Notes in PFTs

To Subscribe, use this Key

Status	Last Update	Fields
Published	09/08/2024	PFT Components include (3) {{c1::spirometry, DLCO, lung volumes}}
Published	09/08/2024	Indications for PFTS:  {{c1::symptoms, risk factors, exposure, screening (ie: amiodarone)}}
Published	09/08/2024	contraindications for PFTs: {{c1::High pressure (brain/eye surgery, pneumothorax, glaucoma), sick (acute respiratory distress), hemoptysis}}
Published	09/08/2024	{{c1::Spirometry}} is the best initial test for the evaluation of pulmonary function
Published	09/08/2024	procedure for a spirometry test:The patient breathes forcefully through their mouth into an external device.Four phases of inspiration and expiration …
Published	09/08/2024	{{c1::Forced Vital Capacity (FVC)}}: how much air is moving?
Published	09/08/2024	normal forced vital capacity is {{c1::≥ 80% predicted}}
Published	09/08/2024	if FVC is reduced → {{c1::RVC}}: resrictive disease which is divided into {{c2::intrinsic}} and {{c2::extrinsic}}
Published	09/08/2024	{{c2::intrinsic}} restrictive disease has to do with the lungs, for example could be due to {{c1::pulmonary fibrosis, pulmonary edema}}
Published	09/08/2024	{{c2::extrinsic}} restrictive disease does NOT have to do with the lungs, for example could be due to {{c1::scoliosis, obesity, neuromuscular disease}…
Published	09/08/2024	{{c1::Forced Expiratory Volume in 1 second (FEV₁)}}: how fast is it moving?
Published	09/08/2024	normal FEV1 is {{c1::≥ 80% predicted}}
Published	09/08/2024	a decreased FEV1 (slower speed) indicates {{c1::obstructive}} disease ({{c1::expiration}} problem)
Published	09/08/2024	examples of obstructive diseases are {{c1::COPD: chronic bronchitis, emphysema }}
Published	09/08/2024	{{c1::FEV₁ / FVC Ratio}}: the portion of FVC that is expelled in 1 second
Published	09/08/2024	a normal FEV₁ / FVC Ratio is  {{c1::≥ 70%}}
Published	09/08/2024	if FEV1/FVC ratio is ≤ 70% = {{c1::obstruction}} (a “{{c2::straw}}” problem, trouble getting air {{c2::out}})
Published	09/08/2024	d40ab00568ea45ec8c382ccf92ebb785-oa-1
Published	09/08/2024	d40ab00568ea45ec8c382ccf92ebb785-oa-2
Published	09/08/2024	The top of a flow volume loop is {{c1::expiration}} and the bottom is {{c1::inspiration }}
Published	09/08/2024	7fbadda603e14835bb6dc938fe4d5aaf-ao-1
Published	09/08/2024	7fbadda603e14835bb6dc938fe4d5aaf-ao-2
Published	09/08/2024	7fbadda603e14835bb6dc938fe4d5aaf-ao-3
Published	09/08/2024	7fbadda603e14835bb6dc938fe4d5aaf-ao-4
Published	09/08/2024	7fbadda603e14835bb6dc938fe4d5aaf-ao-5
Published	09/08/2024	7fbadda603e14835bb6dc938fe4d5aaf-ao-6
Published	09/08/2024	5f269ecd8d1f447d8034eb715ee43dea-ao-1
Published	09/08/2024	5f269ecd8d1f447d8034eb715ee43dea-ao-2
Published	09/08/2024	5f269ecd8d1f447d8034eb715ee43dea-ao-3
Published	09/08/2024	Flow Volume Loops:*{{c1::Flattening}} = narrowing in larger airways or tracheaVariable {{c4::extra}}thoracic obstruction: {{c2::inspiration}} pro…
Published	09/08/2024	e1876df5262e4d6780590284edda2b8d-oa-1
Published	09/08/2024	e1876df5262e4d6780590284edda2b8d-oa-2
Published	09/08/2024	e1876df5262e4d6780590284edda2b8d-oa-3
Published	09/08/2024	e1876df5262e4d6780590284edda2b8d-oa-4
Published	09/08/2024	e1876df5262e4d6780590284edda2b8d-oa-5
Published	09/08/2024	the methacholine challenge is indicated for patients with suspected airway {{c1::hyperresponsiveness}}.PFTs are performed before and af…
Published	09/08/2024	methacholine challenge is the Gold standard for {{c1::asthma}} diagnosis: FEV₁ decrease of ≥ 12%
Published	09/08/2024	{{c1::DLCO}}: diffusion capacity of the lungs for carbon monoxide (CO), normal = {{c2::76-140%}}
Published	09/08/2024	{{c1::DLCO}} is measuring how well  does air move from alveoli to capillaries
Published	09/08/2024	DLCO: Hb has a high affinity for CO so it is a good indicator of gas movement across the alveoliInspire full breath of measured CO (used as a pro…
Published	09/08/2024	variables assessed in DLCO:{{c1::Alveolar surface area}}: how much area is available to allow for diffusion?{{c2::Pulmonary perfusion}}: how much bloo…
Published	09/08/2024	0cfb5b97247f4cff83c54803911a07db-oa-1
Published	09/08/2024	0cfb5b97247f4cff83c54803911a07db-oa-2
Published	09/08/2024	0cfb5b97247f4cff83c54803911a07db-oa-3
Published	09/08/2024	0cfb5b97247f4cff83c54803911a07db-oa-4
Published	09/08/2024	0cfb5b97247f4cff83c54803911a07db-oa-5
Published	09/08/2024	{{c1::Tidal volume}}: the volume of air moved in and out of the lungs during normal, quiet breathing
Published	09/08/2024	{{c1::residual volume}}: the volume of air remaining in the lungs after a maximal expiration (maintains alveolar patency)
Published	09/08/2024	{{c1::Expiratory reserve volume}}: the volume of air that can be further exhaled at the end of normal expiration
Published	09/08/2024	{{c1::Inspiratory reserve volume}}: the volume of air that can be further inhaled at the end of normal inspiration
Published	09/08/2024	{{c1::Vital capacity}}: maximum amount of air that can be exhaled following maximum inspiration, all the air that can be moved (IRV + TV + ERV)
Published	09/08/2024	{{c1::Total lung capacity}}: the volume of air in the lungs at maximum inspiration (VC + RV)
Published	09/08/2024	{{c1::Functional residual capacity (FRC)}}: volume of gas in the lungs at normal tidal volume end expiration (ERV + RV)↑ FRC = {{c2::hyperinflati…
Published	09/08/2024	c73013fa541d4bc78a1030557b637c2e-oa-1
Published	09/08/2024	c73013fa541d4bc78a1030557b637c2e-oa-2
Published	09/08/2024	c73013fa541d4bc78a1030557b637c2e-oa-3
Published	09/08/2024	ad68e1b6b06d45a7bac6093116e845df-oa-1
Published	09/08/2024	2f834fbbc0b6480e86731af8b28f71f0-ao-1
Published	09/08/2024	2f834fbbc0b6480e86731af8b28f71f0-ao-2
Published	09/08/2024	2f834fbbc0b6480e86731af8b28f71f0-ao-3
Published	09/08/2024	2f834fbbc0b6480e86731af8b28f71f0-ao-4
Published	09/08/2024	2f834fbbc0b6480e86731af8b28f71f0-ao-5
Published	09/08/2024	2f834fbbc0b6480e86731af8b28f71f0-ao-6
Published	09/08/2024	2f834fbbc0b6480e86731af8b28f71f0-ao-7
Published	09/08/2024	72beb108415e44fa93cf653a1342bff0-ao-1
Published	09/08/2024	72beb108415e44fa93cf653a1342bff0-ao-2
Published	09/08/2024	72beb108415e44fa93cf653a1342bff0-ao-3
Published	09/08/2024	72beb108415e44fa93cf653a1342bff0-ao-4
Published	09/08/2024	72beb108415e44fa93cf653a1342bff0-ao-5
Published	09/08/2024	72beb108415e44fa93cf653a1342bff0-ao-6
Published	09/08/2024	72beb108415e44fa93cf653a1342bff0-ao-7
Published	09/08/2024	72beb108415e44fa93cf653a1342bff0-ao-8
Status	Last Update	Fields