ahmad24
عدد المساهمات : 95
تاريخ التسجيل : 16/01/2010
العمر : 38
 |  موضوع: Anaesthesia machine  الجمعة فبراير 05, 2010 12:48 am | |
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Anaesthesia
What does"Anaesthesia" mean
an = without
aesthesia = sensation
What does it do
The anaesthesia machine mixes the correct concentrations of gas and drugs to be inhaled and exhaled by the patient so they lose consciousness. They are held unconscious and have no sensation while being operated on, then regain consciousness after the operation
Physiology
Anaesthetic gas affects the nervous system, resulting in a numbing of the nerve pathways. The patient becomes unconscious, unaware of what is happening, has no pain, is immobile (may need breathing support) and free from memory while under the influence of the anaesthetic agent
How it works
Air, Oxygen, and Nitrous Oxide are supplied from wall outlets or cylinders. The pressures are reduced by pressure regulators then pass through an O2 failure alarm. The flow of gas is controlled by flowmeters. The gas is mixed and passed over a vaporiser containing the anaesthetic agent. An Anti-hypoxic device ensures that the flowmeters deliver a minimum of 25% O2 to the agent vaporiser. The gas then goes through an over pressure relief valve and back flow valve, then to the common gas outlet (CGO), ready to be given to the patient.
There is an emergency O2 flush valve connected to give 100% O2 if required. The gas then enters a patient circuit and ventilator. Expired gas can be stripped of CO2 in a soda-lime filter and recirculated, or scavenged out of the room
Units of measurement
Flow: L/min, Pressure: kPa and cmH2O
Typical values
Dependant on patient size, rate and strength of breathing, circulation and solubility of the anaesthetic
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هيبة ملك
عدد المساهمات : 17
تاريخ التسجيل : 15/02/2010
العمر : 35
| | موضوع: رد: Anaesthesia machine الأحد فبراير 28, 2010 5:48 am | |
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يعطيكـ 1000 عافيه الموضوع جداً شيق .. تقبل مروري ..  .. هيبة ملك | |
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