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Innovative Ways to Reduce Hand-Arm Vibration Level
K K Leung, HKWC M(OSH)
Queen Mary Hospital
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17 May 2017
• Queen Mary Hospital is an 80-year-old building.
• Managing staff expectation effectively.
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1. Our Challenges
Select the Right problem-solving approach
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2. The Journey of Innovation
PDCA Lean Six Sigma: DMAIC
PLAN Define the problem and the objectives Measure the problem Analyze the cause of problem
DO Implement the improvement
CHECK Control the improvement
ACT
Problems • Heavy “traffic” in “limited” floor area.
• Colleagues cannot avoid Tactile Guide Path (TGP), thus the hand-arm vibration, during daily work.
Objective • To minimize the impacts by TGP on daily
operation.
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3. Define the Problems and the Objectives
• Adopt a valid international standard for comparison.
• Measure the hand-arm vibration on pushing trolley and stretcher.
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4. Measure the problems
Current Trolley Stretcher AVG RMS (m/s2) 23.77 32.39 HSE: Exposure limit value of 5.0 m/s2
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5. Analyze the Cause of the Problem: Problem Mapping
New tailor-designed trolley with modified castors.
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5. Analyze the Cause of the Problem: Problem Mapping
Current Trolley (Fig.1) Tailor-Design Trolley (Fig. 2)
AVG RMS (m/s2) 23.77 10.44 HSE: Exposure limit value of 5.0 m/s2
Fig. 2 Tailor-Design Trolley Fig. 1 Current Trolley
New Issues Identified 1. Cost Implication. 2. Time required for
manufacturing.
1. Anti-vibration gloves? • Sharing of gloves. • Issues on hygiene.
2. A cushion? What
material? • Newly developed anti-
vibration polymer (AVP).
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5. Analyze the Cause of the Problem: Problem Mapping
Journey for tailor-made anti-vibration polymer (AVP) handrail/handle cover.
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5. Analyze the Cause of the Problem: Problem Mapping
Current Trolley w/o AVP
Current Trolley w AVP
Tailor-design trolley
Stretcher w/o AVP
Stretcher w AVP
1. AVG RMS (m/s2 )
23.77 17.73 10.44 32.39 12.89
2. Encourage and listen to the feedback from users
4.29 (2nd generation) 5.16 (3rd generation)
3. Promulgation / briefing / expectation management
HSE: Exposure limit value of 5.0 m/s2
• Face to Face interaction for collecting feedback.
• Promulgation during orientation and induction programme for new recruits and other staff training sessions.
• Words of mouth.
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6. Sustain the Improvement
Any alternation in design of hospital facilities may pose new hazards to the staff.
1. Anticipate the hazards.
2. Prepare control measures.
3. Bidirectional communication.
4. Appropriate means to sustain.
5. Caring culture.
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7. What we have Learnt
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What’s next? Patients’ perspective
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