Evaluation of Observational and Behavioural Pain Assessment Tools in Nonverbal Intubated Critically Adult Patients after Open - Heart Surgery: A Systematic Review

Over 70% of patients hospitalised in an intensive care unit (ICU) often experience moderate to severe pain due to pre-existing diseases, trauma, surgery, aggressive procedures, and routine ICU care. Many patients hospitalised in ICU are not able to speak and express their pain due to various causes, including mechanical ventilation, reduced consciousness, and administration of sedative drugs. Therefore, the use of observational and behavioural pain tools is recommended in this group of patients given their inability to express pain