This study investigates the effectiveness of aromatherapy in reducing postoperative nausea and vomiting (PONV) among patients undergoing total joint replacement surgery, as these complications can lead to patient discomfort and prolonged recovery. It is designed as a randomized controlled trial involving 159 participants, who will be divided into three groups: an intervention group receiving aromatherapy patches (lavender-sandalwood or orange-ginger) plus standard care, a placebo group with a placebo patch plus standard care, and a control group receiving standard care alone. PONV will be measured using the Rhodes Index of Nausea, Vomiting, and Retching (RINVR) at baseline, 30 minutes after the intervention, and every 12 hours post-surgery. Additionally, patient satisfaction will be assessed through a 5-point Likert scale survey. The primary outcome of the study is the evaluation of RINVR scores, while the secondary outcome focuses on patient satisfaction levels. Data will be statistically analyzed using two-way ANOVA for repeated measures, with a significance level defined as p \< 0.05. The study aims to determine the viability of aromatherapy as a complementary treatment for PONV, potentially improving postoperative care, enhancing patient satisfaction, and offering a cost-effective alternative to conventional anti emetic treatments if proven effective.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Enrollment
159
Applying aromatherapy patch served as intervention part in addition to standard care. Aromatherapy patch will be attached to the inner side of of the patient's top covered by a plain gauze with micro-pore tape.
On top of standard care. Placebo patch, which looks like the aromatherapy patch but contains no element of any essential oil, will be attached to the inner side of of the patient's top covered by a plain gauze with micro-pore tape.
Prescribed antiemetic treatment
Hong Kong Buddhist Hospital
Wong Tai Sin, Hong Kong, Hong Kong
RECRUITINGPostoperative Nausea and Vomiting
as measured by Rhodes Index of Nausea, Vomiting, and Retching, which consists of 8-item 4-point Likert-scales for nausea, vomiting, and retching symptoms with a total score ranging from 0 to 32 for each time point. The higher scores indicate the higher severity of nausea, vomiting, and retching experienced by the patient.
Time frame: Through study completion, an average of 24 hours at 4 timepoints: T0 (baseline at PACU), T1 (up to 30 minutes from applying intervention to reassessment at PACU), T2 (up to 12-hour post-intervention in ward), T3 (up to 24-hour post-intervention in ward).
Patient Satisfaction
Use of patient satisfaction survey which consists of 2-item 5-point Likert scales to address the extent to which intervention could be effective in discomfort relief and control perceived by patients. The total score of the survey ranged from 2 to 10; the higher the score the more likely patients showed agreement on treatment effectiveness in discomfort relief and control.
Time frame: Through study completion, an average of 24 hours at 4 timepoints: T0 (baseline at PACU), T1 (up to 30 minutes from applying intervention to reassessment at PACU), T2 (up to 12-hour post-intervention in ward), T3 (up to 24-hour post-intervention in ward).
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