Noise Unwanted sound PURE SINE TONE Sound level

騷音, Noise 원치 않는 소리 Unwanted sound

PURE SINE TONE

Sound level meter

Noise dosimeter

감각신경성난청 otosclerosis

소리 굽쇠(tuning fork)

Hair cell의 손상

진동의 물리적 성질 • • Displacement : s, mm Velocity : v, cm/sec Acceleration : a, cm/sec 2, d. B Jerk : srms, s root mean square

진동증후군 개론 • Raynaud’s phenomenon: Mauric Raynaud(1862) • Vasular spasm, white finger; Loriga(1911) • TVD(traumatic vasospsdic disease); Wright(1940) • Raynaud’s phenomenon of occupational origin; Agate(1949) • VWF(vibration induced white finger): Industrial advisory council(1970) • Vibration disease; Takamatsu(1976) • Vibration syndrome; Taylor(1974)

a. The staging is made each hand. The final grade of the disorder is indicated by the stage and the number of affected fingers in each hand(e. g. stage/hand/no, of digits)

Screening test - 1 • Vascular Assessment – Adison’s test (neck rotation and deep inspiration) – Allen’s test (compression of vessels at wrist) – Nailbed compression test – Cold provocation test – Doppler test

Screenig Test - 2 • Neurologic Assessment – Light touch (cotton wool) – Pain (pin prick) – Temperature (cold and heat) – Vibration perception threshold – Phalen’s test (wrist flexion) – Tinnel’s test (carpal tunnel percussion)

Screeing Test - 3 • Musculoskeletal Assessment – Grip strength – Pinch test – Manupulative dexterity

Skin thermometer

Finger Tapping Test

Nail Press Test

치료 • Local measure – hot pack, paraffin bath, infrared therapy • Cervical block sympathectomy, ganglion – 장기간에 걸친 결과가 신통치 않음 • Drug – calcium channel blocker(nifedipine), α-blocker(prazocin)