Bariatric SurgeryNCT07152054
The Effect of Virtual Forest Bathing on Bariatric Surgery Patients
A study testing virtual forest bathing in people with Bariatric Surgery and Virtual Reality, run by Ataturk University.
Trial summary
This study will be conducted at the General Surgery Clinic of City Hospital in Erzurum between August 2025 and April 2026 using a randomized controlled experimental design. In the power analysis, it was determined that the sample of the study should be 70 patients in total, 35 patients in each group, with a medium… Read more about this study
- Who is it for?
- Any ageHealthy volunteers can take part
- Conditions the study is for
- Bariatric Surgery, Virtual Reality, Anxiety
- What is being tested?
- virtual forest bathing
- Type of treatment
- Medical device
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 70 participants
- Where
- No sites listed yet
- Study dates
- 25 Aug 2025to 25 Aug 2026
- Phase
- Interventional
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages Any age
- All sexes
- Healthy volunteers accepted
- Child, Adult, Older adult
Who may be able to join
- Willingness to participate in the study
- Ability to communicate verbally
- Absence of any psychiatric disorder
- Undergoing bariatric surgery
- No prior experience with virtual forest bathing
Who cannot join
- Inability to establish communication
- Presence of major hearing or visual impairment
- Presence of any condition that may affect decision-making ability (e.g., psychological disorders, dementia)
- Use of medications that may affect cognitive status (e.g., sedatives, antipsychotics)
- Patients who report having previously experienced virtual forest bathing will be excluded from the sample
Trial locations and contacts
No sites are listed yet. Contact the study team or a site near you to ask about taking part.
Zeynep KARAMAN ÖZLÜ, Prof. Dr. contact
About this study
Official title: The Effect of Virtual Forest Bathing on Pain, Anxiety, Fear, Sleep Quality, Vital Signs, and Cortisol Levels in Patients Undergoing Bariatric Surgery: A Randomized Controlled Trial
This study will be conducted at the General Surgery Clinic of City Hospital in Erzurum between August 2025 and April 2026 using a randomized controlled experimental design. In the power analysis, it was determined that the sample of the study should be 70 patients in total, 35 patients in each group, with a medium effect size of 0.5% according to Cohen (42), a margin of error of 0.05%, a confidence interval of 0.95%, and a 95% universe representation power. Patients will be assigned to either the experimental or control groups using a random number generator using a two-block randomization method (random.org). Given that exposure to nature through virtual reality increases physiological arousal and promotes positive mood, the study aimed to evaluate the effects of virtual forest bathing on pre- and postoperative pain, anxiety, fear, sleep, vital signs, and cortisol levels in patients undergoing bariatric surgery.
Read the detailed description
Bariatric surgery is considered an effective method for the treatment of obesity and is increasingly being performed worldwide. While bariatric surgery is an effective method for weight loss and control, the physiological changes caused by excess weight caused by surgical and anesthesia procedures can lead to postoperative complications. Before and after bariatric surgery, uncertainty about the surgical process, concerns about the surgical procedure and anesthesia procedures, and postoperative lifestyle changes and concerns about potential complications all contribute to an increased surgical stress response in obese individuals. Integrating non-pharmacological interventions into the treatment process, rather than focusing solely on pharmacological methods, is crucial. These approaches can be effective in alleviating the physical and psychological symptoms associated with surgery; they can support the recovery process by reducing anxiety and improving sleep quality. Techniques based on distraction, such as virtual reality, music therapy, and breathing exercises, do not produce any side effects, unlike pharmacological agents. These methods also help patients maintain basic physiological parameters such as blood pressure, respiration, and pulse rate, while also contributing to increased comfort and satisfaction. One of these innovative approaches is forest bathing, also known as "Shinrin-yoku," meaning "immersing in the forest atmosphere." Forest bathing utilizes the healing effects of forests to improve health and prevent disease through forest walks. Forest atmospheres are known to contain numerous healing factors that play an important role in the prevention and treatment of health problems through sensory input. There is evidence that forest bathing can help individuals regain attention and foster more positive emotions. Forest environments have positive effects on the cardiovascular system, nervous system, endocrine system, immune system, and mental health. This study was designed considering the need for evidence regarding the pre- and postoperative use of virtual forest bathing in the context of nursing care. It is believed that virtual forest bathing may have positive effects on pain, anxiety, fear, sleep patterns, cortisol, and vital signs in patients undergoing bariatric surgery during the pre- and postoperative periods. Virtual forest bathing has demonstrated successful results in various areas and with different patient groups for reducing stress and anxiety. However, there are limited studies specifically related to bariatric surgery, both in our country and elsewhere. Some studies abroad have shown that such psychological support methods have positive effects on surgical stress, but the number of studies conducted in this area in our country is quite limited. Therefore, this study is valuable in providing scientific data to healthcare professionals in our country. As experimental research on forest bathing intensifies, medical and healthcare professionals have focused on the forest's ability to boost immunity and reduce stress. They have concluded that even short-term forest bathing can help strengthen the body's immune system and improve mood. Implementing holistic, non-pharmacological interventions for patients experiencing both physical and psychological challenges before and after bariatric surgery is crucial. Virtual reality-based nature interventions are considered among the innovative and effective approaches that can be integrated into nursing care during this process. In this context, the study aimed to evaluate the effects of virtual forest bathing on pain, anxiety, fear, sleep patterns, vital signs, and cortisol in patients undergoing bariatric surgery before and after surgery.
- Conditions
- Bariatric Surgery, Virtual Reality, Anxiety
- Being tested
- virtual forest bathing
- Medical subject headings
- Anxiety Disorders
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
virtual forest bathingDevice
Virtual reality (VR) is an advanced computer technology and a novel technique used in healthcare to alleviate pain and provide patient comfort. It enables individuals to interact with a 360-degree virtual environment through a headset device. It has been observed that painful or emotionally stressful stimuli from the external world are diminished within the VR environment, with the individual's attention redirected and focused on this immersive setting.
In our study, a 20-minute VR video will be used, providing the sensation of walking through a calming 360-degree virtual forest environment accompanied by natural sounds, viewed through VR headsets. Unlike some commercially available VR headsets, the Oculus Quest 2 model will be utilized, as it serves as both the computer and display system, eliminating the need for a smartphone. This device is preferred for its ability to deliver high-quality video without interruptions that might negatively affect the VR experience.
After explaining
| Study group | Role | What they receive |
|---|---|---|
| Experimental: Virtual Forest Bathing | Experimental | Patients in the experimental group will undergo the routine surgical procedure implemented in the hospital, and their evaluations will be carried out using the predetermined questionnaires. In addition, they will receive a virtual forest bathing intervention on the evening prior to surgery and on the first postoperative day. On the day of admission for bariatric surgery, the researcher will administer, face-to-face, the Personal Information Form, Surgical Fear Questionnaire, Richard-Campbell Sleep Questionnaire, Visual Analog Scale (VAS) for pain assessment, State-Trait Anxiety Inventory, and the parameter recording form. Following the virtual forest bathing sessions conducted on the evening before surgery and on the first postoperative day, the Surgical Fear Questionnaire, Richard-Campbell Sleep Questionnaire, Visual Analog Scale (VAS), State-Trait Anxiety Inventory, and parameter recording form will be completed again. Receives: Device: virtual forest bathing |
What is being measured
The primary outcome is the main question the study is designed to answer.
Personal Information Form:
This questionnaire, developed by the researcher based on a literature review related to the topic, consists of 16 questions addressing variables such as gender, age, education level, marital status, and previous surgical history.
Measured: up to 24 hours
Surgical Fear Questionnaire (SFQ)
Surgical Fear Questionnaire (SFQ):
Developed by Theunissen et al. in 2014 to assess the fear levels of patients scheduled for surgical procedures, this 8-item Likert-type scale evaluates short-term surgical fears with items 1-4 and long-term surgical fears with items 5-8. Each item is scored on a scale from 0 ("not afraid at all") to 10 ("very afraid"), resulting in a total score ranging from 0 to 80. Higher scores indicate greater levels of surgical fear (Theunissen et al., 2014). The Turkish validity and reliability study conducted by Bağdigen and Özlü (2018) reported a Cronbach's alpha coefficient of 0.93.
Measured: up to 24 hours
Richard-Campbell Sleep Questionnaire (RCSQ)
Developed by Richards in 1987 (Richards, 1987) and adapted into Turkish by Özlü and Özer in 2015 (Özlü \& Özer, 2015), this scale consists of six items evaluating sleep depth, time to fall asleep, frequency of awakenings, time to return to sleep after awakening, sleep quality, and environmental noise level. Each item is scored between 0 and 100. In total score calculation, the sixth item (noise level) is excluded, and scoring is based on the remaining five items. Higher scores indicate better sleep quality. Final scores are calculated by dividing the total score by the number of items. Scores between 0-25 indicate "very poor" sleep quality, while scores between 76-100 indicate "very good" sleep quality.
Measured: up to 24 hours
Visual Analog Scale (VAS)
Developed by Price et al. (1983), this scale measures the intensity of pain using a 10 cm vertical or horizontal line with endpoints labeled as "no pain" (0) and "worst possible pain" (10). The patient marks a point corresponding to their perceived pain intensity, and the distance from the "no pain" end to the marked point is measured in centimeters, representing the pain score. Higher scores indicate greater pain intensity.
Measured: up to 24 hours
State-Trait Anxiety Inventory (STAI-STAII)
It is a test developed by Spielberger et al. that measures state and trait anxiety levels. Its validity and reliability in Turkey was done by Oner and Le Compte. The scale consists of two parts, the 'state anxiety scale', which is created with the aim of determining the instantaneous feelings, and the 20-item 'trait anxiety scale', which was created to determine the feelings in general. It is a four degree scale ranging from 'Nothing' to 'All'. Scores range from 20 (low anxiety) to 80 (high anxiety).
Measured: up to 24 hours
Tracking Form for Parameters
Before and after bariatric surgery, patients' heart rate, blood pressure, and oxygen saturation will be measured and recorded in this form. In addition, to assess stress levels, blood cortisol measurements will be performed. Blood samples for cortisol will be collected in the morning (between 07:30-08:30) in appropriate tubes, promptly transported to the laboratory, and analyzed under cold chain conditions. Serum or plasma will be separated and analyzed using standard devices. All procedures will be carried out in the Erzurum City Hospital laboratory according to existing standard protocols and high-quality criteria, and results will be recorded.
Measured: up to 24 hours
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted3 Sep 2025
- Study start25 Aug 2025 (estimated)
- Primary completion25 Dec 2025 (estimated)
- Study completion25 Aug 2026 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Bariatric SurgeryStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Supportive care
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Enrolment
- 70 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Ataturk University
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Muazzez Merve TORAMAN, Ataturk University
- Investigators
- Muazzez Merve TORAMAN, Principal investigator, Atatürk Üniversity
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07152054
- Sponsor's protocol ID
- Muazzez TORAMAN
- Status last verified
- Aug 2025
- First submitted
- 10 Aug 2025
- Last updated
- 3 Sep 2025
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Study at a glance
From the registry record, last updated by the sponsor on 3 Sep 2025. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- The Effect of Virtual Forest Bathing on Pain, Anxiety, Fear, Sleep Quality, Vital Signs, and Cortisol Levels in Patients Undergoing Bariatric Surgery: A Randomized Controlled Trial
- ClinicalTrials.gov ID
- NCT07152054
- Acronym / sponsor ID
- Muazzez TORAMAN
- Conditions
- Bariatric Surgery, Virtual Reality, Anxiety
- Study type
- Interventional
- Recruitment status
- Not yet recruiting
- Enrolment
- 70 participants (estimated)
- Lead sponsor
- Ataturk UniversityUniversity, hospital or other
- Study start
- 25 Aug 2025 (estimated)
- Primary completion
- 25 Dec 2025 (estimated)
- Study completion
- 25 Aug 2026 (estimated)
- First posted
- 3 Sep 2025 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This study will be conducted at the General Surgery Clinic of City Hospital in Erzurum between August 2025 and April 2026 using a randomized controlled experimental design. In the power analysis, it was determined that the sample of the study should be 70 patients in total, 35 patients in each group, with a medium effect size of 0.5% according to Cohen (42), a margin of error of 0.05%, a confidence interval of 0.95%, and a 95% universe representation power. Patients will be assigned to either the experimental or control groups using a random number generator using a two-block randomization method (random.org). Given that exposure to nature through virtual reality increases physiological arousal and promotes positive mood, the study aimed to evaluate the effects of virtual forest bathing on pre- and postoperative pain, anxiety, fear, sleep, vital signs, and cortisol levels in patients undergoing bariatric surgery.
Detailed description
Bariatric surgery is considered an effective method for the treatment of obesity and is increasingly being performed worldwide. While bariatric surgery is an effective method for weight loss and control, the physiological changes caused by excess weight caused by surgical and anesthesia procedures can lead to postoperative complications. Before and after bariatric surgery, uncertainty about the surgical process, concerns about the surgical procedure and anesthesia procedures, and postoperative lifestyle changes and concerns about potential complications all contribute to an increased surgical stress response in obese individuals. Integrating non-pharmacological interventions into the treatment process, rather than focusing solely on pharmacological methods, is crucial. These approaches can be effective in alleviating the physical and psychological symptoms associated with surgery; they can support the recovery process by reducing anxiety and improving sleep quality. Techniques based on distraction, such as virtual reality, music therapy, and breathing exercises, do not produce any side effects, unlike pharmacological agents. These methods also help patients maintain basic physiological parameters such as blood pressure, respiration, and pulse rate, while also contributing to increased comfort and satisfaction. One of these innovative approaches is forest bathing, also known as "Shinrin-yoku," meaning "immersing in the forest atmosphere." Forest bathing utilizes the healing effects of forests to improve health and prevent disease through forest walks. Forest atmospheres are known to contain numerous healing factors that play an important role in the prevention and treatment of health problems through sensory input. There is evidence that forest bathing can help individuals regain attention and foster more positive emotions. Forest environments have positive effects on the cardiovascular system, nervous system, endocrine system, immune system, and mental health. This study was designed considering the need for evidence regarding the pre- and postoperative use of virtual forest bathing in the context of nursing care. It is believed that virtual forest bathing may have positive effects on pain, anxiety, fear, sleep patterns, cortisol, and vital signs in patients undergoing bariatric surgery during the pre- and postoperative periods. Virtual forest bathing has demonstrated successful results in various areas and with different patient groups for reducing stress and anxiety. However, there are limited studies specifically related to bariatric surgery, both in our country and elsewhere. Some studies abroad have shown that such psychological support methods have positive effects on surgical stress, but the number of studies conducted in this area in our country is quite limited. Therefore, this study is valuable in providing scientific data to healthcare professionals in our country. As experimental research on forest bathing intensifies, medical and healthcare professionals have focused on the forest's ability to boost immunity and reduce stress. They have concluded that even short-term forest bathing can help strengthen the body's immune system and improve mood. Implementing holistic, non-pharmacological interventions for patients experiencing both physical and psychological challenges before and after bariatric surgery is crucial. Virtual reality-based nature interventions are considered among the innovative and effective approaches that can be integrated into nursing care during this process. In this context, the study aimed to evaluate the effects of virtual forest bathing on pain, anxiety, fear, sleep patterns, vital signs, and cortisol in patients undergoing bariatric surgery before and after surgery.
Study design
- Primary purpose
- Supportive care
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Experimental: Virtual Forest Bathing | Experimental | Device: virtual forest bathingPatients in the experimental group will undergo the routine surgical procedure implemented in the hospital, and their evaluations will be carried out using the predetermined questionnaires. In addition, they will receive a virtual forest bathing intervention on the evening prior to surgery and on the first postoperative day. On the day of admission for bariatric surgery, the researcher will administer, face-to-face, the Personal Information Form, Surgical Fear Questionnaire, Richard-Campbell Sleep Questionnaire, Visual Analog Scale (VAS) for pain assessment, State-Trait Anxiety Inventory, and the parameter recording form. Following the virtual forest bathing sessions conducted on the evening before surgery and on the first postoperative day, the Surgical Fear Questionnaire, Richard-Campbell Sleep Questionnaire, Visual Analog Scale (VAS), State-Trait Anxiety Inventory, and parameter recording form will be completed again. |
Who may qualify
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Child, Adult, Older adult
Key inclusion criteria (5 listed)
- Willingness to participate in the study
- Ability to communicate verbally
- Absence of any psychiatric disorder
- Undergoing bariatric surgery
- No prior experience with virtual forest bathing
Key exclusion criteria (5 listed)
- Inability to establish communication
- Presence of major hearing or visual impairment
- Presence of any condition that may affect decision-making ability (e.g., psychological disorders, dementia)
- Use of medications that may affect cognitive status (e.g., sedatives, antipsychotics)
- Patients who report having previously experienced virtual forest bathing will be excluded from the sample
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| virtual forest bathingVirtual reality (VR) is an advanced computer technology and a novel technique used in healthcare to alleviate pain and provide patient comfort. It enables individuals to interact with a 360-degree virtual environment through a headset device. It has been observed that painful or emotionally stressful stimuli from the external world are diminished within the VR environment, with the individual's attention redirected and focused on this immersive setting. In our study, a 20-minute VR video will be used, providing the sensation of walking through a calming 360-degree virtual forest environment accompanied by natural sounds, viewed through VR headsets. Unlike some commercially available VR headsets, the Oculus Quest 2 model will be utilized, as it serves as both the computer and display system, eliminating the need for a smartphone. This device is preferred for its ability to deliver high-quality video without interruptions that might negatively affect the VR experience. After explaining | Device | Experimental: Virtual Forest Bathing |
Primary outcome
Personal Information Form:
Time frame: up to 24 hours
This questionnaire, developed by the researcher based on a literature review related to the topic, consists of 16 questions addressing variables such as gender, age, education level, marital status, and previous surgical history.
Surgical Fear Questionnaire (SFQ)
Time frame: up to 24 hours
Surgical Fear Questionnaire (SFQ): Developed by Theunissen et al. in 2014 to assess the fear levels of patients scheduled for surgical procedures, this 8-item Likert-type scale evaluates short-term surgical fears with items 1-4 and long-term surgical fears with items 5-8. Each item is scored on a scale from 0 ("not afraid at all") to 10 ("very afraid"), resulting in a total score ranging from 0 to 80. Higher scores indicate greater levels of surgical fear (Theunissen et al., 2014). The Turkish validity and reliability study conducted by Bağdigen and Özlü (2018) reported a Cronbach's alpha coefficient of 0.93.
Richard-Campbell Sleep Questionnaire (RCSQ)
Time frame: up to 24 hours
Developed by Richards in 1987 (Richards, 1987) and adapted into Turkish by Özlü and Özer in 2015 (Özlü \& Özer, 2015), this scale consists of six items evaluating sleep depth, time to fall asleep, frequency of awakenings, time to return to sleep after awakening, sleep quality, and environmental noise level. Each item is scored between 0 and 100. In total score calculation, the sixth item (noise level) is excluded, and scoring is based on the remaining five items. Higher scores indicate better sleep quality. Final scores are calculated by dividing the total score by the number of items. Scores between 0-25 indicate "very poor" sleep quality, while scores between 76-100 indicate "very good" sleep quality.
Visual Analog Scale (VAS)
Time frame: up to 24 hours
Developed by Price et al. (1983), this scale measures the intensity of pain using a 10 cm vertical or horizontal line with endpoints labeled as "no pain" (0) and "worst possible pain" (10). The patient marks a point corresponding to their perceived pain intensity, and the distance from the "no pain" end to the marked point is measured in centimeters, representing the pain score. Higher scores indicate greater pain intensity.
State-Trait Anxiety Inventory (STAI-STAII)
Time frame: up to 24 hours
It is a test developed by Spielberger et al. that measures state and trait anxiety levels. Its validity and reliability in Turkey was done by Oner and Le Compte. The scale consists of two parts, the 'state anxiety scale', which is created with the aim of determining the instantaneous feelings, and the 20-item 'trait anxiety scale', which was created to determine the feelings in general. It is a four degree scale ranging from 'Nothing' to 'All'. Scores range from 20 (low anxiety) to 80 (high anxiety).
Tracking Form for Parameters
Time frame: up to 24 hours
Before and after bariatric surgery, patients' heart rate, blood pressure, and oxygen saturation will be measured and recorded in this form. In addition, to assess stress levels, blood cortisol measurements will be performed. Blood samples for cortisol will be collected in the morning (between 07:30-08:30) in appropriate tubes, promptly transported to the laboratory, and analyzed under cold chain conditions. Serum or plasma will be separated and analyzed using standard devices. All procedures will be carried out in the Erzurum City Hospital laboratory according to existing standard protocols and high-quality criteria, and results will be recorded.
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 3 Sep 2025.
- Individual participant dataSharing planned: No
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
Zeynep KARAMAN ÖZLÜ, Prof. Dr. contact
Muazzez Merve TORAMAN principal investigator
Atatürk Üniversity
Questions about this trial
What is this clinical trial studying?
A study testing virtual forest bathing in people with Bariatric Surgery and Virtual Reality, run by Ataturk University.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 5 inclusion and 5 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: opening soon, as of the sponsor's last update on 3 Sep 2025. Status can change between updates, so confirm with the study contact before making plans.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
Contact Muazzez Merve TORAMAN (05548307383, lalemervetoraman@gmail.com), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Personal Information Form: (time frame: up to 24 hours). The study lists 6 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 3 Sep 2025; AzTrials last refreshed its copy on 26 Oct 2026.