| Question |
Answer |
| patent (airway) |
open or unblocked, functioning all the way to the cellular level including pulmonary, blood flow & neuro stimulation |
| mucous membrane |
thin layer connective tissue lining many body cavities air passes thru, has small mucus secretin glands, 100% humidified & sterile, warmed, lubricates & protects |
| nasal cavity |
has 3 bones: superior, middle & inferior conchae or turbinates on lateral walls |
| gag reflex |
retching or striving to vomit, reflex triggered by touching back of soft palate or throat |
| cough |
glottic opening closes tightly to trap air in lungs, abd. & thoracic muscles contract pushing gainst diaphragm & inc. pressure in tracheobronchial tree, vocal cords suddenly open & force air & foreign particles out |
| epiglottis |
leaf shaped, flexible cartilage, hangs over larynx, connected to hyoid bone, prevents food & liquid from entering larynx, important landmark for ET tube |
| Hyoid bone |
only bone in body not attached to rest of skeleton, connected to epiglottis |
| vallecula |
depression or pocket formed by base of the bongue & epiglottis |
| larynx |
triangle shaped, connects pharynx(at epiglottis) 2 trachea(lower border of cricoid cartilage), inferior hyoid bone, anterior esophagus, made of thyroid & cricoid cartilage, vocal cords & arytenoid folds |
| thyroid cartilage/"Adam's Apple" |
main laryngeal cartilage, consists of 2 large shield shaped pieces, form anterior wall & give it's V shape, posterior wall open & is muscle |
| cricothyroid membrane |
situated between top of cricoid & bottom of thyroid cartilage in larynx, site for surgical & advanced airway placement |
| cricoid cartilage |
below thyroid cartilage, attached to 1st ring of tracheal cartilage, only complete ring with posterior bulky part, narrowest part in children |
| sellick maneuver |
putting pressure on cricoid cartilage to occlude esophagus & prevent regurgitation |
| arytenoid cartilages |
2 pyramid shaped, attached to vocal folds & pharyngeal wall, open & close vocal cords, landmark for ET tube |
| glottis |
slitlike opening between vocal cords leading into trachea, in adult narrowest part |
| false vocal cords/vestibular folds |
superior pair, elastic connective tissue covered by mucous membrane, cords come 2gether & stop air from leaving lungs(holding breath)& prevent foreign objects from entering airway |
| true vocal cords |
inferior pair, cordlike, vibrate & produce sound as expired air passes over, lenth & tension determine pitch |
| vagus nerve |
richly lines larynx, stimulation of pharyngeal & laryngeal mucous membranes can cause bradycardia, hypotension & decreased respiratory rate, sends signals to medullla oblongata & pons in brain to control breathing |
| carina |
point at which bronchi seperate |
| serous membrane/pleura |
2 layer epithelial membrane that lines body cavities & covers surfaces of organs, form sac & includes 2 layers |
| apex |
top of lungs |
| base |
bottom of lungs |
| hilum |
slits in ea lung where bronchi, pulmonary blood vessels & nerves are firmly anchored in meshwork of dense connective tissue in2 lung, form "root of the lung", only spot where lungs are anchored |
| visceral pleura |
membrane closely covering the lungs |
| parietal pleura |
lines inner surface of chest wall, diaphragm & mediastinum |
| pleural space |
seperates parietal & visceral pleura in lungs, contains just a few drops of pleural fluid to prevent friction as lung tissue expands & contracts |
| external respiration |
involves exchange of gases between circulating blood & air & is carried on by expansion & contraction of lungs |
| internal respiration |
involves exchange of dissolved gases between circulating blood & interstitial fluids in peripheral tissues |
| cellular respiration |
use of O2 by cells in the process of metabolism |
| atmospheric pressure |
760 mmHg |
| diaphragm |
largest, wide muscule separating thoracic/chest cavity from abdominal cavity, slants upward anteriorly & dome shaped when relaxed, contracts downward |
| ventilation |
process of moving air in & out of lungs, includes inspiration & expiration |
| process of breathing |
initiated by respiratory center in medulla oblongata & pons in brain, respond to increased levels of CO2 in blood |
| minute volume |
volume of air exchanged in 1 min, about 6000mL - 16,000mL average, necessary to remove CO2 & bring in sufficient supplies of O2 |
| tidal volume |
air inhaled & exhaled in single respiration, 500mL - 800mL, 12-20x per min |
| dead air space |
air remaining in trachea & bronchi unavailabe for gas exchange, about 150 mL |
| physiological dead space |
development of additional dead space from diseases such as COPD or atelectasis |
| total lung capacity |
about 6L in average adult male, |
| vital capacity |
amt of air in biggest breath you can take in & out |
| PO2 or PCO2 |
abbreviation for partial pressure of O2 or carbon dioxide |
| FiO2 |
abbreviation for concentraion of O2 in inspired air |
| medulla oblongata & pons |
in brainstem, control rate & depth of breathing, connected to respiratory muscles by vagus nerve, pons 2ndary control center if medulla fails, also controls expiration |
| hypoxia |
increased respirations, insufficient oxygenation of the cells |
| hiccup |
sudden inspiration caused by spasmodic contraction of the diaphragm & intermittent spastic closure of glottis |
| sighing |
incoluntary slow deep breath followed by prolonged expiration, hyperinflates the lungs & opens atelectatic alveoli, normally about once per min |
| cheyne-stokes breathing |
regular pattern of gradually incerasing rate & tidal volume followed by gradual decrease & then short period of apnea, associated with brainstem insult |
| kussmaul breathing |
deep gasping respirations, common in diabetic coma |
| biot's respirations |
group of quick, shallow inspirations followed by regular or irregular periods of apnea, seen with increased intracranial pressure |
| central neurogenic hyperventilation |
pattern of deep rapid respirations similar to kussmaul breathing, also indicative of increased intracranial pressure |
| agonal breathing |
pattern of slow shallow irregular respirations, results from brain anoxia |
| pulsus paradoxus |
systolic B/P decreases more than 10mmHg during inspiration, seen in COPD, severe asthma, cardiac tamponade, pericardial effusion, CHF, AMI & tension pneumothorax |
| hypoxemia |
insufficient oxygenation of the blood |
| anoxia |
insufficiant oxygenation of the tissue |
| pulse deficit |
peripheral pulse is @ different rate than the ventricle is contracting, poor peripheral profusion |
| ARDS |
adult/acute respiratory distress syndrome, non-cardiac w/ cardiac signs, pulmonary edema, trauma, contusion, spasm, sepsis |
| respirations |
exchange of gases between the body cells & the atmosphere |
| dysphonia |
difficulty speaking |
| aphonia |
cannot speak |
| atelectasis |
dead space, collapse of alveoli |
| dyspnea |
shortness of breath or difficulty breathing |
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