiratory Distress Syndrome) in randomised order during simulated physiotherapy treatment. Respiratory rate, tidal volume (Vt ), mean inspiratory flow rate (Vt /Ti), and peak airway pressure data were generated.
RESULTS
Over all scenarios, mean respiratory rate = 12·3 breaths/minute, mean Vt = 638·6 mls, mean inflation time = 1·3 seconds and peak airway pressure exceeded 40 cm H2 O in 41% of breaths, although only in 10% of breaths during the 'normal' lung scenario.
CONCLUSIONS
Experienced nurses were able to manually hyperinflate 'normal' patients in a simulated setting safely. Despite their knowledge of barotrauma, unsafe airway pressures were delivered in some scenarios.
RELEVANCE TO CLINICAL PRACTICE
Training with regard to safe airway pressures, breath hold and adequate volumes is recommended for all nurses undertaking the procedure. Nurses and physiotherapists must closely monitor the patient's condition during manual hyperinflation thereby recognising changes with regard to lung compliance and airway resistance, with nurses responding by altering their technique. The addition of a pressure manometer in the circuit may improve patient safety when performing manual hyperinflation.
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