{"id":33,"date":"2020-11-10T19:58:42","date_gmt":"2020-11-10T19:58:42","guid":{"rendered":"http:\/\/engprojects.tcnj.edu\/dvt-detection\/?p=33"},"modified":"2020-11-10T19:58:42","modified_gmt":"2020-11-10T19:58:42","slug":"hazard-analysis","status":"publish","type":"post","link":"https:\/\/engprojects.tcnj.edu\/dvt-detection\/2020\/11\/10\/hazard-analysis\/","title":{"rendered":"Hazard Analysis"},"content":{"rendered":"\n

1) Severity table used for risk assessment \u2013 with score definitions <\/p>\n\n\n\n

Severity Table<\/p>\n\n\n\n

Rating<\/td>Severity of Effect<\/td>Future consequences<\/td>Treatment<\/td><\/tr>
10<\/td>Death<\/td>–<\/td>–<\/td><\/tr>
9<\/td>Cardiac Arrest<\/td>Cardiac Tissue Damage<\/td>Use a Defibrillator  <\/td><\/tr>
8<\/td>Arthymea<\/td>Unstable Heart Rate<\/td>Reset heart rhythm<\/td><\/tr>
7<\/td>Pulmonary Embolism<\/td>Lung cell death<\/td>Lung surgery<\/td><\/tr>
6<\/td>Severe Skin Burns<\/td>Permanent tissue damage, scarring<\/td>Burn treatment, and surgeries<\/td><\/tr>
5<\/td>DVT Formation<\/td>Vessel Damage<\/td>Anticoagulant medication <\/td><\/tr>
4<\/td>Mild Skin Burns<\/td>Tissue Damage, Scarring<\/td>Burn treatment, <\/td><\/tr>
3<\/td>Skin Burns from electric shocks<\/td>Tissue damage<\/td>Heals over time.<\/td><\/tr>
2<\/td>Severe Skin Irritation<\/td>Long Lasting Discomfort<\/td>Remove Irritant, Cortical Lotion  <\/td><\/tr>
1<\/td>Mild Skin Irritation<\/td>Mild Discomfort <\/td>Remove Irritant<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

2) Occurrence table used for risk assessment \u2013 with score definitions <\/p>\n\n\n\n

Rating<\/td>Probability of Occurrence<\/td><\/tr>
10<\/td>Happening every use<\/td><\/tr>
9<\/td>Happening every other user<\/td><\/tr>
8<\/td>1 in 5<\/td><\/tr>
7<\/td>1 in 10<\/td><\/tr>
6<\/td>1 in 50<\/td><\/tr>
5<\/td>1 in 100<\/td><\/tr>
4<\/td>1 in 500<\/td><\/tr>
3<\/td>1 in 1000<\/td><\/tr>
2<\/td>1 in 5000<\/td><\/tr>
1<\/td>Inconceivable<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

3) RPN table used for risk classification <\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

4) Hazard and risk assessment spreadsheet \u2013 with score justifications <\/p>\n\n\n\n

Hazard<\/td>Chain of Events<\/td>Hazardous situation<\/td>Potential Harms<\/td>Severity<\/td>Probability<\/td>Risk<\/td><\/tr>
Battery Explosion<\/td>Overtaxed power supply, Overheated Battery, failure of battery controller. Batteries get wet<\/td>Battery incineration <\/td>Skin burns<\/td>Serious  (6)<\/td>Improbable(1) <\/td>R2<\/td><\/tr>
Electric shock



<\/td>		Circuit malfunction, Circuits get wet, Physical damage to device creates open circuit.<\/td>Electric shock<\/td>Skin burns<\/td>Minor(3)<\/td>Improbable(1)<\/td>R1<\/td><\/tr>
Skin irritation<\/td>LED lights react to skin, camera reacts to skin, rough material to the skin<\/td>Reaction between the skin and some parts of the device<\/td>Reddening and inflammation, which Skew the results<\/td>Negligible (1)<\/td>Occasional (6)<\/td>R2<\/td><\/tr>
Wrong data collection – O2 levels<\/td>Device disconnects from Oximiter.<\/td>Low O2<\/sub> stats present without detection<\/td>DVT Formation, Pulmonary Embolism, Vessel Damage<\/td>Critical (7)<\/td>Improbable(1)<\/td>R2<\/td><\/tr>
Wrong data collection – inflammation levels<\/td>Device Dysfunction inflammation<\/td>Inflammation without detection<\/td>DVT Formation, Pulmonary Embolism, Vessel Damage<\/td>Critical(7)<\/td>Improbable (1)<\/td>R2<\/td><\/tr>
LED Burns<\/td>Arduino malfunctions increase the time of LED light exposure <\/td>High temperature<\/td>Damages skin<\/td>Negligible (1)<\/td>Improbable (1)<\/td>R1<\/td><\/tr>
Cut blood circulation<\/td>Device is too tight, device is too small for the user to use<\/td>Reduction in blood circulating to lower extremities<\/td>Increase vessel damage and clotting<\/td>Critical (7)<\/td>Remote(3)<\/td>R2<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

5) Mitigation, as needed<\/p>\n\n\n\n

Hazard<\/td>Mitigation technique<\/td><\/tr>
Battery Explosion<\/td>Microcontroller that checks voltage overshoot and shuts off power. <\/td><\/tr>
Electric shock<\/td>Ground the device, Protect the device circuits from water<\/td><\/tr>
Skin irritation<\/td>Instruct medical practitioners to check with patients for any discomfort regularly. <\/td><\/tr>
LED Burns<\/td>The frequency of what we measure will depend on the time the LED takes to cool down to room temperature.<\/td><\/tr>
Cut blood circulation<\/td>Instruct medical practitioners on proper technique to tighten and secure device fittings.<\/td><\/tr><\/tbody><\/table><\/figure>\n","protected":false},"excerpt":{"rendered":"

1) Severity table used for risk assessment \u2013 with score definitions  Severity Table Rating Severity of Effect Future consequences Treatment 10 Death – – 9 Cardiac Arrest Cardiac Tissue Damage Use a Defibrillator   8 Arthymea Unstable Heart Rate Reset heart rhythm 7 Pulmonary Embolism Lung cell death Lung surgery 6 Severe Skin Burns Permanent tissue … <\/p>\n

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