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Test

Airway Mechanics

Usuario eliminado 10 preguntas Actualizado el 11 ene 2017

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Preguntas del test (10)

  1. 1Formula for Raw
    ([blank_start]Mouth[blank_end] Pressure - [blank_start]Alveolar[blank_end] Pressure) / [blank_start]Flow[blank_end]
    1. AMouth
    2. BAlveolar
    3. CFlow
  2. 2Airway resistance:
    Difference in pressure between the [blank_start]mouth[blank_end] and the [blank_start]alveoli[blank_end], related to gas [blank_start]flow[blank_end] at the mouth.
    Typical value [blank_start].6[blank_end] - [blank_start]2.4[blank_end] cmH2O / L/sec
    Measured by body pleth: Pt pants gently with open shutter at a rate of [blank_start]1.5[blank_end] - [blank_start]2.5[blank_end] breaths per second. This creates an 2 shaped curve on screen that plots flow against box pressure. Shutter closes and second curve is produced that plots mouth pressure against box pressure. Raw is calculated from these 2 graphs.
    1. Amouth
    2. Balveoli
    3. Cflow
    4. D.6
    5. E2.4
    6. F1.5
    7. G2.5
  3. 3Normal Raw Values
    Nose, mouth, upper airway: [blank_start]50[blank_end]%
    Trachea, Bronchi: [blank_start]30[blank_end]%
    Small Airways: [blank_start]20[blank_end]%
    1. A50
    2. B30
    3. C20
  4. 4Airway Conductance ([blank_start]Gaw[blank_end])
    Flow per unit of [blank_start]pressure[blank_end] change in L/sec/cmH2O
    Reciprical of Raw: 1/[blank_start]Raw[blank_end]
    [blank_start]Specific[blank_end] conductance is the same but is measured by liter of [blank_start]lung[blank_end] volume: (1/Raw)/[blank_start]TLC[blank_end] or [blank_start]FRC[blank_end]
    Normal Value: .[blank_start]42[blank_end] - [blank_start]1.67[blank_end] L/sec/cmH20
    More appropriate than Raw for small airway disease
    1. AGaw
    2. Bpressure
    3. CRaw
    4. DSpecific
    5. Elung
    6. FTLC
    7. GFRC
    8. H42
    9. I1.67
  5. 5Compliance
    Volume Change per unit of Pressure change
    CLT = Lungs and [blank_start]Thorax[blank_end] = [blank_start].2[blank_end] L/cmH2O
    CL = [blank_start]Lungs[blank_end] Only = [blank_start].2[blank_end] L/cmH2O
    CT = [blank_start]Thorax[blank_end] only = [blank_start].1[blank_end] L/cmH2O

    In vented patients record plateau pressure at different lung volumes.
    1. A.2
    2. B.2
    3. CThorax
    4. DLungs
    5. E.1
    6. FThorax
  6. 6Compliance:
    [blank_start]Esophogeal[blank_end] Balloon Technique
    Catheter with inflatable [blank_start]balloon[blank_end] is marked [blank_start]50[blank_end] cm from the tip.
    Balloon is inserted through the nose and swallowed into [blank_start]stomach[blank_end].
    In the stomach pressure swings [blank_start]positive[blank_end] on inspiration and [blank_start]negative[blank_end] on expiration after 1 ml of air is injected.
    Balloon is retracted into [blank_start]esophagus[blank_end] and the pressure swings [blank_start]reverse[blank_end].
    Catheter is [blank_start]35[blank_end] - [blank_start]45[blank_end] cm from the nose.
    Air is evacuated from the balloon, then [blank_start].5[blank_end] ml is injected.
    Pt inspires to [blank_start]TLC[blank_end] before taking any measurements to standardize.
    Have pt inspire again - pressure and volume measurements are taking at zero flow.
    Lung compliance is taken from slope of P-V [blank_start]curve[blank_end] over segment from FRC to [blank_start]FRC[blank_end] +.5L
    At FRC balloon pressure should equal [blank_start]-5[blank_end] cmhO
    Max elastic [blank_start]recoil[blank_end] pressure is the most [blank_start]negative[blank_end] pressure at TLC
    Static lung compliance is the difference of [blank_start]esophageal[blank_end] pressure and mouth [blank_start]pressure[blank_end].
    1. AEsophogeal
    2. Bballoon
    3. C50
    4. Dstomach
    5. Epositive
    6. Fnegative
    7. Gesophagus
    8. Hreverse
    9. I35
    10. J45
    11. K.5
    12. LTLC
    13. MFRC
    14. Ncurve
    15. O-5
    16. Precoil
    17. Qnegative
    18. Rpressure
    19. Sesophageal
  7. 7Static Lung Compliance
    Change in lung [blank_start]volume[blank_end] per unit change in transpulmonary [blank_start]pressure[blank_end] measured over the straight portion of P-V curve between FRC and FRC + [blank_start].5L[blank_end]
    Δ[blank_start]V[blank_end] / Δ[blank_start]Pst[blank_end]

    Normal Value = [blank_start].2[blank_end] L/cmH2O
    1. Avolume
    2. Bpressure
    3. C.5L
    4. DPst
    5. EV
    6. F.2
  8. 8Abnormal Compliance
    CL is [blank_start]decreased[blank_end] in [blank_start]restrictive[blank_end] disease like pneumonia, atelectasis, pulm fibrosis
    CL is [blank_start]increased[blank_end] in emphysema because of loss of [blank_start]elasticity[blank_end]
    CT is [blank_start]decreased[blank_end] with chest wall deformities and obesity.
    1. Arestrictive
    2. Belasticity
    3. Cdecreased
    4. Dincreased
    5. Edecreased
  9. 9Maximum Static Recoil Pressure
    Most [blank_start]negative[blank_end] pressure obtained at TLC
    Normal value is [blank_start]24.4[blank_end] - [blank_start]34.5[blank_end] cmH2O
    1. Anegative
    2. B24.4
    3. C34.5
  10. 10CoEffecient of Retraction
    COR is used to express the maximal static recoil [blank_start]pressure[blank_end] of the lung relative to the lung [blank_start]volume[blank_end] (TLC)
    COR = (Pst at [blank_start]TLC[blank_end]) / [blank_start]TLC[blank_end]
    Normal Value = [blank_start]4[blank_end]-[blank_start]8[blank_end] cmH2O/L
    1. Apressure
    2. Bvolume
    3. CTLC
    4. DTLC
    5. E4
    6. F8

Información

Descripción
El usuario ha eliminado su información de asignaturas Test sobre Airway Mechanics, creado por Usuario eliminado el 19/08/2016.
Autor
Usuario eliminado
Idioma
English
Visitas
46
Historial
Creado el 19 ago 2016 · actualizado el 11 ene 2017

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