Ventilators
Terms
undefined, object
copy deck
- 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.