A medical equipment that provides Cardiopulmonary bypass, (temporary mechanical circulatory support) to the stationary heart and lungs)
Heart and Lungs are made “functionless temporarily” , in order to perform surgeries
CABG
Valve repair
Aneurysm
Septal Defects
POWER GENERATION OF THERMAL POWER PLANTsathish sak
. The kinetic energy of the molecules in a solid, liquid or gas
2. The more kinetic energy, the more thermal energy the object possesses
3. Physicists also call this the internal energy of an object
mathematics application fiels of engineeringsathish sak
MATHS IS HARD
MATHS IS BORING
MATHS HAS NOTHING TO DO WITH REAL LIFE
ALL MATHEMATICIANS ARE MAD!
BUT I CAN SHOW YOU THAT MATHS IS IMPORTANT IN
CRIME DETECTION MEDICINE FINDING LANDMINES
Plastic is a material consists of wide range of synthetic or organics that can be moulded into solid object with diverse shapes.
The word PLASTIC is derived from the Greek Word “PLASTIKOS” meaning capable of being shaped or moulded.
Plastics are organic polymers of higher molecular mass.
Radio frequency identification(RFID) technology using at various application by using radio frequency ranges.
It is especially used at tollgates. For automation of gate control.
It can also used at library systems.
Green Chemistry is the utilisation of a set of principles that reduces or eliminates the use or generation of hazardous substances in the design, manufacture and application of chemical products .
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2. What is It ?
A medical equipment that provides
Cardiopulmonary bypass, (temporary
mechanical circulatory support) to the
stationary heart and lungs)
Heart and Lungs are made “functionless
temporarily” , in order to perform surgeries
CABG
Valve repair
Aneurysm
Septal Defects
3. Content…
On May 6, 1953, Dr. Gibbon
used his heart–lung machine to
successfully repair an atrial
septal defect in an 18 year-old
girl,
Marking the first successful
clinical use of a Heart–Lung
Machine
6. Principles and Necessity
Heart is Stopped
Blood diverted through
tubes and is pumped
to maintain flow
Temperature regulation of blood
and gaseous exchange is done
Blood circulated systemically
bypassing the heart
and lungs
7.
8. Parts
Five pump assemblies
Venous Cannula
Arterial Cannula - dual-stream aortic perfusion
catheter / meshed cannula
Venous Reservoir
Oxygenators
Heat Exchangers
Cardiotomy Reservoir and Field Suction
Filters and Bubble Traps
Tubing and Connectors
9. Pumps
Centrifugal pumps consist of plastic cones,
which when rotated rapidly, propel blood by
centrifugal force.
Forward blood flow, varies with the speed of
rotation and the after load of the arterial line.
Centrifugal blood pumps generate up to 900
mm Hg of forward pressure, but only 400 to 500
mm Hg of negative pressure. Hence, less
gaseous micro emboli.
Centrifugal pumps produce pulse less blood
flow
Centrifugal
Roller
11. Five pump assemblies :
A centrifugal or roller head pump
can be used in the arterial position
for extracorporeal circulation of the
blood.
Left ventricular blood return is
accomplished by roller pump,
drawing blood away from the heart.
Surgical suction created by the
roller pump removes accumulated
fluid from the general surgical field.
The cardioplegia delivery pump.
Emergency Backup of the arterial
pump in case of mechanical failure.
12. Venous Reservoirs
Reservoirs may be rigid (hard)
plastic canisters ("open" types) or
soft, collapsible plastic bags
("closed" types).
Venous bubble trap present,
Provides a convenient place to add
drugs, fluids, or blood, and adds
storage capacity for the perfusion
system.
14. Membranous Oxygenators
Imitate the natural lung by interspersing a thin
membrane of either micro porous
polypropylene or silicone rubber between the
gas and blood phases.
With micro porous membranes, plasma-filled
pores prevent gas entering blood but facilitate
transfer of both oxygen and CO2.
fibers connected to inlet and outlet manifolds
within a hard-shell jacket.
15. Bubble Oxygenators
Venous blood drains directly into a
chamber into which oxygen is
infused through a diffusion plate
(sparger).
The sparger produces thousands of
small (approximately 36 µm) oxygen
bubbles within blood.
Gas exchange occurs across a thin
film at the blood-gas interface
around each bubble
Produce more particulate and
gaseous microemboli are more
reactive to blood elements.
16. Heat Exchangers
Control body temperature by
heating or cooling blood passing
through the perfusion circuit
Temperature differences within the
body and perfusion circuit are
limited to 5°C to 10°C to prevent
bubble emboli
17. Filters and Bubble Traps
In the circuit, micro emboli are
monitored by arterial line
ultrasound or monitoring screen
filtration pressure.
Depth filters consist of porous
foam, have a large, wetted surface
and remove micro emboli by
impaction and absorption
Screen filters are usually made of
woven polyester or nylon thread.
18. Tubing
Medical grade Polyvinyl Chloride (PVC)
tubing
It is flexible, compatible with blood,
inert, nontoxic, smooth, nonwettable,
tough, transparent, resistant to kinking
and collapse,
Can be heat sterilized
19. Perfusion Monitors and
Sensors
A low-level sensor with alarms on the venous reservoir
and a bubble detector on the arterial line are desirable
safety devices.
Flow-through devices are available to continuously
measure blood gases
Temperatures of the water entering heat exchangers
20. Sterilization :
Ethylene dioxide is commonly used
4 hours of sterilization at 55°C or 18
hours at 22°C .
Disadvantages of ethylene dioxide , are
the toxicity and explosive nature
Disposable tubing ,reservoirs and
oxgenator
Steam sterilization as PVC can withstand
heat
21. Advantages
Require low volume of blood for
priming.
The association with minimal
biocompatibility problems.
A low haemolysis rate (possibly due
to the lack of blood backflow or
turbulence.
22. Disadvantages
Tubing will crack or release plastic
fragements that can become
particulate emboli.
In the event of a tube blockage,
there is a possiblity that the pump
will continue to operate and cause
the tubing to rupture.