After being informed about the study and potential risks, all patients giving written informed consent will screening period to determine eligibility for study entry. Patients who meet the eligibility requirements will be randomize in a double-blind manner (participant and researcher) in a 1:1 ratio to experimental group (lemonade ice cubes) or the control group (water ice cubes).
The purpose of this study is to Using saliva stimulation to immediately improve heart failure inpatient's thirst sensation.