Abstract
Endotracheal suctioning did not cause pain in conscious patients when the procedure was performed with the correct catheter in accordance with the guideline. In addition, it can be said that BPS is not sufficient to evaluate pain, but the reason for its high level is because endotracheal suctioning is an uncomfortable procedure. Of course, more studies and further studies are needed for a clear result.It is important for health care professionals to relieve or reduce the pain of patients during the endotracheal aspiration procedure. In addition, the presence and severity of pain associated with the endotracheal aspiration procedure should be accurately measured. This study is registered in ClinicalTrials.gov with the IDNCT04634474.The data that support the findings of this study are available from the corresponding author upon reasonable request.