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155 Cards in this Set
- Front
- Back
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Complications of positive pressure ventilation
CARDIOVASCULAR |
Decreased CO2, Hypotension
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Complications of positive pressure ventilation
PULMONARY |
Decrease lung perfusion to tissue, decrease gas exchange, decrease arterial blood
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Complications of positive pressure ventilation
NEUROVASCULAR |
Increase ICP, Decrease cerebral perfusion, cerebral hypoxia
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Complications of positive pressure ventilation
RENAL |
Decrease urine output
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Complications of positive pressure ventilation
GASTROINTESTINAL |
Guaiac every stool for GI bleed, check bowel sounds, typically hypactive bowel sounds. Decrease perfusion
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Complications of mechanical ventialation and artificial airways:
CARDIOVASCULAR |
Decrease BP, Increase HR
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Barotrauma: S/S
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1-sudden onset of agitation and cough associated with frequent high pressure alarm
2- BP and ABG quickly deteriorate 3- Breath sounds are suddelnyl diminished or absent 4- subcutaneous emphysema can be palpated on the front of the neck or chest. * one or more of these can occur. |
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Barotrauma: Treatment
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Insert chest tube. No way around it,
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Oxygen Toxicity
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Due to use of >50% O2 for >48 hours. 100% O2 can cause changes in 6 hrs.
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Oxygen toxicity: early S/S
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restlessness, tachycardia, malaise, fatigue, substernal CP/Discomfort.
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Oxygen Toxicity: Additional S/S
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Tachypnea, severe dyspnea, crackles, cyanosis, cough, nausea, vomiting, confusion.
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Nosocomial pulmonary infections (including VAP)
S/S |
adventitious breath sounds, changes in sputum color or quantity, fever, elevated HR and RR, increased WBC.
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Nosocomial pulmonary infections (including VAP)
Gastrointestinal |
Guaiac all stools and check Hct.
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Nosocomial pulmonary infections (including VAP)
Artificial Airway |
Safe endotracheal cuff pressure = 15-25 mmHg; check every shift!
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Suctioning and secretions
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before suction hyperoxygenate for 1 mintute
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wrist restraints
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Obligation as RN, release restraints Q2 hours and check CMS. *take off one at a time.
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Sedation and neuromuscular blocking agents.
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Paralyze pt. Give something for pain (morphine) and something to help them forget (versed)
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Sleep Disturbances
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group cares
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communication
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might have to use a board
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family support
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explain everything to the family.
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Alarm
Loss of Power |
Cause- Electricity/ Power out
Nursing Action- learn the location of all emergency power outlets in your unit. check cords and cables and keep out of traffic areas. |
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Alarm
Volume Alarms |
cause- pt may be disconnected from machine, or leak in system, or pt is not moving air.
Nursing Action-check all connections. If they are all intact, check pt for low effort and possible fatigue. |
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Alarm
Frequency |
Cause- change in RR or Inspiratory time. Pt may not have enough time to inhale.
Nursing Action- check pt effort and ventilator settings. Pt may need more support from the ventilator. |
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Alarm
Pressure |
Cause- patient requires more pressure to deliever set tidal volume.
Nursing Action- check tubes for kinks and obstruction. suction pt. Do a full assessment if compliance is falling. |
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successful weaning depends on:
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Adequate pt preparation, available equipment, and an interdisciplinary approach to solve pt problems.
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When weaning begins the nurse should assess for:
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signs of distress, rapid or shallow breathing, use of accessory muscles, reduced LOC, incr CO2, decr O2 sats, tachycardia
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During the weaning process the pt is maintained on the same or:
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higher O2 concentration than when receiving mech, ventilation.
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If stable, the pt usually can be extubated within
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203 hours after weaning and allowing spontaneous ventilation by means of a mask with humidified O2
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Weaning from the tube
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weaning from the tube is considered when the pt can breath spontaneously , maintain an adequate airway be effectively coughing up secretions, swallow and move the jaw.
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weaning from O2
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the pt who has been successfully weaned from the vent, cuff, and tube and has adequate resp function is then weaned from O2.
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Weaning and Nutrition
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success in weaning the long term vent dependent pt requires early and aggressive but judicious nutritional support.
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Respiratory weaning:
3 Stages |
removed from the ventilator, then from the tube, and finally oxygen.
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When a person has an increased H+ this can be caused by what disorders? AND what does this do to the blood pH?
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Cuased by: elevated ketones, (diabetic ketoacidosis) uremia (w/increased levels of phospahtes and sulfates), ingestion of acidic drugs (such as asparin -ASA- overdose) and lactic acidosis (such as shock or dehydration from fasting) All of this makes your blood pH decrease and makes you acidic.
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What happens to serum Lactate levles after cellular breakdown? For example from severe infection, trauma, DKA, liver failure or shock?
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They increase. Therefore you pH levels will decrease and you become more acidic.
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If a patient has diarrhea, GI fistulas, or is losing fluids from below the umbilicus (excluding urinary) what happens to their HCO3 levels?
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They go down, therefore their H+ levels increase and they become acidic.
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If someone comes in confused and disoriented what is the first lab you check?
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Electrolytes
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A HCO3 value greater than what gives you metabolic alkalosis?
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greater than 26 and a pH greater than 7.45
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What are the signs and symptoms of Metabolic alkalosis?
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Numbness, restlessness, confusion
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What are some causes of metabolic alkalosis?
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Ingestion of alkaline drugs, and go ahead and come up with something else. The notes didn't have anything listed.
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What is End tidal CO2 or PETCO2 (and no, it isn't where pets go) by the way this is non invasive.
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It's done after surger to compart to pre-op values. It is also the little bulb thing on the nasal cunnula that is used with PCA devices to monitor respiraitons.
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What is Mixed Venous oxygen saturation SVO2. By the way this is invasive.
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This is used with the Swan Ganz catheter. It gives information about how much O2 is attached to the Hgb when it comes back to the lungs after being used by the tissues. Lets you know how well the tissues are being perfused. Or how much is being used at tissue level.
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What would a falling SVO2 indicate? (shift to the right or acidotic)
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A decreased supply of oxygen or an increased demand for oxygen.
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What would a rising SVO2 indicate? (shift to the left or alkalotic)
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An increased supply, decreased demand, or a decreased extraction of Oxygen.
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What would you suspect is happening with the following signs and symptoms.
Change in mental status ABGs=hypoxemia, Increased blood lactate levels decreased urine outpus initial alkalosis then acidosis |
Septic shock early warm phase
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What is ventilation?
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The mechanical movement of air
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What is respiration?
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The process by which the body's cells are supplied with O2 and eliminate CO2
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What is external respiration?
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Movement of gases across the alveolar-capillary membrane.
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What is diffusion?
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Movement of gases down a pressure gradient form an area of high pressure to an area of lower pressure.
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What is the definition of PaO2 and what is the norm?
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The arterial oxygen tension. Norm= about 80-100
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What is the definition of PaCO2 and what is the norm?
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The arterial carbon dioxide tension. Norm = about 40
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How does surface area affect the diffusion of O2 and CO2?
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The greater the area the more gases can pass in a set period of time.
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How does the alveolar capillary membrane thickness affect diffusion of gases?
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The thinner the membrane the faster the gases diffuse.
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How much faster does CO2 diffuse than O2?
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20 times faster
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What is the definition of hypoxemia?
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PaO2 less than 50mmHg
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What is Dysoxia?
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The inability of cells to use oxygen properly, despite adequate O2.
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If you patient were exhibiting the following signs and symptoms, what would you suspect?
Dyspnea Severe tachypnea Combativeness, confusion, impaired judgement, restlessness, and diaphoresis Cardivascular dysrhythmias, HTN/Tachycardia or Hypotension/Bradycardia (I know it's all over the place) |
cue music (DUN DUN DUN)
HYPOXEMIA!!! <SCREAM!!> |
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What is internal respiration?
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Exchange of gases on a cellular level or in the tissues.
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What is the most common cause of hypoxia?
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Vasoconstriction involving the vessels around the lungs.
Expect a ventilator if BP goes too low, and they are hypoxic. Patient WILL code. |
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What are some causes of hypoxia? (other than the vessels around the lungs)
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Decrease Hgb, decreased CO, hypoemia.
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What are the signs and symptoms of Hypoxia?
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Confusion and restlessness.
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What does compliance mean? (concerning the lungs)
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Elasticity of the lungs
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What does surfactant do?
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Keeps the alveoli open, and prevent atelactesis.
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What does it mean to have a "high" V/Q ratio?
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You have plenty of air in your lungs, but it isn't getting to your tissue. It's not perfusing.
(PE, VSD, Trauma, Pulm. Infarct. cardiogenic shock) |
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What does it mean to have a "low" V/Q ratio?
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You have plenty of blood available, but there is a problem with the air in your lungs. (Collapsed alveoli, atelactasis, pneumonia, ARDS, mucous plug)
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What is a shuntlike effect?
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It is when you you have more perfusion than ventilation. (hypoventilation, bronchospasm) very responsive to O2.
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What is a silent unit?
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No Bret...just no..
It involves no ventilation and perfustion, or limited ventialtion and perfusion. (Pneumothorax, sever/acute ARDS) inequal V/Q or a V/Q mismatch |
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What is V/Q mismatching?
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You have too much or too little ventilation for the amount of perfusion present. Best detected by evaluating SpO2 (sats).
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What's the heart rate like in a pediatric patient with ARF?
Compare infant and child. |
Infant: bradycardia
Child: tachycardia leading to bradycardia |
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Whats the respiratory rate like in a pediatric patient with ARF?
Compare newborn, child, and greater than 12 years old. |
Newborn - >60bpm
Child - >30bpm Greater than 12 - >20bpm |
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Whats s/s of a pediatric patient having ARF?
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Remember: NEPCIW
Nasal flaring Expiratory grunt Paradoxical breathing Chest retractions Inspiratory stridor Wheezing |
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What's the color of a pediatric patient experiencing ARF?
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Pale, dusky, possibly cyanotic
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What's the LOC of a pediatric patient experiencing ARF?
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Altered or depressed
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What's the ABG look like for a pediatric patient with ARF?
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Decreased Pa02
Increased PaC02 |
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What's the nursing care for a pediatric patient with ARF?
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Oxygen
Fluids Glucose -- if needed Warmth |
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What are some indications for a mechanical ventilator support?
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Acute ventilatory failure
Acute hypoxemia RR > 35bpm Low V/Q ratio Neurological deterioration |
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Ventilation Equipment -
What's the ET tube for? Whats a safe cuff measure? |
Breathing tube to assist pt with breathing.
Adults require a ET-tube cuff (balloon) to keep in a stable position. Safe cuff measure is 15-25mmhg. |
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Do children need a safe cuff with an ET tube?
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No. No cuff is used since the cricoid cartilate seals around the tube.
Rests 2-4cm above the carina if measuring with an X-ray |
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When placing an ET tube, what should you watch for when placing?
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Watch for expansion in the stomach, may get stuck in wrong place.
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What's a negative pressure vent used for?
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Uses negative pressure to the thorax to expand the lung.
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What's a positive pressure vent used for?
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Requires artificial airway to deliver ventilation support
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In a positive pressure vent, what does PRESSURE-CYCLE setting do?
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Delivers a constant PRESSURE of gas to the lungs. When preset pressure limit is reached, inspiration is stopped.
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In a positive pressure vent, what does the VOLUME CYCLE setting do?
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This is the best.
Delivers preset VOLUME of gas, regardless of amount of pressure. More sensitive to the patient. |
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In a positive pressure vent, what does TIME CYCLED setting do?
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Controls length of time allowed for inspiration, but volume and pressure vary.
This is used in neonates. |
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If a patient is on a vent, which settings do we commonly monitor?
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Mode.
FiO2 Rate TV Peep |
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What is meant by VENTILATOR RATE?
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This is the patients RR.
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What is the definition of TIDAL VOLUME?
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Amount of air that moves in and out of the lungs in one normal breath.
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What is meant by FiO2 (Fraction of inspired O2)
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Percent of inpsired 02, what the machine is giving.
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What is meant by PEEP?
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This is a constant preset amound of positive pressure in the alveoli at the END of each EXPIRATIOn, forcing the alveoli to stay open.
The amount of pressure the machine is giving at the end of expiraiton. |
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What will happen if the PEEP is set to high?
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Oxygen can push into the tissue causing crepitus and crackles on the skin.
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What is meant by PS/PAV?
Pressure Support Ventilation (PS) Proportional Assist Ventilation (PAV) |
Decreases the effort of breathing by giving the patient a preset constant pressure of air at the BEGINNING of each patients INSPIRATION.
Pressure is maintained until the breath reaches a set TV. |
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What is meant by VENT MODE?
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This is the setting on the vent that starts the cycling of the ventilator.
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Describe assist and control settings on the vent.
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Assist: Patient can try to take breaths and if not able to take a full breath, machine will finish it for patient.
Control:Machine gives every breath at a set rate |
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What is the synchronized intermitten mandatory ventilation setting? (SIMV)
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A set number of machine breaths are given at a set tidal volume. However, the patient may breathe on own BETWEEN breaths.
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What is the pressure support ventilation (PSV)?
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Ventilator delivers a PRESET amount of positive pressure with each spontaneous breath.
PS can be used with SIMV and CPAP. |
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What is proportional assist ventilation (PAV)?
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Ventilator delivers an amount of positive pressure that is in proportion with the patients inspiratory effort.
Correlates with patients effort. |
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What is continuous positive airway pressure (CPAP)/Spontaneous?
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No vent. Patients ET tube may still be connected.
Used during weaning from a vent. CONTINUOUS amount of air pushed into lungs, alveoli stay open through cycle, including expiration. |
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What is a flow-by/T-piece?
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A tube attached to the artificial airway, allowing the patient to breath a mixture of atmospheric pressure and oxygen. NO PRESSURE is given.
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What is the definition of partial pressure?
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The pressure exerted by each individual gas when it is in a total volume of gas.
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What is measured in an ABG?
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Partial pressure of OXYGEN and partial pressure of CO2.
Artery, not vein. |
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In the V/Q ratio: what does V and Q represent?
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V: Ventilator (Air)
Q: Blood flow |
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What is the primary carrier for oxygen in the blood?
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Hemoglobin
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What is the definition of oxygen saturation? SpO2
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The amount of O2 bound to hemoglobin.
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When dealing with oxygen, explain a shift to the right?
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MORE oxygen is released INTO the tissue. Hemoglobin does NOT want.
Acidosis, Hyperthermia, Hypercapnia |
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When dealing with oxygen, explain a shift to the left?
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LESS oxygen is released to the tissue. Hemoglobin wants to HOLD O2.
AlkoLosis. Hypothermia. Hypocapnia. LLLeft--LLLLess O2. hoLLLd O2. aLLLkolosis. |
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What is Acidosis and how is it excreted?
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Build up a H+
Respiratory excretion in Co2 blowing off, metabolic excretion in urine and vomit. |
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What is a base?
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Can accept a H+ ion.
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What is a noraml level of pH?
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7.35-7.45
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What is a normal level of PaCO2?
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35-45
Elevated: Hypoventilation Decreased: Hyperventilation |
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What is a normal HCO3?
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22-26
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What is the definition of PaO2?
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The partial pressure of oxygen dissolved in the arterial blood.
Normal 80-100mmhg at sea level |
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What is the definition of SaO2?
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DIRECT measurment of bloods oxygen content via ABG.
Normal 95-100% Similar to pulse ox, but DIRECTLY measured. |
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What is the normal level of hemoglobin in men and women?
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Women: 12-16
Men: 13-18 |
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Define respiratory acidosis.
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PaCO2 > 45
pH < 7.35 HyPOventilation |
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S/S of respiratory acidos.
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Decreased respiratory rate, anxiety, disorientated, confused, coma.
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Causes of respiratory acidosis.
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Respiratory depression.
Decreased ventilation. Altered diffusion. COPD. |
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Define respiratory alkalosis.
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PaCO2 < 35
pH > 7.45 HyPERventilation |
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S/S/ of respiratory alkalosis
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Tingling, carpal pedal spasm, tetany, increased reflexes, palpitations, lightheaded, numb, decreased LOC
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Causes of respiratory alkalosis
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Increased respirations.
Damage to respiratory center in brain. Overventilated mechanically Fever |
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Define metabolic acidosis
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HCO3 < 22
PH < 7.35 |
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S/S metabolic acidosis
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Malaise. H/A. Confusion. Unconscious. Rapid/deep respirations
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What is the problem associated with failure of ventilation?
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Inadequate movement of airflow and an increase in CO2 retention.
PaCO2 > 45 PH < 7.30 |
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Define hypoxemia.
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Not enough oxygen in the blood.
PaO2 < 50 |
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What are S/S associated with hypoxemia?
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Dyspnea.
Tachypnea. High BP. Arrhythmias. Cynosis. |
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How is ventilation measured?
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Pulmonary function tests.
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Define Total Lung Capacity (TLC)
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Amount (VOLUME) of gas present in the lungs AFTER maximal inspiration.
Deepest breath possible |
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Define Tidal Volume (TV)
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Amount of air moving in and out of the lungs with each NORMAL breath
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Define Vital Capacity (VC)
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Maximum amount of air EXPIRED after a maximum inspiration.
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Which pulmonary disorder affects VOLUME, no problems with air flow?
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Restrictive.
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Define Restrictive pulmonary disorder.
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Decreased lung expansion.
High RR. Decreased TV. SOB. Cough. Fatigue. |
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What are some examples of restrictive pulmonary disorder?
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Broken ribs.
Obesity. Burns. ALS. MS. |
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Which pulmonary disorder affects FLOW RATE, lung volume staying the same?
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Obstructive.
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Explain the lung compliance in a patient with an obstructive pulmonary disorder.
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Increased lung compliance, loss of elastic recoil.
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S/S of obstructive pulmonary disorder.
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Barrel chest.
Hypercapnia. Acidosis. Wheeze/rhonci Accessory muscle use Emphysema |
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Two casues of obstructive pulmonary disorders.
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1) Airway narrowing - Bronchospasm
2) Airway obstruction - COPD, asthma |
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Define Cor Pulmonale
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R ventricle hypertrophies, leads to pulmonary disease
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S/S Cor Pulmonale
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Juggular Vein Distention
Edema Ascities High BP |
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How do you treat Cor Pulmonale?
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OXYGEN!!
Mechanical ventilation. Bed rest. Hold sodium/water Digoxin |
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Define acute respiratory failure (ARF)
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PaCO2 > 50
PaO2 < 50 Too much Co2, too little O2 |
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How does ARF happen?
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When exchange of gases in lungs can't keep up.
Use too much 02 and make too much Co2. |
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What is the most common cause of ARF?
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Pneumonia
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Define Pulmonary Hypertension.
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PAP Systolic > 30 (measured with catheter)
Mean > 25 Too much pressure in the lungs will cause pulmonary edema. |
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Group 1 - Pulmonary Arterial Hypertension (PAH)
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Idiopathic.
Familial. Congenital. |
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Group 2 - Pulmonary venous hypertension (PVH)
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MOST COMMON
Casued by left-sided heart failure. |
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Group 3 - Pulmonary Hypertension associated with hypoxemia
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Caused by COPD.
Lung disease. Sleep disorders. Alveolar hypoventilation. High altitude |
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Group 4 - PH due to chronic thrombotic or embolic disease.
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PE.
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Group 5 - Misc
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Sarcoidosis.
Histiocytosis. Lymphangiomatosis. Pulmonary vessel compression. |
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How do you diagnose pulmonary hypertension?
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Physical exam.
CXR. ECG. CARDIAC CATH!! |
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S/S of fractured rib.
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Splinting chest.
Shallow breaths. Avoids moving. Severe pain. |
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S/S of flail chest.
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Free floating rib section.
Severe resp distress. Acidosis. Decreased CO. Hypotension. |
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Define a tension pneumothorax.
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Air is trapped in pleural space. Breathe in and can't exhale.
Tracheal deviation to unaffected side. |
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Define open pneumothorax.
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Air moves in during inspiration and out during expiration.
Hear a sucking sound. Lung collapses. Mediastinal futter. Cover hole with hand/gauze, insert chest tube. |
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Define a thoracotomy.
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Surgical opening of the chest cavity to treat pulmonary problems.
Lung biopsy, pneumonectomy, lobectomy, resection, reduction, thorascopy |
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Define ARDS.
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Increased permeability of the alveolar-capillary membrane, causing pulmonary edema.
Give oxygen, not respond. |
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Causes of ARDS.
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Uhhh, everything.
Aspiration. OD. DIC. Bypass. Transfusions. Oxygen toxicity. Sepsis. Uremiea. Shock. |
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How do you manage ARDS?
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OXYGEN - Vent and Peep
PA catheter to determine balance. Elevate BP. |