Repetitive stress injuries (RSIs) result from using the body continuously in ways it was not designed to work.RSIs have appeared in office workers who spend a lot of time using the computer keyboard and mouse
What causes RSI?
that may run up the hand into the wrist and arm
The forearm flexor tendons and a few nerves pass through a small tunnel formed by the wrist bones, or carpals, into the hand. As you move you hands and fingers, the flexor tendons rub against the sides of the tunnel, sometimes causing them to swell and push the median nerve. When the median nerve is pushed by the tendons, we feel pain.It is caused by typing for extended period ending up in swelling of muscles that pinches the nerves in a hand and fingers
causing eyestrain : luminance, contrast, reflections on screen,
Many people find a low monitor tobe more comfortable for eyes and neck, Wear protective eye glasses , Adjust the brightness of your screen
Now it becomes equals to drugs and cigrates.
Computer and internet are doors to vast information access and excellent means of entertainment, communication and networking. But that virtual medium should NEVER rip you off from the real world. Take Care!!
We all will become murli because either our fingers or wrist get twisted, then we cannot do anything expect for turning ballThin people will become fat by having an internet addiction.
Ergonomics, the "science of work," is a field of technology that considers human capabilities and limitations in the design of machines and objects that people use, the work processes that they must follow, and the environments in which they operate
tilt it slightly forward to alleviate any knee pressure.
computer related health hazards
Computer Related Health Hazards PRESENTED BY:- VISHAL CHATURANI BSc engg. d,ayalbagh educational institue
Others names for RSI• Work related upper limb disorder(WHO)• Occupational overuse syndrome(NZ)• Cumulative trauma disorder(USA)• Computer related injuries(CSI)
RSI Facts and figures• OSHA estimates over 7000,000 RSI’s occur every year.• 15-20% of computers users throughout the world may have estimated RSI .• 3 out of 5 office workers in Sweden have symptoms of RSI.• Every day 6 people in uk have to leave their job due to RSI
DID YOU KNOW?• 75% of Indian computers users report pain/numbness• Over 30 young Indians IT/ITES professionals have lost their jobs because of advanced RSI• 55% of Indian computer users got injured within a year of starting their first job
A dangerous occupation: This is also dangerous: As a typical computer user, you “walk” several miles each day on your fingertips (250 keystrokes / min) * (2 in / keystroke) * 4 hours = 2 miles
What is RSI? Repetitive Strain Injury (RSI) is pain or nerve problems in upper extremity (hands, arms, or shoulders) can also include neck and back is a soft tissue disease (muscles and nerves) is an overuse syndrome Symptoms: tightness, discomfort, stiffness, soreness or burning in the hands, wrists, fingers, forearms, or elbow. pain that wakes you up at night; tingling, coldness or numbness in the hands, and loss of strength and coordination in the hands
Repetition Of Tasks Too Much Stress Other softMuscles Tendons Nerves tissues RSI
(CTS) is caused when median nerves that controls the functioning of the hands and fingers become compressed inside a “tunnel” made up of the wrist bones, or carpals. Median Nerve Compressed Free Powerpoint Templates Page 12
Symptoms of CTS injury• Pain and discomfort• Numbness and coldness in the hands• Loss of strength and/or joint movement• Swelling and stiffness in the hands• The need to massage your hands, wrists and arms• Heaviness & even disturbs sleep.
Reasons for CTS injury Long hours in the keyboard, especially those that type more than four hours Lack of circulation in the muscles that prevents nutrients and oxygen to reach the tissues Inadequate rest and breaks Poor posture including the sitting, placement of hands on the keyboard and proper height of the keyboard Poor diet (lack of vitamins)
CTS Treatment• Rest, rest and more rest• Use of a wrist brace or splint• Take medication like ibuprofen• Take vitamins• Keep hands warm, take breaks, exercise your hands and arms• Use your knowledge of ergonomics• Surgery should be your last retreat if everything else fails
Eye Strains• Eye strain is the single largest complaint of computer users causing soreness, irritation, blurred vision, redness and dryness of the eyes. Page 17
Reasons for this injury Bad monitor resolution, flickering, or glare at the monitor Poor lighting conditions in the computer room distance between eye and screen readability of the screen Electromagnetic radiation emitted by the CRT (UVA) Staring at anything for a long period of time. Loss of negative ions in the atmosphere due to electrostatic charges on the face of the CRT
Symptoms of Eye Strains Impaired vision, double vision and blurred vision Difficulty in looking at one point for a period of time Itchy dry eyes and discomfort while looking at the VDT Headaches Eye fatigue that can have serious impact later in life watering and other sensations are eye problems associated with computer maneuverings
Eye Strain Treatment Use your knowledge of ergonomics Take breaks when you feel strained Use your laptop when possible because the monitor emits less radiation Use a monitor that holds a steady image without flickering. Use the zooming function to improve readability The screen should be kept 18-30 inches from ones eyes or about an arm’s length.
Internet Addiction• Use Internet every day without days off• Loosing track of time while surfing the Net.• Denial of high usage.• 51% of Internet addicts suffer severe job impairment• 58% get addicted within the first 12 months of Internet usage• Web addicts display similar brain changes to those addicted to drugs or alcohol.
Discomgoogolatio n • It is defined as feeling of distress or anxiety when unable to gain immediate information access. • Derived from “discombobulate” which means illusion and ”Google” • The internet users suffer from distress or anxiety when unable to get connected to the Internet. • They felt frustrated and confused whilst unable to get online. • Some had higher stress levels.
Use internet only when necessary. Try to have account on only one of the social networking sites. Indulge in other hobbies. Take care of time while chatting. If still suffered by online mania ,consult psychologist. There is even an anti-facebookblog called sickfacebook.com to discuss issues.
Stress and Depression• Computer operators experience more stress than any other occupational group the National Institute of Occupational Safety and Health has studied Page 25
Other Computer Related Health Hazards Back problems (pain) caused from the efforts of the muscle to hold your posture for long periods of time Skin rashes that are caused from the static fields in front of the screen causing ions and pollutants in the air to become positively charged and attach themselves to your negatively charged skin (especially in low humidity) Abnormal reproductive outcomes due to electromagnetic radiations affects on biological functions and biochemical processes inside our cells Cancer and leukemia (?) Skin aging (?)
The required adjustability to achieve an ergonomically correct computer workstation1. The top of your monitor should be at eye level,and directly centered in front of you. It shouldbe about an arms length in front of you. 2. Your desk surface should be at roughly belly button level. When your arms are placed on the desk, your elbows should be at a ~90 degree angle, just below the desk surface. The armrests of your chair should be at nearly the same level as the desk surface to support your elbows.
3. Your feet should be flat on the floor with yourknees at a ~90 degree angle. Your seat should notbe pressing into the back of your knees; ifnecessary, tilt it slightly forward to alleviate anyknee pressure. Sit fully back in your chair, withyour back and shoulders straight and supportedby the back of the chair. 4. When typing, your wrists should be in line with your forearms and not bent up, down, or to the side. Your keyboard should be directly centered in front of you. Other frequently used items should be nearby, within arms reach.
RSIMay be worse than you think PreventIt before it causes permanent DAMAGE