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Table 3 Maximum inspiratory pressure (MIP) assessment with different devices

From: Equipment review: Measurement of occlusion pressures in critically ill patients

Technique Advantage Disadvantage
MIP: manometer Simple Less precise;
   needs complete
   patient collaboration
MIP: Paw and flow Precise; Requires more
tracing recording with good reproducibility complex equipment;
single effort   needs complete
   patient collaboration
MIP: Paw and flow Precise; Can overestimate
tracing recording feasible in MIP values;
`Marini technique' uncooperative can cause discomfort
  patients to the patient
  1. Paw = airway pressure.