Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
39 Cards in this Set
- Front
- Back
what does the DISS stand for and what does it do?
|
Diameter index safety system. they are non interchangeable connections that are gas specific so that the gas is connected to the right pipeline inlet.
|
|
What if you lose oxygen pipeline pressure?
|
Open the emergency oxygen cylinder fully, disconnect the pipeline connection at the wall; trouble shoot why somtehing is wrong
|
|
What does PISS stand for and what does it do?
|
Pin index safety system: prevents the misconnection of a cylinder to the wrong yoke, keeps cylinders closed, it has a unique arrangement of pins for each gas, pin holes match the yoke
|
|
What is the PISS for nitrous?
|
3,5
|
|
What is the PISS for O2?
|
2,5
|
|
What is the PISS for Air?
|
5,1
|
|
Behind the machines check the...
|
Hanger yoke and the check valve
|
|
What are the 3 functions for the hanger yoke?
|
Orients cylinders, provides a gas-tight seal, ensures unidirectional flow
|
|
What doe s the check valve (located w/in hanger yoke) do?
|
reduces the chance of transfilling or leakage (if yoke is empty) or allows change of cylinders during a case
|
|
What are the 3 types of pressure relief valves
|
1. fusible plug: thermally operated, when pressure increases from high temp, the fusible material turns soft& extrudes for the holder, allowing the gas to escape
2, frangible disc: a metal disc designed to burst when a certain pressure is exceeded 3. safety relief valve: a valve that opens under extreme pressure |
|
Classifications of semiclosed circle system
|
1. Has gas reservior bag
2. partial rebreathing 3. chemical neutralizations of CO2 4. 2 unidirectional valves 5. has APL valve 6. Fresh gas flow less than min ventilation |
|
What r the 7 components of the semi-closed circle system
|
1. Fresh gas flow source
2. Inspiratory and expiratory unidirectional valves 3. Inspiratory and expiratory corrugated tubes 4. Y piece connector 5. APL valve 6. reservoir bag 7. Carbon dioxide absorbent |
|
What advantages of semi-closed circle system
|
-constancy of inspired concentration
-conserves resp moisture and heat -minimal OR pollution |
|
What are the disadvantages ofsemi-closed circle system
|
-complex design
-mulitple connection which can disconnect or leak --rebreathing CO2 if stuck open -total occlusion of circuit if stuck closed |
|
other names for unidirectional valves
|
-flutter valves
-one way valves -check valves -directional valves -dome valves |
|
what do the APL valve do
|
limits the amount of pressure build up that can occur during manual ventilation
|
|
what are the end products of CO2 neutralization?
|
heat
water carbonate |
|
Soda Lime produces____ when CO2 is neutralized?
|
4% NAOH
1%KOH 14-19% water CAOH 100% contains silica for hardening |
|
Barium Lime produces____ when CO2 is neutralized?
|
20% barium
80% CAOH |
|
Soda Lime granules are ___
|
4 to 8 mesh with irregular surface in the combination of small and large granuels
|
|
What is the maximum volume of CO2 that can be absorbed is?
|
26 L of CO2 per 100 gm of granules
|
|
Desiccated CO2 absorbents and Sevo produce
|
Compound A
|
|
desiccated CO2 absorbents and Desflurance produce
|
carbon monoxide
|
|
What is a power source ventilator?
|
a vent that runs off of compressed gas and electricity except piston vents
|
|
What is a drive mechanism ventilator?
|
double circuit (pneumatic force compresses a bellow which empties its content to the patient) pneumatically driven
-Ohmeda= driving gas is 100% oxygen -Drager= driving gas is a venturi mix of oxygen and room air |
|
Where is the most common place to disconnect with vents?
|
Y piece by ETT
|
|
What is CMV?
|
volume control mode: the volume is kept the same and is delivered at a constant flow & rate; volume adjusted for ETCO2
|
|
What is PVC?
|
pressure control mode: controls inspiratory pressure, results is increased tidal volume at a lower PIP, useful in laparoscopic surgery and obesity
|
|
What is SIMV?
|
synchronized intermittent mandatory ventilation, useful during emergence from anesthesia
|
|
National institute for occupational safety/health (NIOSH) defined safe levels of N2O to be ... and Halogenated agents to be...
|
N2O= less than 25 ppm
halogenated agents= less than 2 ppm and .5 ppm if N2O is used |
|
Explain that scavenager interface for Ohmeda machines
|
-its a closed interface
-communicates to atm only thru valves -used active system must have pos and neg pressure relief valves -5 L bag is attached and mounted at the bottom |
|
Explain that scavenager interface for Drager machines
|
-open interface
-no valves; open to at; neg and pos pressure relief built in -used only with active system |
|
What does the low pressure alarm detect
|
1. disconnect (usually at inspiratory or expiatory y piece)
2. major air leaks 3. leaking tracheal cuff 4. failure of ventilator to cycle |
|
What does the high pressure alarm detect
|
1. airway obstructions (laryngospasm)
2.decreased lung compliance (bronchospasm) 3. kinked or occluded ETT 4. patient coughing against ETT 5. occlusion of expiatory limb |
|
What does the sub ambient pressure alarm detect
|
1. pt attempting to inhale against an empty reservior bag
2. blocked inspiratory limb 3. malfunctioning of an active scavenging system 4. NG tube placed in the trachea *most common |
|
What is the purpose of unidirectional valves?
|
to prevent rebreathing of CO2
|
|
What can faulty unidirectional valves cause?
|
rebreathing
|
|
DOT and TC require specific markings on cylinders what are they?
|
1. type of material tank is made of
2. service pressure in PSI 3. serial # and sumbol of purchaser, user or manufacturer 4. inital qualifying test date and retest date 5 + sign = ability to add 10% service pressure |
|
Testing cylinders include...
|
-inspected q 5 yr
-month and yr permanently on tank -external/internal visual check for corrosion or impact or distortion -leak tested by increasing their service pressure by 1.66 times -service pressure: max press to which the cylinder may be filled at 70 F |