Week 2 - Respiratory Health 1 Flashcards

(37 cards)

1
Q

Functions of the Respiratory System

A

1) Ventilation
- Inspiration - bring air into lungs
- Expiration - expelling air from lungs

2) Gas Exchange
- Gas exchange With pulmonary capillaries occurs in alveoli

3) Regulation of pH and bodily fluids
- CO2 in blood effects body pH
- Respiratory rate influence the elimination and/or accumulation of CO2 in the body impacting pH of body fluids

4) Sound Production
- Passage of air through vocal folds of larynx generates sounds with variations in pitch (frequency) and amplitude (volume)

5) Olfaction

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2
Q

What are the 3 components of a Respiratory Assessment?

A

1) History
2) Physical Assessment
3) Lab Data

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3
Q

What is Involved in a Health History?

A
  • Biographical data
  • Health status/medical history
  • Environmental factors
  • Lifestyle factors
  • HPI-OLD CARTSS
    ○ HPI - history of present illness
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4
Q

What is Involved in a Physical Assessment?

A

1) Inspection

2) Palpation

3) Auscultation
- Type of breath sound: bronchial, bronchovesicular, vesicular

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5
Q

Inspection

A

LOC
- Colour-skin, nails
○ If assessing cyanosis or pallor on a dark-skinned individuals, look beneath tongue

  • Respiratory rate (12-20)
    ○ Bradypnea - RR < 12; if low, get them to sit up; drops the diaphragm and allows better chest expansion
    ○ Usually due to problem with SNS
  • Respiratory rhythm (regular/irregular)
    ○ If breathing is irregular: count for a full minute to ensure more accuracy
    ○ If documenting apnea, document how long apenic periods last
  • Mouth breathing, pursed-lip breathing
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6
Q

Palpation

A
  • Chest expansion
  • Tenderness
    ○ If there is tenderness, it points to a musculoskeletal problem rather than a resp one
  • Tactile fremitus
    ○ Holds hands over thoracic cavity in different places and ask to repeat “99”
    ○ Chronic conditions with fibrous lugs will be flatter and have less vibration
  • Masses
  • Crepitus - escaped air under skin, feels like rice crispies
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7
Q

5 Adventitious Breath Sounds?

A

1) Wheezes
2) Rhonchi
3) Fine crackles (Rales)
4) Stridor
5) Pleural Friction Rub

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8
Q

Wheezes

A
  • high-pitched, usually on inspiration, due to narrowed/inflamed airways
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9
Q

Rhonchi

A
  • low-pitched wheezes, continuous, bubbling, due to secretions from inflammation, in large airways (sounds like snoring)
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10
Q

Fine Crackles

A
  • brief, usually at end of inspiration, popping/cracking sound, due to fluid in alveoli, coarse crackles longer, louder than fine crackles
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11
Q

Stridor

A
  • loud, high-pitched sound on inspiration, due to upper airway narrowing
    ○ Life threatening
    ○ Emergency treatment required
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12
Q

Pleural friction rub

A
  • low pitched grating/crackling due to inflammation of pleura
    ○ Accompanied with pain
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13
Q

Normal Hemoglobin Values

A

Males: 140-180 g/L
Females: 120-160 g/L

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14
Q

Normal Hemogtocrit Values

A

Males: 0.42-0.52
Females: 0.37-0.47

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15
Q

What is an Acid Base Balance

A
  • balance between input and output of hydrogen ions

-Acid: substance that releases H ions
- Base: substance that accepts H+ ions

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16
Q

Normal pH

A

pH: measure of concentration of H+

Normal pH: 7.35-7.45

  • if pH drops (increase in H+) = acidosis (pH<7.35)
  • if pH rises (decrease in H+) = alkalosis (pH>7.45)
17
Q

How do the lungs maintain acid balance

A
  • lungs take in O2 and expel CO2
  • CO2 is acidic

How Lungs Adjust Breathing
* If blood too acidic (low pH), breathing rate & depth increases to expel CO2
* If blood too basic (high pH), breathing rate slows to retain CO2

18
Q

How do kidneys maintain acid balance?

A

HCO3- is a base that neutralize acids in blood

Kidneys can:
-reabsorb HCO3
- from the urine back into the blood to maintain pH
- excrete (H+): remove excess hydrogen ions (excrete
them into urine)
- produce HCO3
- Process takes longer but effects are longer lasting

19
Q

How is Hyperkalemia caused by an acid base imbalance?

A

If acidosis occurs:
- High H+ ions outside the cell move into the cell to balance pH
- In response, K+ moves outside the cell to balance electric forces ↑ serum K+
- ACIDOSIS CAUSES HYPERKALEMIA

20
Q

How is Hypokalemia caused by an acid base imbalance?

A

If alkalosis occurs:
- H+ ion inside the cell move outside the cell to balance pH
- In response, K+ moves inside the cell to balance electric forces ↓ serum K+
- ALKALOSIS CAUSES HYPOKALEMIA

21
Q

Arterial Blood Gas Values

A
  • pH - 7.35-7.45
  • PaO2 - 80-100 mmHg
  • PaCO2 - 35-45 mmHg
  • HCO3 - 22-26 mEg/L
22
Q

Respiratory Acidosis

A
  • Caused by any condition that depresses ventilation (more CO2 stays in body=acidic) (ex. pneumonia, atelectasis, sedating meds, head injury)
  • Hypoventilation, shallow resps, low RR
  • Increased CO2, H+, H2CO3
  • Decreased pH
  • Compensatory response to HCO3 - retention by kidneys
23
Q

Respiratory Alkalosis

A
  • Caused by excessive exhalation of CO2 (hyperventilation)- sepsis, anxiety, pain, fever, pulmonary embolism
  • Hyperventilation, Increased RR
  • Decreased CO2, H+
  • Increased pH
  • Compensatory response of HCO3− excretion by kidneys
24
Q

Metabolic Acidosis

A
  • Caused by increase in acid or decrease in HCO3
  • due to starvation,
    renal failure, dehydration, diarrhea, DKA, medications
  • pH decreases
  • Compensatory response of CO2: excretion by lungs
25
Metabolic Alkalosis
- Caused by loss of acid or increase in HCO3 -. Most common cause is vomiting. Also due to diuretic therapy, K+ deficit, excess NaHCO3 intake - H+ decreases, HCO3 increases - Increased pH - Compensatory response of CO2; retention by lungs
26
What is Compensation
- Process by which compensatory mechanisms (respiratory/metabolic systems) return pH toward normal without correcting underlying problem * Respiratory system compensates for disorders in metabolic system * Metabolic system compensates for disorders in respiratory system
27
Uncompensated VS. Partial VS. Full Compensation
Uncompensated: - pH abnormal - 1 other measure abnormal - 1 measure normal Partially compensated: - pH abnormal - other measures abnormal + opposite Fully compensated: - pH normal - other measures abnormal + opposite
28
Nursing Interventions in Acid-Base Balance
- Assess ABG (only way to detect imbalance, pH) - Assess vitals - RR, heart rate/rhythm (remember impact on potassium) ○ Acid-base imbalance causes K imbalance - Assess electrolyte, BUN, creatinine, hematocrit (fluid status) - Electrolyte, fluid replacement as needed - O2 if required (if a resp problem) - Look for underlying cause and treat (ie. Vomiting, diarrhea)
29
Nasal Prongs
- Fits into nose - Delivers up to 6L/minute (4%/L) Advantages ○ Can eat/drink while wearing ○ More comfortable Limitations ○ Easily dislodged ○ Drying to nose ○ Not effective for mouth breathing
29
How to Determine Delivery System and Flow Rate
- Look at diagnosis/case of resp dysfunction - General rule: lower the SpO2 and/or more difficulty breathing, the more supplemented oxygen required - Oxygen is not a cure ○ Treat underlying condition causing hypoxia to manage and improve patient outcomes
29
What is/causes Respiratory Dysfunction?
- Disturbance in resp function (respiration, gas exchange) - Dyspnea, abnormal rate, rhytmn, effort, inability to maintain normal SpO2, abnormal acid-base imbalance Causes - Infection (pneumonia, TB, etc) - Trauma (pneumothorax) - Pathological (COPD, ASTHMA, CANCER) - Genetic (cystic fibrosis)
29
Nursing Interventions for Resp Dysfunction
- Elevate head of bed, tripod position - Breathing techniques ○ Deep breathing and coughing (mobilizes secretions) ○ Sit up, breathe in through nose, hold for 10 seconds, breathe out through their mouth, repeat 4x, on 5th one, breathe in and cough out □ If can not cough, try huffing (say huff and breath out) ○ Huffing - for clients who are in pain and can not deep breath - Maintain fluids - loosens secretions - Asses SPO2, resp rate - Auscultate lungs - Apply oxygen PRN - Suction PRN (to remove secretions) - Consider meds to enhance breathing - Rest between activities - Manage anxiety - Consider other causes of dyspnea
29
When would Oxygen be used?
- Conditions where ventilation of all areas of lung is impaired - Conditions in which has exchange is impaired - Conditions in which oxygen delivery to tissue is decreased - - Conditions in which cells are unable to use oxygen efficiently
29
Simple Face Mask
- Mask fits over nose and mouth - Ventilation holes to allow cO2 to be exhaled - Delivers up to 60% Advantages ○ Provides moderate oxygen concentrations ○ Efficiency depends on how well mask fits and patients resp demands Disadvantages ○ Confining feeling ○ Difficult to eat/drink while wearing
30
Non-Rebreather
- Simple mask with small reservoir bag attached to oxygen tubing connecting to flow meter - Series of 1 way valves between the mask and the bag and covers on exhalation ports - On inspiration, the patient only breathes in from the reservoir bag - On exhalation, gases are directed out through the exhalation ports Advantages ○ High flow ○ Delivers 60-80% Disadvantages ○ Short-term use only ○ Risk of suffocation (if bag is not full of air) ○ Requires tight seal
30
Venturi Mask
- High flow system with mask, corrugated tubing - Delivers up to 50% Advantages ○ Delivers more precise flow Disadvantages ○ Mask may be hot and confining ○ Interferes with talking and eating ○ Need a properly fitted mask
31
Nursing Care of Patients Receiving Oxygen
- Check flow rate and equipment at BEGINNING of every shift and whenever entering room for care ○ Oxygen is considered a medication - Assess resp rate frequency (q1-4 hours), depending on patient status - SpO2 may be assessed continually or intermittently ○ Check skin integrity if probe on finger continuously, change location frequently to prevent skin breakdown - Adjust oxygen delivery rate based on SpO2 changes in breathing - Oxygen is drying - frequent oral care (q1-2 hours) - Keep hydrated to loosen secretions (1500-2000mL/day) - Monitor for nosebleeds (common for ppl with nasal prongs) ○ Check if someone is on anti-coagulants - Monitor for skin breakdown around mask, nares, chin, ears, head - Tubing is a safety hazard - keep off floor, keep clean, check for proper positioning to avoid choking - Significant decreases to O2 saturation levels or large increases to maintain O2 saturation should be reported to healthcare provider - Changes in oxygen flow rates should be in 5%-10% increments - Changes in L flow should be in 1 - 2 L increments - Consider changing O2 delivery device if O2 saturation levels are not maintained at target range - Do not pause oxygen therapy to transfer/ assist a patient out of bed ○ Mobility increases oxygen demand - Do not withhold oxygen in emergency situation if there is no order. Apply O2 THEN obtain the order - Typical order for oxygen: titrate oxygen to keep SpO2 at or greater than 95% (may vary). Use clinical judgement