Term
| Factors influencing compliance |
|
Definition
tissue structure and composition
vascular distention
surface tension |
|
|
Term
| surface tension (LaPlace's Law) |
|
Definition
directly proportional to tension
inversely proportional to radius
(The recoil pressure of a bubble is inveresly related to the radius of the bubble.) |
|
|
Term
| the point of the surface tension / recoil pressure shit is... |
|
Definition
| as the radius of a balloon goes down, the tendency for it to collapse (pressure goes up) goes up. |
|
|
Term
| inflating a lung with fluid makes it _____ compliant. |
|
Definition
|
|
Term
| surfactant production beings at |
|
Definition
24-26 weeks gestation
(sphingomyelin ration of 2:1 is good indication of fetus lung development) |
|
|
Term
active breathing is _____
passive breathing is _____ |
|
Definition
active -> patient
passive -> machine |
|
|
Term
| chest wall distensibility/pressures can only be measured when |
|
Definition
| it's passively inflated using a machine |
|
|
Term
|
Definition
| there is an uncoupling of the lung and chest wall |
|
|
Term
|
Definition
breathing in adds pressure but it can't be released
so you either die or stick it with a needle and equilibrate |
|
|
Term
| inspiratory capacity is limited by |
|
Definition
|
|
Term
| residual volume is limited by |
|
Definition
| how much chest can constrict |
|
|
Term
|
Definition
| to achieve a particular volume, more pressure must be applied on the inlfaction limb of the P-V curve than on deflation |
|
|
Term
Elasticity of the lung and chest wall are additive.
Equation and normal values are? |
|
Definition
1/CRS = 1/CL + 1/CCW
CL = 200, CCW = 200, CRS = 100 |
|
|
Term
|
Definition
needed to get breath in
dynamic |
|
|
Term
|
Definition
needed to keep breath in
static |
|
|
Term
| dynamic compliance is lower than static compliance because |
|
Definition
| when air is rushing in, the movement adds airway resistance, making compliance lower |
|
|
Term
dynamic/static compliance =
|
|
Definition
| TV / peak/plat pressure - PEEP |
|
|
Term
Resistance =
ResistanceAW = |
|
Definition
ΔPressure / flow
(Peak - Plat) / flow |
|
|
Term
| 4 things cause peak pressure to increase |
|
Definition
decrease compliance
increase RAW
increase TV
Increase flow
(TV and flow are fixed on respirator) |
|
|
Term
| 2 things will cause increase in plateau pressure |
|
Definition
decrease compliance
increase TV |
|
|
Term
Disease state:
peak pressure decreased |
|
Definition
air leak
hyperventilation |
|
|
Term
Disease state:
peak pressure unchanged |
|
Definition
pulmonary embolus
extrathoracic process |
|
|
Term
Disease state with peak pressure increase:
plateau pressure unchanged |
|
Definition
Airway Obstruction
Aspiration
Bronchospasm
Secretions
Tracheal Tube
Obstruction
|
|
|
Term
Disease state with peak pressure increase:
Plateau pressure increased |
|
Definition
Decreased Compliance
Abdominal Distention
Asynchronous Breathing
Atelectasis
Auto-PEEP
Pneumonia
Pneumothorax
Pulmonary Edema
|
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|
