2.1 Respiratory Flashcards
Define perfusion
Blood flow throughout the lungs
Define defusion
Gas exchange
What does the upper respiratory system do?
Function:
cleansing, filtering, humidifying and warming inhaled air
Nose/sinuses:
nostrils separated by nasal septum
sinuses lighten skull, assist speech
produce mucus that drains to nasal cavities to help trap debris
Pharynx:
nasopharynx: passageway only for air
oropharynx: part of the pharynx that lies between the soft palate and the hyoid bone
Laryngopharynx: where both food and air pass
Upper respiratory system
Larynx
Larynx:
provides airway
routes air, food
contains vocal cords
Upper respiratory system
Trachea
Trachea:
seromucous glands that produce thick mucus
either swallowed or coughed out through mouth
The lower respiratory system
Lungs
Lungs:
elastic connective tissue called stroma
left lung smaller with two lobes
right lung larger with three lobes
The lower respiratory system
Pleura
Pleura:
pleural fluid allows lungs to move over thoracic wall during breathing
The lower respiratory system
Bronchi and Alveoli
Bronchi (larger) and Alveoli (smaller):
respiratory membrane where gas exchange
The lower respiratory system
Rib cage and Intercostal muscles
Rib cage and intercostal muscles:
Protect lungs
Sternum: manubrium, body and xiphoid process
Factors affecting respiration
Oxygen, carbon dioxide, hydrogen ion concentrations
Controlled by?
Oxygen, carbon dioxide, hydrogen ion concentrations:
Controlled by:
Respiratory centers of the medulla oblongata, pons of brain
Chemoreception in medulla and carotid, aortic bodies
Factors affecting respiration
Airway resistance, lung compliance, elasticity?
Airway resistance, lung compliance, elasticity?
Distensibility of lungs
Essential in inspiration
Factors affecting respiration
Alveolar surface tention?
Alveolar surface tension:
Surfactant
Lipoprotein interferes with adhesiveness of water molecules
Helps expand lungs
Factors affecting respiration
Respiratory volume and capacity:
Respiratory volume and capacity:
Pulmonary function test
-total lung capacity (TLC): max inflation
-vital compacity: total amount of air that can be exhaled after max inspiration
Factors affecting respiration
Air pressure
Air pressure:
- inspiration: diaphragm contracting
- expiration: passive, diaphragm relaxes
- intrapulmonary pressure: measured inside the alveoli
- intrapleural pressure: within pleural space
Respiratory assessments
thoracic
Thoracic: Respiratory rate (12-20 bpm) Anteroposterior diameter/transverse diameter ratio Intercostal retraction or bulging Chest expansion Trachea position Lung sounds
Respiratory assessments
Health interview
Health interview: Current manifestations: onset, characteristics course, severity, precipitating, relieving factors History of respiratory or lung conditions Present health status Medical history Family history Risk factors Lifestyle questions: -smoking -environmental exposures -occupational exposures -exercise -recreational drugs
Respiratory assessment
Nasal and sinus assessment
Nasal: Size Shape Color Nasal cavity health Ability to smell
Sinus:
No pain during palpitation
Breath sounds
Breath sound assessment:
Auscultation
Sounds
Crackles: short, discrete, crackling, bubbling (pneumonia, bronchitis, CHF)
Wheezes : continuous, musical sounds ( bronchitis, emphysema, asthma
Friction rubs: loud, dry, creaking sounds (pleural inflammation
Where are vesicular lung sounds heard?
Peripheries of lungs
Where are bronchiolar vascular sounds heard?
Over the bronchi
Each side of sternum
Back between scapula
Where are bronchiolar sounds heard
Closer to the throat, near the manubrium
Diagnostic tests
Sputum: gram stain, C&S, Cytology, acid-fast bacilli (AFB), detect bacterial infections in lungs. collected in A.M.
Chest x-ray
CT scan
MRI
PET scan
Thoracentesis: inserting needle, sample, remove fluid
Endoscopy: laryngoscopy, bronchoscopy, mediastinoscopy
Skin test
Blood test: arterial blood gasses (ABG’s), serology, CBC
Pulmonary function testing
Age related changes in the respiratory system
Decrease in elastic recoil of lungs Loss of skeletal muscle strength in thorax/diaphragm Fibrosis in alveoli Fewer functional capillaries Less effective cough Decrease in pulmonary O2
Patients with pneumonia
Pt with pneumonia
Leading cause of death due to infectious disease in the US
Highest incidence, mortality in older adults
Infectious or noninfectious
**causes by bacteria, viruses, fungal, other pathogens, aspiration of contents, inhalation of toxic material
Patient with pneumonia
Infectiuous classifications
Community acquired: Streptococcus pneumonia (most common) Mycoplasma pneumonia Haemophilus pneumonia Influenzae Chlamydia pneumonia Influenza virus
Nosocomial (hospital acquired): Staphylococcus aureus Gram negative bacterial -Klebsiella pneumonia -Pseudomonas aeruginosa -E coli
Opportunistic:
Pneumocystis
Physiology review of lower respiratory tract
Lower respiratory tract normally sterile
Defense mechanisms:
mucous membranes of nose (sneezing)
reflex closure of epiglottis, bronchial tree
cilia, mucus lining respiratory tract (coughing)
Aging impairs immune responses
Define pneumonia
Pneumonia:
The inflammatory response causes fluid to accumulate in the alveoli and edema to form as alveolar capillaries dilate and allow fluid to leak into interstitial tissues
Pneumonia develops
Four patterns
Four patterns:
Lobar pneumonia- involves the entire lobe of lung
Bronchopneumonia- fluid tends to remain in the bronchia’s and bronchi with less congestion in the alveoli
Interstitial pneumonia- found in the interstitial tissue
Miliary pneumonia- primarily seen in pts who are immunocompromised, typically enters through blood stream
Acute bacterial pneumonia
Acute bacterial pneumonia (quick onset):
Respiratory: cough productive of rust colored or purulent sputum
- Chest aching or pleuritic pain when coughing/breathing
- Limited breathing sounds, fine crackles, rales heard over affected area of lung
- Pleural friction rub may be audible
- Systemic: shaking chills (rigor), fever
Bronchopneumonia (slower onset):
-Insidious onset, low grade fever, cough, scattered crackles
Atypical presentation (older adults): fever, tachypnea, altered mental status, agitation, slight cough, minimal distress
Complications of Acute Bacterial Pneumonia
Typically infection resolves uneventfully
Pleuritis is most common complication
Lung abscess (relatively uncommon):
-Most common etiology
-Aspiration, resultant pneumonia
-At-risk population
Empyema- accumulation of purulent exudate in the pleural cavity.
Manifestations of Infectious Pneumonias
Pneumococcal or lobar pneumonia
Onset?
Respiratory manifestations?
Systemic manifestations?
Pneumococcal or lobar pneumonia
Onset? abrupt
Respiratory manifestations? Cough productive of purulent or rust-colored sputum; pleuritic or aching chest pain; decreased breath sounds and crackles over affected area; possible dyspnea and cyanosis
Systemic manifestations? Chills and fever
Manifestations of Infectious Pneumonias
Bronchopneumonia
Onset?
Respiratory manifestations?
Systemic manifestations?
Bronchopneumonia
Onset? gradual
Respiratory manifestations? Cough, scattered crackles; minimal dyspnea and respiratory distress
Systemic manifestations? Low-grade fever
Manifestations of Infectious Pneumonias
Legionnaire disease
Onset?
Respiratory manifestations?
Systemic manifestations?
Legionnaire disease
Onset? gradual
Respiratory manifestations? Dry cough; dyspnea
Systemic manifestations? Chills and fever; general malaise; headache; confusion; anorexia and diarrhea; myalgias (muscle pain) and arthralgias (joint pain)
Manifestations of Infectious Pneumonias
Primary atypical pneumonia
Onset?
Respiratory manifestations?
Systemic manifestations?
Primary atypical pneumonia
Onset? gradual
Respiratory manifestations? Dry, hacking, nonproductive cough
Systemic manifestations? Fever, headache, myalgias, and arthralgias dominate
Manifestations of Infectious Pneumonias
Viral pneumonia
Onset?
Respiratory manifestations?
Systemic manifestations?
Viral pneumonia
Onset? sudden or gradual
Respiratory manifestations? Dry cough
Systemic manifestations? Flulike symptoms
Manifestations of Infectious Pneumonias
Pneumocystis pneumonia
Onset?
Respiratory manifestations?
Systemic manifestations?
Pneumocystis pneumonia
Onset? abrupt
Respiratory manifestations? Dry cough; tachypnea and shortness of breath; significant respiratory distress
Systemic manifestations? Fever
Primary Atypical Pneumonia info, manifestations?
Mycoplasma pneumoniae
College students and military recruits are primary affected population
Primary atypical pneumonia is highly contagious
Called “walking pneumonia”
Mild respiratory manifestations
Pharyngitis or bronchitis
Dry, hacking, nonproductive cough
Systemic manifestations Fever Headache Myalgias Arthralgias
Viral Pneumonia info, manifestations
Mild disease
Affects older adults, people with chronic conditions
Cytomegalovirus (CMV) pneumonia is increasing in immunocompromised people.
Occurs in community epidemics
Influenza and adenovirus
Respiratory
Dry cough
Systemic
Flulike symptoms
Pneumocystis Pneumonia info, manifestation
AIDS and other immunocompromised patients
Pneumocystis jiroveci
Produces patchy involvement throughout the lungs
Alveoli thicken, swell, and fill with fluid
Abrupt onset of symptoms: Fever Tachypnea Shortness of Breath Nonproductive cough
Manifestations of Pneumocystis Pneumonia
Tachypnea, SOB Dry, nonproductive cough Intercostal retractions Cyanosis Fever
Aspiration Pneumonia, risk factors, complications
Risk Factors: Emergency Surgery or Obstetric Procedure, depressed cough reflexes, impaired swallowing, elderly surgical patients, nutrition via NG or Gastric tube, and decreased LOC
Aspiration of gastric contents into lungs
Low p H of gastric contents causes inflammation
Pulmonary edema/respiratory failure can result
Complications:
abscesses
bronchiectasis
gangrene of pulmonary tissue
Interprofessional Care of the Patient with Pneumonia-Diagnosis, tests
Chest x-ray Sputum gram stain Sputum C&S CBC, WBC w/ dif Serology when blood and sputum tests are negative Pulse ox, continuously ABG's Fiberoptic bronchoscopy
Interprofessional Care of the Patient with Pneumonia-Medications
Agents that “break up” mucus
Acetylcysteine
Potassium iodide
Guaifenesin
Broad spectrum antibiotic Macrolide Penicillin Second- or third-generation cephalosporin Fluoroquinolone
Bronchodilators
Sympathomimetic drugs
Methylxanthines
Interprofessional Care of the Patient with Pneumonia-Treatment and Prevention
Immunization
Pneumococcal vaccine
-Pneumococcal Conjugate (PCV13, Prevnar), common used in children
-Pneumococcal Polysaccharide (PPSV23, Pneumovax), given to adults, lifetime one dose.
Influenza vaccine
Treatments Oxygen therapy -For patients who are tachypneic, hypoxemic -Low- or high-flow systems Chest physiotherapy -Percussion -Vibration -Postural drainage
Nursing Care of the Patient with Pneumonia
Diagnoses, outcomes, and interventions
- Ineffective Airway Clearance
- Ineffective Breathing Pattern
- Activity Intolerance
Continuity of care
Usually treated in the community unless their respiratory status is significantly compromised or risk factors
-Advanced age
-Coexisting heart, kidney, or liver disease are present