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Fundamentals of RT
Fundamentals of RT - Units 4-5 SPC
| Question | Answer |
|---|---|
| Boiling point of Oxygen? | -183C or -297F @ 1ATM |
| 1 cubic foot of liquid O2 = ? | 860 cubic feet of gaseous O2 |
| 1 cubic foot of gaseous O2 = ? | 28.3L of gas |
| What is the cylinder volume ofE?G?H?K? | E = 22 CU. FT.G = 187 CU. FT.H = 244 CU. FT.K = 275 CU. FT. |
| What are the colors and uses of medical gases?O2?CO2?He?N2?N2O?He/O2? | O2 = Green - TherapyCO2 = Gray - LabHe = Brown - LabN2 = Black - LabN2O = Blue - AnesthesiaHe/O2 = Brown/Green - Therapy |
| Organizations NFPA? | Regulates storage and handling as well as central supply gas and piping systems |
| Organizations DOT? | Regulates cylinder construction, testing and transport |
| Organizations CGA? | Sets all saftely standards ASSS, PISS, DISS |
| Organizations FDA? | Set medical gas purity standards |
| PISS (Pin Index Safety System) | Yoke regulators of smaller cylinders E-AA |
| DISS (Diameter Index Safety System) | Threaded male body to female inlet port, used in central piping and flowmeter outlets |
| ASSS (American Standard Safety System) | Threaded outlet from the stem of large cylinders G,H,K to hex nut of regulator |
| Thorpe Tubes | COMPENSATED, needle distal to float, float will jump upon insertion, read accurately with back pressure |
| Duraton of Flow Calculation | PSIG times the Factor all divided by Flow |
| Cylinder Factor of E? G? H? | E = .28, G = 2.41. H = 3.14 |
| 1 LB of liquid O2 converts to how many L gaseous O2? | 344L |
| What are Oxygen concentrators? | Electrically powered units that use mloecular sieves containing Zeolite to absorb N2, H2O, and CO2 from air. At ,6L/M, 92-97% delivered |
| Alveolar Equation | PAO2 = FIO2(PB-H2O) - PaCO2/.8If FIO2>.60 eliminate /.8Quick and dirty - 7 x FIO2 - CO2 |
| O2 - Hypoventilation | Noted in COPD w/elevated PaCO2 and HCO3, develop hypoxic drive via peripheral chemoreceptors, as PaO2 above 60 mmHg, dive is diminished leading to hypoventilation |
| Absorption Atelectasis | High FIO2> . 50 = Nitrogen washout of alveolar gas. With bronchial obstruction alveolar collapse(atelectasis) may occur as O2 is absorbed in the blood |
| Oxygen Toxicity | Caused by elevated PIO2 = damage to lung tissue, increased free radical, edema and fibrosis |
| ROP - Retinoparthy of Prematurity | Noted in babies, High PaO2> 80mmHg (American Academy of Pediatrics), leads to scarring and blindness |
| Goals of O2 Therapy | 1. Treat Hypoxemia 2. Reduce WOB 3. Reduce myocardial workload as PVR is decreased |
| Indications for O2 Therapy | 1. Documented Hypoxemia = PaO2 < 60mmHg and SaO2 < 90% 2. Suspected Hypoxemia from acute M/I and severe trauma |
| Clinical Manifestations of Hypoxemia | Tachycardia, tachypnea, cyanosis, restlessness, confusion, pulmonary hypertention |
| Responsive Hypoxia | Increase in PaO2 with FIO2 due to V/Q mismatch, use low or high flow O2 device |
| Refractory Hypoxemia | PaO2 demonstrates minimum response with increase FIO2 due to shunting, use PEEP or CPAP to maintain constant airway pressure |
| Low Flow Systems - Under 15L/M | Will not meet pt peak inspitory needs, nasal cannualas - 2-4L, transtracheal O2 cateter, Simple mask - 6-10L, Partial and Non-rebreather masks 12-15L |
| Air/O2 ratio | 100-%(L air)/%-20*, *use 21 if FIO2< .40 |
| Calculate Total Flow | Flow x AIR/O2 = total flow |
| What is Reservoir Tubing used for? | Maintain FIO2, and increase L flow by adding tubing |
Created by:
mac6672
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