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23 Cards in this Set

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What is the most frequently used mechanical ventilation?
Positive pressure ventilators
Name the 4 types of positive pressure ventilators?
Volume, Pressure, Flow, Time cycled ventilators
Vent mode used for pts who are apneic. Delivers preset volume no matter the breathing efforts of patient?
Control vent (CV)
Vent mode used for spontaneously breathing but weak respiratory muscles. Delivers a breath in response to pt. effort & if pt. doesn't breath in limits set, vent gives breath.
Assist Control Vent (ACV)
Vent mode used to wean pts from mechanical vent. Breaths fully in sync w/pts own resp effort?
Synchronous Intermittent Mandatory Vent (SIMV)
Vent mode used with SIMV during weaning. Has a preset pressure that changes with the breath effort & decreases the work of breathing.
Pressure Support Ventilation (PSV) or Pressure Controlled Ventilation (PCV)
Vent mode used with CV, AC and SIMV to improve o2 by opening collapsed alveoli. Positive pressure applied at the end of expiration.
Positive End Expiratory Pressure (PEEP)
Vent mode that maintains constant positive pressure to decrease resistance. Similar to PEEP but used only in spontaneously breathing.
Constant Positive airway pressure (CPAP)
The vent setting VT refers to what?
the amount of 02 delivered with ea. breath. Normally about 10.
Respiratory Rate vent setting (# of breaths min) is normally?
4-10 min
The % of oxygen given by vent with each breath. This setting is usually set at what?
21-100%
I/E ratio is the duration of inspiration to expiration time and is normally set at?
1:2 usually
Vent sensitivity determined the effort pt must make before vent gives a breath. If too low? If too high?
low-pt will have to work harder

high-patient may fight the vent
Vent flow rate sets how fast VT will be given during inspiration. What if High? What if Low?
Increased airway pressure if high

Decreased airway pressure if Low
Pressure limits set to reg max amt of pressure the vent uses to deliver VT. What happens to the mech ventilation when pressure limit reached?
Stops giving ventilation
Whats the term for vent overfill of the alveoli, rupture & leak. Cause pneumothorax, subq emphysema or crepitus?
Barotrauma
Hypotension can be caused by the use of ___ in vents.
PEEP
What GI problems are assoc w/use of mech ventilators?
Stress ulcers bleeding, decreased nutrition, and paralytic ileus.
After ET tube or trach placed what is high risk and what should be done?
infection, good pulmonary cleaning
Explain mechanism of high pressure alarms & give some causes?
Something that prevents a ventilation from passing into pt, creating a back flow to vent (increased pressure) secretions block, kink in tube, cough, gagging, talking, bronchospasm, mucus plug
Explain mechanism of low pressure alarms and some causes?
no pressure/resistance met by ventilation; tubing disconnected, ET tube or trach came out
High Resp Rate alarm can be caused by?
Anxiety, pain, secretions, hypoxia, hypercapnia
Low exhalation volume alarm can be caused by?
circuit disconnected, leak in cuff, another alarm preventing delivery of breath.