Podcast
Questions and Answers
A positive pressure leak could be caused by a leakage in, or, at ______ components.
A positive pressure leak could be caused by a leakage in, or, at ______ components.
device
Dow Corning ______ is to be used to lubricate O-rings.
Dow Corning ______ is to be used to lubricate O-rings.
111
The pressure relief valve is designed to open when the pressure within the breathing circuit is between +20 and +50 ______ of pressure measured on the water gage.
The pressure relief valve is designed to open when the pressure within the breathing circuit is between +20 and +50 ______ of pressure measured on the water gage.
millimeters
The EPDM breathing hoses use ______ Rings.
The EPDM breathing hoses use ______ Rings.
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Only ______ 400 is to be used to fill the refillable cartridge.
Only ______ 400 is to be used to fill the refillable cartridge.
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The BG-4 constant dosage must be 1.5 to 1.9 ______ per min.
The BG-4 constant dosage must be 1.5 to 1.9 ______ per min.
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The drain valve should not open at less than ______ embar.
The drain valve should not open at less than ______ embar.
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A fully filled steel oxygen cylinder holds ______ liters of medical oxygen.
A fully filled steel oxygen cylinder holds ______ liters of medical oxygen.
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The minimum valve provides greater than ______ L/min flow.
The minimum valve provides greater than ______ L/min flow.
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The breathing bag has a ______ liter volume.
The breathing bag has a ______ liter volume.
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The first low pressure warning occurs when the pressure drops to approximately ______ psi.
The first low pressure warning occurs when the pressure drops to approximately ______ psi.
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Medium pressure in the BG-4 is between ______ psi and 64 psi.
Medium pressure in the BG-4 is between ______ psi and 64 psi.
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Study Notes
Oxygen Cylinder and Equipment Specifications
- A fully filled steel oxygen cylinder contains 440 liters of medical oxygen.
- It is critical to ensure the drain valve does not open at pressures below 10 embar.
- The BG-4 breathing apparatus weighs 15 kg (33 lbs) when fully charged.
- The maintenance of the BG-4's battery is crucial; it should be replaced every 6 months.
- Avoid replacing batteries in potentially explosive environments.
Pressure Measurement and Flow Rates
- Sentinel pressure measurement accuracy is ±2% of the final value.
- The first low pressure warning triggers at approximately 700 psi, indicating about 75% oxygen used.
- The last low pressure warning occurs at approximately 145 psi, with roughly 95% oxygen depleted.
- Medium pressure in the BG-4 ranges between 58 psi and 64 psi.
- The minimum valve provides flow rates greater than 80 L/min.
Testing Procedures and Guidelines
- Conduct supply checks on the Sentinel every 15 minutes.
- During the constant dosage test, the RZ-25 tester should indicate a flow of 1.5 to 1.9 LPM.
- The breathing bag has a volume of 5.5 liters.
- Proper testing involves adjusting the zero point on the RZ-25 tester before conducting tests.
- Use a test adapter to connect the BG-4 apparatus to the RZ-25 tester.
Maintenance and Safety
- Rubber components must be shielded from radiation and avoid exposure to solvents like acetone and alcohol.
- Ensure belt and harness are dry before storage to prevent mold and fungus growth.
- A failed self-check on the device is indicated by symbol X with an error code.
Alarm and Warning Systems
- The yellow panic button initiates the main alarm on the Sentinel.
- First low pressure alarm emits intermittent sounds for about 30 seconds with a flashing red LED.
- The pressure relief valve operates between +20 and +50 millimeters (+2 embar to +5 embar) on the water gauge.
Component Care and Troubleshooting
- Use Dow Corning 111 to lubricate O-rings.
- To prevent leaks, check the inhalation and exhalation valves for defects.
- The proper functioning of the exhalation valve should show -10 embar and +10 embar for inhalation cycles on the pressure gauge.
- During a positive pressure leak test, ensure pressure drop is less than 1 embar within one minute.
Cartridge and Chemical Usage
- Only DRAGERSORB 400 should fill the refillable cartridge, which remains good for 4 years from the manufacture date.
- Factory-packed cartridges are also viable for the full four years.
- A positive pressure within the breathing circuit is essential to stop ambient air infiltration.
Regulatory Compliance
- The BG-4 system is approved for use with both factory and refillable cartridges.
- Steel cylinders are considered full at 3135 psi when a + sign is marked post hydro test.
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Description
This quiz covers the maintenance and testing of anesthesia equipment, including procedures for replacing batteries, lubricating O-rings, and adjusting pressure relief valves. It also reviews the use of specific devices and tools, such as the RZ-25 tester and BG-4 apparatus. Test your knowledge of anesthesia equipment maintenance and troubleshooting.
