NIPH Clinical Trials Search

A study to evaluate the effects of Kanshoho for people with chronic whiplash_associated disorder(WAD)

Basic Information

Recruitment status	Recruiting
Health condition(s) or Problem(s) studied	Sequelae of Cervical Sprain (Chronic Whiplash-Associated Disorder)
Date of first enrollment	16/07/2025
Target sample size	10
Countries of recruitment
Study type	Interventional
Intervention(s)	Manual therapy (Kanshoho) A single-session manual relaxation technique targeting skeletal muscles and tendons. The therapist applies approximately 500 g of perpendicular finger pressure to the muscle, repeating 2-second contraction and 2-second extension cycles for up to 20 minutes (the session ends earlier if pain disappears). Evaluations include pain (VAS), cervical range of motion (ROM), and ultrasound findings before and after the intervention.

Outcome(s)

Primary Outcome

Change in pain intensity (VAS score) before and after the intervention. Pain intensity is assessed using a 100-mm visual analogue scale (VAS) by a physician, and the difference between pre- and post-intervention scores is used as the primary outcome. Time frame: Pre- and post-intervention (same day).

Secondary Outcome

1.Change in cervical range of motion (ROM)_flexion, extension, rotation, and lateral flexion, measured according to the 1995 criteria of the Japanese Orthopaedic Association and Japanese Association of Rehabilitation Medicine. 2.Changes in ultrasound findings_morphological alterations and echo intensity of the muscles and tendons at the treated sites. 3.Duration of intervention_time (minutes) required until pain disappearance (maximum 20 min). Time frame: Pre- and post-intervention (same day).

Key inclusion & exclusion criteria

Age minimum	>= 20age old
Age maximum	Not applicable
Gender	Both
Include criteria	1. Patients with whiplash-associated disorder (WAD) whose symptoms have persisted for more than 6 months without organic abnormalities. 2. Outpatients of *Shin Orthopedic Rehabilitation & Sports Clinic* who provide written informed consent to participate. 3. Judged eligible for participation by the attending physician.
Exclude criteria	* Patients currently undergoing treatment for underlying diseases. * Individuals deemed unsuitable by the attending physician due to excessive physical or mental burden. * Individuals judged inappropriate by the principal investigator. * Employees and family members of the Japan Health Organization or Shin Orthopedic Rehabilitation & Sports Clinic.