An interventional study of Auriculotherapy in Anxiety, sponsored by Universidade do Porto. Completed at 1 site in Portugal. Open to participants aged 18 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2022-11-03.
Sponsored by Universidade do Porto · Not applicable, Interventional, and Treatment
As the investigators have shown before, there was a tendency for a reduction of anxiety levels on university students after 30 minutes, with auriculotherapy treatment before examinations have started. However, the effect was effective and clinically significant after 48 hours comparing auriculotherapy with placebo and no treatment. In this sense, the investigators intend to perform a new study with a large sample and introduce a new hypothesis. So, this study aims to detect the clinical effect of two auriculotherapy techniques on the anxiety levels of university students.
To treat anxiety, conventional medicine relies on medicines such as benzodiazepines, antidepressants, barbiturates, and antihistamines. However, several authors have reported western medicine cannot resolve all anxiety diseases and the risk of side effects, resistance to pharmacological treatments affects approximately one in three patients with anxiety disorders.
Alternatively, auriculotherapy is a technique similar to reflexology. It is speculated the technique might work in anxiety because groups of pluripotent cells contain information from the whole organism creating regional organization centres representing different parts of the body, through the recruitment of more cortex cells dedicated to specific body areas. Thus reflex points in the ear can incite body responses by the stimulation of reticular formation and the sympathetic and parasympathetic nervous systems. The information that comes from the thermal, Algic and proprioceptive stimuli are transmitted from the auricular pavilion by the fibres of the nerves: trigeminal; Auricular magnum and minor occipital (sensitive branch of the cervical plexus) and the vagus nerve. The vagus nerve is responsible for the parasympathetic innervation of the lung, heart, stomach, and small intestine, as well as the pharynx and larynx muscles and it also sends information to important brain regions (e.g., locus coeruleus, orbitofrontal cortex, hippocampus and at amygdala) in the regulation of anxiety. In turn, the trigeminal nerve controls, mainly, the mastication muscles and the facial sensitivity while the cervical plexus nerve is responsible for neck muscles, diaphragm, and thorax.
4,868 studies on the registry are indexed under Anxiety Disorders; 1,390 are open to participants now.
This study's enrollment of 26 is below the median of 80 across 4,174 interventional studies indexed under Anxiety Disorders.
Browse Anxiety Disorders studies →Universidade do Porto is the lead sponsor of 170 studies on the registry; 52 are open to participants now.
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Exclusion Criteria:
Indwelling fixed semipermanent needles embedded in a skin-colored adhesive tape will be used in active points around the vagus nerve stimulation area.
Other: Auriculotherapy
No auriculotherapy will be applied.
A licensed acupuncturist (holder of civil liability insurance) with more than nine years of experience with this technique will apply auriculotherapy. Indwelling fixed semipermanent needles embedded in a skin-coloured adhesive tape will be used at the actives auricular points around the vagus nerve area.
Change on Spielberger's State-Trait-Anxiety Inventory (STAI)
Was developed by Spielberger and colleagues in 1970, validated for the Portuguese population, with the aim of analyzing anxiety symptoms. STAI is an instrument for measuring the state and trait of anxiety, consisting of two auto-answer questionnaires, each consisting of 20 items. The score ranges from 20 to 80 points on both scales, where 20 to 35 points means not anxious, 36 to 50 points is considered little anxious; 51 to 65 points means moderately anxious; and finally, 66 to 80 points the participant is considered very anxious.
Time frame: Change from baseline to after 8 and 24 hours.
Change on Salivary amylase (U/ml)
The method responds to both pancreatic and salivary amylase isoenzymes. Samples will be diluted prior to analysis and all measurements are going to be in compliance with the national legal requirements.
Time frame: Change from baseline to after 16 hours.
Change on Visual analogic scale (VAS) for anxiety
Consists of a horizontal or vertical line, 100 mm long, which has marked the classification "totally calm and relaxed" at one end and, at the other, the classification "Worst fear imaginable". The respondent should mark the point that represents the degree of intensity of his anxiety. The distance between the beginning of the line, which corresponds to zero and the marked location, is then measured in centimeters, thus obtaining a numerical classification. The scale is reliable and correlated with STAI-Y1 (p \<0.0001) for the level of anxiety and was used on our previous study
Time frame: Change from one week before baseline to after 8 and 24 hours.
Change on quality of sleep
The participants will be asked about the quality of sleep during the night before as: 1-no change, 2-better or 3- worse than the quality of sleep during the previous week.
Time frame: Change from one week before baseline to after 8 and 24 hours.
Change on Blood Glucose levels
Cortisol acts on two distinct fronts that results in increased amounts of glucose in the bloodstream. It stimulates gluconeogenesis in the liver, and the glucose produced is released into the bloodstream and stored as glycogen. In addition, by potentiating the effects of epinephrine, it elevates glycogenolysis in the liver, thus releasing a large amount of glucose into the bloodstream within minutes.
Time frame: Change from baseline to after 30 minutes and 24 hours.
Test performance
After the exam, the test performance (pass or fail) will also be recorded.
Time frame: one week after examinations
Adverse effects
We will collect data related to auriculotherapy´ adverse effects (e.g, pain, presence of hematoma, vagal reaction, and infection), by replying the Adverse effect questionnaire after the procedure, as well as 1 week after completion of the experimental session.
Time frame: up to one week after baseline
Plan to share: No — Results can be disseminated through workshops or seminars, or newsletters, to reach the largest number of people. Among educational institutions, a workshop can be held on the importance of implementing strategies to reduce situational anxiety. Communications could be whispered at scientific meetings and publications in journals to contribute about auriculotherapy effects, physiologic mechanisms and safety.
This study is completed, as verified in Oct 2022. You cannot join it, but the record below documents what was studied.
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Universidade do Porto