Body Box

Front 1

Define:FRC

Back 1

FRC is a volume of air within the lungs at the end of passive expiration.

Elastic force of lungs and chest walls are equal

Front 2

Body Box can measure what volumes?

Back 2

FRC

TGV

Airway resistance

Front 3

Define:TGV

Back 3

Thoracic Gas volume

Gas trapped in the thorax. Eve behind the non communicating bullae.

Measured at end at end expiration (beginning of FRC) so TGV should be equal to measured FRC (200 cc wnl)

Front 4

Define restriction by Body box

Back 4

TLC < 80%

[Reduced RV can suggest restriction but not diagnosis restriction]

Front 5

What two etiologies of lung restrictive are there?

Back 5

Intrinsic lung diseases

and

Extrinsic Disorders

Front 6

What are intrinsic lung diseases? ( By body box measurements )

Name examples

Back 6

Theses diseases affect the parenchyma of the lung and are caused by inflammation or scarring or result in alveolar space filled with exudate. Exposure to dust, inhaled metal particles, solvents, and arming chemicals increase risk.

THIS IS RESTRICTIVE

E.G: Acute alveolar disorders, IPF, Sarcoidosis, pneumonia, atelectasis, edema

Front 7

What are extrinsic lung disease? ( By body box measurements )

Name examples

Back 7

Disorders that include factors that contribute to the mechanics of ventilation:

THIS IS RESTRICTIVE

E.G: Neuromuscular weakness, chest wall abnormalities, pleura dz.

Front 8

What do theses values tell us for body box:

FRC > 120%

RV > 120%

Back 8

FRC > 120% for body box = hyperinflation resulting in muscular and mechanical problems and manifest as SOB

RV > 120% is air trapping possibly found in asthmatics and may be reversible

Front 9

What two values do body box show for hyperinflation and airtrapping?

Back 9

FRC > 120% = hyperinflation

RV > 120% = airtrapping

Front 10

What ares pros and cons about plethysmography?

[Pleh - this - mo- graphy]

Back 10

Pros:

accurate

captures non communicating airways

values obtained much quick than He dilution and N washout

Cons:

Most expensive

Requires more cooperation

Can Overestimate FRC

Front 11

Body box laws:

Back 11

1.) Boyle's Law: Volume inversely to pressure

Temperature held constant

2.) Enclosed tubular system that is connected are equal. Pressure changes at the mouth = to alveolar.

Panting is kept within 1 HZ or 60 breath per min

Front 12

Repeatability for body box?

Back 12

3 acceptable test at 95% for FVC max

Front 13

Body Box is diagnosis for ______

FVL is used to diagnosis ______

Back 13

Body Box = Restrictive patients

FVL = Obstructive Patients

Front 14

TLC < 80%

Back 14

Restricted

Front 15

RV > 120%

Back 15

Air Trapping

Asthma

Front 16

FRC > 120%

Back 16

Hyperinflation

Mechanical and muscular problems