Lungs and Pleural Cavities Flashcards

0
Q

Stage 2 of development

A

Lung buds push against pleura (which become visceral pleura adherent to organ surface)

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1
Q

Stage 1 of development

A

Pleural cavity develops from coelomic space and lined by coelomic membrane (pleurae)

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2
Q

Contents of pleural cavity

A

Serous fluid. NOT LUNG

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3
Q

Stage 3 of development

A

Further growth of lung ⬇️ size of pleural cavity.

Bronchi and blood vessels to lung become covered w pleura

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4
Q

Endothoracic fascia

A

Layer of fascia separates rib and intercostal muscles from parietal pleura

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5
Q

Mediastinal pleura

A

Pleura in middle of lungs

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6
Q

Costal pleura

A

Adjacent to ribs

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7
Q

Diaphragmatic pleura

A

Pleura adj to diaphragm

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8
Q

Cervical pleura

A

Pleura adj to cervical vertebrae

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9
Q

Pleural Cavity Recesses clinical

A

Areas where fluid, etc can become trapped.

Normally air filled

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10
Q

Costodiaphragmatic recesses

A

on RT and LT. split like space near costodiaphragmatic pleura (anterior)

lungs DO NOT enter this space

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11
Q

Inferior border of pleura

A

Rib 8–> rib 10–> T12 as move anterior to posterior

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12
Q

Costomediastinal recess

A

near costomediastinal pleura location (LT»>RT)

anterior margin of Lungs ENTER during inspiration

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13
Q

Superior border of pleura

A

1” above costal cartilage 1

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14
Q

External pneumothorax

A

Air enters pleural cavity from channel thru thoracic wall made by knife wound

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15
Q

Internal pneumothorax

A

Air enters pleural cavity from rupture of air tubes at surface of lungs

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16
Q

Hemothorax

A

Blood in pleural cavity

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17
Q

Pyothorax

A

Pus in pleural cavity

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18
Q

Hydrothorax

A

CHF causes increased tissue fluid in cavity

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19
Q

Chylothorax

A

Lymph due to tear in thoracic duct

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20
Q

Pleurisy

A

Inflammation,

Fibrous adhesions on pleura result in “friction rub” (audible)

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21
Q

Referred pain from pleura

A

Phrenic nerve (C3-C5)

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22
Q

Costal pleura innerv.

A

Intercostal n.

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23
Q

Mediastinal pleura innerv.

A

Phrenic n.

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24
Q

Respiratory system development stage 1

A

Larngyotracheal tube bifurcated into lung buds which form 1. Main bronchi –> lobar bronchi –> segmental bronchi

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25
Q

Respiratory system development stage 2

A

Endoderm forms linings of airway.

Splanchnic mesoderm forms CT, cartilage, and muscles of airways

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26
Q

Respiratory system development stage 3

A

Pleural cavity forms from intraembryonic coelom

Pleural membranes form from lateral mesoderm

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27
Q

Parietal pleura

A

Formed from intraembryonic somatic mesoderm

Lines inner thoracic wall

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28
Q

Visceral pleura

A

Forms from intraembryonic splanchnic mesoderm

Covers lung surface

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29
Q

Esophageal atresia

A

Absence of normal lumen

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30
Q

Esophageal atresia clinical

A

Polyhydramnios in fetus

Fluid doesn’t reach small intestine for absorption

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31
Q

Tracheoesophageal fistula

A

Abnormal channel btwn 2 structures

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32
Q

Rt Lung gross anat

A

Superior Lobe, horizontal fissure (@rib 4), Middle lobe, oblique fissure, inferior lobe

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33
Q

Lt lung gross anat

A

Superior lobe w/ cardiac notch and lingula, oblique fissure (@ rib 6), inferior lobe

34
Q

Landmark of costodiaphragmatic recess

A
  1. Space between base of lung and inf border of pleural cav covered w diaphragmatic pleura
  2. 2 rib or 2 vertebral levels wide
35
Q

Midclavicular plane base

A

Lung: rib 6
Cavity: rib 8

36
Q

Midaxillary plane bases

A

Lung: rib 8
Cav: rib 10

37
Q

Posterior-inferior bases

A

Lung: T10 spine
Cav: T12 spine

38
Q

Oblique fissure levels

A

Rib 6 –> T3

39
Q

Horizontal fissure level

A

Rib 4 to midaxillary plane

40
Q

Root of lung

A

Collection of neurovascular structures that supply the organ

41
Q

Hilum of lung

A

Doorway to organ for entrance/exit of root

42
Q

Hilum of lung borders

A

Posterior: bronchus (eparterial/upper lobar, main)
Ant-sup: pulmonary artery
Ant-inf; pulmonary vein

43
Q

Where does phrenic nerve pass?

A

Anterior to lung root

44
Q

Where does trachea divide?

A

@sternal angle, becomes lt and rt main bronchus

45
Q

Pulmonary circulation

A

Deoxy–> flows from rt ventricle to pulm trunk to rt and lt pulm a.

Oxy–> flows from lungs into 2 rt and 2 lt pulm veins to left atrium

46
Q

Bronchial arteries

A

From aorta or rt 5th posterior intercostal a.

Supplies lungs w blood

47
Q

Bronchial veins

A

Drain into intercostal veins–> azygos system

48
Q

Lymph drainage

A

Bronchopulmonary nodes (at hilum)–> tracheobronchial nodes–> brochomediastinal lymph trunk

Rt: goes to a) lymphatic duct–> brachiocephalic b) brachiocephalic

Lt: a) thoracic duct–> subclavian b) subclavian

49
Q

Pulmonary ANS travel where

A

On Bronchi to lungs

50
Q

PANS

A

Constrict passages, dilate blood vessels, increase mucous secretion

51
Q

SANS

A

Dilate respiratory passages, constrict blood vessels, decrease mucus secretion

53
Q

Inspiration

A

increases size of thoracic cavity, decreasing pressure within

enlarged in vertical, A-P, and transverse planes

54
Q

Inspiration vertical diameter

A

enlarged through contraction of muscular diaphragm, resulting in flattening of its domes

55
Q

inspiration A-P diameter

A

increased by thrusting inferior ribs anteriorly through intercostal muscle attachment at the sternum;

immobilization of first rib through neck muscles and scalenes

56
Q

inspiration transverse diameter

A

same as A-P actions; “buckle handle” effect of raising downward curving ribs

57
Q

Quiet Inspiration

A

first rib fixed, normal inspiration activities;

passive; returns to pre-inspiratory process

58
Q

Forced inspiration

A

same as quiet inspiration, w/ the addition of forceful contraction of the neck muscle resulting in elevation of rib 1

active, posterior muscles pull down rib 12 and anterior muscles force ab organs against diaphragm

59
Q

Heimlich manuveur

A

similar to forced respiration, ab organs pushed into diaphragm to increase pressure

60
Q

mediastinum

A

centrally placed

contains heart, great vessels, esophagus, and trachea

61
Q

potential space

A

under negative pressure

62
Q

function of pleura

A

mesothelium (histo)

secretes serous susbstance (lubricant and film)

63
Q

1” above medial 1/3 of clavicle

A

surface projection of pleura

knife wound @ neck can puncture it

64
Q

Right side surface projection

A

continues inferiorly to xiphisternal joint

65
Q

left side surface projection

A

inf. to rib 4–> lat to sternal margin–> inf to rib 6

66
Q

C7 spine

A

marks the superior posterior extent of pleura

67
Q

intercostal nerves

A

costal pleura and peripheral part of diaphragmatic pleura

68
Q

phrenic nerve

A

medial to mediastinal pleura

innervates them and central diaphragmatic pleura

69
Q

Referred pain in pleura

A

mediastinal pain: shoulder

costal pleura @ 4th ICS: skin of nipple

70
Q

Visceral pleura innerv.

A

none! insensitive

71
Q

Cardiac notch

A

indentation in left superior lobe; lateral between ribs 4-6

72
Q

Lingula

A

tongue of left superior lobe, extends into left costomediastinal space during inspiration

73
Q

Auscultation important knowledge

A

superior lobe is anterior, posterior lobe is superior

74
Q

Pulmonary ligament

A

two layers of pleura in direct contact, post. of root

no major neurovasc structures

75
Q

Rt Main bronchus divisions

A

superior, middle,and lobar bronchi

76
Q

Lt Main bronchus divisions

A

superior and inferior lobar bronchi

77
Q

Pulmonary Trunk

A

deoxy blood, splits into Lt and Rt Pulmonary arteries

78
Q

Pulmonary veins

A

two per lung; enter left atrium

79
Q

Lt. Bronchial Arteries

A

two directly from aorta

80
Q

Rt. Bronchial Arteries

A

one from posterior intercostal artery at 5th ICS

81
Q

Deep Lymphatic Plexus

A

–>pulmonary nodes–> bronchopulmonary nodes

82
Q

Superficial Lymphatic Plexus

A

–> bronchopulmonary nodes

83
Q

Pulmonary Plexus of Nerves

A

surrounds bronchi

composed of PANS and SANS that regulate blood flow, secretions of substances, etc/

84
Q

Bronchopulmonary Segment

A

10/lung; surgical and functional unit

has own veins/arteries

can be removed with minimal blood loss and no risk of pneumothorax