lower resp tract assessment and diagnostics

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lower resp tract assessment and diagnostics
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2010-11-13 16:54:17
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respiratory
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exam 3
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  1. What is the equation for pack-years?
    # of packs per day x # years smoking

    e.g. person smokes a pack a day for 20 years= 20 pack-year smoker
  2. What meds are known to induce resp problems?
    • 1) ACE inhibitors (-prils, pt. may present w/ non-productive, dry cough)
    • 2) OTC syrups or inhalers
    • 3) bleomycin
    • 4) amiodarone (known to induce pulmonary fibrosis)
  3. What is the hallmark sx of resp. disease?
    cough
  4. With aging what happens to the alveoli and bronchioles? What are some nurisng interventions?
    • Alvoeoli: decr. surface area, diffusion capacity and elastic recoil and alveolar ducts dilate
    • Broncioles: ducts dilate
    • Ability to cough decreases and airway closes early

    Interventions: encourage pulmonary and oral hygiene, upright position, fluids
  5. In the older adult what happens to residual volume? What happens to vital capacity? Interventions?
    • Resiual volume: increases (amount of "dead space" a little bit =good but too much = bad)
    • Vital capacity and efficiency decr. (amount of air that can be moved out of the lungs after normal insp. and exper....a decr. vital capacity = decr. efficency of gas exchange)
    • Interventions: teach exercise importance and assss breathing pattern
  6. As pt. ages the body's response to hypercarbia and hypoxia decr. What are interventions?
    Assess for subtle sx of hypoxia...in young pt's = restlessness, in old pt's = confusion
  7. What does Immunoglobin A do and how does it affect elderly? Interventions?
    IgA is an antibody produced by lung tissue that is decr. in elderly, so they are at incr. r/f infection. Teach pt to get flu and pneumovac vaccines and exercise, pulmonary hygiene
  8. What happens to the anteroposterior diameter in elderly? Thorax? Chest wall?...
    AP diameter increases, approaches a 1:1 ratio (normal ratio= 1:2 or 5:7). Thorax becomes shorter, progressive kyphoscoliosis (curving of the spine) can be seen, chest wall compliance decr., mobility may decr., osteoporosis is possible...discuss adequate Ca intake, esp. for pre-menopausal women
  9. Discuss AP diameter ratio reading
    upon inspection during assessment look at the AP diameter compared to the lateral (side-to-side) diameter. Ratio is normally 1:2, but incr. in pt's w/ emphysema (which results in the typical barrelchest appearance)
  10. What is vocal (or tactile) fremitus? When is it incr or decr?
    Vocal/tactile fremitus is a vibration of the chest wall produced when the pt. speaks, you can feel it upon palpation. It is decr. w/ pneumothorax or pleural effusion, and incr. w/ pneumonia and abscesses bc soud travels/vibrates better through solid
  11. What is crepitus (sub-q emphysema) and when is it seen?
    crepitus is air trapped in tissues (air in pleural space has leaked into sub-q) as w/ a pneumothorax and COPD...caution that the air can push on vessels and cause hemodynamic problems
  12. What is the normal note that should be heard upon percussion?
    renosance
  13. Upon palpation what can hyperrenosance indicate?
    hyperrenosance = the presence of trapped air, so it may indicate emphysema, asthma, pneumothorax
  14. Upon palpation what can flatness indicate?
    massive pleural effusion
  15. Upon palpation what can dullness indicate?
    Dullness= atelectasis or consolidation (ex. of a dull sound can be heard over kidneys/liver)
  16. Upon palpation what can tympany indicate?
    Tympany can indicate a large pneumothorax
  17. What are tracheal breath sounds? Where should they be heard?
    harsh, high-pitched, heard over trachea, I<E
  18. What are bronchial BS? Where should they be heard? If heard on the peripheray what may they indicate?
    • loud, high-pitched, heard next to trachea, E>I
    • If heard on periphery may indicate atelectasis, tumor or pneumonia bc they are transmitted form an area of incr. density
  19. What are bronchiovesicular BS? Where should they be heard? What may they indicate?
    • medium loudness, med. pitch, heard at the sternal boarder and between scapula, I=E
    • May indicate normal aging or an abnormaility such as pulmonary consolidation or chronica airway disease
  20. What are vesicular lung sounds? Where should they be heard?
    Vesicular BS are NORMAL BS heard in the remainder of the lungs (in the periphery), they are soft, and low-pitched, I>E
  21. How can we differentiate a pleural friction rub from a pericardial friction rub?
    have pt. hold breath, if you can still hear the friction rub= pericardial (both sound like sandpaper rubbing together =inflammation)
  22. Discuss crackles
    • Air thru fluid:
    • fine: usually heard late in inspiratory phase, can usually clear up w/ coughing, usually only affects small airway
    • coarse: louder, more red flag!, may be affecting large airway also, can indicate pneumonia or CHF or other probs
  23. What is bronchophony ?
    Have pt. say "99"...while listening w/ stethoscope you shouldn't hear it clearly, if you do indicates consolidation
  24. What is whispered pectoriloquy?
    Have pt. whisper "1-2-3"...shouldn't hear clearly
  25. What is egophony?
    Have pt. say "E"...if it sounds like "A" or "Eh" = consolidation
  26. How do we use skin tests in regards to resp. assessment?
    Skin tests test for allergic rxn (delayed hypersensitivity or type 4 rxn) as evidence of exposure to tuberculosis bacillus, viruses or fungi
  27. What does a positve skin test reading indicate?
    exposure to the antigen ...it does not mean the disease is currently present
  28. What does a negative skin test indicate?
    neg= either there has been no exposure or there is depression of cell-mediated immunity d/t HIV or other active infection...(a pt. w/ decr. immunity may not react to skin test and show pos. result because they are so immunosuppressed)
  29. What are nursing considerations in re. to skin tests?
    • 1) make sure injection is intradermal, look for bleb
    • 2) mark sites w/ circles and instruct pt. not to wash off, draw diagram and label
    • 3) read using good light and look for induration (hardness) not redness
  30. Discuss TST (tuberculin skin test)
    • -0.1 ml of Pruified Protein Derivative (PPD) injected intradermally in forearm
    • -area of induration measuring 10 mm or greater in diameter 48-72 hr after injection indicates TB exposure
    • -area of 5mm or greater is considered positive in pt's w/ HIV infection
  31. What does a positive TB reading indicate?
    exposure to TB or presence of inactive (dormant disease)
  32. What does a reduced skin rxn or neg. TB reading indicate?
    • it does not rule out TB in very old or immunocompromised....
    • Anergy= failure to have a skin response bc of reduced immune function when infection is present
  33. Whhy do we do a 2nd TB injection test and when can it be done?
    • W/ the first TB test we may "wake up the disease" but it doesn't show induration (a pos reading) but if we do a 2nd test it's more definitive (but still not 100%)
    • The 2nd test can be done 1wk to 1year after the first.
  34. What are some of the reasons we do a PFT?
    • -diagnose pulmonary dx progression
    • -evaulate disablity and determine the effect of occupation on lung function
    • -serial testing can be used as a guide for tx...evaulate response to bronchodilators (and other tx)...should we change, continue, or discontinue current therapy?
    • -to determine the need for ventilatory support or readiness to be weaned from ventilator
    • -often done pre-op in pt's w/ COPD to see if they need to be on a vent after surgery
    • -to screen pt's for lung dx even before the onset of sx
    • -to determine the cause of dyspnea:
    • -when performed when pt. exercises, PFT's help differentiate lung dx from caridac dysfunction or muscle weakness
  35. What is the nursing care for a PFT?
    • -spirometer used at bedside or in diagnostic department. Client breaths through mouth only and a nose clip may be used . Verbally coach pt to make sure they exhale as much as possible
    • -advise client not to smoke 6-8hr before test
    • -according to reason for test hold bronchodilators for 4-6 before PFT (hold if you want to see if pt ready to stop meds, give if you want to assess pt's response to meds)
    • -monitor for dyspnea, bronchospasm and fatigue after test
  36. What is FVC (forced vital capacity)
    FVC= max amount of air that can be exhaled as quickly as possible after max inhalation (breathe in as much as you can then breathe out fast as you can)

    FVC indicates respiratory muscle strength and ventilatory reserve. FVC reduced in obstructive dx (bc of air trapping) and in restrictive disease)
  37. What is FEV1 (Forced Expiratory Volume in 1 second)?
    FEV1 records the max amount of air that can be exhaled in the first second of expiration

    FEV1 is effort dependant and declines normally w/ age. It is reduced in certain obstructive and restrictive disorders

    -commonly done at bedside w/ peek flow meter to monitor pt's response to meds
  38. What is FRC (functional residual capacity)
    FRC is the amount of air remaining in the lungs after normal expiration. FRC requires the use of helium dilution, nitrogen washout, or body plethymography technique

    FRC indicates hyperinflation or air trapping so it's increaesd in obstructive pulmonary disease and decreased or normal in restrictive pulmonary disease
  39. What is TLC (Total Lung Capacity)
    TLC = the amount in the lungs at the end of maximum inhalation

    • Increased in obstructive disease d/t air trapping
    • Decreased in restrictive disease
  40. What is RV (Residual Volume)?
    • RV= the amount of air remaining in the lungs at the end of a full, forced exhalation
    • RV is increased in obstructive pulmonary disease such as emphysema (air trapping)
  41. Why would a pt. need a bronchoscopy?
    • -to assess airway anatomy for tumors (cancer staging or culture for infection can be done w/ brush or needle bx), obstruction and atelectasis
    • -to remove thick secretions, mucous plugs, or foregin bodies
  42. How is a bronchoscopy performed?
    a flexible fiberoptic bronchoscope is inserted through the mouth, nose, ET tube or trach. May be performed under low-dose sedation
  43. What is the nursing care for a pt. undergoing a bronchoscopy?
    • -NPO prior to the test (usually 4-8 before)
    • -informed consent signed
    • -assess allergies to iodine, local anesthetic or premeds (atropine to dry secretions and valium to relax)
    • -place pulse ox
    • -remove dentures
    • -monitor VS q15 until stable
    • -monitor for hemoptysis
    • -NPO until gag reflex returns (gently insert tongue blade and have pt. say ahh. they should gag
    • -discourage smoking, talking, couhging for several hrs
  44. What is a thorocentesis?
    • -Aspiration of air or pleural fluid from the pleural space for diagnosis or tx purposes
    • -pleural fluid may be drained to releive pulmonary compression and resultant resp. distress caused by cancer, pleurisy, TB, CHF...
    • -often followed by pleural bx to further assess
    • -can also do pleurodesis- instill meds such as AB or chemo into pleural space
  45. What is the nursing care for a thoracentesis?
    • -informed consent
    • -check for allergies to betadine and anesthetic
    • -position pt. appropriately and instruct to avoid coughing, deep breathing or sudden movement
    • -tell pt. to expect a stinging sensation weh the local anesthetic and pressure when needle (trocher) is inserted
  46. Discuss thoracentesis nursing care more...
    • -may be performed at bedside or under ultrasound or CT guidance
    • -HCP's wear goggles/mask
    • -18-25G needle insertede into pleural space and attached to a syringe, vaccum collection bottle may be necessary to collect larger volumes
    • -observe for shock, pain, nausea, pallor, tachypnea, dyspnea
    • -cough is common after lung re-expands
    • -usuall no more that 1000 ml removed at one time to prevent re-expansion and pulm edema
    • -if bx performed second larger needle w/ cutting edge and collection chamber is used
    • -after needle withdrawn, apply pressure and small sterile drsg
  47. What are some nursing considerations following a thoracentesis?
    • -CXR to r/o pneumothorax and mediastinal shift
    • -moitor VS and breath sounds on affected side, compare to unaffected (if sounds diminished worry about pneumothorax)
    • -assess for complications such as re-accumulation of fluid, crepitus, infection, and tension pneumothorax (air escaped and pushed lung over, can push on heart and great vessels, we will see hemodynamic changes! assess for tachycardia, watch O2 sat, tracheal deviation...)
    • -encourage deep breathing to promote lung re-expansion
    • -document pt's tolerance, volume and character of fluid removed and specimens sent to lab, location of puncture site and resp. assessment before, during and after procedure

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