약 10분간 앙와위 자세를 안정시킨 후 환자의 머리를 검사자와 반대 방향으로 돌린 상태에서 검사를 시행하였다.
After the patient was stabilized in the supine position for approximately 10minutes, the test was performed with the patient's head turned in the opposite direction from the examiner.