Biomed Safety safe disposal proper handling

biomedical

1. BME 700
Biomedical Lab Safety

2. Section I: Know your surroundings
Make sure you know where the nearest Power
Cut Off Button, Emergency Pull Station, Phone,
Fire Extinguisher and Fire Alarm Pull is located.
Misuse of any of the above is covered by the
student code of conduct.
Know and plan your escape routes in case of
fire or emergency.
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3. Red Power Cut Off Button
Use in the case of
electrocution, major
equipment malfunction,
fire.
Once pushed, power is
removed from all lab
stations.
The system must be
reset by Jim Koch.
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4. Blue Emergency Pull Station
Use in the case of any
emergency, medical,
accident, electrocution or
intruder.
Also call Security, 416-979-
5040, let them know the
situation.
Call 911.
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5. Video Surveillance
24/7 Video recording.
Security only records it
does not watch.
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6. Emergency Procedures
Review Poster on Lab Door
Armed Robbery/Armed Threats/Hostage Takings/Incidents Involving
Weapons
Bomb Threats
Critical Injury
Fires/Explosions
Threatening or Disturbing Behaviour
Spills and Leaks -- Radiation, Biohazardous or Chemical Agent
For detailed info see:
http://www.ryerson.ca/irm/emergencies/
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7. Section II: Lab Rules

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•Do not work alone.
- Especially when working with live circuits.
•No food or drink in the lab, drink includes bottled
water.
•Do not leave powered circuits unattended in the
lab.
•Use appropriate personal safety equipment for
work you are performing.

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•If the Fire Alarm sounds.
- The lab must be evacuated, and all persons
must leave the building by the safest route
possible.
- Give aid to any persons requiring help
evacuating the building.
Don't remove cables from the back of PC's or
test equipment.
Only 4
th
year students are allowed in the EDP
labs without supervision, keep the door closed
and don't let lower year students in the lab.

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•Electrocution/Shock from INSTALLED
equipment.
•Electrocution/Shock from TEMPORARY
wiring.
•Electrocution/Shock from APPARATUS or
POWER SUPPLIES.
Section III: Electrical hazards

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Electrocution/Shock from INSTALLED
equipment:
•Test equipment in the lab should bear the CSA
or equivalent markings.
•It is possible for a defective piece of equipment
to become lethal, should the hot wire touch an
ungrounded case.
•An accidental spill of liquid into or around
equipment can also be lethal.
•Damaged, modified line cords. Always check
apparatus line cords for damage.

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Electrocution/Shock from TEMPORARY
wiring
•Experimental apparatus wiring. Always make
sure power is turned off when making changes to
the wiring.
•Damaged test and interconnection leads. Always
check leads before use.

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Electrocution/Shock from POWER SUPPLIES or
APPARATUS
• DC power supplies.
Outputs are isolated from ground by means of a step
down transformer. Connecting any of the outputs to the
terminal marked ground (Green) will connect the circuit
and power supply to the earth ground through the line
cord.
ENG 306/307 supplies, low output voltage could shock
or prove fatal if conditions are right.

ENG 308 supplies, 60V at 6 Amps and 120V at 3 Amps.
The high voltage potential of these supplies create a
shock, electrocution hazard.
Never make wiring changes with power on.

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Electrical Shock

Electric shock occurs when the body becomes part of
an electrical circuit. Shocks can happen in three
ways.
• A person may come in contact with both conductors
in a circuit.
• A person may provide a path between an
ungrounded conductor and the ground.
• A person may provide a path between the ground
and a conducting material that is in contact with an
ungrounded conductor.

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Injury and Death
The extent of injury accompanying electric shock
depends on three factors.
• The amount of current conducted through the body.
• The path of the current through the body.
• The length of time a person is subjected to the
current.
In addition, you may strike something, or have
some other accident as a result of your response to
the shock.

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Injury < 10ma Death >10ma

16. Connecting to the Human/Animal subject
Do not use the lab power supplies.
ONLY 9V BATTERIES ARE TO BE USED IN THE
INPUT SIDE THAT IS CONNECTED TO THE
HUMAN/ANIMAL SUBJECT VIA ELECTRODES .
ISOLATION CIRCUITS AND CLAMPING DIODES ARE
MANDATORY.

17. Electrical Isolation and Clamping Circuits
Isolation Amplifiers, a non ohmic connection exists
between input and output.
3 common types, transformer, optical and
capacitive.
Use when connecting to lap top, PC, any line
powered device.
Clamping circuits provide protection from high
voltage transients.

18. Transformer Isolation
Optical IsolationCapacitive Isolation

19. Clamping Circuit

20. Section IV: Lab Equipment
• Scope
• Multimeter
• Function Generator
•Computer
•Soldering Iron

21. Scopes
Precautions
• The scope's ground inputs are grounded to earth
ground through the line cord.
• Extreme care must be taken when placing the scope
ground on the circuit under test in order to avoid a short
circuit.
• Use a Differential probe to avoid grounding problems.

22. Multimeter
Precautions
• Remove meter from circuit before changing ranges.
• Never measure a live circuit using Ohms/Diode range.
• The meter looks like a dead short when on the current
range, extreme caution must be used, never try to
measure voltage when on the current range.
• Do not make measurements that may exceed the
meters ratings.
• Protect yourself with a set of fused leads.

23. Function Generator
Precautions
• Do not connect output directly to a voltage source.
• The output ground is connected to earth ground
through the line cord, use caution when placing ground.

24. Computers
Bench top and some lap tops.
Precautions
• The PC is grounded to earth ground through the
mains plug. This means that the Serial, Video, USB,
and Parallel printer port are all at earth ground potential.
Caution must be used when interfacing circuits to the
PC.

25. Solder Irons – Fume Extractors
Precautions
• Tip is very hot, will burn flesh instantly.
• Wear safety glasses and limit exposed skin.
• Make sure fume extractor is on.
• Use only lead free solder.

• Do not use plumbers soldering paste it will eat your board.
•Make sure you hold the leads when trimming so they don't fly
into someones eye or equipment.

26. Section V: Accident Response
• Minor cuts and scrapes: Use the first aid kit in the lab. Or see our First Aider
in ENG439.
• Non Electrical serious and life threatening injuries: Pull the Blue emergency
pull station. Call security. Go to ENG439 to get the designated First Aider.
Use the first aid kit in the lab.
Electrocution, Burn, Shock: Push the Red power shutoff button in the lab,
Pull the
Blue emergency pull station. Send a student to ENG439 to get the
designated First Aider. Call security.
• If the First Aider can't be found try any of the engineering support staff, they
all have had first aid training.
•Call security if you can't handle the situation or can't find the First Aider.

27. What to do in case of Electrocution, shock:
• Push Red Button to shut off power. Pull the Blue Emergency
Pull.

• Call Security and send someone for the First Aider in ENG439.
• Look before you touch. The person may still be connected to
the current. Touching them can pass the current through your
body.
If the person is still connected to the electrical source remove
them from the current using a piece of nonconducting material
such as wood, cardboard or plastic. Or if it is safe to do so
unplug or shut off the source.
• DO NOT touch the person with your bare hands if they are still
connected to the current.

28. What to do in case of Electrocution, shock:
•Check vital signs. Look for signs of breathing and a pulse.
If the person is not breathing qualified persons should begin
CPR.
•After a shock or burn to prevent shock. Have the person lie
down on their side and elevate their legs higher than their
head.
• DO NOT move the injured person unless absolutely
necessary
• In cases of burns and shock, send the person to the hospital.
• Inform management of the accident.

29. Accident Reporting
Report the Accident/Incident/Exposure to:
• Person in charge of Lab
Your professor
The Chair / Academic Director
Environmental Health and Safety (EHS)
416-979-5000 x 553770

30. Electrical Safety Authority
The Electrical Safety Authority's (ESA) mission is to improve
electrical safety for the well-being of the people of Ontario. ESA
is responsible for administering specific regulations related to
the Ontario Electrical Safety Code, licensing of Electrical
Contractors and Master Electricians, electricity distribution
system safety, and electrical product safety.

The Ontario Electrical Safety Code (OESC) and Ontario
Regulation 438/07 require that all electrical products and
devices (including equipment) be approved.
Always make sure the product or device you are using has a
recognized mark or label and is deemed to be approved. A list
of recognized marks and labels is available on the ESA's
website.

31. Electrical Safety Authority

32. Workplace Hazardous Materials
Information System
The Workplace Hazardous Materials Information System
(WHMIS) is Canada's national hazard communication
standard. The key elements of the system are
cautionary labeling of containers of WHMIS "controlled
products", the provision of material safety data sheets
(MSDSs) and worker education and training programs.
Before you start work with any product check it's MSDS
sheet for proper use.

33. Biomedical Safety Hospital Equipment
Source: LSUHSC-Monroe E. A. Conway Medical Center Library
Be kind to the equipment.
 Remove plugs from the wall sockets by grasping
the body of the plug not by pulling on the line cord.
• Avoid routing powering cords and patient cables in
areas of heavy foot traffic or cart traffic. If possible,
do not roll carts over power cords or patient cables.
• Do not drape power cords or patient cables across
sinks, or any other metal or wet surface.
• Do not use multiple outlet adapters or extension
cords.

34. •Do not put vessels containing liquids that could be spilled on
the top of equipment.
•If you receive an electric shock, even a minor one ("tingling"
sensation) when you touch a piece of equipment, report it
immediately. Failure to do this could cost a life.
• If possible, avoid touching electrical equipment (even the
controls of monitors) with one hand and another metal surface
with the other hand particularly if you suspect an electrical
problem. Do not touch equipment with wet hands.
•If a patient is connected to the equipment (such as an ECG
monitor or recorder) remove the connections before switching
the power "on" or “off”.
•Do not use damaged or worn wall outlets.

35. Thank You